CN215675138U - Dry quenching waste heat power generation system - Google Patents
Dry quenching waste heat power generation system Download PDFInfo
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- CN215675138U CN215675138U CN202121396862.2U CN202121396862U CN215675138U CN 215675138 U CN215675138 U CN 215675138U CN 202121396862 U CN202121396862 U CN 202121396862U CN 215675138 U CN215675138 U CN 215675138U
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The utility model relates to a dry quenching waste heat power generation system which comprises a nitrogen circulating system, wherein the nitrogen circulating system is a closed circulating loop formed by connecting a dry quenching furnace, a cyclone dust collector, a waste heat boiler, a circulating fan and a heat pipe heat exchanger through a nitrogen pipeline; the nitrogen circulating system is also provided with a high-temperature bag-type dust collector, and the high-temperature bag-type dust collector is arranged on a nitrogen pipeline between the waste heat boiler and the circulating fan; the nitrogen circulating system is also provided with a pressure swing adsorption nitrogen making unit which is arranged on a nitrogen pipeline behind the heat pipe heat exchanger. The high-temperature bag-type dust collector can be used for further removing dust of the circulating gas, so that the problem of scaling of the impeller of the circulating fan is effectively solved; the design of the pressure swing adsorption nitrogen making unit can supplement the nitrogen lost by the nitrogen circulating system, supplement the nitrogen, regulate the temperature of the circulating nitrogen entering the coke dry quenching furnace and ensure the cooling effect of coke.
Description
Technical Field
The utility model relates to the technical field of comprehensive utilization of coke dry quenching waste heat, in particular to a coke dry quenching waste heat power generation system.
Background
The coking production of the metallurgical enterprises mainly provides coke raw materials for blast furnace smelting, the temperature of the coke discharged from the coke oven is up to about 1000 ℃, the heat energy has higher utilization value, the heat energy is reasonably and efficiently recovered, and good economic benefit and social environmental benefit can be brought to related metallurgical enterprises.
The existing dry quenching waste heat power generation system has the following defects:
1. in the nitrogen circulating system, the cyclone dust collector has limited dust removal effect on high-temperature flue gas discharged from a dry quenching furnace, fine dust particles are contained in the whole circulating pipeline, high-temperature dust-containing nitrogen forms serious scale at the impeller of the circulating fan, the dynamic balance of the circulating fan is influenced, and the overhaul rate is high;
2. in a nitrogen circulating system, the loss of nitrogen is generally supplemented by feeding 0.8MPa of nitrogen through a steel plant, the supplement cost of conveying gas is high, an adjustable temperature control device is lacked between a waste heat boiler and a dry quenching furnace, and when the temperature of the nitrogen entering the dry quenching furnace is higher than a set temperature, the cooling of coke in the dry quenching furnace is not facilitated;
3. the existing external steam pipe network has the problem of poor stability;
4. in the evaporation power generation system, the heat energy of steam dissipated by a steam seal of a steam turbine is not recovered by waste heat, and the heat energy is seriously wasted.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the dry quenching waste heat power generation system can improve the scaling of the circulating fan impeller and has high heat energy utilization rate.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
the dry quenching waste heat power generation system comprises a nitrogen circulating system, wherein the nitrogen circulating system is a closed circulating loop formed by connecting a dry quenching furnace, a cyclone dust collector, a waste heat boiler, a circulating fan and a heat pipe heat exchanger through a nitrogen pipeline; the nitrogen circulating system is also provided with a high-temperature bag-type dust collector, and the high-temperature bag-type dust collector is arranged on a nitrogen pipeline between the waste heat boiler and the circulating fan; the nitrogen circulating system is also provided with a pressure swing adsorption nitrogen making unit which is arranged on a nitrogen pipeline behind the heat pipe heat exchanger.
In a preferred embodiment of the dry quenching waste heat power generation system provided by the utility model, the nitrogen circulating system is also provided with a diffusing pipeline at the air inlet end of the circulating fan.
In a preferred embodiment of the dry quenching waste heat power generation system provided by the utility model, the pressure swing adsorption nitrogen making unit is connected with the nitrogen pipeline through a nitrogen supplementing pipeline and a cooling pipeline.
In a preferred embodiment of the dry quenching waste heat power generation system provided by the utility model, the dry quenching waste heat power generation system further comprises an evaporation power generation system, wherein the evaporation power generation system comprises a steam turbine, a condenser, a condensate pump, a heat pipe heat exchanger, a deaerator and a main water feed pump which are sequentially connected, a steam inlet of the steam turbine is connected with a steam outlet of the waste heat boiler through a main steam main pipe, and the main water feed pump is connected with the waste heat boiler.
In a preferred embodiment of the dry quenching waste heat power generation system provided by the utility model, the evaporation power generation system further comprises a drainage flash tank, the top of the drainage flash tank is connected with the vapor phase space of the condenser, the bottom of the drainage flash tank is connected with the liquid phase space of the condenser, and a spray port of the drainage flash tank is connected with a condensate pipe.
In a preferred embodiment of the dry quenching waste heat power generation system provided by the utility model, the evaporation power generation system further comprises a steam seal cooler, a pipe side of the steam seal cooler is connected with a condensate pipe, a shell side of the steam seal cooler is connected with an escape steam outlet of the steam turbine, and condensate water of the steam seal cooler automatically flows to a liquid phase space of the steam condenser.
In a preferred embodiment of the dry quenching waste heat power generation system provided by the utility model, the evaporation power generation system further comprises a steam seal cooler steam seal gas source box, a steam inlet of the steam seal gas source box is connected with the main steam main pipe through a pipeline and a first regulating valve, a steam outlet is connected with a sealed gas source interface of the steam turbine, and a spray port of the steam seal cooler steam seal gas source box is connected with a condensate pipe through a pipeline and a second regulating valve.
In a preferred embodiment of the dry quenching waste heat power generation system provided by the utility model, the system further comprises a temperature and pressure reducer, a high-temperature steam inlet of the temperature and pressure reducer is connected with the main steam main pipe, a low-temperature steam outlet of the temperature and pressure reducer is connected with an external steam pipeline to serve as a balanced air source of external steam, and a spraying water source of the temperature and pressure reducer is connected out from a pipeline behind the main water feed pump.
In a preferred embodiment of the dry quenching waste heat power generation system provided by the utility model, the external steam pipeline is also connected with a steam extraction port of the steam turbine.
In a preferred embodiment of the dry quenching waste heat power generation system provided by the utility model, a heating air source of the deaerator is provided by the external steam pipeline and/or the steam extraction port of the steam turbine.
Compared with the prior art, the coke dry quenching waste heat power generation system provided by the utility model has the beneficial effects that:
according to the utility model, the high-temperature bag-type dust remover is designed on the nitrogen pipeline between the waste heat boiler and the circulating fan, and the circulating gas is further dedusted by the high-temperature bag-type dust remover, so that the problem of scaling of the impeller of the circulating fan is effectively reduced, and the service life of the circulating fan is prolonged; the design of the pressure swing adsorption nitrogen making unit can supplement nitrogen lost by a nitrogen circulating system, is lower in cost compared with the traditional nitrogen supplementing mode, and can also supplement proper nitrogen according to the temperature in the coke dry quenching furnace, the temperature of circulating gas and the flow to adjust the temperature of the circulating nitrogen entering the coke dry quenching furnace, so that the cooling effect of coke is ensured.
Connecting part of the temperature-reducing and pressure-reducing steam with an external steam pipeline to serve as a balance gas source, so that the steam balance of the external steam pipeline is ensured, and the stability of an external steam pipe network is improved;
and thirdly, the steam seal air source box arranged on the evaporation power generation system recovers the waste heat of the steam seal dissipated steam of the steam turbine, so that the waste of heat energy of the steam seal dissipated steam is avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic structural diagram of a dry quenching waste heat power generation system provided by the utility model.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
The embodiment provides a dry quenching waste heat power generation system, as shown in fig. 1, which comprises a nitrogen circulating system, wherein the nitrogen circulating system is a closed circulating loop formed by connecting a dry quenching furnace 15, a cyclone dust collector 16, a waste heat boiler 17, a circulating fan 19 and a heat pipe heat exchanger 20 through a nitrogen pipeline, and high-parameter steam is generated in the waste heat boiler after red coke sensible heat is efficiently recovered in the dry quenching furnace. The nitrogen gas circulation system still is equipped with high temperature sack cleaner 18, high temperature sack cleaner 18 is located on the nitrogen gas pipeline between exhaust-heat boiler 17 and circulating fan 19, high temperature sack cleaner 18 can further remove dust to the circulating gas, effectively slows down the problem of circulating fan impeller scale deposit, has reduced circulating fan's maintenance rate, has improved circulating fan's life.
Further, the nitrogen circulation system of this embodiment still is equipped with pressure swing adsorption nitrogen generator unit 21, pressure swing adsorption nitrogen generator unit 21 is located on the nitrogen gas pipeline behind heat pipe exchanger 20, the design of pressure swing adsorption nitrogen generator unit can supply the nitrogen gas of nitrogen circulation system loss on the one hand, compares in traditional tonifying qi mode, and the cost is lower, and on the other hand, also can supply into appropriate amount of nitrogen gas according to the temperature in the dry quenching stove, the temperature and the flow of circulating gas and adjust the temperature of entering dry quenching stove circulating nitrogen gas, guarantees the cooling effect of coke.
In the embodiment, the pressure swing adsorption nitrogen making unit is arranged behind the heat pipe heat exchanger, so that the heat exchange of the circulating gas is not influenced, and meanwhile, the air supplement pressure of the pressure swing adsorption nitrogen making unit is only required to be adjusted to be higher than the air outlet pressure of the circulating fan; compared with the air inlet of the circulating fan, the energy consumption of the circulating fan can be reduced (the air inlet of the circulating fan is arranged, the circulation of the circulating fan is increased, and the energy consumption is high).
Specifically, the pressure swing adsorption nitrogen generator set 21 of this embodiment is connected to the nitrogen pipeline through a nitrogen supplement pipeline 211 and a cooling pipeline 212, as shown in fig. 1, the nitrogen supplement pipeline is nitrogen for supplementing loss of the system, and the cooling pipeline is used for filling a large amount of nitrogen and mixing high-temperature mixed gas in the nitrogen pipeline for mixing and cooling.
Preferably, the nitrogen gas circulation system of this embodiment is located circulating fan's air inlet end still is equipped with diffuses pipeline 22, as shown in figure 1, diffuse the pressure that the pipeline is used for balancing nitrogen gas pipeline, when needing to utilize pressure swing adsorption nitrogen generator group to cool down, diffuse the pipeline and open, the intake that reduces circulating fan during, also can reduce circulating fan's energy consumption.
Example two
Based on the first embodiment, the dry quenching waste heat power generation system of the embodiment further comprises an evaporation power generation system, as shown in fig. 1, the evaporation power generation system comprises a steam turbine 1, a condenser 3, a condensate pump 5, a heat pipe heat exchanger 20, a deaerator 10 and a main water feed pump 9 which are connected in sequence, a steam inlet of the steam turbine 1 is connected with a steam outlet of the waste heat boiler 17 through a main steam main pipe 12, the main water feed pump 9 is connected with the waste heat boiler 17, high-parameter steam generated by the waste heat boiler enters the steam turbine 1 through the main steam main pipe 12 and a main steam valve 13 arranged on the main steam main pipe to do work, and drives a generator 2 connected with the steam turbine to generate power; condensate water that 1 doing work of steam turbine produced gets into condenser 3, and condenser upper portion is equipped with vacuum pump group for evacuation to guarantee the vacuum of condenser, improve the generating efficiency, the liquid phase space of condenser lower part passes through the pipeline and links to each other with condensate pump 5, and condensate pump carries to oxygen-eliminating device 10 after preheating condensate water through heat pipe exchanger 20, the oxygen-eliminating device adopts the integral type structure, and the lower part is the deoxidization water tank, and the condensate water gets into the oxygen-eliminating device after the heat pipe exchanger heat transfer, retrieves circulating nitrogen's low temperature heat, and the condensate water is through steam heating, realizes the deoxidization purpose, and the heating air supply of oxygen-eliminating device 10 by outside steam conduit 14 and/or steam extraction mouth of steam turbine 1 provides, exhaust-heat boiler 17 water supply source comes from the lower part water tank of oxygen-eliminating device 10, and the deoxidization water is sent exhaust-heat boiler 17 after 9 pressurizations through the main feed pump.
The evaporation section of the heat pipe exchanger 20 is arranged on the circulating nitrogen side, the condensation section is arranged on the condensation water side, when the evaporation section of the heat pipe absorbs heat from the circulating nitrogen, the working medium in the heat pipe evaporates and rises to the condensation section of the heat pipe, the working medium steam condenses to release latent heat, so that the condensation water is heated, and through condensation and vaporization of the working medium in the heat pipe, the smoke temperature can be reduced, the condensation water is heated, and the purpose of recycling low-grade heat energy of the circulating nitrogen is achieved.
Preferably, the evaporation power generation system further comprises an external steam pipeline 14 and a temperature and pressure reduction device 11, a high-temperature steam inlet of the temperature and pressure reduction device 11 is connected with the main steam pipe 12, a low-temperature steam outlet is connected with the external steam pipeline 14 and serves as a balanced air source of external steam, and a spraying water source of the temperature and pressure reduction device 11 is connected out through a pipeline behind the main water supply pump 9. High-parameter steam generated by the waste heat boiler 17 is sent to a main steam pipe 12, two paths of steam are connected from the main steam pipe, one path of steam is sent to the steam turbine 1 for power generation, the other path of steam is sent to the temperature and pressure reducing device 11 and used as a balance air source of external steam, a spraying water source of the temperature and pressure reducing device is connected from a pipeline behind a main water supply pump, and the temperature and the pressure of the externally sent steam are reduced through spraying water.
Preferably, the external steam pipeline 14 of this embodiment is further connected to the steam extraction port of the steam turbine 1, and the extracted steam of the steam turbine 1 may also be directly used as a balanced air source of the external steam pipe network. One path of air source of the external steam pipeline is from the temperature and pressure reducing device, the other path of air source is from the steam extraction port of the steam turbine, and dynamic balance of steam use of the whole plant is realized through pressure regulation.
EXAMPLE III
On the basis of embodiment two, this embodiment the evaporation power generation system still includes hydrophobic flash tank 6, the top of hydrophobic flash tank 6 is connected the vapor phase space of condenser 3, the bottom is connected the liquid phase space of condenser 3, its spraying mouth is connected with the condensate pipe, and hydrophobic flash tank is with the hydrophobic recovery of system steam, and the shower water of hydrophobic flash tank connects out from main condensation water pipe, according to the temperature automatically regulated water spray, the reducible calorific loss of setting and vapor water loss of hydrophobic flash tank.
Preferably, the evaporation power generation system of this embodiment further includes a steam seal cooler 7, a pipe pass of the steam seal cooler 7 is connected to a condensate pipe, a shell pass is connected to an escape steam outlet of the steam turbine 1, condensate thereof automatically flows to a liquid phase space of the condenser, and a top of the steam seal cooler is connected to an air extraction device to remove air in the system.
Preferably, this embodiment evaporation power generation system still includes gland sealing air source case 8, provides sealed air supply for the steam turbine, the steam inlet of gland sealing air source case 8 passes through the pipeline and first governing valve is connected the main steam main pipe 12, and the steam outlet is connected the sealed air source interface of steam turbine 1, its spraying mouth pass through pipeline and second governing valve and condensate pipe connection, the linkage control of gland sealing air source case through first governing valve and second governing valve controls the temperature and the pressure parameter of gland sealing steam jointly, and the condensate water in the gland sealing air source case is through the decompression back, and the gravity flow gets into the condenser, and the gland sealing air source case that this embodiment was equipped with retrieves the waste heat of the gland sealing escape steam of steam turbine, has avoided the heat energy waste of gland sealing escape steam.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A dry quenching waste heat power generation system comprises a nitrogen circulating system, wherein the nitrogen circulating system is a closed circulating loop formed by connecting a dry quenching furnace, a cyclone dust collector, a waste heat boiler, a circulating fan and a heat pipe heat exchanger through a nitrogen pipeline; the method is characterized in that: the nitrogen circulating system is also provided with a high-temperature bag-type dust collector, and the high-temperature bag-type dust collector is arranged on a nitrogen pipeline between the waste heat boiler and the circulating fan;
the nitrogen circulating system is also provided with a pressure swing adsorption nitrogen making unit which is arranged on a nitrogen pipeline behind the heat pipe heat exchanger.
2. The dry quenching waste heat power generation system of claim 1, wherein: the nitrogen circulating system is positioned at the air inlet end of the circulating fan and is also provided with a diffusing pipeline.
3. The dry quenching waste heat power generation system of claim 2, wherein: the pressure swing adsorption nitrogen making unit is connected with the nitrogen pipeline through a nitrogen supplementing pipeline and a cooling pipeline.
4. The dry quenching waste heat power generation system as claimed in any one of claims 1 to 3, wherein: still include the evaporation power generation system, the evaporation power generation system is including steam turbine, condenser, condensate pump, heat pipe exchanger, oxygen-eliminating device, the main feed pump that links gradually, the steam inlet of steam turbine passes through the female union coupling of main steam the steam outlet of exhaust-heat boiler, exhaust-heat boiler is connected to the main feed pump.
5. The dry quenching waste heat power generation system of claim 4, wherein: the evaporation power generation system further comprises a drainage flash tank, the top of the drainage flash tank is connected with the vapor phase space of the condenser, the bottom of the drainage flash tank is connected with the liquid phase space of the condenser, and a spray port of the drainage flash tank is connected with a condensate pipe.
6. The dry quenching waste heat power generation system of claim 4, wherein: the evaporation power generation system further comprises a steam seal cooler, a pipe side of the steam seal cooler is connected with a condensate pipe, a shell side of the steam seal cooler is connected with an escape steam outlet of the steam turbine, and condensate water of the steam seal cooler automatically flows to a liquid phase space of the condenser.
7. The dry quenching waste heat power generation system of claim 4, wherein: the evaporation power generation system further comprises a steam seal gas source box, a steam inlet of the steam seal gas source box is connected with the main steam main pipe through a pipeline and a first regulating valve, a steam outlet of the steam seal gas source box is connected with a sealed gas source interface of the steam turbine, and a spraying port of the steam seal gas source box is connected with a condensate pipe through a pipeline and a second regulating valve.
8. The dry quenching waste heat power generation system of claim 4, wherein: still include the temperature and pressure reduction ware, the high temperature steam access connection of temperature and pressure reduction ware the female pipe of main steam, low temperature steam outlet connects outside steam conduit, as the balanced air supply of outside steam, the injection water source of temperature and pressure reduction ware by pipeline behind the main feed pump connects out.
9. The dry quenching waste heat power generation system of claim 8, wherein: the external steam pipeline is also connected with a steam extraction port of the steam turbine.
10. The dry quenching waste heat power generation system of claim 8, wherein: and a heating air source of the deaerator is provided by the external steam pipeline and/or a steam extraction port of the steam turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202121396862.2U CN215675138U (en) | 2021-06-23 | 2021-06-23 | Dry quenching waste heat power generation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121396862.2U CN215675138U (en) | 2021-06-23 | 2021-06-23 | Dry quenching waste heat power generation system |
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| CN215675138U true CN215675138U (en) | 2022-01-28 |
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| CN202121396862.2U Active CN215675138U (en) | 2021-06-23 | 2021-06-23 | Dry quenching waste heat power generation system |
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- 2021-06-23 CN CN202121396862.2U patent/CN215675138U/en active Active
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