CN106007414B - A kind of efficient quicklime slaking and dust pelletizing system - Google Patents

A kind of efficient quicklime slaking and dust pelletizing system Download PDF

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Publication number
CN106007414B
CN106007414B CN201610379793.1A CN201610379793A CN106007414B CN 106007414 B CN106007414 B CN 106007414B CN 201610379793 A CN201610379793 A CN 201610379793A CN 106007414 B CN106007414 B CN 106007414B
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water
dust
babinet
digestion
digester
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CN106007414A (en
Inventor
周志安
李文林
苏道
李康
代友训
夏春才
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Zhongye Changtian International Engineering Co Ltd
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Zhongye Changtian International Engineering Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2/00—Lime, magnesia or dolomite
    • C04B2/02—Lime
    • C04B2/04—Slaking
    • C04B2/08—Devices therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/02—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath
    • B01D47/021—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath by bubbling the gas through a liquid bath
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D2247/04—Regenerating the washing fluid

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treatment Of Sludge (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

Two-stage burnt lime digester, it includes：Feed inlet, sealing transportation section babinet, water injector, sealing dust excluding hood, at upper digestion babinet blanking and disclose material mouth, second digest section babinet, discharge port the first digestion section babinet；Wherein：Equipped with a pair of the first agitating shaft with stirring blade in the first digestion section babinet, this pair of both first agitating shaft is driven by first driving means and the direction of rotation of the two is opposite；In addition, equipped with a pair of the second agitating shaft with stirring blade in the second digestion section babinet, this pair of both second agitating shaft is driven by the second driving device and the direction of rotation of the two is opposite；With sealing dust excluding hood, which has, to gather dust external tapping.

Description

A kind of efficient quicklime slaking and dust pelletizing system
Technical field
The present invention relates to steel sintering factory quicklime slaking fields, more particularly to are a kind of efficient quicklime slaking and dedusting System.Mainly solve the problems, such as digestion and the digestion dedusting environmental pollution of quick lime.
Background technology
With the development of modern industry, the raising of people's living standard, the requirement to environmental protection is higher and higher, safety in production, Clean manufacturing has become the mark of modern enterprise civilization.
In iron and steel metallurgical industry, generally require iron ore into being sintered before blast furnace ironmaking, and quick lime pair Sintering process plays more important role, and first, the granulating efficiency of mixed material is improved, improves bed permeability, with digestion Before compare, mixture>The grade of 3mm increases 10% or more, and productivity of sintering machine can be made to improve 3%-5%；Second, contain There is Ca (OH)2Sintering feed bead have higher wet volume capacity, thus thermal stability is good in sintering process, can resist dry zone Destruction mitigates the influence of excessive moistening layer；Third improves material temperature；4th, reduce the consumption of solid fuel.Studies have shown that due to The raising of material temperature is pelletized compared with the improvement of fruit, and Sintering Yield can be improved 10% or so, save coke powder 1.5kg/t；Quick lime at present Have become one of sintering plant main flux, matches in 3%-5%.
Current use of the quick lime in sintering is very undesirable, is primarily present problems with：
One, sintering plant generally uses single-stage digester, and digestion time is short, and digestibility is low, and indigested quick lime is mixed one Continue to digest in mixing with two.1~1.5 times of volume expansion when quicklime slaking destroys the granulation bead of balling-up, influences the bed of material Gas permeability does not give full play to the digestion of quick lime.
Two, unspecial digestion deduster.A large amount of ash-laden gas are will produce when quicklime slaking, due to flue gas characteristic The dust removing effects of particularity, common deduster cannot be satisfied national emissions concentration standard, and very due to lime dust caking property By force, cleaning shaft blocking, fan vibration etc. are easily caused.
Three, in addition, dedusting sewage, steel-smelting sewage sludge, dedusting sludge etc. are not effectively addressed, cause waste and it is secondary Pollution.
The presence of problem above seriously affects the digestion, dedusting, the processing for also having sewage sludge of quick lime.In order to solve to burn Quicklime slaking and dust removal problem in knot further improve energy-saving and emission-reduction in sintering process and work, need to design quicklime slaking And dust pelletizing system is poor to solve the problems, such as to give birth to grey digestion effect, and solve the dust removal problem that quicklime slaking is brought.
Invention content
The purpose of the present invention is to provide a kind of efficient burnt lime digester, to solve, digester digestive efficiency is low and digestion The problems such as problem of effect difference and a large amount of dust smoke pollution.
The present invention provides a kind of efficient burnt lime digester, which is multistage digester, provides perfect multistage and disappears Chemical industry skill, quick lime are fallen from ash cellar on the belt conveyer scale under storehouse, then are sent into multistage digester and are disappeared by screw conveyor Change.
Digester described herein is multistage digester, that is, digest section have it is upper and lower two or more.
It is another object of the present invention to provide a kind of efficient quicklime slaking and dust pelletizing systems, are disappeared with solving quick lime Change it is insufficient, the problems such as the low problem of digester efficiency of dust collection and cleaning shaft blocking, fan vibration, dusting waste water treatment.
Solve limeslaker dust removal problem it may first have to understand the technique of lime slaking and the physics of dust, chemistry Characteristic.Quicklime slaking is a chemical reaction process, i.e. quick lime (CaO) plus water (H2O calcium hydroxide (Ca (OH)) is generated2) And release a large amount of heat.The dust main component that digester generates is CaO, Ca (OH)2And water vapour.Dust is being collected and is being located During reason, calcium hydroxide (Ca (OH)2) and generate calcium carbonate (CaCO with the carbon dioxide reaction part in air3), Ca (OH)2And CaCO3Deng being easily adhered on deduster and dedusting tube wall, here it is cause deduster and cleaning shaft to block, wind turbine The true cause of vibration.
A kind of efficient quicklime slaking of present invention offer and dust pelletizing system are not filled with solving quicklime slaking in the prior art Point, there is lime dust to collect, the problems such as deduster and cleaning shaft blocking, fan vibration, dust waste water recycle.
According to the first embodiment of the present invention, two-stage burnt lime digester is provided, it includes：Feed inlet, front end with The sealing transportation section babinet that feed inlet is connected, the first digestion section babinet being connected with the rear end of sealing transportation section babinet, position Water injector in the top of the first digestion section babinet or side；Sealing dust excluding hood positioned at the first digestion section top of the box, position In in the first digestion section babinet and at the upper digestion babinet blanking of that one end far from feed inlet and disclosing material mouth, it is located at the first digestion The second digestion section babinet below section babinet, is located in the second digestion section babinet and close to the discharge port of that one end of feed inlet； Wherein：Equipped with a pair of the first agitating shaft with stirring blade, this first a pair of agitating shaft in the first digestion section babinet The two is driven by first driving means and the direction of rotation of the two is opposite；In addition, being equipped in the second digestion section babinet A pair of the second agitating shaft with stirring blade, this pair of both second agitating shaft are driven simultaneously by the second driving device And the direction of rotation of the two is opposite；With sealing dust excluding hood, which has, to gather dust external tapping.
According to the second embodiment of the present invention, three-level burnt lime digester is provided, it includes：Feed inlet, front end with The sealing transportation section babinet that feed inlet is connected, the first digestion section babinet being connected with the rear end of sealing transportation section babinet, position Water injector in the top of the first digestion section babinet or side；Sealing dust excluding hood positioned at the first digestion section top of the box, position In in the first digestion section babinet and at the upper digestion babinet blanking of that one end far from feed inlet and disclosing material mouth, it is located at the first digestion The second digestion section babinet below section babinet, is located at the second digestion in the second digestion section babinet and close to that one end of feed inlet At babinet blanking and material mouth (i.e. discharge port) is disclosed, is located at the third below the second digestion section babinet and digests section babinet, be located at third Digest the discharge port of that one end of the interior and separate feed inlet of section babinet；Wherein：Equipped with a pair of tool in the first digestion section babinet There is the first agitating shaft of stirring blade, this pair of both first agitating shaft is driven by first driving means and the two Direction of rotation is opposite；Equipped with a pair of the second agitating shaft with stirring blade in the second digestion section babinet, the of this pair Both two agitating shafts are driven by the second driving device and the direction of rotation of the two is opposite；It is built-in in third digestion section babinet There is a pair of third agitating shaft with stirring blade, this pair of both third agitating shaft is driven by third driving device And the direction of rotation of the two is opposite；With sealing dust excluding hood, which has, to gather dust external tapping.
In above-mentioned two embodiment, it is preferable that one in the second agitating shaft be located in the first agitating shaft one A underface, and they are opposite with the direction of rotation of the two.
Further preferably, one in the second agitating shaft is located at one underface in the first agitating shaft, and They and both direction of rotation on the contrary, one be located in the second agitating shaft with one in third agitating shaft just under Side, and the direction of rotation of both is opposite.
It is preferred that the input terminal of water injector and initial water supply line are external, output end by automate flowmeter water valve with Multiple telescopic sprinkler head connections positioned at the top of the first digestion section housing interior volume；Preferably, flow is automated Meter water valve is electrically connected to carry out automation control to water and has cutting function with Master Control Room；It may further be preferable that more A scalable sprinkler head carries out flexible adjustment, length arrangement straggly according to the length of digestion section babinet.
In addition, the initial water supply line of water injector is connected to the hot water outlet of external heat exchanger.The heat exchanger has The heat gas import of cooling water inlet and hot water outlet and heat and the cooling gas outlet after heat exchange.As shown in Figure 2 a.
It is preferred that the height of sealing dust excluding hood set above the first digestion section babinet is along the material conveying side of the babinet To gradually increasing, the external tapping that gathers dust is located at the end of dust excluding hood, passes through gather dust external tapping and extraneous deduster or the dedusting system The pipeline of system is connected.
It is preferred that being additionally provided with digestion babinet maintenance dress on the babinet of two-stage burnt lime digester or three-level burnt lime digester It sets, which includes that one or more digestion babinet apparatus for examination and repair doors and one or more digestion babinet apparatus for examination and repair doors are lived Dong Lian mechanisms；Preferably, one or more digestion babinet apparatus for examination and repair door moving connecting mechanisms are installed in the second babinet Bottom is installed in the second babinet and the respective bottom of third babinet simultaneously, digests bottom and the digestion of babinet apparatus for examination and repair door Babinet apparatus for examination and repair door moving connecting mechanism connects, and door can be rotated around the moving connecting mechanism, digestion babinet apparatus for examination and repair door Top is snapped connection with lower box top, i.e., this top can open and close.
In this application, the also referred to as upper and lower two-stage digester of two-stage digester, three-level digester also referred to as upper and lower three Grade digester.
The length of two-stage or three-level digester in the application is usually 3-30m, preferably 4-20m, more preferable 5-10m.This Two-stage or three-level digester in application can be supported on holder or on pedestals.
According to the third embodiment the present invention, quicklime slaking and dust-extraction unit are provided, it includes any of the above described one The digester and wet dust collector of kind, the latter are connected by a cleaning shaft with the external tapping that gathers dust of digester；
Wherein wet dust collector includes：
Dedusting pond；
Shell of dust remover above dedusting pond；
Cleaning shaft,
It is characterized in that：One end of cleaning shaft is external to the output end of one or more collection devices containing dusty gas (such as dedusting interface of limeslaker), the other end pass through shell of dust remover and stretch into below shell of dust remover from top to bottom In dedusting pond, one end that cleaning shaft stretches into dedusting pond is provided with liquid down tube channel showerhead, wherein liquid down tube channel showerhead End is reticular structure or porous structure；Preferably, cleaning shaft is passed through from the middle part of shell of dust remover (i.e. along axis Line).
It is preferred that the deduster further includes：Overflow water seal water pond positioned at dedusting pond side, and in dedusting pond and overflow Between flowing water water shutoff pond, in the water level regulation hole that the lower end of shell of dust remover side is issued；It is further preferred that in water level regulation It is equipped with card on the outside of shell of dust remover by hole and puts slot and water level control apparatus, which includes water level regulation plate, spiral shell Swing arm, regulating valve, water level regulation board are placed on the card and put in slot, and one end of screw rod is connect with water level regulation plate, screw rod The other end connect with regulating valve, wherein the vertical width of water level regulation plate be slightly larger than water level regulation hole vertical width.
It is preferred that the deduster further includes：Cover board above overflow water seal water pond, one end and the deduster shell of cover board are set Body connects, and the other end is inserted into overflow water seal water pond；It is further preferred that being opened on cover board there are one through-hole, screw rod is logical across this Hole.So that screw rod is moved up and down along the through-hole by the effect of regulating valve, therefore water level regulation plate is driven to move up and down.
It is preferred that overflow water seal water pond top is provided with overflow pipe, for adjusting the water level in overflow water seal water pond；More preferably , overflow pipe is equipped with overflow pipe valve.
It is preferred that be provided with water supply pipe on dedusting pond, for supplement water in dedusting pond；Preferably, moisturizing water Pipe is equipped with moisturizing pipe valve.
It is preferred that dedusting basin bottom is funnel-form or " V " type or is rendered as inversed-cone shape, dedusting basin bottom is equipped with dirt Sewage sludge tapping equipment；It is further preferred that being additionally provided with hydraulic gage in sewage sludge tapping equipment.
It is preferred that being provided with holder above dedusting pond in shell of dust remover, it is provided with as bubble below holder It punctures first group of woven wire (preferably V-type filter screen or V-type woven wire) a little and is provided with second group above holder Woven wire (preferably reverse V-shaped woven wire)；Preferably, first group of woven wire and/or second group of woven wire interlock Oblique arrangement, point of intersection are provided with sealing card.
It is preferred that sprinkler head is provided with above second group of woven wire, for spraying dedusting on second group of woven wire Water or dedusting liquid；Preferably, water blocking demisting plate is provided with above sprinkler head, above the water blocking demisting plate on shell of dust remover It is provided with net air outlet.
It is preferred that deduster further includes control system, hydraulic gage, overflow pipe valve and moisturizing pipe valve are connect with control system, control System control hydraulic gage, overflow pipe valve and moisturizing pipe valve processed.
According to the 4th kind of embodiment provided by the invention, a kind of application method of wet dust collector is provided or using above-mentioned The method that wet dust collector is dusted, this approach includes the following steps：
(1) by water supply pipe water storage into dedusting pond, water level regulation plate is adjusted, keeps water level arrival in dedusting pond predetermined Value closes moisturizing pipe valve；
(2) dusty gas (such as the dust flue gas come from the dedusting interface of burnt lime digester) by cleaning shaft from upper Enter in deduster in the middle part of shell of dust remover under and, by the uninterrupted of smoke property and flue gas, adjust water level control apparatus, Cleaning shaft is set to be inserted into certain position (such as 0.2-0.8m) in dedusting pond, cleaning shaft is inserted into underwater one and is provided with net The liquid down tube channel showerhead of shape structure or porous structure；
(3) (with certain speed), dusty gas flows through cleaning shaft and sprays (at a relatively high speed) at the liquid down tube channel showerhead Go out, enter in water after generating percussion to water layer, the direction of motion of gas changes, and grit then continues due to the effect of inertia It moves, is stayed in water after wherein most grit and water adhesion, smoke-shock water body is through liquid down tube channel showerhead by original direction Reticular structure cuts into minute bubbles, increases the contact area of flue gas and water, strengthens capture of the water in dust removal to dust, realizes the Level-one impulse type water bath dedusting；
(4) pass through water bath dust-removing, most of dust is removed in flue gas, and remainder particle dust is by first group of gold Belong to silk screen and form the second moisture film that first of moisture film and second group of woven wire are formed, twice moisture film is to the fine powder in flue gas Dirt is captured, and realizes that second level filtering type water film dedusting, purified gas are arranged after the processing of water blocking demisting plate from exit Go out.
(5) prolonged dedusting is passed through in dedusting pond, has turned into sewage, by the sewage from funnel-form or " V " type water in dust removal The sewage sludge tapping equipment in bottom of pond portion is discharged, and moisturizing is carried out from water supply pipe.
In the present invention, liquid down tube channel showerhead extends into certain position, insertion depth and powder in housing bottom dedusting pond Dirt property is related, generally 20-80cm.Soot density is big, particle is thick, then insertion depth is such as 20~50cm；Soot density It is small, particle is thin, then insertion depth is 30~80cm, and the purpose of pipeline nozzle is that flue gas is divided into multiple air columns to enter in water, Increase contact of the flue gas with water, improves efficiency of dust collection.
In the present invention, it can make that water level is raised in dedusting pond when being passed through dusty gas or flue gas, excessively high water can The overflow pond being arranged on the outside of adjustable plate is flowed to from water level regulation hole, and the water level in dedusting pond can be made to keep suitable in this way Highly, can not only flue gas be made smoothly to be pumped into, but also also assures and does not have water depth to nozzle.
In the present invention, it is provided with holder above dedusting pond in shell, first group of metal is provided with below holder Silk screen, the woven wire are one group of V-type filter screen, for the flue gas bubble from dedusting pond out to be punctured, and the gas that scatter Stream.Reverse V-shaped second group of woven wire is provided with above holder.Second group of woven wire alternating inclinations arrangement, point of intersection setting There is sealing to block, side is provided with sprinkler head on a wire mesh, is used for spraying dedusting liquid on woven wire, be formed on metal mesh The moisture film to flow downward, then the bubble that flows to below holder puncture net and form second moisture film, fully capture dust.
In the present invention, water level control apparatus is arranged in this deduster, and water is realized by adjusting the height of water level regulation plate Position regulatory function, when deduster exhaust fan starts, negative pressure is uprushed in deduster, and water level increases suddenly, but water can be from water level regulation Hole is discharged to overflow water seal water pond, ensures that liquid down tube channel showerhead does not have water depth to stablize within limits, to protect wind turbine to keep away Exempt from resistance to uprush and burn motor.When deduster normal operation, plate or more can be controlled to adjust by water level control apparatus regulating valve It is mobile, water level is adjusted, nozzle capable of on-line does not have water depth, ensures the stabilization and Effec-tive Function of equipment.
According to another aspect of the present invention, provide it is a kind of using include two-stage burnt lime digester above-mentioned digestion with The quicklime slaking and dust removal method of dust-extraction unit, this approach includes the following steps：
1) quicklime slaking：Quick lime is put into the feed inlet of two-stage burnt lime digester, via sealing transportation section Babinet is transported in the first digestion section babinet, by the water injector positioned at the top of the first digestion section babinet or side to the The quick lime material moved in one digestion section babinet is sprayed water so that quick lime moves one on one side under the stirring action of agitating shaft While be mixed and digest, enter later in the second digestion section babinet. while moving under the stirring action of agitating shaft again Further mixing and digestion occurs, postdigestive quick lime is discharged via the discharge port of burnt lime digester bottom；With
2) dedusting of dusty gas：The external tapping that gathers dust of dusty gas from sealing dust excluding hood in sealing dust excluding hood is defeated Go out the cleaning shaft to wet dust collector, dusty gas is injected into the water in dedusting pond by the liquid down tube channel showerhead of cleaning shaft In, it is dusted by being contacted with water, the net air outlet that the gas after dedusting is arranged from shell of dust remover is discharged.
According to a further aspect of the invention, provide it is a kind of using include three-level burnt lime digester above-mentioned digestion with The quicklime slaking and dust removal method of dust-extraction unit, this approach includes the following steps：
1) quicklime slaking：Quick lime is put into the feed inlet of three-level burnt lime digester, via sealing transportation section Babinet is transported in the first digestion section babinet, by the water injector positioned at the top of the first digestion section babinet or side to the The quick lime material moved in one digestion section babinet is sprayed water so that quick lime moves one on one side under the stirring action of agitating shaft While be mixed and digest, enter later in the second digestion section babinet. while moving under the stirring action of agitating shaft again Further mixing and digestion occurs, enters later in third digestion section babinet and is moved on one side under the stirring action of agitating shaft again Further mixing and digestion occur on one side, postdigestive quick lime is discharged via the discharge port of burnt lime digester bottom；With
2) dedusting of dusty gas：The external tapping that gathers dust of dusty gas from sealing dust excluding hood in sealing dust excluding hood is defeated Go out the cleaning shaft to wet dust collector, dusty gas is injected into the water in dedusting pond by the liquid down tube channel showerhead of cleaning shaft In, it is dusted by being contacted with water, the net air outlet that the gas after dedusting is arranged from shell of dust remover is discharged.
A kind of efficient quicklime slaking and dust pelletizing system, it includes digester, wet dust collector, further include extractor fan, Chimney, dusting waste water treatment device, sludge treatment equipment, cleaning device and Slaked lime conveying device and batch mixer, water bath dust-removing Device is connected by a cleaning shaft with the external tapping that gathers dust of digester；Slaked lime conveying device is located at the discharge port of digester Place, batch mixer are connect with Slaked lime conveying device, and the net air outlet of wet dust collector is connect by extractor fan with chimney, water The overflow pipe of bath deduster is connect with dusting waste water treatment device, at the sewage sludge tapping equipment and sludge of dedusting basin bottom Device connection is managed, dusting waste water treatment device is connect with cleaning device.
Optionally, dusting waste water treatment device is connect with sludge treatment equipment.
Preferably, sludge treatment equipment includes press filtration water out and press filtration sludge outlet, press filtration water out is filled with cleaning Connection is set, press filtration sludge outlet is connect with digester.
In the present invention, digester is multistage burnt lime digester, such as：Two-stage burnt lime digester, three-level quick lime Digester.Dusting waste water treatment device includes stirring pool, sedimentation basin, clear water reserviors, pipe-line equipment etc..Sludge treatment equipment includes pressure Filter device, grinding device etc..
A kind of quicklime slaking, dedusting and sewage treatment process, include the following steps：
(1) quicklime slaking：Quick lime is put into burnt lime digester and is digested quick lime using water；
(2) dedusting of dusty gas：The dusty gas being discharged in burnt lime digester be output in wet dust collector into Row dedusting, the dedusting sewage in the dedusting pond of wet dust collector bottom are discharged into stirring pool；
(3) sewage in stirring pool is transferred to sedimentation basin neutralization and is optionally transported in burnt lime digester and is used as disappearing Change water, by settlement of sewage, layering in sedimentation basin, upper layer is precipitation water, and lower layer is precipitating sludge；
(4) the precipitation water in sedimentation basin is transferred in clear water reserviors, the water clarified water pump in clear water reserviors passes through fresh water pipeline It is transported to cleaning device, and optionally the water in clear water reserviors is transported in burnt lime digester and is used as digestion water；
(5) precipitating sludge in sedimentation basin forms press filtration sludge and press filtration water, press filtration water is defeated by filter-pressing device press filtration It is sent in burnt lime digester and is used as digestion water or is sent into stirring pool, press filtration sludge is transported to ash cellar or stirring by broken In pond or it is delivered in burnt lime digester.
It is preferred that dusty gas is transported to chimney by exhaust fan by deduster treated purification gas and carries out in step Outer row.
It is preferred that being additionally provided with final dusting device and moisture collection device in the chimney.
It is preferred that the cleaning device cleans whole equipment, it is preferred that collected sewage importing is stirred after cleaning It mixes in pond.Whole equipment includes stirring pool, blender, sedimentation basin, clear water reserviors, clarified water pump, fresh water pipeline, filter-pressing device, exhausting Machine, deduster, steel-smelting sewage sludge, sludge pump, burnt lime digester or pipeline, optional other equipment.
It is preferred that the top of stirring pool is equipped with blender.
It is preferred that steel-smelting sewage sludge is transported to by sludge pump in burnt lime digester.
It is preferred that external moisturizing is optionally transported to burnt lime digester, deduster or clear water reserviors by moisturizing pipeline.As It is preferred that external moisturizing is transported to exhaust fan by moisturizing pipeline, for cleaning exhaust fan.
It is preferred that being equipped with ball-cock assembly in clear water reserviors, rate of water make-up is controlled, dynamic of water balance in holding system.
In the present invention, the cleaning of pipeline and equipment：The main component of limeslaker dust is CaO, Ca (OH)2And water Steam, this dust caking property in the environment of high temperature, moistening is very strong, will be bonded in when dusty gas passes through cleaning shaft Inner wall of the pipe gradually thickeies until blocking, and the time that dedusting pipeline can be kept unimpeded under normal circumstances was less than one month.It is anti- Only cleaning shaft blocks, and needs to clean pipeline in time, cleaning device is designed on pipeline.Line clogging in order to prevent, Dedusting circuit design should reduce horizontal pipe to the greatest extent and shorten pipeline distance, and consider that the installation site of cleaning device and maintenance are flat Platform.Wet dust collector purified gas still contains a small amount of lime dust and a large amount of water vapour, and the gas of moistening is easy to make At fan blade dust accumulation and fouling, it will appear local shedding after blade dust accumulation reaches certain thickness, impeller balance caused to destroy, Wind turbine vibrates.In order to solve the above-mentioned frequent problem, ash removing opening, periodic cleaning wind turbine leaf are opened up on fan casing The dust accumulation of wheel；And cleaning device is installed before air inlet, long-term spray cleans the dust accumulation on fan blade in time, it is ensured that leaf The balance of wheel.
The present invention can solve completely existing digester digestive efficiency is low, dust collector efficiency is low, the blocking of cleaning shaft, wind A series of problems, such as vibration of machine, sewage sludge recycle, it is ensured that dust pelletizing system can be run steadily in the long term.Quicklime slaking Rate is very high, dust, steam collecting effect can also reach 99% or more, after purification the concentration of emission of exhaust gas dust much smaller than country Defined discharge standard also realizes energy-saving and environment-friendly purpose.
In the present invention, the dust that burnt lime digester is collected can also be passed through dust removing tube together with the dedusting of other points Dust-extraction unit is sent into road.
The application method of two-stage burnt lime digester, this approach includes the following steps：
(1) quicklime slaking：Quick lime is put into the feed inlet of two-stage burnt lime digester, via sealing transportation section Babinet is transported in the first digestion section babinet；
(2) it is moved into the first digestion section babinet by the water injector positioned at the top of the first digestion section babinet or side Quick lime material spray water so that quick lime is mixed and digests while moving under the stirring action of agitating shaft；
(3) after enter second digestion section babinet in occur while moving under the stirring action of agitating shaft again into One step mixes and digestion, and postdigestive quick lime is discharged via the discharge port of burnt lime digester bottom.
Preferably, the first agitating shaft with stirring blade equipped with a pair in the first digestion section babinet, this pair First agitating shaft, the two is driven by first driving means and the direction of rotation of the two is opposite.
Preferably, the second agitating shaft with stirring blade equipped with a pair in the second digestion section babinet, this is a pair of The second agitating shaft, the two is driven by the second driving device and the direction of rotation of the two is opposite.
Preferably, the second agitating shaft, in the middle one is located at the first agitating shaft, one underface in the middle, and They are opposite with the direction of rotation of the two.
Preferably, the input terminal of water injector and initial water supply line L are external, output end is by automating flowmeter water Valve is connect with multiple telescopic sprinkler heads positioned at the top of the first digestion section housing interior volume；Preferably, it automates Flowmeter water valve is electrically connected to carry out automation control to water and has cutting function with Master Control Room；Further preferred It is that multiple scalable sprinkler heads carry out flexible adjustment, length arrangement straggly according to the length of digestion section babinet.
Preferably, the initial water supply line of water injector is connected to the hot water outlet of external heat exchanger X, the heat exchanger X has the cooling gas outlet after cooling water inlet X and hot water outlet and the heat gas import X of heat and heat exchange.
Compared with prior art, the present invention has following advantageous effects：
1, compared with single-stage digests, digestibility increases by 1 to 2 times, and digestible degree is high, the digestion process parameter of science, maximum Change keeps quicklime slaking complete.In digestion process, heat loss is smaller, i.e. the amplitude of temperature drop is relatively low.Dust is apparent in exhaust gas It reduces, reduces the burden of follow-up dedusting.The power of stirring is shared by multiple agitating shafts, reduces the abrasion of driving equipment.
2, seal transportation section babinet in part be equipped with continuous conveyor screw blade, seal transportation section babinet inner wall with Helixseal conveying is formed between continuous conveyor screw blade, and quick lime is only allowed to push ahead into digestion section babinet, it can It effectively prevent steam anti-channeling to feeding mouth to cause hardened or influence belt conveyer scale weighing accuracy.
3, using Double shaft stirring form, have effects that stirring, crush the multiple actions such as caking and self-cleaning and；Improve raw stone Grey stirring frequency makes quick lime be uniformly mixed with water, react abundant；Stirrer paddle welds carbide bit using manganese steel plate, Prolong the service life.
4, it is digested as a result of multistage, also the automation control of water so that digestion effect is fine, the dust of generation Also it accordingly largely reduces, substantially improves the external environment in digestion place, digestion region dust concentration is far below national emission Concentration standard has administered the problem of environmental pollution of existing digestion zone.
5, it is directed to multistage digester level-one and digests section maintenance blind spot below, provide a kind of effective expansion maintenance side Method solves multistage digester maintenance problem.
The present invention is fully solved the low problem and a large amount of dust flue gas with digestion effect difference of existing digester digestive efficiency The problems such as pollution.
In addition, the deduster of the present invention produces the advantage that：
1, the present invention is by adjusting water level regulation equipment, it is ensured that the suitable immersion depth (such as 50cm-80cm) of fume pipe, Pass through the synergistic effect of the nozzle of reticular structure or porous structure and water level regulation equipment so that the fluctuation of the pressure of flue gas obtains Buffering.The size of produced bubble is smaller and uniform.Realize coming into full contact with for flue gas containing dust and water, good dedusting effect.
2, gather impulse type water bath dedusting technology and filtering type moisture film dedusting technology advantage, targetedly capture big Grain and fine dust, efficiency of dust collection are up to 99.9%.
3, water level in deduster can be adjusted when equipment is run, and reach higher purification efficiency, while ensureing purifier Running resistance is relatively low, and equipment energy consumption is low.
4, using overflow water seal, the fluctuation range of liquid level in purifier cylinder is controlled well, ensures purifier Protective effect is played with stable purification efficiency, and to wind turbine.
5, dedusting sewage can again recycle after sewage disposal, reduce sewage discharge capacity, prevent secondary pollution.
6, the configuration of the present invention is simple operates, is easy to maintenance.
The present invention efficiently solves the problems, such as that quicklime slaking dust removing effects are poor, and to solve existing quicklime slaking big Measure dust flue gas problem of environmental pollution.
Description of the drawings
Fig. 1 is the flow diagram of the quicklime slaking and dust pelletizing system of the present invention.
Fig. 2 is the structural schematic diagram of (upper and lower) two-stage digester of the invention.
Fig. 2 a are the sheet for the hot water outlet that the initial water supply line L0 of wherein water injector 5 is connected to external heat exchanger X4 Invent the structural schematic diagram of (upper and lower) two-stage digester.
Fig. 3 is the overlooking structure diagram of digester shown in Fig. 2 of the present invention.
Fig. 4 is the left view schematic diagram of digester shown in Fig. 2 of the present invention.
Fig. 5 is the structural schematic diagram of (upper and lower) three-level digester of the invention.
Fig. 6 is the structural schematic diagram of the quicklime slaking of the present invention and the wet dust collector of dust pelletizing system.
Fig. 7 is the structural schematic diagram that wet dust collector of the present invention is equipped with control system.
Fig. 8 is a kind of efficient quicklime slaking of the present invention and dust pelletizing system schematic diagram；
Fig. 9 is the present invention another efficiently quicklime slaking and dust pelletizing system schematic diagram.
Reference numeral：
In Fig. 1, Q- quick limes；A or 1- digesters (or slaking apparatus)；B or Q1- dedusters (or dust-extraction unit)；C- takes out Wind turbine；D- chimneys；E- sewage-treatment plants；E1- stirring pools；E2- sedimentation basins；E3- clear water reserviors；E11- blenders；F1- sewage Pump；F2- clarified water pumps；K- cleaning devices；Other dedustings of J-；L1- water-mains road；L2- fresh water pipelines；The initial water supply lines of L0-； H- steel-smelting sewage sludges；G- sludge pumps.
In Fig. 2-5,1：Burnt lime digester；2- feed inlets；201- self seal valves；3- seals transportation section babinet；301- Conveyor screw blade；4- first digests section babinet；Bed in the first beds of 4a- or the first digestion section babinet；401a and 401b- First agitating shaft；402- stirring blades；5- water injectors；501- automates flowmeter water valve；The scalable sprinkler heads of 502-；6- is close Seal dust excluding hood；601- gathers dust external tapping；7- first (on) digest at babinet blanking and disclose material mouth；7a- second (in) digestion babinet At blanking and disclose material mouth；8- second digests section babinet；Bed in the second beds of 8a- or the second digestion section babinet；801a and The second agitating shafts of 801b-；9- discharge ports；10- digests babinet apparatus for examination and repair；10a- digests babinet apparatus for examination and repair door；10b digests case Device gate articulating device is repaiied in physical examination；11- first driving means；11a- first shaft couplings；11b- first gear casees；11c- One bearing block；The second driving devices of 12-；12a- second shaft couplings；12b- second gear casees；12c- second bearing seats；13- thirds Driving device；13a- third shaft couplings；13b- third gear-boxes；13c- 3rd bearing seats；14- thirds digest section babinet；14a- Bed in third bed or third digestion section babinet；1401a and 1401b- third agitating shafts (to)；The initial water supply lines of L0-； X4- heat-exchange devices；X5- cold water；X6- heat gas (such as ring cold machine hot wind).
In Fig. 6 and Fig. 7, Q1：Deduster；Q2：Dedusting pond；Q201：Water supply pipe；Q202：Moisturizing pipe valve；Q203：Sewage Device for discharging sludge；Q204：Hydraulic gage；Q3：Shell of dust remover；Q301：Water level regulation hole；Q302：Card puts slot；Q303：Headroom Gas exports；Q4：Cleaning shaft；Q 401：Liquid down tube channel showerhead；Q5：Overflow water seal water pond；Q501：Cover board；Q502：Overflow pipe； Q503：Overflow pipe valve；Q6：Water level control apparatus；Q601：Water level regulation plate；Q602：Screw rod；Q603：Regulating valve；Q7：Branch Frame；Q701：First group of woven wire；Q702：Second group of woven wire；Q703：Sealing card；Q8：Sprinkler head；Q9：Water blocking demisting Plate；Q10：Control system.
In Fig. 8 and Fig. 9, A1：Extractor fan；A2：Chimney；A3：Dusting waste water treatment device；A4：Sludge treatment equipment； A5：Cleaning device；A6：Slaked lime conveying device；A7：Batch mixer.
Specific implementation mode
According to the first embodiment of the present invention, two-stage burnt lime digester 1 is provided, it includes：Feed inlet 2, front end The sealing transportation section babinet 3 being connected with feed inlet 2, the first digestion section case being connected with the rear end of sealing transportation section babinet 3 Body 4 is located at the top of the first digestion section babinet 4 or the water injector 5 of side；Sealing positioned at 4 top of the first digestion section babinet Dust excluding hood 6 in the first digestion section babinet 4 and at the upper digestion babinet blanking of that one end far from feed inlet 2 and discloses material mouth 7, it is located at the second digestion section babinet 8 of 4 lower section of the first digestion section babinet, is located in the second digestion section babinet 8 and close to feed inlet 2 That one end discharge port 9；Wherein：Equipped with a pair of the first stirring with stirring blade 402 in the first digestion section babinet 4 Axis 401a and 401b, this pair of both first agitating shaft 401a and 401b pass through 11 drivings of first driving means and the two Direction of rotation it is opposite；In addition, equipped with a pair of the second agitating shaft 801a with stirring blade in the second digestion section babinet 8 And 801b, this pair of both second agitating shaft 801a and 801b pass through 12 drivings of the second driving device and the rotation of the two Direction is opposite；With sealing dust excluding hood 6, which has, to gather dust external tapping 601.
According to the second embodiment of the present invention, three-level burnt lime digester 1 is provided, it includes：Feed inlet 2, front end The sealing transportation section babinet 3 being connected with feed inlet 2, the first digestion section case being connected with the rear end of sealing transportation section babinet 3 Body 4 is located at the top of the first digestion section babinet 4 or the water injector 5 of side；Sealing positioned at 4 top of the first digestion section babinet Dust excluding hood 6 in the first digestion section babinet 4 and at the upper digestion babinet blanking of that one end far from feed inlet 2 and discloses material mouth 7, it is located at the second digestion section babinet 8 of 4 lower section of the first digestion section babinet, is located in the second digestion section babinet 8 and close to feed inlet 2 That one end the second digestion babinet blanking at and disclose material mouth (i.e. discharge port) 7a, the be located at below the second digestion section babinet 8 Three digestion section babinets 14 are located at the discharge port 9 of 14 that one end interior and far from feed inlet 2 of third digestion section babinet；Wherein： It is stirred equipped with a pair of the first agitating shaft 401a and 401b with stirring blade 402, the first of this pair in one digestion section babinet 4 The direction of rotation that both axis 401a and 401b are mixed by 11 drivings of first driving means and the two is opposite；Section is digested second Equipped with a pair of the second agitating shaft 801a and 801b with stirring blade in babinet 8, this second a pair of agitating shaft 801a with Both 801b are opposite by the direction of rotation of 12 drivings of the second driving device and the two；It is built-in in third digestion section babinet 14 There is a pair of third agitating shaft 1401a and 1401b with stirring blade, this pair of third agitating shaft 1401a and 1401b two Person is opposite by the direction of rotation of 13 drivings of third driving device and the two；With sealing dust excluding hood 6, which has, to gather dust external tapping 601。
In above-mentioned two embodiment, it is preferable that a 801a in the second agitating shaft 801a and 801b is located at first The underface of a 401a in agitating shaft 401a and 401b, and the direction of rotation of both their 401a and 801a is opposite.
Further preferably, a 801a in the second agitating shaft 801a and 801b is located at the first agitating shaft 401a and 401b The underface of a 401a in the middle, and the direction of rotation of both their 401a and 801a is on the contrary, with third agitating shaft 1401a It is located at the underface of a 801a in the second agitating shaft 801a and 801b, and they with a 1401a in 1401b The direction of rotation of both 401a and 801a is opposite.
It is preferred that the input terminal of water injector 5 and initial water supply line L0 are external, output end is by automating flowmeter water valve 501 connect with multiple telescopic sprinkler heads 502 on the top positioned at 4 inner space of the first digestion section babinet；Preferably, certainly Dynamicization flowmeter water valve 501 is electrically connected to carry out automation control to water and has cutting function with Master Control Room；Further Preferably, multiple scalable sprinkler heads 502 carry out flexible adjustment, length arrangement straggly according to the length of digestion section babinet.
In addition, the initial water supply line L0 of water injector 5 is connected to the hot water outlet of external heat exchanger X4.The heat exchanger X4 has the cooling gas outlet after cooling water inlet X5 and hot water outlet and the heat gas import X6 of heat and heat exchange.Such as Fig. 2 a Shown in.
It is preferred that the height of the sealing dust excluding hood 6 set by being digested above section babinet 4 first is defeated along the material of the babinet 4 Direction is sent to gradually increase, the external tapping 601 that gathers dust is located at the end of dust excluding hood 6, passes through gather dust external tapping 601 and the extraneous dedusting Device or the pipeline of dust pelletizing system are connected.
It is preferred that being additionally provided with digestion babinet maintenance on the babinet of two-stage burnt lime digester 1 or three-level burnt lime digester 1 Device 10, the apparatus for examination and repair 10 include one or more digestion babinet apparatus for examination and repair door 10a and one or more digestion babinet inspections It repaiies device gate activity and connects mechanism 10b；Preferably, one or more digestion babinet apparatus for examination and repair door moving connecting mechanism 10b quilts It is installed in mounted on the bottom of the second babinet or simultaneously the second babinet and the respective bottom of third babinet, digestion babinet maintenance dress The bottom for setting a 10a is connect with digestion babinet apparatus for examination and repair door moving connecting mechanism 10b, and door 10a can be around the moving connecting mechanism 10b is rotated, and the top of digestion babinet apparatus for examination and repair door 10a is snapped connection with lower box top, i.e., this top can beat Push And Release It closes,
In this application, the also referred to as upper and lower two-stage digester of two-stage digester, three-level digester also referred to as upper and lower three Grade digester.
According to the third embodiment the present invention, quicklime slaking and dust-extraction unit are provided, it includes any of the above described one The digester 1 and wet dust collector Q1, the latter of kind are connected by a cleaning shaft Q4 with the external tapping 601 that gathers dust of digester 1 It is logical；
Wherein wet dust collector Q1 includes：
Dedusting pond Q2；
Shell of dust remover Q3 above the Q2 of dedusting pond；
Cleaning shaft Q4,
It is characterized in that：One end of cleaning shaft Q4 is external to the output end of one or more collection devices containing dusty gas (such as dedusting interface of limeslaker), the other end pass through shell of dust remover Q3 and stretch under shell of dust remover Q3 from top to bottom In the dedusting pond Q2 of side, one end that cleaning shaft Q4 is stretched into the Q2 of dedusting pond is provided with liquid down tube channel showerhead Q401, wherein The end of liquid down tube channel showerhead Q401 is reticular structure or porous structure；Preferably, cleaning shaft Q4 is from shell of dust remover Q3 Middle part pass through.
It is preferred that deduster Q1 further includes：Overflow water seal water pond Q5 positioned at the dedusting pond sides Q2, and in water in dust removal Between pond Q2 and overflow water seal water pond Q5, in the water level regulation hole Q301 that the lower end of the sides shell of dust remover Q3 is issued；It is more excellent Choosing is equipped with to block on the outside of the shell of dust remover Q3 by the Q301 of water level regulation hole and puts slot Q302 and water level control apparatus Q6, should Water level control apparatus Q6 includes water level regulation plate Q601, screw rod Q602, regulating valve Q603, and water level regulation plate Q601 cards are placed on institute It states card to put in slot Q302, one end of screw rod Q602 is connect with water level regulation plate Q601, the other end of screw rod Q602 and adjusting Valve Q603 connections, the wherein vertical width of water level regulation plate Q601 are slightly larger than the vertical width of water level regulation hole Q301.
It is preferred that deduster Q1 further includes：Cover board Q501 above overflow water seal water pond Q5 is set, the one of cover board Q501 End is connect with shell of dust remover Q3, and the other end is inserted into overflow water seal water pond Q2；It is further preferred that there are one being opened on cover board Q501 Through-hole, screw rod Q602 pass through the through-hole.Screw rod Q602 is set to be moved down on the through-hole by the effect of regulating valve Q603 It is dynamic, therefore water level regulation plate Q601 is driven to move up and down.
It is preferred that the overflow water seal water pond tops Q5 are provided with overflow pipe Q502, for adjusting the water level in overflow water seal water pond； It is further preferred that overflow pipe Q502 is equipped with overflow pipe valve Q503.
It is preferred that be provided with water supply pipe Q201 on the Q2 of dedusting pond, for supplement water in dedusting pond；Preferably, Moisturizing water pipe Q201 is equipped with moisturizing pipe valve Q202.
It is preferred that the dedusting pond bottoms Q2 are funnel-form or " V " type or are rendered as inversed-cone shape, the dedusting pond bottoms Q2 are set There is sewage sludge tapping equipment Q203；It is further preferred that being additionally provided with hydraulic gage Q204 in sewage sludge tapping equipment Q203.
It is preferred that being provided with holder Q7 above dedusting pond Q2 in shell of dust remover Q3, it is provided with below holder Q7 First group of woven wire Q701 (preferably V-type filter screen or V-type woven wire) a little is punctured as bubble and on holder Q7 Side is provided with second group of woven wire Q702 (preferably reverse V-shaped woven wire)；Preferably, first group of woven wire Q701 And/or second group of woven wire Q702 alternating inclinations arrangement, point of intersection are provided with sealing card Q703.
It is preferred that being provided with sprinkler head Q8 above second group of woven wire Q702, it is used for second group of woven wire Q702 Upper sprinkling water in dust removal or dedusting liquid；Preferably, water blocking demisting plate Q9 is provided with above sprinkler head Q8, in water blocking demisting plate Q9 Net air outlet Q303 is provided on the shell of dust remover of top.
It is preferred that deduster Q1 further includes control system Q10, hydraulic gage Q204, overflow pipe valve Q503 and moisturizing pipe valve Q202 It is connect with control system Q10, control system Q10 control hydraulic gages Q204, overflow pipe valve Q503 and moisturizing pipe valve Q202.
Wet dust collector described herein can be mounted or positioned on pedestal, or be supported on support bracket.One As, cylindrical shape or oval cylinder is presented in the shell side of wet dust collector, i.e. the shell side cross sectional of wet dust collector is circle Shape or ellipse.Also it can be rendered as four prism type, i.e. the shell side cross sectional of wet dust collector is rectangle or square.Water The body height (height of i.e. entire shell) for bathing deduster is usually 1.2m-10m, preferably 1.5-7m, more preferable 2.0-5m.
According to another aspect of the present invention, provide it is a kind of using include two-stage burnt lime digester above-mentioned digestion with The quicklime slaking and dust removal method of dust-extraction unit, this approach includes the following steps：
1) quicklime slaking：Quick lime is put into the feed inlet 2 of two-stage burnt lime digester 1, is conveyed via sealing Section babinet 3 is transported in the first digestion section babinet 4, is filled by the water spray positioned at the top of the first digestion section babinet 4 or side The quick lime material water spray that 5 move into the first digestion section babinet 4 is set so that quick lime is one under the stirring action of agitating shaft Side movement is mixed and digests on one side, enters later in the second digestion section babinet 8 again one under the stirring action of agitating shaft Side movement on one side occur further mixing and digestion, postdigestive quick lime via 1 bottom of burnt lime digester 9 row of discharge port Go out；With
2) dedusting of dusty gas：Sealing gather dust external tapping of the dusty gas in dust excluding hood 6 from sealing dust excluding hood 6 601 are output to the cleaning shaft Q4 of wet dust collector Q1, the liquid down tube channel showerhead Q401 that dusty gas passes through cleaning shaft Q4 It is injected into the water of dedusting pond Q2, is dusted by being contacted with water, what the gas after dedusting was arranged from shell of dust remover Net air outlet Q303 is discharged.
According to a further aspect of the invention, provide it is a kind of using include three-level burnt lime digester above-mentioned digestion with The quicklime slaking and dust removal method of dust-extraction unit, this approach includes the following steps：
1) quicklime slaking：Quick lime is put into the feed inlet 2 of three-level burnt lime digester 1, is conveyed via sealing Section babinet 3 is transported in the first digestion section babinet 4, is filled by the water spray positioned at the top of the first digestion section babinet 4 or side The quick lime material water spray that 5 move into the first digestion section babinet 4 is set so that quick lime is one under the stirring action of agitating shaft Side movement is mixed and digests on one side, enters later in the second digestion section babinet 8 again one under the stirring action of agitating shaft Further mixing and digestion occur on one side for side movement, enter later in third digestion section babinet 14 and make again in the stirring of agitating shaft Occur further to mix and digest while moving with lower, postdigestive quick lime goes out via 1 bottom of burnt lime digester Material mouth 9 is discharged；With
2) dedusting of dusty gas：Sealing gather dust external tapping of the dusty gas in dust excluding hood 6 from sealing dust excluding hood 6 601 are output to the cleaning shaft Q4 of wet dust collector Q1, the liquid down tube channel showerhead Q401 that dusty gas passes through cleaning shaft Q4 It is injected into the water of dedusting pond Q2, is dusted by being contacted with water, what the gas after dedusting was arranged from shell of dust remover Net air outlet Q303 is discharged.
Below with reference to the accompanying drawings, by taking two-stage digester as an example, the specific implementation mode of the present invention is more specifically described.
With reference to figure 1, this digestion and dust pelletizing system include slaking apparatus A, using multistage digester 1, by quick lime Q and are led to It crosses the steel-smelting sewage sludge H that sludge pump G conveying comes to be added in slaking apparatus A, then by initial water supply line L0 to slaking apparatus In plus water, carry out digestion operation.Limeslaker dust is mainly in digestion process plus water generates a large amount of water vapours and lime Dust collects these dust and needs digester top is closed and directly pass through suction on closed good digester exhaust outlet The external cleaning shaft of dust hood.The dust that digester is collected is sent into dust-extraction unit B together with other dedusting J by cleaning shaft (i.e. deduster Q1).
With reference to 2~Fig. 4 of figure, the slaking apparatus A of this system is two-stage digester 1, including upper and lower box, upper box are divided into phase The the first digestion section babinet 4 and sealing transportation section babinet 3 of connection, it is parallel in the first digestion section babinet 4 to be respectively arranged with two By the first agitating shaft 401a and 401b of power plant driving, two agitating shafts 401a and 401b are rotated synchronously and direction of rotation phase Instead, which includes first driving means 11, and first driving means 11 are connected with first gear by first shaft coupling 11a Case 11b, two agitating shafts 401a and 401b in first bearing seat 11c and the first gear case 11b respectively by being intermeshed A pair of of gear be connected, to realize that synchronous backward rotates, first bearing seat 11c is located at except babinet 4, and use fission is set Meter, bearing working environment is good, and service life is long；Two stirring rod 401a and 401b are located at the part in the first digestion section babinet 4 Stirring blade 402 equipped with several dispersions, interlaced setting (Fig. 2 of stirring blade 402 on two agitating shafts 401a and 401b In merely illustrate an agitating shaft 401 and its stirring blade 402), two agitating shafts 401a and 401b are located at sealing transportation section case Part in body 3 is equipped with conveyor screw blade 301, and feed inlet 2 is equipped on the top of sealing transportation section babinet 3, feed inlet 2 with it is close The junction of envelope transportation section babinet 3 is provided with self seal valve 201, the first digestion of discharge port connection of sealing transportation section babinet 3 The head end feeding mouth of section babinet 4；It is provided at upper digestion babinet blanking and discloses material in the tail end discharge port of the first digestion section babinet 4 Mouth 7, material are disappeared by the upper head end for digesting at babinet blanking and disclosing material mouth 7 and enter the digestion section of lower box second babinet 8 second It is also parallel in change section babinet 8 to be respectively arranged with two the second agitating shaft 801a and 801b driven by power plant, two stirrings Axis 801a and 801b are also rotated synchronously and direction of rotation is on the contrary, the power plant includes the second driving device 12, and the second driving fills It sets 12 second gear case 12b, two agitating shafts 801a and 801b is connected with by second shaft coupling 12a and pass through second bearing respectively Seat 12c is connected with intermeshing a pair of gear in the second gear case 12b, to realize that synchronous backward rotates, and the The steering of two driving devices 12 is opposite with the steering of first driving means 11；Two agitating shafts 801a and 801b are located at the second digestion Part in section babinet 8 also is provided with the stirring blade of several dispersions, and the stirring blade on two agitating shafts 801a and 801b is mutual It is staggered, the tail end of the second digestion section babinet 8 is provided with discharge port 9, digestion case is additionally provided on two-stage digester babinet Body apparatus for examination and repair 10, including digestion babinet apparatus for examination and repair door 10a and digestion babinet apparatus for examination and repair door activity connect mechanism 10b, digest Babinet apparatus for examination and repair door moving connecting mechanism 10b is mounted on lower box bottom, the digestion babinet apparatus for examination and repair bottoms door 10a and digestion Babinet apparatus for examination and repair door moving connecting mechanism 10b connections, door can be rotated around moving connecting mechanism 10b, digestion babinet maintenance dress It sets the tops 10a to snap connection with lower box top, i.e., this top can open and close, and when maintenance, open digestion babinet inspection It repaiies device gate 10a to be overhauled, the apparatus for examination and repair generally expansion greatly facilitates the maintenance of digester.In the first digestion 4 top of section babinet is additionally provided with sealing dust excluding hood 6, and the height of dust excluding hood 6 is gradually increased along material conveying direction, in dust excluding hood 6 End be additionally provided with the external tapping 601 that gathers dust, connect with extraneous dust pelletizing system pipeline by the external tapping 601 that gathers dust.In upper box On be additionally provided with water injector 5,5 one end of water injector and initial water supply line L0 are external, the other end pass through automate flowmeter Water valve 501 is connect with several scalable sprinkler heads 502, and automation flowmeter water valve 501 is electrically connected with Master Control Room carries out water Automation control simultaneously there is cutting function, several scalable sprinkler heads 502 to stretch into 4 top dust excluding hood 6 of the first digestion section babinet Shower water is carried out to material, several scalable sprinkler heads 502 can carry out flexible adjustment, length mistake according to the length of digestion section babinet Fall arrangement so that add water evenly, add water area wider, water also obtains automation control.
The slaking apparatus has the following advantages：1, compared with single-stage digests, digestibility increases by 1 to 2 times, and digestible degree is high, section Digestion process parameter, maximization keep quicklime slaking complete.2, the part in the babinet of transportation section is sealed equipped with continuous defeated Square auger blade seals formation helixseal conveying between the inner wall and continuous conveyor screw blade of transportation section babinet, only permits Perhaps quick lime is pushed ahead into digestion section babinet, and steam anti-channeling to feeding mouth can be effectively prevent to cause hardened or influence belt conveyer scale Weighing accuracy.3, using Double shaft stirring form, have effects that stirring, crush the multiple actions such as caking and self-cleaning and；Improve life Lime under agitation frequency makes quick lime be uniformly mixed with water, react abundant；Stirrer paddle welds carbide cutter tool using manganese steel plate Head prolongs the service life.4, it is digested as a result of multistage, also the automation control of water so that digestion effect is fine, production Raw dust also accordingly largely reduces, and substantially improves the external environment in digestion place, and digestion region dust concentration is far below state Family's emissions concentration standard, has administered the problem of environmental pollution of existing digestion zone.5, be directed to multistage digester level-one digestion section with Under maintenance blind spot, provide a kind of effective expansion repair method, solve multistage digester maintenance problem.
Quicklime slaking smoke characteristic：1, strong cohesive property and hydrophily, according to test, the fracture strength of CaO is more than 600Pa, It is strong cohesive property and strongly hydrophilic dust, is easy to caking or is adhered on the inner wall of deduster and its pipeline；2, polymolecularity, The chemical reaction of quick lime and water is violent exothermic reaction, the Ca (OH) of generation2The granularity of colloidal solid is superfine, average grain diameter It it is 30 μm, therefore, quick lime dust is easily diffused with thermal current and come in digestion process, and natural subsidence is very slow, diffusion Range is wide, and dust catching difficulty is big；3, the hydraulicity, quick lime add water digestion to generate Ca (OH)2, dispersion in air can be further Water suction and CO2Reaction generates CaCO3Precipitation, works as CaCO3Amount accumulation to a certain extent after, hard scale will be formed and hardened.It is raw Lime slaking smoke characteristic not only results in quick lime and is adhered to cleaning shaft, and pipeline, but also heavy corrosion are blocked after hardened The pole plate of electric precipitator influences its normal operation.When using sack cleaner, also can because the hydraulicity cause cloth bag paste quickly it is stifled due to It is forced to deactivate.
With reference to figure 1, the characteristics of for quicklime slaking flue gas, this system dust-extraction unit B (i.e. Q1) uses water bath dust-removing side Formula, this cleaner are to purify dress in the novel combination type of one using water-bath washing dust removal mechanism and filtering type purification techniques It sets, efficiency of dust collection is very high.
As shown in Figure 2 and Figure 6, will be disappeared by cleaning shaft from the dedusting interface 601 of burnt lime digester 1 (i.e. A) first Change institute in ash-laden gas (via cleaning shaft Q4 shown in Fig. 6) access efficient quicklime slaking wet dust collector B, i.e. Fig. 6 The Q1 shown.Efficiently quicklime slaking wet dust collector Q1 includes the external limeslaker dedusting interface 601 in one end, other end company for this The cleaning shaft Q4 being connected to inside deduster Q1, cleaning shaft Q4 enter across shell of dust remover Q3 in deduster Q1, dust removing tube It is reticular structure or porous knot that Q4 stretch into deduster Q1 one in road, which is provided with liquid down tube channel showerhead Q401, nozzle Q401, Structure, the nozzle extend into shell Q3 certain position (such as depth 20-80cm), pipeline nozzle Q401d in the Q2 of dedusting pond Purpose is cutting bubble, increases contact of the flue gas with water, improves efficiency of dust collection；In dedusting pond, Q2 is issued mono- lower ends side body Q3 There are water level regulation hole Q301, the hull outside by trepanning Q301 to be provided with card and put slot Q302, water level regulation plate Q601 cards are placed on The card is put in slot Q302, and shelters from the water level regulation hole Q301, and adjustable plate Q601 can be adjusted by up and down The area and height for blocking water level regulation hole Q301 are provided with overflow water seal water pond Q5, overflow water seal on the outside of adjustable plate Q601 The pond tops Q5 are provided with overflow pipe Q502, for adjusting the water level in overflow water seal water pond Q5；In dedusting pond, Q2's is another The top of side is provided with water inlet pipe Q201 and inlet valve Q202, for supplementing the water in dedusting pond, in the overflow water seal Seal cover board Q501 is provided with above the Q5 of pond, seal cover board Q501 covers part or all of overflow water seal water pond Q5, protects Water level and steady air current are demonstrate,proved, the funnel-shaped bottom portion of Q2 is provided with sewage sludge tapping equipment Q203 in dedusting pond, clear shutting down Clear mud hole Q204 is opened when managing equipment will contain the discharge of dirt water；It is provided with holder Q7 above the Q2 of dedusting pond in shell Q3, It is provided with below holder Q7 and punctures one group of woven wire Q701 (being preferably V-type filter screen) a little as bubble, on holder Q7 Side is provided with woven wire Q702 (preferably reverse V-shaped woven wire), the arrangement of woven wire Q701 and Q702 alternating inclinations, intersection point Place is provided with sealing card Q703, sprinkler head Q8 is provided with above woven wire Q702, for being sprayed on woven wire Q702 Dedusting liquid, forms the moisture film to flow downward on filter screen Q701 and Q702, and upper and lower two groups of V-types net Q701 and Q702 form twice Water filtration membrane is crossed, dust is fully captured；It is provided with water blocking demisting plate Q9 above sprinkler head Q8, is arranged above water blocking demisting plate Q9 There is net air to export Q303.
The dust flue gas fetched from burnt lime digester dust removal port is entered by cleaning shaft in deduster, and cleaning shaft is inserted Enter certain position in dedusting pond, which is determined by exhaust gas volumn, and cleaning shaft is inserted into underwater one and is provided with netted knot The pipeline nozzle of structure；Dusty gas with certain speed at nozzle into cleaning shaft with fair speed through being sprayed, to water layer Enter in water after generating percussion, the direction of motion of gas changes, and grit then continues due to the effect of inertia by original side To movement, stayed in water after wherein most grit and water adhesion, netted knot of the bubble through nozzle that smoke-shock water body generates Structure cuts into minute bubbles, increases the contact area of bubble and water, strengthens capture of the water in dust removal to dust, realizes first order punching Hit formula water bath dust-removing；By water bath dust-removing, most of dust is removed in flue gas, and remainder particle dust passes through two layers of V Type net, the moisture film formed in net capture the fine dust in flue gas, second level filtering type water film dedusting are realized, after purification Gas through water blocking demisting processing after from exit be discharged.
It is had the following advantages compared with traditional wet scrubber：1, impulse type water bath dedusting technology and filtering type have been gathered Water film dedusting technological merit targetedly captures bulky grain and fine dust, efficiency of dust collection is up to 99.9%.It 2, can be in equipment Water level in deduster is adjusted when operation, reaches higher purification efficiency, while ensureing that purifier running resistance is relatively low, equipment energy It consumes low.3, using overflow water seal, the fluctuation range of liquid level in purifier cylinder is controlled well, ensures that purifier has Stable purification efficiency, and protective effect is played to wind turbine.4, dedusting sewage can again recycle after sewage disposal, Sewage discharge capacity is reduced, secondary pollution is prevented.5, the configuration of the present invention is simple operates, is easy to maintenance.
With reference to figure 1, by dust-extraction unit Q1 (or B) treated purification gas, exhaust fan C is connected by ventilation shaft, Exhaust fan C connects chimney D again, and the flue gas after dedusting is discharged into air by exhaust fan by exhausting operation through chimney.In chimney It is also equipped with simple dust-extraction unit and moisture collection device again, to realize that outer air-discharging dustiness is up to state standards and moisture Collection recycling.
By dust-extraction unit Q1 (i.e. B) water bath dust-removing treated sewage, sewage-treatment plant is imported by sewage conduct E, sewage-treatment plant include stirring pool E1, sedimentation basin E2 and clear water reserviors E3, and blender E11 is equipped in stirring pool.Sewage Agitated pond flows to sedimentation basin, then flows to clear water reserviors.Water in stirring pool enters lime slaking device by sewage pump F1, carries out It recycles.And the water in clear water reserviors is transported to cleaning device K with clarified water pump F2 by fresh water pipeline L2, cleaning device is to entire Cleaning shaft is cleaned in system, and the sewage after cleaning is imported cesspool again, is recycled.Under normal circumstances, Deduster, wind turbine water consumption can be less than limeslaker digestion water consumption, it is necessary to by water inlet manifold road L1 to system into Row moisturizing, water inlet manifold road L1 external water sources, moisturizing point design is in clear water reserviors, and rate of water make-up is controlled using ball-cock assembly, maintainer Dynamic of water balance in system.
In order to which rationally using supplying water, equipment uses clean clear water with water, is mainly used for water bath dust-removing, wind turbine and part dedusting Pipeline cleaning and moisturizing etc., the sewage after use are immediately discharged to stirring pool through gutter.Pipeline cleaning uses clear water, by clear water Water in pond is squeezed into using water pump in pipeline again cleans pipeline, and the sewage after cleaning is most of to be removed through pipeline inflow water-bath Dirt device enters stirring pool together with dust waste water, recycles；The whereabouts of dust waste water is after blender stirs evenly in stirring pool Limeslaker or other water consumption points are squeezed into through water pump.
With reference to figure 1, after long-term operation, bottom, which can accumulate, sludge for stirring pool and sedimentation basin, and the sludge is from bottom of pond pipeline It is discharged into filter-pressing device M, dewatered sludge is passed through in burnt lime slaking device A by sludge after filter-pressing device press filtration, by drainage It is discharged into stirring pool again, real mud and sewage recycles.
The cleaning of pipeline and equipment：The main component of limeslaker dust is CaO, Ca (OH)2And water vapour, this powder Dirt caking property in the environment of high temperature, moistening is very strong, and inner wall of the pipe will be bonded in when dusty gas passes through cleaning shaft, by It gradually thickeies until blocking, the time that dedusting pipeline can be kept unimpeded under normal circumstances was less than one month.To prevent cleaning shaft It blocks, needs to clean pipeline in time, cleaning device is designed on pipeline.Line clogging in order to prevent, dedusting pipeline are set Meter should reduce horizontal pipe to the greatest extent and shorten pipeline distance, and consider the installation site and inspection platform of cleaning device.Water-bath removes Dirt device purified gas still contains a small amount of lime dust and a large amount of water vapour, and the gas of moistening is easy to cause fan blade Dust accumulation and fouling will appear local shedding after blade dust accumulation reaches certain thickness, cause impeller balance to destroy, wind turbine shakes It is dynamic.In order to solve the above-mentioned frequent problem, ash removing opening, the dust accumulation of periodic cleaning draught fan impeller are opened up on fan casing； And cleaning device is installed before air inlet, long-term spray cleans the dust accumulation on fan blade in time, it is ensured that the balance of impeller.
A kind of efficient quicklime slaking and dust pelletizing system, it includes digester 1, wet dust collector Q1, further includes exhausting dress Set A1, chimney A2, dusting waste water treatment device A3, sludge treatment equipment A4, cleaning device A5 and Slaked lime conveying device A6 and Batch mixer A7, wet dust collector Q1 are connected by a cleaning shaft Q4 with the external tapping 601 that gathers dust of digester 1；Calcium hydroxide Conveying device A6 is located at the discharge port 9 of digester (1), and batch mixer A7 is connect with Slaked lime conveying device A6, wet dust collector The net air outlet Q303 of Q1 connect by extractor fan A1 with chimney A2, the overflow pipe Q502 of wet dust collector Q1 and except dustiness Water treatment facilities A3 connections, the sewage sludge tapping equipment Q203 of the dedusting pond bottoms Q2 connect with sludge treatment equipment A4, remove Dustiness water treatment facilities A3 is connect with cleaning device A5, and optionally, dusting waste water treatment device A3 connects with sludge treatment equipment A4 It connects.
Preferably, sludge treatment equipment A4 includes press filtration water out and press filtration sludge outlet, press filtration water out and cleaning Device A5 connections, press filtration sludge outlet are connect with digester 1.
The application method of two-stage burnt lime digester, this approach includes the following steps：
(1) quicklime slaking：Quick lime is put into the feed inlet 2 of two-stage burnt lime digester 1, is conveyed via sealing Section babinet 3 is transported in the first digestion section babinet 4；
(2) by the water injector 5 positioned at the top of the first digestion section babinet 4 or side into the first digestion section babinet 4 The quick lime material of movement is sprayed water so that quick lime is mixed and disappears while moving under the stirring action of agitating shaft Change；
(3) enter after in the second digestion section babinet 8 again under the stirring action of agitating shaft while moving Further mixing and digestion, postdigestive quick lime are discharged via the discharge port 9 of 1 bottom of burnt lime digester.
Preferably, the first agitating shaft 401a in the first digestion section babinet 4 equipped with a pair of with stirring blade 402 with 401b, this pair of both first agitating shaft 401a and 401b pass through 11 drivings of first driving means and the rotation side of the two To opposite.
Preferably, the second agitating shaft 801a in the second digestion section babinet 8 equipped with a pair of with stirring blade with 801b, this pair of both second agitating shaft 801a and 801b pass through 12 drivings of the second driving device and the rotation side of the two To opposite.
Work as preferably, a 801a in the second agitating shaft 801a and 801b is located at the first agitating shaft 401a and 401b In a 401a underface, and the direction of rotation of both their 401a and 801a is opposite.
Preferably, the input terminal of water injector 5 and initial water supply line L0 are external, output end is by automating flowmeter Water valve 501 is connect with multiple telescopic sprinkler heads 502 on the top positioned at 4 inner space of the first digestion section babinet；Preferably It is that automation flowmeter water valve 501 is electrically connected to carry out automation control to water and has cutting function with Master Control Room；Into One step is preferably, and multiple scalable sprinkler heads 502 carry out flexible adjustment, length row straggly according to the length of digestion section babinet Cloth.
Preferably, the initial water supply line L0 of water injector 5 is connected to the hot water outlet of external heat exchanger X4, this is changed Hot device X4 has the cooling gas outlet after cooling water inlet X5 and hot water outlet and the heat gas import X6 of heat and heat exchange.
Embodiment 1
In the present embodiment, using including two-stage burnt lime digester 1 and deduster Q1 digestion and dust-extraction unit, wherein Each rotary shaft of the second level is identical as the direction of rotation of corresponding rotary shaft of surface.Theory needed for quicklime slaking Water is the 32wt% of quick lime weight.In the present embodiment, ensure that the amount of water spray accounts for quick lime weight in the rate of water spray 70wt%.
Quicklime slaking and dust removal method, this approach includes the following steps：
1) quicklime slaking：Quick lime is put into the feed inlet 2 of two-stage burnt lime digester 1, is conveyed via sealing Section babinet 3 is transported in the first digestion section babinet 4, is filled by the water spray positioned at the top of the first digestion section babinet 4 or side The quick lime material water spray that 5 move into the first digestion section babinet 4 is set so that quick lime is one under the stirring action of agitating shaft Side movement is mixed and digests on one side, enters later in the second digestion section babinet 8 again one under the stirring action of agitating shaft Side movement on one side occur further mixing and digestion, postdigestive quick lime via 1 bottom of burnt lime digester 9 row of discharge port Go out；With
2) dedusting of dusty gas：Sealing gather dust external tapping of the dusty gas in dust excluding hood 6 from sealing dust excluding hood 6 601 are output to the cleaning shaft Q4 of wet dust collector Q1, the liquid down tube channel showerhead Q401 that dusty gas passes through cleaning shaft Q4 It is injected into the water of dedusting pond Q2, is dusted by being contacted with water, what the gas after dedusting was arranged from shell of dust remover Net air outlet Q303 is discharged.
After continuously running 10 days, discharge port does not have blockage phenomenon.
The dust removing effects of deduster Q1 are higher than 99.5%.
In normal operating process, with identical 20 seconds time intervals from the discharge port 9 of 1 bottom of burnt lime digester Sampling is analyzed.
Embodiment 2
Repeat embodiment 1, using including two-stage burnt lime digester 1 digestion and dust-extraction unit, only the second level is every One rotary shaft is opposite with the direction of rotation of corresponding rotary shaft of surface.
After continuously running 10 days, discharge port does not have blockage phenomenon.
The dust removing effects of deduster Q1 are higher than 99.6%.
In normal operating process, with identical 20 seconds time intervals from the discharge port 9 of 1 bottom of burnt lime digester Sampling is analyzed.
Comparative example 1
The sintering plant of iron and steel enterprise in Hunan Province, is digested using single-stage digester, in normal operating process, It is analyzed from the sampling of the discharge port of burnt lime digester with identical 20 seconds time intervals.Discharge port has clogging, needs Take periodically (about 3 days) cleaning discharge ports.
Embodiment 3
A kind of efficient quicklime slaking and dust pelletizing system, it includes digester 1, wet dust collector Q1, further includes exhausting dress Set A1, chimney A2, dusting waste water treatment device A3, sludge treatment equipment A4, cleaning device A5 and Slaked lime conveying device A6 and Batch mixer A7, wet dust collector Q1 are connected by a cleaning shaft Q4 with the external tapping 601 that gathers dust of digester 1；Calcium hydroxide Conveying device A6 is located at the discharge port 9 of digester (1), and batch mixer A7 is connect with Slaked lime conveying device A6, wet dust collector The net air outlet Q303 of Q1 connect by extractor fan A1 with chimney A2, the overflow pipe Q502 of wet dust collector Q1 and except dustiness Water treatment facilities A3 connections, the sewage sludge tapping equipment Q203 of the dedusting pond bottoms Q2 connect with sludge treatment equipment A4, remove Dustiness water treatment facilities A3 is connect with cleaning device A5, and optionally, dusting waste water treatment device A3 connects with sludge treatment equipment A4 It connects.
Embodiment 4
Embodiment 3 is repeated, only sludge treatment equipment A4 includes press filtration water out and press filtration sludge outlet, press filtration water out It is connect with cleaning device A5, press filtration sludge outlet is connect with digester 1.
Test result：
The size distribution of the white lime obtained after digestion is measured using Malvern (Malvern) particle size analyzer for sample Index I, it is as a result as follows：
Sample time (second) Embodiment 1 Embodiment 2 Comparative example 1
0 1.49 1.30 1.73
20 1.45 1.25 2.3
40 1.38 1.20 2.5
60 1.46 1.36 1.89
80 1.48 1.33 2.3
100 1.40 1.35 2.4
120 1.43 1.33 1.96
Particle size distribution index I=(d90–d10)/2d50。
It can be seen from the results above that the numerical value of particle size distribution index I is smaller, show epigranular.In addition, embodiment 2 In particle size distribution index I numerical value amplitude of variation it is minimum, show that the digestion of entire digestion process is highly uniform.
The present invention can solve completely existing digester digestive efficiency is low, dust collector efficiency is low, the blocking of cleaning shaft, wind A series of problems, such as vibration of machine, sewage sludge recycle, it is ensured that dust pelletizing system can be run steadily in the long term.Quicklime slaking Rate is very high, dust, steam collecting effect can also reach 99% or more, after purification the concentration of emission of exhaust gas dust much smaller than country Defined discharge standard also realizes energy-saving and environment-friendly purpose.

Claims (43)

1. two-stage burnt lime digester (1), it includes：Feed inlet (2), the sealing transportation section that front end is connected with feed inlet (2) Babinet (3), the first digestion section babinet (4) being connected with the rear end of sealing transportation section babinet (3) are located at the first digestion section babinet (4) water injector (5) on top or side；Sealing dust excluding hood (6) at the top of the first digestion section babinet (4) is located at the In one digestion section babinet (4) and at the upper digestion babinet blanking of that one end far from feed inlet (2) and material mouth (7) is disclosed, is located at the The second digestion section babinet (8) below one digestion section babinet (4), is located in the second digestion section babinet (8) and close to feed inlet (2) That one end discharge port (9)；Wherein：In the first digestion section babinet (4) equipped with a pair of with stirring blade (402) the One agitating shaft (401a, 401b), this pair of both first agitating shaft (401a, 401b) are driven by first driving means (11) Dynamic and the two direction of rotation is opposite；In addition, in the second digestion section babinet (8) equipped with a pair of with stirring blade the Two agitating shafts (801a, 801b), this pair of both second agitating shaft (801a, 801b) are driven by the second driving device (12) Dynamic and the two direction of rotation is opposite；With sealing dust excluding hood (6), which has, to gather dust external tapping (601)；
Wherein, one (801a) in the second agitating shaft (801a, 801b) is located in the first agitating shaft (401a, 401b) The underface of one (401a), and the direction of rotation of both their (401a) and (801a) is opposite.
2. digester (1) according to claim 1, wherein the input terminal of water injector (5) and initial water supply line (L0) External, output end is by automating flowmeter water valve (501) and being located at the more of the top that first digests section babinet (4) inner space A telescopic sprinkler head (502) connection；And/or
The height of sealing dust excluding hood (6) set by the first digestion section babinet (4) top is along the material conveying side of the babinet (4) To gradually increasing, the external tapping that gathers dust (601) is located at the end of dust excluding hood 6, passes through the external tapping that gathers dust (601) and extraneous dedusting Device or the pipeline of dust pelletizing system are connected.
3. digester (1) according to claim 2, it is characterised in that：Automate flowmeter water valve (501) and Master Control Room electricity Connection is so as to water progress automation control and with cutting function.
4. digester (1) according to claim 3, it is characterised in that：Multiple scalable sprinkler heads (502) are according to digestion section The length of babinet carries out flexible adjustment, length arrangement straggly.
5. the digester (1) according to any one of claim 1-4, the wherein initial water supply line of water injector (5) (L0) be connected to the hot water outlet of external heat exchanger (X4), the heat exchanger (X4) have cooling water inlet (X5) and hot water outlet with And the cooling gas outlet after hot heat gas import (X6) and heat exchange.
6. the digester (1) according to any one of claim 1-4, wherein the case in two-stage burnt lime digester (1) Digestion babinet apparatus for examination and repair (10) is additionally provided on body, which includes one or more digestion babinet apparatus for examination and repair doors (10a) and one or more digestion babinet apparatus for examination and repair door moving connecting mechanisms (10b).
7. digester (1) according to claim 5, wherein be additionally provided with and disappear on the babinet of two-stage burnt lime digester (1) Change babinet apparatus for examination and repair (10), which includes one or more digestion babinet apparatus for examination and repair doors (10a) and one Or multiple digestion babinet apparatus for examination and repair door moving connecting mechanisms (10b).
8. digester (1) according to claim 6, wherein one or more digestion babinet apparatus for examination and repair door flexible connection Mechanism (10b) is installed in the bottom of the second digestion section babinet (8), the bottom of digestion babinet apparatus for examination and repair door (10a) and digestion Babinet apparatus for examination and repair door moving connecting mechanism (10b) connects, and door (10a) can be rotated around the moving connecting mechanism (10b), digests case The top of device gate (10a) is repaiied in physical examination and lower box top snaps connection, i.e., this top can open and close.
9. digester (1) according to claim 7, wherein one or more digestion babinet apparatus for examination and repair door flexible connection Mechanism (10b) is installed in the bottom of the second digestion section babinet (8), the bottom of digestion babinet apparatus for examination and repair door (10a) and digestion Babinet apparatus for examination and repair door moving connecting mechanism (10b) connects, and door (10a) can be rotated around the moving connecting mechanism (10b), digests case The top of device gate (10a) is repaiied in physical examination and lower box top snaps connection, i.e., this top can open and close.
10. quicklime slaking and dust-extraction unit, it include digester (1) according to any one of claim 1-9 and Wet dust collector (Q1), the latter are connected by a cleaning shaft (Q4) with the external tapping that gathers dust (601) of digester (1)；
Wherein wet dust collector (Q1) includes：
Dedusting pond (Q2)；
Shell of dust remover (Q3) above dedusting pond (Q2)；
Cleaning shaft (Q4),
It is characterized in that：One end of cleaning shaft (Q4) is external to the output end of one or more collection devices containing dusty gas, The other end passes through shell of dust remover (Q3) and stretches into the dedusting pond (Q2) below shell of dust remover (Q3), dedusting from top to bottom One end that pipeline (Q4) stretches into dedusting pond (Q2) is provided with liquid down tube channel showerhead (Q401), wherein liquid down tube channel showerhead (Q401) end is reticular structure or porous structure.
11. quicklime slaking according to claim 10 and dust-extraction unit, it is characterised in that：Cleaning shaft (Q4) is from dedusting The middle part of device shell (Q3) passes through.
12. the quicklime slaking according to claim 10 or 11 and dust-extraction unit, it is characterised in that：The deduster (Q1) is also Including：Overflow water seal water pond (Q5) positioned at the side dedusting pond (Q2), and in dedusting pond (Q2) and overflow water seal water pond (Q5) between, in the water level regulation hole (Q301) that the lower end of the side shell of dust remover (Q3) is issued.
13. quicklime slaking according to claim 12 and dust-extraction unit, which is characterized in that at water level regulation hole (Q301) It is equipped with card on the outside of other shell of dust remover (Q3) and puts slot (Q302) and water level control apparatus (Q6), the water level control apparatus (Q6) packet Water level regulation plate (Q601), screw rod (Q602), regulating valve (Q603) are included, water level regulation plate (Q601) card is placed on the card and puts slot (Q302) in, one end of screw rod (Q602) is connect with water level regulation plate (Q601), the other end of screw rod (Q602) and adjusting Valve (Q603) connects, and wherein the vertical width of water level regulation plate (Q601) is slightly larger than the vertical width of water level regulation hole (Q301).
14. quicklime slaking according to claim 13 and dust-extraction unit, which is characterized in that the deduster (Q1) also wraps It includes：The cover board (Q501) being arranged above overflow water seal water pond (Q5), one end and the shell of dust remover (Q3) of cover board (Q501) connect It connects, the other end is inserted into overflow water seal water pond (Q5).
15. quicklime slaking according to claim 14 and dust-extraction unit, which is characterized in that be provided with one on cover board (Q501) A through-hole, screw rod (Q602) pass through the through-hole.
16. quicklime slaking according to claim 12 and dust-extraction unit, it is characterised in that：On overflow water seal water pond (Q5) Portion is provided with overflow pipe (Q502), for adjusting the water level in overflow water seal water pond.
17. the quicklime slaking according to any one of claim 13-15 and dust-extraction unit, it is characterised in that：Overflow water The top water shutoff pond (Q5) is provided with overflow pipe (Q502), for adjusting the water level in overflow water seal water pond.
18. quicklime slaking according to claim 16 and dust-extraction unit, it is characterised in that：Overflow pipe (Q502) is equipped with Overflow pipe valve (Q503).
19. quicklime slaking according to claim 17 and dust-extraction unit, it is characterised in that：Overflow pipe (Q502) is equipped with Overflow pipe valve (Q503).
20. the quicklime slaking according to claim 10,11,13-16,18, any one of 19 and dust-extraction unit, feature It is：Water supply pipe (Q201) is provided on dedusting pond (Q2), for supplement water in dedusting pond.
21. quicklime slaking according to claim 12 and dust-extraction unit, it is characterised in that：It is set on dedusting pond (Q2) It is equipped with water supply pipe (Q201), for supplement water in dedusting pond.
22. quicklime slaking according to claim 20 and dust-extraction unit, it is characterised in that：It is set on moisturizing water pipe (Q201) There is moisturizing pipe valve (Q202).
23. quicklime slaking according to claim 21 and dust-extraction unit, it is characterised in that：It is set on moisturizing water pipe (Q201) There is moisturizing pipe valve (Q202).
24. the quicklime slaking according to any one of claim 10,11,13-16,18,19,21-23 and dust-extraction unit, It is characterized in that：The bottom dedusting pond (Q2) is funnel-form or " V " type or is rendered as inversed-cone shape；The bottom dedusting pond (Q2) Equipped with sewage sludge tapping equipment (Q203).
25. quicklime slaking according to claim 12 and dust-extraction unit, it is characterised in that：The bottom dedusting pond (Q2) is Funnel-form or " V " type are rendered as inversed-cone shape；The bottom dedusting pond (Q2) is equipped with sewage sludge tapping equipment (Q203).
26. quicklime slaking according to claim 24 and dust-extraction unit, it is characterised in that：In sewage sludge tapping equipment (Q203) hydraulic gage (Q204) is additionally provided in.
27. quicklime slaking according to claim 25 and dust-extraction unit, it is characterised in that：In sewage sludge tapping equipment (Q203) hydraulic gage (Q204) is additionally provided in.
28. quicklime slaking according to any one of claim 10,11,13-16,18,19,21-23,25-27 and Dust-extraction unit, wherein dedusting pond (Q2) top in shell of dust remover (Q3) is provided with holder (Q7), under holder (Q7) Side, which is provided with, to be punctured first group of woven wire (Q701) a little as bubble and holder (Q7) top is provided with second group of metal Silk screen (Q702).
29. quicklime slaking according to claim 12 and dust-extraction unit, wherein the dedusting in shell of dust remover (Q3) Holder (Q7) is provided with above pond (Q2), is provided with below holder (Q7) and punctures first group of woven wire a little as bubble (Q701) and above holder (Q7) it is provided with second group of woven wire (Q702).
30. quicklime slaking according to claim 28 and dust-extraction unit, wherein first group of woven wire (Q701) and/ Or second group of woven wire (Q702) alternating inclinations arrangement, point of intersection are provided with sealing card (Q703).
31. quicklime slaking according to claim 29 and dust-extraction unit, wherein first group of woven wire (Q701) and/ Or second group of woven wire (Q702) alternating inclinations arrangement, point of intersection are provided with sealing card (Q703).
32. quicklime slaking according to claim 28 and dust-extraction unit, wherein on second group of woven wire (Q702) Side is provided with sprinkler head (Q8), is used for spraying water in dust removal or dedusting liquid on second group of woven wire (Q702).
33. the quicklime slaking according to any one of claim 29-31 and dust-extraction unit, wherein in second group of wire It is provided with sprinkler head (Q8) above net (Q702), is used for spraying water in dust removal or dedusting liquid on second group of woven wire (Q702).
34. quicklime slaking according to claim 32 and dust-extraction unit, wherein be provided with gear above sprinkler head (Q8) Water demisting plate (Q9) is provided with net air outlet (Q303) on the shell of dust remover of water blocking demisting plate (Q9) top.
35. quicklime slaking according to claim 33 and dust-extraction unit, wherein be provided with gear above sprinkler head (Q8) Water demisting plate (Q9) is provided with net air outlet (Q303) on the shell of dust remover of water blocking demisting plate (Q9) top.
36. according to claim 10,11,13-16,18,19,21-23,25-27,29-32,34, any one of 35 Quicklime slaking and dust-extraction unit, the deduster (Q1) further include control system (Q10), hydraulic gage (Q204), overflow pipe valve (Q503) it is connect with control system (Q10) with moisturizing pipe valve (Q202), control system (Q10) controls hydraulic gage (Q204), overflow Pipe valve (Q503) and moisturizing pipe valve (Q202).
37. a kind of efficient quicklime slaking and dust pelletizing system, it includes disappearing according to any one of claim 10-36 Change device (1), wet dust collector (Q1), further includes extractor fan (A1), chimney (A2), dusting waste water treatment device (A3), sludge Processing unit (A4), cleaning device (A5) and Slaked lime conveying device (A6) and batch mixer (A7), wet dust collector (Q1) pass through One cleaning shaft (Q4) is connected with the external tapping that gathers dust (601) of digester (1)；Slaked lime conveying device (A6) is located at digestion At the discharge port (9) of device (1), batch mixer (A7) is connect with Slaked lime conveying device (A6), the net air of wet dust collector (Q1) Outlet (Q303) connect by extractor fan (A1) with chimney (A2), the overflow pipe (Q502) of wet dust collector (Q1) and except dustiness Water treatment facilities (A3) connects, the sewage sludge tapping equipment (Q203) and sludge treatment equipment (A4) of the bottom dedusting pond (Q2) Connection, dusting waste water treatment device (A3) are connect with cleaning device (A5).
38. according to a kind of efficient quicklime slaking and dust pelletizing system described in claim 37, it is characterised in that：At dedusting sewage Reason device (A3) is connect with sludge treatment equipment (A4)；Sludge treatment equipment (A4) includes that press filtration water out and press filtration sludge go out Mouthful, press filtration water out is connect with cleaning device (A5), and press filtration sludge outlet is connect with digester (1).
39. the application method of two-stage burnt lime digester uses any one of the claim 1-38 two-stage quicklime slakings The method of device (1), this approach includes the following steps：
(1) quicklime slaking：Quick lime is put into the feed inlet (2) of two-stage burnt lime digester (1), is conveyed via sealing Section babinet (3) is transported in the first digestion section babinet (4)；
(2) section babinet (4) is digested to first by the water injector (5) on the top or side that are located at the first digestion section babinet (4) The quick lime material of interior movement spray water so that quick lime be mixed while moving under the stirring action of agitating shaft and Digestion；
(3) enter after in the second digestion section babinet (8) occur while moving under the stirring action of agitating shaft again into One step mixes and digestion, and postdigestive quick lime is discharged via the discharge port (9) of burnt lime digester (1) bottom；
Wherein：In first digestion section babinet (4) equipped with a pair of with stirring blade (402) the first agitating shaft (401a, 401b), this pair of both first agitating shaft (401a, 401b) is driven and the rotation of the two by first driving means (11) It is opposite to turn direction；In the second digestion section babinet (8) equipped with a pair of with stirring blade the second agitating shaft (801a, 801b), this pair of both second agitating shaft (801a, 801b) is driven and the rotation of the two by the second driving device (12) It is opposite to turn direction；
One (801a) in second agitating shaft (801a, 801b) is located at one in the first agitating shaft (401a, 401b) The underface of (401a), and the direction of rotation of both their (401a) and (801a) is opposite.
40. according to the method for claim 39, it is characterised in that：The input terminal of water injector (5) and initial water supply line (L0) external, output end is by automating flowmeter water valve (501) and the top positioned at first digestion section babinet (4) inner space Multiple telescopic sprinkler heads (502) connections.
41. according to the method for claim 40, it is characterised in that：Automation flowmeter water valve (501) is electrically connected with Master Control Room It connects to carry out automation control to water and to there is cutting function.
42. according to the method for claim 41, it is characterised in that：Multiple scalable sprinkler heads (502) are according to digestion section case The length of body carries out flexible adjustment, length arrangement straggly.
43. according to the method described in any one of claim 40-42, it is characterised in that：The initial feed pipe of water injector (5) Road (L0) is connected to the hot water outlet of external heat exchanger (X4), which has cooling water inlet (X5) and hot water outlet And the cooling gas outlet after hot heat gas import (X6) and heat exchange.
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CN107056095A (en) * 2017-03-22 2017-08-18 肥城汇立机械有限公司 A kind of burnt lime digester
CN110759650A (en) * 2019-12-04 2020-02-07 中国十七冶集团有限公司 Digestion method of quicklime on pavement base
CN111072293A (en) * 2019-12-19 2020-04-28 河北博兆环保科技有限公司 Quick lime slaking equipment with dust removal function
CN112551920A (en) * 2020-10-27 2021-03-26 莱歇研磨机械制造(上海)有限公司 Modular high-temperature material digestion system

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