CN108728135A - Coke-stove gas sub-prime recoverying and utilizing method - Google Patents
Coke-stove gas sub-prime recoverying and utilizing method Download PDFInfo
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- CN108728135A CN108728135A CN201810552580.3A CN201810552580A CN108728135A CN 108728135 A CN108728135 A CN 108728135A CN 201810552580 A CN201810552580 A CN 201810552580A CN 108728135 A CN108728135 A CN 108728135A
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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
- C10B49/00—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated
- C10B49/02—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated with hot gases or vapours, e.g. hot gases obtained by partial combustion of the charge
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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
- C10B27/00—Arrangements for withdrawal of the distillation gases
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Abstract
The invention discloses a kind of coke-stove gas sub-prime recoverying and utilizing methods, belong to coking industry technical field of energy saving and environmental protection.The raw coke oven gas that coke furnace carbonization chamber generates at coking initial stage and coking latter stage is recycled in coke furnace carbonization chamber coke side setting coke side coke-stove gas recovery system and is sent into fuel of the coke oven combustion chamber as coke oven heating, in coking mid-term, the raw coke oven gas generated in the pusher side coke-stove gas recovery system recycling coke furnace carbonization chamber of coke furnace carbonization chamber pusher side setting, simultaneously, in coking mid-term, if pressure exceeds coking operation ability in the failure of pusher side coke-stove gas recovery system or coke furnace carbonization chamber, using the raw coke oven gas generated in coke side coke-stove gas recovery system recycling coke furnace carbonization chamber and send to coke oven combustion chamber.When the coke-stove gas sub-prime recoverying and utilizing method of the present invention thoroughly solves raw coke oven gas recovery system generation burst accident, raw coke oven gas diffuses the problem of losing seriously and polluting environment.
Description
Technical field
The present invention relates to the recycling of coke-oven gas, belong to coking industry technical field of energy saving and environmental protection, more particularly to one
Kind coke-stove gas sub-prime recoverying and utilizing method.
Background technology
It is the recycling process of the typical energy reprocessing and thermal energy, coke and refining in coke-oven plant's coking produce reality
Coke gas is its main energy products.In coke production, mixed coal is isolated air in coke oven and heats destructive distillation, generates
A large amount of raw coke oven gas is generated while coke.
Raw coke oven gas converges at the top of carbonization chamber under the draft effect of gas fan, flows through tedge, elbow and bridge tube
Afterwards, the ammonium hydroxide cooling being injected into enters follow-up gas cleaning system.
For single carbonization chamber, the generation of waste coke-stove gas can be divided into two stages：
First, coal component is decomposed when reaching about 500 DEG C generates initial product；
Secondly, initial product pyrolysis generates final product.
Marian Zielinski etc. thinks that fugitive constituent starts to be precipitated and texture of coal starts to destroy, this is related with its degree of coalification, refining
The temperature that coking coal starts to decompose is generally at 300 DEG C or so.Strictly speaking, gas and steam have just started when carbonization chamber is coaling
Existing, the flue gas emerged by hole of coalingging mainly is made of water vapour, tar object and coal dust.It is steamed at first from the wet coal close to furnace wall
Moisture is sent out, the evaporation of moisture terminates at 105~110 DEG C.
In 100~200 DEG C of ranges of temperature, the gas volatilized 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), be precipitated 5~10% gas (being determined by the property of as-fired coal).
When the temperature rises, coal substance continues to decompose, and process of coking enters a product (a mainly tar) and separates
Most periods (plastic stage), this period initially form semicoke in 500~550 DEG C of end of temperature, coal by mecystasis.?
40~50% coke-stove gas are generated during this, ingredient is spy with methane content high (≤60%) and hydrogen content low (≤20%)
Sign.
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, and the aromatic hydrocarbon of generation is the compound for having side chain first, starts to decompose and reduce, contains
Oxygen compound continues to be decomposed, and generates rudimentary phenol by higher phenols, rudimentary phenol is further broken into carbon monoxide and carbon dioxide
And rudimentary hydrocarbon.A large amount of water are also generated from oxycompound.Ammonia starts to decompose into element；Nitrogen closes with carbon and hydrogenation and forms cyanogen
Change hydrogen.Hydrogen sulfide is mainly generated from sulfur-containing compound.
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.
Gas and vapour mixture become coal oven dithio-gas by secondary change in carbonization chamber and furnace roof space, number
Amount and composition change with the passage of coking time.
In conclusion process of coking can be divided into three phases：
It plays the time before ductile bed converges (60% coking time), generates about from carbonization chamber and gas collecting tube connection first
60% raw coke oven gas, 80~90% heavy hydrocarbons, 70% methane and 55% hydrogen；
Secondly it converges to coal gas from ductile bed and is precipitated and disappear (25% coking time), continue to generate 30% coal gas, wherein most
More is hydrogen, and the methane whole rate of recovery increases to about 97% at the end of this stage, and the generation of weight hydrocarbon is few or complete
Terminate entirely；
It finally arrives gas collecting tube and cuts off (15% coking time) with carbonization chamber, also generate about 12% hydrogen and 3% methane.
Almost observe that the coal gas caused by coking chamber wall high temperature is precipitated strongly at once when carbonization chamber is coaling.Most
First two hours, the heat of furnace wall expenditure was higher than from the heat for heating quirk income, and temperature of furnace wall declines, and causes coal to decompose and is analysed with gas
Go out speed to slow down.Temperature of furnace wall balances later, and decomposition is close to be carried out with fixed speed.In 450~500 DEG C of temperature, in charge of coke
It after heart line generates tar seam, observes that enhancing is precipitated in coal gas, reaches maximum when 800~900 DEG C of temperature.
The examination waste coke-stove gas combustion heat is found when generating variation in process of coking, when coal is in different heating fire path temperature
When lower coking, gas-fired heat is different.The combustion heat is high within several leading a hour, this is because temperature of furnace wall is relatively low, is contained by methane
Weight hydrocarbon degree of decomposition caused by amount is big is little.Temperature of furnace wall is higher, and the decomposition of heats of combustion coal gas is bigger.With modeling
Property layer to mobile in the middle part of coal charge, the reaction compartment extended residence time between ductile bed and furnace wall, the combustion heat accordingly reduces.
After tar seam is formed, the combustion heat of coal gas starts to improve again, this is firstly because methane and benzene content in coal gas and increases
Caused by big.After reaching maximum value, since high combustion components continue to lose again, the reduction of the raw coke oven gas combustion heat is considerably more intense, but hydrogen
Content and carbon monoxide content increase.It is closed there is also corresponding in coking overall process between hydrogen and methane content in raw coke oven gas
System.
Raw coke oven gas density changes with the propulsion of process of coking relative to weight hydrocarbon and methane content, after coking
Phase substantially reduces since nitrogen content increases.
It follows that as-fired coal, in different coking times, the composition etc. of raw coke oven gas is different；In other words, waste coal
The property of gas changes with coking time.
Yang Dongwei etc. has studied the temperature changing regularity of raw coke oven gas, and in a coking cycles, raw gas temperature first increases
After reduce, and raw coke oven gas flow is reduced with the progress of coking process.Meanwhile Marian Zielinski etc. is thought in temperature 100~200
DEG C range, the gas volatilized from coal are mainly made of methane, carbon dioxide and nitrogen, and water is the primary product in this stage.Institute
It is different with the temperature and its composition and property in different coking periods, raw coke oven gas, to these coal gas according to its dissimilarity
Matter carries out classification recycling, will also generate different effects.
However there are the following problems for the existing recycling to raw coke oven gas in coke oven coke oven uprising tube：
1, raw coke oven gas is directly drawn into gas cleaning system by existing coke-stove gas recovery system, cannot be preferably real
Now to the recycling of raw coke oven gas waste heat；
2, the moisture in raw coke oven gas is directly entered gas purification system by existing coke-stove gas recovery system with coal gas
System, the final form of expression are residual coking ammonia water, increase subsequent processing difficulty and cost；
3, existing coke-stove gas recovery process needs to ensure that carbonization chamber is micro-positive pressure, and coking initial stage coke oven is caused to emit
Cigarette, the phenomenon that burning with anger, seriously pollute environment；
4, when existing coke oven corollary system can not effectively, thoroughly solve raw coke oven gas recovery system generation burst accident,
The problem of raw coke oven gas diffuses loss seriously and pollutes environment.
Invention content
In order to solve the above technical problems, the invention discloses it is a kind of not only can high efficiente callback utilize coke oven raw coke oven gas, and
And more environmentally-friendly coke-stove gas sub-prime recoverying and utilizing method.
To achieve the above object, the invention discloses a kind of coke-stove gas sub-prime recoverying and utilizing methods, in the coke oven of coke oven
It is carried out in carbonization chamber and coke oven combustion chamber, wherein recycled in coke furnace carbonization chamber coke side setting coke side coke-stove gas recovery system burnt
Oven carbonization chamber is in the raw coke oven gas of coking initial stage and the generation of coking latter stage and is sent into fuel of the coke oven combustion chamber as coke oven heating,
Coking mid-term, the interior waste coal generated of pusher side coke-stove gas recovery system recycling coke furnace carbonization chamber of coke furnace carbonization chamber pusher side setting
Gas.
Further, the coking initial stage is 1~2.5h that coke furnace carbonization chamber installs that coking coal after coal starts coking, this
What stage coke furnace carbonization chamber coking generated includes mainly the gases such as water, methane, carbon dioxide.
Still further, the coking latter stage, which is coking coal, terminates 1~2.5h before coking, this stage coke furnace carbonization chamber
What coking generated includes mainly the gases such as acetylene, hydrogen or methane.
It is coking mid-term after removing coking initial stage, coking latter stage in coking cycle.
Further, in coking initial stage and coking latter stage, it is -3~3Pa to control the coke furnace carbonization chamber internal pressure,
To avoid coke oven the phenomenon that smoldering, burning with anger occur as possible.
Still further, in coking mid-term, if pusher side coke-stove gas recovery system breaks down or coke furnace carbonization chamber internal pressure
Power exceeds coking operation ability, using the raw coke oven gas that generates in coke side coke-stove gas recovery system recycling coke furnace carbonization chamber and send to
Coke oven combustion chamber, to realize that the coke-stove gas sub-prime recoverying and utilizing method of the present invention faces the flexibility of burst accident.
Still further, the coke side coke-stove gas recovery system includes the water seal that one end is used to connect coke side tedge
The other end of valve, the water-sealed valve connects two gas pipings, and a gas piping connection is waste for being conveyed to coke oven combustion chamber
Igniter is diffused in the coke side gas collecting tube of coal gas, another gas piping connection.
Still further, the water-sealed valve is U-shaped pipe, water-sealed valve water inlet pipe, water injection valve, water are equipped in U-shaped pipe
Valve return duct, water-sealed valve overflow pipe and dredge valve are sealed, level control valve is equipped in U-shaped pipe, wherein when being filled out in U-shaped pipe
The gas passage blocked between coke furnace carbonization chamber and coke side coke-stove gas recovery system can be realized when full water, by adjusting water level tune
Section valve is logical to adjust the gas that water level in U-shaped pipe can be used for controlling between coke furnace carbonization chamber and coke side coke-stove gas recovery system
How much is amount, to realize air pressure in control coke furnace carbonization chamber, coke oven is avoided the phenomenon that smoldering, burning with anger occur as possible.
Still further, the gas piping that the water-sealed valve is connected with coke side gas collecting tube is automatically adjusted equipped with coke side
Valve；The water-sealed valve diffuses automatic regulating valve with diffusing gas piping that igniter is connected and be equipped with, described to diffuse igniting
Automatic ignitor is equipped in device.
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 raw gas temperature≤300 DEG C in coke oven combustion room.
Preferably, the temperature controller is heat exchanger or mist cooling formula equipment.Still further, being fired when entering coke oven
When burning indoor raw gas temperature and being more than 300 DEG C, full open level regulating valve, the water injection valve for opening water-sealed valve is sprinkled water to raw coke oven gas and is dropped
Temperature.
The principle of coke-stove gas sub-prime recoverying and utilizing method of the present invention is：
In coking coal coking initial stage and later stage, what is generated in coke furnace carbonization chamber is usually imflammable gas, is different from conventional
This part imflammable gas is pumped into pusher side coke-stove gas recovery system, the present invention is preferably set in the coke side of coke furnace carbonization chamber
Set coke side coke-stove gas recovery system, and the coke side gas collecting tube of the coke side coke-stove gas recovery system leads to coke oven combustion chamber, one
Aspect realizes the recycling of raw coke oven gas, and the moisture on the other hand avoided in raw coke oven gas enters gas purification with raw coke oven gas
System reduces wastewater treatment difficulty and cost；In addition, coke side coke-stove gas recovery system includes U-shaped water-sealed valve, the U-shaped water
Envelope valve can play the role of blocking between coke furnace carbonization chamber and coke side coke-stove gas recovery system gas passage and certain
The temperature of raw coke oven gas in coke oven combustion room is lowered into degree.
The beneficial effects are mainly as follows following aspects：
(1) moisture in coking coal is pumped by the coke-stove gas sub-prime recoverying and utilizing method that the present invention designs at coking initial stage
Coke side gas collecting tube, 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
It avoids moisture and enters gas cleaning system with raw coke oven gas, reduce 60% or more coking wastewater yield, significantly reduce
Cost for wastewater treatment；
(2) the coke-stove gas sub-prime recoverying and utilizing method that the present invention designs is in coking initial stage and coking later stage, carbonization chamber
Dust in the raw coke oven gas of generation has been also fed in coke oven combustion chamber as supplement fuel, is also reduced into the coal in tar
Powder amount reduces the probability of internal system line clogging while improving quality of coke tar；
(3) water-sealed valve in the coke-stove gas sub-prime recoverying and utilizing method that the present invention designs is by adjusting the controllable charcoal processing of water level
Change chamber internal pressure is micro-positive pressure, reduces the probability that occurs smoldering inside carbonization chamber or burn with anger；And automatic ignition device then exists
When carbonization chamber burst accident occurs, avoids the whole of raw coke oven gas from diffusing pollution on the environment, greatly improve coke-oven plant
The atmosphere quality in area；
(4) the coke-stove gas sub-prime recoverying and utilizing method that the present invention designs improves the stability of coke oven production, in pusher side
When coke-stove gas recovery system breaks down, coke-stove gas can in time be recycled by coke side coke-stove gas recovery system,
, then can be by the timely recycling of pusher side when coke side coke-stove gas recovery system breaks down, two systems can be mutually spare.
Description of the drawings
Fig. 1 is the structural schematic diagram of coke-stove gas sub-prime recovery system of the present invention；
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 coke-stove gas 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), coke side automatic regulating valve 2.3, coke side gas collecting tube 2.4, diffuse automatic regulating valve 2.5, diffuse
Igniter 2.6 is (wherein：Automatic ignitor 2.61))；Pusher side coke-stove gas recovery system 3 is (wherein：Pusher side tedge 3.1, machine
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, machine
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 coke-stove gas 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-stove gas sub-prime recycling system, it includes coke furnace carbonization chamber
1, it is separately positioned on the coke side coke-stove gas recovery system 2 and pusher side coke-stove gas recovery system 3 at 1 both ends of coke furnace carbonization chamber,
In, it is coke side coke-stove gas recovery system 2 to be arranged in coke side, and it is pusher side coke-stove gas recovery system 3 to be arranged in pusher side；Institute
The top for stating coke furnace carbonization chamber 1 offers several holes 1.1 of coalingging for adding coking coal to coke furnace carbonization chamber 1, the coke
Side coke-stove gas recovery system 2 includes keeping internal (the coke side rising of coke side tedge 2.1 communicated with coke furnace carbonization chamber 1
It is additionally provided with coke side tedge lid 2.11 on pipe 2.1, can be opened for dispersing gas in burst accident to avoid exploding in coke oven
Body), the water-sealed valve 2.2 that is connected with coke side tedge 2.1, the outlet port of the water-sealed valve 2.2 connects two gas pipings, one
Gas piping connects coke side gas collecting tube 2.4 by coke side automatic regulating valve 2.3, another gas piping be sequentially connected diffuses from
It moves regulating valve 2.5 and diffuses igniter 2.6 (described diffuse is equipped with automatic ignitor 2.61 in igniter 2.6), the coke
Side gas collecting tube 2.4 is also connected with coke oven combustion chamber, is equipped on the gas piping that coke side gas collecting tube 2.4 is connected with coke oven combustion chamber
Temperature controller (heat exchanger or mist cooling formula equipment, preferably indirect type heat exchanger) and the heat-resisting exhaust fan of coke side.
Fig. 1 is recombined it is found that the water-sealed valve 2.2 is U-shaped pipe, equipped with water-sealed valve water inlet pipe in U-shaped pipe
2.21, for the water injection valve 2.22 of the water filling into U-shaped pipe, water-sealed valve return duct 2.24, water-sealed valve overflow pipe 2.25 and dredging
Valve 2.26 is equipped with level control valve 2.23 in U-shaped pipe, opens water injection valve 2.22 and is filled into the U-shaped pipe of water-sealed valve 2.2
Water can block the gas passage between coke side gas collecting tube 2.4 and coke furnace carbonization chamber 1 when filling up U-shaped pipe；When in U-shaped pipe
When the ponding in portion needs to adjust water level to control pressure in coke furnace carbonization chamber 1, can directly adjust level control valve 2.23 can be real
It is existing.In addition, water-sealed valve overflow pipe 2.25 can keep pipeline to communicate with water-sealed valve return duct 2.24, and dredge valve 2.26 is in U-tube
Road can play dredging when being blocked by dust.
At the same time, the pusher side coke-stove gas recovery system 3 is existing raw coke oven gas recovery system, it includes that pusher side rises
Pipe 3.1 (pusher side tedge lid 3.11 is additionally provided on the pusher side tedge 3.1), 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 and tar box
3.9, wherein the pusher side gas collecting tube 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 is connect, is provided with pusher side manual modulation valve 3.4 and pusher side automatic regulating valve 3.5 on the π types pipe 3.3, specifically
Pusher side coke-stove gas recovery system absorb raw coke oven gas process be：Into the raw coke oven gas in elbow and bridge tube 3.2 by along ammonium hydroxide
The ammonium hydroxide that pipe 3.8 sprays into cools 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 the tar in raw coke oven gas enters in tar box 3.9, and the gas in raw coke oven gas enters pusher side along π types pipe 3.3
Outer after air intake duct 3.7 to arrange, the liquid in raw coke oven gas also enters pusher side air intake duct 3.7 after flowing through tar box 3.9, using subsequent
Gas cleaning system handles waste water.It is this it is individual using pusher side coke-stove gas recovery system recycle raw coke oven gas by the way of will produce
A large amount of industrial wastewater not only increases intractability, more increases processing cost.
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.
Wherein, the coke oven of the present embodiment preferably 2 × 6 meters of certain coke-oven plant, in coke-oven gas recovery system, gas volume is about
55000Nm3/ h, coking time 18~20 hours, off-gas recovery unilateral side gas collecting tube are mounted on pusher side.
A kind of method of coke-oven gas sub-prime recycling, it includes the following steps：
1) coking initial stage：The hole 1.1 of coalingging on coke furnace carbonization chamber 1 is closed, starts coking to coking in coke furnace carbonization chamber 1
1~2.5h (the present embodiment is preferably 1h) closes the inner passage of pusher side coke-stove gas recovery system 3, opens coke side coke-oven coal
The inner passage of gas recovery system 2, specific operating process are first to adjust the level control valve 2.23 of water-sealed valve 2.2, emptied of water
The cooling water inside valve 2.2 is sealed, coke side automatic regulating valve 2.3 is then opened and makes to diffuse automatic regulating valve 2.5 in closing shape
State so that coke furnace carbonization chamber 1 keeps inside to communicate with coke side gas collecting tube 2.4, starts the resistance to hot wind of coke side on coke side gas collecting tube 2.4
(frequency control, maximum quantity of wind are 100,000 m to machine3/ h), the raw coke oven gas that extraction coke furnace carbonization chamber 1 inside generates, and using between described
The control of formula heat exchanger is connect into temperature≤300 DEG C of the raw coke oven gas of coke oven combustion chamber, raw coke oven gas enters conduct in coke oven combustion chamber
Fuel is supplemented, the recycling of raw coke oven gas (imflammable gas in raw coke oven gas or coal dust) is on the one hand realized, avoids waste coal
Energy dissipation in gas；And reduce into the coal dust amount in tar, while improving quality of coke tar, reduce internal system
The probability of line clogging, it is thus also avoided that moisture with raw coke oven gas enter gas cleaning system, reduce wastewater treatment difficulty and
Cost；
In addition, to avoid the pressure inside coke furnace carbonization chamber 1 is too big from phenomenon of smoldering or burn with anger occur, by adjusting water-sealed valve
2.2 level control valve 2.23 adjusts the water accumulation level inside water-sealed valve 2.2 to ensure inside coke furnace carbonization chamber 1 with this
Pressure is -3~3Pa.
2) coking mid-term：The inner passage of coke side coke-stove gas recovery system 2 is closed, pusher side coke-stove gas recycling system is opened
The inner passage of system 3, specific operating process are to close coke side automatic regulating valve 2.23, open the water injection valve on water-sealed valve 2.2
2.22 make the U-tube inner filling water of water-sealed valve 2.2, block coke side gas passage；The regulating valve on ammonia water pipe 3.8 is opened, to
Elbow cools down raw coke oven gas, opening pusher side manual modulation valve 3.4 and pusher side automatic regulating valve with cyclic ammonia water is sprayed into bridge tube 3.2
3.5 make pusher side gas collecting tube 3.6 keep inside to communicate with pusher side air intake duct 3.7, open the pusher side being arranged on pusher side air intake duct 3.7 and take out
Wind turbine, raw coke oven gas after cooling is extracted into gas cleaning system in the pusher side gas collecting tube 3.6, this process continues up
Terminate pervious 1~2.5h to coking cycles (the present embodiment preferably lasts for terminating pervious 2.5h to coking cycles).
3) the coking later stage：Terminating the pervious 1~2.5h of coking in coke furnace carbonization chamber 1, (the present embodiment preferably lasts for coking
The pervious 2.5h of end cycle), repeating said steps 1) operation：
The inner passage of pusher side coke-stove gas recovery system 3 is closed, the inside for opening coke side coke-stove gas recovery system 2 is logical
Road, specific operation process are the regulating valve closed on ammonia water pipe 3.8, close pusher side manual modulation valve 3.4 and pusher side automatic adjustment
Valve 3.5；Simultaneously first adjust water-sealed valve 2.2 level control valve 2.23, with this come adjust the water accumulation level inside water-sealed valve 2.2 with
Ensure that the pressure inside coke furnace carbonization chamber 1 is -3~3Pa, then opens coke side automatic regulating valve 2.3 and make automatic relief valve
2.5 are closed so that coke furnace carbonization chamber 1 keeps inside to communicate with coke side gas collecting tube 2.4, starts coke side gas collecting tube 2.4
On coke side heat resisting exhauster, the raw coke oven gas that extraction coke furnace carbonization chamber 1 inside generates, and using the indirect type heat exchanger control into
Enter temperature≤300 DEG C of the raw coke oven gas of coke oven combustion chamber, raw coke oven gas is used as supplement fuel in coke oven combustion chamber, until coke oven knot
Close-burning beam.
After waiting for coking furnace coking, coke side automatic regulating valve 2.3 is closed, closes the level control valve of water-sealed valve 2.2
2.23, opening the water injection valve 2.22 of water-sealed valve 2.2 makes to be full of water in the U-shaped pipe of water-sealed valve 2.2, blocks coke side gas passage,
Then the hole 1.1 of coalingging on coke furnace carbonization chamber 1 is opened again.
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) or step 3) is stated, the raw coke oven gas generated in extraction coke furnace carbonization chamber 1 is simultaneously sent into coke oven combustion chamber as benefit
Fill 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 2.3 of room 1 is closed, and the unlatching of automatic regulating valve 2.5 is diffused, and raw coke oven gas passes through automatic relief igniter
It is discharged after the sparking burning of automatic ignitor 2.61 inside 2.6, the whole of raw coke oven gas is avoided to diffuse pollution on the environment, pole
The big atmosphere quality for improving 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 (10)
1. a kind of coke-stove gas sub-prime recoverying and utilizing method carries out in the coke furnace carbonization chamber (1) and coke oven combustion chamber of coke oven,
It is characterized in that：In coke furnace carbonization chamber (1) coke side setting coke side coke-stove gas recovery system (2) for recycling coke furnace carbonization chamber (1)
In the raw coke oven gas of coking initial stage and the generation of coking latter stage and coke oven combustion chamber is sent into as coke oven fuel, in coking mid-term, coke oven
The raw coke oven gas generated in pusher side coke-stove gas recovery system (3) the recycling coke furnace carbonization chamber (1) of carbonization chamber (1) pusher side setting.
2. coke-stove gas sub-prime recoverying and utilizing method according to claim 1, it is characterised in that：The coking initial stage is coke oven
Carbonization chamber (1) installs 1~2.5h that coking coal after coal starts coking.
3. coke-stove gas sub-prime recoverying and utilizing method according to claim 1, it is characterised in that：The coking latter stage is coking
Coal terminates 1~2.5h before coking.
4. according to claims 1 or 2 or the 3 coke-stove gas sub-prime recoverying and utilizing methods, it is characterised in that：At coking initial stage and
In coking latter stage, it is -3~3Pa to control the coke furnace carbonization chamber (1) internal pressure.
5. according to claims 1 or 2 or the 3 coke-stove gas sub-prime recoverying and utilizing methods, it is characterised in that：In coking mid-term,
If pusher side coke-stove gas recovery system (3) breaks down or coke furnace carbonization chamber (1) interior pressure exceeds coking operation ability, using coke
The interior raw coke oven gas generated of side coke-stove gas recovery system (2) recycling coke furnace carbonization chamber (1) is simultaneously sent to coke oven combustion chamber.
6. coke-stove gas sub-prime recoverying and utilizing method according to claim 4, it is characterised in that：The coke side coke-stove gas returns
Receipts system (2) includes the water-sealed valve (2.2) that one end is used to connect coke side tedge (1.1), the other end of the water-sealed valve (2.2)
Two gas pipings are connected, a gas piping connects the coke side gas collecting tube (2.4) for conveying raw coke oven gas to coke oven combustion chamber,
Igniter (2.6) is diffused in another gas piping connection.
7. coke-stove gas sub-prime recoverying and utilizing method according to claim 6, it is characterised in that：The water-sealed valve (2.2) is U
Type pipeline is equipped with level control valve (2.23) in U-shaped pipe.
8. coke-stove gas sub-prime recoverying and utilizing method described according to claim 6 or 7, it is characterised in that：The water-sealed valve (2.2)
The gas piping being connected with coke side gas collecting tube (2.4) is equipped with coke side automatic regulating valve (2.3)；
The water-sealed valve (2.2) diffuses automatic regulating valve with diffusing gas piping that igniter (2.6) is connected and be equipped with
(2.5), described diffuse is equipped with automatic ignitor (2.61) in igniter (2.6).
9. coke-stove gas sub-prime recoverying and utilizing method according to claim 8, it is characterised in that：In coke side gas collecting tube (2.4)
Be additionally provided with temperature controller and heat-resisting exhaust fan on the gas piping being connect with coke oven combustion chamber, the temperature controller control into
Enter raw gas temperature≤300 DEG C in coke oven combustion room.
10. coke-stove gas sub-prime recoverying and utilizing method according to claim 9, it is characterised in that：Raw gas temperature is more than 300
DEG C when, full open level regulating valve (2.23), open water-sealed valve (2.2) water injection valve (2.22) to raw coke oven gas sprinkle water cool down.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112920817A (en) * | 2021-02-19 | 2021-06-08 | 常州江南冶金科技有限公司 | Automatic control system and control method for raw coke oven gas sensible heat recovery in ascending pipe of coke oven |
| CN113862006A (en) * | 2020-06-30 | 2021-12-31 | 宝山钢铁股份有限公司 | Method for controlling smoke generation during opening of coke oven ascending pipe |
| 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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102965131A (en) * | 2012-10-15 | 2013-03-13 | 金涌 | Efficient and clean utilization technology for highly volatile young coal |
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2018
- 2018-05-31 CN CN201810552580.3A patent/CN108728135B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102965131A (en) * | 2012-10-15 | 2013-03-13 | 金涌 | Efficient and clean utilization technology for highly volatile young coal |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113862006A (en) * | 2020-06-30 | 2021-12-31 | 宝山钢铁股份有限公司 | Method for controlling smoke generation during opening of coke oven ascending pipe |
| CN112920817A (en) * | 2021-02-19 | 2021-06-08 | 常州江南冶金科技有限公司 | Automatic control system and control method for raw coke oven gas sensible heat recovery in ascending pipe of coke oven |
| 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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