CN106969339A - Integrated power generation system based on coke-oven plant's heat recovery - Google Patents
Integrated power generation system based on coke-oven plant's heat recovery Download PDFInfo
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- CN106969339A CN106969339A CN201710352836.1A CN201710352836A CN106969339A CN 106969339 A CN106969339 A CN 106969339A CN 201710352836 A CN201710352836 A CN 201710352836A CN 106969339 A CN106969339 A CN 106969339A
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- 238000011084 recovery Methods 0.000 title claims abstract description 89
- 238000010248 power generation Methods 0.000 title claims description 17
- 239000000571 coke Substances 0.000 claims abstract description 210
- 239000007789 gas Substances 0.000 claims abstract description 123
- 238000010791 quenching Methods 0.000 claims abstract description 98
- 230000000171 quenching effect Effects 0.000 claims abstract description 98
- 239000002918 waste heat Substances 0.000 claims abstract description 75
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 59
- 239000003245 coal Substances 0.000 claims description 19
- 238000013459 approach Methods 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 7
- 235000014171 carbonated beverage Nutrition 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 5
- 239000003546 flue gas Substances 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 claims description 4
- 238000009834 vaporization Methods 0.000 claims description 4
- 230000008016 vaporization Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims 1
- 230000008020 evaporation Effects 0.000 claims 1
- 238000010025 steaming Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 10
- 238000004939 coking Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000003763 carbonization Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 230000009102 absorption Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000006392 deoxygenation reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- CUZMQPZYCDIHQL-VCTVXEGHSA-L calcium;(2s)-1-[(2s)-3-[(2r)-2-(cyclohexanecarbonylamino)propanoyl]sulfanyl-2-methylpropanoyl]pyrrolidine-2-carboxylate Chemical compound [Ca+2].N([C@H](C)C(=O)SC[C@@H](C)C(=O)N1[C@@H](CCC1)C([O-])=O)C(=O)C1CCCCC1.N([C@H](C)C(=O)SC[C@@H](C)C(=O)N1[C@@H](CCC1)C([O-])=O)C(=O)C1CCCCC1 CUZMQPZYCDIHQL-VCTVXEGHSA-L 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
-
- 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
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/005—After-treatment of coke, e.g. calcination desulfurization
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Coke Industry (AREA)
Abstract
The invention provides a kind of heat power generating system based on coke-oven plant's heat recovery, including：Coke oven, coke dry quenching furnace, dry coke quenching residual heat boiler, raw coke oven gas waste-heat recovery device, stack gases waste-heat recovery device, drum, forced circulation pump, steam turbine and generator, forced circulation loop is formed between drum and the stack gases waste-heat recovery device and raw coke oven gas waste-heat recovery device, the saturated vapor that the drum is isolated is overheated in the dry coke quenching residual heat boiler, subsequently into the steam turbine, drive the steam turbine to do work and drive electrical power generators.The present invention can carry out comprehensive integration recovery to the coke sensible heat, crude-gas sensible heat and stack gases sensible heat produced in coke dry quenching furnace production technology and be generated electricity for driving steam turbine, compared with the pattern that three kinds of traditional residual heat resources are individually reclaimed, system is greatly simplified, construction cost is greatly reduced, and the overall efficiency of residual neat recovering system is obviously improved.
Description
Technical field
Field is utilized the present invention relates to coking industry waste heat of coke oven, specifically, more particularly to one kind can be to coke oven area
The integrated generation system based on coke-oven plant's heat recovery that the waste heat that domain is produced in coking is reclaimed and recycled
System.
Background technology
Coke oven, coke oven in other words, refer under normal conditions it is a kind of with refractory material build city be used for make coal carbonization,
Equipment to produce coke, is the main Thermal Equipment of coking.In coke oven the main production of coke be using coal as raw material,
Under conditions of isolation cut-in without ball, coal is heated to 950 degrees Celsius to 1050 degrees Celsius, drying, pyrolysis, melting, bonding,
The high temperature distillation process such as solidification, contraction, finally give coke.
In above process, the heating process in production process in coke oven produces substantial amounts of raw coke oven gas, a large amount of raw coke oven gas tools
There is considerable sensible heat, meanwhile, produce the coke obtained and all have substantial amounts of sensible heat in the flue gas obtained in production.In energy
It is aobvious to crude-gas sensible heat, coke sensible heat and stack gases under the prior art that source problem and production cost management and control increasingly sharpen
The waste heat recovery of heat turns into the emphasis problem of coking industry common concern.
In the prior art, to the above-mentioned three kinds of sensible heats referred to, corresponding mode carries out waste heat recovery：
1) coke sensible heat：After the completion of high-temperature retorting technique in process of coking as previously described, obtain temperature and taken the photograph 950
Red Jiao of the coke of family name's degree to 1050 degrees Celsius, referred to as high temperature, for the ease of transporting and storing, it is necessary to enter to described red Jiao of high temperature
Row cooling, makes its temperature be down to 250 degrees centigrades, the process is referred to as quenching.Quenching can be divided into stove puts out outside quenching and stove
Jiao, with the development of coking technology, nowadays many by the way of the outer quenching of stove, the outer quenching of stove can be divided into CDQ and wet again
Method quenching, that is, the dry coke quenching being commonly called as and coke wet quenching.
Wet method of putting out is to be conveyed directly to high temperature red Jiao to be provided with multiple spray heads at the top of quenching tower, quenching tower, from spray
A large amount of water at low temperature are sprayed in water drenching head, low temperature Water spray reaches on red Jiao of high temperature to be produced largely in cooling effect, cooling procedure
Steam, then these steam are reclaimed by other means；The process of dry coke quenching, then be to be carried with circulated inert gas as heat
Body, coke cooling chamber is inputted by circulating fan by cold recyclegas, and high-temperature coke is cooled to after 250 degrees Celsius and discharged, and
And the recyclegas warp that the gas after coke sensible heat is imported after boiler progress recovery heat, generation steam, recovery heat will be absorbed
After supercooling, dedusting, then cooling chamber is returned to by blower fan cooled down again, so circulation.
2) crude-gas sensible heat：Generally used under prior art, the pipe such as tedge, bridge tube is set at the top of carbonization chamber
Road, is pooled to carbonization chamber headroom, and import by these pipelines by the raw coke oven gas produced during carbonization chamber high-temperature retorting
In dry pipe, then, using the mode of ammonia spray, by raw coke oven gas of the temperature in 650 degrees Celsius to 800 degree Celsius ranges
It is cooled to 85 degrees centigrades.In this approach, the heat of raw coke oven gas is not recycled utilization, causes the huge wave of heat
Take.
3) stack gases sensible heat：The stack gases temperature produced in being produced due to coke oven is relatively low, and temperature is generally Celsius 240
Spend in the range of 280 degrees Celsius, belong to low grade heat energy.Single waste-heat recovery device is generally set to enter low grade heat energy
Row reclaims and produces low-pressure saturated steam, but the value of the low-pressure saturated steam of production is relatively low, and to low grade heat energy
Required heat-energy recovering apparatus cost is again higher, so, the processing mode for stack gases sensible heat is typically direct discharge.
In summary, the recycling of STRENGTH ON COKE sensible heat, crude-gas sensible heat and stack gases sensible heat is all in the prior art
Using independent process, the mode individually reclaimed, heat recovery rate is relatively low, and covers reclaimer more, can undoubtedly bring and is
The increase for complexity, construction costs and the operating cost of uniting.
In view of this, a kind of new mode should be provided, to the various sensible heat heat energy produced in coke dry quenching furnace production technology
Carry out integrated recycling.
The content of the invention
In order to solve the above-mentioned technical problem the present invention makes, and the purpose is to provide one kind to give birth to coke dry quenching furnace
The coke sensible heat, crude-gas sensible heat and the stack gases sensible heat that are produced in production. art carry out the thermal power generation system of comprehensive reutilization
The various residual heat resources in coke-oven plant are planned as a whole by system, simplify the complexity in system, a variety of waste heats are entered in the most optimal way
The integrated recycling of row.
To achieve these goals, the invention provides a kind of integrated generation system based on coke-oven plant's heat recovery
System, system includes coke oven, coke dry quenching furnace, dry coke quenching residual heat boiler, raw coke oven gas waste-heat recovery device, stack gases waste heat recovery dress
Put, drum, forced circulation pump, steam turbine and generator, wherein, the coke oven passes through tedge and returned with the raw coke oven gas waste heat
Receiving apparatus is connected, and the raw coke oven gas produced in the coke oven production is discharged from the top of the coke oven, and is drained into more than the raw coke oven gas
In heat reclamation device, the raw coke oven gas waste-heat recovery device absorbs the sensible heat of the raw coke oven gas；The coke export of the coke oven with
The coke inlet connection of the coke dry quenching furnace, the high-temperature coke of the coke oven production, which is sent in the coke dry quenching furnace, to be cooled down；Jiao
The stack gases that stove production is produced are discharged in the stack gases waste-heat recovery device, the stack gases waste-heat recovery device
The sensible heat of the stack gases is absorbed, the drum is followed by down-comer and the inlet communication of forced circulation pump, the pressure
The outlet of ring pump connects with the water inlet of the stack gases waste-heat recovery device, and the stack gases waste-heat recovery device goes out
The mouth of a river is connected with the water inlet of the raw coke oven gas waste-heat recovery device, and the steam water interface of the raw coke oven gas waste-heat recovery device goes out
Mouthful connect with the rising mouth of pipe of the drum, the hot water of the drum after forced circulation pump pressurizes elder generation more than the stack gases
Once exchanged heat in heat reclamation device, then carry out secondary heat exchange, raw coke oven gas waste heat recovery in raw coke oven gas waste-heat recovery device
The steam water interface that device comes out returns to drum, makes the drum and the raw coke oven gas waste-heat recovery device and the stack gases
Constituted between waste-heat recovery device and force steam/water circulating loop；The gas approach of the dry coke quenching residual heat boiler and the coke dry quenching furnace
On recyclegas outlet, the recyclegas import in the exhanst gas outlet of the dry coke quenching residual heat boiler and the coke dry quenching furnace
Connection, forms circulation loop, and the dry coke quenching residual heat boiler is reclaimed to the sensible heat of the recyclegas；The drum and institute
State dry coke quenching residual heat boiler to be connected, superheater, evaporator and economizer, the pot are provided with the dry coke quenching residual heat boiler
Steam/water circulating loop is formed between cylinder and the evaporator, the saturated vapor of the drum outlet, which enters in the superheater, to be carried out
Overheat, the venthole of the superheater is connected with the air intake of the steam turbine, and the steam turbine is connected with the generator, its
In,
During the system operation production, the high-temperature coke of the coke oven output is pushed into the coke dry quenching furnace
The dry cooling medium put out in cooling, the coke dry quenching furnace of row is recyclegas, after the recyclegas absorption heat, dry is put out from described
The recyclegas outlet of stove is discharged, and introduces the gas approach of the dry coke quenching residual heat boiler by pipeline, by the overheat
Cool, discharged from the exhanst gas outlet of the dry coke quenching residual heat boiler, then pass through pipe after device, evaporator and economizer heat exchange
Road returns to the recyclegas import of the coke dry quenching furnace, so circulation；A part of saturation water in the drum enters described dry
The evaporator in quenching waste heat boiler, returns to the drum after heated vaporization, forms steam/water circulating loop, some
Saturation water delivers to the stack gases waste-heat recovery device and the raw coke oven gas waste-heat recovery device by forced circulation pump successively
Exchanged heat, the steam water interface of formation returns to drum, forms another road steam/water circulating loop；The saturation that the drum is isolated
Steam is overheated into the dry coke quenching residual heat boiler, subsequently into the air intake of the steam turbine, drives the steam turbine
Do work and drive the electrical power generators.
Preferably, in the dry coke quenching residual heat boiler, the superheater includes high-pressure superheater and low-pressure superheater, institute
Stating evaporator includes high pressure evaporator and low pressure evaporator, and the economizer includes high-pressure economizer and low-pressure coal saver.
It is high-pressure superheater, high pressure evaporator, high-pressure economizer, low it is further preferred that in the dry coke quenching residual heat boiler
Pressure superheater, low pressure evaporator, low-pressure coal saver are set gradually according to flue gas flow direction.
Still further preferably, the drum includes high pressure drum and low pressure drum.
Preferably, the air intake of the high-pressure superheater is connected with the venthole of the high pressure drum, the high pressure superheater
The venthole of device is connected with the main air intake of the steam turbine；The water inlet and venthole of the high pressure evaporator are respectively under
Drop pipe and tedge are connected with the high pressure drum, form high pressure carbonated drink natural convection loop；The water inlet of the high-pressure economizer
Mouthful connected with the delivery port of the low pressure drum, be provided with feed pump on connecting pipeline, the delivery port of the high-pressure economizer and
The water inlet connection of the high pressure drum.
Preferably, the air intake of the low-pressure superheater is connected with the low pressure drum, and the low-pressure superheater goes out vapour
Mouth is connected with the filling mouth of the steam turbine；The water inlet and venthole of the low pressure evaporator pass through down-comer and rising respectively
Pipe is connected with the low pressure drum, forms low pressure vapor natural convection loop.
Preferably, condenser, the air intake of the condenser and the steamer are provided with the steam drain of the steam turbine
The steam drain connection of machine, the water inlet of the delivery port of the condenser successively with condensate pump, the low-pressure coal saver is connected.
Preferably, oxygen-eliminating device, the water inlet of the oxygen-eliminating device and the low-pressure coal saver are provided with the low pressure drum
Delivery port connection.
Preferably, the system also includes the first deduster and the second deduster, and first deduster is arranged on described
On the pipeline that the recyclegas outlet of coke dry quenching furnace is connected with the gas approach of the dry coke quenching residual heat boiler, second deduster
It is described on the pipeline for being arranged on the exhanst gas outlet of the dry coke quenching residual heat boiler and the recyclegas inlet communication of the coke dry quenching furnace
Circulating fan is additionally provided between second deduster and the recyclegas import of the coke dry quenching furnace.
Understood as described above with practice, the integrated generation of the present invention based on coke-oven plant's heat recovery
System, is integrated back to the coke sensible heat, crude-gas sensible heat and stack gases sensible heat produced in coke dry quenching furnace production technology
Receive and utilize, respectively by dry coke quenching residual heat boiler, raw coke oven gas waste-heat recovery device, stack gases waste-heat recovery device to more than three kinds
Thermal resource is reclaimed, and the progress of waste heat recovery therrmodynamic system is highly integrated, and according to heat source characteristic, by a whole set of boiler circuit
High pressure, low pressure two systems are designed to, the optimization design of therrmodynamic system is fully carried out based on the second law of thermodynamics, passes through flue gas
Heat quality is matched with carbonated drink grade, realizes the step Optimum utilization of smoke heat energy, and coke oven region residual heat resources
The limit is reclaimed.The present invention only sets a steam turbine to digest high pressure, the steam resource of two grades of low pressure, greatly reduces
The cost of investment of coke oven region afterheat generating system, and diffusing for low-pressure steam resource is avoided, realize the maximum of resource
Change and utilize.Present invention optimizes dry coke quenching residual neat recovering system, coke oven coke oven uprising tube raw coke oven gas residual neat recovering system and coke oven cigarette
The pattern that road waste gas afterheat recovery system is independently arranged, is returned to dry coke quenching residual neat recovering system, coke oven coke oven uprising tube raw coke oven gas waste heat
Receipts system, the therrmodynamic system of stack gases residual neat recovering system carry out height coupling, enormously simplify boiler circuit so that a whole set of
Heat power generating system is more succinct, and project occupation of land area and construction totle drilling cost are greatly reduced.Because three kinds of residual heat resources are
Produced simultaneously with coke oven production technology, therefore the present invention has good exploitativeness and actual application value.
Brief description of the drawings
Fig. 1 is schematic diagram, shows the integrated power generation system of the present invention based on coke-oven plant's heat recovery
Structure；
Fig. 2 is schematic diagram, is shown in the integrated power generation system recycled based on coke-oven plant's residual heat resources shown in Fig. 1
Dry coke quenching residual heat boiler in structure.
Embodiment
The integrated power generation system of the present invention based on coke-oven plant's heat recovery described below with reference to the accompanying drawings
Embodiment.One of ordinary skill in the art will recognize, without departing from the spirit and scope of the present invention, can
To be modified with a variety of modes to described embodiment.Therefore, accompanying drawing and description are inherently illustrative,
It is not intended to limit the scope of the claims.In addition, in this manual, accompanying drawing is drawn not in scale, and it is identical
Reference represent identical part.
Fig. 1 is schematic diagram, shows the integrated power generation system of the present invention based on coke-oven plant's heat recovery
Structure.Fig. 2 is schematic diagram, is shown in the integrated power generation system recycled based on coke-oven plant's residual heat resources shown in Fig. 1
Structure in dry coke quenching residual heat boiler.It is of the present invention based on the integrated of coke-oven plant's heat recovery referring to Fig. 1 and Fig. 2
Electricity generation system include coke oven 1, coke dry quenching furnace 2, disposable dust remover 3, dry coke quenching residual heat boiler 4, secondary filter 5, circulating fan 6,
Raw coke oven gas waste-heat recovery device 7, stack gases waste-heat recovery device 8, steam turbine 9, generator 10, condenser 11, condensate pump
12nd, oxygen-eliminating device 13, low pressure drum 14, feed pump 15, high pressure drum 16 and forced circulation pump 17.
The coke export of coke oven 1 is connected with the coke inlet of coke dry quenching furnace 2, and the high-temperature coke of output is sent to dry in coke oven 1
Put out and (as shown by arrows in FIG.) is cooled down in stove 2.The bottom side of coke oven 1 is provided with stack gases waste-heat recovery device, burnt
The top of stove 1 is provided with raw coke oven gas waste-heat recovery device.Wherein, the exhanst gas outlet of coke oven 1 and stack gases waste-heat recovery device 8
It is connected, the stack gases that coke oven 1 is produced are discharged in stack gases waste-heat recovery device 8, the stack gases waste heat recovery dress
Put the sensible heat of the 8 absorptions stack gases；The raw coke oven gas outlet of coke oven 1 is connected with raw coke oven gas waste-heat recovery device 7, in coke oven 1
The raw coke oven gas of generation, is drained into by tedge and is cooled down in raw coke oven gas waste-heat recovery device, the raw coke oven gas waste heat recovery dress
Put the sensible heat of the 7 absorptions raw coke oven gas.
Low pressure drum 14 is connected by down-comer with the import of forced circulation pump 17, the outlet of forced circulation pump 17 and flue
The water inlet of waste gas afterheat recovery unit 8 is connected, and delivery port and the raw coke oven gas waste heat recovery of stack gases waste-heat recovery device 8 are filled
The water inlet for putting 7 is connected, the steam water interface outlet of raw coke oven gas waste-heat recovery device 7 and the rising mouth of pipe phase of low pressure drum 14
Even, so, low pressure is constituted between low pressure drum 14 and stack gases waste-heat recovery device 8 and raw coke oven gas waste-heat recovery device 7
Carbonated drink forced circulation loop.
The gas approach 41 of dry coke quenching residual heat boiler 4 is connected with the recyclegas outlet 21 in coke dry quenching furnace 2, dry coke quenching waste heat
The exhanst gas outlet 42 of boiler 4 is connected with the recyclegas import 22 in coke dry quenching furnace 2, forms circulation loop, the recyclegas
Sensible heat is reclaimed in dry coke quenching residual heat boiler 4；In addition, recyclegas outlet 21 and the dry coke quenching residual heat boiler 4 of coke dry quenching furnace 2
Gas approach 41 connect pipeline on be provided with the first deduster 3, the exhanst gas outlet 42 and coke dry quenching furnace of dry coke quenching residual heat boiler 4
It is provided with the pipeline that 2 recyclegas import 22 is connected between the second deduster 5, and the second deduster 5 and coke dry quenching furnace 2 also
It is provided with circulating fan 6.
Drum is connected with dry coke quenching residual heat boiler 4, and superheater, evaporator and province are provided with dry coke quenching residual heat boiler 4
Coal device, by down-comer and tedge formation steam/water circulating loop between drum and evaporator, the saturated vapor that drum is isolated
Overheated in into the superheater, the venthole of the superheater is connected with the air intake of steam turbine 9, steam turbine 9 and hair
Motor 10 is connected.Specifically, in this embodiment of the invention, drum includes low pressure drum 14 and high pressure drum 16, dry to put out
In coke waste heat boiler 4, superheater includes high-pressure superheater 43 and low-pressure superheater 46, and evaporator includes high pressure evaporator 44 and low
Press evaporator 47, economizer include high-pressure economizer 45 and low-pressure coal saver 48, wherein, in dry coke quenching residual heat boiler 4 according to from
Its gas approach 41 arrives the direction of exhanst gas outlet 42, has been sequentially arranged high-pressure superheater 43, high pressure evaporator 44, high-pressure economizer
46th, low-pressure superheater 46, low pressure evaporator 47 and low-pressure coal saver 48.
The air intake 432 of high-pressure superheater 43 connects with the venthole 161 of high pressure drum 16, and high-pressure superheater 43 goes out vapour
Mouth 431 is connected with the main steam ports 91 of steam turbine 9；The water inlet 442 and venthole 441 of high pressure evaporator 44 are respectively by declining
Pipe and tedge are connected with high pressure drum 16, form high pressure carbonated drink natural convection loop；The water inlet 462 of high-pressure economizer 46 with
Feed pump 15, the delivery port 461 and high pressure of high-pressure economizer 46 are provided with the delivery port connection of low pressure drum 14, connecting pipeline
The water inlet 162 of drum 16 is connected.The venthole 461 of low-pressure superheater 46 is connected with the filling mouth 92 of steam turbine 9, low area overheat
The air intake 462 of device 46 is connected with low pressure drum 14；The water inlet 472 and venthole 471 of low pressure evaporator 47 are respectively under
Drop pipe and tedge are connected with low pressure drum 14, form low pressure vapor natural convection loop.
It is provided with low pressure drum 14 at oxygen-eliminating device 13, the steam drain 93 of steam turbine 9 and is provided with condenser 11, condenser
11 air intake 112 is connected with the steam drain 93 of steam turbine 9, and the delivery port 111 of condenser 11 passes through condensate pump 12 and low pressure
The water inlet 482 of economizer 48 is connected, and the water inlet of oxygen-eliminating device 13 is connected with the delivery port 481 of low-pressure coal saver 48.
As described above, the recyclegas in coke dry quenching furnace 2 enters in dry coke quenching residual heat boiler 4, successively by high-pressure superheater
43rd, after high pressure evaporator 44, high-pressure economizer 45, low-pressure superheater 46, low pressure evaporator 47, low-pressure coal saver 48 exchange heat, from
The exhanst gas outlet 42 of dry coke quenching residual heat boiler 4 is discharged, and is back in coke dry quenching furnace 2.Meanwhile, low pressure drum 14 and high pressure drum 16
Steam-water separation is carried out to the steam water interface of different pressures grade respectively, and the steam isolated is delivered into dry coke quenching waste heat respectively
Overheated in boiler, be ultimately delivered to steam turbine 9.Specifically, a part of saturation water in low pressure drum 14 steams into low pressure
Device 47 is sent out, low pressure drum 14 is returned after vaporization of being heated, forms low pressure vapor circulation loop all the way, another part saturation water passes through strong
Circulating pump 17 processed delivers to stack gases waste-heat recovery device 8 successively and raw coke oven gas waste-heat recovery device 7 carries out classification heat exchange, is formed
Steam water interface return to drum, form another road low pressure vapor circulation loop；Saturation water in high pressure drum 16 enters high pressure
Evaporator 44, returns to high pressure drum 16 after vaporization of being heated, forms high pressure steam/water circulating loop.The venthole of high pressure drum 16 and height
The air intake of superheater 43 is pressed to be connected, the high-pressure saturated steam that high pressure drum 16 is isolated was carried out in high-pressure superheater 43
Heat, is then fed into the main steam ports 91 of steam turbine 9, is used as the main driving steam of steam turbine；The venthole and low pressure of low pressure drum 14
The air intake of superheater 46 is connected, and the low-pressure saturated steam that low pressure drum 14 is isolated is overheated in low-pressure superheater 46,
The gas supplementing opening 92 of steam turbine 9 is then fed into, the supplement vapour source of steam turbine is used as.The steam turbine 9 and the generator 10 are coaxial
It is connected, drives the electrical power generators.The steam discharge of steam turbine 9 enters condenser 11, condensate is condensed into condenser 11, so
Pressurizeed afterwards by condensate pump 12 and deliver to low-pressure coal saver 48, condensate sends into oxygen-eliminating device after being preheated in low-pressure coal saver 48
13.Oxygen-eliminating device 13 is arranged on the top of low pressure drum 14, and a part of saturated vapor that low pressure drum 14 is isolated enters oxygen-eliminating device 13,
Thermal de-aeration is carried out to the condensate of low-pressure coal saver 48, the water after deoxygenation falls into low pressure drum 14, and low pressure drum 14 is doubled as
Deoxygenation water tank, so as to complete a whole set of thermal de-aeration process.
Understood as described above with practice, the integrated generation of the present invention based on coke-oven plant's heat recovery
System, is integrated back to the coke sensible heat, crude-gas sensible heat and stack gases sensible heat produced in coke dry quenching furnace production technology
Receive and utilize, respectively by dry coke quenching residual heat boiler, raw coke oven gas waste-heat recovery device, stack gases waste-heat recovery device to more than three kinds
Thermal resource is reclaimed, and the progress of waste heat recovery therrmodynamic system is highly integrated, and according to heat source characteristic, by a whole set of boiler circuit
High pressure, low pressure two systems are designed to, the optimization design of therrmodynamic system is fully carried out based on the second law of thermodynamics, passes through flue gas
Heat quality is matched with carbonated drink grade, realizes the step Optimum utilization of smoke heat energy, and coke oven region residual heat resources
The limit is reclaimed.The present invention only sets a steam turbine to digest high pressure, the steam resource of two grades of low pressure, greatly reduces
The cost of investment of coke oven region afterheat generating system, and diffusing for low-pressure steam resource is avoided, realize the maximum of resource
Change and utilize.Present invention optimizes dry coke quenching residual neat recovering system, coke oven coke oven uprising tube raw coke oven gas residual neat recovering system and coke oven cigarette
The pattern that road waste gas afterheat recovery system is independently arranged, is returned to dry coke quenching residual neat recovering system, coke oven coke oven uprising tube raw coke oven gas waste heat
Receipts system, the therrmodynamic system of stack gases residual neat recovering system carry out height coupling, enormously simplify boiler circuit so that a whole set of
Heat power generating system is more succinct, and project occupation of land area and construction totle drilling cost are greatly reduced.Because three kinds of residual heat resources are
Produced simultaneously with coke oven production technology, therefore the present invention has good exploitativeness and actual application value.
Described in an illustrative manner above with reference to accompanying drawing and be based on coke-oven plant's heat recovery according to of the present invention
Integrated power generation system.It will be understood by those skilled in the art, however, that for the invention described above proposed based on more than coke-oven plant
The integrated power generation system that recuperation of heat is utilized, can also make various improvement on the basis of present invention is not departed from.Therefore, originally
The protection domain of invention should be determined by the content of appended claims.
Claims (9)
1. a kind of integrated power generation system based on coke-oven plant's heat recovery, it is characterised in that system includes coke oven, dry put out
Stove, dry coke quenching residual heat boiler, raw coke oven gas waste-heat recovery device, stack gases waste-heat recovery device, drum, forced circulation pump, vapour
Turbine and generator, wherein,
The coke oven is connected by tedge with the raw coke oven gas waste-heat recovery device, the raw coke oven gas produced in the coke oven production
Discharge, and drained into the raw coke oven gas waste-heat recovery device from the top of the coke oven, the raw coke oven gas waste-heat recovery device is inhaled
Receive the sensible heat of the raw coke oven gas；
The coke export of the coke oven is connected with the coke inlet of the coke dry quenching furnace, and the high-temperature coke of the coke oven production is sent to
Cooled down in the coke dry quenching furnace；
The stack gases that the coke oven production is produced are discharged in the stack gases waste-heat recovery device, more than the stack gases
Heat reclamation device absorbs the sensible heat of the stack gases；
The drum is given up by down-comer and the inlet communication of forced circulation pump, the outlet of the forced circulation pump with the flue
The water inlet connection of gas waste-heat recovery device, the delivery port of the stack gases waste-heat recovery device is returned with the raw coke oven gas waste heat
The water inlet connection of receiving apparatus, the steam water interface outlet of the raw coke oven gas waste-heat recovery device and the rising mouth of pipe of the drum
Connection, the hot water that the drum comes first once is changed after forced circulation pump pressurizes in stack gases waste-heat recovery device
Heat, then carries out secondary heat exchange in raw coke oven gas waste-heat recovery device, and the steam water interface that raw coke oven gas waste-heat recovery device comes out is returned
Twice-cooked stir-frying cylinder, makes to constitute by force between the drum and the raw coke oven gas waste-heat recovery device and the stack gases waste-heat recovery device
Steam/water circulating loop processed；
Recyclegas outlet in the gas approach of the dry coke quenching residual heat boiler and the coke dry quenching furnace, more than the dry coke quenching
The exhanst gas outlet of heat boiler and the recyclegas inlet communication in the coke dry quenching furnace, form circulation loop, the dry coke quenching waste heat
Boiler is reclaimed to the sensible heat of the recyclegas；
The drum is connected with the dry coke quenching residual heat boiler, and superheater, evaporator are provided with the dry coke quenching residual heat boiler
And economizer, steam/water circulating loop is formed between the drum and the evaporator, the saturated vapor of the drum outlet enters
Enter and overheated in the superheater, the venthole of the superheater is connected with the air intake of the steam turbine, the steam turbine
It is connected with the generator, wherein,
During the system operation production, the high-temperature coke of the coke oven output, which is pushed into the coke dry quenching furnace, to be done
It is recyclegas to put out the cooling medium in cooling, the coke dry quenching furnace, and the recyclegas is absorbed after heat, from the coke dry quenching furnace
Recyclegas outlet is discharged, and introduces the gas approach of the dry coke quenching residual heat boiler by pipeline, by the superheater, steaming
Cool, discharged from the exhanst gas outlet of the dry coke quenching residual heat boiler, then sent by pipeline after hair device and economizer heat exchange
The recyclegas import of the coke dry quenching furnace is back to, so circulation；
The evaporator that a part of saturation water in the drum enters in the dry coke quenching residual heat boiler, is returned after heated vaporization
The drum is returned, steam/water circulating loop is formed, some saturation water is delivered to the flue by forced circulation pump and given up successively
Gas waste-heat recovery device and the raw coke oven gas waste-heat recovery device are exchanged heat, and the steam water interface of formation returns to drum, is formed
Another road steam/water circulating loop；
The saturated vapor that the drum is isolated is overheated into the dry coke quenching residual heat boiler, subsequently into the steam turbine
Air intake, drive the steam turbine to do work and drive the electrical power generators.
2. the integrated power generation system as claimed in claim 1 based on coke-oven plant's heat recovery, it is characterised in that described dry
In quenching waste heat boiler, the superheater includes high-pressure superheater and low-pressure superheater, and the evaporator includes high-pressure evaporation
Device and low pressure evaporator, the economizer include high-pressure economizer and low-pressure coal saver.
3. the integrated power generation system as claimed in claim 2 based on coke-oven plant's heat recovery, it is characterised in that described dry
In quenching waste heat boiler, high-pressure superheater, high pressure evaporator, high-pressure economizer, low-pressure superheater, low pressure evaporator, low pressure are saved
Coal device is set gradually according to flue gas flow direction.
4. the integrated power generation system as claimed in claim 3 based on coke-oven plant's heat recovery, it is characterised in that the pot
Cylinder includes high pressure drum and low pressure drum.
5. the integrated power generation system as claimed in claim 4 based on coke-oven plant's heat recovery, it is characterised in that the height
The air intake of pressure superheater is connected with the venthole of the high pressure drum, the venthole of the high-pressure superheater and the steam turbine
Main air intake connection；The water inlet and venthole of the high pressure evaporator pass through down-comer and tedge and the high pressure respectively
Drum is connected, and forms high pressure carbonated drink natural convection loop；The water outlet of the water inlet of the high-pressure economizer and the low pressure drum
Feed pump is provided with mouth connection, connecting pipeline, the water inlet of the delivery port of the high-pressure economizer and the high pressure drum connects
It is logical.
6. the integrated power generation system as claimed in claim 4 based on coke-oven plant's heat recovery, it is characterised in that described low
The air intake of pressure superheater is connected with the low pressure drum, the filling mouth of the venthole of the low-pressure superheater and the steam turbine
Connection；The water inlet and venthole of the low pressure evaporator are connected by down-comer and tedge with the low pressure drum respectively,
Form low pressure vapor natural convection loop.
7. the integrated power generation system as claimed in claim 3 based on coke-oven plant's heat recovery, it is characterised in that the vapour
Condenser is provided with the steam drain of turbine, the air intake of the condenser is connected with the steam drain of the steam turbine, it is described solidifying
Water inlet of the delivery port of vapour device successively with condensate pump, the low-pressure coal saver is connected.
8. the heat power generating system as claimed in claim 4 based on coke-oven plant's heat recovery, it is characterised in that described low
Oxygen-eliminating device is provided with pressure drum, the water inlet of the oxygen-eliminating device is connected with the delivery port of the low-pressure coal saver.
9. the heat power generating system as claimed in claim 1 based on coke-oven plant's heat recovery, it is characterised in that the system
System also include the first deduster and the second deduster, first deduster be arranged on the coke dry quenching furnace recyclegas outlet with
On the pipeline of the gas approach connection of the dry coke quenching residual heat boiler, second deduster is arranged on the dry coke quenching waste heat pot
On the pipeline of the exhanst gas outlet of stove and the recyclegas inlet communication of the coke dry quenching furnace, second deduster and the coke dry quenching furnace
Recyclegas import between be additionally provided with circulating fan.
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| CN108036289A (en) * | 2017-12-19 | 2018-05-15 | 黑龙江建龙化工有限公司 | The method of comprehensive utilization of waste heat of coke-oven flue gas, raw coke oven gas waste heat and dry coke quenching waste heat |
| CN113048797A (en) * | 2021-03-11 | 2021-06-29 | 秦皇岛市国阳钢铁有限公司 | Device and method for recovering tail gas heat of billet heating furnace |
| CN113804006A (en) * | 2021-09-17 | 2021-12-17 | 华泰永创(北京)科技股份有限公司 | Coke oven flue waste heat recovery system |
| CN114060824A (en) * | 2021-10-15 | 2022-02-18 | 北京首创环境科技有限公司 | Waste incineration waste heat recovery system and waste incineration system |
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Application publication date: 20170721 |