CN107903924A - A kind of uplink heat accumulating type fine coal fast pyrogenation reaction system and method - Google Patents

A kind of uplink heat accumulating type fine coal fast pyrogenation reaction system and method Download PDF

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Publication number
CN107903924A
CN107903924A CN201711166196.1A CN201711166196A CN107903924A CN 107903924 A CN107903924 A CN 107903924A CN 201711166196 A CN201711166196 A CN 201711166196A CN 107903924 A CN107903924 A CN 107903924A
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China
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gas
pyrolysis
semicoke
uplink
condenser
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CN201711166196.1A
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吴道洪
彭丽
孟嘉乐
张宏伟
郑倩倩
肖磊
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Beijing Shenwu Power Technology Co Ltd
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Beijing Shenwu Power Technology Co Ltd
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Priority to CN201711166196.1A priority Critical patent/CN107903924A/en
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    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10BDESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B47/00Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
    • C10B47/18Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion with moving charge
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10BDESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B53/00Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
    • C10B53/04Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10BDESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B57/00Other processes not covered before; Features of destructive distillation processes in general

Abstract

The present invention relates to a kind of uplink heat accumulating type fine coal fast pyrogenation reaction system and method.System includes uplink heat storage type pyrolysis stove, cyclone separator, semicoke condenser and oil-gas condenser, uplink heat storage type pyrolysis stove includes furnace body and radiant tube, the top of furnace body is equipped with product exit, the bottom of furnace body is equipped with gas feed and reaction-ure feeding mouth, radiant tube is arranged in the furnace body, and radiant tube is one group of heat accumulation type radiant tube being vertically intervally arranged;The product inlet of cyclone separator is connected with the product exit of uplink heat storage type pyrolysis stove;The semicoke import of semicoke condenser is connected with the semicoke outlet of cyclone separator;The oil and gas import of oil-gas condenser is connected with the oil gas vent of cyclone separator.The present invention realizes effective control of pyrolytic reaction depth and reaction process, improves conversion ratio, improves target product yield;Technological process is simple, temperature control is accurate, temperature adjustment is convenient, reduces the failure rate of system, improves the thermal efficiency of system, reduces tar dustiness.

Description

A kind of uplink heat accumulating type fine coal fast pyrogenation reaction system and method
Technical field
The present invention relates to pulverized coal pyrolysis technical field, more particularly to a kind of uplink heat accumulating type fine coal fast pyrogenation reaction system And method.
Background technology
Coal is one of conventional resource that proved reserves are the abundantest in the world, as coal production maximum in the world and Country of consumption, the energy resource structure feature in China are rich coal, oil-poor, few gas.It is the urgent of national product that the clean and effective of coal, which utilizes, Demand.At this stage, the coal resources in China mainly have several Land use systems such as burning, gasification, liquefaction, pyrolysis.Coal directly fires Burning can produce heat, and efficiency is than relatively low, and emission would seriously pollute the environment;Coal Gasification, liquefaction process generally require full The reaction condition of the harshness such as sufficient high temperature, high pressure, oxygen-enriched, this cost requirement to reactor performance and technical process are higher.Phase Than in these types of Land use systems, pyrolysis of coal converts coal into solid-state, liquid and gaseous product, there are obvious advantage and prospect.
At present, from the point of view of mode of heating, domestic and international existing pyrolytic process uses porcelain ball and thermal decomposition product semicoke conduct more Coal gas after solid thermal carriers, or product char Gasification is as mode of heatings such as gas heat carriers.But these mode of heatings are related to The processes such as heating, separation to heat carrier, can cause system process to be grown, system failure rate is higher.
Moreover, finding that porcelain ball is heated to more than 600 DEG C and recycled repeatedly in experiment, abrasion sex chromosome mosaicism can be produced;It is glutinous Knot property coal can be attached in pyrolytic process on porcelain ball, and only non-caking coal and Iight sticky coal can be used for the technique, usually Tar yield is not high.
During using semicoke as heat carrier, since a large amount of burnt tiny fragments of stone, coal, etc. fine graineds are brought into tar, solid particulate matter in tar Content is up to 40%-50%, and the processing and utilization to tar bring difficulty;Using can be because of tar and particle during caking coal Aggegation and cause failure;The semicoke of coal and heat is mixed using mechanical agitation, abrasion is more serious, and equipment amplification, which exists, asks Topic.
Using gas as heat carrier, be related to heating, separate, cause system process to be grown, system failure rate compared with It is high;Using combustible gas as heat carrier, combustible gas in warm if there is leakage phenomenon, may be with the heating of heating chamber Media contact, brings security risk.
In short, the solid thermal carriers such as semicoke, porcelain ball have seriously affected the air heats such as the disposal ability of pyrolysis furnace apparatus, coal gas There is also larger security risk for carrier preheating.
In addition, the pyrolysis oven used at present, majority is fixed bed, or has the function of downflow fluidized bed, and pulverized coal pyrolysis is not Abundant or volatility product twice decomposition is serious, causes conversion ratio and target product yield too low.It would therefore be highly desirable to research and develop a kind of new Type pyrolytic process.
The content of the invention
In view of the above-mentioned problems, the present invention is intended to provide a kind of uplink heat accumulating type fine coal fast pyrogenation reaction system and method, To simplify system process, the failure rate of system is reduced so that system temperature control is accurate, temperature adjustment is convenient, to pyrolytic reaction depth It control effectively with reaction process, improves converting rate, improve target product yield, improves the thermal efficiency of system.
The present invention provides a kind of uplink heat accumulating type fine coal fast pyrogenation reaction system, and the system comprises uplink heat-accumulation type hot Solution stove, cyclone separator, semicoke condenser and oil-gas condenser, the uplink heat storage type pyrolysis stove include furnace body and radiant tube, The top of the furnace body is equipped with product exit, and the bottom of the furnace body is equipped with gas feed and reaction-ure feeding mouth, the reaction Position of the thing feed inlet on the vertical direction of the furnace body is higher than the gas feed;The radiant tube is arranged on the furnace body Interior, above the reaction-ure feeding mouth, the radiant tube is one group of heat accumulation type radiant tube being vertically intervally arranged; The product inlet of the cyclone separator is connected with the product exit of the uplink heat storage type pyrolysis stove;The semicoke condenser Semicoke import is connected with the semicoke outlet of the cyclone separator;The oil and gas import of the oil-gas condenser and the cyclonic separation The oil gas vent of device is connected.
Above-mentioned system, the uplink heat storage type pyrolysis stove further include gas distribution grid, and the gas distribution grid is arranged at In the furnace body, below the reaction-ure feeding mouth, the gas feed connection is distributed on the gas distribution grid One group of air inlet.
Above-mentioned system, the radiant tube both ends are both provided with burner, the burner respectively with outside the furnace body Storage heater be connected, the burner and the storage heater correspond.
Above-mentioned system, the system also includes semicoke collector, electric precipitation decontaminating separator, tar well, pyrolysis Gas condenser, oil water separator, pyrolysis water collector and pyrolysis gas collector;The semicoke collector and the semicoke condenser Condensation semicoke outlet be connected;The gas-liquid import of the electric precipitation decontaminating separator and the gas liquid outlet phase of the oil-gas condenser Even;The tar import of the tar well is connected with the tar outlet of the electric precipitation decontaminating separator;The pyrolysis air cooling The oil-containing water pyrolysis gas import of condenser is connected with the oil-containing water pyrolysis gas outlet of the electric precipitation decontaminating separator;The grease point Grease import from device is connected with the grease outlet of the pyrolysis gas condenser;The pyrolysis water collector and the water-oil separating The pyrolysis water out of device is connected;The pyrolysis gas collector is connected with the pyrolysis gas outlet of the pyrolysis gas condenser.
Above-mentioned system, is equipped with heat exchanger in the semicoke condenser, for recycling the heat of semicoke, the heat exchanger Pyrolysis gas import is connected with the pyrolysis gas collector, and the pyrolysis gas outlet of the heat exchanger is connected with powder coal charge device.
Above-mentioned system, the bottom of the uplink heat storage type pyrolysis stove are equipped with gas compressor, for being stored to the uplink Hot type pyrolysis oven conveying hoisting gas;The gas access of the gas compressor is connected with the pyrolysis gas outlet of the heat exchanger.
The present invention also provides a kind of method being pyrolyzed using above-mentioned uplink heat accumulating type fine coal fast pyrogenation reaction system, Including:
Coal dust is sent into the uplink heat storage type pyrolysis stove from the reaction-ure feeding mouth of the uplink heat storage type pyrolysis stove In furnace body;
Lift gas is sent into the uplink by the gas feed from the bottom of the uplink heat storage type pyrolysis stove to store In the furnace body of hot type pyrolysis oven;
The coal dust is set to be transported under the action of the lift gas along the lower to upper part of the uplink heat storage type pyrolysis stove It is dynamic;
The coal dust is heated by the radiant tube and pyrolytic reaction occurs, generation gaseous state, liquid product and solid semicoke;
The product of pyrolytic reaction generation is discharged from the top of the uplink heat storage type pyrolysis stove;
Semicoke, gaseous state and liquid product are isolated by the cyclone separator;
Semicoke is collected by the semicoke condenser;
The gaseous state and liquid product are condensed by the oil-gas condenser.
Above-mentioned method, the fire box temperature of the uplink heat storage type pyrolysis stove is 450-950 DEG C, furnace pressure 0.2- 0.4Mpa;For the temperature control of the radiant tube at 500-1000 DEG C, the temperature difference on the single radiant tube is not higher than 30 DEG C.
Above-mentioned method, when producing tar, the fire box temperature of the furnace body is 500-700 DEG C;When medium-heat-value coal in production During gas, the fire box temperature of the furnace body is 700-900 DEG C.
Above-mentioned method, after being exchanged heat by being passed through pyrolysis gas into the heat exchanger of the semicoke condenser, makes heating Pyrolysis gas be sent into the bottom of the uplink heat storage type pyrolysis stove as lift gas, and by the uplink heat storage type pyrolysis furnace bottom The coal dust in portion is fed through the inside of the uplink heat storage type pyrolysis stove.
The uplink heat accumulating type fine coal fast pyrogenation reaction technology of the present invention, by controlling lift gas flow, regulates and controls particle Speed and particle residence time, so as to fulfill effective control for pyrolytic reaction depth and reaction process, improve conversion ratio, Improve target product yield;The present invention uses more heat accumulation type radiant tubes, and heat source is provided for the coal dust in pyrolysis oven, without heat Carrier and mechanical rotation device, technological process is simple, system temperature control is accurate, temperature adjustment is convenient, without gas and solid thermal carriers Heating, separation process, reduce the failure rate of system, can combine convection current, heat transfer and radiant heat transfer control, improve system The thermal efficiency, reduce tar dustiness.
Brief description of the drawings
Fig. 1 is uplink heat accumulating type fine coal fast pyrogenation reaction system schematic diagram of the embodiment of the present invention;
Fig. 2 is uplink heat accumulating type fine coal fast pyrogenation furnace structure schematic diagram of the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and examples, the embodiment of the present invention is described in more details, so as to energy The advantages of enough more fully understanding the solution of the present invention and various aspects.However, specific embodiments described below and implementation Example is for illustrative purposes only, rather than limitation of the present invention.
As shown in Figure 1, the present invention provides a kind of uplink heat accumulating type fine coal fast pyrogenation reaction system, the system is mainly wrapped Include uplink heat storage type pyrolysis stove 4, cyclone separator 6, semicoke condenser 8 and oil-gas condenser 11.
As shown in Fig. 2, the uplink heat storage type pyrolysis stove 4 includes furnace body 45 and radiant tube 46, the top of the furnace body 45 Equipped with product exit 47, the bottom of the furnace body 45 is equipped with gas feed 41 and reaction-ure feeding mouth 44, the reaction-ure feeding 44 position on the vertical direction of the furnace body of mouth is higher than the gas feed 41;The radiant tube 46 is arranged on the furnace body 45 Interior, above the reaction-ure feeding mouth 44, the radiant tube 46 is one group of heat accumulating type spoke being vertically intervally arranged Penetrate pipe.
As shown in Figure 1, the product exit of the product inlet of the cyclone separator 6 and the uplink heat storage type pyrolysis stove 4 It is connected;The semicoke import of the semicoke condenser 8 is connected with the semicoke outlet of the cyclone separator 6;The oil-gas condenser 11 oil and gas import is connected with the oil gas vent of the cyclone separator 6.
To ensure that the reactant of pyrolysis furnace bottom there are enough momentum, and uniformly moved upwards along burner hearth, uplink heat accumulating type Pyrolysis oven 4 further includes gas distribution grid 42.The gas distribution grid is arranged in the furnace body 45, positioned at the reaction-ure feeding The lower section of mouth 44, the gas feed 41 connect one group of air inlet 43 being distributed on the gas distribution grid 42.
In said system, 46 both ends of radiant tube are both provided with burner, burner respectively with the storage heater phase outside furnace body Even, the burner is corresponded with the storage heater.More heat accumulation type radiant tubes are the pyrolytic reaction in pyrolysis oven reactor Heat source is provided.
Above-mentioned system, the system may also include semicoke collector 9, electric precipitation decontaminating separator 12, tar well 14th, gas condenser 16, oil water separator 18, pyrolysis water collector 20 and pyrolysis gas collector 22 are pyrolyzed;The semicoke collector 9 It is connected with the condensation semicoke outlet of the semicoke condenser 8;The gas-liquid import of the electric precipitation decontaminating separator 12 and the oil The gas liquid outlet of gas condenser 11 is connected;The tar import of the tar well 14 and the electric precipitation decontaminating separator 12 Tar outlet is connected;The pyrolysis oil-containing water pyrolysis gas import of gas condenser 16 and containing for the electric precipitation decontaminating separator 12 Grease pyrolysis gas outlet is connected;The grease import of the oil water separator 18 and the grease of the pyrolysis gas condenser 16 export phase Even;The pyrolysis water collector 20 is connected with the pyrolysis water out of the oil water separator 18;The pyrolysis gas collector 22 with The pyrolysis gas outlet of the pyrolysis gas condenser 16 is connected.
Uplink heat storage type pyrolysis stove 4 is used to coal dust 1 being pyrolyzed, generation gaseous state, liquid and solid product and dust 5.Whirlwind Separator 6 is used to pyrogenous origin product isolating semicoke 7 and gaseous state and liquid product 10.Semicoke condenser 8 is used to divide Separate out the semicoke 7 come to condense, easy to the recycling of follow-up semicoke collector 9.
Gaseous state and liquid product 10 are separated through electric precipitation decontaminating separator 12 again after the condensation of oil-gas condenser 11, are obtained To tar 13 and the pyrolysis gas 15 of oil-containing water.Isolated tar 13 is delivered to tar well 14 and carries out tar recycling, point From obtained oil-containing water pyrolysis gas 15 further be delivered to pyrolysis gas condenser 16 condensed, obtain grease 17 and pyrolysis gas 21.Grease 17 is delivered to oil water separator 18 and is separated, and further obtains pyrolysis water 19 and tar 13.Tar 13 can be delivered to Tar well 14 carries out tar recycling.Pyrolysis water 19 is further delivered to pyrolysis water collector 20 and is recycled.Pyrolysis gas 21 Pyrolysis gas collector 22 is delivered to be recycled.
Above-mentioned system, is equipped with heat exchanger in the semicoke condenser 8, for recycling the heat of semicoke, the heat exchanger Pyrolysis gas import be connected with the pyrolysis gas collector 22, the pyrolysis gas outlet of the heat exchanger is connected with powder coal charge device 3. Coal bunker 2 can be also set before feeder 3.
Above-mentioned system, the bottom of the uplink heat storage type pyrolysis stove are equipped with gas compressor 23, for the uplink 4 conveying hoisting gas 24 of heat storage type pyrolysis stove;The gas access of the gas compressor 23 and the pyrolysis gas of the heat exchanger go out Mouth is connected.
Fine coal is pyrolyzed using said system, technique is as described below.
After dry coal dust 1 is crushed to 90% particle less than below 6mm, it is fitted into coal bunker 2, is sprayed into through feeder 3 4 bottom of uplink heat storage type pyrolysis stove.Row powder fan is installed in feeder 3, it, which is acted on, is pyrolyzed using 200-300 DEG C after preheating Coal dust 1 in coal bunker 2 is sprayed into the top of uplink heat storage type pyrolysis stove 4 by gas 24.
4 fire box temperature of uplink heat storage type pyrolysis stove is 450-950 DEG C, the fire box temperature of uplink heat storage type pyrolysis stove 4 according to Target pyrolysis gas quality or coal inlet amount specifically determine.Preferable temperature is 500-900 DEG C, if for the purpose of producing tar, stove Bore temperature is arranged on 500-700 DEG C;If based on calorific value of gas in production, fire box temperature is arranged on 700-900 DEG C.
Furnace pressure is 0.2-0.4Mpa.Fire box temperature is provided by more radiant tubes, and radiant tube temperature control is in 500- 1000 DEG C, the temperature difference on single heat accumulation type radiant tube is not higher than 30 DEG C.Coal dust 1 in uplink heat storage type pyrolysis stove 4 is being lifted Under the action of gas 24, while from the bottom of uplink heat storage type pyrolysis stove 4 to top movements, the fast pyrogenation in 2-10s, produces A large amount of gaseous state, liquid and solid products and a small amount of dust 5.Product and dust 5 are discharged from the top of uplink heat storage type pyrolysis stove 4. Gaseous state and liquid product are pyrolysis gas and water and tar, solid product are semicoke.
Wherein, the heat-accumulation combustion process of above-mentioned heat accumulation type radiant tube is as follows:Heat accumulation type radiant tube is set respectively at tube body both ends Burner is equipped with, is entered to after fuel gas and the configured regenerative chamber preheating outside pyrolysis oven of temperature gas and is arranged on radiant tube A Combustion reaction occurs for the burner of port, and the flame that one end burner combustion produces forms temperature when spraying along radiant tube direction Gradient, i.e., along radiant tube A ends to the opposite side B ends of the radiant tube, temperature downward trend in gradient.After the completion of A end burnings, A ends The flue gas that burning produces enters to B ends regenerative chamber, pre-heating fuel and combustion air, and the fuel and combustion air after preheating enter to radiation Pipe B end burner, temperature gradient is also formed when the flame that other end burner combustion produces is spraying.Same radiant tube both ends Burner alternating reversing combustion.
When the burner at both ends alternately burns, two temperature gradients formed are superimposed so that whole heat accumulating type Radiant tube bulk temperature is evenly distributed.To ensure that pyrolysis oven internal-response material is heated evenly, on single heat accumulation type radiant tube Temperature difference is not higher than 30 DEG C.In pyrolysis oven inside reactor, more heat accumulation type radiant tubes are vertically intervally arranged, and ensure each Regional temperature is evenly distributed.Wherein, A ends can be the either port of radiant tube, and B ends are another corresponding to same radiant tube A ends One end.
It is fed through from the product and dust 5 of the discharge of the top of uplink heat storage type pyrolysis stove 4 in high temperature cyclone separator 6, semicoke 7 Separated from gas, semicoke collector 9 is entered to by semicoke condenser 8, as solid product.Superfine dust is with cigarette Gas is discharged.
Heat exchanger, such as heat exchange coil are added in semicoke condenser 8, recycles the heat of semicoke.Pyrolysis is passed through in heat exchange coil Gas 21, pyrolysis gas 21 exchange heat with semicoke, and the 200-300 DEG C of pyrolysis gas 24 (also known as " lift gas ") after preheating, a part is passed through Gas compressor 23, by 24 gas-phase transport of pyrolysis gas to the bottom of uplink heat storage type pyrolysis stove 4, and is used for uplink heat-accumulation type hot The coal dust of 4 bottom of solution stove is fed through inside uplink heat storage type pyrolysis stove 4, in the radiation of radiant tube, conduction, convection current heat transfer effect Under, pyrolytic reaction occurs;200-300 DEG C of gas 24 after part preheating is fed through feeder 3, is fed for coal dust.
The speed that gas 24 sprays into is 5-10m/s.Gas sprays into speed and is controlled by gas compressor 23, the speed of coal dust 1 Speed depending on lift gas 24.
300-700 DEG C of pyrolysis oil gas (gaseous state and liquid product) 10 is come out from high temperature cyclone separator 6 and is fed through oil gas Condenser 11, by pyrolysis oil gas condensation to 70-90 DEG C.Gas mixture is pyrolyzed from oil-gas condenser 11 to purify by electric precipitation Separator 12 is separated.The tar 13 separated from 12 lower part of electric precipitation decontaminating separator is fed through in tar well 14 As liquid form product.
The pyrolysis gas 15 for the oil-containing water separated from 12 top of electric precipitation decontaminating separator passes through pyrolysis gas condenser 16, Condensed pyrolysis gas 21 and grease 17 are fed through pyrolysis 20 He of water collector from 16 upper and lower part of pyrolysis gas condenser respectively In oil water separator 18.Tar 13 of the grease 17 further after the separation of oil water separator 18 is fed through in tar well 14, Pyrolysis water 19 after separation is fed through in pyrolysis water collector 20.Meanwhile through non-purified complete in electric precipitation decontaminating separator 12 Oil gas circulation be again introduced into oil-gas condenser 11, carry out dust separation, obtain tar 13 and pyrolysis gas 21.
The uplink heat accumulating type fine coal fast pyrogenation reaction system of the present invention, by controlling lift gas flow, regulates and controls particle Speed and particle residence time, so as to fulfill effective control for pyrolytic reaction depth and reaction process, improve conversion ratio, carry High target product yield;
The present invention uses more heat accumulation type radiant tubes, heat source is provided for the coal dust in pyrolysis oven, without heat carrier and machinery Tumbler, technological process is simple, system temperature control is accurate, temperature adjustment is convenient, and heating without gas and solid thermal carriers, separated Journey, reduces the failure rate of system.
The present invention can combine convection current, heat transfer and radiant heat transfer control, improve the thermal efficiency of system.
The present invention reduces tar dustiness compared with semicoke is as heat carrier.
The technique of the present invention is strong to coal adaptability, no matter equal for non-caking coal, Iight sticky coal, strong caking coal It is suitable for.
Embodiment one
A kind of uplink heat accumulating type jet coal low-temperature rapid thermal solution reaction system, as shown in Figure 1.By it is dried containing The jet coal of 8.64% moisture is crushed to below 6mm, and coal particle size distribution is as shown in table 1, the Industrial Analysis of coal dust and element point Analysis is as shown in table 2 and table 3.Coal dust is fitted into coal bunker 2,4 bottom of uplink heat storage type pyrolysis stove is sprayed into through feeder 3.With pyrolysis Coal dust 1 is fed through top by the gas of generation by 4 bottom of uplink heat storage type pyrolysis stove, is taken respectively at a temperature of different heating twice Coal dust inlet amount is 100kg/ (m2﹒ s) carry out thermal decomposition test.Gas sprays into speed and is controlled by gas compressor 23, the speed of gas Spend for 5m/s.The radiant tube surface temperature for being pyrolyzed uplink heat storage type pyrolysis stove 4 twice is respectively 600 DEG C and 500 DEG C, is pyrolyzed twice Fire box temperature is respectively 500 DEG C and 450 DEG C, and the temperature difference on single heat accumulation type radiant tube is no more than 30 DEG C.Burner hearth is pyrolyzed twice Pressure be respectively 0.3Mpa and 0.2Mpa.Coal dust 1 in uplink heat storage type pyrolysis stove 4 under lift gas effect, while from Burner hearth bottom is to top movements, the fast pyrogenation in 5s, generates product and dust.Wherein, contain in first time thermal decomposition product 12.33% tar, 10.51% pyrolysis water, 12.51% pyrolysis gas and 64.65% semicoke.Contain in second of thermal decomposition product 12.55% tar, 11.36% pyrolysis water, 10.55% pyrolysis gas and 65.54% semicoke.Product and dust are from uplink heat-accumulation type hot The discharge of the top of stove 4 is solved, and is fed through in 500 DEG C of cyclone separator 6.Semicoke is separated from the gas of cyclone separator 6, It is fed through through the semicoke condenser 8 that excess temperature is 25 DEG C in semicoke collector 9, as solid product.In cyclonic separation gaseous state and Liquid product removes dust, after impurity by electric precipitation decontaminating separator 12, and tar is from 12 lower part of electric precipitation decontaminating separator Separate out to be fed through tar well 14.The gaseous state and liquid product separated from 12 top of electric precipitation decontaminating separator are through 25 DEG C pyrolysis gas condenser 16 condenses, and condensed pyrolysis gas and grease are fed through pyrolysis water from condenser upper and lower part respectively and receive In storage 20 and oil water separator 18.Tar of the grease further after the separation of oil water separator 18 is fed through tar well 14 In, the pyrolysis water after separation is fed through in pyrolysis water collector 20.Meanwhile through non-purified complete in electric precipitation decontaminating separator 12 Oil gas circulation be again introduced into oil-gas condenser 11, carry out dust separation, obtain tar and pyrolysis gas.
1 jet coal particle diameter distribution of table
2 long flame proximate analysis of coal (%) of table
3 long flame ultimate analysis of coal (%) of table
M hereinadRepresent moisture;AadRepresent ash content;VadRepresent volatile matter;CadRepresent fixed carbon content;HadRepresent hydrogen Content;OadRepresent oxygen content;NadRepresent nitrogen content;SadRepresent sulfur content.
Embodiment two
A kind of uplink heat accumulating type lignite medium temperature fast pyrogenation reaction system, as shown in Figure 1.By it is dried containing The lignite of 15.10% or so moisture is crushed to below 6mm, and coal particle size distribution is as shown in table 4, the Industrial Analysis of coal dust and element Analysis is as shown in table 5 and table 6.Coal dust is fitted into coal bunker 2,4 bottom of uplink heat storage type pyrolysis stove is sprayed into through feeder 3.With heat Solve the gas produced and coal dust 1 is fed through top by 4 bottom of uplink heat storage type pyrolysis stove, at a temperature of different heating twice respectively It is 100kg/ (m to take coal dust inlet amount2﹒ s) carry out thermal decomposition test.Gas sprays into speed and is controlled by gas compressor 23, gas Speed is 7m/s.It is respectively 900 DEG C, 1000 DEG C to be pyrolyzed uplink heat storage type pyrolysis furnace radiating pipe surface temperature twice, is pyrolyzed twice Fire box temperature is respectively 700 DEG C and 950 DEG C, and the temperature difference on single heat accumulation type radiant tube is no more than 30 DEG C.Burner hearth is pyrolyzed twice Pressure be respectively 0.3Mpa and 0.4Mpa.Coal dust 1 is under lift gas effect in uplink heat storage type pyrolysis stove 4, while from stove Thorax bottom is to top movements, the fast pyrogenation in 7s, generates product and dust.Wherein, 1.20% is contained in first time thermal decomposition product Tar, 7.52% pyrolysis water, 38.71% pyrolysis gas and 52.27% semicoke.In second of thermal decomposition product containing 0.86% tar, 6.11% pyrolysis water, 41.85% pyrolysis gas and 51.18% semicoke.Product and dust are discharged from uplink heat storage type pyrolysis furnace roof portion, And it is fed through in 800 DEG C of cyclone separator 6.Semicoke is separated from the gas of cyclone separator 6, is 25 DEG C through excess temperature Semicoke condenser 8 be fed through in semicoke collector 9, as solid product.Gaseous state and liquid product are by electricity in cyclonic separation After dust separation separator 12 removes dust, impurity, tar is separated from 12 lower part of electric precipitation decontaminating separator and is fed through Jiao Oil interceptor 14.The gaseous state and liquid product separated from 12 top of electric precipitation decontaminating separator are through 25 DEG C of pyrolysis gas condensers 16 condensations, condensed pyrolysis gas and grease are fed through pyrolysis water collector 20 and grease point from condenser upper and lower part respectively From in device 18.Tar of the grease further after the separation of oil water separator 18 is fed through in tar well 14, the heat after separation Xie Shui is fed through in pyrolysis water collector 20.Meanwhile through non-purified complete oil gas circulation in electric precipitation decontaminating separator 12 again It is secondary to enter in oil-gas condenser 11, dust separation is carried out, obtains tar and pyrolysis gas.
4 lignite particle diameter distribution of table
5 lignite Industrial Analysis (%) of table
6 lignite elemental analysis (%) of table
Finally it should be noted that:Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and simultaneously The non-restriction to embodiment.For those of ordinary skill in the field, can also do on the basis of the above description Go out other various forms of changes or variation.There is no necessity and possibility to exhaust all the enbodiments.And thus drawn Among the obvious changes or variations that Shen goes out is still in protection scope of the present invention.

Claims (10)

1. a kind of uplink heat accumulating type fine coal fast pyrogenation reaction system, it is characterised in that the system comprises uplink heat-accumulation type hot Stove, cyclone separator, semicoke condenser and oil-gas condenser are solved, wherein,
The uplink heat storage type pyrolysis stove includes furnace body and radiant tube, and the top of the furnace body is equipped with product exit, the furnace body Bottom be equipped with gas feed and reaction-ure feeding mouth, position of the reaction-ure feeding mouth on the vertical direction of the furnace body Higher than the gas feed;
The radiant tube is arranged in the furnace body, and above the reaction-ure feeding mouth, the radiant tube is for one group along vertically The heat accumulation type radiant tube that direction is intervally arranged;
The product inlet of the cyclone separator is connected with the product exit of the uplink heat storage type pyrolysis stove;The semicoke condensation The semicoke import of device is connected with the semicoke outlet of the cyclone separator;The oil and gas import of the oil-gas condenser and the whirlwind The oil gas vent of separator is connected.
2. system according to claim 1, it is characterised in that the uplink heat storage type pyrolysis stove further includes gas distribution Plate, the gas distribution grid are arranged in the furnace body, and below the reaction-ure feeding mouth, the gas feed connection is equal One group of air inlet being distributed on the gas distribution grid.
3. system according to claim 1, it is characterised in that the radiant tube both ends are both provided with burner, the combustion Burner is connected with the storage heater outside the furnace body respectively, and the burner is corresponded with the storage heater.
4. system according to claim 1, it is characterised in that the system also includes semicoke collector, electric precipitation to purify Separator, tar well, pyrolysis gas condenser, oil water separator, pyrolysis water collector and pyrolysis gas collector;The semicoke Collector is connected with the condensation semicoke outlet of the semicoke condenser;The gas-liquid import of the electric precipitation decontaminating separator with it is described The gas liquid outlet of oil-gas condenser is connected;The tar import of the tar well and the tar of the electric precipitation decontaminating separator Outlet is connected;The oil-containing water pyrolysis gas import of the pyrolysis gas condenser and the oil-containing aquathermolysis of the electric precipitation decontaminating separator Gas outlet is connected;The grease import of the oil water separator is connected with the grease outlet of the pyrolysis gas condenser;The pyrolysis Water collector is connected with the pyrolysis water out of the oil water separator;The pyrolysis gas collector and the pyrolysis gas condenser Pyrolysis gas outlet is connected.
5. system according to claim 4, it is characterised in that heat exchanger is equipped with the semicoke condenser, for recycling The heat of semicoke, the pyrolysis gas import of the heat exchanger are connected with the pyrolysis gas collector, and the pyrolysis gas of the heat exchanger goes out Mouth is connected with powder coal charge device.
6. system according to claim 5, it is characterised in that the bottom of the uplink heat storage type pyrolysis stove is equipped with gas pressure Contracting machine, for the uplink heat storage type pyrolysis stove conveying hoisting gas;The gas access of the gas compressor is changed with described The pyrolysis gas outlet of hot device is connected.
7. it is pyrolyzed a kind of using any one of claim 1 to the 6 uplink heat accumulating type fine coal fast pyrogenation reaction system Method, it is characterised in that the described method includes:
Coal dust is sent into the furnace body of the uplink heat storage type pyrolysis stove from the reaction-ure feeding mouth of the uplink heat storage type pyrolysis stove It is interior;
Lift gas is sent into the uplink heat accumulating type from the bottom of the uplink heat storage type pyrolysis stove by the gas feed In the furnace body of pyrolysis oven;
The coal dust is set to be moved under the action of the lift gas along the lower to upper part of the uplink heat storage type pyrolysis stove;
The coal dust is heated by the radiant tube and pyrolytic reaction occurs, generation gaseous state, liquid product and solid semicoke;
The product of pyrolytic reaction generation is discharged from the top of the uplink heat storage type pyrolysis stove;
Semicoke, gaseous state and liquid product are isolated by the cyclone separator;
Semicoke is collected by the semicoke condenser;
The gaseous state and liquid product are condensed by the oil-gas condenser.
8. the method according to the description of claim 7 is characterized in that the fire box temperature of the uplink heat storage type pyrolysis stove is 450- 950 DEG C, furnace pressure 0.2-0.4Mpa;The temperature control of the radiant tube is at 500-1000 DEG C, on the single radiant tube Temperature difference be not higher than 30 DEG C.
9. according to the method described in claim 8, it is characterized in that, when producing tar, the fire box temperature of the furnace body is 500-700℃;When calorific value of gas in production, the fire box temperature of the furnace body is 700-900 DEG C.
10. the method according to the description of claim 7 is characterized in that by being passed through into the heat exchanger of the semicoke condenser After pyrolysis gas is exchanged heat, the pyrolysis gas of heating is set to be sent into the bottom of the uplink heat storage type pyrolysis stove as lift gas, and The coal dust of the uplink heat storage type pyrolysis furnace bottom is fed through to the inside of the uplink heat storage type pyrolysis stove.
CN201711166196.1A 2017-11-21 2017-11-21 A kind of uplink heat accumulating type fine coal fast pyrogenation reaction system and method Pending CN107903924A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019210755A1 (en) * 2018-05-03 2019-11-07 大连爱为能源有限公司 Process for solid heat carrier cyclic dry distillation of high ash oil slurry

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019210755A1 (en) * 2018-05-03 2019-11-07 大连爱为能源有限公司 Process for solid heat carrier cyclic dry distillation of high ash oil slurry

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