CN106918029A - A kind of coking energy coupling optimization and pollutant collaboration governing system and its method - Google Patents
A kind of coking energy coupling optimization and pollutant collaboration governing system and its method Download PDFInfo
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- CN106918029A CN106918029A CN201710241313.XA CN201710241313A CN106918029A CN 106918029 A CN106918029 A CN 106918029A CN 201710241313 A CN201710241313 A CN 201710241313A CN 106918029 A CN106918029 A CN 106918029A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G1/00—Steam superheating characterised by heating method
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Coke Industry (AREA)
Abstract
The invention discloses a kind of optimization of coking energy coupling and pollutant collaboration governing system, reclaim subsystem, flue gas waste heat recovery subsystem, VOCs pollutants and cooperate with to regulate and control to utilize subsystem using subsystem, gas cleaning subsystem and heat including coke oven, red burnt Exposure degree subsystem, crude-gas sensible heat, red Jiao reclaims its sensible heat by red burnt Exposure degree subsystem；Raw coke oven gas reclaims subsystem and reclaims its sensible heat by crude-gas sensible heat；The waste heat of flue gas waste heat recovery subsystem recovered flue gas；VOCs pollutants are delivered to combustion chambers burn by the collaboration of VOCs pollutants using subsystem；The flue gas for collecting is purified through gas cleaning subsystem；Heat regulation and control are allocated the heat of recovery using subsystem, and are translated into electric energy.The present invention reclaims waste heat classification in process of coking, produces the low-grade steam of senior middle school, while the characteristics of making full use of the complementary energy after gas cleaning and VOCs to be rich in heat, realizes that energy use efficiency is maximized and pollutant is cooperateed with and administered, realizes that energy-conservation and emission reduction develop simultaneously.
Description
Technical field
Technical field is utilized the invention belongs to industrial afterheat recovery, more particularly to a kind of coking energy coupling optimizes and pollutes
Thing cooperates with governing system and its method.
Background technology
Coking industry high energy consumption, pollution weight, enjoy industry to pay close attention to.From the whole energy stream and material mobile equilibrium of coke oven production
See, the sensible heat that 950 DEG C of -1050 DEG C of red heat coke released from coke furnace carbonization chamber are taken out of accounts for whole coke oven heat expenditure
37%；Raw coke oven gas of the temperature at 650 DEG C -750 DEG C into coke oven coke oven uprising tube, its sensible heat for containing accounts for whole coke oven heat branch
36% for going out；The waste heat that 180 DEG C -230 DEG C of coke oven flue gas are taken out of accounts for the 16% of whole coke oven heat expenditure；Coking furnace shaft table
The various radiation losses in face account for the 11% of whole coke oven heat expenditure, so, during high efficiente callback and utilization coking by coke oven
Produced residual heat resources have become one of main path of raising coke oven efficiency of energy utilization, are also to economize on resources and energy-conservation
Main development direction and potentiality where.So far, the power-saving technology that coking region has been directed to both at home and abroad is expanded and much ground
Study carefully, achieve many achievements, the dry coke quenching Exposure degree technology that the red burnt sensible heat of high temperature section there are ripe commercial applications is given
To recycle, 950-1100 DEG C of red heat coke can be cooled to 200 DEG C or so, realize efficiently returning for red heat coke sensible heat
Receive, it has become one of power-saving technology that country widelys popularize.The waste heat of coke-oven flue gas recovery technology of low-temperature zone also has one
Fixed business application.The Exposure degree of coal oven dithio-gas is still in the pilot scale stage, and this is the technology currently given priority to both at home and abroad.
The heat release on body of heater surface can furnace wall is adiabatic to reduce loss by strengthening.Although above-mentioned several waste heats have corresponding recuperation of heat hand
Section, but because each measure is mutually isolated, recuperation of heat is not high using overall efficiency.
Meanwhile, the improvement of the various pollutants that process of coking is discharged is also industry research focus.Coke oven regional environment is dirty
Dye factor is more, and the sulfur dioxide and nitrogen oxides in coke oven flue gas are national environmental protection policy emphasis management and control objects.Grind in recent years
The desulphurization denitration cock-oven gas purifying technique implemented is sent out, generally with the deficiency that high energy consumption, high cost, investment are high；Coking simultaneously
During the VOC (volatile organic matter) etc. that produces be also national environmental protection policy management and control the emphasis source of atmospheric pollution, qualified discharge
Entreprise cost will be dramatically increased.
On the one hand, Dry Quenching Technology, waste heat of coke-oven flue gas recovery technology, crude-gas sensible heat recovery technology etc., both for
The technology that single grade thermal source is developed, also not from the relation between the various grade thermals source of angle analysis of system, due to difference
Thermal source recoverable energy grad and utilization ratio be different, lack and overall consider to cause efficiency of energy utilization not high；Separately
On the one hand, the green technology such as coke oven flue gas desulphurization denitration, the improvement of coking volatile organic matter is also the technology of single exploitation, is lacked
System combination and optimization are carried out from the angle of coking integrated artistic, causes energy consumption to increase and cost increase.The destructive distillation of coal needs
Heated by gas, also produces heat smoke after gas-fired；Coal gas is produced while coal destructive distillation, sensible heat is also carried in coal gas；Destructive distillation
What is produced is red burnt also with amount of heat.In the process, material stream, the flowing of energy stream and carbon stream is carried out simultaneously,
Make the energy resource consumption of whole production minimum, in addition to giving full play to the efficiency of various individual event power-saving technologies, the coupling between them
Conjunction relation also needs overall consideration, because each several part influences each other, causes the available total amount of the various energy and energy grad
Change, and the height of energy grad is closely related with the performance of various individual event power-saving technology efficiency.Meanwhile, existing desulphurization denitration cigarette
The improvement of the high energy consumption and VOCs of gas purification techniques and energy regenerating are also closely bound up with the energy use efficiency that coking is produced.Cause
This, will further improve the energy use efficiency of coking production, it is necessary to the coupling optimization of coking energy system and emission
Improvement is furtherd investigate.
In the prior art, the Chinese patent application of Application No. CN201610061286.3 discloses a kind of coke-oven plant's flue gas
Energy-conserving and environment-protective comprehensive treatment device and technique, the invention still just for the single power-saving technology of coke oven flue gas, do not consider red
The coupling optimization of burnt, crude-gas sensible heat, the patent also only considered the improvement of flue gas, not account for the improvement of VOCs.
In general, coking by coke oven technique will realize the lifting of energy efficiency and the emission reduction of pollutant, it is necessary to from coking
The angle of technique is coupled to red burnt sensible heat, crude-gas sensible heat, fume afterheat, gas cleaning and volatile organic matter improvement etc.
Optimization, realizes that pollutant collaboration is administered while efficiency of energy utilization is improved, and realizes that energy-conservation is advanced simultaneously with emission reduction, and lifting is burnt
The environmental benefit and economic benefit of chemical industry sequence.
The content of the invention
The present invention provides a kind of coking energy coupling optimization and pollutant collaboration governing system and its method, by coke oven
Energy stream and material flow analysis, be divided into red burnt Exposure degree subsystem, crude-gas sensible heat and reclaim more than subsystem and flue gas
Recuperation of heat subsystem, forms high, normal, basic steam, and steam is conveyed into heat to regulate and control to utilize subsystem, lifts each subsystem waste heat
The efficiency of way of recycling and heat energy utilization mode, realizes that the energy use efficiency of whole coking energy system is maximized, and fully
The characteristics of being rich in heat using the complementary energy and volatile organic matter after the gas cleaning of coke oven region, profit is cooperateed with by VOCs pollutants
Improvement is coupled with subsystem, gas cleaning subsystem, is realized that energy-saving and emission-reduction are advanced simultaneously.
Technical scheme is as follows：
A kind of optimization of coking energy coupling and pollutant collaboration governing system, including coke oven, red burnt Exposure degree subsystem,
Crude-gas sensible heat reclaims subsystem, flue gas waste heat recovery subsystem, the collaboration of VOCs pollutants using subsystem, gas cleaning subsystem
System and heat regulation and control utilize subsystem；Described system is administered as core with energy coupling and pollutant collaboration, is Jie with steam
Matter reclaims subsystem and flue gas waste heat recovery subsystem to more than different grades by red burnt Exposure degree subsystem, crude-gas sensible heat
Heat carries out classification recovery, while realizing low temperature exhaust heat energy resource after energy resource and the gas cleaning in VOCs pollutants
Reclaim, and system-wide coupling optimization is realized using subsystem by described heat regulation and control；
Described coke oven includes several carbonization chambers, and the both sides of the carbonization chamber described in each are all provided with combuster；Raw coal exists
Red heat coke, raw coke oven gas are obtained in described carbonization chamber after destructive distillation, coal gas burns in described combustion chamber and produces flue gas；
The red heat coke obtained from after described carbonization chamber destructive distillation is sent to described red burnt Exposure degree through conveying device
Subsystem, high steam is obtained through heat exchange；The raw coke oven gas gushed out from described carbonization chamber top enters described raw coke oven gas and shows
Recuperation of heat subsystem, middle pressure steam is obtained through heat exchange；The flue gas of the combustion chamber sends into gas cleaning subsystem after collection
Purified, flue gas purification while, wherein the heat energy being rich in obtains low by flue gas waste heat recovery subsystem through heat exchange
Pressure steam；High steam, middle pressure steam and low-pressure steam are regulated and controled by described heat carries out comprehensive step profit using subsystem
With and produce electric energy, realize to red heat coke, the recovery step by step of raw coke oven gas grade heat different with flue gas and cascade utilization；It is described
The collaboration of VOCs pollutants VOCs is delivered into described burning Indoor Combustion using subsystem, the flue gas for collecting is through described flue gas
After purifying subsystem purification, its heat is reclaimed, and realize the collaboration treatment of pollutant.
Preferably, TRT, condenser, water replanishing device that described heat regulation and control include being sequentially connected using subsystem
And oxygen-eliminating device, the high steam obtained with described red burnt Exposure degree subsystem heat exchange and with described crude-gas sensible heat return
The middle pressure steam that obtains of subsystem heat exchange is received to be connected with described TRT through pipeline respectively, described oxygen-eliminating device with it is described
The connection of red burnt Exposure degree subsystem, described oxygen-eliminating device is also interconnected with described flue gas waste heat recovery subsystem and formed
Circulation.
Preferably, described red burnt Exposure degree subsystem includes coke dry quenching furnace, blower fan and waste heat boiler, described dry to put out
Coke oven receives red Jiao from carbonization chamber output, and described coke dry quenching furnace is also interconnected with described waste heat boiler and forms circulation,
Blower fan is provided with the pipeline that described waste heat boiler is interconnected with described coke dry quenching furnace.
Preferably, it is additionally provided with the first dedusting on the pipeline that described waste heat boiler is interconnected with described coke dry quenching furnace
Device and the second deduster.
Preferably, described waste heat boiler connects to form circulation with described TRT and described oxygen-eliminating device；It is described
Waste heat boiler also with HP steam drum be interconnected, for adjusting steam pressure.
Preferably, described crude-gas sensible heat reclaims subsystem to be included rising heat exchange of heat pipe and declines heat exchange of heat pipe, described
Rising heat exchange of heat pipe connected with described carbonization chamber, described decline heat exchange of heat pipe is connected with raw coke oven gas retracting device.
Preferably, described VOCs pollutants collaboration is used to collect the VOCs in coking groove tank region using subsystem, and will
It delivers to coke oven combustion chamber.
Preferably, described gas cleaning subsystem includes that the desulfurizing tower being sequentially connected, deduster, booster fan, heat are handed over
Parallel operation, combustion furnace and denitrification apparatus, described denitrification apparatus are also connected with described heat exchanger, described heat exchanger also with
Described flue gas waste heat recovery subsystem connection.
Preferably, described flue gas waste heat recovery subsystem includes heat exchanger and water and steam pipework.
Method the invention also discloses governing system is cooperateed with using above-mentioned coking energy coupling optimization and pollutant, will
Red burnt sensible heat, crude-gas sensible heat grade heat different with fume afterheat in coking by coke oven technique, with steam as medium, includes same
One energy system is integrated, and realizes that energy is reclaimed and cascade utilization step by step；Coke oven flue gas desulphurization denitration is administered and coking groove
The energy that the volatile organic matter of tank area alignment is rich in carries out coupling optimization, realizes the maximization and dirt of energy utilization efficiency
The collaboration for contaminating thing is administered.
Compared with prior art, beneficial effects of the present invention are as follows：
First, a kind of coking energy coupling optimization of the invention and pollutant collaboration governing system, by the energy to coke oven
Stream is scientifically analyzed, and is divided into red burnt Exposure degree subsystem, crude-gas sensible heat and is reclaimed subsystem and fume afterheat time
Subsystem is received, the low-grade steam of senior middle school is formed, and with steam as medium, the high steam that red burnt Exposure degree subsystem is formed,
Driving steam turbine generating is directly used in, crude-gas sensible heat reclaims the middle pressure steam that subsystem is formed, is also directly used in driving steamer
Machine generates electricity, the low-pressure steam that flue gas waste heat recovery subsystem is formed, for steam deoxygenation, therefore, the present invention uses corresponding height
Effect waste heat recovery mode carry out step by step, high efficiente callback, more high-grade energy is reclaimed as far as possible, at the same be also carried out coupling optimization, shape
Into energy cascade utilization, the energy utilization efficiency of whole coke making process is improved.
2nd, a kind of coking energy coupling optimization of the invention and pollutant collaboration governing system, by the material to coke oven
Stream is scientifically analyzed, including raw coke oven gas, the flue gas of combustion chambers burn generation and coking tank field that raw coal destructive distillation is produced are received
The VOCs that collection is obtained, these material streams also have certain energy, but also easily pollute environment, and the material stream is carried out coupling by the present invention
Close and administer, realize energy-saving and emission-reduction.
3rd, a kind of coking energy coupling optimization of the invention and pollutant collaboration governing system, by coking by coke oven technique
The various heats of release carry out comprehensive reutilization, are optimized by the coupling to different grade thermals source, improve whole coke making process
Energy utilization efficiency, and energy-conserving and environment-protective to coking of coal technique carry out the comprehensive regulation, both the coupling Optimum utilization including energy,
Include flue gas, raw coke oven gas, the improvement of volatile organic matter again, the volatile organic matter containing heat and energy is coupled into energy
Unified consideration is given in system, reasonable energy utilization while administering.
Brief description of the drawings
Fig. 1 is the structural representation that a kind of coking energy coupling optimization of the invention and pollutant cooperate with governing system.
Specific embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate this hair
It is bright, rather than limit protection scope of the present invention.Those skilled in the art are according to changing that the present invention makes in actual applications
Enter and adjust, still fall within protection scope of the present invention.
In order to better illustrate the present invention, the present invention is described in detail below with accompanying drawing.
As shown in figure 1, a kind of coking energy coupling optimization of the invention and pollutant collaboration governing system, including coke oven 6,
Described coke oven 6 includes several carbonization chambers 5, and the both sides of the carbonization chamber 5 described in each are all provided with combuster 28；
Present invention collaboration governing system also includes that red burnt Exposure degree subsystem, crude-gas sensible heat reclaim subsystem, flue gas
Waste heat recovery subsystem, gas cleaning subsystem, the collaboration of VOCs pollutants utilize subsystem using subsystem and heat regulation and control；
Described red burnt Exposure degree subsystem, described red burnt Exposure degree are provided with the lower section of described carbonization chamber 5
Subsystem is used to reclaim the sensible heat of coke；
The top of the carbonization chamber 5 described in each is equipped with described crude-gas sensible heat and reclaims subsystem, described waste coal
Gas Exposure degree subsystem is used to reclaim the sensible heat of raw coke oven gas；
The gas cleaning subsystem being provided with described coke oven 6 described in being sequentially connected and described flue gas waste heat recovery
Subsystem, for purifying smoke and the waste heat of recovered flue gas；
Described heat regulation and control using subsystem with described red burnt Exposure degree subsystem, described crude-gas sensible heat
Reclaim subsystem and the connection of described flue gas waste heat recovery subsystem, described heat regulation and control utilize subsystem for by recovery
Heat is converted to electric energy；
Described VOCs pollutants collaboration is connected using subsystem with described combustion chamber 28, and VOCs is delivered into combustion chamber 28
Burning, realizes the recovery to the energy resource of VOCs pollutants, and the collaboration of pollutant is processed.
Raw coal obtains red heat coke, raw coke oven gas and flue gas after the described destructive distillation of carbonization chamber 5, and red heat coke is delivered to described
Red burnt Exposure degree subsystem, high steam is obtained through heat exchange, and raw coke oven gas delivers to described crude-gas sensible heat and reclaims subsystem,
Middle pressure steam is obtained through heat exchange, high steam and middle pressure steam deliver to described heat regulation and control and produce electricity using subsystem
Can, flue gas delivers to described flue gas waste heat recovery subsystem after being purified through described gas cleaning subsystem, obtained through heat exchange
Low-pressure steam, is used to remove the oxygen being dissolved in during described heat regulates and controls the water using subsystem, realizes to red heat coke, famine
Coal gas heat grade different with flue gas is reclaimed and cascade utilization step by step；
Described combustion chamber 28 is also cooperateed with described VOCs pollutants and is connected using subsystem, described VOCs pollutants
Collaboration is burnt using the volatile organic matter of subsystem in described combustion chamber 28, and flue gas delivers to described fume afterheat after collecting
Reclaim subsystem to be processed through desulphurization denitration, realize pollutant
Collaboration is processed.
The present invention each heat recovery subsystem is exchanged the steam for obtaining and is converted to electric energy, but ability with steam as medium
Field technique personnel can also be changed heat by other media mode, storage is used.In specific embodiment of the invention, root
The energy feature of subsystem and flue gas waste heat recovery subsystem is reclaimed according to red burnt Exposure degree subsystem, crude-gas sensible heat, with heat
The mode of exchange obtains the low-grade steam of senior middle school, and high, middle grade steam is used to generate electricity, and low-grade steam is used for deoxygenation, specifically：
TRT, condenser 24, water replanishing device 23 and oxygen-eliminating device 22 that described heat regulation and control include being sequentially connected using subsystem,
The high steam that is obtained with described red burnt Exposure degree subsystem heat exchange and reclaim subsystem with described crude-gas sensible heat
The middle pressure steam that heat exchange is obtained is connected through pipeline with described TRT respectively, for generating electricity, described oxygen-eliminating device 22 with
Described red burnt Exposure degree subsystem connection, described oxygen-eliminating device 22 is also mutually interconnected with described flue gas waste heat recovery subsystem
It is logical to form circulation, for deoxygenation.Therefore, the present invention obtains the red burnt sensible heat and crude-gas sensible heat of senior middle school's grade through heat exchange
Steam is used to generate electricity, and the steam that low-grade fume afterheat is obtained through heat exchange is used for deoxygenation, realize energy reclaim step by step and
Cascade utilization, energy coupling is carried out using the steam of different grades (pressure).
Described TRT includes steam turbine 27 and generator 26, through described red burnt Exposure degree subsystem heat exchange
The middle pressure steam that the high steam for obtaining and the crude-gas sensible heat recovery subsystem heat exchange described in are obtained is sent to steamer
Machine 27, as the vapour source of steam turbine 27, for driving generator 26 to generate electricity.
Described water replanishing device 23 is used for system supplement because of the water of heat transfer losses.
Described red burnt Exposure degree subsystem of the invention includes coke dry quenching furnace 18, blower fan 19 and waste heat boiler 21, institute
The coke dry quenching furnace 18 stated is connected with described carbonization chamber 5, and described coke dry quenching furnace 18 is also mutually interconnected with described waste heat boiler 21
It is logical to form circulation, it is provided with blower fan 19 on the pipeline that described waste heat boiler 21 is interconnected with described coke dry quenching furnace 18.
Further, it is additionally provided with first on the pipeline that described waste heat boiler 21 is interconnected with described coke dry quenching furnace 18
The deduster 20 of deduster 29 and second.
Further, described waste heat boiler 21 connects formation circulation with described steam turbine 27 and described oxygen-eliminating device 22；
Described waste heat boiler 21 is also interconnected with HP steam drum 7, for adjusting steam pressure.
Further, the lower section of described coke dry quenching furnace 18 is provided with conveyer belt 17, for transmitting finished coke.
Crude-gas sensible heat of the present invention reclaims subsystem to be included rising heat exchange of heat pipe 4 and declines heat exchange of heat pipe 3, is risen
Heat exchange of heat pipe 4 is connected with described carbonization chamber 5, and described decline heat exchange of heat pipe 3 is connected with raw coke oven gas retracting device 2.
Further, the steam for being produced in rising heat exchange of heat pipe 4, decline heat exchange of heat pipe 3 is by pipeline in middle pressure drum 1
Converge, and steam turbine 27 is delivered to by middle pressure drum 1.
Gas cleaning subsystem of the present invention include be sequentially connected desulfurizing tower 13, deduster 12, booster fan 11,
Heat exchanger 10, combustion furnace 9 and denitrification apparatus 8, described denitrification apparatus 8 are also connected with described heat exchanger 10, described
Heat exchanger 10 is also connected with described flue gas waste heat recovery subsystem, through the environmentally friendly gas after the discharge purification of chimney 15.
Further, the main equipment of described flue gas waste heat recovery subsystem is heat exchanger 16, described heat exchanger 16 and institute
The oxygen-eliminating device 22 stated is interconnected and forms circulation, for low-grade steam to be passed through into the deoxygenation of oxygen-eliminating device 22.
Further, described VOCs pollutants collaboration is coking groove tank 25 using subsystem, and described combustion chamber 28 also connects
It is connected with coking groove tank 25, after the VOCs of the shown region of coking groove tank 25 release is unified to collect, delivering in combustion chamber 28 is carried out
Burning is processed, and realizes that energy conservation and pollutant collaboration are administered.
A kind of coking energy coupling optimization of the invention and pollutant cooperate with governing system, and its technique is：In the combustion of coke oven 6
Burn in room 28 under the heat effect of gas-fired, raw coal destructive distillation in the carbonization chamber 5 of coke oven 6 forms red Jiao after destructive distillation, its temperature is
950 DEG C -1050 DEG C, red Jiao is cooled to finished coke in coke dry quenching furnace 18, and user is transferred to by conveyer belt 17.Raw coal destructive distillation
Raw coke oven gas can be discharged simultaneously, its temperature is 650 DEG C -750 DEG C, while calorific value itself is very high, can be used as the fuel of coke oven 6.Coal
Flue gas produced by burning Indoor Combustion of the gas in coke oven 6 contains atmosphere pollution, such as SOX、NOXDeng, its temperature be 180 DEG C-
230 DEG C, need to carry out desulphurization denitration purified treatment could arrange to air.
CDQ is the maximally effective technique for absorbing red burnt sensible heat at present, widely used in coking by coke oven operation.It is dry
The flue gas after heat is absorbed in quenching stove 18 carries out recuperation of heat after disposable dust remover 29 into waste heat boiler 21, from waste heat boiler
21 out after flue gas again through the dedusting of secondary filter 20 after, pumped by blower fan 19 and be circulated to coke dry quenching furnace.In waste heat
Come from oxygen-eliminating device 22 for absorbing the pure water of quenching obvious heat of smoke in boiler 21, formation high steam is sent to after absorbing heat
Steam turbine 27, for generating electricity, boiler is externally provided with HP steam drum 7, for controlling to adjust steam pressure.
The raw coke oven gas that raw coal destructive distillation is produced is discharged from carbonization chamber 5, itself carries sensible heat, but due to its complicated, it is burnt
Oil content is big, and corrosion is revealed in easy fouling and generation acid so that its sensible heat is difficult with.It is commonly employed in the art to be discharged in raw coke oven gas
A large amount of ammoniacal liquor are sprayed in pipeline makes its cooling and dedusting, is then collected utilization, and the ammoniacal liquor after dust suction of absorbing heat need to further be located
Could be reused after reason, substantial amounts of ammoniacal liquor demand causes that the aqua ammonia pump power consumption for conveying ammoniacal liquor is higher.The present invention is resistance to by developing
The tedge high-performance heat exchanger 4 and down-comer high-performance heat exchanger 3 of high-temp anti-corrosion anti-coking, make successively to enter into tedge heat exchange
The heat of the raw coke oven gas in device 4, decline heat exchange of heat pipe 3 is fully absorbed, then is reclaimed profit by raw coke oven gas retracting device 2
With.Rise heat exchange of heat pipe 4 and decline heat exchange of heat pipe 3 and made using the material of anticorrosion, high temperature resistant, anti-coking, high heat conduction, together
When, temperature and pressure is strictly controlled, corrosion and coking can be made fully to reduce.Changed in rising heat exchange of heat pipe 4 and down-comer
Turn into middle pressure steam in hot device 3 after absorbing pure water heat, as the filling of steam turbine 27, further drive generator 26 to be sent out
Electricity.
Coal gas burns in a combustion chamber in coke oven 6, and produced flue gas sends to smoke eliminator after being pumped by blower fan 14
Desulphurization denitration is carried out, desulfurizing tower 13 enters dedusting in deduster 12 after sloughing sulphur content, then delivers to heat exchanger by booster fan 11
10 are exchanged heat, and the flue gas after heat exchange enters back into denitration process in the concurrent heating of combustion furnace 9 and denitrification apparatus 8, the low temperature cigarette after treatment
After gas feeds water through the preheating oxygen-eliminating device 22 of heat exchanger 16 again, discharged by chimney 15.The pure water that heat is absorbed in heat exchanger 16 becomes
Hot water (or low-pressure steam), can reduce oxygen-eliminating device 22 and use vapour.The water of waste heat boiler 21 is delivered to essentially from condenser 24.Moisturizing is filled
Put the water lost during 23 replenishment cycles uses.Water becomes superheated steam, quilt after absorbing quenching heat in waste heat boiler 21
Steam turbine 27 is delivered to for generating electricity.
The VOCs of the region of coking groove tank 25 release is unified to be delivered to after collecting carries out burning treatment in the combustion chamber of coke oven 6, real
Existing energy conservation and pollutant collaboration are administered.
In this example, the water that the water in circulation carrys out the water of the condensation of condenser 24 and supplemented through desalination water replanishing device 23,
These water are existing to absorb heat from flue gas heat-exchange unit 16, and having again rise heat exchange of heat pipe 4 from raw coke oven gas and decline heat exchange of heat pipe 3
It is middle absorbing heat, but mainly absorb heat from coke dry quenching furnace 18.Absorb the water after heat and become steam, according to grade
Just, high pressure, middle pressure, low-pressure steam are formed, generating, deoxygenation, preheating etc. is respectively used to according to different grades.High-grade steam
Reused after being condensed into water by condenser 24 again after generating.Steam of different grades can be allocated and used, and be used for Ru low-grade
Deoxygenation, then may not necessarily be used for deoxygenation with high-grade steam, can improve the utilization ratio of high-grade steam.
In this example, the temperature after desulfurizing tower 13 of the heat contained by coke oven flue gas decreases, and is unfavorable for follow-up denitration,
Need the denitration after heating in combustion furnace 9.Still there is uniform temperature after gas cleaning, be using this part of waste heat, by itself and entrance
Flue gas before combustion furnace 9 is exchanged heat, then the flue gas after cooling for feed-water preheating (or produce low-pressure steam) further with
Flue gas low-temperature waste heat, so as to accomplish making full use of for smoke gas treatment and waste heat.Contained heat is raised pipe heat exchange in raw coke oven gas
After device 4 and decline heat exchange of heat pipe 3 absorb, raw gas temperature reduction reduces raw coke oven gas cooling, a large amount of ammoniacal liquor of washing, can
Save substantial amounts of ammoniacal liquor conveying and treatment energy consumption.Red burnt heat absorbs heat Posterior circle and uses by dry coke quenching mode, both may be used
To make full use of the heat in recyclegas, turn avoid the thermal loss that coke wet quenching causes and the environment that evaporation water causes is dirty
Dye.The VOCs in the area of coking groove tank 25, both containing certain energy, is polluted the environment again, and the burning of coke oven 6 is delivered to after being collected
Room 28 carries out burning treatment, can both reduce environmental pollution total amount, and its heat can be utilized again, moreover it is possible to by the de- of combustion product gases
Sulphur, denitration reach the further removing of pollutant.
The present invention, with the heat of the releases such as red burnt sensible heat, crude-gas sensible heat and fume afterheat, is led in coking by coke oven operation
Comprehensive optimal control is carried out after crossing recuperation of heat respectively so that different grade thermals source can make full use of, and improve Gao Pin as far as possible
Position thermal source so that energy utilization efficiency is further improved, has accomplished the coupling optimization of coking energy system.Meanwhile, to coke oven cigarette
The improvement of waste heat and various pollutants is fully connected with the utilization of waste heat after gas purification, is fully recycled while administering each
Thermal source is planted, has accomplished that the collaboration of pollutant is administered.
Present invention disclosed above preferred embodiment is only intended to help and illustrates the present invention.Preferred embodiment is not detailed
All of details is described, it is only described specific embodiment that the invention is not limited yet.Obviously, according to the content of this specification,
Can make many modifications and variations.This specification is chosen and specifically describes these embodiments, is to preferably explain the present invention
Principle and practical application so that skilled artisan can be best understood by and utilize the present invention.The present invention is only
Limited by claims and its four corner and equivalent.
Claims (6)
1. a kind of coking energy coupling optimization and pollutant cooperate with governing system, it is characterised in that returned including coke oven, red burnt sensible heat
Receive subsystem, crude-gas sensible heat and reclaim subsystem, flue gas waste heat recovery subsystem, the collaboration of VOCs pollutants using subsystem, cigarette
Gas purifying subsystem and heat regulation and control utilize subsystem；Described system is administered as core with energy coupling and pollutant collaboration,
Subsystem and flue gas waste heat recovery subsystem pair are reclaimed by red burnt Exposure degree subsystem, crude-gas sensible heat by medium of steam
Different grade waste heats carry out classification recovery, while realizing low temperature exhaust heat after energy resource and the gas cleaning in VOCs pollutants
The recovery of energy resource, and realize system-wide coupling optimization using subsystem by described heat regulation and control；
Described coke oven includes several carbonization chambers, and the both sides of the carbonization chamber described in each are all provided with combuster；Raw coal is described
Carbonization chamber in obtain red heat coke, raw coke oven gas after destructive distillation, coal gas burns generation flue gas in described combustion chamber；
The red heat coke obtained from after described carbonization chamber destructive distillation is sent to described red burnt Exposure degree subsystem through conveying device
System, high steam is obtained through heat exchange；The raw coke oven gas gushed out from described carbonization chamber top enters described crude-gas sensible heat and returns
Subsystem is received, middle pressure steam is obtained through heat exchange；The flue gas of the combustion chamber is sent into gas cleaning subsystem after collection and is given
Purification, flue gas purification while, wherein the heat energy being rich in is obtained by described flue gas waste heat recovery subsystem through heat exchange
Low-pressure steam；High steam, middle pressure steam and low-pressure steam regulate and control to carry out comprehensive step using subsystem by described heat
Using and produce electric energy, realize to red heat coke, the recovery step by step of raw coke oven gas grade heat different with flue gas and cascade utilization；Institute
VOCs is delivered to described burning Indoor Combustion by the VOCs pollutants collaboration stated using subsystem, and the flue gas for collecting is through described cigarette
After the purification of gas purifying subsystem, its heat is reclaimed, and realize the collaboration treatment of pollutant.
2. coking energy coupling optimization according to claim 1 and pollutant cooperate with governing system, it is characterised in that described
Heat regulation and control include the TRT, condenser, water replanishing device and the oxygen-eliminating device that are sequentially connected using subsystem, it is red with described
High steam and obtained with described crude-gas sensible heat recovery subsystem heat exchange that burnt Exposure degree subsystem heat exchange is obtained
Middle pressure steam connected with described TRT through pipeline respectively, described oxygen-eliminating device and described red burnt Exposure degree subsystem
System connection, described oxygen-eliminating device is also interconnected with described flue gas waste heat recovery subsystem and forms circulation.
3. coking energy coupling optimization according to claim 1 and pollutant cooperate with governing system, it is characterised in that described
Crude-gas sensible heat reclaim subsystem and include rising heat exchange of heat pipe and decline heat exchange of heat pipe, described rising heat exchange of heat pipe with it is described
Carbonization chamber connection, described decline heat exchange of heat pipe connects with raw coke oven gas retracting device.
4. coking energy coupling optimization according to claim 1 and pollutant cooperate with governing system, it is characterised in that described
The collaboration of VOCs pollutants be used to collect the VOCs in coking groove tank region using subsystem, and be passed to described combustion chamber.
5. coking energy coupling optimization according to claim 1 and pollutant cooperate with governing system, it is characterised in that described
Gas cleaning subsystem include be sequentially connected desulfurizing tower, deduster, booster fan, heat exchanger, combustion furnace and denitration dress
Put, described denitrification apparatus are also connected with described heat exchanger, described heat exchanger also with described flue gas waste heat recovery
Subsystem is connected.
6. the method for cooperateing with governing system using the coking energy coupling optimization described in any one of claim 1~5 and pollutant,
Characterized in that, by the red burnt sensible heat in coking by coke oven technique, crude-gas sensible heat grade heat different with fume afterheat, with steam
It is medium, includes same energy system and integrated, realizes that energy is reclaimed and cascade utilization step by step；By cock-oven gas purifying and Jiao
The energy that the volatile organic matter of change groove tank area alignment is rich in carries out coupling optimization, realizes the maximization of energy utilization efficiency
Collaboration with pollutant is administered.
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| CN106918029B (en) | 2023-08-01 |
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