CN107013269A - The heat power generating system recycled based on coke-oven plant's residual heat resources - Google Patents
The heat power generating system recycled based on coke-oven plant's residual heat resources Download PDFInfo
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- CN107013269A CN107013269A CN201710353509.8A CN201710353509A CN107013269A CN 107013269 A CN107013269 A CN 107013269A CN 201710353509 A CN201710353509 A CN 201710353509A CN 107013269 A CN107013269 A CN 107013269A
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- 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
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- 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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
- F01K7/18—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbine being of multiple-inlet-pressure type
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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
- F22B1/04—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being hot slag, hot residues, or heated blocks, e.g. iron blocks
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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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- 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
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Coke Industry (AREA)
Abstract
The invention provides a kind of heat power generating system recycled based on coke-oven plant's residual heat resources, including：High-pressure superheater, high pressure evaporator, middle pressure superheater, high-pressure economizer, low-pressure superheater, low pressure evaporator and low-pressure coal saver are disposed with coke oven, coke dry quenching furnace, raw coke oven gas waste-heat recovery device, stack gases waste-heat recovery device and dry coke quenching residual heat boiler and first, second drum, the dry coke quenching residual heat boiler.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 heating power hair recycled based on coke-oven plant's residual heat resources that the waste heat that domain is produced in coking is reclaimed and recycled
Electric 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 shows
Heat：After the completion of high-temperature retorting technique in process of coking as previously described, temperature is obtained at 950 degrees Celsius to 1050 degrees Celsius
Coke, referred to as red Jiao of high temperature, for the ease of transporting and storing, it is necessary to described red Jiao of high temperature is cooled down, makes its temperature
250 degrees centigrades are down to, the process is referred to as quenching.Quenching can be divided into quenching and the outer quenching of stove in stove, with coking technology
Development, by the way of nowadays many outer quenchings using stove, quenching can be divided into CDQ and wet quenching to stove again outside, that is, be commonly called as
Dry coke quenching and coke wet quenching.
It is wet to put out method, it 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, is 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 gas importing boiler progress recovery heat after coke sensible heat will be absorbed, produce steam；Reclaim the recyclegas warp after heat
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
It is then, using the mode of ammonia spray, raw coke oven gas of the temperature in 650 degrees Celsius to 800 degree Celsius ranges is cold in dry pipe
But 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 thermal power generation recycled based on coke-oven plant's residual heat resources
System, system includes：Coke oven；Raw coke oven gas waste-heat recovery device, the waste coal of the raw coke oven gas waste-heat recovery device and the coke oven
Gas outlet；Stack gases retracting device, the stack gases retracting device is connected with the waste gas outlet of the coke oven；It is dry to put out
Stove, the coke inlet of the coke dry quenching furnace is connected by Coke Transport device with the coke export of the coke oven, the heat in the coke oven
Coke is sent to the coke dry quenching furnace and cooled down；Dry coke quenching residual heat boiler, the gas approach of the dry coke quenching residual heat boiler passes through pipe
Road and the recyclegas outlet of the coke dry quenching furnace, the exhanst gas outlet of dry coke quenching residual heat boiler pass through pipeline and the coke dry quenching furnace
Recyclegas inlet communication, form a circulation loop, be provided with the dry coke quenching residual heat boiler superheater, evaporator with
And economizer, the first drum is provided with the dry coke quenching residual heat boiler, delivery port and the flue of first drum give up
The water inlet connection of gas waste-heat recovery device, feedwater is provided for the stack gases waste-heat recovery device, first drum
Venthole is connected with the air intake of the superheater of the dry coke quenching residual heat boiler；Second drum, the water inlet of the drum passes through pipe
Road is connected with the delivery port of the stack gases waste-heat recovery device, second drum and the raw coke oven gas waste-heat recovery device
Between form steam/water circulating loop, the air intake of the venthole of second drum and the superheater of dry coke quenching residual heat boiler connects
It is logical；Steam turbine, the air intake of the steam turbine is connected by pipeline with the dry coke quenching residual heat boiler, the steam turbine and generator
It is coaxially connected, wherein,
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 enters the gas approach of the dry coke quenching residual heat boiler by pipeline, by the overheat
Cool, and discharged from the exhanst gas outlet of the dry coke quenching residual heat boiler after device, evaporator and economizer heat exchange, then pass through
Pipeline returns to the recyclegas import of the coke dry quenching furnace, so circulation；Evaporator in the dry coke quenching residual heat boiler is produced
Steam water interface enter the first drum, first drum provides feedwater for the stack gases waste-heat recovery device, described
The water outlet of stack gases waste-heat recovery device enters the second drum, and first drum is the stack gases waste-heat recovery device
There is provided feedwater, the steam water interface that the raw coke oven gas waste-heat recovery device is produced enters the second drum, first drum and the
The saturated vapor that two drums are isolated respectively enters the dry coke quenching residual heat boiler and overheated, and the dry coke quenching residual heat boiler goes out
The superheated steam of mouth enters steam turbine, drives steam turbine to do work and generate electricity.
Preferably, in the dry coke quenching residual heat boiler, the superheater includes high-pressure superheater, middle pressure superheater and low
Superheater is pressed, the evaporator includes high pressure evaporator and low pressure evaporator, and the economizer includes high-pressure economizer and low pressure
Economizer.
It is further preferred that in the dry coke quenching residual heat boiler, high-pressure superheater, high pressure evaporator, middle pressure superheater, height
Pressure economizer, low-pressure superheater, low pressure evaporator, low-pressure coal saver are set gradually according to flue gas flow direction.
Further preferably, first drum includes high pressure drum and low pressure drum.
Still further preferably, the air intake of the high-pressure superheater is connected with the venthole of the high pressure drum, described
The venthole of high-pressure superheater is connected with the main air intake of the steam turbine；The water inlet and venthole of the high pressure evaporator point
Do not connected by down-comer and tedge with the high pressure drum, form high pressure carbonated drink natural convection loop；The high pressure saves coal
The water inlet of device is connected with the first delivery port of the low pressure drum, and high pressure water pump, the high pressure are provided with connecting pipeline
The delivery port of economizer is connected with the water inlet of the high pressure drum；The air intake of medium pressure superheater and second drum
Venthole connection, the venthole of medium pressure superheater connects with the first filling mouth of the steam turbine.
It is further preferred that the air intake of the low-pressure superheater is connected with the low pressure drum, the low-pressure superheater
Venthole connected with the second filling mouth of the steam turbine；The water inlet and venthole of the low pressure evaporator are respectively under
Drop pipe and tedge are connected with the low pressure drum, form low pressure vapor natural convection loop.
Still further preferably, be provided with condenser at the steam drain of the steam turbine, the air intake of the condenser with
The steam drain connection of the steam turbine, the water inlet of the delivery port of the condenser successively with condensate pump, the low-pressure coal saver
Mouth connection.
Further preferably, be provided with oxygen-eliminating device on the low pressure drum, the water inlet of the oxygen-eliminating device with it is described low
Press the delivery port connection of economizer.
Preferably, the second delivery port of the water inlet of the stack gases waste-heat recovery device and the low pressure drum connects
It is logical, middle pressure feed pump, the delivery port of the stack gases waste-heat recovery device and second drum are provided with connecting pipeline
Water inlet connection.
Preferably, down-comer and tedge and second drum are passed through described in the raw coke oven gas waste-heat recovery device respectively
Connection, presses carbonated drink natural convection loop in formation.
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 heating power of the present invention recycled based on coke-oven plant's residual heat resources
Electricity generation system, is carried out comprehensive to the coke sensible heat, crude-gas sensible heat and stack gases sensible heat produced in coke dry quenching furnace production technology
Close and recycle, respectively by dry coke quenching residual heat boiler, raw coke oven gas waste-heat recovery device, stack gases waste-heat recovery device to three
Residual heat resources are planted to be reclaimed, and the progress of waste heat recovery therrmodynamic system is highly integrated, and according to heat source characteristic, by a whole set of carbonated drink
System is designed to high, medium and low three pressures system, and the optimization design of therrmodynamic system is fully carried out based on the second law of thermodynamics, is passed through
Smoke heat energy grade is matched with carbonated drink grade, realizes the step Optimum utilization of smoke heat energy, and coke oven region waste heat money
The limit in source is reclaimed.The present invention uses giving young employees remedial-courses in general knowledge and vocational skills vapour formula Turbo-generator Set, only sets a steam turbine to digest three kinds of pressures
The steam resource of power grade, substantially reduces the cost of investment of coke oven region afterheat generating system, and avoids low-pressure steam money
Diffusing for source, realizes maximally utilizing for resource.Present invention optimizes dry coke quenching residual neat recovering system, the waste coal of coke oven coke oven uprising tube
The pattern that gas residual neat recovering system and coke oven flue waste gas afterheat recovery system are independently arranged, to dry coke quenching waste heat recovery system
System, the therrmodynamic system of coke oven coke oven uprising tube raw coke oven gas residual neat recovering system, stack gases residual neat recovering system carry out height coupling, greatly
Simplify boiler circuit greatly so that a whole set of heat power generating system is more succinct, project occupation of land area and construction totle drilling cost are significantly
Reduction.Because three kinds of residual heat resources are produced with coke oven production technology simultaneously, thus it is of the invention with well can be real
The property applied and actual application value.
In summary, coke sensible heat, crude-gas sensible heat and the flue of the invention to being produced in coke dry quenching furnace production technology
Waste gas sensible heat carries out the heat power generating system of comprehensive reutilization, and the various residual heat resources in coke-oven plant are planned as a whole, and simplifies system
A variety of waste heats are carried out integrated recycling by interior complexity in the most optimal way.
Brief description of the drawings
Fig. 1 is schematic diagram, shows the thermal power generation system of the present invention recycled based on coke-oven plant's residual heat resources
The attachment structure of system；
Fig. 2 is schematic diagram, is shown in the heat power generating system recycled based on coke-oven plant's residual heat resources shown in Fig. 1
Dry coke quenching residual heat boiler in structure；
Fig. 3 is schematic diagram, is shown in the heat power generating system recycled based on coke-oven plant's residual heat resources shown in Fig. 1
The production process of part A；
Fig. 4 is schematic diagram, is shown in the heat power generating system recycled based on coke-oven plant's residual heat resources shown in Fig. 1
The production process of part B.
Embodiment
Below with reference to the accompanying drawings come describe it is of the present invention based on coke-oven plant's residual heat resources recycle thermal power generation
The embodiment of system.One of ordinary skill in the art will recognize, in situation without departing from the spirit and scope of the present invention
Under, the described embodiments may be modified in various different ways.Therefore, accompanying drawing and description are inherently explanation
Property, it is not intended to limit the scope of the claims.In addition, in this manual, accompanying drawing is drawn not in scale, and
Identical reference represents identical part.
Fig. 1 is schematic diagram, shows the thermal power generation system of the present invention recycled based on coke-oven plant's residual heat resources
The attachment structure of system.As shown in figure 1, the heat power generating system bag of the present invention recycled based on coke-oven plant's residual heat resources
Coke oven 1, coke dry quenching furnace 2, dry coke quenching residual heat boiler 4, raw coke oven gas waste-heat recovery device 7 and stack gases waste-heat recovery device 8 are included,
Wherein,
The coke inlet of coke dry quenching furnace 2 is connected by Coke Transport device with the coke export of coke oven 1, the high temperature of coke oven 1
Red Jiao is transported to coke dry quenching furnace 2 and cooled down, and the low-temperature coke after cooling is discharged (such as from the coke export of the bottom of coke dry quenching furnace 2
In figure shown in arrow).
Raw coke oven gas waste-heat recovery device 7 is arranged on the top of coke oven 1, and stack gases waste-heat recovery device 8 is arranged on coke oven 1
Bottom side.In this embodiment of the invention, in raw coke oven gas waste-heat recovery device 7, the famine produced in the production process of coke oven 1
Coal gas contains substantial amounts of sensible heat, and raw coke oven gas is entered in raw coke oven gas waste-heat recovery device 7 from the top of coke oven 1 by tedge,
Heat is released in raw coke oven gas waste-heat recovery device 7.Meanwhile, coke oven flue waste gas is discharged from the bottom of coke oven 1, more than stack gases
Heat reclamation device 8, and release heat in stack gases waste-heat recovery device 8.
Gas approach 41 on dry coke quenching residual heat boiler 4 is connected by pipeline with the recyclegas outlet 21 in coke dry quenching furnace 2,
Exhanst gas outlet 42 thereon is connected by pipeline with the recyclegas import 22 of coke dry quenching furnace 2, forms a circulation loop, i.e. dry
Putting out is used in stove 2 after the red burnt inert gas absorption heat of cooling down high-temperature, is discharged into by pipeline in dry coke quenching residual heat boiler 4, and
It is cooled in dry coke quenching residual heat boiler 4, finally discharges dry coke quenching residual heat boiler 4, and is returned in coke dry quenching furnace 2, it is lazy as circulating
Property gas is continuing with, and is circulated with this.In addition, recyclegas outlet 21 and the flue gas of dry coke quenching residual heat boiler 4 of coke dry quenching furnace 2
The first deduster 3, the exhanst gas outlet 42 of dry coke quenching residual heat boiler 4 and following for coke dry quenching furnace 2 are provided with the pipeline that import 41 is connected
It is provided between the second deduster 5, and the second deduster 5 and coke dry quenching furnace 2 and is additionally provided with the pipeline that ring gas feed 22 is connected
Circulating fan 6.
System also includes the first drum, the second drum and steam turbine 9, venthole and the dry coke quenching waste heat pot of the first drum
The air intake connection of the superheater of stove 4, the delivery port of the first drum is connected with the water inlet of stack gases waste-heat recovery device 8,
Feedwater is provided for stack gases waste-heat recovery device 8；The water inlet of second drum is filled by pipeline and stack gases waste heat recovery
The delivery port for putting 8 is connected, and steam/water circulating loop is formed between the second drum and raw coke oven gas waste-heat recovery device 7, the second drum
Venthole is connected with the air intake of the superheater of dry coke quenching residual heat boiler 4；The air intake of steam turbine 9 is by more than pipeline and dry coke quenching
The steam (vapor) outlet connection of the superheater of heat boiler 4, steam turbine 9 is connected with generator coaxle.In this embodiment of the invention,
One drum includes high pressure drum 18 and low pressure drum 14, and the second drum is middle pressure drum 16.High pressure drum 18 and dry coke quenching waste heat
Boiler 4 is connected, and low pressure drum 14 is connected with dry coke quenching residual heat boiler 4, stack gases waste-heat recovery device 8, middle 16 points of drum of pressure
Do not connected with raw coke oven gas waste-heat recovery device 7, stack gases waste-heat recovery device 8 and dry coke quenching residual heat boiler 4.
During the system operation production, the high-temperature coke of the output of coke oven 1, which is pushed into coke dry quenching furnace 2, carries out dry put out
Cooling medium in cooling, coke dry quenching furnace 2 is recyclegas, and recyclegas is absorbed after heat, is exported from the recyclegas of coke dry quenching furnace 2
21 discharge, and enter the gas approach of dry coke quenching residual heat boiler 4 by pipeline, by the superheater, evaporator and province's coal
Cool, and discharged from the exhanst gas outlet 42 of dry coke quenching residual heat boiler 4 after device heat exchange, then coke dry quenching furnace 2 is returned to by pipeline
Recyclegas import 22, so circulation；The steam water interface that evaporator in dry coke quenching residual heat boiler 4 is produced enters first pot
Cylinder, the first drum is that stack gases waste-heat recovery device 8 provides feedwater, and the water outlet of stack gases waste-heat recovery device 8 enters the
Two drums, the first drum is that raw coke oven gas waste-heat recovery device 7 provides feedwater, and the carbonated drink that raw coke oven gas waste-heat recovery device 7 is produced is mixed
Compound enters the second drum, and the saturated vapor that the first drum and the second drum are produced respectively enters dry coke quenching residual heat boiler 4 and carried out
Overheat, the superheated steam of dry coke quenching residual heat boiler outlet enters steam turbine 9, drives steam turbine to do work and generate electricity.
Fig. 2 is schematic diagram, is shown in the heat power generating system recycled based on coke-oven plant's residual heat resources shown in Fig. 1
Dry coke quenching residual heat boiler in structure.In this embodiment of the invention, enter in dry coke quenching residual heat boiler 4 according to from its flue gas
Mouth 41 arrives the direction of exhanst gas outlet 42, is disposed with high-pressure superheater 43, high pressure evaporator 44, middle pressure superheater 45, high pressure
Economizer 46, low-pressure superheater 47, low pressure evaporator 48 and low-pressure coal saver 49.
The attachment structure in dry coke quenching residual heat boiler in the embodiment of the present invention is detailed below.Fig. 3 is schematic diagram,
Show part A production process in the heat power generating system recycled based on coke-oven plant's residual heat resources shown in Fig. 1..Fig. 4 is
Schematic diagram, shows the production of part B in the heat power generating system recycled based on coke-oven plant's residual heat resources shown in Fig. 1
Journey.As shown in Figure 3 and Figure 4, the air intake 432 of high-pressure superheater 43 is connected with the venthole 181 of high pressure drum 18, high pressure superheater
The venthole 431 of device 43 is connected with the main air intake 91 of steam turbine 9；441 points of the water inlet 442 and venthole of high pressure evaporator 44
Do not connected by down-comer and tedge with high pressure drum 18, form high pressure carbonated drink Natural Circulation；The water inlet of high-pressure economizer 46
Mouth 462 is connected with the first delivery port 141 of low pressure drum 14, and high pressure water pump 17, high-pressure economizer are provided with connecting pipeline
46 delivery port 461 is connected with the water inlet 182 of high pressure drum 18；The air intake 452 of middle pressure superheater 45 and middle pressure drum 16
Venthole 161 connect, it is middle pressure superheater 45 venthole 451 connected with the first filling mouth 92 of steam turbine 9.Low-pressure superheater
47 venthole 471 is connected with the second filling mouth 93 of steam turbine 9, air intake 472 and the low pressure drum 14 of low-pressure superheater 47
Connection；The water inlet 482 and venthole 481 of low pressure evaporator 48 are connected by down-comer and tedge with low pressure drum 14 respectively
It is logical, form low pressure vapor natural convection loop.
It is provided with low pressure drum 14 at oxygen-eliminating device 13, the steam drain 94 of steam turbine 9 and is provided with condenser 11, condenser 11
Air intake 112 connected with the steam drain 94 of steam turbine 9, the delivery port 111 of condenser 11 passes through condensate pump 12 and saved with low pressure
The water inlet 492 of coal device 49 is connected, and the water inlet of oxygen-eliminating device 13 is connected with the delivery port 491 of low-pressure coal saver 49, stack gases
The water inlet of waste-heat recovery device 8 is connected with the second water inlet 142 of low pressure drum 14, low pressure drum 14 and stack gases waste heat
Middle pressure feed pump 15 is provided with the loop that retracting device 8 is connected.
In actual production process, the red coke feeding coke dry quenching furnace 2 of high temperature released from the carbonizing chamber of coke oven 1 passes through circulating air
Body is cooled down, and arranged the high temperature circulation gas come after absorption heat in coke dry quenching furnace 2 separates coarse granule by the first deduster 3
After coke powder, heat exchange is carried out into dry coke quenching residual heat boiler 4, is that dry coke quenching residual heat boiler 4 provides thermal source；Dry coke quenching residual heat boiler
The low-temperature circulating gas discharged after 4 absorbing and cooling temperatures passes through blower fan 6 after the further separate fine particles coke powder of the second deduster 5
Pressurization is then returned to the bottom air inlet mouthful of coke dry quenching furnace 2, is continued on for cooling down red Jiao of high temperature to be cooled in coke dry quenching furnace, is formed one
Circulating cooling process.
The raw coke oven gas waste-heat recovery device 7 entered from the raw coke oven gas of the top of coke oven 1 discharge at the top of coke oven, the raw coke oven gas of coke oven 1
Waste-heat recovery device 7 absorbs the sensible heat of raw coke oven gas, and raw gas temperature is reduced into 500 DEG C or so from 800 DEG C or so.From the cigarette of coke oven 1
The low temperature flue waste gas that road comes out is introduced into the stack gases waste-heat recovery device 8 of the bottom side of coke oven 1 setting, more than stack gases
Heat reclamation device 8 absorbs the sensible heat of flue waste vapour, and stack gases temperature is reduced into 160 DEG C or so from 280 DEG C or so.More than dry coke quenching
Recyclegas is cooled to 150 DEG C or so by heat boiler 4 from 900 DEG C or so.
The superheated steam that the high-pressure superheater 43 of dry coke quenching residual heat boiler 4 is discharged is dry to put out as main steam red switch steam turbine 9
The superheated steam of middle pressure superheater 45 discharge of coke waste heat boiler enters steam turbine 9, dry coke quenching residual heat boiler as the first filling
Low-pressure superheater 47 discharge superheated steam as the second filling enter steam turbine 9.With this so that steam turbine 9 and generator 10
Rotate coaxially and generate electricity.
The steam discharge of the low pressure (LP) cylinder of steam turbine 9 enters condenser 11, and condensate is condensed into condenser 11.In condenser 11
Condensate is pressurizeed by condensate pump 12, is then sent to the low-pressure coal saver 49 of dry coke quenching residual heat boiler 4；Condensate is saved in low pressure
Feeding deoxygenation first 13 carries out deoxygenation after being preheated in coal device 49, and the water after deoxygenation falls into the low pressure stage pot for being arranged on first 13 lower section of deoxygenation
Cylinder 14.Deaerating type of cycles is used passes through down-comer and tedge between deoxygenation pattern, i.e. low pressure drum 14 and low pressure evaporator 48
Natural Circulation process is formed, the steam water interface that low pressure evaporator 48 is produced carries out steam-water separation in low pressure drum 14, produces
Saturated vapor enter deoxygenation first 13, thermal de-aeration is carried out to the condensate of low-pressure coal saver 49.The separation of low pressure drum 14
Saturated vapor out, removes the part that deoxygenation autophage falls, and residual steam is overheated into low-pressure superheater 47, then
Into the filling mouth of steam turbine 9 second.
Low pressure drum 14 is provided with two delivery ports, and one of delivery port delivers to stack gases by middle pressure feed pump 15
Waste-heat recovery device 8, is pressed in entering after being heated in stack gases waste-heat recovery device 8 in drum 16, middle pressure drum 16
Saturation water enters sensible heat of the raw coke oven gas waste-heat recovery device 7 to absorb raw coke oven gas by down-comer, in raw coke oven gas waste heat recovery
Turn into steam water interface in device 7 after vaporization and middle pressure drum 16 is back to by tedge, form one to high temperature famine
The Natural Circulation Vaporizing cooling process of coal gas.The saturated vapor that middle pressure drum 18 is isolated enters in dry coke quenching residual heat boiler 4
Pressure superheater 45 is overheated, subsequently into the filling mouth 92 of steam turbine 9 first.
Another delivery port of low pressure drum 14 delivers to the He of high-pressure economizer 46 successively after being pressurizeed by high pressure water pump 17
High pressure drum 18 is high by down-comer and tedge formation Natural Circulation process between high pressure drum 18 and high pressure evaporator 44
The steam water interface that evaporator 44 is produced is pressed to carry out steam-water separation in high pressure drum 18, the saturated vapor of generation is pressed through into height
Hot device 43 is overheated, subsequently into the main steam import 91 of steam turbine 9.
Understood as described above with practice, the heating power of the present invention recycled based on coke-oven plant's residual heat resources
Electricity generation system, is carried out comprehensive to the coke sensible heat, crude-gas sensible heat and stack gases sensible heat produced in coke dry quenching furnace production technology
Close and recycle, respectively by dry coke quenching residual heat boiler, raw coke oven gas waste-heat recovery device, stack gases waste-heat recovery device to three
Residual heat resources are planted to be reclaimed, and the progress of waste heat recovery therrmodynamic system is highly integrated, and according to heat source characteristic, by a whole set of carbonated drink
System is designed to high, medium and low three pressures system, and the optimization design of therrmodynamic system is fully carried out based on the second law of thermodynamics, is passed through
Smoke heat energy grade is matched with carbonated drink grade, realizes the step Optimum utilization of smoke heat energy, and coke oven region waste heat money
The limit in source is reclaimed.The present invention uses giving young employees remedial-courses in general knowledge and vocational skills vapour formula Turbo-generator Set, only sets a steam turbine to digest three kinds of pressures
The steam resource of power grade, substantially reduces the cost of investment of coke oven region afterheat generating system, and avoids low-pressure steam money
Diffusing for source, realizes maximally utilizing for resource.Present invention optimizes dry coke quenching residual neat recovering system, the waste coal of coke oven coke oven uprising tube
The pattern that gas residual neat recovering system and coke oven flue waste gas afterheat recovery system are independently arranged, to dry coke quenching waste heat recovery system
System, the therrmodynamic system of coke oven coke oven uprising tube raw coke oven gas residual neat recovering system, stack gases residual neat recovering system carry out height coupling, greatly
Simplify boiler circuit greatly so that a whole set of heat power generating system is more succinct, project occupation of land area and construction totle drilling cost are significantly
Reduction.Because three kinds of residual heat resources are produced with coke oven production technology simultaneously, thus it is of the invention with well can be real
The property applied and actual application value.
In summary, coke sensible heat, crude-gas sensible heat and the stack gases of the invention to being produced in coke oven production technology
Sensible heat carries out the heat power generating system of comprehensive reutilization, and the various residual heat resources in coke-oven plant are planned as a whole, and simplifies in system
A variety of waste heats are carried out integrated recycling by complexity in the most optimal way.
Describe and reclaimed according to of the present invention based on coke-oven plant's residual heat resources in an illustrative manner above with reference to accompanying drawing
The heat power generating system utilized.It will be understood by those skilled in the art, however, that for the invention described above proposed based on coking
The heat power generating system that factory's residual heat resources are recycled, can also make various change on the basis of present invention is not departed from
Enter.Therefore, protection scope of the present invention should be determined by the content of appended claims.
Claims (11)
1. a kind of heat power generating system recycled based on coke-oven plant's residual heat resources, it is characterised in that system includes：
Coke oven；
Raw coke oven gas waste-heat recovery device, the raw coke oven gas outlet of the raw coke oven gas waste-heat recovery device and the coke oven；
Stack gases retracting device, the stack gases retracting device is connected with the waste gas outlet of the coke oven；
Coke dry quenching furnace, the coke inlet of the coke dry quenching furnace is connected by Coke Transport device with the coke export of the coke oven, Jiao
Hot coke in stove is delivered to the coke dry quenching furnace by Coke Transport device and cooled down；
Dry coke quenching residual heat boiler, the gas approach of the dry coke quenching residual heat boiler is gone out by pipeline and the recyclegas of the coke dry quenching furnace
Mouth connection, the exhanst gas outlet of dry coke quenching residual heat boiler passes through pipeline and the recyclegas inlet communication of the coke dry quenching furnace, forms one
Superheater, evaporator and economizer, the dry coke quenching waste heat pot are provided with individual circulation loop, the dry coke quenching residual heat boiler
The first drum is provided with stove, the water inlet of the delivery port of first drum and the stack gases waste-heat recovery device connects
It is logical, provide feedwater, the venthole of first drum and dry coke quenching waste heat pot for the stack gases waste-heat recovery device
The air intake connection of the superheater of stove；
Second drum, the water inlet of the drum is connected with the delivery port of the stack gases waste-heat recovery device, described second pot
Steam/water circulating loop is formed between cylinder and the raw coke oven gas waste-heat recovery device, more than the venthole and dry coke quenching of second drum
The air intake connection of the superheater of heat boiler；
Steam turbine, the air intake of the steam turbine is connected by pipeline with the dry coke quenching residual heat boiler, and the steam turbine is with generating electricity
Machine is coaxially connected, 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 enters the gas approach of the dry coke quenching residual heat boiler by pipeline, by the superheater, steaming
Cool, and discharged from the exhanst gas outlet of the dry coke quenching residual heat boiler after hair device and economizer heat exchange, then pass through pipeline
The recyclegas import of the coke dry quenching furnace is returned to, so circulation,
The steam water interface that evaporator in the dry coke quenching residual heat boiler is produced enters the first drum, and first drum is institute
State stack gases waste-heat recovery device and feedwater is provided, the water outlet of the stack gases waste-heat recovery device enters the second drum, institute
State the first drum and provide feedwater for the raw coke oven gas waste-heat recovery device, the carbonated drink that the raw coke oven gas waste-heat recovery device is produced is mixed
Compound enters the second drum, and the saturated vapor that first drum and the second drum are isolated respectively enters the dry coke quenching waste heat
Boiler is overheated, and the superheated steam of the dry coke quenching residual heat boiler outlet enters steam turbine, drives steam turbine to do work and generate electricity.
2. the heat power generating system as claimed in claim 1 recycled based on coke-oven plant's residual heat resources, it is characterised in that institute
State in dry coke quenching residual heat boiler, the superheater includes high-pressure superheater, middle pressure superheater and low-pressure superheater, the evaporation
Device includes high pressure evaporator and low pressure evaporator, and the economizer includes high-pressure economizer and low-pressure coal saver.
3. the heat power generating system as claimed in claim 2 recycled based on coke-oven plant's residual heat resources, it is characterised in that institute
State in dry coke quenching residual heat boiler, it is high-pressure superheater, high pressure evaporator, middle pressure superheater, high-pressure economizer, low-pressure superheater, low
Pressure evaporator, low-pressure coal saver are set gradually according to flue gas flow direction.
4. the heat power generating system as claimed in claim 2 recycled based on coke-oven plant's residual heat resources, it is characterised in that institute
Stating the first drum includes high pressure drum and low pressure drum.
5. the heat power generating system as claimed in claim 4 recycled based on coke-oven plant's residual heat resources, it is characterised in that institute
The air intake for stating high-pressure superheater is connected with the venthole of the high pressure drum, the venthole of the high-pressure superheater and the vapour
The main air intake connection of turbine；The water inlet and venthole of the high pressure evaporator respectively by down-comer and tedge with it is described
High pressure drum is connected, and forms high pressure carbonated drink natural convection loop；The water inlet of the high-pressure economizer and the low pressure drum
First delivery port is connected, and high pressure water pump, the delivery port of the high-pressure economizer and the pressure cooker are provided with connecting pipeline
The water inlet connection of cylinder；The air intake of medium pressure superheater is connected with the venthole of second drum, medium pressure overheat
The venthole of device is connected with the first filling mouth of the steam turbine.
6. the heat power generating system as claimed in claim 4 recycled based on coke-oven plant's residual heat resources, it is characterised in that institute
The air intake for stating low-pressure superheater is connected with the low pressure drum, and the of the venthole of the low-pressure superheater and the steam turbine
Two filling mouths are connected；The water inlet and venthole of the low pressure evaporator pass through down-comer and tedge and the low pressure cooker respectively
Cylinder connection, forms low pressure vapor natural convection loop.
7. the heat power generating system as claimed in claim 6 recycled based on coke-oven plant's residual heat resources, it is characterised in that institute
State and condenser is provided with the steam drain of steam turbine, the air intake of the condenser is connected with the steam drain of the steam turbine, institute
Water inlet of the delivery port of condenser successively with condensate pump, the low-pressure coal saver is stated to connect.
8. the heat power generating system as claimed in claim 6 recycled based on coke-oven plant's residual heat resources, it is characterised in that institute
State and oxygen-eliminating device is provided with low 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 5 recycled based on coke-oven plant's residual heat resources, it is characterised in that institute
The water inlet for stating stack gases waste-heat recovery device is connected with the second delivery port of the low pressure drum, is provided with connecting pipeline
Middle pressure feed pump, the delivery port of the stack gases waste-heat recovery device is connected with the water inlet of second drum.
10. the heat power generating system as claimed in claim 1 recycled based on coke-oven plant's residual heat resources, it is characterised in that
The water inlet and venthole of the raw coke oven gas waste-heat recovery device are connected by down-comer and tedge with second drum respectively
It is logical, carbonated drink natural convection loop is pressed in formation.
11. the heat power generating system as claimed in claim 1 recycled based on coke-oven plant's residual heat resources, it is characterised in that
The system also includes the first deduster and the second deduster, and first deduster is arranged on the recyclegas of the coke dry quenching furnace
Export on the pipeline connected with the gas approach of the dry coke quenching residual heat boiler, second deduster is arranged on the dry coke quenching
On the pipeline of the recyclegas inlet communication of the exhanst gas outlet of waste heat boiler and the coke dry quenching furnace, second deduster with it is described
Circulating fan is additionally provided between the recyclegas import of coke dry quenching furnace.
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