CN206014705U - Burnt lime digester, quicklime slaking and dust arrester and system - Google Patents

Abstract

Burnt lime digester, quicklime slaking and dust arrester and system, it include burnt lime digester, wet dust collector, extractor fan, chimney, dusting waste water treatment device, sludge treatment equipment, cleaning device, Slaked lime conveying device, batch mixer.Burnt lime digester, it include：Charging aperture, seals transportation section casing, and the first digestion section casing, water injector seal dust excluding hood, at upper digestion casing blanking and disclose material mouth, and the second digestion section casing at the second digestion casing blanking and discloses material mouth, the 3rd digestion section casing, discharging opening；First digests the first shaft with stirring vane that section casing is built with a pair, and the first shaft is driven by first driving means；Second digests the second shaft with stirring vane that section casing is built with a pair, and the second shaft is driven by the second driving means；3rd digests the 3rd shaft with stirring vane that section casing is built with a pair, and the 3rd shaft is driven by the 3rd driving means.

Description

Burnt lime digester, quicklime slaking and dust arrester and system

Technical field

The utility model is related to steel sintering factory quicklime slaking field, more particularly to is burnt lime digester, quick lime Digestion and dust arrester and system.Digestion and the digestion dedusting environmental pollution of quick lime are mainly solved the problems, such as.

Background technology

With the development of modern industry, the raising of people's living standard, the requirement more and more higher to environmental protection, keep the safety in production, Clean manufacturing has become the mark of modern enterprise civilization.

In iron and steel metallurgical industry, generally require and iron ore is sintered before blast furnace ironmaking is entered, and quick lime pair Sintering process plays more important effect, and first, the granulating efficiency of mixed material is improved, improves bed permeability, with digestion Before compare, compound>The grade of 3mm increased more than 10%, 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 in sintering process, heat endurance is good, can resist dry zone Destruction, mitigates the impact of excessive moistening layer；3rd, improve material temperature；4th, reduce the consumption of solid fuel.Research shows, due to The raising of material temperature, the improvement of relatively fruit of pelletizing, Sintering Yield can improve 10% or so, save coke powder 1.5kg/t；Current quick lime One of sintering plant main flux is had become, proportioning is in 3%-5%.

Current use of the quick lime in sintering is very undesirable, is primarily present problems with：

First, sintering plant generally adopts single-stage digester, and digestion time is short, and digestibility is low, and indigested quick lime is mixed one Continue digestion in mixed with two.1～1.5 times of volumetric expansion during quicklime slaking, destroys the granulation bead of balling-up, affects the bed of material Gas permeability, does not give full play to the digestion of quick lime.

2nd, without special digestion deduster.A large amount of ash-laden gas can be produced during quicklime slaking, due to flue gas characteristic Particularity, the dust removing effects of common deduster cannot meet national emissions concentration standard, and due to lime dust caking property very By force, cleaning shaft blocking, fan vibration etc. are easily caused.

Three additionally, dedusting sewage, steel-smelting sewage sludge, dedusting sludge etc. are not effectively addressed, and cause to waste and secondary Pollution.

The presence of problem above has a strong impact on the digestion of quick lime, dedusting, the process for also having sewage sludge.In order to solve to burn Quicklime slaking and dust removal problem in knot, further improve energy-saving and emission-reduction work in sintering process, need to design quicklime slaking And dust pelletizing system is poor to solve the problems, such as raw ash digestion effect, solves the dust removal problem that quicklime slaking brings again.

Utility model content

The purpose of this utility model is to provide a kind of efficient burnt lime digester, with solve digester digestive efficiency low and The problem of digestion effect difference, and the problems such as a large amount of dust smoke pollution.

The utility model provides a kind of efficient burnt lime digester, and the digester is multistage digester, there is provided perfect is more Level digestion process, quick lime falls on the belt conveyer scale under storehouse from ash silo, then sends in multistage digester by conveying worm Row digestion.

Digester described herein be multistage digester, i.e., digestion section have upper and lower two or more.

Another purpose of the present utility model is to provide a kind of efficient quicklime slaking and dust pelletizing system, to solve to give birth to stone Ash insufficient, the low problem of digester efficiency of dust collection of digestion, and cleaning shaft blocking, fan vibration, dusting waste water treatment etc. Problem.

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) adds water (H₂O) calcium hydroxide (Ca (OH) is generated₂) And release substantial amounts of heat.The dust main component that digester is produced 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 easily sticking on deduster and dedusting tube wall, here it is causing deduster and cleaning shaft blocking, blower fan The true cause of vibration.

The utility model provides a kind of efficient quicklime slaking and dust pelletizing system, to solve quicklime slaking in prior art Insufficient, there is lime dust to collect, the problems such as deduster and cleaning shaft blocking, fan vibration, dust waste water are recycled.

According to first embodiment of the present utility model, there is provided two-stage burnt lime digester, it includes：Charging aperture, front The sealing transportation section casing that end is connected with charging aperture, the first digestion section case being connected with the rear end of sealing transportation section casing Body, positioned at the top of the first digestion section casing or the water injector of sidepiece；It is located at the sealing dedusting of the first digestion section casing top Cover, in the first digestion section casing and at upper digestion casing blanking away from that one end of charging aperture and discloses material mouth, positioned at the The second digestion section casing below one digestion section casing, digests in section casing positioned at second and going out near that one end of charging aperture Material mouth；Wherein：In the first digestion section casing built with a pair of the first shaft with stirring vane, first stir for this pair Mix that both axles are driven by first driving means and both direction of rotation is contrary；In addition, in the second digestion section casing The second shaft with stirring vane equipped with a pair, this pair both second shaft are driven by the second driving means Move and both direction of rotation are contrary；With sealing dust excluding hood has the external tapping that gathers dust.

According to second embodiment of the present utility model, there is provided three-level burnt lime digester, it includes：Charging aperture, front The sealing transportation section casing that end is connected with charging aperture, the first digestion section case being connected with the rear end of sealing transportation section casing Body, positioned at the top of the first digestion section casing or the water injector of sidepiece；It is located at the sealing dedusting of the first digestion section casing top Cover, in the first digestion section casing and at upper digestion casing blanking away from that one end of charging aperture and discloses material mouth, positioned at the The second digestion section casing below one digestion section casing, the in the second digestion section casing and near that one end of charging aperture Two digest at casing blankings and disclose material mouth (i.e. discharging opening), the 3rd digestion section casing below the second digestion section casing, position In the 3rd digestion section casing and that one end away from charging aperture discharging opening；Wherein：Section casing is digested built with one first To the first shaft with stirring vane, this pair both first shaft by first driving means driven and Both direction of rotation are contrary；The second shaft with stirring vane that section casing is built with a pair is digested second, this To both the second shafts driven by the second driving means and both direction of rotation is contrary；Section case is digested the 3rd A pair of the 3rd shaft with stirring vane is housed in vivo, this pair both the 3rd shaft passes through the 3rd driving means Driven and both direction of rotation is contrary；With sealing dust excluding hood has the external tapping that gathers dust.

In above-mentioned two embodiment, it is preferable that in the middle of the second shaft is located in the middle of the first shaft Individual underface, and the direction of rotation of both is contrary.

Further preferably, in the middle of the second shaft is located at the underface of in the middle of the first shaft, and Both direction of rotation conversely, with the 3rd shaft in the middle of be located in the middle of the second shaft just under Side, and the direction of rotation of both is contrary.

It is preferred that, the input of water injector is external with initial water supply line, output end by automate flowmeter water valve with It is located at the multiple telescopic sprinkler head connection on the top of the first digestion section housing interior volume；Preferably, flow is automated Meter water valve is electrically connected to carry out the water yield Automated condtrol and there is cutting function with Master Control Room；It may further be preferable that many Individual scalable sprinkler head carries out flexible adjustment, length arrangement straggly according to the length of digestion section casing.

In addition, the hot water outlet of the externally connected heat exchanger of the initial water supply line of water injector.The heat exchanger has Cooling gas outlet after the hot gas import of cooling water inlet and hot water outlet and heat and heat exchange.As shown in Figure 2 a.

It is preferred that, material conveying direction of the height of set sealing dust excluding hood along the case above the first digestion section casing Gradually increase, the external tapping that gathers dust is located at the end of dust excluding hood, by gather dust external tapping and deduster or the dust pelletizing system in the external world Pipeline be connected.

It is preferred that, digestion casing maintenance dress is additionally provided with the casing of two-stage burnt lime digester or three-level burnt lime digester Put, the apparatus for examination and repair includes that one or more digestion casing apparatus for examination and repair doors and one or more digestion casing apparatus for examination and repair doors are lived Dong Lian mechanisms；Preferably, one or more digestion casing apparatus for examination and repair door moving connecting mechanisms are installed in the second casing Bottom is installed in the second casing and the respective bottom of the 3rd casing simultaneously, digests bottom and the digestion of casing apparatus for examination and repair door Casing apparatus for examination and repair door moving connecting mechanism connects, and door can be rotated around the moving connecting mechanism, digest casing apparatus for examination and repair door Top is snapped connection with lower box top, i.e. digestion casing apparatus for examination and repair door top can be opened and be closed,

In this application, two-stage digester is also referred to as upper and lower two-stage digester, three-level digester also referred to as upper and lower three Level digester.

The length of two-stage or three-level digester in the application is usually 3-30m, preferably 4-20m, more preferably 5-10m.This Two-stage or three-level digester in application can be supported on support or on pedestal.

According to the 3rd embodiment of the present utility model, there is provided quicklime slaking and dust arrester, it include above-mentioned A kind of what digester and wet dust collector, the latter are connected with the external tapping that gathers dust of digester by a cleaning shaft；

Wherein wet dust collector includes：

Dedusting pond；

The shell of dust remover being located above dedusting pond；

Cleaning shaft,

It is characterized in that：One end of cleaning shaft is external to one or more output ends containing dusty gas collection device (the dedusting interface of such as limeslaker), the other end through shell of dust remover and are stretched into below shell of dust remover from top to bottom In dedusting pond, cleaning shaft stretches into the one end in dedusting pond and is provided with liquid down tube channel showerhead, wherein liquid down tube channel showerhead End is network structure or loose structure；Preferably, cleaning shaft is passed through (i.e. along axis from the middle part of shell of dust remover Line).

It is preferred that, the deduster also includes：Be located at dedusting pond side overflow water seal water pond, and dedusting pond with overflow Between flowing water water shutoff pond, in the water level regulation hole issued by the lower end of shell of dust remover side；It is further preferred that in water level regulation Card being provided with the outside of shell of dust remover by hole and putting groove and water level control apparatus, the water level control apparatus include water level regulation plate, spiral shell Swing arm, regulating valve, water level regulation board are placed on the card and put in groove, and one end of screw rod is connected with water level regulation plate, screw rod The other end be connected with regulating valve, wherein the vertical width of water level regulation plate slightly larger than water level regulation hole vertical width.

It is preferred that, the deduster also includes：The cover plate being arranged on above overflow water seal water pond, one end of cover plate and deduster shell Body connects, in other end insertion overflow water seal water pond；It is further preferred that being provided with a through hole on cover plate, screw rod is logical through this Hole.Screw rod is moved up and down along the through hole, therefore drive water level regulation plate 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 provided with overflow pipe valve.

It is preferred that, be provided with filling pipe on dedusting pond, for in dedusting pond supplement water；Preferably, moisturizing water Pipe is provided with moisturizing pipe valve.

It is preferred that, dedusting basin bottom is funnel-form or " V " type or is rendered as inversed-cone shape, and dedusting basin bottom is provided 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, support is provided with above the dedusting pond in shell of dust remover, be provided with as bubble below support Puncture first group of woven wire (preferably V-type screen pack or V-type woven wire) a little and second group is provided with above support 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, dash demisting plate is provided with above sprinkler head, on shell of dust remover above dash demisting plate It is provided with net air outlet.

It is preferred that, deduster also includes that control system, hydraulic gage, overflow pipe valve and moisturizing pipe valve are connected with control system, control System control hydraulic gage processed, overflow pipe valve and moisturizing pipe valve.

Wet dust collector described herein can be mounted or positioned on pedestal, or is supported on support bracket.One As, the housing sidepiece of wet dust collector assumes the housing side cross sectional of cylindrical shape or oval cylinder, i.e. wet dust collector for circle Shape or ellipse.The housing side cross sectional that four prism type, i.e. wet dust collector can be also rendered as is rectangle or square.Water Body height (height of i.e. whole housing) the usually 1.2m-10m of bath deduster, more preferably preferably 1.5-7m, 2.0-5m.

According to other side of the present utility model, there is provided a kind of use includes that the above-mentioned of two-stage burnt lime digester disappears Change the quicklime slaking and dust collection method with dust arrester, the method is comprised the following steps：

1) quicklime slaking：Quick lime is put in the charging aperture of two-stage burnt lime digester, via sealing transportation section Casing is transported in the first digestion section casing, by being located at the top of the first digestion section casing or the water injector of sidepiece to the In one digestion section casing motion quick lime material water spray so that quick lime under the stirring action of shaft while moving one There is mixing and digest in side, enter afterwards and moved under the stirring action of shaft in the second digestion section casing again Occur further to mix and digest, postdigestive quick lime is discharged via the discharging opening of burnt lime digester bottom；With

2) dedusting of dusty gas：Dusty gas in sealing dust excluding hood is defeated from the external tapping that gathers dust of sealing dust excluding hood 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, dedusting is carried out by contacting with water, the net air outlet that the gas after dedusting is arranged from shell of dust remover is discharged.

According to of the present utility model in terms of another, there is provided a kind of using including that the above-mentioned of three-level burnt lime digester disappears Change the quicklime slaking and dust collection method with dust arrester, the method is comprised the following steps：

1) quicklime slaking：Quick lime is put in the charging aperture of three-level burnt lime digester, via sealing transportation section Casing is transported in the first digestion section casing, by being located at the top of the first digestion section casing or the water injector of sidepiece to the In one digestion section casing motion quick lime material water spray so that quick lime under the stirring action of shaft while moving one There is mixing and digest in side, enter afterwards and moved under the stirring action of shaft in the second digestion section casing again Occur further to mix and digest, enter afterwards and moved under the stirring action of shaft in the 3rd digestion section casing again While occurring further to mix and digest, postdigestive quick lime is discharged via the discharging opening of burnt lime digester bottom；With

2) dedusting of dusty gas：Dusty gas in sealing dust excluding hood is defeated from the external tapping that gathers dust of sealing dust excluding hood 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, dedusting is carried out by contacting with water, the net air outlet that the gas after dedusting is arranged from shell of dust remover is discharged.

A kind of using method of wet dust collector or the method for carrying out dedusting using above-mentioned wet dust collector, the method include Following steps：

(1) by filling pipe to retaining in dedusting pond, water level regulation plate is adjusted, reaches water level in dedusting pond predetermined Value, closes moisturizing pipe valve；

(2) dusty gas (dust flue gas for for example coming from the dedusting interface of burnt lime digester) by cleaning shaft from upper And under enter from the middle part of shell of dust remover in deduster, by smoke property and the uninterrupted of flue gas, adjust water level control apparatus, Certain position (such as 0.2-0.8m) in cleaning shaft insertion dedusting pond, cleaning shaft is made to insert under water and be provided with net The liquid down tube channel showerhead of shape structure or loose structure；

(3) (with certain speed) dusty gas flows through cleaning shaft and sprays (at a relatively high speed) at liquid down tube channel showerhead Go out, water layer is produced and is entered after percussion in water, the direction of motion of gas changes, and grit is then continued due to the effect of inertia Original direction motion is pressed, is stayed in water after wherein most grit and water adhesion, smoke-shock water body is through liquid down tube channel showerhead Network structure cuts into minute bubbles, increased the contact area of flue gas and water, strengthens seizure of the water in dust removal to dust, realizes One-level impulse type water bath dedusting；

(4) in water bath dust-removing, flue gas, most of dust is removed, and remainder particle dust is through first group of gold Category silk screen forms the second moisture film that first moisture film and second group of woven wire are formed, twice moisture film to flue gas in fine powder Dirt is caught, and realizes that second level filtering type water film dedusting, purified gas are arranged from exit after the process of dash demisting plate Go out.

(5) dedusting pond has turned into sewage through prolonged dedusting, 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 carries out moisturizing from filling pipe.

In the utility model, liquid down tube channel showerhead extends into certain position in housing bottom dedusting pond, insertion depth Relevant with dust characteristic, generally 20-80cm.Soot density is big, particle is thick, then insertion depth is such as 20～50cm；Dust Density is little, particle is thin, then insertion depth is 30～80cm, and the pipeline shower nozzle purpose is that flue gas is divided into multiple gas columns to enter water In, increase contact of the flue gas with water, improve efficiency of dust collection.

In the utility model, can be too high so that water level is raised in dedusting pond when dusty gas or flue gas is passed through Water can be arranged on the overflow pond on the outside of adjustable plate from water level regulation hole flow direction, can so make the water level in dedusting pond keep closing Suitable height, can not only make the smooth suction of flue gas, and also assures that do not have water depth to shower nozzle；

In the utility model, support is being provided with above dedusting pond in housing, is being provided with first group below support Woven wire, the woven wire are one group of V-type screen pack, for puncturing the flue gas bubble from dedusting pond out, and disperse Open air-flow.Reverse V-shaped second group of woven wire is provided with above support.Second group of woven wire alternating inclinations arrangement, point of intersection Sealing card is provided with, side is provided with sprinkler head on a wire mesh, for dedusting liquid being sprayed on woven wire, on wire netting The moisture film for flowing downward is formed, then the bubble flowed to below support punctures net and forms second moisture film, fully catch dust.

In the utility model, this deduster arranges water level control apparatus, by adjusting the height of water level regulation plate come real Existing water level regulation function, when deduster air exhauster starts, in deduster, negative pressure is uprushed, and water level is raised suddenly, but water energy is from water level Adjustment hole is discharged to overflow water seal water pond, it is ensured that liquid down tube channel showerhead does not have water depth stably within limits, so as to protect wind Machine avoids resistance from uprushing and motor damage.When deduster normally runs, water level control apparatus governor valve control adjustable plate can be passed through Move up and down, water level is adjusted, shower nozzle capable of on-line does not have water depth, it is ensured that the stable and Effec-tive Function of equipment.

A kind of efficient quicklime slaking and dust pelletizing system, it includes digester, wet dust collector, also 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 with the external tapping that gathers dust of digester by a cleaning shaft；Slaked lime conveying device is located at the discharging opening of digester Place, batch mixer are connected with Slaked lime conveying device, and the net air outlet of wet dust collector is connected with chimney by extractor fan, water The overflow pipe of bath deduster is connected with dusting waste water treatment device, at the sewage sludge tapping equipment of dedusting basin bottom and sludge Reason device connection, dusting waste water treatment device are connected with cleaning device.

Optionally, dusting waste water treatment device is connected with sludge treatment equipment.

Preferably, sludge treatment equipment includes press filtration water out and press filtration sludge outlet, press filtration water out and cleaning dress Connection is put, press filtration sludge outlet is connected with digester.

In the utility model, digester is multistage burnt lime digester, for example：Two-stage burnt lime digester, three-level life Limeslaker.Dusting waste water treatment device includes stirring pool, sedimentation basin, clear water reserviors, pipe-line equipment etc..Sludge treatment equipment bag Include filter-pressing device, reducing mechanism etc..

A kind of quicklime slaking, dedusting and sewage treatment process, comprise the following steps：

(1) quicklime slaking：Quick lime is put in burnt lime digester and quick lime is digested using water；

(2) dedusting of dusty gas：The dusty gas output that discharges in burnt lime digester is entered in wet dust collector Row dedusting, the dedusting sewage in the dedusting pond of wet dust collector bottom are discharged in stirring pool；

(3) sewage in stirring pool is transferred in sedimentation basin and is optionally transported in burnt lime digester and is used as to disappear Change water, by settlement of sewage, layering in sedimentation basin, upper strata is precipitation water, and lower floor is precipitating sludge；

(4) the precipitation water in sedimentation basin is transferred in clear water reserviors, the water in clear water reserviors passes through fresh water pipeline with clarified water pump Cleaning device is transported to, and optionally the water in clear water reserviors is transported in burnt lime digester is used as digestion water；

(5) precipitating sludge in sedimentation basin forms press filtration sludge and press filtration water by filter-pressing device press filtration, and press filtration water is defeated It is sent in burnt lime digester and is used as digestion water or sends in stirring pool, press filtration sludge is transported to ash silo or stirring through broken In pond or it is delivered in burnt lime digester.

It is preferred that, in step, purification gas of the dusty gas after deduster process are transported to chimney by air exhauster is carried out Outer row.

It is preferred that, final dusting device and moisture collection device is additionally provided with the chimney.

It is preferred that, the cleaning device is cleaned to whole equipment, it is preferred that after cleaning, collected sewage is imported and stirred Mix in pond.Whole equipment includes stirring pool, mixer, 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, mixer is provided with above stirring pool.

It is preferred that, steel-smelting sewage sludge is pumped in burnt lime digester by sludge.

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 air exhauster by moisturizing pipeline, for cleaning air exhauster.

It is preferred that, ball-cock assembly is provided with clear water reserviors, controls rate of water make-up, dynamic of water balance in holding system.

In the utility model, the cleaning of pipeline and equipment：The main component of limeslaker dust is CaO, Ca (OH)₂ And water vapour, caking property is very strong in high temperature, in the environment of moistening for this dust, will glue when dusty gas passes through cleaning shaft Knot is thickeied in inner-walls of duct, gradually until block, and dedusting pipeline can keep unimpeded time less than one month under normal circumstances. For preventing cleaning shaft from blocking, need to clean pipeline in time, cleaning device is designed on pipeline.In order to prevent pipeline from blocking up Plug, dedusting circuit design should reduce horizontal pipe as far as possible and shorten pipeline distance, and consider installation site and the inspection of cleaning device Equating platform.Still containing a small amount of lime dust and substantial amounts of water vapour, the gas pole of moistening holds wet dust collector purified gas Fan blade laying dust and fouling is easily caused, local shedding is occurred after blade laying dust reaches certain thickness, is caused impeller balance There is vibration in destruction, blower fan.In order to solve above-mentioned frequent produced problem, ash removing opening, periodic cleaning is opened up on fan casing The laying dust of draught fan impeller；And cleaning device is installed before air inlet, spray the laying dust on cleaning fan blade in time for a long time, Guarantee the balance of impeller.

The utility model can solve that existing digester digestive efficiency is low, dust collector efficiency is low completely, cleaning shaft stifled A series of problems, such as plug, the vibration of blower fan, sewage sludge are recycled, it is ensured that dust pelletizing system can be run steadily in the long term.Raw stone Grey digestibility is very high, and dust, the collecting effect of steam can also reach more than 99%, and after purification, the concentration of emission of exhaust gas dust is far little In the discharge standard of national regulation, the purpose of energy-conserving and environment-protective is also realized.

In the utility model, by removing together with the dedusting that put with other of dust that burnt lime digester can also be collected Dust arrester sent into by dirt pipeline.

The using method of three-level burnt lime digester, the method are comprised the following steps：

(1) quicklime slaking：Quick lime is put in the charging aperture of three-level burnt lime digester, via sealing transportation section Casing is transported in the first digestion section casing；

(2) moved into the first digestion section casing by being located at the top of the first digestion section casing or the water injector of sidepiece Quick lime material water spray occur on one side mixing and digestion so that quick lime move under the stirring action of shaft；

(3) enter after and moved under the stirring action of shaft while entering again in the second digestion section casing The mixing of one step and digestion；

(4) enter after and moved under the stirring action of shaft while entering again in the 3rd digestion section casing The mixing of one step and digestion, postdigestive quick lime are discharged via the discharging opening of burnt lime digester bottom.

Preferably, first digestion section casing built with a pair the first shaft with stirring vane and, this is a pair Both the first shafts driven by first driving means and both direction of rotation is contrary.

Preferably, second digestion section casing built with a pair the second shaft with stirring vane and, this To both the second shafts driven by the second driving means and both direction of rotation is contrary.

Preferably, the 3rd digestion section casing built with a pair the 3rd shaft with stirring vane and, this To both the 3rd shafts driven by the 3rd driving means and both direction of rotation is contrary.

Preferably, the second shaft and central one underface for being located at the first shaft and central, and And both direction of rotation conversely, with the 3rd shaft in the middle of one be located at the second shaft in the middle of one just under Side, and the direction of rotation of both is contrary.

Preferably, the input of water injector is external with initial water supply line, output end is by automating flowmeter water Valve is connected with the multiple telescopic sprinkler head on the top for being located at the first digestion section housing interior volume；Preferably, automate Flowmeter water valve is electrically connected to carry out the water yield Automated condtrol and there is 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 casing.

Preferably, the hot water outlet of the externally connected heat exchanger of the initial water supply line of water injector, the heat exchanger The cooling gas outlet having after the hot gas import and heat exchange of cooling water inlet and hot water outlet and heat.

Compared with prior art, the utility model has following Advantageous Effects：

1st, compared with single-stage digestion, digestibility increases by 1 to 2 times, and digestible degree is high, the digestion process parameter of science, maximum Changing makes quicklime slaking complete.In digestion process, heat loss is less, i.e. the amplitude of temperature drop is relatively low.In waste gas, dust is obvious Reduce, reduce the burden of follow-up dedusting.The power of stirring is shared by multiple shafts, reduces the abrasion of driving equipment.

2nd, the part in sealing transportation section casing is provided with continuous conveyor screw blade, seal the inwall of transportation section casing with Helixseal conveying is formed between continuous conveyor screw blade, only allows quick lime to push ahead entrance digestion section casing, can Effectively prevent steam anti-channeling to feeding mouth from causing hardened or affecting belt conveyer scale weighing precision.

3rd, Double shaft stirring form is adopted, with stirring, multiple action and the effects such as caking and self-cleaning is crushed；Improve raw stone Grey stirring frequency, is made quick lime be well mixed with water, reacts abundant；Stirrer paddle adopts manganese steel plate weld carbide bit, Increase the service life.

4th, as a result of multistage digestion, the also Automated condtrol of the water yield so that digestion effect very well, the dust of generation Also corresponding a large amount of external environment conditions for reducing, substantially improving digestion place, digest region dust concentration far below national emission Concentration standard, has administered the problem of environmental pollution of existing digestion zone.

5th, the maintenance blind spot of section below is digested for multistage digester one-level, there is provided a kind of effective expansion maintenance side Method, solves a multistage digester maintenance difficult problem.

The utility model is fully solved the problem that existing digester digestive efficiency is low and digestion effect is poor, and a large amount of dust The problems such as smoke pollution.

In addition, deduster of the present utility model is produced the advantage that：

1st, the utility model is by adjusting water level regulation equipment, it is ensured that suitable immersion depth (the such as 50cm- of fume pipe 80cm), by the shower nozzle of network structure or loose structure and the synergy of water level regulation equipment so that the ripple of the pressure of flue gas Move and buffered.The size of produced bubble is less and uniform.Achieve being fully contacted for flue gas containing dust and water, dust removing effects Good.

2nd, 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%.

3rd, water level in deduster can be adjusted when equipment runs, reaches higher purification efficiency, while ensureing purifier Running resistance is relatively low, and equipment energy consumption is low.

4th, using overflow water seal, the fluctuation range of liquid level in purifier cylinder is controlled well, it is ensured that purifier There is stable purification efficiency, and protective effect is served to blower fan.

5th, dedusting sewage can be recycled after sewage disposal again, reduced sewage discharge capacity, prevented secondary pollution.

6th, the utility model simple structure, operation, easy to maintenance.

The utility model efficiently solves the problems, such as that quicklime slaking dust removing effects are poor, and solves existing quick lime and disappear Change a large amount of dust flue gas problem of environmental pollution.

Description of the drawings

Fig. 1 is the schematic flow sheet of quicklime slaking of the present utility model and dust pelletizing system.

Structural representations of the Fig. 2 for the utility model (upper and lower) two-stage digester.

Fig. 2 a are the sheet of the hot water outlet of the externally connected heat exchanger X4 of initial water supply line L0 of wherein water injector 5 The structural representation of utility model (upper and lower) two-stage digester.

Fig. 3 is the overlooking the structure diagram of digester shown in Fig. 2 of the present utility model.

Fig. 4 is the left view schematic diagram of digester shown in Fig. 2 of the present utility model.

Structural representations of the Fig. 5 for the utility model (upper and lower) three-level digester.

Fig. 6 is the structural representation of the wet dust collector of quicklime slaking of the present utility model and dust pelletizing system.

Fig. 7 is the structural representation that the utility model wet dust collector is provided with control system.

Fig. 8 is a kind of efficient quicklime slaking of the utility model and dust pelletizing system schematic diagram；

Fig. 9 is the utility model another kind of efficiently quicklime slaking and dust pelletizing system schematic diagram.

Reference：

In Fig. 1, Q- quick limes；A or 1- digesters (or slaking apparatus)；B or Q1- dedusters (or dust arrester)；C- takes out Blower fan；D- chimneys；E- sewage-treatment plants；E1- stirring pools；E2- sedimentation basins；E3- clear water reserviors；E11- mixers；F1- sewage Pump；F2- clarified water pumps；K- cleaning devices；J- other dedustings；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- charging apertures；201- self seal valves；3- seals transportation section casing；301- Conveyor screw blade；4- first digests section casing；Bed in the first beds of 4a- or the first digestion section casing；401a and 401b- First shaft；402- stirring vanes；5- water injectors；501- automates flowmeter water valve；The scalable sprinkler heads of 502-；6- is close Envelope dust excluding hood；601- gathers dust external tapping；7- first (on) at digestion casing blanking and disclose material mouth；7a- second (in) digestion casing At blanking and disclose material mouth；8- second digests section casing；Bed in the second beds of 8a- or the second digestion section casing；801a and The second shafts of 801b-；9- discharging openings；10- digests casing apparatus for examination and repair；10a- digests casing apparatus for examination and repair door；10b digests case Device gate articulating device is repaiied in health check-up；11- first driving means；11a- first shaft couplings；11b- first gear casees；11c- One bearing block；The second driving means of 12-；12a- second shaft couplings；12b- second gear casees；12c- second bearing seats；13- the 3rd Driving means；The 3rd shaft couplings of 13a-；The 3rd gear-boxes of 13b-；13c- 3rd bearing seats；14- the 3rd digests section casing；14a- Bed in 3rd bed or the 3rd digestion section casing；The 3rd shaft (to) of 1401a and 1401b-；The initial water supply lines of L0-； X4- heat-exchange devices；X5- cold water；X6- hot gas (such as central cooler hot blast).

In Fig. 6 and Fig. 7, Q1：Deduster；Q2：Dedusting pond；Q201：Filling 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 groove；Q303：Headroom Gas is exported；Q4：Cleaning shaft；Q401：Liquid down tube channel showerhead；Q5：Overflow water seal water pond；Q501：Cover plate；Q502：Overflow pipe； Q503：Overflow pipe valve；Q6：Water level control apparatus；Q601：Water level regulation plate；Q602：Screw rod；Q603：Regulating valve；Q7：? Frame；Q701：First group of woven wire；Q702：Second group of woven wire；Q703：Sealing card；Q8：Sprinkler head；Q9：Dash 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 embodiment

According to first embodiment of the present utility model, there is provided two-stage burnt lime digester 1, it includes：Charging aperture 2, The sealing transportation section casing 3 that front end is connected with charging aperture 2, the first digestion being connected with the rear end of sealing transportation section casing 3 Section casing 4, positioned at the top of the first digestion section casing 4 or the water injector 5 of sidepiece；It is located at the top of the first digestion section casing 4 Sealing dust excluding hood 6, at the upper digestion casing blanking in the first digestion section casing 4 and away from that one end of charging aperture 2 and discloses Material mouth 7, the second digestion section casing 8 below the first digestion section casing 4, in the second digestion section casing 8 and near entering The discharging opening 9 of that one end of material mouth 2；Wherein：The first digestion section casing 4 built with a pair with stirring vane 402 the One shaft 401a and 401b, this pair first shaft 401a and 401b are driven simultaneously by first driving means 11 And both direction of rotation are contrary；In addition, digesting the second stirring with stirring vane that section casing 8 is built with a pair second Axle 801a and 801b, this pair second shaft 801a and 801b by the second driving means 12 driven and both Direction of rotation contrary；With sealing dust excluding hood 6 has the external tapping 601 that gathers dust.

According to second embodiment of the present utility model, there is provided three-level burnt lime digester 1, it includes：Charging aperture 2, The sealing transportation section casing 3 that front end is connected with charging aperture 2, the first digestion being connected with the rear end of sealing transportation section casing 3 Section casing 4, positioned at the top of the first digestion section casing 4 or the water injector 5 of sidepiece；It is located at the top of the first digestion section casing 4 Sealing dust excluding hood 6, at the upper digestion casing blanking in the first digestion section casing 4 and away from that one end of charging aperture 2 and discloses Material mouth 7, the second digestion section casing 8 below the first digestion section casing 4, in the second digestion section casing 8 and near entering The second of that one end of material mouth 2 digests at casing blanking and discloses material mouth (i.e. discharging opening) 7a, below the second digestion section casing 8 The 3rd digestion section casing 14, the discharging opening 9 of that one end in the 3rd digestion section casing 14 and away from charging aperture 2；Wherein： In the first digestion section casing 4 built with a pair of the first shaft 401a and 401b with stirring vane 402, this pair the One shaft 401a and 401b is driven by first driving means 11 and both direction of rotation is contrary；Disappear second Change the second shaft 801a and 801b with stirring vane that section casing 8 is built with a pair, this pair second shaft 801a and 801b is driven by the second driving means 12 and both direction of rotation is contrary；Section casing is digested the 3rd 14 built with a pair of the 3rd the shaft 1401a and 1401b with stirring vane, this pair the 3rd shaft 1401a and Both 1401b are driven by the 3rd driving means 13 and both direction of rotation is contrary；With sealing dust excluding hood 6 has to be received Dirt external tapping 601.

In above-mentioned two embodiment, it is preferable that a 801a in the middle of the second shaft 801a and 801b is located at first The underface of a 401a in the middle of shaft 401a and 401b, and the direction of rotation of their 401a and 801a is contrary.

Further preferably, a 801a in the middle of the second shaft 801a and 801b is located at the first shaft 401a and 401b The underface of a central 401a, and their 401a and 801a direction of rotation conversely, with the 3rd shaft 1401a The underface of a 801a in the middle of the second shaft 801a and 801b, and they are located at a 1401a in the middle of 1401b The direction of rotation of 401a and 801a is contrary.

It is preferred that, the input of water injector 5 is external with initial water supply line L0, and output end is by automating flowmeter water valve 501 are connected with the multiple telescopic sprinkler head 502 on the top for being located at 4 inner space of the first digestion section casing；Preferably, certainly Dynamicization flowmeter water valve 501 is electrically connected to carry out the water yield Automated condtrol and there is 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 casing.

In addition, the hot water outlet of the externally connected heat exchanger X4 of the initial water supply line L0 of water injector 5.The heat exchanger There is X4 cooling water inlet X5 and hot water outlet and the hot gas import X6 of heat to export with the cooling gas after heat exchange, such as Fig. 2 a Shown in.Correspondingly, in Fig. 5, the hot water of the heat exchanger X4 that the initial water supply line L0 of water injector 5 can also be externally connected Outlet.

It is preferred that, above the first digestion section casing 4, the height of set sealing dust excluding hood 6 is defeated along the material of the casing 4 Direction is sent gradually to increase, the external tapping 601 that gathers dust is located at the end of dust excluding hood 6, by gather dust external tapping 601 and the extraneous dedusting The pipeline of device or dust pelletizing system is connected.

It is preferred that, digestion casing maintenance is additionally provided with the casing 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 casing apparatus for examination and repair door 10a and the inspection of one or more digestion casings Repair device gate activity even mechanism 10b；Preferably, one or more digestion casing apparatus for examination and repair door moving connecting mechanism 10b quilts It is arranged on the bottom of the second casing or is installed in the second casing and the respective bottom of the 3rd casing simultaneously, digestion casing maintenance dress The bottom for putting a 10a is connected with digestion casing 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 for digesting casing apparatus for examination and repair door 10a is snapped connection with lower box top, that is, digest casing apparatus for examination and repair door 10a tops can be opened and be closed,

According to the 3rd embodiment of the present utility model, there is provided quicklime slaking and dust arrester, it include above-mentioned A kind of what digester 1 and wet dust collector Q1, the latter is by a cleaning shaft Q4 and the external tapping 601 that gathers dust of digester 1 It is connected；

It is preferred that, above-mentioned wet dust collector Q1 includes：

Dedusting pond Q2；

The shell of dust remover Q3 being located above the Q2 of dedusting pond；

Cleaning shaft Q4,

It is characterized in that：One end of cleaning shaft Q4 is external to one or more output ends containing dusty gas collection device (the dedusting interface of such as limeslaker), the other end through shell of dust remover Q3 and are stretched under shell of dust remover Q3 from top to bottom In the dedusting pond Q2 of side, cleaning shaft Q4 stretches into the one end in the Q2 of dedusting pond and is provided with liquid down tube channel showerhead Q401, wherein The end of liquid down tube channel showerhead Q401 is network structure or loose structure；Preferably, cleaning shaft Q4 is from shell of dust remover Q3 Middle part pass through.

It is preferred that, deduster Q1 also includes：The overflow water seal water pond Q5 of dedusting pond Q2 sides is located at, and in water in dust removal Between pond Q2 and overflow water seal water pond Q5, in the water level regulation hole Q301 issued by the lower end of shell of dust remover Q3 sides；More excellent Choosing, on the outside of the shell of dust remover Q3 by the Q301 of water level regulation hole is provided with card and puts groove Q302 and water level control apparatus Q6, should Water level control apparatus Q6 includes that water level regulation plate Q601, screw rod Q602, regulating valve Q603, water level regulation plate Q601 cards are placed on institute State card to put in groove Q302, one end of screw rod Q602 is connected with water level regulation plate Q601, the other end of screw rod Q602 and regulation Valve Q603 connects, wherein vertical width of the vertical width of water level regulation plate Q601 slightly larger than water level regulation hole Q301.

It is preferred that, deduster Q1 also includes：The cover plate Q501 being arranged on above overflow water seal water pond Q5, the one of cover plate Q501 End is connected with shell of dust remover Q3, in other end insertion overflow water seal water pond Q2；It is further preferred that being provided with one on cover plate Q501 Through hole, screw rod Q602 pass through the through hole.Screw rod Q602 is made to move down along on the through hole by the effect of regulating valve Q603 Dynamic, therefore drive water level regulation plate Q601 to move up and down.

It is preferred that, overflow water seal water pond Q5 tops 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 provided with overflow pipe valve Q503.

It is preferred that, be provided with filling pipe Q201 on the Q2 of dedusting pond, for in dedusting pond supplement water；Preferably, Moisturizing water pipe Q201 is provided with moisturizing pipe valve Q202.

It is preferred that, dedusting pond Q2 bottoms are funnel-form or " V " type or are rendered as inversed-cone shape, and dedusting pond Q2 bottoms 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, support Q7 is provided with above the dedusting pond Q2 in shell of dust remover Q3, be provided with below support Q7 First group of woven wire Q701 (preferably V-type screen pack or V-type woven wire) a little is punctured and on support Q7 as bubble 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 is provided with to seal blocks Q703.

It is preferred that, sprinkler head Q8 is provided with above second group of woven wire Q702, for second group of woven wire Q702 Upper sprinkling water in dust removal or dedusting liquid；Preferably, dash demisting plate Q9 is provided with above sprinkler head Q8, in dash demisting plate Q9 Net air outlet Q303 is provided with the shell of dust remover of top.

It is preferred that, deduster Q1 also includes control system Q10, hydraulic gage Q204, overflow pipe valve Q503 and moisturizing pipe valve Q202 It is connected with control system Q10, control system Q10 control hydraulic gage Q204, overflow pipe valve Q503 and moisturizing pipe valve Q202.

According to other side of the present utility model, there is provided a kind of use includes that the above-mentioned of two-stage burnt lime digester disappears Change the quicklime slaking and dust collection method with dust arrester, the method is comprised the following steps：

1) quicklime slaking：Quick lime is put in the charging aperture 2 of two-stage burnt lime digester 1, via sealing conveying Section casing 3 is transported in the first digestion section casing 4, by being located at the top of the first digestion section casing 4 or the water spray dress of sidepiece Put the quick lime material moved in 5 to first digestion section casings 4 to spray water so that quick lime is next in the stirring action of shaft While there is mixing and digest, entrance afterwards second digests next in the stirring action of shaft again in section casing 8 in side motion Side motion is while occur further to mix and digest, discharging opening 9 row of the postdigestive quick lime via 1 bottom of burnt lime digester 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 The 601 cleaning shaft Q4 for being output to wet dust collector Q1, liquid down tube channel showerhead Q401 of the dusty gas by cleaning shaft Q4 Being injected in the water of dedusting pond Q2, dedusting being carried out by contacting with water, the gas after dedusting is arranged from shell of dust remover Net air outlet Q303 is discharged.

According to of the present utility model in terms of another, there is provided a kind of using including that the above-mentioned of three-level burnt lime digester disappears Change the quicklime slaking and dust collection method with dust arrester, the method is comprised the following steps：

1) quicklime slaking：Quick lime is put in the charging aperture 2 of three-level burnt lime digester 1, via sealing conveying Section casing 3 is transported in the first digestion section casing 4, by being located at the top of the first digestion section casing 4 or the water spray dress of sidepiece Put the quick lime material moved in 5 to first digestion section casings 4 to spray water so that quick lime is next in the stirring action of shaft While there is mixing and digest, entrance afterwards second digests next in the stirring action of shaft again in section casing 8 in side motion Side motion is while occur further to mix and digest, entrance afterwards the 3rd digests the stirring in section casing 14 again in shaft and makees Moved while occurring further to mix and digest, postdigestive quick lime goes out via 1 bottom of burnt lime digester with lower 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 The 601 cleaning shaft Q4 for being output to wet dust collector Q1, liquid down tube channel showerhead Q401 of the dusty gas by cleaning shaft Q4 Being injected in the water of dedusting pond Q2, dedusting being carried out by contacting with water, the gas after dedusting is arranged from shell of dust remover Net air outlet Q303 is discharged.

Below with reference to the accompanying drawings 2～Fig. 5, the three-level for describing Fig. 5 on the basis of the two-stage digester shown in Fig. 2～Fig. 4 disappear Change device, specific embodiment of the present utility model more particularly described below.

With reference to Fig. 1, this digestion and dust pelletizing system include, slaking apparatus A, using multistage digester 1, by quick lime Q and lead to Cross the next steel-smelting sewage sludge H of sludge pump G conveyings to be added in slaking apparatus A, then by initial water supply line L0 to slaking apparatus In add water, carry out digestion operation.Limeslaker dust mainly adds water in digestion process and produces a large amount of water vapours and lime Dust, collect these dust need by closed for digester top and on closed good digester exhaust outlet directly by inhaling The external cleaning shaft of dust hood.The dust that digester is collected sends into dust arrester B by cleaning shaft together with other points dedusting J (i.e. deduster Q1).

First, 2～Fig. 4 of refer to the attached drawing, the slaking apparatus A of the system is two-stage level digester 1, including upper and lower two casees Body, upper box are divided into the first digestion section casing 4 and sealing transportation section casing 3 being connected, parallel in the first digestion section casing 4 Two the first shaft 401a and 401b driven by power set are respectively arranged with, two shafts 401a and 401b synchronously turn Dynamic and direction of rotation is conversely, the power set include that first driving means 11, first driving means 11 pass through first shaft coupling 11a First gear case 11b is connected with, two shafts 401a and 401b are respectively by first bearing seat 11c and the first gear case In 11b, intermeshing a pair of gears are connected, so as to realize synchronous backward rotate, first bearing seat 11c be located at casing 4 it Outward, and using split design, bearing working environment is good, long service life；Two stirring rod 401a and 401b are positioned at the first digestion Part in section casing 4 is provided with some scattered stirring vanes 402, the stirring vane 402 on two shafts 401a and 401b Interlaced setting (in Fig. 2, merely illustrating a shaft 401 and its stirring vane 402), two shafts 401a and 401b Be located at sealing transportation section casing 3 in part be provided with conveyor screw blade 301, sealing transportation section casing 3 top be provided with into Material mouth 2, charging aperture 2 are provided with self seal valve 201 with the junction of sealing transportation section casing 3, seal going out for transportation section casing 3 Material mouth connection first digests the head end feeding mouth of section casing 4；The tail end discharging opening of the first digestion section casing 4 is provided with digestion At casing blanking and disclose material mouth 7, material is by upper digestion casing blanking and disclosing material mouth 7 and entering lower box second and digest section casing 8 head end, also parallel in the second digestion section casing 8 is respectively arranged with two the second shaft 801a driven by power set And 801b, two shafts 801a and 801b also synchronous axial system and direction of rotation is conversely, the power set include that the second driving is filled 12 are put, the second driving means 12 are connected with second gear case 12b, two shafts 801a and 801b by second shaft coupling 12a It is connected with intermeshing a pair of gears in the second gear case 12b by second bearing seat 12c respectively, same so as to realize Step is rotated backward, and the steering of the second driving means 12 is contrary with the steering of first driving means 11；Two shaft 801a and The part that 801b is located in the second digestion section casing 8 also is provided with some scattered stirring vanes, two shafts 801a and 801b On the interlaced setting of stirring vane, the tail end of the second digestion section casing 8 is provided with discharging opening 9, in two-stage digester case Digestion casing apparatus for examination and repair 10 is additionally provided with body, is lived including digesting casing apparatus for examination and repair door 10a and digestion casing apparatus for examination and repair door Dong Lian mechanisms 10b, digestion casing apparatus for examination and repair door moving connecting mechanism 10b are installed in lower box bottom, digestion casing maintenance dress Put a 10a bottom to be connected with digestion casing apparatus for examination and repair door moving connecting mechanism 10b, door can turn around moving connecting mechanism 10b Dynamic, digestion casing apparatus for examination and repair door 10a tops are snapped connection with lower box top, i.e. digestion casing apparatus for examination and repair door 10a tops Can open and close, during maintenance, open digestion casing apparatus for examination and repair door 10a and overhauled, the apparatus for examination and repair generally expansion, Greatly facilitate the maintenance of digester.Sealing dust excluding hood 6, the height of dust excluding hood 6 are additionally provided with above the first digestion section casing 4 Gradually increase along material conveying direction, the external tapping 601 that gathers dust is additionally provided with the end of dust excluding hood 6, by the external tapping 601 that gathers dust It is connected with extraneous dust pelletizing system pipeline.Water injector 5,5 one end of water injector and initial feed pipe is additionally provided with upper box Road L0 is external, and the other end is connected with some scalable sprinkler heads 502 by automating flowmeter water valve 501, automates flowmeter Water valve 501 is electrically connected with Master Control Room to carry out Automated condtrol and there is cutting function, some scalable sprinkler heads 502 to stretch to the water yield Enter in 4 top dust excluding hood 6 of the first digestion section casing carries out shower water to material, and some scalable sprinkler heads 502 can be according to digestion The length of section casing carries out flexible adjustment, length arrangement straggly so that add water evenly, the region that adds water is wider, and the water yield is also obtained Automated condtrol.

With reference to Fig. 5, the digester shown in Fig. 5 is upper, middle and lower three-levels digester 1.Lower section in the second digestion section casing 8 It is additionally provided with the 3rd digestion section casing 14.3rd digests the 3rd shaft with stirring vane that section casing 14 is built with a pair 1401a and 1401b, this pair the 3rd shaft 1401a and 1401b are driven and two by the 3rd driving means 13 The direction of rotation of person is contrary.

The three-level slaking apparatus have the following advantages：1st, compared with single-stage digestion, digestibility increases by 2 to 3 times, digestible degree Height, the digestion process parameter of science, maximizing makes quicklime slaking complete.2nd, the part in sealing transportation section casing is provided with continuously Conveyor screw blade, seal transportation section casing inwall and continuous conveyor screw blade between formed helixseal conveying, Only allow quick lime to push ahead entrance digestion section casing, can effectively prevent steam anti-channeling to feeding mouth from causing hardened or affecting skin Belt scale weighing precision.3rd, Double shaft stirring form is adopted, with stirring, multiple action and the effects such as caking and self-cleaning is crushed；Carry High quick lime stirring frequency, is made quick lime be well mixed with water, reacts abundant；Stirrer paddle adopts manganese steel plate weld hard alloy Cutter head, increases the service life.4th, as a result of multistage digestion, the also Automated condtrol of the water yield so that digestion effect very well, The also corresponding a large amount of minimizings of the dust of generation, substantially improve the external environment condition in digestion place, and digestion region dust concentration is far below National emissions concentration standard, has administered the problem of environmental pollution of existing digestion zone.5th, section is digested for multistage digester one-level A kind of following maintenance blind spot, there is provided effective expansion repair method, solves a multistage digester maintenance difficult problem.

Quicklime slaking smoke characteristic：1st, 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 sticks on the inwall of deduster and its pipeline；2nd, 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 For 30 μm, therefore, in digestion process, quick lime dust easily diffuses with thermal current and comes, and natural subsidence is very slow, diffusion Scope is wide, and dust catching difficulty is big；3rd, the hydraulicity, quick lime add water to digest and generate Ca (OH)₂, dispersion in atmosphere 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.Raw Lime slaking smoke characteristic not only results in quick lime and sticks to cleaning shaft, hardened rear blocking pipeline, but also heavy corrosion The pole plate of electric cleaner, affects which normally to run.During using sack cleaner, also can because the hydraulicity cause cloth bag paste quickly stifled and It is forced to disable.

With reference to Fig. 1, the characteristics of for quicklime slaking flue gas, the system dust arrester B (i.e. Q1) adopts water bath dust-removing side Formula, this cleaner are to apply water-bath washing dust removal mechanism and filtering type purification techniques to purify dress in the novel combination type of one Put, efficiency of dust collection is very high.

As shown in Figure 2 and Figure 6, the dedusting interface 601 first from burnt lime digester 1 (i.e. A) will be disappeared by cleaning shaft Change ash-laden gas (via the cleaning shaft Q4 shown in Fig. 6) and access efficient quicklime slaking wet dust collector B, i.e. institute in Fig. 6 The Q1 for showing.This efficient quicklime slaking wet dust collector Q1 includes that the external limeslaker dedusting interface 601, other end in one end connects The cleaning shaft Q4 being connected to inside deduster Q1, cleaning shaft Q4 are entered in deduster Q1 through shell of dust remover Q3, dust removing tube Road Q4 stretches in deduster Q1 and is provided with liquid down tube channel showerhead Q401, and shower nozzle Q401 is that network structure or porous are tied Structure, the shower nozzle extend in housing Q3 certain position (such as depth 20-80cm), pipeline shower 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- side body Q3 lower ends There is water level regulation hole Q301, the hull outside by the perforate Q301 is provided with card and puts groove Q302, and water level regulation plate Q601 cards are placed on The card is put in groove 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 of water level regulation hole Q301 is blocked, and overflow water seal water pond Q5, overflow water seal is provided with the outside of adjustable plate Q601 Pond Q5 tops 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, and seal cover board Q501 covers part or all of overflow water seal water pond Q5, protects Card water level and steady air current, in dedusting pond, the funnel-shaped bottom portion of Q2 is provided with sewage sludge tapping equipment Q203, clear shutting down Clear mud hole Q204 is opened during reason equipment will contain the discharge of dirt water；Being provided with support Q7 above the Q2 of dedusting pond in housing Q3, Be provided with below support Q7 and one group of woven wire Q701 (preferably V-type screen pack) a little punctured as bubble, on support Q7 Side is provided with woven wire Q702 (preferably reverse V-shaped woven wire), and woven wire (Q701 and Q702) alternating inclinations are arranged, and are handed over Sealing card Q703 is provided with point, sprinkler head Q8 is provided with above woven wire Q702, for spraying on woven wire Q702 Dedusting liquid being spilt, the moisture film for flowing downward being formed on screen pack Q701 and Q702, upper and lower two groups of V-type nets (Q701 and Q702) is formed Twice filter moisture film, fully catch dust；Dash demisting plate Q9 is provided with above sprinkler head Q8, above dash demisting plate Q9 It is provided with net air outlet Q303.

The dust flue gas fetched from burnt lime digester dust removal port are entered in deduster by cleaning shaft, and cleaning shaft is inserted Enter certain position in dedusting pond, the position is determined by exhaust gas volumn, cleaning shaft inserts under water and is provided with netted knot The pipeline shower nozzle of structure；The dusty gas with certain speed is sprayed at shower nozzle at a relatively high speed through entering cleaning shaft, to water layer Enter after producing percussion in water, the direction of motion of gas changes, and grit is then continued by original side due to the effect of inertia To motion, stay in water after wherein most grit and water adhesion, netted knot of the bubble that smoke-shock water body is produced through shower nozzle Structure cuts into minute bubbles, increased the contact area of bubble and water, strengthens seizure of the water in dust removal to dust, realizes that the first order is rushed Hit formula water bath dust-removing；In water bath dust-removing, flue gas, most of dust is removed, and remainder particle dust is through two-layer V Type net, the fine dust during the moisture film of formation is to flue gas in net catch, and realize second level filtering type water film dedusting, after purification Gas through dash demisting process after from exit discharge.

With advantages below compared with traditional wet scrubber：1st, impulse type water bath dedusting technology and filtering type have been gathered Water film dedusting technological merit, targetedly captures bulky grain and fine dust, and efficiency of dust collection is up to 99.9%.2nd, can be in equipment Water level in deduster is adjusted during operation, higher purification efficiency is reached, while ensure that purifier running resistance is relatively low, equipment energy Consumption is low.3rd, using overflow water seal, the fluctuation range of liquid level in purifier cylinder is controlled well, it is ensured that purifier has Stable purification efficiency, and protective effect is served to blower fan.4th, dedusting sewage can be recycled after sewage disposal again, Sewage discharge capacity is reduced, secondary pollution is prevented.5th, the utility model simple structure, operation, easy to maintenance.

With reference to Fig. 1, the purification gas after dust arrester Q1 (or B) process, air exhauster C is connected by ventilation shaft, Air exhauster C connects chimney D again, and the flue gas after dedusting is entered air through chimney by exhausting operation by air exhauster.In chimney Simple dust arrester and moisture collection device again is also equipped with, to realize that outer air-discharging dustiness is up to state standards and moisture Collection recycling.

Sewage after the process of dust arrester Q1 (i.e. B) water bath dust-removing, imports sewage-treatment plant by sewage conduct E, sewage-treatment plant include stirring pool E1, sedimentation basin E2 and clear water reserviors E3, are provided with mixer E11 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 Recycle.And the water clarified water pump F2 in clear water reserviors is transported to cleaning device K by fresh water pipeline L2, cleaning device is to whole In system, cleaning shaft is cleaned, by cleaning after sewage import cesspool again, be circulated utilization.Under normal circumstances, Deduster, the water consumption of blower fan can be less than the digestion water consumption of limeslaker, it is necessary to system be entered by water inlet manifold road L1 Row moisturizing, the external water sources of water inlet manifold road L1, moisturizing point are designed 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 rationally using supplying water, equipment water is mainly used in water bath dust-removing, blower fan and part dedusting using clean clear water 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 in pipeline using water pump again and pipeline is cleaned, 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 mixer is stirred evenly in the stirring pool Limeslaker or other water consumptions point are squeezed into through water pump.

With reference to Fig. 1, after stirring pool and sedimentation basin are through long-term operation, bottom can be piled up sludge, and the sludge is from bottom of pond pipeline Enter filter-pressing device M, after sludge is through filter-pressing device press filtration, by dehydration after sludge be passed through in burnt lime slaking device A, by drainage Stirring pool is entered again, real mud and sewage is recycled.

Pipeline and the cleaning of 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, will be bonded in inner-walls of duct when dusty gas passes through cleaning shaft, by Gradually thicken until block, dedusting pipeline can keep unimpeded time less than one month under normal circumstances.For preventing cleaning shaft Blocking, needs to clean pipeline in time, designs cleaning device on pipeline.In order to prevent line clogging, dedusting pipeline from setting Meter should reduce horizontal pipe as far as possible and shorten pipeline distance, and consider installation site and the inspection platform of cleaning device.Water-bath is removed Still containing a small amount of lime dust and substantial amounts of water vapour, the gas of moistening is easy to cause fan blade dirt device purified gas Laying dust and fouling, occur local shedding after blade laying dust reaches certain thickness, cause impeller balance to destroy, and shaking occurs in blower fan Dynamic.In order to solve above-mentioned frequent produced problem, ash removing opening, the laying dust of periodic cleaning draught fan impeller is opened up on fan casing； And cleaning device, the laying dust that long-term spray is cleaned on fan blade in time, it is ensured that the balance of impeller are installed before air inlet.

The dust collection method of wet dust collector, the method are comprised the following steps：

(1) by filling pipe Q201 to retaining in dedusting pond, water level regulation plate Q601 is adjusted, water in the Q2 of dedusting pond is made Position reaches predetermined value, closes moisturizing pipe valve Q202；

(2) dusty gas (dust flue gas for such as fetching from burnt lime digester dust removal port) by cleaning shaft Q4 from upper and Under enter from the middle part of shell of dust remover Q3 in deduster Q1, by smoke property and the uninterrupted of flue gas, adjust water level regulation dress Q6 is put, certain position in cleaning shaft Q4 insertion dedusting pond Q2, cleaning shaft Q4 insertion under water one is provided with netted The liquid down tube channel showerhead Q401 of structure；

(3) there is the dusty gas of certain speed to flow through cleaning shaft Q4 at the liquid down tube channel showerhead Q401 at a relatively high speed Spray, water layer produced and is entered after percussion in water, the direction of motion of gas changes, and grit due to inertia effect then after Continuous original direction of pressing is moved, and is stayed in water after wherein most grit and water adhesion, and smoke-shock water body is through liquid down tube channel showerhead The network structure of Q401 cuts into minute bubbles, increased the contact area of flue gas and water, strengthens seizure of the water in dust removal to dust, Realize first order impulse type water bath dedusting；

(4) in water bath dust-removing, flue gas, most of dust is removed, and remainder particle dust is through first group of gold Category silk screen Q701 forms the second moisture film that first moisture film and second group of woven wire Q702 are formed, during twice moisture film is to flue gas Fine dust caught, realize second level filtering type water film dedusting, after purified gas is through dash demisting plate Q9 process Discharge from exit.

(5) dedusting pond Q2 has turned into sewage through prolonged dedusting, by the sewage from funnel-form or " V " type dedusting The sewage sludge tapping equipment Q203 of pond Q2 bottoms is discharged, and carries out moisturizing from filling pipe Q201.

A kind of efficient quicklime slaking and dust pelletizing system, it include digester 1, wet dust collector Q1, also include that exhausting is filled Put 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 with the external tapping 601 that gathers dust of digester 1 by a cleaning shaft Q4；Calcium hydroxide Conveying device A6 is located at the discharging opening 9 of digester (1), and batch mixer A7 is connected with Slaked lime conveying device A6, wet dust collector The net air outlet Q303 of Q1 is connected with chimney A2 by extractor fan A1, the overflow pipe Q502 of wet dust collector Q1 and except dustiness Water treatment facilities A3 connects, and the sewage sludge tapping equipment Q203 of dedusting pond Q2 bottoms is connected with sludge treatment equipment A4, is removed Dustiness water treatment facilities A3 is connected with cleaning device A5, and optionally, dusting waste water treatment device A3 and sludge treatment equipment A4 connects Connect.

Preferably, sludge treatment equipment A4 includes press filtration water out and press filtration sludge outlet, press filtration water out and cleaning Device A5 connects, and press filtration sludge outlet is connected with digester 1.

The using method of three-level burnt lime digester, the method are comprised the following steps：

(1) quicklime slaking：Quick lime is put in the charging aperture 2 of three-level burnt lime digester 1, via sealing conveying Section casing 3 is transported in the first digestion section casing 4；

(2) digested in section casing 4 to first by the water injector 5 on the top or sidepiece that are located at the first digestion section casing 4 The quick lime material water spray of motion is so that quick lime is moved while occurring to mix and disappear under the stirring action of shaft Change；

(3) enter after and moved under the stirring action of shaft while occurring again in the second digestion section casing 8 Further mix and digest；

(4) enter after and moved under the stirring action of shaft while occurring again in the 3rd digestion section casing 14 Further mix and digest, postdigestive quick lime is discharged via the discharging opening 9 of 1 bottom of burnt lime digester.

Preferably, the first digestion section casing 4 built with a pair the first shaft 401a with stirring vane 402 and 401b, this pair first shaft 401a and 401b are by first driving means 11 are driven and both rotation sides To contrary.

Preferably, the second digestion section casing 8 built with a pair the second shaft 801a with stirring vane and 801b, this pair second shaft 801a and 801b pass through 12 driven and both rotation sides of the second driving means To contrary.

Preferably, digesting the 3rd shaft 1401a with stirring vane that section casing 14 is built with a pair the 3rd And 1401b, this pair the 3rd shaft 1401a and 1401b by the 3rd driving means 13 driven and both Direction of rotation is contrary.

Preferably, a 801a in the middle of the second shaft 801a and 801b works as positioned at the first shaft 401a and 401b In a 401a underface, and their 401a and 801a direction of rotation conversely, with the 3rd shaft 1401a and A 1401a in the middle of 1401b is located at the underface of a 801a in the middle of the second shaft 801a and 801b, and they The direction of rotation of 401a and 801a is contrary.

Preferably, the input of water injector 5 is external with initial water supply line L0, output end is by automating flowmeter Water valve 501 is connected with the multiple telescopic sprinkler head 502 on the top for being located at 4 inner space of the first digestion section casing；Preferably It is that automation flowmeter water valve 501 is electrically connected to carry out the water yield Automated condtrol and there is cutting function with Master Control Room；Enter One step is preferably, and multiple scalable sprinkler heads 502 carry out flexible adjustment, length row straggly according to the length of digestion section casing Cloth.

Preferably, the hot water outlet of the externally connected heat exchanger X4 of the initial water supply line L0 of water injector 5, this changes There is hot device X4 cooling water inlet X5 and hot water outlet and the hot gas import X6 of heat to export with the cooling gas after heat exchange.

Embodiment 1

In the present embodiment, using digestion and the dust arrester for including three-level burnt lime digester 1 and deduster Q1, wherein The direction of rotation of the corresponding rotary shaft of each rotary shaft of the second level and surface is identical, and each rotary shaft of the third level Identical with the direction of rotation of the corresponding second level rotary shaft of surface.Theoretical water needed for quicklime slaking is quick lime The 32wt% of weight.In the present embodiment, the speed in water spray guarantees that the amount that sprays water accounts for the 70wt% of quick lime weight.

Quicklime slaking and dust collection method, the method are comprised the following steps：

1) quicklime slaking：Quick lime is put in the charging aperture 2 of three-level burnt lime digester 1, via sealing conveying Section casing 3 is transported in the first digestion section casing 4, by being located at the top of the first digestion section casing 4 or the water spray dress of sidepiece Put the quick lime material moved in 5 to first digestion section casings 4 to spray water so that quick lime is next in the stirring action of shaft While there is mixing and digest, entrance afterwards second digests next in the stirring action of shaft again in section casing 8 in side motion Side motion is while occur further to mix and digest, entrance afterwards the 3rd digests the stirring in section casing 14 again in shaft and makees Moved while occurring further to mix and digest, postdigestive quick lime goes out via 1 bottom of burnt lime digester with lower 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 The 601 cleaning shaft Q4 for being output to wet dust collector Q1, liquid down tube channel showerhead Q401 of the dusty gas by cleaning shaft Q4 Being injected in the water of dedusting pond Q2, dedusting being carried out by contacting with water, the gas after dedusting is arranged from shell of dust remover Net air outlet Q303 is discharged.

After continuously running 10 days, discharging opening does not have blockage phenomenon.

The dust removing effects of deduster Q1 are higher than 99.6%.

In normal operating process, with the identical time interval of 20 seconds from the discharging opening 9 of 1 bottom of burnt lime digester Sampling is analyzed.

Embodiment 2

Repeat embodiment 1, using the digestion and dust arrester that include two-stage burnt lime digester 1, simply the second level is every The direction of rotation of the one rotary shaft rotary shaft corresponding with surface is conversely, and each rotary shaft of the third level and surface The direction of rotation of corresponding second level rotary shaft is contrary.

After continuously running 10 days, discharging opening does not have blockage phenomenon.

The dust removing effects of deduster Q1 are higher than 99.7%.

In normal operating process, with the identical time interval of 20 seconds from the discharging opening 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 discharging opening sampling of burnt lime digester with the identical time interval of 20 seconds.Discharging opening has clogging, needs Take periodically (about 3 days) cleaning discharging openings.

Embodiment 3

A kind of efficient quicklime slaking and dust pelletizing system, it include digester 1, wet dust collector Q1, also include that exhausting is filled Put 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 with the external tapping 601 that gathers dust of digester 1 by a cleaning shaft Q4；Calcium hydroxide Conveying device A6 is located at the discharging opening 9 of digester (1), and batch mixer A7 is connected with Slaked lime conveying device A6, wet dust collector The net air outlet Q303 of Q1 is connected with chimney A2 by extractor fan A1, the overflow pipe Q502 of wet dust collector Q1 and except dustiness Water treatment facilities A3 connects, and the sewage sludge tapping equipment Q203 of dedusting pond Q2 bottoms is connected with sludge treatment equipment A4, is removed Dustiness water treatment facilities A3 is connected with cleaning device A5, and optionally, dusting waste water treatment device A3 and sludge treatment equipment A4 connects Connect.

Embodiment 4

Repeat embodiment 3, simply sludge treatment equipment A4 includes press filtration water out and press filtration sludge outlet, press filtration water out It is connected with cleaning device A5, press filtration sludge outlet is connected with digester 1.

Result of the test：

The size distribution of the white lime obtained after digestion is measured using Malvern (Malvern) particle size analyzer for sample Index I, as a result as follows：

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 less, show epigranular.In addition, embodiment 2 In particle size distribution index I numerical value amplitude of variation minimum, show that the digestion of whole digestion process is highly uniform.

The utility model can solve that existing digester digestive efficiency is low, dust collector efficiency is low completely, cleaning shaft stifled A series of problems, such as plug, the vibration of blower fan, sewage sludge are recycled, it is ensured that dust pelletizing system can be run steadily in the long term.Raw stone Grey digestibility is very high, and dust, the collecting effect of steam can also reach more than 99%, and after purification, the concentration of emission of exhaust gas dust is far little In the discharge standard of national regulation, the purpose of energy-conserving and environment-protective is also realized.

Claims (37)

1. burnt lime digester (1), it includes：Charging aperture (2), the sealing transportation section casing that front end is connected with charging aperture (2) (3) the first digestion section casing (4), being connected with the rear end of sealing transportation section casing (3), positioned at the first digestion section casing (4) Top or sidepiece water injector (5)；The sealing dust excluding hood (6) being located at the top of the first digestion section casing (4), disappears positioned at first Change in section casing (4) and away from the upper digestion casing blanking of that one end of charging aperture (2) and material mouth (7) is disclosed, disappear positioned at first Change the second digestion section casing (8) below section casing (4), in the second digestion section casing (8) and near charging aperture (2) that The second of one end digests at casing blanking and discloses material mouth (7a), the 3rd digestion section case below the second digestion section casing (8) Body (14), the discharging opening (9) of that one end in the 3rd digestion section casing (14) and away from charging aperture (2)；Wherein：First Digestion section casing (4) built with a pair of the first shaft (401a, 401b) with stirring vane (402), this pair the Both are driven by first driving means (11) and both direction of rotation is contrary for one shaft (401a, 401b)；? Two digestion section casing (8) second are stirred for this pair built with a pair of the second shaft (801a, 801b) with stirring vane Both are driven by the second driving means (12) and both direction of rotation is contrary to mix axle (801a, 801b)；Disappear the 3rd Change section casing (14) built with a pair of the 3rd shaft (1401a, 1401b) with stirring vane, the 3rd stir for this pair Both are driven by the 3rd driving means (13) and both direction of rotation is contrary to mix axle (1401a, 1401b)；With sealing Dust excluding hood (6) has the external tapping (601) that gathers dust；Wherein：The length of three-level digester is 3-30m.

2. according to claim 1 to burnt lime digester (1), wherein, the length of three-level digester is 4-20m.

3. according to claim 1 to burnt lime digester (1), wherein, in the middle of the second shaft (801a, 801b) (801a) be located at the first shaft (401a, 401b) in the middle of one (401a) underface, and their (401a) and (801a) both direction of rotation are conversely, stir positioned at second with (1401a) in the middle of the 3rd shaft (1401a, 1401b) Mix the underface of (801a) in the middle of axle (801a, 801b), and their (401a) and (801a) both direction of rotation On the contrary.

4. burnt lime digester (1) according to any one of claim 1-3, wherein, the input of water injector (5) with Initial water supply line (L0) is external, and output end is by automating flowmeter water valve (501) and being located in the first digestion section casing (4) Multiple telescopic sprinkler head (502) connection on the top in portion space；And/or

Above the first digestion section casing (4), the height of set sealing dust excluding hood (6) is along the material conveying side of the casing (4) To gradually increasing, the external tapping that gathers dust (601) is located at the end of dust excluding hood 6, by the external tapping that gathers dust (601) and extraneous dedusting The pipeline of device or dust pelletizing system is connected.

5. according to claim 4 to burnt lime digester (1), wherein, automation flowmeter water valve (501) is electric with Master Control Room Connection to carry out Automated condtrol and to there is cutting function to the water yield.

6. according to claim 5 to burnt lime digester (1), wherein, multiple scalable sprinkler head (502) are according to digestion section The length of casing carries out flexible adjustment, length arrangement straggly.

7. at the beginning of burnt lime digester (1) according to any one of claim 1-3 or 5-6, wherein water injector (5) The hot water outlet of the externally connected heat exchanger (X4) of beginning water supply line (L0), the heat exchanger (X4) have cooling water inlet (X5) and Cooling gas outlet after the hot gas import (X6) of hot water outlet and heat and heat exchange.

8. according to claim 4 to burnt lime digester (1), the initial water supply line (L0) of wherein water injector (5) connects It is connected to the hot water outlet of the heat exchanger (X4) of outside, the heat exchanger (X4) has cooling water inlet (X5) and hot water outlet and heat Cooling gas outlet after hot gas import (X6) and heat exchange.

9. burnt lime digester (1) according to any one of claim 1-3,5-6 or 8, wherein, in three-level quick lime Digestion casing apparatus for examination and repair (10) is additionally provided with the casing of digester (1), and the apparatus for examination and repair (10) includes one or more digestion Casing apparatus for examination and repair door (10a) and one or more digestion casing apparatus for examination and repair door activities connect mechanism (10b).

10. according to claim 4 to burnt lime digester (1), wherein, on the casing of three-level burnt lime digester (1) Digestion casing apparatus for examination and repair (10) is additionally provided with, the apparatus for examination and repair (10) includes one or more digestion casing apparatus for examination and repair doors (10a) with one or more digestion casing apparatus for examination and repair doors activity even mechanism (10b).

11. burnt lime digester (1) according to claim 9, wherein, one or more digestion casing apparatus for examination and repair doors are lived Dynamic bindiny mechanism 10b is installed in the bottom of the second casing or while is installed in the second casing and the respective bottom of the 3rd casing Portion, the bottom for digesting casing apparatus for examination and repair door (10a) are connected with digestion casing apparatus for examination and repair door moving connecting mechanism (10b), door (10a) can rotate around the moving connecting mechanism (10b), digest top and the lower box top card of casing apparatus for examination and repair door (10a) Button connection, i.e., digestion casing apparatus for examination and repair door (10a) top can be opened and be closed.

12. quicklime slakings and dust arrester, it include the digester (1) according to any one of claim 1-11 and Wet dust collector (Q1), the latter are connected with the external tapping that gathers dust (601) of digester (1) by a cleaning shaft (Q4)；

Wherein wet dust collector (Q1) includes：

Dedusting pond (Q2)；

The shell of dust remover (Q3) being located above dedusting pond (Q2)；

Cleaning shaft (Q4),

It is characterized in that：One end of cleaning shaft (Q4) is external to one or more output ends containing dusty gas collection device, The other end through shell of dust remover (Q3) and is stretched in the dedusting pond (Q2) below shell of dust remover (Q3), dedusting from top to bottom Pipeline (Q4) stretches into the one end in dedusting pond (Q2) and is provided with liquid down tube channel showerhead (Q401), wherein liquid down tube channel showerhead (Q401) end is network structure or loose structure.

13. quicklime slakings according to claim 12 and dust arrester, it is characterised in that：Cleaning shaft (Q4) is from dedusting The middle part of device housing (Q3) passes through.

14. quicklime slakings according to claim 12 or 13 and dust arrester, it is characterised in that：The deduster (Q1) is also Including：The overflow water seal water pond (Q5) of dedusting pond (Q2) side is located at, and in dedusting pond (Q2) and overflow water seal water pond (Q5) between, in the water level regulation hole (Q301) issued by the lower end of shell of dust remover (Q3) side.

15. quicklime slakings according to claim 14 and dust arrester, it is characterised in that：At water level regulation hole (Q301) Card being provided with the outside of other shell of dust remover (Q3) and putting groove (Q302) and water level control apparatus (Q6), the water level control apparatus (Q6) are wrapped Water level regulation plate (Q601), screw rod (Q602), regulating valve (Q603) is included, water level regulation plate (Q601) card is placed on the card and puts groove (Q302) in, one end of screw rod (Q602) is connected with water level regulation plate (Q601), the other end of screw rod (Q602) and regulation Valve (Q603) connects, wherein vertical width of the vertical width of water level regulation plate (Q601) slightly larger than water level regulation hole (Q301).

16. quicklime slakings according to claim 14 and dust arrester, it is characterised in that the deduster (Q1) is also wrapped Include：The cover plate (Q501) being arranged on above overflow water seal water pond (Q5), one end of cover plate (Q501) is with shell of dust remover (Q3) even Connect, in other end insertion overflow water seal water pond (Q2).

17. quicklime slakings according to claim 15 and dust arrester, it is characterised in that the deduster (Q1) is also wrapped Include：The cover plate (Q501) being arranged on above overflow water seal water pond (Q5), one end of cover plate (Q501) is with shell of dust remover (Q3) even Connect, in other end insertion overflow water seal water pond (Q2).

18. quicklime slakings according to claim 16 or 17 and dust arrester, it is characterised in that：Open on cover plate (Q501) There are a through hole, screw rod (Q602) to pass through the through hole.

19. quicklime slakings according to claim 14 and dust arrester, 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.

20. quicklime slakings according to any one of claim 15-17 and dust arrester, it is characterised in that：Overflow water Water shutoff pond (Q5) top is provided with overflow pipe (Q502), for adjusting the water level in overflow water seal water pond.

21. quicklime slakings according to claim 19 and dust arrester, it is characterised in that：Overflow pipe (Q502) is provided with Overflow pipe valve (Q503).

22. quicklime slakings according to claim 20 and dust arrester, it is characterised in that：Overflow pipe (Q502) is provided with Overflow pipe valve (Q503).

23. quicklime slakings according to any one of claim 12,13,15-17,19,21 or 22 and dust arrester, its It is characterised by：Be provided with filling pipe (Q201) on dedusting pond (Q2), for in dedusting pond supplement water.

24. quicklime slakings according to claim 14 and dust arrester, it is characterised in that：Set on dedusting pond (Q2) Be equipped with filling pipe (Q201), for in dedusting pond supplement water；Moisturizing water pipe (Q201) is provided with moisturizing pipe valve (Q202).

25. quicklime slakings according to claim 23 and dust arrester, it is characterised in that：Set on moisturizing water pipe (Q201) There is moisturizing pipe valve (Q202).

26. quicklime slakings according to any one of claim 12,13,15-17,19,21,22,24 or 25 and dedusting Device, it is characterised in that：Dedusting pond (Q2) bottom is funnel-form or " V " type or is rendered as inversed-cone shape；Dedusting pond (Q2) bottom is provided with sewage sludge tapping equipment (Q203).

27. quicklime slakings according to claim 14 and dust arrester, it is characterised in that：Dedusting pond (Q2) bottom is Funnel-form or " V " type are rendered as inversed-cone shape；Dedusting pond (Q2) bottom is provided with sewage sludge tapping equipment (Q203)；? Hydraulic gage (Q204) is additionally provided with sewage sludge tapping equipment (Q203).

28. quicklime slakings according to claim 26 and dust arrester, it is characterised in that：In sewage sludge tapping equipment (Q203) hydraulic gage (Q204) is additionally provided with.

29. quick limes according to any one of claim 12,13,15-17,19,21,22,24,25,27 or 28 disappear Change and dust arrester, wherein above the dedusting pond (Q2) in shell of dust remover (Q3), be provided with support (Q7), in support (Q7) be provided with below first group of woven wire (Q701) a little is punctured as bubble and be provided with second above support (Q7) Group woven wire (Q702).

30. quicklime slakings according to claim 14 and dust arrester, the dedusting wherein in the shell of dust remover (Q3) Support (Q7) is provided with above pond (Q2), is provided with and punctures first group of woven wire a little as bubble below support (Q7) (Q701) and second group of woven wire (Q702) is provided with above support (Q7).

31. quicklime slakings according to claim 29 and dust arrester, wherein first group woven wire (Q701) are V-type Screen pack or V-type woven wire, second group of woven wire (Q702) are reverse V-shaped woven wire；First group of woven wire (Q701) And/or second group of woven wire (Q702) alternating inclinations arrangement, point of intersection is provided with to seal blocks (Q703).

32. quicklime slakings according to claim 29 and dust arrester, wherein on second group of woven wire (Q702) Side is provided with sprinkler head (Q8), for above spraying water in dust removal or dedusting liquid to second group of woven wire (Q702).

33. quicklime slakings according to claim 30 or 31 and dust arrester, wherein in second group of woven wire (Q702) sprinkler head (Q8) is provided with above, for above spraying water in dust removal or dedusting liquid to second group of woven wire (Q702)；? Dash demisting plate (Q9) is provided with above sprinkler head (Q8), is being provided with headroom above dash demisting plate (Q9) on shell of dust remover Gas exports (Q303).

34. quicklime slakings according to claim 32 and dust arrester, wherein, are provided with gear above sprinkler head (Q8) Water demisting plate (Q9), is provided with net air outlet (Q303) on shell of dust remover above dash demisting plate (Q9).

35. quicklime slakings according to claim 28 or 32 and dust arrester, the deduster (Q1) also include control system System (Q10), hydraulic gage (Q204), overflow pipe valve (Q503) and moisturizing pipe valve (Q202) are connected with control system (Q10), control system System (Q10) control hydraulic gage (Q204), overflow pipe valve (Q503) and moisturizing pipe valve (Q202).

36. quicklime slakings and dust pelletizing system, it include digester (1) according to any one of claim 1-35, Wet dust collector (Q1), also includes extractor fan (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) pass through a dedusting Pipeline (Q4) is connected with the external tapping that gathers dust (601) of digester (1)；Slaked lime conveying device (A6) is located at digester (1) Discharging opening (9) place, batch mixer (A7) are connected with Slaked lime conveying device (A6), the net air outlet of wet dust collector (Q1) (Q303) it is connected with chimney (A2) by extractor fan (A1), at the overflow pipe (Q502) of wet dust collector (Q1) and dedusting sewage Reason device (A3) connection, the sewage sludge tapping equipment (Q203) of dedusting pond (Q2) bottom is with sludge treatment equipment (A4) even Connect, dusting waste water treatment device (A3) is connected with cleaning device (A5), optionally, at dusting waste water treatment device (A3) and sludge Reason device (A4) connection.

37. quicklime slakings according to claim 36 and dust pelletizing system, it is characterised in that：Sludge treatment equipment (A4) is wrapped Press filtration water out and press filtration sludge outlet is included, press filtration water out is connected with cleaning device (A5), press filtration sludge outlet and digester (1) connect.