CN108504370A - Coke furnace carbonization chamber smoke treatment system based on the recycling of coal gas sub-prime - Google Patents
Coke furnace carbonization chamber smoke treatment system based on the recycling of coal gas sub-prime Download PDFInfo
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- CN108504370A CN108504370A CN201810556111.9A CN201810556111A CN108504370A CN 108504370 A CN108504370 A CN 108504370A CN 201810556111 A CN201810556111 A CN 201810556111A CN 108504370 A CN108504370 A CN 108504370A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B43/00—Preventing or removing incrustations
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The invention discloses a kind of coke furnace carbonization chamber smoke treatment systems based on the recycling of coal gas sub-prime, belong to coking industry technical field of energy saving and environmental protection.It includes that the pusher side coke-stove gas recovery system for being used to recycle the raw coke oven gas that coking coal is generated in coking mid-term in coke furnace carbonization chamber pusher side is arranged, it further includes being located at coke furnace carbonization chamber coke side to be used to recycle the coal-charging smoke that the when of coalingging generates, and coking coal is in the coke side coal-charging smoke recovery system at coking initial stage and the raw coke oven gas of coking latter stage generation, coke side coal-charging smoke recovery system includes water-sealed valve, the coal-charging smoke combustion chamber being connected with water-sealed valve one end and the coke side gas collecting tube for conveying flue gas to coke oven combustion chamber, it is additionally provided with automatic ignitor in coal-charging smoke combustion chamber and keeps the combustion chamber diffusion mouth communicated with ambient atmosphere.The system of the present invention can realize the recycling to waste heat in the process of coalingging and process of coking and reduce the incidence of accident simultaneously.
Description
Technical field
The present invention relates to the recycling of coke oven coaling flue dust and coke-oven gas, belong to coking industry energy conservation and environmental protection technology neck
Domain, more particularly to a kind of coke furnace carbonization chamber smoke treatment system based on the recycling of coal gas sub-prime.
Background technology
The current top generally used is coaling in chamber type coking process, is almost observed at once due to charcoal when carbonization chamber is coaling
Coal gas is precipitated strongly caused by changing room furnace wall high temperature.At initial two hours, the heat of furnace wall expenditure was than the heat from heating quirk income
It wants height-temperature of furnace wall to decline, causes coal to decompose and slow down with gas speed of separating out.Temperature of furnace wall balances later, decomposes close to solid
Constant speed degree carries out.In 450~500 DEG C of temperature, after charge of coke center line generates tar seam, observe that enhancing is precipitated in coal gas, until
Reach maximum when 800~900 DEG C of temperature.
Wang Gongduo is studies have shown that the gas volume generated in the process of coalingging is about 7 times of coal resource during coking.Dress
The gas volume generated when coal is：3600m3/ h (the coal resources of coal per ton：320~340m3/ t coals；Coking time：Width is
The carbonization chamber coking time of 450mm takes 18h；Per the coal capacity of hole carbonization chamber：28.9t), the raw coke oven gas that process of coalingging generates is average
Calorific value is 22990kJ, and lower than coke-stove gas calorific value (coke-stove gas calorific value is generally 17~19GJ/Nm3).Gas and steam are in coal
Just start to occur when entering carbonization chamber, the flue gas emerged by hole of coalingging mainly is made of water vapour, tar object and coal dust.Most
First moisture is evaporated from the wet coal close to furnace wall.The evaporation of moisture terminates at 105~110 DEG C.
Coaling generation flue dust come from the following aspects：
1, the coal charge for being packed into carbonization chamber converts out a large amount of air, and oxygen when shove charge starts in air also and enters the duff of stove
Grain burning generates carbon black, forms black smoke.
2, furnace coal contacts with high temperature furnace wall, heats up, and generates a large amount of water vapours and raw coke oven gas.
3, the fine breeze raised simultaneously with above-mentioned water vapour and raw coke oven gas, and the duff taken out of when latter stage of coalingging flat coal
Powder.
4, the coal gas sprayed because furnace roof space instantaneously blocks.
These flue dust are distributed by hole of coalingging, tedge lid peace coal hole etc. to air.
Per stove coaling operation it is usually 2~3 minutes, above-mentioned 1 and 2 smolder about 1~1.5 minute time.Factually survey (to charcoal
Change room effective area 117m2, using belt measured value when rising pipe inspection) and the fume amount 1.2Nm that generates when coalingging3/ divide m2。
It coalings initial stage wet gas moisture content 40~50%, therefore dry fume amount about 0.6Nm3/ divide m2.The value is because of temperature of furnace wall, speed of coalingging
Degree, coal the factors such as property and change.Latter stage coal gas calorific value coaling up to 3000-3500kCal/Nm3.Powder in coal-charging smoke
The about 200 g ton coal of emission (according to the assembly average of one factory of West Germany) of dirt, the data then bigger that some data provide.
When collecting main pressure is excessively high, charing chamber pressure is also relatively high.Though the calorific value of gas obtained in this case
It is higher-because it will not by from chamber system exhaust gas or external air dilution-but coal gas yield it is relatively low because having one
Part coal gas string is leaked to chamber system or is escaped to outside stove by imprecise fire door.
When collecting main pressure is too low, indoor pressure is carbonized, especially in coking latter stage, will be lower than chamber system
Pressure, coal gas will dilute by the exhaust gas from chamber system.And air enters carbonization chamber then and can cause to reduce coal gas
Quality and damage furnace wall chemical reaction.
In order not to allow carbonization chamber to form negative pressure, collecting main pressure should be that hydrostatic pressure adds 5Pa again.For example, gas collecting tube is extremely
The distance at carbonization chamber bottom is 11m, then the pressure of gas collecting tube should be equal to (11 ╳ 10)+5=115Pa.
The pressure rise of coke oven gas collecting tube raw coke oven gas is excessive in order to prevent, such as when the real so shutdown of gas-blowing engine, burnt gas
Coal gas diffusion pipe is installed on pipe.Manual turnover panel or the self-acting hydraulic valve with adjustable Opening pressure are housed, generally on desorption tube
The Opening pressure of diffusion valve is 200 or 250Pa.
For single carbonization chamber, the initial stage of coking process after coalingging, since the combination of size fire door and firedoor frame misses
Unavoidably there is certain gap in difference, and the carbonization chamber of manufacturing technique requirent at this time will keep positive pressure, thus cause part waste
Coal gas is overflowed by these gaps, pollutes environment；After coking time 1~2 hour, the raw coke oven gas that these gaps are spilled off is taken
The tar of band and the coal charge for being softened rear plasticity shape block, and raw coke oven gas spilling is just controlled.
If increasing gas fan suction, charing chamber pressure is reduced, gas quality is not only influenced, can also increase the power of wind turbine
Consumption, while can also increase the operating load of follow-up gas cleaning system, cause gas cleaning system investment to increase, purification cost
Increase.
To sum up, the technical issues of need to solving, is as follows：
(1) modern coke making process and equipment determine that the recovery system of coke-stove gas must be chronically at serviceable condition,
It can guarantee 100% recycling of coke-stove gas.But invested and gas characteristic (inflammable and explosive, if two sets spare, no that set needs
Have inert gas shielding, stand-by cost too high for a long time) restriction, when modern coking technological design and engineering construction, do not examine generally
Consider and build spare gas recovery system, so in modern coking production, it is difficult to overcome diffusing for coal oven dithio-gas, and thus
The pollution that environment is brought.Also determine raw coke oven gas when existing coking raw coke oven gas recovery system can not overcome accident condition simultaneously
Loss and environmental pollution problem are diffused, to the accident emergency measure wretched insufficiency of coke oven production；
(2) in coking coal process of coking, in different coking periods, composition and property differs greatly the raw coke oven gas of generation, existing
Some coking raw coke oven gas recovery systems cannot identify the property of raw coke oven gas, cannot be directed to different times raw coke oven gas of different nature into
Row sub-prime recycles.Coking initial stage after especially coalingging, carbon monoxide and methane are the main composition of this stage raw coke oven gas, most worthy
Aromatic hydrocarbon almost without.Superfine pulverized coal and moisture are also relatively high simultaneously, and raw coke oven gas at this time enters recovery system
Afterwards, dust, aqueous vapor entrained by etc. are all collected and enter follow-up gas cleaning system, follow-up related unit is caused to block,
And the quality of follow-up Related product is seriously affected, increase subsequent wastewater treatment cost；
(3) it is limited by coking production technology, carbonization chamber requires to keep direct draught operation, existing coking raw coke oven gas recycling
System cannot prevent coking initial stage, and carbonization chamber size fire door and furnace roof charging hole lid etc. raw coke oven gas overflow pollution environmental phenomenon.
Invention content
It coalings and technical problem present in process of coking for solution is above-mentioned, can recycle and coaling the invention discloses one kind
Flue dust, and the coke furnace carbonization chamber smoke treatment system of coking coal raw coke oven gas recycled based on coal gas sub-prime can be recycled.
To achieve the above object, the invention discloses a kind of coke furnace carbonization chamber smoke and dust treatment systems based on the recycling of coal gas sub-prime
System, including the pusher side coke-stove gas for being used to recycle the raw coke oven gas that coking coal is generated in coking mid-term in coke furnace carbonization chamber pusher side is set
Recovery system, it further includes being located at coke furnace carbonization chamber coke side tying for recycling coal-charging smoke that the when of coalingging generates and coking coal
The coke side coal-charging smoke recovery system for the raw coke oven gas that burnt initial stage and coking latter stage generate, the coke side coal-charging smoke recovery system packet
Include water-sealed valve, the coal-charging smoke combustion chamber being connected with described water-sealed valve one end and the coke side for conveying flue gas to coke oven combustion chamber
Gas collecting tube is additionally provided with automatic ignitor in the coal-charging smoke combustion chamber and keeps the combustion chamber communicated to diffuse with ambient atmosphere
Mouthful.
Further, the coke side coal-charging smoke recovery system is additionally operable to break down in pusher side coke-stove gas recovery system
Or in coke furnace carbonization chamber pressure exceed coking operation ability when recycle raw coke oven gas, raw coke oven gas is sent into coke oven combustion chamber to reduce
The incidence of accident.
Still further, the water-sealed valve is U-shaped pipe, it is equipped with level control valve in U-shaped pipe and is used for dredging pipe
The dredge valve that road inner valve blocks, meanwhile, be additionally provided in U-shaped pipe water-sealed valve water inlet pipe, water injection valve, water-sealed valve return duct and
Water-sealed valve overflow pipe, wherein can realize that block coke furnace carbonization chamber is with the recycling of coke side coke-stove gas when filling up water in U-shaped pipe
Gas passage between system, by adjusting level control valve come adjust water level in U-shaped pipe can be used for control coke furnace carbonization chamber with
How much is gas flux between coke side coke-stove gas recovery system, to realize air pressure in control coke furnace carbonization chamber, avoids as possible
There is the phenomenon that smoldering, burning with anger in coke oven.
Still further, temperature≤300 DEG C of the water-sealed valve control coal-charging smoke or raw coke oven gas, elute down through water-sealed valve
Part dust enter in the sedimentation basin that is connected with water-sealed valve.
Still further, in coking initial stage and coking latter stage, the water-sealed valve controls the coke furnace carbonization chamber internal pressure
For -3~3Pa.
Still further, the coking initial stage is coke furnace carbonization chamber coaling after coking coal start 2~2.5h of coking,
The coking latter stage is that coking coal terminates the 1h before coking.
Still further, every 2~3 coke furnace carbonization chambers of every coke oven share a coal-charging smoke combustion chamber, it is each to fill
The gas outlet of coal smoke dirt combustion chamber is all connected with coke side gas collecting tube.
Still further, the pipeline that the coal-charging smoke combustion chamber is connect with coke side gas collecting tube is automatically adjusted equipped with coke side
Valve.
Still further, be additionally provided on the gas piping that coke side gas collecting tube is connect with coke oven combustion chamber temperature controller and
Heat-resisting exhaust fan, the temperature controller control enter flue-gas temperature≤300 DEG C in coke oven combustion room.
In general, the generation of waste coke-stove gas can be divided into two stages：
--- coal component is decomposed when reaching about 500 DEG C generates initial product；
--- initial product pyrolysis generates final product.
Fugitive constituent starts to be precipitated and texture of coal starts to destroy, this is related with its degree of coalification.Coal blending starts the temperature decomposed
Degree is about in 300 DEG C of temperature.
Gas and steam have just started to occur when carbonization chamber is coaling, and the flue gas emerged by hole of coalingging mainly is steamed by water
Vapour, tar object and coal dust composition.At first moisture is evaporated from the wet coal close to furnace wall.The evaporation of moisture is tied at 105~110 DEG C
Beam.
In 100~200 DEG C of ranges of temperature, the gas of storage is separated from coal, is mainly made of methane, carbon dioxide and nitrogen,
Water is the primary product in this stage, but is difficult to determine when that termination separates absorption water, initially forms pyrolysis water.
When temperature is higher than 200 DEG C, in addition to being pyrolyzed water, starts to generate decomposition product, be that oxycompound (is first with humic acid
It is main) it is decomposed, carbon monoxide and carbon dioxide is precipitated, and be changed into higher phenols.This process generally 205~350 DEG C it
Between complete (to coking coal about at 400 DEG C), separate 5~10% gas (being determined by the property of as-fired coal).When the temperature rises, coal
Continue to decompose, process of coking is mainly that a tar separates most periods (plastic stage) into a product, this period exists
500~550 DEG C of end of temperature, coal initially form semicoke by mecystasis.40~50% coke-stove gas are generated during this period,
Ingredient is characterized by methane content high (≤60%) and hydrogen content low (≤20%).
Coal equably separates the coal gas containing hydrogen-rich, the volume of hydrogen reaches 45% at this time from when being heated to 800 DEG C for 500 DEG C.One
Secondary tar is decomposed, and generates relatively low saturation and unsaturated hydrocarbon, such as ethane, ethylene and acetylene.Insatiable hunger
It is closed with hydrocarbon, generates hexagonal ring, aromatic hydrocarbon is generated by dehydrogenation, such as benzene, toluene and dimethylbenzene.
700~800 DEG C of temperature are optimum temperature ranges for the aromatic hydrocarbon for generating most worthy.
When temperature is higher than 700 DEG C, start to generate polycyclic aromatic hydrocarbon (naphthalene, anthracene), quantity increase with temperature and
Increase, hydrogen quantity also increases.Oxygenatedchemicals continues to be decomposed, and generates rudimentary phenol by higher phenols, rudimentary phenol further decomposes
For carbon monoxide and carbon dioxide and rudimentary hydrocarbon.Oxycompound can also form a large amount of water.Ammonia starts to decompose into member
Element, nitrogen close with carbon and hydrogenation and form hydrogen cyanide, and sulfur-containing compound mainly generates hydrogen sulfide.
Temperature is characterized in when being higher than 800 DEG C：Polycyclic aromatic hydrocarbon (naphthalene, anthracene) increases and graphite starts to generate；Most
Rudimentary hydrocarbon starts gradually to resolve into element.Ethylene forms acetylene, hydrogen and methane within the scope of 800~900 DEG C, and high
Methane is decomposed into carbon and hydrogen when 1000 DEG C.
To sum up, the mesh of the classification recycling of the raw coke oven gas when system that the present invention designs can be realized to coal-charging smoke, coking
's.
In addition, the pusher side coke-stove gas recovery system of the present invention is existing raw coke oven gas recovery system.
The present invention carries out off-gas recovery using the above-mentioned coke furnace carbonization chamber smoke treatment system based on the recycling of coal gas sub-prime
Method is as follows：
1) when coalingging to coke furnace carbonization chamber, the level control valve of water-sealed valve is made to be shown in a fully open operation, and open water-sealed valve
The ash-laden gas coal-charging smoke of water injection valve, generation of coalingging flows through the isolated dust of water-sealed valve and flue gas, and the dust is with water seal
The water flow inside of valve, which enters in the sedimentation basin being connected with water-sealed valve return duct, obtains coal dust solid, and the flue gas enters cigarette of coalingging
In dirt combustion chamber；Automatic ignition burns to consumption when automatic ignitor in the coal-charging smoke combustion chamber contains oxygen in flue gas
Oxygen to the greatest extent, obtains residual gas；After to be combusted, coke side automatic regulating valve is opened, and residual gas enters in coke side gas collecting tube,
And it controls into flue-gas temperature≤300 DEG C of coke oven combustion chamber until end of coalingging.
2) start coking to 2~2.5h of coking in coke furnace carbonization chamber 1, repeat aforesaid operations；Meanwhile to avoid coke oven charcoal
Change chamber interior pressure it is too big there is phenomenon of smoldering or burn with anger, by adjusting the level control valve of water-sealed valve, water is adjusted with this
Water accumulation level inside envelope valve is to ensure the pressure inside coke furnace carbonization chamber for -3~3Pa.
3) in the mid-term of coke furnace carbonization chamber coking, coke side automatic regulating valve is closed, the water injection valve opened on water-sealed valve makes water
The U-tube inner filling water for sealing valve, blocks coke side gas passage；The regulating valve on ammonia water pipe is opened, is sprayed to elbow with bridge tube
Enter cyclic ammonia water cooling raw coke oven gas, opening pusher side manual modulation valve and pusher side automatic regulating valve makes pusher side gas collecting tube and pusher side air-breathing
Pipe keeps internal and communicates, the pusher side exhaust fan being arranged on unlatching pusher side air intake duct, waste coal after cooling in the pusher side gas collecting tube
Gas is extracted into gas cleaning system, this process continues up to coking cycles and terminates pervious 1h.
4) terminate the pervious 1h of coking, the operation to repeat the above steps 1) in coke furnace carbonization chamber 1.
The advantageous effect of the coke furnace carbonization chamber smoke treatment system based on the recycling of coal gas sub-prime of the present invention is mainly reflected in
Following aspects：
(1) system that designs of the present invention can carry out classification recycling to dust of coalingging, and will be coaling dust using water-sealed valve
In dusting solid separation, on the one hand avoid and detach difficult problem caused by being mixed with tar, on the other hand improve cigarette
The quality of gas；
(2) moisture in coking coal is pumped into coke side gas collection by the system that the present invention designs at coking initial stage and coking later stage
Pipe, finally enters coke oven combustion chamber with raw coke oven gas, on the one hand takes full advantage of the waste heat in raw coke oven gas, on the other hand avoid water
Divide and enter gas cleaning system with raw coke oven gas, reduces wastewater treatment difficulty and cost；Meanwhile the famine generated in carbonization chamber
Dust fractions in coal gas are washed by water-sealed valve, have been partially fed in coke oven combustion chamber, as supplement fuel, reduce entrance
Coal dust amount in tar reduces the probability of internal system line clogging while improving quality of coke tar；
(3) system that the present invention designs can avoid diffusing for coal oven dithio-gas and cause when carbonization chamber burst accident occurs
Environmental pollution；
(4) system that the present invention designs is micro-positive pressure by adjusting the controllable charing chamber internal pressure of water level in water-sealed valve,
Reduce the probability that occurs smoldering inside carbonization chamber or burn with anger；
(5) system that the present invention designs falls mixed oxygen by combustion chambers burn, can reduce the incidence of explosion accident.
Description of the drawings
Fig. 1 is the structural schematic diagram of present system；
The label of each component is as follows in Fig. 1：
Coke furnace carbonization chamber 1 is (wherein：It coalings hole 1.1)；
Coke side coal-charging smoke recovery system 2 is (wherein：Coke side tedge 2.1 is (wherein：Coke side tedge lid 2.11), water seal
Valve 2.2 is (wherein：Water-sealed valve water inlet pipe 2.21, water injection valve 2.22, level control valve 2.23, water-sealed valve return duct 2.24, water-sealed valve
Overflow pipe 2.25, dredge valve 2.26), coal-charging smoke combustion chamber 2.3 (wherein：Automatic ignitor 2.31, combustion chamber diffusion mouth
2.32, diffusion mouth flap valve 2.33), coke side gas collecting tube 2.4, coke side automatic regulating valve 2.5)；
Pusher side coke-stove gas recovery system 3 is (wherein：Pusher side tedge 3.1, pusher side tedge lid 3.11, elbow and bridge tube
3.2, π types pipe 3.3, pusher side manual modulation valve 3.4, pusher side automatic regulating valve 3.5, pusher side gas collecting tube 3.6, pusher side air intake duct 3.7,
Ammonia water pipe 3.8, tar box 3.9).
Specific implementation mode
Each coke oven of the present invention includes several coke furnace carbonization chambers and coke oven combustion chamber, the coke furnace carbonization chamber and coke oven
Combustion chamber is interspersed, and ensures that there are one coke oven combustion chambers per setting between two adjacent coke furnace carbonization chambers；And each coke oven
One coke side coal-charging smoke recovery system and a pusher side coke-stove gas recovery system are set on carbonization chamber.
As shown in Figure 1, present embodiment discloses a kind of coke furnace carbonization chamber smoke treatment system based on the recycling of coal gas sub-prime,
It includes coke furnace carbonization chamber 1, is separately positioned on the coke side coal-charging smoke recovery system 2 of 1 coke side of coke furnace carbonization chamber and the machine of pusher side
Side coke-stove gas recovery system 3, the top of the coke furnace carbonization chamber 1 offer several and are refined for being added to coke furnace carbonization chamber 1
The hole 1.1 of coalingging of coking coal, the coke side coal-charging smoke recovery system 2 include keeping the internal coke side communicated with coke furnace carbonization chamber 1
Tedge 2.1 (coke side tedge lid 2.11 is additionally provided on the coke side tedge 2.1), water-sealed valve 2.2, coal-charging smoke combustion chamber
2.3 and for coke oven combustion chamber convey flue gas coke side gas collecting tube 2.4；The water-sealed valve 2.2 is U-shaped pipe, the U-shaped pipe
One end connection coke side tedge 2.1, the other end connection coal-charging smoke combustion chamber 2.3 of the U-shaped pipe, the coal-charging smoke combustion
Burn room 2.3 keeps internal pipeline to communicate by the water-sealed valve 2.2 with coke side tedge 2.1, the coal-charging smoke combustion chamber 2.3
Coke side gas collecting tube 2.4 is connected, every 2~3 coke furnace carbonization chambers 1 that the present invention designs every coke oven share a coal-charging smoke burning
The water-sealed valve that 2~3 air inlets are separately connected each coke furnace carbonization chamber 1 is arranged in 2.3 lower part of coal-charging smoke combustion chamber in room 2.3
2.2, flue dust outlet is also set up on coal-charging smoke combustion chamber 2.3 for connecting coke side gas collecting tube 2.4, the flue dust outlet and coke
Coke side automatic regulating valve 2.5 is equipped between side gas collecting tube 2.4；Meanwhile the coal-charging smoke combustion chamber 2.3 is internally provided with automatic point
Firearm 2.31, the top setting combuster diffusion mouth 2.32 of coal-charging smoke combustion chamber 2.3, on the combustion chamber diffusion mouth 2.32
It is provided with automatic turning plate valve 2.33；Temperature control is equipped on the gas piping that coke side gas collecting tube 2.4 is connected with coke oven combustion chamber
Device processed and heat-resisting exhaust fan, the temperature controller control enter flue-gas temperature≤300 in coke oven combustion room, the temperature control
Device processed is preferably heat exchanger or mist cooling formula equipment.
Fig. 1 is recombined it is found that the pipeline of the water-sealed valve 2.2 is U-shaped pipe, is provided with water seal in the U-shaped pipe
Valve water inlet pipe 2.21, water-sealed valve overflow pipe 2.25 and water-sealed valve return duct 2.24 are provided on the water-sealed valve water inlet pipe 2.21
Water injection valve 2.22, the U-tube are internally provided with level control valve 2.23, and the bottom lower end of the U-tube, which is provided with, to be used for
The dredge valve 2.26 of high pressure water or high steam is sprayed into, the end of the water-sealed valve return duct 2.24 connects sedimentation basin；When coalingging
When coal-charging smoke when flowing through water-sealed valve 2.2,2.2 one side of the water-sealed valve cools down to coal-charging smoke, another aspect washing portion
The level control valve 2.23 through water-sealed valve 2.2 enters water-sealed valve and flows back after dividing flue dust, the dust under washing to be washed by flow
In pipe 2.24, and enter in the sedimentation basin being connected with water-sealed valve return duct 2.24 with in-pipe flow, obtains coal dust solid, the coal
Powder solid can be re-used as the coking coal of coke oven after realizing dehydration；The suction of flue gas after cooling in the heat-resisting exhaust fan of coke side
Effect is lower to be entered in combustion chamber 2.3；Into the flue gas in combustion chamber 2.3 when containing oxygen, automatic ignitor 2.31 is beaten automatically
Fire obtains residual gas to oxygen depleted, which, which enters in coke side gas collecting tube 2.4 and be admitted in coke oven combustion chamber, makees
It is supplemented for the coal gas of coking.
In addition, if the valve inside water-sealed valve 2.2 is blocked by dusting solid, opens dredge valve 2.26 and spray into high pressure water or height
The purpose of deposit dredging valve in purge valve can be realized in pressure steam, and the dust under flow and washing is set along water-sealed valve 2.2
The water-sealed valve return duct 2.24 set enters in the sedimentation basin being connected with water-sealed valve 2.2.
At the same time, the pusher side coke-stove gas recovery system 3 is existing raw coke oven gas recovery system, it is used to refine in coke oven
The raw coke oven gas that burnt process extraction coke furnace carbonization chamber generates, as shown in Figure 1, it includes (the pusher side tedge of pusher side tedge 3.1
Pusher side tedge lid 3.11 is additionally provided on 3.1), elbow and bridge tube 3.2, π types pipe 3.3, pusher side manual modulation valve 3.4, pusher side from
Dynamic regulating valve 3.5, pusher side gas collecting tube 3.6, pusher side air intake duct 3.7, ammonia water pipe 3.8 and tar box 3.9, wherein the pusher side collection
Tracheae 3.6 also connects pusher side air intake duct 3.7 by π types pipe 3.3, and the pusher side air intake duct 3.7 connects gas cleaning system, described
Pusher side manual modulation valve 3.4 and pusher side automatic regulating valve 3.5, specific pusher side coke-stove gas recycling system are provided on π types pipe 3.3
System absorb raw coke oven gas process be：The ammonium hydroxide sprayed into the raw coke oven gas in elbow and bridge tube 3.2 along ammonia water pipe 3.8, which cools down, to drop
Temperature so that the temperature of raw coke oven gas is reduced to 70~80 DEG C, and the raw coke oven gas after cooling enters pusher side gas collecting tube 3.6, wherein raw coke oven gas
In tar enter in tar box 3.9, the gas in raw coke oven gas along π types pipe 3.3 enter pusher side air intake duct 3.7 after outer row, waste coal
Liquid in gas also enters pusher side air intake duct 3.7 after flowing through tar box 3.9, is handled using subsequent gas cleaning system useless
Water.
In order to preferably realize the function of above-mentioned recycling system, below in conjunction with specific recoverying and utilizing method and specifically
Embodiment be explained.
2 × 6 meters of preferred coke-oven plant of the present embodiment coke oven, 1,100,000 tons/year of coke output, dust collection for charging design maximum quantity of wind 8
Ten thousand m3/ h, in coke-stove gas recovery system, gas volume about 55000Nm3/ h, coking time 18~20 hours.Off-gas recovery unilateral side collection
Tracheae is mounted on pusher side, and coal-charging smoke gathers dust manifold mounted on coke side.
A kind of method that the coke furnace carbonization chamber smoke treatment system based on the recycling of coal gas sub-prime carries out off-gas recovery is as follows：
(1) when coalingging to coke furnace carbonization chamber 1, the level control valve 2.23 of water-sealed valve 2.2 is made to be shown in a fully open operation, and open
The ash-laden gas coal-charging smoke of the water injection valve 2.22 of water-sealed valve 2.2, generation of coalingging flows through 2.2 isolated dust of water-sealed valve and cigarette
Gas, the dust, which enters with the water flow inside of water-sealed valve 2.2 in the sedimentation basin being connected with water-sealed valve return duct 2.24, obtains coal
Powder solid, the flue gas enter in combustion chamber 2.3；Automatic ignitor 2.31 in the combustion chamber 2.3 is in flue gas containing aerobic
Automatic ignition burns to oxygen depleted when gas, obtains residual gas；After to be combusted, coke side automatic regulating valve 2.5 is opened, and is remained
Residual air body enters in coke side gas collecting tube 2.4, and controls into flue-gas temperature≤300 DEG C of coke oven combustion chamber until end of coalingging.
(2) start coking to 2~2.5h of coking in coke furnace carbonization chamber 1, repeat aforesaid operations；Meanwhile to avoid coke oven
Pressure inside carbonization chamber 1 is too big to there is phenomenon of smoldering or burn with anger, by adjusting the level control valve 2.23 of water-sealed valve 2.2, with
This adjusts the water accumulation level inside water-sealed valve 2.2 to ensure pressure inside coke furnace carbonization chamber 1 for -3~3Pa.
(3) in the mid-term of 1 coking of coke furnace carbonization chamber, coke side automatic regulating valve 2.23 is closed, opens the note on water-sealed valve 2.2
Water valve 2.22 makes the U-tube inner filling water of water-sealed valve 2.2, blocks coke side gas passage；Open the adjusting on ammonia water pipe 3.8
Valve sprays into cyclic ammonia water into elbow and bridge tube 3.2 and cools down raw coke oven gas, and opening pusher side manual modulation valve 3.4 and pusher side are adjusted automatically
Section valve 3.5 makes pusher side gas collecting tube 3.6 keep inside to communicate with pusher side air intake duct 3.7, opens the machine being arranged on pusher side air intake duct 3.7
Side exhaust fan, raw coke oven gas after cooling is extracted into gas cleaning system in the pusher side gas collecting tube 3.6, this process is always
It is extended to coking cycles and terminates pervious 1h.
(4) terminate the pervious 1~2.5h of coking in coke furnace carbonization chamber 1, repeat the above steps the operation of (1).
In order to preferably cope with burst accident, in coking mid-term, if pusher side coke-stove gas recovery system 3 breaks down, close
It closes the inner passage of pusher side coke-stove gas recovery system 3, opens the inner passage of coke side coke-stove gas recovery system 2, in repetition
The operation of step (1) is stated, the raw coke oven gas generated in extraction coke furnace carbonization chamber 1 is simultaneously sent into coke oven combustion chamber as supplement fuel.
If the time that pusher side coke-stove gas recovery system 3 breaks down is long, even if the ponding inside water-sealed valve 2.2 is complete
Portion empties, and the raw coke oven gas that coke side heat resisting exhauster can not also generate 1 inside of coke furnace carbonization chamber is completely drawn out so that coke furnace carbonization chamber
Pressure inside 1 exceeds coking operation range, when such as the pressure inside coke furnace carbonization chamber 1 reaches 160Pa, corresponding coke oven charing
The coke side automatic regulating valve 2.5 of room 1 is closed, and diffusion mouth flap valve 2.33, raw coke oven gas burning heel row in combustion chamber 2.3 are opened
Go out, the whole of raw coke oven gas is avoided to diffuse pollution on the environment, greatly improves the atmosphere quality of coking plant area.
Above example is only best citing, rather than a limitation of the embodiments of the present invention.Except above-described embodiment
Outside, the present invention also has other embodiment.All technical solutions formed using equivalent substitution or equivalent transformation, all fall within the present invention
It is required that protection domain.
Claims (9)
1. a kind of coke furnace carbonization chamber smoke treatment system based on the recycling of coal gas sub-prime, including be arranged in coke furnace carbonization chamber (1) machine
Side is used to recycle the pusher side coke-stove gas recovery system (3) for the raw coke oven gas that coking coal is generated in coking mid-term, it is characterised in that：It
Further include be located at coke furnace carbonization chamber (1) coke side for recycle coal-charging smoke that the when of coalingging generates and coking coal coking initial stage with
The coke side coal-charging smoke recovery system (2) for the raw coke oven gas that coking latter stage generates, the coke side coal-charging smoke recovery system (2) include
Water-sealed valve (2.2), the coal-charging smoke combustion chamber (2.3) being connected with the water-sealed valve (2.2) one end and for coke oven combustion chamber
The coke side gas collecting tube (2.4) for conveying flue gas, be additionally provided in the coal-charging smoke combustion chamber (2.3) automatic ignitor (2.31) and with
Ambient atmosphere keeps the combustion chamber diffusion mouth (2.32) communicated.
2. the coke furnace carbonization chamber smoke treatment system according to claim 1 based on the recycling of coal gas sub-prime, it is characterised in that：Institute
Coke side coal-charging smoke recovery system (2) is stated to be additionally operable in pusher side coke-stove gas recovery system (3) failure or coke furnace carbonization chamber
(1) raw coke oven gas is recycled when interior pressure exceeds coking operation ability.
3. the coke furnace carbonization chamber smoke treatment system according to claim 1 or claim 2 based on the recycling of coal gas sub-prime, feature exist
In：The water-sealed valve (2.2) is U-shaped pipe, and level control valve (2.23) is equipped in U-shaped pipe and is used for dredging pipeline internal valve
The dredge valve (2.26) that door blocks.
4. the coke furnace carbonization chamber smoke treatment system according to claim 3 based on the recycling of coal gas sub-prime, it is characterised in that：Institute
State temperature≤300 DEG C of water-sealed valve (2.2) control coal-charging smoke or raw coke oven gas, the part dust under being eluted through water-sealed valve (2.2)
Into in the sedimentation basin being connected with water-sealed valve (2.2).
5. the coke furnace carbonization chamber smoke treatment system according to claim 3 based on the recycling of coal gas sub-prime, it is characterised in that：
Coking initial stage and coking latter stage, it is -3~3Pa that the water-sealed valve (2.2), which controls coke furnace carbonization chamber (1) internal pressure,.
6. special according to claims 1 or 2 or the 4 or 5 coke furnace carbonization chamber smoke treatment systems based on the recycling of coal gas sub-prime
Sign is：The coking initial stage is 2~2.5h that coking coal starts coking after coke furnace carbonization chamber (1) is coaling, the coking
Latter stage is that coking coal terminates the 1h before coking.
7. the coke furnace carbonization chamber smoke treatment system according to claim 1 or claim 2 based on the recycling of coal gas sub-prime, feature exist
In：Every 2~3 coke furnace carbonization chambers (1) of every coke oven share a coal-charging smoke combustion chamber (2.3), each coal-charging smoke combustion
The gas outlet for burning room (2.3) is all connected with coke side gas collecting tube (2.4).
8. the coke furnace carbonization chamber smoke treatment system according to claim 7 based on the recycling of coal gas sub-prime, it is characterised in that：Institute
It states the pipeline that coal-charging smoke combustion chamber (2.3) is connect with coke side gas collecting tube (2.4) and is equipped with coke side automatic regulating valve (2.5).
9. according to claims 1 or 2 or the 4 or 5 or 8 coke furnace carbonization chamber smoke treatment systems based on the recycling of coal gas sub-prime,
It is characterized in that：Temperature controller and resistance to is additionally provided on the gas piping that coke side gas collecting tube (2.4) is connect with coke oven combustion chamber
Hot exhaust fan, the temperature controller control enter flue-gas temperature≤300 DEG C in coke oven combustion room.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109439345A (en) * | 2018-12-26 | 2019-03-08 | 中冶焦耐自动化有限公司 | One drag two positive pressure furnace drying device |
| CN114166877A (en) * | 2021-12-08 | 2022-03-11 | 中国矿业大学 | Method for testing methane adsorption capacity of coal based on XRD microcrystalline structure evolution |
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| JPS60177093A (en) * | 1984-02-23 | 1985-09-11 | Osaka Gas Co Ltd | Coke oven |
| JPS60257824A (en) * | 1984-06-05 | 1985-12-19 | Mitsubishi Heavy Ind Ltd | Denitration of coke oven exhaust gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109439345A (en) * | 2018-12-26 | 2019-03-08 | 中冶焦耐自动化有限公司 | One drag two positive pressure furnace drying device |
| CN109439345B (en) * | 2018-12-26 | 2024-05-14 | 中冶焦耐自动化有限公司 | One-driving-two positive pressure baking oven device |
| CN114166877A (en) * | 2021-12-08 | 2022-03-11 | 中国矿业大学 | Method for testing methane adsorption capacity of coal based on XRD microcrystalline structure evolution |
| CN114166877B (en) * | 2021-12-08 | 2023-08-18 | 中国矿业大学 | XRD microcrystalline structure evolution-based coal methane adsorption capability test method |
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| CN108504370B (en) | 2020-04-07 |
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