CN1100125C - Equipment and process for producing clean coal series - Google Patents
Equipment and process for producing clean coal series Download PDFInfo
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- CN1100125C CN1100125C CN 00101796 CN00101796A CN1100125C CN 1100125 C CN1100125 C CN 1100125C CN 00101796 CN00101796 CN 00101796 CN 00101796 A CN00101796 A CN 00101796A CN 1100125 C CN1100125 C CN 1100125C
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Abstract
The present invention relates to a production device and a method for varieties of coal. The production device is provided with a coal flow path device and a gas flow path device; the production method comprises the following steps: carrying out coarse sieving, pulverization and sorting, carrying out activating treatment for fine particle coal, and selecting fine coarse particle coal and gangue from the coarse particle coal; stirring, sprinkling and activating the fine coarse grain coal, outputting the fine coarse grain coal or mixing with flake coal so as to mixed coal. Coal powder pellets are formed by stirring and activating coal powder, or adulterating agents and wash peat coal recovered by a system are added in the coal powder so as to form the flake coal or briquettes by mixing molding. The present invention has the advantages of less initial investment, low operating cost, good adaptability of the varieties of coal and product markets, little pollution, simple equipment and simple and convenient repair and installation.
Description
The present invention relates to a kind of production equipment and method of coal kind.
Clean coal technology is coal is realized product, equipment and the technology of high-level efficiency utilization, low pollution emission in exploitation, processing, conversion, burning whole process a general name.With China is example, and coal accounts for primary energy source more than 70%, about 11.5 hundred million tons of year consumption, and coal consumption is big, seriously polluted to be the difficult problem of restriction economy and society development all the time.
If: the granularity d=(x of coal
i～x
I+1), unit is mm (following summary).Raw coal size d is generally less than 300, the factory of coal in China screening at present adopts dry type mechanical grading mode more, and according to national standard, the screening product is in respect of common 10 kinds of three major types of fine coal (d＜6), beans (d=6～13) and lump coal (d＞13).Bunker coal generally provides mixed coal (d＜50) or smalls (d＜13 or d＜25).
The break flour rate is very high in China's raw coal, and the fine coal of general d＜6 accounts for 50%, and the break flour of d＜0.5 accounts for 20%～30%, and in general, granularity is littler, and combustible content is higher.Be made for fuel in the raw coal more than 80%, wherein: Industrial Boiler and industrial furnace (hereinafter to be referred as roasting kiln) year consumption is consumed about 400,000,000 tons station boiler year, in the roasting kiln more than 400,000,000 tons, grate furnace accounts for 90%, and fluidizing furnace (containing circular fluid bed) accounts for 10%.The station boiler overwhelming majority is a coal-powder boiler.
As everyone knows: the coal dust bits of granularity d＜3 are to cause the grate furnace operating mode to worsen, and thermo-efficiency descends, the one of the main reasons of dust pollution; The fine powder of d＜0.5 is that fluidizing furnace flying dust amount is big, unburned carbon in flue dust is high is that coal consumption is big, heavy-polluted deciding factor; The coal-grinding power consumption is the important economic and technical norms of coal-powder boiler.The mixed coal supply of material, scatter fire of raw coal, bull processing are the basic reasons that causes above-mentioned waste and pollution.
In the CN1235187A patent application, the inventor provides a kind of Bed for Fine Coal and manufacturing method and apparatus thereof, it be with feed coal through screen screened coal, again through separate Bed for Fine Coal.Tripping device is that gas divides tower, it is provided with the column tower body that stands, fluidized-bed is formed by tower wall, air distribution plate, discharge tube and isobaric bellows in the bottom, discharge tube places the central lower of air distribution plate and passes the tower body bottom, isobaric bellows place the below of air distribution plate, establish blast inlet and pressure tap at isobaric bellows sidewall, offer clean-out door in isobaric bellows bottom; The top of tower body sets out the air port, establishes coal feeding hole in the tower body upper portion side wall, is provided with the coal spread wind nozzle below coal feeding hole; Be provided with hagioscope at fluidized-bed aspect height; Above tower body sidewall, air distribution plate, offer inspection manhole.In the CN1235189A patent application, the inventor provides a kind of moulded coal and manufacturing method and apparatus thereof, and it adopts fluidized-bed dry stove of moulded coal float stem and moulded coal dehumidification system, adopts adulterating agent, binding agent and additive etc.
The object of the present invention is to provide a kind of production to be adapted to the optimal morphology of different combustion systems or purposes, the clean coal row product production device and the processing method of proterties.
According to different combustion systems or purposes, existing granularity d regulation with clean coal is as follows.
1) coal dust granule: the d＜x of coal dust
1(industry x commonly used
1=0.3～1.0), granule be irregular waterproof powder group.
2) Bed for Fine Coal: d=x
1～x
2, domestic x commonly used
2=5～10, be exclusively used in fluidizing furnace.
3) Coarse Coal: d=x
2'～x
3, being applicable to grate furnace, suitable granularity is different because of coal.Desirable: hard coal d=x
2'～x
3=3～15; Bituminous coal, brown coal d=x
2'～x
3=3～20.
4) lump coal: d=x
3～x
4, industry x commonly used
4=50.
5) sheet moulded coal, be called for short the sheet coal: the condensation of the irregular laminar or strip of thickness δ=7～10, tachy sterol, water-proof coal, be applicable to grate furnace.
6) type mixed coal: the propellant combination of sheet coal and Coarse Coal is applicable to grate furnace.
7) gasification briquette: be globoid, i.e. coal briquette.
Production equipment comprises the gentle flow path device of coal flow path device.The coal flow path device is provided with the raw coal coarse fraction and crusher, feeder, fluidized-bed pneumatic separation tower (dividing tower hereinafter to be referred as gas), coal dust capture storehouse (hereinafter to be referred as the powder storehouse), tablets press, mixing machine, shaper, coal picker, activating apparatus, stirring conveyor and pipeline thereof; The air-flow range device is provided with roasting kiln, main air blower, gas blower, tail gas washing tower, settling tank, air valve and pipeline.
The coal export of raw coal coarse fraction and crusher connects the feeder inlet, and the feeder outlet connects the coal feeding hole that gas divides tower.Gas divides the coal dust air outlet, top of tower to connect the powder storehouse, and the discharge in powder storehouse connects tablets press and mixing machine respectively, and the outlet of mixing machine connects shaper, so that make sheet coal and coal briquette; Gas divides the upper mass coal export of tower to connect coal picker, exports smart lump coal and spoil through coal handling plant; Gas divides the makeup of taking over a job of the upflow tube of tower to put, again by transfer roller output Bed for Fine Coal; Gas divides the discharge tube of the air distribution plate lower-most point of tower to connect air-dense medium fluidized-bed coal picker, again through stirring conveyor output Coarse Coal.
The air-flow range device is a double-circuit system, and the feeding warehouse of roasting kiln connects the spoil outlet of air-dense medium fluidized-bed coal picker, and the blast inlet of roasting kiln connects gas blower, and the exhanst gas outlet of roasting kiln connects gas through smoke valve and divides the tower inlet mouth.Main air blower exports one the tunnel and connects gas through the circulation air valve and divide the tower inlet mouth, and another road connects tail gas washing tower through exhaust gas valve.The washing water outlet of tail gas washing tower connects settling tank, and the mud coal outlet of settling tank connects mixing machine.The main air blower import connects pneumatic outlet after the filter in powder storehouse through controlling valve, gas divides the coal dust air outlet of tower to connect powder storehouse inlet mouth.The outlet of pressure lock connects gas and divides the tower inlet mouth.
The producing and manufacturing technique of clean coal row product is as follows:
1. raw coal is through coarse fraction and break process, coal particle size d＜x
4Mixed coal through the feeder branch tower sorting of supplying gas: 1) d＜x
1Coal dust send into the powder storehouse; 2) d=x
3～x
4Lump coal obtain smart lump coal and spoil through coal picker, export by coal conveyor; 3) d=x
1～x
2Bed for Fine Coal send the activating apparatus activation treatment, after flooding, export by transfer roller; 4) d=x
2'～x
3Coarse Coal send into air-dense medium fluidized-bed coal picker, sub-elect (1) smart Coarse Coal, through stirring, export after the spray activation treatment, or be mixed into the type mixed coal with the sheet moulded coal; (2) spoil send internal fired furnace or output.
By the coal dust of powder storehouse output through stirring, and the Paniculate coal that adds viscosity aqueous activator, dispersion agent, setting accelerator and allocate into when needing forms the output of coal dust granule after granulation.
3. add the washing mud coal of adulterating agent and system recoveries by the coal dust of powder storehouse output, make sheet coal or coal briquette through mixing, moulding.
Decision burning of coal or gasification rate depend on the reactive behavior of coal tar (being the fixed carbon of coal), therefore the measure that improves the coal tar reactive behavior are called the poling processing technique method of coal.Said poling processing technique method is:
1) dipping, spray activating process: with the salt of potassium, sodium or the aqueous solution of oxide compound is activator, and Bed for Fine Coal or Coarse Coal are carried out osmotic treated, and with industrial common used in industry NaCl, its consumption only is 0.1%～1.0% of a coal.
2) coal dust granulation activating process: add stirring-granulating in the coal dust with water glass (water glass) aqueous solution, dispersion agent, setting accelerator, make coal dust agglomerating granular.
Outstanding advantage of the present invention is:
1. economy:
1) initial outlay is few: through measuring and calculating, and a cover year 1000000 tons of hard coals of processing, production Series Industrial fuel clean coal, gasification briquette and select the device of cleaned coal, primary device and installation work are invested about 5,000,000 yuan, and power house need about 2000M
2And at present Shanxi * * 200,000 tons of/year moulded coal source mill that group plans to build, planned investment (utilizing existing soil and dispatch from foreign news agency, Wai Shui) is just up to 2,100 ten thousand yuan, another group plans to build 150,000 tons/model year coal works, and planned investment (utilizing existing soil, water, electricity, factory building) then reaches 1,500 ten thousand yuan.
2) running cost are low: owing to fully rationally utilized former coal spontaneous grade, almost exempted the comminution process that coal is processed first power consumption.Through measuring and calculating, the only about 2KWh/ ton of the comprehensive power consumption of megaton device; The moulded coal technology of low admixture dosage guarantees that the clean coal adulterating agent of fuel cost is lower than 10 yuan of/ton moulded coals, make the type mixed coal after, then further reduce to about 3 yuan/ton; Utilize the coal separation spoil to make fuel, make drying, the operation fuel cost of heating is almost nil; Productivity is very high, is suitable for realizing programming automation control, the average direct production rate of megaton device (in the Straight Run operation) can reach 3.0 ten thousand tons/more than the man-year.Gasification briquette ton coal adulterating agent expense is lower than 20 yuan, the adulterating agent add-on is lower than 3%, and can activate, regulate ash fusion point, freeze proof, realizes the drying operation serialization, thereby can make high carbon content, the low-cost high-quality gasification coal briquette of high strength, high thermal stability, high ash melting point and tool water resisting property.
2. adaptability:
1) coal adaptability: applicable to different varieties, the raw coal processing industry of different humidity, different ash.When adopting high sulphur coal, only need an amount of Wingdale of increase or slaked lime to make sulphur-fixing agent and add.
2) produce market adaptability: clean product of coal has almost been contained the kind demand of all bunker coals, feed coal, and can in time regulate and control the output share of spare unit kind according to market demands.For example, when the target market did not need Bed for Fine Coal, then Bed for Fine Coal can be used for making sheet coal (need not to pulverize again).
3. each link, the equipment that produce the coal dust pollution all are in negative pressure state, thoroughly overcome the dust pollution question of coal processing enterprise.Except that unnecessary spoil, production equipment is " three a do not have " contaminated system basically.Simultaneously, all products all realize not having break flourization, have a water resisting property, water-permeable, thereby can store up (except the gasification briquette), long-distance operation in the open, and the dust society of having eliminated each cargo handling operation pollutes.
The equipment that adopted of device is most to be existing standard equipment in market or simple and easy non-standard equipment, and specific equipment mainly contains: the fluidized-bed strength is selected tower and powder storehouse, so equipment is simple, and less investment, installation and maintenance are easy.
Fig. 1 is clean coal row product production device and producing and manufacturing technique figure.
Fig. 2 is a fluidized-bed pneumatic separation tower structure synoptic diagram.
Fig. 3 is a powder chamber structure synoptic diagram.
Fig. 4 is the A-A sectional view of Fig. 3.
Fig. 5 is the B-B sectional view of Fig. 4.
Fig. 6 is powder storehouse turnover tracheae connecting process schema.
As shown in Figure 1, clean coal row product production device is made up of the gentle flow path device of coal flow path device.The coal flow path device is provided with coarse fraction and crusher 1, feeder 2, gas divide tower 3, powder storehouse 4, tablets press 5, mixing machine 6, shaper 7, lump coal and spoil coal picker 8, activating apparatus 9, transfer roller 10, air-dense medium fluidized-bed coal picker 11, twin shaft stirring conveyor 12 and corresponding pipeline.The air-flow range device is provided with internal fired furnace 13, main air blower 14, gas blower 15, tail gas washing tower 16, settling tank 17, air valve 18～22 and corresponding pipeline.
The present invention is further illustrated below in conjunction with its producing and manufacturing technique.
Raw coal is sent into through coarse fraction and break process coal particle size d＜x from coarse fraction and crusher 1
4Mixed coal send into gas through the screw-type coal distributor 2 that can not have a magnitude speed governing and divide tower 3, in tower by under the effect of air upflow, group sieve and fluidized-bed by classification, and carry out synchronously with dry or the operation of heating, like this, mixed coal is elected as by branch in tower from top to bottom:
1) d＜x
1Coal dust carried under one's arms by air upflow and leave gas and divide tower 3, enter coal dust and capture storehouse 4, coal dust is captured and stores in the storehouse.As required, be processed into variant production, as follows:
(1) coal dust enters tablets press 5; and the Paniculate coal that adds the aqueous activator of viscosity, dispersion agent, setting accelerator and allocate into when needing, the D of general designation as Fig. 1 forms granule in tablets press; and have a water resisting property and certain intensity, can guarantee that product does not produce dust pollution and air storage in the operation operation.
(2) coal dust enters mixing machine 6, and adds binding agent, sulphur-fixing agent, activator, the agent of tachy steroling, frostproofer, the coal blending of various needs, and the washing mud coal of general designation adulterating agent C (see figure 1) and system recoveries enters shaper 7 after mixing, make sheet coal or coal briquette.The prescription of adulterating agent C and sheet coal processing mold, gasification briquette drying machine are referring to CN1235189A application for a patent for invention " moulded coal and manufacturing method and apparatus thereof ", it can satisfy the requirement of system's serialization operation, said shaper can be pair roller type briquetting press, ram-type coal sheet machine and pair roller type coal sheet machine etc., to the latter, the pressure roller that the different operating face can be arranged, the interdental space of pressure roller can equate or not wait that desirable pressure roller crown gap is 1～3mm.The processing of pressure roller working face, general first car is made the rip cutting tooth, the assembling of crosscut tooth embedding formula.The continuous face that pressure roller crown gap forms in the production will rupture, and form the igniting uneven fracture.
2) d=x
3～x
4Lump coal divide tower 3 tops to discharge (referring to Fig. 2) from gas, send into coal picker 8, obtain smart lump coal and spoil, export through coal handling plant.
3) d=x
1～x
2Bed for Fine Coal under the activation solution E metal line of the liquid bath that gas divides that the upflow tube (referring to Fig. 2) of tower 3 draws off, upflow tube inserts activating apparatus 9, form water seal, Bed for Fine Coal is sent by transfer roller 10 after flooding.
4) d=x
2'～x
3Coarse Coal divide the discharge tube, transfer roller etc. of air distribution plate (referring to Fig. 2) lower-most point of tower 3 to send into air-dense medium fluidized-bed coal picker 11 from gas, sub-elect cleaned coal and send into twin shaft stirring conveyor 12, and spray activation solution E.The smart Coarse Coal of activated processing can use separately, also can be mixed into the type mixed coal with the sheet coal; The spoil supplying apparatus internal fired furnace 13 that sub-elects is made fuel.
The air-flow journey divides tower 3, powder storehouse 4 to be coupled to a closure with respective lines and control valve 18～22 by main air blower 14, gas blower 15, roasting kiln 13, tail gas washing tower 16, settling tank 17 with gas---open double-circuit system, and as Fig. 1.When raw coal moisture content be lower than 8%, when moulding process does not have particular requirement to the coal dust temperature, the air-flow journey is the cycle operation system of a closure.At this moment: answer ON cycle air valve 18, close smoke valve 19, pressure lock 20, exhaust gas valve 21, and come the Control Circulation gas velocity with the controlling valve 22 of main air blower 14 inlet line.Circulation gas is sent into gas by main air blower 14 outlets and is divided tower 3, the separation and the coal dust of carrying under one's arms leave gas and divide tower, enter powder storehouse 4, coal dust is captured, filters and store in the storehouse, filter back gas enters main air blower 14 source lines, form a closed circulation system, circulation gas is filtered back fuel gas and dust content and can be reached a kind of equilibrium state, and do not influence system works in working order down.
When raw coal is wetter, be unsuitable for strength and separate, or temperature＜0 ℃, being unsuitable for cement is the pulverized coal forming technology of main binder, in the time of need carrying out synchronous drying or heat operation, then the air-flow journey is an open system, and gas is a kind of high-temperature flue gas and Air mixing gas.At this moment: answer shut-off valve 18, open valve 19～21, start gas blower 15, ignition combustion stove 13, the high-temperature flue gas of generation and the freezing air through being close to road pressure lock 20 form gas mixture, send into gas and divide tower 3, carry under one's arms and enter powder storehouse 4 behind the coal dust, filter back gas after main air blower 14 is sent into tail gas washing tower 16 and is carried out wet dust removal, waste gas dumps, washing water flow into settling tank 17, the coal dust post precipitation is pulled out and is made for the shaping raw material coal.
Below the activating process of coal is done an explanation: coal tar is that the crystalline state with the graphite lattice exists, the oxide compound or the salt time-like that in coal, contain basic metal, alkaline-earth metal etc., under hot conditions, can twist the carbon lattice, carry high-carbon oxidation and reducing activity, thereby quicken the burning or the gasification rate of carbon, wherein obvious with potassium, sodium element especially.Industrial application proves, when adding micro-NaCl in coal, can make its time that burns shorten 20%～25%.The activating process of this device coal comprises: the activation solution spray stirring of Bed for Fine Coal activation solution dipping, Coarse Coal or the coal dust granulation of dipping and viscous fluid activator, and division is as follows:
1) dipping spray activating process: the salts solution with potassium, sodium is an activator, is used for the osmotic treated of Bed for Fine Coal or Coarse Coal.Because thin, Coarse Coal has all been removed break flour, be the gravel shape, water-permeable is fabulous, and granularity is little, mass dryness fraction is big, very easily adsorption activation liquid, and need not to take off liquid and handle, industrial application is often got cheap industrial NaCl, and its consumption only is 0.1%～0.3% of a coal, and ton coal activator cost is below 1 yuan, and activation treatment equipment is simple, technology is easily gone, and the existing industrial applications of historical facts or anecdotes is feasible fully.
2) coal dust granulation activating process: with water glass (water glass) aqueous solution, dispersion agent, setting accelerator; add in the coal dust and stir; water glass has good cohesiveness; in tablets press, make coal dust agglomerating granular; setting accelerator (silicate cement commonly used; add-on be about water glass 10%～30%) impel water glass to be condensed into water-fast silicic acid gel rapidly, and make the coal dust granule possess water resisting property.Also can in coal dust, add Paniculate coal in the production and form a core.The water glass consumption is generally in 0.1%～1% of coal amount, thereby very little to the industrial production cost and the ash influence of product.Though the coal dust granule has certain intensity, unsuitable spreading in the operation operation.
About coal preparation technique, when needs carry out coal separation except that cash to Coarse Coal, adopt air-dense medium fluidized-bed coal picker 11, suitable granularity is d=6～50, the Coarse Coal granularity that the present invention produces is d=3～20, is mixed with the Bed for Fine Coal of a spot of d＜6.In case of necessity, can increase by the sieve apparatus of one d=6, with the control coal particle size at the feeding device of coal picker.
The said gas of the present invention divides tower referring to CN1235187A application for a patent for invention " Bed for Fine Coal and manufacturing method and apparatus thereof ".
As Fig. 2, tower body 23 is the uniform cross section column, and transversal face length * wide=L * B becomes rectangle, general L:B 〉=3; Tower height H should satisfy needing of tower inner member layout, and the empty cross section strength segregation section of the 2.5～3.5m that should have an appointment; The cat head wall offers coal inlet 24, connects with screw-type coal distributor 2 outlets as the magnitude the do not had speed governing of Fig. 1; The cat head wall has air outlet 25, connects powder storehouse 4 inlet (see figure 1)s with the pipeline of giving vent to anger; Top of tower is equipped with the hydrant sprinkler head 26 of temperature-sensitive control, connects outer water system.Inclination group sieve is housed in the tower from top to bottom, and the sieve number need be complied with into the tower coal particle size and be decided, and generally is no less than 2, to go into tower coal d＜x
4=50 is example, is provided with 3 roads sieve.The sieve seam aperture of top sieve 27 is e
On, x then
4＞e
On＞x
3, screen overflow drops down onto intermediate screening 28 from sieving end, seam aperture e
In=x
3For guaranteeing screening efficiency, intermediate screening 28 should have enough areas, can prolong sieve length to tower, guaranteeing under the moving condition of the automatic slide of screen overflow, can be made into polyline shaped, the tower of sieve 28 is outer partly should to have lamina tecti 29 and corresponding sealing side plate, makes taper receiving hopper 30 under the sieve, and the awl end is communicated with material falling hole 31 and Ta Nei; Sieve 28 ends and connect aggregate bin 32, outlet connects discharge tube 33, but pipe 33 connects with spiral discharging machine 34 charging openings of stepless speed regulation.Discharge tube and discharging machine should have suitable length, to form the stock column sealing gland, prevent that air from scurrying in the tower (tower is full negative pressure work) in a large number, but the air-flow that pours in down a chimney that small leak causes does not influence system works, and the peelable break flour that sticks on the lump coal, and help the coal separation operation.Discharging machine 34 is sent coal into coal picker 8 as Fig. 1; The sieve seam aperture e of end sieve 35
Down〉=x
2, apart from intermediate screening 28 about 1000mm, distance should be greater than 3x between the sieve end-to-end distance tower wall
3, and be positioned on the hole 31.
Gas is the air distribution plate 36 of tilting at the bottom of dividing the tower of tower 3, connects isobaric bellows 37 under the plate.Isobaric bellows 37 are divided into some five equilibriums along the length L direction, form sub-air chamber, and each sub-air chamber all is provided with inlet mouth 38 separately, connect admission line and controlling valve 39, again with the inlet manifold of the strength system (see figure 1) that links.Air distribution plate can adopt the porous plate sparger, and each locellus is provided with start discharging soon material hand hole 40 and corresponding measuring cell P, thermo detector t.
Width B direction tower wall at the imaginary metal line height h of fluidized layer 41 offers overflow port 42.Net formula baffle plate 43, mesh e=x are equipped with in the overflow port inboard
2, controlled baffle plate 44, the overflow hopper 45 of regulating overflow height, overflow tremie pipe 46 are equipped with in the overflow port outside.Under the metal line of activation solution steeping vat 9 (see figure 1)s of pipe 46 insertion devices, to form water seal.
Offer Coarse Coal on aspect the tower wall width of the low spot of air distribution plate 36 and unload grain pipe 67, but connect with the charging opening of the spiral discharging machine 47 of stepless speed regulation.The length sum of discharge tube and discharging machine should be greater than 2m, to form the stock column sealing gland.Unloading machine is with air-dense medium fluidized-bed coal picker 11 (see figure 1)s of coal feeder.
The transparent hagioscope 48 of tower wall should be observed overflow situation, and offers maintenance hand-hole 49.Fluidized layer and isobaric bellows and gas approach pipeline should have thermal insulation layer 50; Measuring cell P is equipped with in fluidized layer bottom and tower upper end, and thermo detector t is equipped with at the middle part.
Production regulation and control aspect, 1) the controlling valve 22 control x of regulation device (see figure 1)
1Value, the speed of regulation and control charging machine is with control output; Regulation and control gas temperature with control drying, the operation of heating;
2) rotating speed of adjustment overflow height or Coarse Coal discharging machine 47 is to control coal at the fluidized layer mean residence time, with regulation and control ridity and separation rate;
3) regulate and control the rotating speed of overflow height or discharging machine 47 respectively, to adjust the output ratio of Bed for Fine Coal and Coarse Coal;
4) aperture of more draping formula baffle plate 43, regulation and control x
2Value; Change the aperture of intermediate screening 28, regulation and control x
3Value.
The structure in powder storehouse is described as follows:
One of technical problem that the coal system of processing is the most thorny is the shop problem that solves dust pollution and dried fine breeze.It is dry and separate that the technical program is carried out coal dust bits with strength, and the break flour amount is very big, its workload that captures, stores, adorns, transports, unloads greatly, very hard to tackle.Be to guarantee coal system of processing serialization and adjustable operation, and in operation, solve dust pollution question, specialized designs fine coal capture the storehouse, collection separates, and captures, stores, is discharged to one, and it is placed the negative pressuren zone work (as Fig. 1) of system.
Powder chamber structure sketch such as Fig. 3～6, the powder storehouse is column, top straight section 51, bottom inverted cone segment 52, each section cross section the best is a rectangle.Straight section 51 is divided into symmetric left and right two Room with dividing plate 53, and left and right cell structure is identical, and each is divided into inlet plenum 55 and return-air chamber 56 with division plate 54 with it.Inlet plenum is equipped with convergent inlet pipe 57, inserts indoor about 500mm, exit velocity ω
1Desirable 20～30M/s; Return-air chamber roof is equipped with escape pipe 58, and the fabric filter 59 that is back taper and arranges is equipped with on top, and (heatproof＞120C), programme controlled deashing vibrator 60 is housed on the strainer leaves remittance gas-bearing formation 61 between strainer and roof, return-air chamber up section gas speed ω
2Should be less than 0.2M/s, but to guarantee the thick dirt free setting of d 〉=0.1mm.The apparent sweep gas speed of strainer woven membrane ω
3, recommendation is about 0.01M/s.Strainer should be made fabricated, changes, keeps in repair in order to filtering layer.The length h of division plate 54 generally should get h＞1600mm, and the distance of itself and dividing plate 53 lower ends is Δ h, should get Δ h＞1500mm.Hypomere 52 bottom surfaces, powder storehouse offer the more than one discharge port of arranging by arts demand 62, and connect the charging opening with spiral discharging machine 63, and coal dust is delivered to pressing section (as Fig. 1).Work by turns in left and right chamber, powder storehouse, when a chamber venting moved, another chamber then was in the deashing state of dying.So each chamber inlet, outlet all is equipped with air inlet T-valve 64, the T-valve 65 of giving vent to anger is as Fig. 3, shown in 6.Inlet, outlet T-valve and deashing vibrator 60 should be with programme controlled automatic executing agency controls.And on the strength systematic pipeline of packing into as Fig. 1.
As Fig. 3, inlet plenum is equipped with measuring cell P, and thermo detector t, wet bulb thermometer l are equipped with in the return-air chamber, and the gas-bearing formation that converges is equipped with measuring cell P, in order to supervise powder storehouse resistance drop and to prevent dew point.Suitably highly be provided with powder stock column height monitor K in awl section 52,, be provided with inspection manhole 66 at sidewall as Fig. 3.
Coal dust output when the effective capacity height in powder storehouse should guarantee that capacity satisfies system and produces more than 3 hours.
In poling processing technique, can adopt industry activator potassium, sodium salt class or oxide compound commonly used, for example Repone K, sodium-chlor, potassium permanganate, sodium permanganate, water-soluble metasilicate (water glass) etc., add-on is 0.1%～1.0%, industrial common employing industry NaCl.
Dispersion agent adopts existing standardized product, for example often adopts cement dispersants, and consumption adds in accordance with regulations.
Setting accelerator adopts silicate cement, and usage quantity is about 10%～30% of water glass consumption.
The adulterating agent of coal moulding of loosing comprises soft raw clay and binding agent, sulphur-fixing agent, dispersion agent.Binding agent is a cement, and the proportioning that soft raw clay and binding agent account for coal is respectively 1%～5%, 1%～5%, is preferably 2%～3%, 2%～3%.For the industrial fuel moulded coal, can use portland-type cement, for gasification briquette, should adopt aluminate class cement.Soft raw clay generally is processed into dried shape fine powder or makes mud and use.Sulphur-fixing agent adopts Ca (OH)
2Powder, as white lime, carbide slag etc., its consumption is decided according to the coal sulphur content, the CaO composition in the cement should be reduced during calculating.Gu it is the sulfur catalysis stablizer has multiple series, commonly used as Fe
2O
3And NaCl.Dispersion agent accounts for the proportioning of coal with 0.01%～0.05%, is preferably 0.02%～0.03%.The addition of cement hardener is 2%～4% of a cement, can adopt 3%, and realization cement is finished initial set in 2～5min, finish final set in 5～10min, and the available markets standardized product also can be selected CaCl for use
2, Na
2CO
3, water glass etc. is as the moulded coal cement hardener.Water is an amount of.
Binding agent also can be starch, and the proportioning that accounts for coal with soft raw clay is respectively 1%～5%, 1%～5%, preferably adopts 2%～3%, 2.5%～3.5%.Sulphur-fixing agent still adopts Ca (OH)
2Powder.Dispersion agent adopts 0.01%～0.05%, and the moulded coal fixed carbon that makes is basic identical with feed coal.But the superfine flour of starch select tape bran with the unit price of reduction adulterating agent, and stays than gross blow hole after the little coking of wheat bran, the abundant not pyrogenic detonation suppressor effect that then has concurrently.Soft raw clay select for use principle similar to Example 1, proportioning also can select 1%～4%.Dispersion agent is optional with cement water reducing agent standardized product or clay suspending agent, and as tripoly phosphate sodium STPP etc., proportioning adopts 0.02%～0.03%.
Claims (9)
1, produces the device of clean coal row product, form by the gentle flow path device of coal flow path device, it is characterized in that 1) the coal flow path device is provided with the raw coal coarse fraction and crusher, feeder, gas divide tower, powder storehouse, tablets press, mixing machine, shaper, coal picker, activating apparatus, stirring conveyor and pipeline thereof, the coal export of raw coal coarse fraction and crusher connects the feeder inlet, the feeder outlet connects the coal feeding hole that gas divides tower, gas divides the coal dust air outlet, top of tower to connect the powder storehouse, the discharge in powder storehouse connects tablets press and mixing machine respectively, and the outlet of mixing machine connects shaper; Gas divides the upper mass coal export of tower to connect coal picker, connects coal handling plant again and exports smart lump coal and spoil; Gas divides the makeup of taking over a job of the upflow tube of tower to put, and connects transfer roller output Bed for Fine Coal again; Gas divides the discharge tube of the air distribution plate lower-most point of tower to connect air-dense medium fluidized-bed coal picker, connects stirring conveyor output Coarse Coal again; 2) the air-flow range device is provided with roasting kiln, main air blower, gas blower, tail gas washing tower, settling tank, air valve and pipeline thereof, the feeding warehouse of roasting kiln connects the spoil outlet of air-dense medium fluidized-bed coal picker, the blast inlet of roasting kiln connects gas blower, and the exhanst gas outlet of roasting kiln connects gas through smoke valve and divides the tower inlet mouth; Main air blower exports one the tunnel and connects and connect gas again behind the circulation air valve and divide the tower inlet mouth, and another road connects tail gas washing tower after connecing exhaust gas valve again; The washing water of tail gas washing tower connect settling tank, and the outlet of the mud coal of settling tank connects mixing machine, main air blower import and connects pneumatic outlet after the filter that connects the powder storehouse behind the controlling valve again, and gas divides the coal dust air outlet of tower to connect powder storehouse inlet mouth; The outlet of pressure lock connects gas and divides the tower inlet mouth.
2, the device of production clean coal row product as claimed in claim 1, it is characterized in that said gas divides tower to be provided with tower body, tower body is the uniform cross section column, tower height has the empty cross section strength segregation section of 2.5～3.5m, the cat head wall is provided with coal inlet and air outlet, and top of tower is provided with the hydrant sprinkler head of temperature-sensitive control; At least 2 inclination group sieves are housed in the tower from top to bottom, and the end of intermediate screening connects aggregate bin, and outlet connects discharge tube, and discharge tube connects spiral discharging machine; Be the air distribution plate of tilting at the bottom of the tower, connect isobaric bellows under the air distribution plate, isobaric bellows are divided into five equilibrium along its length, form sub-air chamber, and each sub-air chamber all is provided with inlet mouth, external admission line and controlling valve separately; Width tower wall at the imaginary metal line height of fluidized layer offers overflow port, and net formula baffle plate is equipped with in the overflow port inboard, and controlled baffle plate, overflow hopper and the overflow tremie pipe of regulating overflow height is equipped with in the overflow port outside; Offer the Coarse Coal discharge tube on the tower body width of the low spot of air distribution plate, discharge tube connects discharging machine; Be provided with corresponding measuring cell, thermo detector, transparent hagioscope, inspection manhole at Ta Bishang; Fluidized layer and isobaric bellows and gas approach pipeline have thermal insulation layer in the tower.
3, the device of production clean coal row product as claimed in claim 1, it is characterized in that said powder storehouse is column, top is straight section, the bottom inverted cone segment, straight section is divided into symmetric left and right two Room with dividing plate, two cell structures are identical, each is divided into inlet plenum and return-air chamber with division plate, inlet plenum is provided with the convergent inlet pipe, return-air chamber roof sets out tracheae, and top is equipped with and is the fabric filter that back taper is arranged, programme controlled deashing vibrator is housed on the strainer, leave the remittance gas-bearing formation between strainer and roof, the air inlet/outlet of left and right sides air chamber is equipped with into and out of air valve.
4, the device of production clean coal row product as claimed in claim 1, the pressure roller that it is characterized in that said pair roller type coal sheet machine is got on the bus and is shaped on the rip cutting tooth, and embeds the crosscut tooth, and pressure roller crown gap is the igniting uneven fracture.
5, clean coal row product processes method is characterized in that:
1) raw coal is through coarse fraction and break process, coal particle size d＜x
4Mixed coal through the feeder branch tower sorting of supplying gas: the coal dust of (1) d＜x is sent into the powder storehouse; (2) d=x
3～x
4Lump coal obtain smart lump coal and spoil through coal picker, export by coal conveyor; (3) d=x
1～x
2Bed for Fine Coal export by transfer roller after sending the activating apparatus activation treatment; (4) d=x
2～x
3Coarse Coal send into air-dense medium fluidized-bed coal picker, sub-elect 1. smart Coarse Coal, export after the activated processing, or be mixed into the type mixed coal with the sheet moulded coal; 2. spoil send internal fired furnace or output;
2) Paniculate coal that adds the aqueous activator of viscosity, dispersion agent, setting accelerator by the coal dust of powder storehouse output and allocate into when needing forms the output of coal dust granule through granulation;
3) by the coal dust of powder storehouse output add adulterating agent and system recoveries the washing mud coal, through mix, moulding makes sheet coal or coal briquette.
6, clean coal row product dirt production art method as claimed in claim 5 is characterized in that said activation treatment for being activator with the salt of potassium, sodium or the aqueous solution of oxide compound, carries out osmotic treated to Bed for Fine Coal or Coarse Coal.
7, clean coal row product processes method as claimed in claim 6 is characterized in that activator is industrial NaCl, and its consumption is 0.1%～1.0% of a coal.
8, clean coal row product processes method as claimed in claim 5, it is characterized in that the aqueous activator of said viscosity is a sodium silicate aqueous solution, the consumption of water glass is 0.1%～1.0% of a coal, and setting accelerator adopts silicate cement, and consumption is 10%～30% of a water glass.
9, clean coal row product processes method as claimed in claim 5 is characterized in that said adulterating agent comprises soft raw clay and binding agent, sulphur-fixing agent, dispersion agent, and binding agent is a cement, and proportioning is 1%～5%, and sulphur-fixing agent is Ca (OH)
2Powder, the proportioning of dispersion agent are 0.01%～0.05%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00101796 CN1100125C (en) | 2000-02-03 | 2000-02-03 | Equipment and process for producing clean coal series |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00101796 CN1100125C (en) | 2000-02-03 | 2000-02-03 | Equipment and process for producing clean coal series |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1263933A CN1263933A (en) | 2000-08-23 |
| CN1100125C true CN1100125C (en) | 2003-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00101796 Expired - Fee Related CN1100125C (en) | 2000-02-03 | 2000-02-03 | Equipment and process for producing clean coal series |
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|---|---|
| CN (1) | CN1100125C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102492520B (en) * | 2011-12-07 | 2014-08-06 | 王变成 | Energy-saving ecological energy fuel |
| CN102851092B (en) * | 2012-10-15 | 2014-01-08 | 永兴祥光环保燃料有限公司 | Novel environment-friendly energy-saving coal and preparation method thereof |
| CN107726306A (en) * | 2017-11-01 | 2018-02-23 | 山西大学 | A kind of clean coal clean combustion multi-production process system |
| CN108728198A (en) * | 2018-05-03 | 2018-11-02 | 潍坊市鑫港物流有限公司 | A kind of production method of cleaning lump coal |
| CN109797022A (en) * | 2019-03-05 | 2019-05-24 | 西北师范大学 | A kind of preparation of clay-calcium based sulphur-fixation reagent and application in fixed cow dung/sulphur coal composite briquette |
| CN117513095B (en) * | 2024-01-08 | 2024-03-08 | 廊坊市际通路政工程有限公司 | Processing technology of recycled asphalt concrete |
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