CN108979773B - High-efficient power generation system of burning furnace waste heat is forged to pot-type based on header system - Google Patents

High-efficient power generation system of burning furnace waste heat is forged to pot-type based on header system Download PDF

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CN108979773B
CN108979773B CN201810979893.7A CN201810979893A CN108979773B CN 108979773 B CN108979773 B CN 108979773B CN 201810979893 A CN201810979893 A CN 201810979893A CN 108979773 B CN108979773 B CN 108979773B
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steam
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waste heat
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CN108979773A (en
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江文豪
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Huatian Engineering and Technology Corp MCC
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Huatian Engineering and Technology Corp MCC
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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
    • F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
    • 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
    • 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
    • F22B1/1807—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 using the exhaust gases of combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
    • F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/30—Technologies for a more efficient combustion or heat usage
    • 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
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Coke Industry (AREA)

Abstract

The high-efficient power generation system of burning furnace waste heat is forged to pot-type based on header pipe system includes steam turbine, generator, oxygen-eliminating device, the female pipe of high-pressure steam, the female pipe of low-pressure steam, oxygen-eliminating device water inlet header pipe, the female pipe of low pressure feedwater, low pressure feed pump and one set of waste heat power generation subsystem at least, and the steam outlet of each high-pressure superheater all feeds through the main steam mouth of high-pressure steam header pipe with the steam turbine, and the steam turbine drags the generator electricity generation, in arbitrary set of waste heat power generation subsystem: a low-pressure steam-water circulation loop is formed between the low-pressure boiler barrel and the calcined coke vaporization cooling module; a low-pressure steam-water circulation loop is formed between the low-pressure boiler barrel and the low-pressure evaporator, and a high-pressure steam-water circulation loop is formed between the high-pressure boiler barrel and the high-pressure evaporator. The system recycles the waste heat of calcined coke, and has compact layout and low investment cost. The resource utilization rate of the calcination process is improved, the outsourcing electric quantity of the carbon plant is reduced, and the production cost of the carbon plant is reduced.

Description

High-efficient power generation system of burning furnace waste heat is forged to pot-type based on header system
Technical Field
The invention relates to the technical field of waste heat utilization in the carbon industry, in particular to a high-efficiency power generation system based on the waste heat of a pot-type calcining furnace of a main pipe system.
Background
The carbon material is one of the main raw materials of the electrolytic aluminum production process, and the production of carbon material products is a key link for restricting the development of the aluminum industry. The aluminum industry in China develops into a rapid channel in recent years, carbon used for aluminum develops along with the aluminum industry, the capacity of carbon material products is increased from millions of tons before years to tens of millions of tons at present, and the carbon material products are developed at a certain acceleration.
The pot calciner is one of main devices in a carbon production process, can calcine petroleum coke with different volatile content, and has the advantages of stable quality of a calcined material, low carbon burning loss rate, high stacking density of the calcined coke, simplicity in operation, small maintenance workload, long continuous production period and the like, so that the pot calciner is widely applied to carbon plants and aluminum plants.
When the calcining furnace is used for calcining the raw materials, the heat generated by the combustion of the volatile components of the petroleum coke can be used for calcining the petroleum coke, besides, a large amount of surplus heat is discharged along with flue gas, and the temperature of the flue gas is even as high as 900 ℃. According to the calculation of the heat balance, the heat absorption of the raw material calcination only accounts for 33.5 percent of the heat expenditure of the calcining furnace, and the heat quantity carried away by the calcination flue gas accounts for 47.9 percent of the heat expenditure of the whole calcining furnace. However, the flue gas of the calciner has an obvious characteristic that the flue gas temperature is high, but the flue gas amount is small, so that the waste heat recovery of the high-temperature flue gas of the calciner in a carbon plant is not very positive, and even a plurality of carbon plants adopt a blast cooling mode, namely low-temperature air is mixed into the high-temperature flue gas through a high-power blower, is forcibly cooled and then is discharged into the atmosphere, so that precious waste of the waste heat resource of the flue gas is caused, and the new power consumption of the high-power blower also promotes the production cost of the carbon.
In addition, high-temperature calcined coke (the temperature can reach 1000 ℃) at the discharge port of the pot-type calciner also contains a large amount of sensible heat, the currently adopted method is that a cooling water jacket is arranged below the calciner, the high-temperature calcined coke is cooled by circulating cooling water, the cooling water in the cooling water jacket indirectly exchanges heat with the calcined coke of the calciner, the cooling water after absorbing heat is sent to a cooling tower for heat dissipation, and then returns to the water jacket again to be used as cooling water jacket inlet water, and the circulation is carried out, so that a large amount of heat energy is wasted obviously.
Therefore, if a set of calciner waste heat utilization system can be constructed, the calciner flue gas waste heat and calcined coke waste heat of the carbon plant can be efficiently recovered, and considerable economic benefits can be generated inevitably.
Disclosure of Invention
In order to solve the problems, the invention provides a header pipe-based pot-type calcining furnace waste heat high-efficiency power generation system which comprises a steam turbine (4), a power generator (5), a deaerator (8), a high-pressure steam header pipe (14), a low-pressure steam header pipe (15), a deaerator water inlet header pipe (16), a low-pressure water supply header pipe (17), a low-pressure water supply pump (9) and at least one set of waste heat power generation subsystems, wherein any set of waste heat power generation subsystem at least comprises a pot-type calcining furnace (1), a calcined coke cooling device (2), a waste heat boiler (3), a low-pressure boiler barrel (10), a high-pressure boiler barrel (13) and a high-pressure water supply pump (12), each calcined coke cooling device comprises a calcined coke vaporization cooling module (201) and a calcined coke water cooling module (202), the calcined coke vaporization cooling module is positioned on the high-temperature side of the calcined coke, and the calcined coke water cooling module is positioned on the low-temperature side of the calcined coke, wherein the water outlets of the calcined coke water cooling modules and the low-pressure economizers are communicated with the water inlet of a deaerator through a deaerator water inlet main pipe, the water outlet of the deaerator is sequentially communicated with a low-pressure water feed pump and a low-pressure water feed main pipe, and the low-pressure water feed main pipe is communicated with the water inlet of each low-pressure boiler barrel to supply water to each low-pressure boiler barrel; the steam outlet of the high-pressure boiler barrel is communicated with the steam inlet of the high-pressure overheater of the corresponding waste heat boiler, the steam outlet of the high-pressure overheater of each waste heat boiler is communicated with the main steam port of the steam turbine through a high-pressure steam main pipe, the steam outlet of the low-pressure boiler barrel is communicated with the steam inlet of the low-pressure overheater of the waste heat boiler, the steam outlet of the low-pressure overheater of each waste heat boiler is communicated with the steam supplementing port of the steam turbine through a low-pressure steam main pipe, the steam turbine is connected with the generator, the steam turbine drags the generator to generate electricity, and in any set of waste heat power generation: the discharge port of the pot-type calciner is communicated with the feed port of the calcined coke cooling device, high-temperature calcined coke discharged from the pot-type calciner exchanges heat in the calcined coke cooling device to reduce the temperature, the smoke outlet of the pot-type calciner is communicated with the smoke inlet of the waste heat boiler, high-temperature smoke discharged from the pot-type calciner exchanges heat in the waste heat boiler to reduce the temperature, the low-pressure boiler barrel is communicated with the water inlet of the calcined coke vaporization cooling module through a first descending pipe (101) and is communicated with the steam outlet of the calcined coke vaporization cooling module through a first ascending pipe (102) to form a low-pressure steam-water circulation loop, and the low-pressure boiler barrel supplies water for the calcined coke cooling device and separates a generated steam-water mixture; the low-pressure boiler barrel is also communicated with a water inlet of a low-pressure evaporator (305) of the waste heat boiler through a second descending pipe (103) and is communicated with a steam outlet of the low-pressure evaporator through a second ascending pipe (104) to form a further low-pressure steam-water circulation loop, the low-pressure boiler barrel supplies water for the low-pressure evaporator and separates a generated steam-water mixture, a water outlet of the low-pressure boiler barrel is communicated with a water inlet of a high-pressure economizer (303) through a high-pressure water supply pump, a water outlet of the high-pressure economizer (303) is communicated with the water inlet of the high-pressure boiler barrel to supply water for the high-pressure boiler barrel, the high-pressure boiler barrel is communicated with a water inlet of a high-pressure evaporator (302) of the waste heat boiler through a third descending pipe (105) and is communicated with the steam outlet of the high-pressure evaporator of the waste heat boiler through a third ascending pipe (106) to form a high-, the high-pressure boiler barrel supplies water to the high-pressure evaporator and is used for separating a steam-water mixture generated by the high-pressure evaporator.
Preferably, the system also comprises a condenser (6), a condensate pump (7) and a condensate pump water outlet main pipe (18), wherein a steam exhaust port of the steam turbine is sequentially communicated with the condenser, the condensate pump and the condensate pump water outlet main pipe along the steam-water flow direction, and the condensate pump water outlet main pipe is respectively communicated with a water inlet of the calcined coke water cooling module and a water inlet of the low-pressure economizer.
Preferably, in any set of waste heat power generation subsystem, the high-pressure superheater, the high-pressure evaporator, the high-pressure economizer, the low-pressure superheater, the low-pressure evaporator and the low-pressure economizer are sequentially arranged in the waste heat boiler along the flow direction of flue gas.
Preferably, the steam turbine is further provided with a low-pressure steam extraction opening, and the low-pressure steam extraction opening is communicated with a heating steam inlet of the deaerator and provides deaerating steam for the deaerator.
Preferably, any set of waste heat power generation subsystem further comprises a circulating pump (11), wherein the circulating pump (11) is arranged on the first descending pipe (101) to drive the low-pressure steam-water forced circulation between the low-pressure drum (10) and the calcined coke evaporation cooling module.
The invention has the beneficial effects that:
1) the high-efficient power generation system of burning furnace waste heat is forged to pot-type based on master pipe system has been built, it unifies the recovery with the burnt waste heat of calcining and the flue gas waste heat of pot-type burning furnace to design into integrated system, adopt vaporization cooling device to retrieve to burnt sensible heat of calcining, adopt exhaust-heat boiler to retrieve to flue gas sensible heat, the saturated steam that vaporization cooling device produced sends into exhaust-heat boiler and superheats, the superheated steam of exhaust-heat boiler export gets into the steam turbine, drive steam turbine does work and generates electricity, burnt and flue gas waste heat integration recycle after calcining of pot-type burning furnace has been realized. The complete set of thermodynamic system is scientifically designed, the layout is compact, the occupied area is small, and the investment cost is low.
2) Compared with the conventional mode of cooling by using a water jacket, the high-temperature waste heat of calcined coke is recycled by the vaporization cooling device, converted into valuable steam resources and used for driving a steam turbine to generate electricity, so that the resource utilization rate of the calcination process is greatly improved, the purchased electric quantity of a carbon plant is reduced, and the production cost of the carbon plant is reduced.
3) In the aspect of design of a steam-water system, the invention adopts a mode that the calcined coke cooling device and the waste heat boiler share the boiler barrel and the deaerator, thereby effectively improving the integration level of the system; in consideration of the operation conditions of the calcined coke cooling device and in order to ensure the cooling effect of the calcined coke cooling device, the calcined coke cooling device is designed into a low-pressure steam-water system, a forced circulation mode is adopted, the circulating operation of the whole steam-water system is driven by a circulating pump, and a natural circulation mode is adopted for the steam-water circulation of a waste heat boiler so as to reduce the power consumption of the system, so that the whole device effectively considers the energy-saving operation of the system under the condition of ensuring the safety and reliability of the system. In addition, the steam-water system of the waste heat boiler is designed into a high-pressure steam-water system and a low-pressure steam-water system, so that the waste heat of the flue gas is recovered from the quantity by greatly reducing the exhaust gas temperature of the waste heat boiler, and the energy cascade optimization utilization is realized according to the energy grade, so that the waste heat of the flue gas is recovered from the quality.
Drawings
The above features and technical advantages of the present invention will become more apparent and readily appreciated from the following description of the embodiments thereof taken in conjunction with the accompanying drawings.
FIG. 1 is a process flow diagram of a tank calciner waste heat high-efficiency power generation system based on a header pipe according to an embodiment of the invention.
Detailed Description
Embodiments of a header pipe based tank calciner waste heat efficient power generation system according to the present invention will be described below with reference to the accompanying drawings. Those of ordinary skill in the art will recognize that the described embodiments can be modified in various different ways, or combinations thereof, without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. Furthermore, in the present description, the drawings are not to scale and like reference numerals refer to like parts.
The high-efficiency power generation system based on the waste heat of the pot-type calcining furnace of the header pipe system comprises at least one set of waste heat power generation subsystems, and any waste heat power generation subsystem at least comprises a pot-type calcining furnace 1, a calcined coke cooling device 2, a waste heat boiler 3, a low-pressure drum 10, a high-pressure drum 13 and a high-pressure water feeding pump 12. And the multiple waste heat power generation subsystems share the steam turbine 4, the generator 5, the deaerator 8, the high-pressure steam main pipe 14, the low-pressure steam main pipe 15, the deaerator water inlet main pipe 16, the low-pressure water supply main pipe 17 and the low-pressure water supply pump 9. Only one set of cogeneration subsystems is described below as an example.
The discharge hole of the pot-type calcining furnace 1 is communicated with the feed hole of the calcined coke cooling device 2, and the high-temperature calcined coke discharged from the pot-type calcining furnace 2 exchanges heat and is cooled in the calcined coke cooling device 2. And the flue gas outlet of the pot-type calcining furnace 1 is communicated with the flue gas inlet of the waste heat boiler 3, and the high-temperature flue gas from the pot-type calcining furnace 1 exchanges heat and cools in the waste heat boiler 3. Preferably, the calcined coke cooling device 2 comprises a calcined coke vaporization cooling module 201 and a calcined coke water cooling module 202, wherein the calcined coke vaporization cooling module 201 is located on the high-temperature side of the calcined coke, and the calcined coke water cooling module 202 is located on the low-temperature side of the calcined coke.
The waste heat boiler 3 is internally provided with a multi-stage heating surface, which comprises a high-pressure superheater 301, a high-pressure evaporator 302, a high-pressure economizer 303, a low-pressure superheater 304, a low-pressure evaporator 305 and a low-pressure economizer 306. The steam outlet of the high-pressure superheater 301 is communicated with the main steam outlet of the steam turbine 4 through a high-pressure steam main pipe 14, and if a plurality of sets of waste heat power generation subsystems exist, the steam outlet of the high-pressure superheater 301 of the waste heat boiler 3 of each waste heat power generation subsystem is communicated with the high-pressure steam main pipe 14. As shown in fig. 1, the steam outlets of the N high-pressure superheaters 301 are all communicated with the high-pressure steam header 14. The steam outlet of the low-pressure superheater 304 is communicated with the steam supplementing port of the steam turbine 4 through a low-pressure steam main pipe 15 (if a plurality of sets of waste heat power generation subsystems exist, the steam outlet of the low-pressure superheater 304 of the waste heat boiler 3 of each waste heat power generation subsystem is communicated with the low-pressure steam main pipe 15). The steam turbine 4 is connected with the generator 5, and the steam turbine 4 drags the generator 5 to generate electricity.
Preferably, the system also comprises a condensate pump water outlet main pipe 18, a condenser 6 and a condensate pump 7, wherein a steam outlet of the steam turbine 4 is sequentially communicated with the condenser 6, the condensate pump 7 and the condensate pump water outlet main pipe 18 along the steam-water flow direction, and the condensate pump water outlet main pipe 18 is respectively communicated with a water inlet of the calcined coke water cooling module 202 and a water inlet of the low-pressure economizer 306 (if a plurality of sets of waste heat power generation subsystems exist, the condensate pump water outlet main pipe 18 is respectively communicated with the calcined coke water cooling module 202 and the low-pressure economizer 306 of each waste heat power generation subsystem). The water outlets of the calcined coke water cooling module 202 and the low-pressure economizer 306 are both communicated with the water inlet of the deaerator 8 through a deaerator water inlet main pipe 16 (if a plurality of sets of waste heat power generation subsystems exist, the water outlets of the calcined coke water cooling module 202 and the low-pressure economizer 306 of each waste heat power generation subsystem are both communicated with the deaerator water inlet main pipe 16).
The delivery port of oxygen-eliminating device 8 communicates with low pressure feed pump 9, the female pipe 17 of low pressure feedwater in order, the female pipe 17 of low pressure feedwater communicates with the water inlet of low pressure boiler section of thick bamboo 10, to supply water to low pressure boiler section of thick bamboo 10 (if there are many sets of cogeneration subsystems, then the female pipe 17 of low pressure feedwater communicates with the water inlet of the low pressure boiler section of thick bamboo 10 of every cogeneration subsystem).
The low-pressure boiler barrel 10 is communicated with a water inlet of the calcined coke vaporization cooling module 201 through a first descending pipe 101 and is communicated with a steam outlet of the calcined coke vaporization cooling module 201 through a first ascending pipe 102 to form a low-pressure steam-water circulation loop, and the low-pressure boiler barrel 10 supplies water for the calcined coke vaporization cooling module 201 and is used for separating a steam-water mixture generated by the calcined coke vaporization cooling module.
The low-pressure drum 10 is further communicated with a water inlet and a steam outlet of the low-pressure evaporator 305 of the waste heat boiler 3 through a second downcomer 103 and a second riser 104, so as to form a further low-pressure steam-water circulation loop, and the low-pressure drum 10 supplies water to the low-pressure evaporator 305 and is used for separating a steam-water mixture generated by the low-pressure evaporator.
The water outlet of the low-pressure boiler barrel 10 is communicated with the water inlet of the high-pressure economizer 303 through a high-pressure water feeding pump 12, and the water outlet of the high-pressure economizer 303 is communicated with the water inlet of the high-pressure boiler barrel 13 to supply water to the high-pressure boiler barrel 13.
The high-pressure drum 13 is communicated with a water inlet of the high-pressure evaporator 302 of the waste heat boiler 3 through a third downcomer 105, and is communicated with a steam outlet of the high-pressure evaporator 302 of the waste heat boiler 3 through a third riser 106 to form a high-pressure steam-water circulation loop, and the high-pressure drum 13 supplies water to the high-pressure evaporator 302 and is used for separating a steam-water mixture generated by the high-pressure evaporator 302.
The steam outlet of the low-pressure drum 10 is communicated with the steam inlet of the low-pressure superheater 303 of the waste heat boiler 3, and the outlet saturated steam of the low-pressure drum 10 is sent to the low-pressure superheater 303 for superheating.
The steam outlet of the high-pressure drum 13 is communicated with the steam inlet of the high-pressure superheater 301 of the waste heat boiler 3, and the outlet saturated steam of the high-pressure drum 13 is sent to the high-pressure superheater 301 for superheating.
In an alternative embodiment, the high-pressure superheater 301, the high-pressure evaporator 302, the high-pressure economizer 303, the low-pressure superheater 304, the low-pressure evaporator 305, and the low-pressure economizer 306 are arranged in sequence in the flue gas flow direction in the waste heat boiler.
In an alternative embodiment, the steam turbine 4 is further provided with a low-pressure steam extraction port, and the low-pressure steam extraction port is communicated with a heating steam inlet of the deaerator 8 to provide steam for deaerating the deaerator 8.
In an optional embodiment, the system further comprises a circulating pump 11, and the circulating pump 11 is arranged on the first descending pipe 101 to drive forced circulation of low-pressure steam water between the low-pressure drum 10 and the calcined coke evaporation cooling module 201.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (3)

1. A pot-type calcining furnace waste heat efficient power generation system based on a header pipe is characterized by comprising a steam turbine (4), a power generator (5), a deaerator (8), a high-pressure steam header pipe (14), a low-pressure steam header pipe (15), a deaerator water inlet header pipe (16), a low-pressure water supply header pipe (17), a low-pressure water supply pump (9) and at least one set of waste heat power generation subsystems, wherein any set of waste heat power generation subsystems at least comprises a pot-type calcining furnace (1), a calcined coke cooling device (2), a waste heat boiler (3), a low-pressure boiler barrel (10), a high-pressure boiler barrel (13) and a high-pressure water supply pump (12), the waste heat boiler comprises a high-pressure superheater (301), a high-pressure evaporator (302), a high-pressure economizer (303), a low-pressure superheater (304), a low-pressure evaporator (305) and,
each calcined coke cooling device comprises a calcined coke vaporization cooling module (201) and a calcined coke water cooling module (202), the calcined coke vaporization cooling module is positioned on the high-temperature side of the calcined coke, the calcined coke water cooling module is positioned on the low-temperature side of the calcined coke,
the water outlets of the calcined coke water-cooling modules and the low-pressure economizers are communicated with the water inlet of a deaerator through a deaerator water inlet main pipe, the water outlet of the deaerator is sequentially communicated with a low-pressure water feed pump and a low-pressure water feed main pipe, and the low-pressure water feed main pipe is communicated with the water inlet of each low-pressure boiler barrel to supply water to each low-pressure boiler barrel;
the steam outlet of the high-pressure boiler barrel is communicated with the steam inlet of the high-pressure overheater of the corresponding waste heat boiler, the steam outlet of the high-pressure overheater of each waste heat boiler is communicated with the main steam port of the steam turbine through a high-pressure steam main pipe,
the steam outlet of the low-pressure boiler barrel is communicated with the steam inlet of the low-pressure overheater of the waste heat boiler, the steam outlet of the low-pressure overheater of each waste heat boiler is communicated with the steam supplementing port of a steam turbine through a low-pressure steam main pipe, the steam turbine is connected with the generator, the steam turbine drags the generator to generate electricity,
wherein, in any set of waste heat power generation subsystem: the discharge hole of the pot-type calcining furnace is communicated with the feed hole of the calcined coke cooling device, the high-temperature calcined coke discharged from the pot-type calcining furnace exchanges heat and cools in the calcined coke cooling device, the smoke outlet of the pot-type calcining furnace is communicated with the smoke inlet of the waste heat boiler, the high-temperature smoke discharged from the pot-type calcining furnace exchanges heat and cools in the waste heat boiler,
the low-pressure boiler barrel is communicated with a water inlet of the calcined coke vaporization cooling module through a first descending pipe (101) and is communicated with a steam outlet of the calcined coke vaporization cooling module through a first ascending pipe (102) to form a low-pressure steam-water circulation loop, and the low-pressure boiler barrel supplies water for the calcined coke cooling device and separates a generated steam-water mixture;
the low-pressure boiler barrel is also communicated with a water inlet of a low-pressure evaporator (305) of the waste heat boiler through a second downcomer (103) and communicated with a steam outlet of the low-pressure evaporator through a second riser (104) to form a further low-pressure steam-water circulation loop, the low-pressure boiler barrel supplies water for the low-pressure evaporator and separates a generated steam-water mixture,
a water outlet of the low-pressure boiler barrel is communicated with a water inlet of a high-pressure economizer (303) through a high-pressure water feeding pump, a water outlet of the high-pressure economizer (303) is communicated with a water inlet of the high-pressure boiler barrel to supply water for the high-pressure boiler barrel, the high-pressure boiler barrel is communicated with a water inlet of a high-pressure evaporator (302) of the waste heat boiler through a third descending pipe (105) and communicated with a steam outlet of the high-pressure evaporator of the waste heat boiler through a third ascending pipe (106) to form a high-pressure steam-water circulation loop, the high-pressure boiler barrel supplies water for the high-pressure evaporator and is used for separating a steam-water mixture generated by the high-pressure evaporator,
wherein, the device also comprises a condenser (6), a condensate pump (7) and a condensate pump water outlet main pipe (18),
the exhaust port of the steam turbine is communicated with the condenser, the condensate pump and a condensate pump water outlet main pipe in sequence along the steam-water flow direction, the condensate pump water outlet main pipe is respectively communicated with the water inlet of the calcined coke water cooling module and the water inlet of the low-pressure economizer,
any set of waste heat power generation subsystem further comprises a circulating pump (11), wherein the circulating pump (11) is arranged on the first descending pipe (101) to drive the low-pressure steam-water forced circulation between the low-pressure boiler barrel (10) and the calcined coke evaporation cooling module.
2. The bustle pipe-based pot calciner waste heat efficient power generation system according to claim 1, wherein in any set of waste heat power generation subsystem, the high-pressure superheater, the high-pressure evaporator, the high-pressure economizer, the low-pressure superheater, the low-pressure evaporator and the low-pressure economizer are sequentially arranged in the waste heat boiler along the flow direction of flue gas.
3. The bustle pipe-based pot-type calciner waste heat efficient power generation system according to claim 1, wherein the steam turbine is further provided with a low-pressure steam extraction port, and the low-pressure steam extraction port is communicated with a heating steam inlet of a deaerator to provide steam for deaerating for the deaerator.
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