CN108679963A - A kind of coal using flue gas dries dedusting and feed system - Google Patents

A kind of coal using flue gas dries dedusting and feed system Download PDF

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Publication number
CN108679963A
CN108679963A CN201810901305.8A CN201810901305A CN108679963A CN 108679963 A CN108679963 A CN 108679963A CN 201810901305 A CN201810901305 A CN 201810901305A CN 108679963 A CN108679963 A CN 108679963A
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China
Prior art keywords
feed
coal
roller
drying
feed system
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CN201810901305.8A
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Inventor
马倩
潘建波
薛安克
吕彬峰
杨兰花
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Zhejiang Tianlu Environmental Technology Co Ltd
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Zhejiang Tianlu Environmental Technology Co Ltd
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Priority to CN201810901305.8A priority Critical patent/CN108679963A/en
Publication of CN108679963A publication Critical patent/CN108679963A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/02Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
    • F26B11/04Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001Handling, e.g. loading or unloading arrangements
    • F26B25/003Handling, e.g. loading or unloading arrangements for articles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/005Treatment of dryer exhaust gases
    • F26B25/007Dust filtering; Exhaust dust filters

Abstract

The invention discloses a kind of coals using flue gas to dry dedusting and feed system, including transmission stocking system, drying system, dusting and desulfuring system and sealing feed system, the drying system includes the roller with driving device, feeding seal case, outlet end setting discharging seal box is arranged in the input end of the roller;The roller is at least level-one;The dusting and desulfuring system includes sequentially connected deduster, air-introduced machine and desulfurizer, and the deduster is connected to the hot-blast outlet end of the drying system;The sealing feed system includes the second holding vessel, second holding vessel is sequentially connected the second screw, feed barrel and reaction kettle, ash handling equipment is set on the feed barrel, 3/4 of the helical blade cross section in the feed barrel no more than cross section in cylinder.

Description

A kind of coal using flue gas dries dedusting and feed system
Technical field
The present invention relates to coal substance cleaning pretreatment, comprehensive utilization, energy-conserving and emission-cutting technology fields, more particularly, to a kind of profit Dedusting and feed system are dried with the coal of flue gas.
Background technology
China be one " more coals, few oil, lean gas " country, in the explored fossil energy reserves in China, oil and Natural gas only accounts for 6%, remaining 94% is coal substance.Such resource characteristic determines that China will build energy based on coal substance Source structure.
Coal in China uses and reserves are in the majority with low-order coal, the main air total emission volumn coal such as sulfur dioxide and nitrogen oxides Contribution accounts for 2/3rds or more, and coal clean and effective is utilized and has become national strategy and inevitable choice.Clean and effective utilizes main two A direction, first, end treatment, minimum discharge after coal combustion, second is that source clean utilization.Original will be done again after coal cleaning pretreatment Material or high-grade fuel, change tradition utilize path, from economical and environmentally friendly angle can substantially change it is existing utilize pattern.
Coal material composition includes organic matter (hydrocarbon oxygen nitrogen sulphur etc.), inanimate matter (moisture and minerals) two major classes.Wherein, have Heat caused by the burning of machine matter is its energy value place, and moisture absorbs heat in coal substance combustion and becomes vapor, not only The calorific value of coal substance and market value are influenced, the hiding security risk that furnace pressure is unstable is more brought.
So the removal of moisture has the meaning that can not be despised for the comprehensive utilization of coal substance.Separate unit coal substance at present Drying equipment it is more, but integrated system equipment is less.Publication No. discloses a kind of clean for the patent of invention of CN107504789A Net drying device for molded coal, including drying oven, drying oven top are equipped with feed inlet, and bottom is equipped with discharge port, and drying oven passes through hot wind Pipeline connects pressure fan, and heat dissipation ajutage is equipped in drying oven, and heat dissipation ajutage helically rises shape, heat dissipation ajutage connection heat Wind pipeline, radiate ajutage on be provided with several ventilation holes;Umbrella material separating disc is equipped in feed inlet on drying oven;Drying oven passes through Cleaning shaft connects suction ventilator, and suction ventilator air outlet connects retracting device.The above vertical drying unit produces on one side, connects on one side It can not ensure that coal sub-material is uniform, Medium Exchange is abundant, moisture evaporation is thorough, the coal substance by drying while continuous discharging Water content tends not to reach expected standard.And the vertical preposition Transmission system gradient of drying unit is larger, equipment energy consumption is higher.
Publication No. is that CN101985558 discloses a kind of resolving device of coal substance, including one carries feed inlet and goes out The closed kiln body of material mouth, the kiln body is interior to be arranged flame feed channel heating mechanism, the flame feed channel heating mechanism and kiln body inner wall Between the coal substance that is formed promote decomposition channels, the coal decomposition gas that setting is connected to coal substance propulsion decomposition channels in the kiln body Collecting pipe.The equipment can resolve into powder coal combustion gas, tar gas and the higher coal of calorific value, but treating capacity is small, it is difficult to industrialize Using.
Meanwhile powder coal upgrading energy one side continuous production, high-temperature dust is efficiently removed on one side, and continuous mass production integrates Equipment is domestic almost without some is also the dust processing that stop production two weeks.
Invention content
To solve the deficiencies in the prior art, the present invention provides it is a kind of it is simple in structure, drying efficiency is high, dedusting is de- Sulphur meets environmental requirement, while energy continuous feed, Efficient high-temperature dedusting continuous gas generation, and the big production of continuous industryization utilizes flue gas The coal drying dedusting of heating and feed system.Low temperature, anaerobic, do not have to outer water in the case of, will be in coal by cleaning pretreatment Oil, natural gas and the water of high value are separated, and high card anthracite is obtained, also can be by the further deep processing of anthracite, can Obtain the coal base new material of high added value.
Specific technical solution of the present invention is as follows:Including transmission stocking system, drying system, dusting and desulfuring system With sealing feed system,
The transmission stocking system includes the second conveyer for conveying raw coal, second conveyer connection the The outlet end of one holding vessel, the first holding vessel connects second conveyer, and the second conveyer connects drying system;
The drying system includes the roller with driving device, and feeding seal case is arranged in the input end of the roller, Outlet end setting discharging seal box;The roller is at least level-one;
The dusting and desulfuring system includes sequentially connected deduster, air-introduced machine and desulfurizer, the deduster It is connected to the hot-blast outlet end of the drying system;
The sealing feed system includes the second holding vessel, and the second holding vessel is sequentially connected the second screw, charging Ash handling equipment is arranged on the feed barrel in cylinder and reaction kettle, and the helical blade cross section in the feed barrel is not More than 3/4 of cross section in cylinder.
The transmission device includes helical feed, scraper plate conveying, bucket elevator, roller conveying etc..
The adjacent intermediate channel of drag conveyor it is horizontal, in vertical plane can limited warpage cry flexible scraper plate conveying Machine.Its middle fuselage is in working face and haulage drift intersection in the working face conveyor of 90 degree of bending settings " turning scraper plate is defeated Send machine ".In current coal working face, the effect of drag conveyor is not only to transport coal and material, but also is coalcutter Running track, therefore it becomes indispensable capital equipment in modernization coal winning technology.Drag conveyor can keep continuously transporting Turn, production can be normally carried out.Otherwise, entire coal working face just will present end-of-life state, make entire production disruption.Scraper plate is defeated Send machine scraper plate chain haulage, the transferring bulk cargo in slot.Drag conveyor can be used for horizontal transport, also can be used for tilting transport.Tool Have sturdy construction, it is simple in structure, in delivered length can arbitrary point charging or discharging, casing is closed, can prevent conveying material When dust from flying and the advantages that pollute environment.
Screw conveyor is commonly called as auger, is suitable for the horizontal feed of particle or granular material, tilts conveying, vertical transport etc. Form.Fed distance is different according to lopsided different, generally from 2 meters to 70 meter, is shifted for the material between adjacent two roller, Screw conveyor includes shaftless screw and has axis spiral, can be configured as multiple coil propeller;Select which kind of conveyer specific Depending on the aesthetics of visual material conveying capacity, material component, gradient and drying unit.
Preferably, drag conveyor can be selected in second conveyer, second conveyer, third transmission device.
Preferably, the first screw, which can be selected, axis spiral.
The main function of first holding vessel is storage material, plays the role of one and stores, buffering, including rectangular Body and cylindrical structure.Cylindrical structure, bottom is generally used to use inverted conical structure.It can be stored up in this way with minimum material Deposit maximum material.The size of holding vessel and the quantity of tank body are determined according to actual treatment ability and demand.
Preferably, cylindrical structure can be used in the first holding vessel.
Roller is set to single-stage or multilevel device according to production requirement, the optional series connection of sequence, parallel-connection structure, can also connect and Mixing in parallel is determined with specific reference to production requirement and site layout project.To ensure powder coal from feed inlet inlet port not by high pressure Hot wind adverse current blowback goes out, and can use spiral propeller feeding.Drying materials can divide indirect drying and directly drying, direct hot wind and powder Beans contact is that drying efficiency is highest.A hot wind inlet and hot-blast outlet is respectively set at roller both ends, is used for transmission heat Wind realizes the drying drying to powder coal.
Preferably, this drying system selects direct hot wind to contact drying with powder coal.
To ensure the leakproofness at roller both ends and hot wind inlet and hot-blast outlet, feeding seal is respectively set at roller both ends Case and discharging seal box, and discharging seal box and feeding seal case are connect with roller by dynamic and static sealing device respectively, are prevented out The phenomenon that material seal box and the junction of feeding seal case and roller are leaked out, if any air leakage phenomena, is also easy to stacking material, Accumulation of heat, it is easy to which spontaneous combustion causes the safety accidents such as fire.Hot wind inlet is arranged in the side of feeding seal case or positive front, hot wind Outlet is arranged at the top or side of discharging seal box.Feeding seal case and discharging seal box setting ensure that hot wind inlet and Between hot-blast outlet and roller independently of each other, mutually non-interference;Meanwhile the setting of feeding seal case and discharging seal box is to input Hot wind play certain cushioning effect, ensure hot gas uniformly through drum cavity.
The feeding seal luggage contains feed inlet and hot wind inlet, and the feed inlet is on the top of feeding seal case Or side surface upper part;The discharging seal box includes discharge port and hot-blast outlet, and the discharge port is in discharging seal box Bottom end or side lower.
Discharge outlet is equipped with the guide plate of two pieces of arrangements in a certain angle in discharging seal box, which is conducive to roller Interior material enters in third conveying device;Feeding seal case and discharging seal box seal with roller coordinate respectively, powder coal warp The entrance of feeding seal case enters in roller, and roller then is discharged from the outlet of discharging seal box bottom.
First screw is connected with feed inlet sealing, and the first screw also acts as other than mechanical feed Sealing function prevents in roller, has the hot wind of certain pressure to scurry out from there, preferably there is axis spiral, and favorable sealing property.
The inner wall of rotary drum is equipped with L-type lifting blade, and the L-type lifting blade is along inner wall of rotary drum around distribution.Lifting blade Ensure that material is heated evenly, improves the drying efficiency and separative efficiency of whole device;The number of lifting blade setting can be according to reality It needs to be determined that.It is arranged in the lifting blade of inner wall of rotary drum, ensures that powder coal when by roller, constantly rolls, material is heated evenly, Accelerate drying rate, reduces the caking of powder coal.
The roller can horizontally disposed also tiltable arrangement, when horizontally disposed, single unit system is beautiful and generous, neat whole It is clean and small to driving mechanism and limiting device friction coefficient, it is conducive to improve the Production Life of the conveying devices such as roller, it is horizontally disposed Other than the driving force brought of advancing forward by hot wind, drive material to moving ahead mainly by the L types lifting blade in roller Into mainly being realized with certain slanted angle by L-type lifting blade, L-type lifting blade is in addition to that can drive material Outside stirring, material can also be driven slowly to move ahead.The speed that material is advanced forward is also raised with L-type other than the rotating speed by roller There are much relations at the angle of inclination of flitch, is specifically determined with the processing capacity of powder coal upgrading drying system.
When the drum-inclined is arranged, mounting height is identical, and one end that roller is equipped with discharge port is in low level.Roller Inside/outside diameter size and length can be determined according to the actual treatment ability of practical powder coal upgrading system.Roller is arranged with horizontal plane At certain gradient, ensure that the height of drum front end is higher than the height of roller rear end, the materials such as powder coal are in its own gravity and heat It is transmitted automatically under wind action, ensure that the continuous and automatic operation of whole device, reduce energy consumption.
The driving device of above-mentioned roller includes drum peripheral face ring gear, the support roller engaged with the ring gear and for driving Motor.
Preferably, to prevent roller from gliding, limiting device can be set at support roller.The limiting device of the present invention is optional Projection is selected in the ring-shaped step at support roller both ends, in the setting of support roller peripheral surface to be arranged with the matched limiting slot of outer shroud, at outer shroud The forms such as groove, the limit protrusion coordinated with groove in the setting of support roller peripheral surface.
The roller includes multistage, is sequentially connected in series, is mixed mutually with parallel connection in parallel or series.Cloth is set or tilted for plain cloth It sets.
Second screw is shaftless screw or has axis helical structure.
Material between the roller is conveyed by third transmission device.
It is separately installed with access hole on the discharging seal box and feeding seal case;Heat preservation is installed outside the roller Layer.
The feed barrel is connected by metal compensator with dynamic and static sealing device with reaction kettle.
It is separately installed with the second valve and third valve at the second holding vessel inlet port and outlet port;It is described into The 4th valve is installed at barrel body feed inlet.
To ensure the drying effect of powder coal, the present invention sets up multi-stage drying device, level-one drying unit effect compared with In the case of difference, two level drying unit is set up, principle is as level-one drying unit.If the effect of two level drying unit is still The requirement that follow-up coal high temperature utilizes system is not achieved, moisture content is higher, can set up three-level drying unit.And multi-stage drying device it Between independently of each other, can isolated operation, specific visual powder coal moisture content, weather temperature, humidity, depending on four seasons weather.
The deduster includes the patterns such as sack cleaner and electric precipitator.In each place setting dust suction for emitting ash Dusty gas, is transported in dust-extraction unit by cover by pipeline gas circuit, after carrying out gas solid separation wherein, by dust collection in this In dust-extraction unit, and clean gas is introduced into manifold or is directly discharged into the complete equipment of air, is dust pelletizing system, and dedusting Device is the important set part in the system.From the point of view of dust removal by ventilation, dust is to the long period and is deposited in floating state All solid granules being in air, are a kind of dispersions, are called aerosol, and wherein air is decentralized medium, solid Particle is dispersed phase.Deduster is exactly the equipment that this solid granule is separated from aerosol.
The operation principle of deduster is as follows:Dusty gas enters filter chamber by lower open formula flange, direct compared with coarse granule Ash cellar is fallen into, for dusty gas through sock filtration, dust is detained to a bag table, and net gas is discharged into air through sack to air-purifying chamber, by wind turbine. When the dust on filter bag surface is continuously increased, program control instrument is started to work, one by one unbalanced pulse valve, and compressed air is made to pass through spout to filter Bag carries out jetting deashing, and filter bag is made to expand suddenly, and under the action of back draught, the dust of imparting bag table is detached from rapidly filter bag and falls Enter ash cellar, dust is discharged by unloading valve.Deduster mainly by upper box, middle case, ash bucket, air inlet equalizer flow tube, holder filter bag and The compositions such as blowing device, ash-discharging device.The application of sack cleaner has over one hundred year history, its biggest advantage is that dedusting is imitated Rate is high, and up to 99.99% or more, concentration of emission can reach 10mg/m3Hereinafter, and classification efficiency it is also very high, it is below to 2.5 μm Fine particle also has good arresting efficiency, therefore is widely used.
Preferably, sack cleaner can be selected in the deduster of the present invention.
The air-introduced machine is to generate negative pressure by wheel rotation, and then a kind of equipment of air is extracted from system, generally Mounted on the tail end of system, for the heat smoke in extracting device.The present invention is mounted on the rear end of deduster, the heat in roller Gas in flue gas and deduster drives by air inducing machine negative pressure.
Preferably, commercially available conventional air-introduced machine can be selected in air-introduced machine, meet production capacity.
The desulfurizer should be small-sized desulfation dust-extraction device, mostly referred to as desulfurizing dust-collector.It is removed in desulfurizing tower and desulfurization In dirt device, SO should be contained2Flue gas, to the SO in flue gas2Carry out chemical absorbing.SO2Absorption cleaning process, processing is low concentration SO2Flue gas, exhaust gas volumn are considerable, it is desirable that continuously high-efficient purification flue gas in moment.Thus, SO2The chemical reaction of participation The reaction that is exceedingly fast is should be, transformation system numerical value is larger in their film, and reaction occurs in film, therefore it is continuous phase, rapids to select gas phase The absorption tower that flow degree is high, boundary is larger is proper as desulfurizing tower and desulfurizing dust-collector.In general, spray column, packed tower, Spray tower, plate column, venturi absorption tower etc. can meet these requirements.Wherein, spray column is the most widely used desulfurizing tower One of type, spray column have it is simple in structure, the reliable advantage of technical maturity is widely used in large power plant, middle-size and small-size low-sulfur Smoke gas treatment;For high-sulfur smoke gas treatment, coloured industry is based on Pneumatic emulsifying desulfurizing tower, Multi-layer sprinkling tower etc..
Preferably, the pattern of spray desulfurization can be selected in desulfurizer.
The powder coal that second screw is mainly used in holding vessel is delivered to rear end, need to seal conveying, including Shaftless screw and there is axis spiral.
The length of the appropriate extension certain distance in helical feed end, extension distance can be according to the second holding vessel size and material Depending on the actual effects such as yield.Parallel conveying or certain angle of inclination conveying, inclination angle can be used in bottom discharge helical feed Degree conveying can make material be more easy to concentrate on a point, and the dead angle of generation is only in conveying end, as long as Field Force periodically opens end End blind plate cleaning can solve the impurity such as the fine coal grain of blocking or dead angle accumulation.
It is because shaftless screw center is a concentric circles preferably, shaftless screw can be selected;Two carry out shaftless screw Use, under unit area, under certain flow rate, in the case where temperature is not high, than there is the material of axis helical feed more, to Save the material of round tube.
The valve is mainly used to be turned on or off the conveying of powder coal, including ball valve, gate valve and butterfly valve etc..Ball valve it With the action being rotated by 90 °, faucet body is sphere, has circular through hole or channel to pass through its axis.Ball valve is mainly used in pipeline Make the flow direction for cutting off, distributing and changing medium, it is only needed with the rotating torque of the operation and very little being rotated by 90 ° just It can close tight.Ball valve optimum switchs, stop valve uses.The flashboard of gate valve is for linear motion with valve rod, cries and rises Drop lever brake valve is also Outside screw stem rising through handwheel type gate valve.Usually there is trapezoidal thread on elevating lever, by the nut and valve body of valve tip Rotary motion is become moving along a straight line by guide groove, that is, becomes operation torque to operate thrust.Butterfly valve opening and closing element is a disk The butterfly plate of shape rotates in valve body around the axis of its own, to reach the valve of keying or adjusting butterfly valve.Which kind of valve selected Door can need to determine according to scene and production.
Preferably, highly practical, at low cost ball valve, third valve and can be selected in the first valve and the second valve Pneumatic gate valve can be selected in four valves.
The front end of the feed barrel is connected with the second holding vessel and the second screw, and use respectively third valve and 4th valve connects, and there are two types of effects for the valve, first, being turned on and off material;Second is that lock gas, prevents the high temperature in reaction kettle Gas is sailed against the current under pressure.
The middle part of the feed barrel is connected to the bottom of an ash handling equipment, and the end of the feed barrel is mended by metal Device, dynamic and static sealing device and reaction kettle is repaid to connect.
The quantity and size of second reservoir can be determined according to the day output of reaction kettle, it is therefore an objective to for feed barrel into Material is laid in and is buffered, and when the second screw starts, third valve automatically turns on, and the material of the second reservoir has one The pressure for being compacted highly block reaction gas reactor of fixed height, mainly material prevents from leaking, while the second storage Device, which cannot thoroughly, does not expect, not so the high-temperature oil gas in reaction kettle is gone out by the third valve adverse current of unlatching, so the second storage Device is generally fitted with material level alarm, when less than certain value, automatic alarm, and auto feed.
Shaftless spiral blade is installed, it is transversal that the cross section of blade is not greater than cylinder internal diameter inside the feed barrel The 3/4 of face, the exactly important innovations point of the present invention, is drawn on the basis of many experiments one relatively rational straight herein Diameter, feed barrel internal pipeline are the outlet gas flow path of high-temperature oil gas and the feed path of powder coal, therefore, internal heat The number of exchange degree, also determines the loss of reaction kettle energy.It is general 5~20 meters desirable, while can be used on the outside of feed barrel Heat-preservation cotton is kept the temperature, so that powder coal and the sufficient heat exchange of high-temperature oil gas.
Conveyor screw can be used shaftless screw and have axis spiral, it is proposed that use shaftless screw, because spiral is shaftless, material is not It easily blocks, discharge gate does not block, thus can be operated compared with low velocity, steady to be driven, and reduces energy consumption;Conveying capacity is that same diameter passes System has 1.5 times of screw conveyor shaft;Not only can lower section discharging, but also can end discharging;Using special liner plate, which can be at high temperature Work.
Preferably, the shaftless screw of feed barrel has certain length, and it is 10~15 meters desirable, it is too short to be unfavorable for heat It exchanges and sealing, too long conveying at high temperature is easily deformed, or even the problems such as fracture.
Internal diameter, thickness and the length scale of feed barrel can be determined according to the treating capacity of real reaction kettle;It actually used Cheng Zhong, shaftless screw are connected with driving motor.
The present invention using the outlet gap between the top and feed barrel inner wall of conveyor screw, in reaction kettle high-temperature oil gas from Feed end is discharged, and the advantage is that the temperature of powder coal after capable of controlling the upgrading of reaction kettle rear end, reaches needed for product, reduces reaction Temperature in kettle realizes continuous mass production, without stopping kettle operation.
The ash handling equipment main function is the high-temperature oil gas containing dust that comes out of reaction kettle under device effect, grey Dirt is blocked or is captured, and high-temperature oil gas is by entering next refrigerated separation equipment.Ash handling equipment includes gravitational dust collection, inertial dust collection, Cyclone dust removal, electric precipitation etc.
Cyclone dust collectors mechanism is that dust-contained airflow is made to rotate, and is detached grit simultaneously from air-flow by means of centrifugal force It is trapped in wall, then so that grit is fallen into ash bucket by gravity.The all parts of cyclone dust collectors all have the dimensions ratio Example, the variation of each proportionate relationship can influence the efficiency and the pressure loss of cyclone dust collectors, wherein deduster diameter, into Gas port size, air slit diameter are major influence factors.When in use it should be noted that when more than a certain boundary, favorable factor Unfavorable factor can be converted into.In addition, some factors are advantageous for improving efficiency of dust collection, but the pressure loss can be increased, thus it is right The adjustment of each factor must take into account.But the greatest problem of cyclone dust removal is to must assure that the stabilization of air quantity, and high temperature oil gas bag Containing water vapor, pitch, hydrophily and sticky dust, complicated component, be adhered to it is not easily to fall off on wall, except the non-timed is blown with oil gas It sweeps, is not so very suitable.
Electrostatic precipitation is one kind of dedusting method.Dusty gas by being electrically isolated when high-voltage electrostatic field, grit with In anion junction belt after negative electricity, tends to anode surface electric discharge and deposit.Electrostatic precipitator pattern can roughly be divided into following several Class:Be divided by airflow direction vertical and horizontal, be divided into board-like and tubular type by receiving electrode polar form formula, by precipitation pole plate dust it is clear Except method is divided into dry type wet type etc..Advantage is purification efficiency height, and drag losses are small, allows operation temperature high, processing gas range Amount is big, can fully achieve operation and automatically control.The disadvantage is that equipment is more complicated, it is desirable that pipe is allocated and transported and installed and safeguarded to equipment Reason is horizontal high.Dust specific resistance there are certain requirements, so there is certain selectivity to dust, all dust obtaining all cannot be made Obtain very high purification efficiency.Be affected by the operating condition of gas temperature, temperature etc., be both a kind of dust such as different temperatures, It being operated under humidity, the effect of gained is different, and some dust using effect under some temperature, humidity is fine, and at another Since the variation of dust resistance can hardly use electric precipitator under temperature, humidity.
Gravitational dust collection keeps airborne dust natural from gas by the gravity of itself using the dust principle different from the proportion of gas The cleaning equipment to settle down.It is it is a kind of it is simple in structure, that volume is big, resistance is small, easy care, efficiency are low is more original net Change equipment, is only used for slightly purifying.
Inertial dust separator is also inertial dust separator.Its principle is that inertia force is not during exercise using dust and gas Together, dust is separated from gas.Some form of barrier typically is set in the front of dust-contained airflow, makes air-flow Direction drastically change.At this time dust due to inertia force it is more much bigger than gas, grit is just detached from air-flow and is separated, and obtains The gas of purification is discharged after reef it in.This deduster is simple in structure, and resistance is smaller, the relatively low (40- of purification efficiency 80%), it is chiefly used in first segment when multistage purification, concentrator in purification or is used cooperatively with other cleaning equipments.
The present invention ash handling equipment on the basis of several usual means, be also equipped with inside ash handling equipment it is heat safe, The hydrophobic high molecular material of oleophobic, such material can make dust high-temperature oil gas when being rebuffed with ash handling equipment, and dust slowly gathers When to a certain extent, under the effect of the factors such as the wind-force in its own gravity or the external world, bottom can be freely fallen into, it will not be viscous with device Together, to make device lose dusting function, while high-pressure oil gun being installed in high molecular material many places inside ash handling equipment, from Dynamic purging, will not make dust wrap high molecular material and make its inactivation, the invention of this technology considerably increases high temperature oil The difficulty of gas dust, the dust feed barrel fallen into is interior to be again introduced into reaction kettle reaction by helical feed.
Preferably, the feed barrel is equipped with metal compensator with reaction kettle junction, top is installed respectively There are remote control and the temperature sensor and pressure sensor of field monitoring.
Metal compensator is as a kind of flexible pressure-resistant pipe fitting, using effective dilatation of its operative body bellows, with Change in size or compensation pipes that absorption line, conduit, container etc. are generated by the reasons such as expanding with heat and contract with cold, conduit, container etc. The effects that axial, transverse direction and angular displacement absorb vibrational energy, can play vibration damping, noise reduction has flexible, light weight, resistance to The multinomial features such as the antifatigue, high-low temperature resistant of burn into.
The dynamic and static sealing device is mainly by gland component, enhancing soft graphite disk, sealed outer ring component and sealing The compositions such as baffle ring component.
Gland component is welded by flange, seamless steel pipe, pressure ring group.The gas generated during the work time due to pyrolysis furnace Body does not have corrosivity, and the temperature of gas is at 200~400 DEG C or so.So pressure ring assembly uses common carbon structural steel just Technological requirement can be met, the length of sealed outer ring is goed deep by adjusting gland to realize the adjusting elastic to graphite packing_seal.
Tensile strength that enhancing flexible graphite stuffing not only overcomes pure graphite material is low, flexible soft resilience is poor, gas The disadvantages such as close property is low;But also there is good heatproof, anti-oxidant, corrosion resistance and preferable compression performance.Also stone simultaneously The good characteristic of ink;Therefore pyrolysis furnace and sealing element important in spiral sealing device structure are done with it;Also with its axial direction Retractility, radial lubricity and its comprehensive performance;
Preferably, the number of turns wound in this structure is enclosed for 8-12.
Sealed outer ring component is by flange, takes over and welded with pressure ring group, and sealing inner shield ring is welded by steel pipe and annulus It connects;Graphite packing is wrapped among the two, and by friction sealed between three, common cooperation is played radial and axial Sealing function.
The reaction kettle is Rotatable mechanism, and the material in reaction kettle can be made to be heated evenly;Reaction kettle is externally provided with heater box, And equipped with the heat conducting pipe through the reaction kettle, which is connected to the heater box;The vertical reaction kettle axis of the heat conducting pipe Line is arranged, and adjacent two heat conducting pipes vertical interlaced.
It is equipped with inclination arrangement in the reaction kettle and helically the deflector of structure, deflector are divided into water conservancy diversion steel plate and water conservancy diversion Single coil configuration or double-spiral structure can be used in stainless steel plate, also can single, double combination spiral stream guidance structure;It is revolved in reaction kettle During turning, the deflector of inclination arrangement has guide functions to the material in reaction kettle, and the material in reaction kettle is in water conservancy diversion It is moved to discharge port under the action of plate, accelerates the discharge of material in reactor.
Reaction kettle in the present embodiment is progressive circulating continuous production reaction unit, built-in 6~15 wireless temperatures Controller, the temperature for monitoring section, when equipment discharge port temperature does not also reach assigned temperature (500 DEG C~800 DEG C), tool The temperature of body is determined that temperature sensor sends computer and alarm device to by signal conveying, reminds work by different products Personnel, this is to illustrate that product does not reach Eligibility requirements also, is at this time taken measures main as follows, and reaction kettle can invert, and make fast Material to outlet is again introduced into reaction kettle and fully reacts, and extends the residence time, while continuing to heat, reaction kettle reversing time is 30min-120min etc., then reaction kettle rotating forward sees whether temperature sensor alarms when material enters discharge port, if report Alert, reaction kettle inverts again, so repeats, and ensures that product qualification is offline.If temperature sensor displays temperature is up to standard, fine coal enters Discharge port, into next program.
It is convenient for maintenance, access hole, the number of access hole, ruler can be respectively equipped in feeding seal case and discharging seal box It is very little, depending on specific location visual device device and site space;The quantity of access hole be 1~5, internal diameter DN300~800 it Between.When device breaks down, site operation personnel can repair the component in device by manhole, after the completion of repair Maintenance door is closed, the position of manhole setting can be determined according to practical matter.
Preferably, the number of each turnaround of unit mouth is 1~3, internal diameter is between DN400~DN500.
To prevent manual work from scalding, and adequately Btu utilization and heat exchange, it can be in feeding seal case, discharge sealing It can be kept the temperature with heat-preservation cotton on the outside of case and roller, the thickness and heat insulation effect of heat-preservation cotton depend on temperature inside device and device It is required that.
Preferably, the thickness of insulating layer is 100mm~200mm.
Beneficial effects of the present invention are embodied in:
(1) feed barrel of the invention and ash handling equipment can continuous feed, automatic ash-removing makes full use of the conservation of energy fixed Rule, improves the utilization rate of heat exchange, overall reduction temperature of reaction kettle, to which the consumption of the energy be greatly saved.
(2) present invention is by the second holding vessel, the second screw, and the simple connection of valve solves and connects in decades Continuous charging can not automatic gas-locking the problem of, by the automatic sensing of the second holding vessel material position inductor, the unlatching of Pneumatic gate valve or It closes, the material conveying of helix transporting device, hermetically sealed connection is easy to operate, is not necessarily to large complicated equipment, is plant personnel Greatly reduce security risk.
(3) present invention uses roller single-stage or multistage, serial or parallel connection or even series and parallel to be used in mixed way, with specific reference to Depending on Field Site Production Capability and site layout project, such drying system greatly improves the drying effect of powder coal, drops significantly The low energy consumption of subsequent reactions kettles, because liquid water becomes the raising of thousands of times of high-temperature vapor volume, the reduction of moisture greatly carries The high unit production capacity of follow-up cooling equipment.
(4) outfit of the conventional equipments such as deduster of the invention and desulfurizer so that the sulfur content of waste heat flue gas, dust-laden Amount all meets national qualified discharge very much, while improving energy utilization rate, meets the development of coal clean utilization.
Description of the drawings
Fig. 1 is the structural schematic diagram that a kind of coal using flue gas of the present invention dries dedusting and feed system.
Fig. 2 be Fig. 1 in A-A to sectional view.
Fig. 3 is the structural schematic diagram that stocking system is transmitted in the present invention.
Specific implementation mode
The coal using flue gas a kind of to the present invention dries dedusting below in conjunction with the accompanying drawings and feed system work is further detailed Thin description.
As shown in Figure 1-Figure 3, a kind of coal using flue gas dries dedusting and feed system, mainly there is conveying storage system System 1:Including the first conveying device 2, the first holding vessel 3 of the first valve 4, the second conveying device 5 and the first screw are carried 6;Drying system 10:Include the roller 11 with driving device 14, the charging being connected with static and dynamic sealing before and after the roller 11 is close Joint sealing 18 and discharging seal box 19;Dusting and desulfuring system 20:Including sequentially connected deduster 21, air-introduced machine 22 and desulfurization dress Set 23;Seal feed system 30:Including the second holding vessel 31, the second screw 32, feed barrel 33, ash handling equipment 34 and anti- Answer kettle 37.
Feeding seal case 18 includes feed inlet 12 and hot wind inlet 13, and the feed inlet 2 is in feeding seal case 18 Top or side surface upper part;The discharging seal box 19 includes discharge port 15 and hot-blast outlet 16, and the discharge port 5 exists The bottom end of discharging seal box 15 or side lower.
11 inner wall of roller is equipped with L-type lifting blade 17.It is advanced forward mainly by the L-type lifting blade 17 in roller 11 to drive, L Type lifting blade 17 has certain inclination arrangement, other than it can drive the stirring of material, can also drive material slowly forward It advances.
Multiple rollers 11 include being sequentially connected in series or in parallel, and roller 11 more than three-level can also connect and in parallel mixed mutually With single-stage or multiple rollers 11 include horizontally disposed and are in tilted layout;It is specifically wet by the production capacity of powder coal, local weather The factors such as degree, aridity, the arrangement at scene determine.
The selection of bag filter 21 substantially increases the efficiency of dust collection of tail gas;
Highly practical, at low cost ball valve, third valve 27 and the 4th valve can be selected in first valve 4 and the second valve 26 28 optional Pneumatic gate valves.
The middle part of feed barrel 33 is connected to the bottom of an ash handling equipment 34, and the end of feed barrel 33 is compensated by metal Device 35, dynamic and static sealing device 36 are connect with reaction kettle.Shaftless spiral blade, the cross section of blade are installed inside feed barrel 33 It is not greater than the 3/4 of cylinder internal diameter cross section, it is generally 5~20 meters desirable, while 33 outside of feed barrel can be kept the temperature with heat-preservation cotton, So that powder coal and the sufficient heat exchange of high-temperature oil gas.
Heat safe, the high molecular material of oleophilic drainage is installed inside ash handling equipment 34
Dynamic and static sealing device 36 is mainly by gland component, enhancing soft graphite disk, sealed outer ring component and sealing inner shield ring The compositions such as component.
Reaction kettle 37 is Rotatable mechanism, and the material in reaction kettle 37 can be made to be heated evenly;Reaction kettle 37 is externally provided with heating Case, and equipped with the heat conducting pipe through the reaction kettle 37, which is connected to the heater box;
A kind of above-mentioned coal using flue gas dries dedusting and the course of work of feed system is:
1) stocking system 1 is conveyed:The materials such as the powder coal in raw coal stockyard pass through first under the action of manual operation is grabbed bucket Conveying device 2 enters storage, caching, the first spare holding vessel 3, passes through 3 the first valve of lower end 4 of the first holding vessel It is turned on and off, conveying material is to second conveyer 5, and second conveyer 5 can be made of multi-stage conveyance unit, including scraper plate Conveyer, screw conveyor etc., then material is delivered to by the first screw 6 by feed inlet 12.
2) drying system 10:14 driving drum 11 of driving device rotate, the materials such as powder coal feeding seal case 18 into Material mouth 12 enters, and the hot winds such as waste heat flue gas enter from hot wind inlet 13, and the material in roller 11 is constantly turned over L-type lifting blade 17 It rolls down, freely fall into and slowly moves ahead, after material comes into full contact with drying with hot wind, discharge port 15 of the material from discharging seal box 19 Go out, enter back into third conveying device 25 if needed, enter back into the roller 11 of next cycle, is until drying reaches requirement Only;
3) dusting and desulfuring system 20:Waste heat flue gas with a certain amount of dust goes out from hot-blast outlet 16, makees in air-introduced machine 22 Enter 21 dedusting of deduster with lower, 23 desulfurization of desulfurizer enters air after qualified discharge.
4) feed system 30 is sealed:Dry material up to standard conveying device effect under by the second valve 26 according to demand Free switching is stored for future use into the second holding vessel 31, wait for the used time open also can free switching third valve 27, pass through second Screw 32 is sent into feed barrel 33 from the 4th valve 28, and the reaction kettle 37 that feed barrel 33 is rotated with bedroom is mended by metal It repays device 35 to connect with dynamic and static sealing device 36, the high-temperature dusty gas in reaction kettle 37 is gone out by feed barrel 33 into ash disposal again 34 ash disposal of device, the high-temperature oil gas after ash disposal enter back into next link.
The foregoing is merely the preferable implementation examples of the present invention, are not intended to restrict the invention, it is all in spirit of that invention and Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of coal using flue gas dries dedusting and feed system, it is characterised in that including transmission stocking system (1), dry Dry systems (10), dusting and desulfuring system (20) and sealing feed system (30),
The transmission stocking system (1) includes the second conveyer (2) for conveying raw coal, the second conveyer (2) Connect the first holding vessel (3), the outlet end connection second conveyer (5) of the first holding vessel (3), the second conveyer (5) drying system is connected;
The drying system (10) includes the roller (11) with driving device (14), the input end setting of the roller (11) Feeding seal case (18), outlet end setting discharging seal box (19);The roller (11) is at least level-one;
The dusting and desulfuring system (20) includes sequentially connected deduster (21), air-introduced machine (22) and desulfurizer (23), The deduster is connected to the hot-blast outlet end of the drying system (10);
The sealing feed system (30) includes the second holding vessel (31), and the second holding vessel (31) is sequentially connected the second spiral dress (32), feed barrel (33) and reaction kettle (37) are set, ash handling equipment (34) is set on the feed barrel (33), it is described 3/4 of helical blade cross section no more than cross section in cylinder in feed barrel (33).
2. coal drying dedusting as described in claim 1 and feed system, which is characterized in that feeding seal case (18) packet Containing feed inlet (12) and hot wind inlet (13), the feed inlet (2) is on the top or side of feeding seal case (18) Portion;The discharging seal box (19) includes discharge port (15) and hot-blast outlet (16), and the discharge port (5) is close in discharging The bottom end of joint sealing (15) or side lower.
3. coal drying dedusting as described in claim 1 and feed system, which is characterized in that described roller (11) inner wall is equipped with L-type lifting blade (17), the L-type lifting blade (17) is along inner wall of rotary drum around distribution.
4. coal drying dedusting as described in claim 1 and feed system, which is characterized in that the roller (11) includes more Grade is sequentially connected in series, is mixed mutually with parallel connection in parallel or series.
5. coal drying dedusting as described in claim 1 and feed system, which is characterized in that the roller (11) includes level Arrangement is in tilted layout.
6. coal drying dedusting as described in claim 1 and feed system, which is characterized in that second screw (8) For shaftless screw or there is axis helical structure.
7. coal drying dedusting as described in claim 1 and feed system, which is characterized in that the object between the roller (11) Material is conveyed by third transmission device (25).
8. coal as described in claim 1 drying dedusting and feed system, which is characterized in that the discharging seal box (18) and Access hole (24) is separately installed on feeding seal case (19);Insulating layer is installed outside the roller (11).
9. coal as described in claim 1 drying dedusting and feed system, which is characterized in that the feed barrel (33) and instead Kettle (37) is answered to be connected by metal compensator (35) and dynamic and static sealing device (36).
10. coal drying dedusting as described in claim 1 and feed system, which is characterized in that second holding vessel (31) The second valve (26) and third valve (27) are separately installed at inlet port and outlet port;Described feed barrel (33) feed inlet Place is equipped with the 4th valve (28).
CN201810901305.8A 2018-08-09 2018-08-09 A kind of coal using flue gas dries dedusting and feed system Pending CN108679963A (en)

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CN110345713A (en) * 2019-08-01 2019-10-18 江西赫柏康华制药设备有限公司 A kind of multifunctional composite Centrifugal vibration counter current solid drying machine and method
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CN202692618U (en) * 2012-06-06 2013-01-23 王松正 External-heating-type dual-layer drying kiln
CN202853308U (en) * 2012-09-01 2013-04-03 何树香 Drying stove utilizing small-sized boiler smoke dust waste heat
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