CN113551533A - Sintering waste heat power generation device - Google Patents
Sintering waste heat power generation device Download PDFInfo
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- CN113551533A CN113551533A CN202110788644.1A CN202110788644A CN113551533A CN 113551533 A CN113551533 A CN 113551533A CN 202110788644 A CN202110788644 A CN 202110788644A CN 113551533 A CN113551533 A CN 113551533A
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- waste heat
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- 239000002918 waste heat Substances 0.000 title claims abstract description 102
- 238000005245 sintering Methods 0.000 title claims abstract description 67
- 238000010248 power generation Methods 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 74
- 239000000779 smoke Substances 0.000 claims description 48
- 229920006395 saturated elastomer Polymers 0.000 claims description 34
- 238000001816 cooling Methods 0.000 claims description 25
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 230000003584 silencer Effects 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 239000003517 fume Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims 10
- 239000000126 substance Substances 0.000 claims 2
- 238000004064 recycling Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 239000003638 chemical reducing agent Substances 0.000 description 13
- 239000003546 flue gas Substances 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
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- 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
-
- 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
- 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
- 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
- F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
- F27D15/02—Cooling
-
- 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
- F27D2017/006—Systems for reclaiming waste heat using a boiler
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2003/00—Type of treatment of the charge
- F27M2003/04—Sintering
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention provides a sintering waste heat power generation device which comprises a sintering circular cooler waste heat boiler, a sintering machine large flue waste heat boiler, a steam turbine and a condenser, wherein the sintering circular cooler waste heat boiler is connected with the steam turbine; the sintering ring cold machine waste heat boiler comprises a medium-pressure steam collecting device and a low-pressure steam collecting device; the medium-pressure steam collecting device comprises a medium-pressure superheater, a medium-pressure steam header, a medium-pressure steam drum, a medium-pressure-dividing evaporator and a medium-pressure economizer; the low-pressure steam collecting device comprises a low-pressure superheater, a low-pressure steam header, a low-pressure steam drum, a low-pressure evaporator, a deaerator and a low-pressure economizer. The large flue waste heat boiler of the sintering machine comprises a medium-pressure steam drum and a medium-pressure evaporator. The invention can solve the problem that in the process of recycling the waste heat of the boiler in the prior art, when the steam turbine stops working due to reasons such as faults, the steam turbine is not maintained in time, so that the working medium loss is caused; and when the steam conveyed to the steam turbine does not reach the standard, the normal work of the steam turbine is influenced, so that the steam turbine is damaged, and the like.
Description
Technical Field
The invention relates to the technical field of energy recycling equipment, in particular to a sintering waste heat power generation device.
Background
The sintering waste heat recovery system generally collects steam generated by a boiler, and then conveys the collected steam to a steam turbine for power generation through a pipeline, and exhaust steam generated during power generation of the steam turbine needs to be condensed by a condenser to generate condensed water and finally is discharged, so that the sintering waste heat is recycled.
At present, in the process of recycling and reusing the waste heat of a boiler, when the steam turbine stops working due to reasons such as faults, if the steam turbine is not maintained in time, the working medium loss is caused; when the steam conveyed to the steam turbine does not reach the standard, the normal work of the steam turbine is influenced, so that the steam turbine is damaged; during the shutdown period of the waste heat boiler of the sintering circular cooler, a large amount of steam of the large flue waste heat boiler is exhausted, and the boiler water supply cannot continuously run along with the sintering machine; and the problem of large configuration capacity of the circulating fan and the like.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a sintering waste heat power generation apparatus, so as to solve the problem that in the existing process of recycling boiler waste heat, when the steam turbine stops working due to reasons such as failure, if the steam turbine is not maintained in time, the working medium is lost; when the steam conveyed to the steam turbine does not reach the standard, the normal work of the steam turbine is influenced, so that the steam turbine is damaged; and the problem that the waste heat boiler with a large flue needs to continuously run along with the sintering machine during the shutdown period of the waste heat boiler of the sintering circular cooler is solved.
The invention provides a sintering waste heat power generation device which comprises a sintering circular cooler waste heat boiler, a steam turbine and a condenser; the sintering circular cooler waste heat boiler comprises a medium-pressure steam collecting device and a low-pressure steam collecting device; the medium pressure steam collection device includes: the system comprises a medium-pressure superheater, a medium-pressure steam header and a medium-pressure steam drum which are respectively connected with the medium-pressure superheater, and a medium-pressure evaporator and a medium-pressure economizer which are respectively connected with the medium-pressure steam drum; the low-pressure steam collecting device includes: the system comprises a low-pressure superheater, a low-pressure steam header and a low-pressure steam drum which are respectively connected with the low-pressure superheater, a low-pressure evaporator connected with the low-pressure steam drum, a deaerator arranged on the low-pressure steam drum, and a low-pressure economizer connected with the deaerator; the steam inlet of the steam turbine is respectively connected with the medium-pressure steam header and the low-pressure steam header through a medium-pressure steam pipeline and a low-pressure steam pipeline; the steam inlet of the condenser is connected with the steam outlet of the steam turbine; a bypass main pipeline is arranged at a bypass steam inlet of the condenser; a steam inlet of the bypass main pipeline is communicated with the medium-pressure steam pipeline and the low-pressure steam pipeline through a first bypass pipeline and a second bypass pipeline respectively; a first-stage bypass temperature and pressure reducing device is arranged on the first bypass pipeline; the primary bypass temperature and pressure reducing device is connected with a condensed water outlet of the condenser through a primary bypass pipeline, and a primary bypass temperature and pressure reducing valve bank is arranged on the primary bypass pipeline; a secondary bypass pipeline is arranged between a bypass steam inlet of the condenser and the primary bypass pipeline, and a secondary bypass desuperheating water valve group is arranged on the secondary bypass pipeline; and a secondary bypass temperature and pressure reducing device is arranged at a bypass steam inlet of the condenser.
In addition, the preferable scheme is that the system further comprises a sintering machine large flue waste heat boiler; the large flue waste heat boiler of the sintering machine comprises a large flue boiler drum and a large flue boiler evaporator connected with the large flue boiler drum; the water inlet of the large-flue boiler drum is respectively connected with the demineralized water tank and the water outlet of the low-pressure drum through a high-pressure water supply pipeline of the large-flue waste heat boiler; and a large-flue waste heat boiler water feeding pump is arranged on the large-flue waste heat boiler high-pressure water feeding pipeline.
In addition, the preferable scheme is that a water outlet of the low-pressure steam drum is connected with the medium-pressure economizer through a high-pressure water supply pipeline of the waste heat boiler of the circular cooler; a water feeding pump of the waste heat boiler of the annular cooler is arranged on the high-pressure water feeding pipeline of the waste heat boiler of the annular cooler; and a recirculation pipeline is arranged between the water inlet of the low-pressure steam drum and the high-pressure water supply pipeline of the waste heat boiler of the annular cooler, and a recirculation valve bank is arranged on the recirculation pipeline.
In addition, preferably, the steam outlet of the large-flue boiler drum is connected with the outlet saturated steam pipeline of the medium-pressure drum and the medium-pressure steam pipeline through a first saturated steam pipeline and a second saturated steam pipeline respectively; an outlet saturated steam pipeline of the medium-pressure steam drum is connected with the medium-pressure superheater; a main steam valve of the large-flue boiler is arranged at a steam outlet of the steam drum of the large-flue boiler; a first saturated steam valve is arranged on the first saturated steam pipeline; and a second saturated steam valve is arranged on the second saturated steam pipeline.
In addition, preferably, a steam supplementing regulating valve and a steam supplementing electric valve are arranged on the low-pressure steam pipeline close to a steam inlet of the steam turbine; and/or a main steam electric valve is arranged on the medium-pressure steam pipeline.
Preferably, a first electric valve is provided in the first bypass line; and/or a second electric valve is arranged on the second bypass pipeline; and/or a bypass regulating valve group is arranged on the bypass main pipeline; and/or a medium-pressure emptying valve group is arranged at the top of the medium-pressure steam header; and/or a low-pressure emptying valve group is arranged at the top of the low-pressure steam header.
In addition, preferably, a condensed water outlet of the condenser is connected to the low-pressure economizer through a condensed water pipe.
In addition, the preferable scheme is that the device also comprises a smoke exhaust system; wherein, the system of discharging fume includes: the device comprises an evacuation chimney, a smoke hood arranged below the evacuation chimney, an annular cooling air duct arranged below the smoke hood and a circulating fan outlet flue connected with an inlet of the annular cooling air duct; the evacuation chimney is communicated with the top of the sintering circular cooler waste heat boiler through a high-temperature flue; a smoke electric valve is arranged on the high-temperature flue; the outlet flue of the circulating fan is horizontally arranged; the inlet of the annular cooling air duct is communicated with the outlet flue of the circulating fan through a smoke inlet duct; the smoke inlet pipeline is respectively provided with an air door, a cooling fan, an electric adjusting air door, a cold air silencer and an electric switching air door; a circulating fan is arranged at a smoke inlet of the outlet flue of the circulating fan; the smoke inlet of the circulating fan is communicated with the bottom smoke outlet of the sintering circular cooler waste heat boiler through a circulating fan inlet flue; a chimney electric valve is arranged at the top end of the evacuation chimney; and the position and opening degree feedback signal of the chimney electric valve is connected with a variable frequency motor on the circulating fan.
In addition, the preferred scheme is that the evacuation chimney comprises a first-zone evacuation chimney and a second-zone evacuation chimney; the first-zone evacuation chimney and the second-zone evacuation chimney are respectively communicated with a smoke inlet at the top of the sintering circular cooler waste heat boiler through a first-zone high-temperature flue and a second-zone high-temperature flue; the smoke hood comprises a first-zone smoke hood arranged below the first-zone exhaust chimney and a second-zone smoke hood arranged below the second-zone exhaust chimney; at least two smoke inlet pipelines are arranged between the inlet of the annular cooling air duct and the outlet flue of the circulating fan.
Preferably, a flue lining is provided on an inner wall of the high-temperature flue.
According to the technical scheme, the sintering waste heat power generation device provided by the invention is characterized in that a bypass main pipeline is arranged at a bypass steam inlet of a condenser; a steam inlet of the bypass main pipeline is communicated with the medium-pressure steam pipeline and the low-pressure steam pipeline through a first bypass pipeline and a second bypass pipeline respectively; a first-stage bypass temperature and pressure reducing device is arranged on the first bypass pipeline; the primary bypass temperature and pressure reducing device is connected with a condensed water outlet of the condenser through a primary bypass pipeline, and a primary bypass temperature and pressure reducing valve bank is arranged on the primary bypass pipeline; a secondary bypass pipeline is arranged between a bypass steam inlet of the condenser and the primary bypass pipeline, and a secondary bypass temperature-reducing water valve group is arranged on the secondary bypass pipeline; the structural design who is provided with second grade bypass temperature and pressure reducer in the bypass steam import department of condenser, can be when steam turbine stop work, medium pressure steam and low pressure steam discharge into the condenser, do not influence going on that the waste heat was collected, reduce the working medium loss, simultaneously, when the cold quick-witted exhaust-heat boiler low-load of sintering ring, low pressure steam parameter does not reach standard, low pressure steam accessible second grade bypass temperature and pressure reducer discharges into the condenser, through first bypass pipeline, the both reducible working medium losses of two-stage bypass temperature and pressure reducer, but also can make things convenient for the system to operate.
To the accomplishment of the foregoing and related ends, one or more aspects of the invention comprise the features hereinafter fully described. The following description and the annexed drawings set forth in detail certain illustrative aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Further, the present invention is intended to include all such aspects and their equivalents.
Drawings
Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 is a schematic structural diagram of a sintering waste heat power generation device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a smoke evacuation system according to an embodiment of the present invention.
In the attached drawing, 1-sintering circular cooler waste heat boiler, 111-medium pressure superheater, 112-medium pressure steam header, 113-medium pressure steam drum, 114-medium pressure evaporator, 115-medium pressure economizer, 121-low pressure superheater, 122-low pressure steam header, 123-low pressure steam drum, 124-low pressure evaporator, 125-deaerator, 126-low pressure economizer, 13-medium pressure steam pipeline, 131-main steam electric valve, 14-low pressure steam pipeline, 141-steam make-up regulating valve, 142-steam make-up electric valve, 15-circular cooler waste heat boiler high pressure water supply pipeline, 151-circular cooler waste heat boiler water supply pump, 16-recondensing water pipeline, 161-recirculation valve bank, 17-medium pressure emptying valve bank, 18-emptying low pressure valve bank, 2-steam turbine, 3-a condenser, 31-a bypass main pipeline, 311-a bypass regulating valve group, 32-a first bypass pipeline, 321-a first electric valve, 33-a second bypass pipeline, 331-a second electric valve, 34-a condensed water pipeline, 41-a first-level bypass temperature and pressure reducer, 42-a first-level bypass pipeline, 43-a first-level bypass temperature and pressure reducing valve group, 51-a second-level bypass pipeline, 52-a second-level bypass temperature and pressure reducing valve group, 53-a second-level bypass temperature and pressure reducer, 61-a large-flue boiler steam pocket, 62-a large-flue boiler evaporator, 63-a large-flue waste heat boiler high-pressure water supply pipeline, 64-a large-flue waste heat boiler water supply pump, 65-a first saturated steam pipeline, 66-a large-flue boiler main steam valve, 67-a second saturated steam pipeline, and 7-a brine tank, 81-circulating fan outlet flue, 82-flue gas electric valve, 83-circulating fan, 831-variable frequency motor, 84-circulating fan inlet flue, 85-chimney electric valve, 861-first region evacuation chimney, 862-second region evacuation chimney, 871-first region high temperature flue, 872-second region high temperature flue, 881-first region smoke hood, 882-second region smoke hood, 89-lining, 9-smoke inlet pipeline, 91-air door, 92-cooling fan, 93-electric regulating air door, 94-cold air silencer, 95-electric switching air door and 96-annular cooling air duct of annular cooling machine.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details.
Aiming at the problems that in the existing process of recycling and reusing the waste heat of the boiler, when the steam turbine stops working due to reasons such as faults, if the steam turbine is not maintained in time, the working medium is lost; when the steam conveyed to the steam turbine does not reach the standard, the normal work of the steam turbine is influenced, so that the steam turbine is damaged; when the sintering circular cooler boiler is stopped, a large amount of steam of the large-flue waste heat boiler is exhausted, and the boiler water supply can not continuously run along with the sintering machine for a long time; the problem that the capacity of a circulating fan is large, the original cooling fan cannot be replaced and the like is solved, and the sintering waste heat power generation device is provided.
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In order to explain the sintering waste heat power generation device provided by the invention, fig. 1 shows the structure of the sintering waste heat power generation device according to the embodiment of the invention; fig. 2 shows the structure of a smoke evacuation system according to an embodiment of the present invention.
As shown in fig. 1 and fig. 2, the sintering waste heat power generation device provided by the invention comprises a sintering circular cooler waste heat boiler 1, a steam turbine 2 and a condenser 3; the sintering circular cooler waste heat boiler 1 comprises a medium-pressure steam collecting device and a low-pressure steam collecting device; the medium pressure steam collection device includes: the system comprises a medium-pressure superheater 111, a medium-pressure steam header 112 and a medium-pressure steam drum 113 which are respectively connected with the medium-pressure superheater 111, and a medium-pressure evaporator 114 and a medium-pressure economizer 115 which are respectively connected with the medium-pressure steam drum 113;
the low-pressure steam collecting device includes: the system comprises a low-pressure superheater 121, a low-pressure steam header 122 and a low-pressure steam drum 123 which are respectively connected with the low-pressure superheater 121, a low-pressure evaporator 124 connected with the low-pressure steam drum 123, a deaerator 125 arranged on the low-pressure steam drum 123, and a low-pressure economizer 126 connected with the deaerator 125;
the steam inlet of the steam turbine 2 is connected with a medium-pressure steam header 112 and a low-pressure steam header 122 through a medium-pressure steam pipeline 13 and a low-pressure steam pipeline 14 respectively;
the steam inlet of the condenser 3 is connected with the steam outlet of the steam turbine 2; a bypass main pipeline 31 is arranged at a bypass steam inlet of the condenser 3; the steam inlet of the bypass main conduit 31 communicates with the medium-pressure steam conduit 13 and the low-pressure steam conduit 14 through a first bypass conduit 32 and a second bypass conduit 33, respectively;
a first-stage bypass temperature and pressure reducer 41 is arranged on the first bypass pipeline 32; the primary bypass temperature and pressure reducing device 41 is connected with a condensed water outlet of the condenser 3 through a primary bypass pipeline 42, and a primary bypass temperature and pressure reducing valve bank 43 is arranged on the primary bypass pipeline 41; a secondary bypass pipeline 51 is arranged between a bypass steam inlet of the condenser 3 and the primary bypass pipeline 42, and a secondary bypass desuperheating water valve bank 52 is arranged on the secondary bypass pipeline 51; a secondary bypass temperature and pressure reducer 53 is arranged at a bypass steam inlet of the condenser 2.
A bypass main pipeline 31 is arranged at a bypass steam inlet of the condenser 3; the steam inlet of the bypass main conduit 31 communicates with the medium-pressure steam conduit 13 and the low-pressure steam conduit 14 through a first bypass conduit 32 and a second bypass conduit 33, respectively; a first-stage bypass temperature and pressure reducer 41 is arranged on the first bypass pipeline 32; the primary bypass temperature and pressure reducing device 41 is connected with a condensed water outlet of the condenser 3 through a primary bypass pipeline 42, and a primary bypass temperature and pressure reducing valve bank 43 is arranged on the primary bypass pipeline 42; a secondary bypass pipeline 51 is arranged between a bypass steam inlet of the condenser 3 and the primary bypass pipeline 42, and a secondary bypass desuperheating water valve bank 52 is arranged on the secondary bypass pipeline 51; the structural design that the secondary bypass temperature and pressure reducing device 53 is arranged at the bypass steam inlet of the condenser 3 can discharge medium-pressure steam and low-pressure steam into the condenser 3 when the steam turbine 2 stops working, so that the continuous operation of waste heat collection is not influenced, and the loss of working media is reduced; meanwhile, when the sintering ring cold machine waste heat boiler 1 is low-load and the low-pressure steam parameters do not reach the standard, the low-pressure steam can be discharged into the condenser 3 through the second-stage bypass temperature and pressure reducer 53, the working medium loss can be reduced through the first bypass pipeline 32 and the second-stage bypass temperature and pressure reducer, and the system can be conveniently operated.
As a preferred scheme of the invention, the invention also comprises a sintering machine large flue waste heat boiler; the large flue waste heat boiler of the sintering machine comprises a large flue boiler drum 61 and a large flue boiler evaporator 62 connected with the large flue boiler drum 61; the water inlet of the large-flue boiler drum 61 is respectively connected with the demineralized water tank 7 and the water outlet of the low-pressure drum 123 through a large-flue waste heat boiler high-pressure water supply pipeline 63; a large flue waste heat boiler feed water pump 64 is arranged on the large flue waste heat boiler high-pressure feed water pipeline 63. The combustion system can burn more thoroughly by arranging the large flue waste heat boiler. The circular cooler waste heat boiler 1 and the large flue waste heat boiler are respectively provided with a water feeding pump. The large flue boiler is provided with a desalting water tank 7 as a standby water source, so that when the circular cooler waste heat boiler 1 is overhauled, the water supply reliability of the large flue waste heat boiler is ensured, the large flue boiler can continuously run along with a sintering machine, and the reliable running of the sintering machine is guaranteed. The feed water of the large flue boiler is provided with a 7-tank demineralized water recirculation system, so that the large flue boiler can operate independently.
As a preferred scheme of the invention, the water outlet of the low-pressure steam pocket 123 is connected with the medium-pressure economizer 115 through a high-pressure water supply pipeline 15 of the waste heat boiler of the circular cooler; a water feed pump 151 of the waste heat boiler of the annular cooler is arranged on the high-pressure water feed pipeline 15 of the waste heat boiler of the annular cooler; a recirculation pipeline 16 is arranged between the water inlet of the low-pressure steam drum 123 and the high-pressure water supply pipeline 15 of the waste heat boiler of the circular cooler, and a recirculation valve set 161 is arranged on the recirculation pipeline 16. The water produced by the low pressure drum 123 is fully utilized and the temperature can be ensured by the recirculation line 16.
As a preferable scheme of the present invention, the steam outlet of the large flue boiler drum 61 is connected with the outlet saturated steam pipeline of the medium pressure drum 113 and the medium pressure steam pipeline 13 through a first saturated steam pipeline 65 and a second saturated steam pipeline 67, respectively; an outlet saturated steam pipeline of the medium-pressure steam drum 113 is connected with the medium-pressure superheater 111; a main steam valve 66 of the large-flue boiler is arranged at a steam outlet of the large-flue boiler steam drum 61; a first saturated steam valve is arranged on the first saturated steam pipeline 65; a second saturated steam valve is provided on the second saturated steam pipe 67.
The steam outlet of the large flue boiler drum 61 is connected with the outlet saturated steam pipeline of the medium pressure drum 113 through the first saturated steam pipeline 65, enters the medium pressure superheater 111 through the outlet saturated steam pipeline of the medium pressure drum 113, is superheated and then enters the medium pressure steam header together, and is input into the steam turbine 2 through the medium pressure steam pipeline 13 for power generation; the steam outlet of the large flue boiler drum 61 is directly connected with the medium-pressure steam pipeline 13 through the second saturated steam pipeline 67, and when the circular cooler waste heat boiler stops working, the normal utilization of the steam in the large flue boiler drum 61 is ensured.
As a preferable aspect of the present invention, a steam supply regulating valve 141 and a steam supply electric valve 142 are provided on the low pressure steam pipe 14 near the steam inlet of the steam turbine 2; and/or a main steam electric valve 131 is arranged on the middle-pressure steam pipeline 13. The steam supply adjusting valve 141 and the steam supply electric valve 142 are arranged to control the amount of the supplied steam of the low-pressure steam pipeline 14; the main steam electric valve 131 is used for controlling the steam flow of the medium-pressure steam pipeline 13.
As a preferred aspect of the present invention, a first electric valve 321 is provided in the first bypass pipe 32; and/or, a second electric valve 331 is provided on the second bypass pipe 33; and/or, a bypass regulating valve group 311 is arranged on the bypass main pipeline 31; and/or, a medium pressure emptying valve group 17 is arranged at the top of the medium pressure steam header 112; and/or, a low pressure exhaust valve bank 18 is provided at the top of the low pressure steam header 122. The air exhaust parameters and the working pressure of the boiler can be adjusted according to the working conditions of debugging, starting, stopping, accidents and the like.
In a preferred embodiment of the present invention, the condensed water outlet of the condenser 3 is connected to the low-pressure economizer 126 through a condensed water pipe 34. The condensate water is convenient to recycle.
As a preferable scheme of the invention, the device also comprises a smoke exhaust system; wherein, the system of discharging fume includes: the device comprises an evacuation chimney, a smoke hood arranged below the evacuation chimney, an annular cooling air duct 96 of the annular cooler arranged below the smoke hood and a circulating fan outlet flue 81 connected with an inlet of the annular cooling air duct 96; the evacuation chimney is communicated with the top of the sintering circular cooler waste heat boiler 1 through a high-temperature flue; a flue gas electric valve 82 is arranged on the high-temperature flue; the circulating fan outlet flue 81 is horizontally arranged; the inlet of the annular cooling air duct 96 of the circular cooler is communicated with the outlet flue 81 of the circulating fan through a smoke inlet duct 9; the smoke inlet pipeline 9 is respectively provided with an air door 91, a cooling fan 92, an electric adjusting air door 93, a cold air silencer 94 and an electric switching air door 95; a circulating fan 83 is arranged at the smoke inlet of the outlet flue 81 of the circulating fan; the smoke inlet of the circulating fan 83 is communicated with the bottom smoke outlet of the sintering circular cooler waste heat boiler 1 through a circulating fan inlet flue 84; a chimney electric valve 85 is arranged at the top end of the evacuation chimney; an inverter motor 831 is connected to the circulating fan 83.
The variable-frequency circulating fan 83 is connected with the cooling fan 92 in series, an outdoor air suction inlet can be arranged at the inlet of the cooling fan 92, and the circular cooler is normal when the circular cooling waste heat boiler is stopped. The flue gas flow and the flue gas temperature at the inlet of the boiler can be adjusted by adjusting the rotating speed of the circulating fan, the capacity of the motor is greatly reduced, the investment is low, and the influence of a waste heat recovery system on the circular cooler is reduced.
As a preferable aspect of the present invention, the evacuation chimney includes a first-zone evacuation chimney 861 and a second-zone evacuation chimney 862; the first-area evacuation chimney 861 and the second-area evacuation chimney 862 are respectively communicated with a smoke inlet at the top of the sintering circular cooler waste heat boiler 1 through a first-area high-temperature flue 871 and a second-area high-temperature flue 872; the smoke hood comprises a first area smoke hood 881 arranged below the first area exhaust chimney 861 and a second area smoke hood 882 arranged below the second area exhaust chimney 862; at least two smoke inlet pipelines 9 are arranged between the inlet of the annular cooling air duct 96 and the outlet flue of the circulating fan. . Through the above structural design, the flue gas treatment speed can be increased.
As a preferable scheme of the invention, a flue lining 89 is arranged on the inner side wall of the high-temperature flue; and the electric valve of the chimney is provided with a middle stop position and opening degree feedback signal.
The flue is internally provided with a lining 89, the heat resistance can reach over 600 ℃, and the overtemperature of the flue material is avoided or high-grade heat-resistant steel is selected. Under the condition of meeting the requirements of heat insulation and wear resistance and ensuring the safety of flue materials, the heat dissipation capacity can be reduced, the temperature drop of flue gas is reduced, and the evaporation capacity of a boiler and the generating power of a unit are provided. The first-area evacuation chimney 861 and the second-area evacuation chimney 862 adopt electric valves with middle stop and opening degree feedback signals, and in extreme working conditions, when smoke is over-temperature, outdoor air can be supplemented by opening the first-area evacuation chimney 861 and the second-area evacuation chimney 862 through the electric valves, so that the smoke is prevented from being over-temperature to damage a flue and a sintering ring cold waste heat boiler.
According to the sintering waste heat power generation device provided by the invention, the bypass main pipeline is arranged at the bypass steam inlet of the condenser; a steam inlet of the bypass main pipeline is communicated with the medium-pressure steam pipeline and the low-pressure steam pipeline through a first bypass pipeline and a second bypass pipeline respectively; a first-stage bypass temperature and pressure reducing device is arranged on the first bypass pipeline; the primary bypass temperature and pressure reducing device is connected with a condensed water outlet of the condenser through a primary bypass pipeline, and a primary bypass temperature and pressure reducing valve bank is arranged on the primary bypass pipeline; a secondary bypass pipeline is arranged between a bypass steam inlet of the condenser and the primary bypass pipeline, and a secondary bypass temperature-reducing water valve group is arranged on the secondary bypass pipeline; the structural design who is provided with second grade bypass temperature and pressure reducer in the bypass steam import department of condenser, can be when steam turbine stop work, medium pressure steam and low pressure steam discharge into the condenser, do not influence going on that the waste heat was collected, reduce the working medium loss, simultaneously, when the cold quick-witted exhaust-heat boiler low-load of sintering ring, low pressure steam parameter does not reach standard, low pressure steam accessible second grade bypass temperature and pressure reducer discharges into the condenser, through first bypass pipeline, the both reducible working medium losses of two-stage bypass temperature and pressure reducer, but also can make things convenient for the system to operate.
The second saturated steam pipeline arranged between the saturated steam pipeline at the steam outlet of the steam drum of the large-flue boiler and the medium-pressure steam pipeline can ensure that saturated steam produced by the large-flue boiler can directly enter the medium-pressure steam pipeline through the second saturated steam pipeline when the circular cooler waste heat boiler is stopped; the standby demineralized water tank of the large-flue boiler and the water supply recycling are arranged, so that the water supply source of the ring cooling boiler during the shutdown period can be ensured; the two inventions can solve the problem that the large flue boiler of the annular cooling boiler is stopped to continuously run along with the sintering machine.
The sintering waste heat power generation device proposed according to the present invention is described above by way of example with reference to the accompanying drawings. However, it should be understood by those skilled in the art that various modifications can be made to the sintering waste heat power generation device provided by the invention without departing from the scope of the invention. Therefore, the scope of the present invention should be determined by the contents of the appended claims.
Claims (10)
1. A power generation device by using sintering waste heat is characterized by comprising a sintering circular cooler waste heat boiler, a steam turbine and a condenser; wherein the content of the first and second substances,
the sintering ring cold machine waste heat boiler comprises a medium-pressure steam collecting device and a low-pressure steam collecting device;
the medium pressure steam collection device includes: the system comprises a medium-pressure superheater, a medium-pressure steam header and a medium-pressure steam drum which are respectively connected with the medium-pressure superheater, and a medium-pressure evaporator and a medium-pressure economizer which are respectively connected with the medium-pressure steam drum;
the low-pressure steam collecting device includes: the system comprises a low-pressure superheater, a low-pressure steam header and a low-pressure steam drum which are respectively connected with the low-pressure superheater, a low-pressure evaporator connected with the low-pressure steam drum, a deaerator arranged on the low-pressure steam drum, and a low-pressure economizer connected with the deaerator;
the steam inlet of the steam turbine is respectively connected with the medium-pressure steam header and the low-pressure steam header through a medium-pressure steam pipeline and a low-pressure steam pipeline;
the steam inlet of the condenser is connected with the steam outlet of the steam turbine; a bypass main pipeline is arranged at a bypass steam inlet of the condenser; a steam inlet of the bypass main pipeline is communicated with the medium-pressure steam pipeline and the low-pressure steam pipeline through a first bypass pipeline and a second bypass pipeline respectively;
a first-stage bypass temperature and pressure reducing device is arranged on the first bypass pipeline; the primary bypass temperature and pressure reducing device is connected with a condensed water outlet of the condenser through a primary bypass pipeline, and a primary bypass temperature and pressure reducing valve bank is arranged on the primary bypass pipeline; a secondary bypass pipeline is arranged between a bypass steam inlet of the condenser and the primary bypass pipeline, and a secondary bypass desuperheating water valve group is arranged on the secondary bypass pipeline; and a secondary bypass temperature and pressure reducing device is arranged at a bypass steam inlet of the condenser.
2. The sintering waste heat power generation device according to claim 1, further comprising a sintering machine large flue waste heat boiler;
the large flue waste heat boiler of the sintering machine comprises a large flue boiler drum and a large flue boiler evaporator connected with the large flue boiler drum; the water inlet of the large-flue boiler drum is respectively connected with the demineralized water tank and the water outlet of the low-pressure drum through a high-pressure water supply pipeline of the large-flue waste heat boiler; and a large-flue waste heat boiler water feeding pump is arranged on the large-flue waste heat boiler high-pressure water feeding pipeline.
3. The sintering waste heat power generation device according to claim 2,
the water outlet of the low-pressure steam drum is connected with the medium-pressure economizer through a high-pressure water supply pipeline of the waste heat boiler of the circular cooler; a water feeding pump of the waste heat boiler of the annular cooler is arranged on the high-pressure water feeding pipeline of the waste heat boiler of the annular cooler; and a recirculation pipeline is arranged between the water inlet of the low-pressure steam drum and the high-pressure water supply pipeline of the waste heat boiler of the annular cooler, and a recirculation valve bank is arranged on the recirculation pipeline.
4. The sintering waste heat power generation device according to claim 2,
the steam outlet of the large-flue boiler drum is respectively connected with the outlet saturated steam pipeline of the medium-pressure drum and the medium-pressure steam pipeline through a first saturated steam pipeline and a second saturated steam pipeline;
an outlet saturated steam pipeline of the medium-pressure steam drum is connected with the medium-pressure superheater;
a main steam valve of the large-flue boiler is arranged at a steam outlet of the steam drum of the large-flue boiler;
a first saturated steam valve is arranged on the first saturated steam pipeline;
and a second saturated steam valve is arranged on the second saturated steam pipeline.
5. The sintering waste heat power generation device according to claim 1,
a steam supplementing adjusting valve and a steam supplementing electric valve are arranged on the low-pressure steam pipeline close to a steam inlet of the steam turbine; and/or the presence of a gas in the gas,
and a main steam electric valve is arranged on the medium-pressure steam pipeline.
6. The sintering waste heat power generation device according to claim 1,
a first electric valve is arranged on the first bypass pipeline; and/or the presence of a gas in the gas,
a second electric valve is arranged on the second bypass pipeline; and/or the presence of a gas in the gas,
a bypass regulating valve group is arranged on the bypass main pipeline; and/or the presence of a gas in the gas,
a medium-pressure emptying valve group is arranged at the top of the medium-pressure steam header; and/or the presence of a gas in the gas,
and a low-pressure emptying valve group is arranged at the top of the low-pressure steam header.
7. The sintering waste heat power generation device according to claim 1,
and a condensed water outlet of the condenser is connected with the low-pressure economizer through a condensed water pipeline.
8. The sintering waste heat power generation device according to claim 1, further comprising a smoke exhaust system; wherein the content of the first and second substances,
the fume exhaust system includes: the device comprises an evacuation chimney, a smoke hood arranged below the evacuation chimney, an annular cooling air duct of the annular cooling machine arranged below the smoke hood and a circulating fan outlet flue connected with an inlet of the annular cooling air duct;
the evacuation chimney is communicated with the top of the sintering circular cooler waste heat boiler through a high-temperature flue; a smoke electric valve is arranged on the high-temperature flue;
the outlet flue of the circulating fan is horizontally arranged; the inlet of the annular cooling air duct of the circular cooler is communicated with the outlet flue of the circulating fan through a smoke inlet duct; the smoke inlet pipeline is respectively provided with an air door, a cooling fan, an electric adjusting air door, a cold air silencer and an electric switching air door;
a circulating fan is arranged at a smoke inlet of the outlet flue of the circulating fan; the smoke inlet of the circulating fan is communicated with the bottom smoke outlet of the sintering circular cooler waste heat boiler through a circulating fan inlet flue;
a chimney electric valve is arranged at the top end of the evacuation chimney, and a signal is fed back by the position and the opening degree of the chimney electric valve;
and the circulating fan is connected with a variable frequency motor.
9. The sintering waste heat power generation device according to claim 8,
the evacuation chimney comprises a first-zone evacuation chimney and a second-zone evacuation chimney;
the first-zone evacuation chimney and the second-zone evacuation chimney are respectively communicated with a smoke inlet at the top of the sintering circular cooler waste heat boiler through a first-zone high-temperature flue and a second-zone high-temperature flue;
the smoke hood comprises a first-zone smoke hood arranged below the first-zone exhaust chimney and a second-zone smoke hood arranged below the second-zone exhaust chimney;
at least two smoke inlet pipelines are arranged between the inlet of the annular cooling air duct of the circular cooler and the outlet flue of the circulating fan.
10. The sintering waste heat power generation device according to claim 8, wherein a flue lining is provided on an inner side wall of the high temperature flue.
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| CN202110788644.1A CN113551533A (en) | 2021-07-13 | 2021-07-13 | Sintering waste heat power generation device |
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| CN202110788644.1A CN113551533A (en) | 2021-07-13 | 2021-07-13 | Sintering waste heat power generation device |
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Effective date of registration: 20220914 Address after: 100176, No. 1, Kangding street, Daxing District economic and Technological Development Zone, Beijing, B2 Applicant after: CHINA HUAYE GROUP Co.,Ltd. Applicant after: TIANJIN HUAYE ENGINEERING DESIGN Co.,Ltd. Address before: Building B2, No. 1 Kangding Street, Beijing Economic and Technological Development Zone, Daxing District Applicant before: CHINA HUAYE GROUP Co.,Ltd. |
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