CN113237353A - Dust fall heating system of cement kiln exhaust-heat boiler - Google Patents
Dust fall heating system of cement kiln exhaust-heat boiler Download PDFInfo
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- CN113237353A CN113237353A CN202110646555.3A CN202110646555A CN113237353A CN 113237353 A CN113237353 A CN 113237353A CN 202110646555 A CN202110646555 A CN 202110646555A CN 113237353 A CN113237353 A CN 113237353A
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- superheater
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- heat boiler
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- 239000004568 cement Substances 0.000 title claims abstract description 71
- 239000000428 dust Substances 0.000 title claims abstract description 71
- 238000010438 heat treatment Methods 0.000 title claims abstract description 66
- 239000002918 waste heat Substances 0.000 claims abstract description 95
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 84
- 239000003546 flue gas Substances 0.000 claims abstract description 84
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 37
- 239000012528 membrane Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000017525 heat dissipation Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 7
- 239000002245 particle Substances 0.000 description 7
- 238000001914 filtration Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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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
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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
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
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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
- F27D2017/006—Systems for reclaiming waste heat using a boiler
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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 dust-fall heating system of a cement kiln waste heat boiler, which is applied to the technical field of the cement kiln waste heat boiler, wherein a cement kiln system (1) of the dust-fall heating system of the cement kiln waste heat boiler is communicated with a high-temperature ultra-low-speed cyclone dust-fall superheater (3), a high-temperature flue gas outlet (23) of the high-temperature ultra-low-speed cyclone dust-fall superheater (3) is communicated with a waste heat boiler (2), the cement kiln system (1) is communicated with a medium-temperature ultra-low-speed cyclone dust-fall superheater (5), a medium-temperature flue gas outlet (7) is communicated with the waste heat boiler (2), the waste heat boiler (2) is communicated with a saturated steam inlet (9) of the medium-temperature ultra-low-speed cyclone dust-fall superheater (5) through a saturated steam pipeline (8), the dust-fall heating system of the cement kiln waste heat boiler can remove dust from flue gas and perform heat exchange on a heating surface to improve the waste heat utilization rate of the cement waste heat boiler, the heat dissipation rate of the settling chamber is reduced, and the waste heat utilization rate of the cement waste heat boiler is improved from two aspects of equipment structure and process flow.
Description
Technical Field
The invention belongs to the technical field of cement kiln waste heat boilers, and particularly relates to a dust fall heating system of a cement kiln waste heat boiler.
Background
The cement waste heat boiler utilizes waste gas containing dust which is clinker particles and has no adhesion, the hardness of the clinker particles is higher, in order to reduce the content of dust entering the boiler and reduce the abrasion of the clinker particles on a heat transfer pipe of a heating surface of the boiler, a settling chamber is arranged in a front section air pipe of an inlet of the AQC boiler (waste heat boiler), and the settled clinker particles are conveyed to a kiln system through a lower ash bucket through a zipper machine. The traditional gravity settling chamber is characterized in that after dust-containing airflow enters the settling chamber through a connecting flue at a certain speed, the speed is reduced due to the expansion of the flow cross section area, and dust particles in the airflow move along the horizontal direction along with the airflow on one hand and vertically move downwards at a certain settling speed under the action of gravity on the other hand. When the passage time of the dusty gas stream in the settling chamber is longer than the time required for the dust particles to fall at their own settling velocity, the dust particles are separated. The performance of the gravity settling chamber, including dust collection efficiency, air leakage rate, heat dissipation rate and the self-problems of the equipment during operation, can influence the operation of the whole cement kiln waste heat power generation system. The dust concentration of the flue gas entering the boiler depends on the dust removal efficiency of the settling chamber, if the dust removal efficiency of the settling chamber is not informed, the unsettled dust enters the boiler along with the air flow, the abrasion of the heating surface of the boiler is increased, and the heat exchange efficiency and the service life of the boiler are influenced. If the air leakage rate and the heat dissipation rate of the settling chamber are higher, the total heat entering the boiler is reduced, the waste heat utilization rate is reduced, and the efficiency and the economy of the waste heat power generation system are influenced.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the dust collector is combined with the heating surface, so that dust can be removed from smoke, heat exchange can be carried out on the heating surface, the waste heat utilization rate of the cement waste heat boiler is improved, the heat dissipation rate of a settling chamber is reduced, and the waste heat utilization rate of the cement waste heat boiler is improved from two aspects of equipment structure and process flow.
To solve the technical problems, the invention adopts the technical scheme that:
the invention relates to a dust-settling heating system of a cement kiln waste heat boiler, which comprises a cement kiln system, the waste heat boiler is characterized in that a high-temperature section air taking port of a cement kiln system is communicated with a high-temperature flue gas inlet of a high-temperature ultra-low-speed cyclone dust-falling superheater, a high-temperature flue gas outlet of the high-temperature ultra-low-speed cyclone dust-falling superheater is communicated with the waste heat boiler, a medium-temperature section air taking port of the cement kiln system is communicated with a medium-temperature flue gas inlet of a medium-temperature ultra-low-speed cyclone dust-falling superheater, a medium-temperature flue gas outlet of the medium-temperature ultra-low-speed cyclone dust-falling superheater is communicated with the waste heat boiler, the waste heat boiler is communicated with a saturated steam inlet of the medium-temperature ultra-low-speed cyclone dust-falling superheater through a saturated steam pipeline, a superheated steam outlet I of the medium-temperature ultra-low-speed cyclone dust-falling superheater is communicated with a superheated steam inlet of the high-temperature ultra-low-speed cyclone dust-falling superheater, and a superheated steam outlet II is further arranged on the high-temperature ultra-low-speed cyclone dust-falling superheater.
The high-temperature ultra-low-speed cyclone dust-falling superheater is characterized in that an overheated steam pipeline is arranged in the high-temperature ultra-low-speed cyclone dust-falling superheater, one end of the overheated steam pipeline is communicated with an overheated steam inlet, the other end of the overheated steam pipeline is communicated with an overheated steam outlet II, the high-temperature ultra-low-speed cyclone dust-falling superheater comprises a membrane wall type superheater cylinder wall I, and a fin tube bundle I is arranged in the superheater cylinder wall I.
A saturated steam pipeline is arranged in the medium-temperature ultra-low-speed cyclone dust-falling superheater, one end of the saturated steam pipeline is communicated with a saturated steam inlet, the other end of the saturated steam pipeline is communicated with a superheated steam outlet I, the medium-temperature ultra-low-speed cyclone dust-falling superheater comprises a membrane wall type superheater cylinder wall II, and a fin tube bundle II is arranged in the superheater cylinder wall II.
And the lower end of the high-temperature ultra-low-speed cyclone dust-settling superheater is provided with an ash hopper I.
And an ash hopper II is arranged at the lower end of the medium-temperature ultra-low-speed cyclone dust-settling superheater.
The high-temperature-section air intake port of the cement kiln system is communicated with a high-temperature flue gas inlet of the high-temperature ultra-low-speed cyclone dust-falling superheater through a flue gas pipeline I, and the medium-temperature-section air intake port of the cement kiln system is communicated with a medium-temperature flue gas inlet of the medium-temperature ultra-low-speed cyclone dust-falling superheater through a flue gas pipeline II.
The high-temperature flue gas outlet of the high-temperature ultra-low-speed cyclone dust-falling superheater is communicated with the waste heat boiler through a flue gas pipeline III, the middle-temperature section air intake of the cement kiln system is communicated with the middle-temperature flue gas inlet of the middle-temperature ultra-low-speed cyclone dust-falling superheater through a flue gas pipeline IV, and the middle-temperature flue gas outlet of the middle-temperature ultra-low-speed cyclone dust-falling superheater is communicated with the waste heat boiler through a flue gas pipeline V.
The medium-temperature ultra-low-speed cyclone dust-settling superheater is of a structure capable of heating saturated steam and steam-water input by the waste heat boiler to superheated steam in a mixed mode, and the high-temperature ultra-low-speed cyclone dust-settling superheater is of a structure capable of further heating the superheated steam input by the medium-temperature ultra-low-speed cyclone dust-settling superheater to improve the temperature of the superheated steam.
A heating medium pipeline is arranged in the waste heat boiler, and a heating medium pipeline outlet of the heating medium pipeline is communicated with a saturated steam inlet of the medium-temperature ultra-low-speed cyclone dust-falling superheater through a saturated steam pipeline.
The lower end of an ash bucket I of the dust-settling heating system of the cement kiln waste heat boiler is provided with an ash discharge valve I, and the lower end of an ash bucket II is provided with an ash discharge valve II.
By adopting the technical scheme of the invention, the following beneficial effects can be obtained:
in the dust fall heating system of the cement kiln waste heat boiler, high-temperature flue gas is led to a high-temperature ultra-low-speed cyclone dust fall superheater from a high-temperature section air intake port of the cement kiln system through a flue gas pipeline in the dust fall treatment process, and dust-containing flue gas is subjected to cyclone filtration, dust fall and temperature reduction through the high-temperature ultra-low-speed cyclone dust fall superheater and enters a kiln head waste heat boiler (AQC waste heat boiler). The medium-temperature flue gas is led to a medium-temperature ultra-low speed cyclone dust-settling superheater from a medium-temperature section air intake of the cement kiln system through a flue gas pipeline, and the dust-containing flue gas is subjected to cyclone filtration dust-settling and cooling through the medium-temperature ultra-low speed cyclone dust-settling superheater and then enters a kiln head AQC waste heat boiler. Heating a heated medium in a waste heat boiler to be full through an AQC boiler, then enabling a mixture of saturated steam and steam to enter a medium-temperature ultra-low-speed cyclone dust-settling superheater, heating the saturated steam through the medium-temperature ultra-low-speed cyclone dust-settling superheater to form superheated steam, enabling the superheated steam to enter a high-temperature ultra-low-speed cyclone superheater for further heating, improving parameters of the superheated steam, and then discharging the superheated steam. According to the dust-settling heating system of the cement kiln waste heat boiler, the dust collector is combined with the heating surface, so that dust can be removed from smoke, heat exchange can be carried out on the heating surface, the waste heat utilization rate of the cement waste heat boiler is improved, the heat dissipation rate of a settling chamber is reduced, and the waste heat utilization rate of the cement waste heat boiler is improved from two aspects of equipment structure and process flow.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
FIG. 1 is a schematic structural diagram of a dust fall heating system of a cement kiln waste heat boiler according to the invention;
FIG. 2 is a schematic structural diagram of a high-temperature ultra-low-speed cyclone dust-settling superheater of a cement kiln waste heat boiler dust-settling heating system;
FIG. 3 is a schematic structural diagram of a medium-temperature ultra-low-speed cyclone dust-settling superheater of a cement kiln waste heat boiler dust-settling heating system;
in the drawings, the reference numbers are respectively: 1. a cement kiln system; 2. a waste heat boiler; 3. a high-temperature ultra-low-speed cyclone dust settling superheater; 4. a high temperature flue gas inlet; 5. a medium-temperature ultra-low-speed cyclone dust-settling superheater; 6. a medium-temperature flue gas inlet; 7. a medium-temperature flue gas outlet; 8. a steam line; 9. a saturated steam inlet; 10. a superheated steam outlet I; 11. a superheated steam inlet; 12. a superheated steam outlet II; 13. the wall of the superheater tube I; 14. a superheater tube wall II; 15. an ash hopper I; 16. an ash bucket II; 17. a flue gas pipeline I; 18. a flue gas pipeline II; 19. a flue gas pipeline III; 20. a flue gas pipeline IV; 21. a flue gas pipeline V; 22. a heating medium line outlet; 23. a high-temperature flue gas outlet; 24. and a fin tube bundle I.
Detailed Description
The following detailed description of the embodiments of the present invention, such as the shapes and structures of the components, the mutual positions and connection relations among the components, the functions and operation principles of the components, will be made by referring to the accompanying drawings and the description of the embodiments:
as shown in attached figures 1-3, the invention relates to a dust-fall heating system of a cement kiln waste heat boiler, which comprises a cement kiln system 1 and a waste heat boiler 2, wherein a high-temperature section air intake of the cement kiln system 1 is communicated with a high-temperature flue gas inlet 4 of a high-temperature ultra-low speed cyclone dust-fall superheater 3, a high-temperature flue gas outlet 23 of the high-temperature ultra-low speed cyclone dust-fall superheater 3 is communicated with the waste heat boiler 2, a medium-temperature section air intake of the cement kiln system 1 is communicated with a medium-temperature flue gas inlet 6 of a medium-temperature ultra-low speed cyclone dust-fall superheater 5, a medium-temperature flue gas outlet 7 of the medium-temperature ultra-low speed cyclone dust-fall superheater 5 is communicated with the waste heat boiler 2, the waste heat boiler 2 is communicated with a saturated steam inlet 9 of the medium-temperature ultra-low speed cyclone dust-fall superheater 5 through a saturated steam pipeline 8, and a superheated steam outlet II 12 is also arranged on the high-temperature ultra-low-speed cyclone dust-settling superheater 3. Above-mentioned structure, in the dust fall processing procedure, the high temperature flue gas is got the wind gap by the high temperature section of cement kiln system and is led to high temperature ultralow speed whirlwind dust fall over heater 3 by the flue gas pipeline, and the dusty flue gas carries out whirlwind through high temperature ultralow speed whirlwind dust fall over heater 3 to the high temperature flue gas and filters dust fall, the cooling, and then the flue gas gets into kiln head exhaust-heat boiler (AQC exhaust-heat boiler), heats by heating medium. The medium temperature flue gas is led to a medium temperature ultra-low speed cyclone dust-falling superheater 5 from a medium temperature section air intake port of the cement kiln system 1 through a flue gas pipeline, the dust-containing flue gas is subjected to cyclone filtration dust-falling and temperature reduction on the medium temperature flue gas through the medium temperature ultra-low speed cyclone dust-falling superheater 5, and then the flue gas enters a kiln head AQC waste heat boiler to heat a heated medium. And a heated medium in the waste heat boiler is heated through flue gas heat exchange and then heated to be full through the AQC boiler, then a saturated steam and steam-water mixture enters the medium-temperature ultra-low-speed cyclone dust-settling superheater, the saturated steam is heated through the medium-temperature ultra-low-speed cyclone dust-settling superheater to form superheated steam, the superheated steam enters the high-temperature ultra-low-speed cyclone superheater to be further heated, the parameter of the superheated steam is improved, and then the superheated steam is discharged. According to the dust-falling heating system of the cement kiln waste heat boiler, the dust collector is combined with the heating surface, so that dust can be removed from smoke, heat exchange can be carried out on the heating surface, the waste heat utilization rate of the cement waste heat boiler is improved, the heat dissipation rate of a settling chamber is reduced, and the waste heat utilization rate of the cement waste heat boiler is improved from the two aspects of equipment structure and process flow.
The high-temperature ultra-low-speed cyclone dust-falling superheater 3 is internally provided with an overheated steam pipeline, one end of the overheated steam pipeline is communicated with an overheated steam inlet, the other end of the overheated steam pipeline is communicated with an overheated steam outlet II 12, the high-temperature ultra-low-speed cyclone dust-falling superheater 3 comprises a membrane wall type superheater cylinder wall I13, and a fin tube bundle I is arranged in the superheater cylinder wall I13. Above-mentioned structure, membrane wall (over heater section of thick bamboo wall I13) and finned tube bank I are arranged to high temperature ultralow speed whirlwind dust fall over heater 3's inside, and the high temperature flue gas that contains dust gets into high temperature ultralow speed whirlwind dust fall over heater 3 and carries out the dust fall, and meanwhile, the flue gas temperature can be reduced to the heating surface of membrane wall (over heater section of thick bamboo wall I13) and finned tube bank I, and the heat loss of over heater can effectively be reduced to the structural setting of membrane wall.
A saturated steam pipeline is arranged in the medium-temperature ultra-low-speed cyclone dust-falling superheater 5, one end of the saturated steam pipeline is communicated with a saturated steam inlet 9, the other end of the saturated steam pipeline is communicated with a superheated steam outlet I10, the medium-temperature ultra-low-speed cyclone dust-falling superheater 5 comprises a membrane wall type superheater cylinder wall II 14, and a fin tube bundle II is arranged in the superheater cylinder wall II 14. According to the structure, the membrane wall (the superheater tube wall II 14) and the fin tube bundle II are arranged in the medium-temperature ultra-low-speed cyclone dust-falling superheater 5, dust-containing high-temperature flue gas enters the medium-temperature ultra-low-speed cyclone dust-falling superheater 5 for dust falling, meanwhile, the temperature of the flue gas can be reduced by the heating surfaces of the membrane wall (the superheater tube wall II 14) and the fin tube bundle II, and the heat dissipation loss of the superheater can be effectively reduced by the structural arrangement of the membrane wall.
And the lower end of the high-temperature ultra-low-speed cyclone dust-settling superheater 3 is provided with an ash hopper I15. And an ash hopper II 16 is arranged at the lower end of the medium-temperature ultra-low-speed cyclone dust-settling superheater 5. The lower end of an ash bucket I15 of the cement kiln waste heat boiler dust fall heating system is provided with an ash discharge valve I, and the lower end of an ash bucket II 16 is provided with an ash discharge valve II. With the structure, the dust falling into the dust hopper I15 is discharged through the dust discharging valve and then is sent out in a centralized manner by using the dust conveying facility. And the dust falling into the dust hopper II 16 is discharged through the dust discharging valve and then is conveyed out in a centralized manner by using a dust conveying facility. Therefore, dust collection and centralized delivery are conveniently and reliably realized.
The invention relates to a dust fall heating system of a cement kiln waste heat boiler, wherein the boiler belongs to a natural circulation waste heat boiler, the circulation of a heated medium (working medium) is divided into a waste heat boiler section, a medium temperature cyclone superheater section and a high temperature cyclone superheater section, the working medium of the waste heat boiler section flows into the medium temperature cyclone superheater section after being heated at a low temperature, saturated steam forms superheated steam after being heated, and then the superheated steam enters the high temperature cyclone superheater section to generate superheated steam with higher temperature.
The high-temperature section air intake port of the cement kiln system 1 is communicated with a high-temperature flue gas inlet 4 of a high-temperature ultralow-speed cyclone dust-fall superheater 3 through a flue gas pipeline I17, and the medium-temperature section air intake port of the cement kiln system 1 is communicated with a medium-temperature flue gas inlet 6 of a medium-temperature ultralow-speed cyclone dust-fall superheater 5 through a flue gas pipeline II 18. The high-temperature flue gas outlet 23 of the high-temperature ultra-low-speed cyclone dust-falling superheater 3 is communicated with the waste heat boiler 2 through a flue gas pipeline III 19, the middle-temperature section air intake position of the cement kiln system 1 is communicated with the middle-temperature flue gas inlet 6 of the middle-temperature ultra-low-speed cyclone dust-falling superheater 5 through a flue gas pipeline IV 20, and the middle-temperature flue gas outlet 7 of the middle-temperature ultra-low-speed cyclone dust-falling superheater 5 is communicated with the waste heat boiler 2 through a flue gas pipeline V21. Above-mentioned structure through the setting of a plurality of flue gas pipelines, realizes the intercommunication of each part of system, accomplishes flue gas and medium and carries.
The medium-temperature ultra-low-speed cyclone dust-settling superheater 5 is of a structure capable of mixing and heating saturated steam and steam water input by the waste heat boiler 2 to superheated steam, and the high-temperature ultra-low-speed cyclone dust-settling superheater 3 is of a structure capable of further heating the superheated steam input by the medium-temperature ultra-low-speed cyclone dust-settling superheater 5 to improve the temperature of the superheated steam. A heating medium pipeline is arranged in the waste heat boiler 2, and a heating medium pipeline outlet 22 of the heating medium pipeline is communicated with a saturated steam inlet 9 of the medium-temperature ultra-low-speed cyclone dust-settling superheater 5 through a saturated steam pipeline 8.
In the dust fall heating system of the cement kiln waste heat boiler, high-temperature flue gas is led to a high-temperature ultra-low-speed cyclone dust fall superheater from a high-temperature section air intake port of the cement kiln system through a flue gas pipeline in the dust fall treatment process, and dust-containing flue gas is subjected to cyclone filtration, dust fall and temperature reduction through the high-temperature ultra-low-speed cyclone dust fall superheater and enters a kiln head waste heat boiler (AQC waste heat boiler). The medium-temperature flue gas is led to a medium-temperature ultra-low speed cyclone dust-settling superheater from a medium-temperature section air intake of the cement kiln system through a flue gas pipeline, and the dust-containing flue gas is subjected to cyclone filtration dust-settling and cooling through the medium-temperature ultra-low speed cyclone dust-settling superheater and then enters a kiln head AQC waste heat boiler. Heating a heated medium in a waste heat boiler to be full through an AQC boiler, then enabling a mixture of saturated steam and steam to enter a medium-temperature ultra-low-speed cyclone dust-settling superheater, heating the saturated steam through the medium-temperature ultra-low-speed cyclone dust-settling superheater to form superheated steam, enabling the superheated steam to enter a high-temperature ultra-low-speed cyclone superheater for further heating, improving parameters of the superheated steam, and then discharging the superheated steam. According to the dust-settling heating system of the cement kiln waste heat boiler, the dust collector is combined with the heating surface, so that dust can be removed from smoke, heat exchange can be carried out on the heating surface, the waste heat utilization rate of the cement waste heat boiler is improved, the heat dissipation rate of a settling chamber is reduced, and the waste heat utilization rate of the cement waste heat boiler is improved from two aspects of equipment structure and process flow.
The present invention has been described in connection with the accompanying drawings, and it is to be understood that the invention is not limited to the specific embodiments disclosed, but is intended to cover various modifications, changes and equivalents of the embodiments of the invention, and its application to other applications without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a cement kiln exhaust-heat boiler dust fall heating system which characterized in that: the device comprises a cement kiln system (1) and a waste heat boiler (2), wherein a high-temperature section air intake opening of the cement kiln system (1) is communicated with a high-temperature flue gas inlet (4) of a high-temperature ultra-low speed cyclone dust-fall superheater (3), a high-temperature flue gas outlet (23) of the high-temperature ultra-low speed cyclone dust-fall superheater (3) is communicated with the waste heat boiler (2), a medium-temperature section air intake opening of the cement kiln system (1) is communicated with a medium-temperature flue gas inlet (6) of the medium-temperature ultra-low speed cyclone dust-fall superheater (5), a medium-temperature flue gas outlet (7) of the medium-temperature ultra-low speed cyclone dust-fall superheater (5) is communicated with the waste heat boiler (2), the waste heat boiler (2) is communicated with a saturated steam inlet (9) of the medium-temperature ultra-low speed cyclone dust-fall superheater (5) through a saturated steam pipeline (8), a superheated steam outlet I (10) of the medium-temperature ultra-low speed cyclone dust-fall superheater (5) is communicated with a superheated steam inlet (11) of the high-temperature ultra-low speed cyclone dust-fall superheater (3), and a superheated steam outlet II (12) is also arranged on the high-temperature ultra-low-speed cyclone dust-settling superheater (3).
2. The cement kiln waste heat boiler dust fall heating system according to claim 1, characterized in that: the high-temperature ultra-low-speed cyclone dust-falling superheater is characterized in that an overheated steam pipeline is arranged in the high-temperature ultra-low-speed cyclone dust-falling superheater (3), one end of the overheated steam pipeline is communicated with an overheated steam inlet, the other end of the overheated steam pipeline is communicated with an overheated steam outlet II (12), the high-temperature ultra-low-speed cyclone dust-falling superheater (3) comprises a membrane wall type superheater cylinder wall I (13), and a finned tube bundle I is arranged in the superheater cylinder wall I (13).
3. The cement kiln waste heat boiler dust fall heating system according to claim 1 or 2, characterized in that: a saturated steam pipeline is arranged in the medium-temperature ultra-low-speed cyclone dust-falling superheater (5), one end of the saturated steam pipeline is communicated with a saturated steam inlet (9), the other end of the saturated steam pipeline is communicated with a superheated steam outlet I (10), the medium-temperature ultra-low-speed cyclone dust-falling superheater (5) comprises a membrane wall type superheater cylinder wall II (14), and a fin tube bundle II is arranged in the superheater cylinder wall II (14).
4. The cement kiln waste heat boiler dust fall heating system according to claim 1, characterized in that: the lower end of the high-temperature ultra-low-speed cyclone dust-settling superheater (3) is provided with an ash hopper I (15).
5. The cement kiln waste heat boiler dust fall heating system according to claim 4, characterized in that: an ash bucket II (16) is arranged at the lower end of the medium-temperature ultra-low-speed cyclone dust-settling superheater (5).
6. The cement kiln waste heat boiler dust fall heating system according to claim 1 or 2, characterized in that: the high-temperature-section air intake port of the cement kiln system (1) is communicated with a high-temperature flue gas inlet (4) of the high-temperature ultralow-speed cyclone dust-falling superheater (3) through a flue gas pipeline I (17), and the medium-temperature-section air intake port of the cement kiln system (1) is communicated with a medium-temperature flue gas inlet (6) of the medium-temperature ultralow-speed cyclone dust-falling superheater (5) through a flue gas pipeline II (18).
7. The cement kiln waste heat boiler dust fall heating system according to claim 1 or 2, characterized in that: a high-temperature flue gas outlet (23) of the high-temperature ultra-low-speed cyclone dust-settling superheater (3) is communicated with the waste heat boiler (2) through a flue gas pipeline III (19), a middle-temperature section air intake of the cement kiln system (1) is communicated with a middle-temperature flue gas inlet (6) of the middle-temperature ultra-low-speed cyclone dust-settling superheater (5) through a flue gas pipeline IV (20), and a middle-temperature flue gas outlet (7) of the middle-temperature ultra-low-speed cyclone dust-settling superheater (5) is communicated with the waste heat boiler (2) through a flue gas pipeline V (21).
8. The cement kiln waste heat boiler dust fall heating system according to claim 1 or 2, characterized in that: the medium-temperature ultra-low-speed cyclone dust-settling superheater (5) is of a structure capable of heating saturated steam and steam-water mixed input by the waste heat boiler (2) to superheated steam, and the high-temperature ultra-low-speed cyclone dust-settling superheater (3) is of a structure capable of further heating the superheated steam input by the medium-temperature ultra-low-speed cyclone dust-settling superheater (5) to improve the temperature of the superheated steam.
9. The cement kiln waste heat boiler dust fall heating system according to claim 8, characterized in that: a heating medium pipeline is arranged in the waste heat boiler (2), and a heating medium pipeline outlet (22) of the heating medium pipeline is communicated with a saturated steam inlet (9) of the medium-temperature ultra-low-speed cyclone dust-settling superheater (5) through a saturated steam pipeline (8).
10. The cement kiln waste heat boiler dust fall heating system according to claim 5, characterized in that: the lower end of an ash bucket I (15) of the cement kiln waste heat boiler dust-falling heating system is provided with an ash discharge valve I, and the lower end of an ash bucket II (16) is provided with an ash discharge valve II.
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| CN101793467A (en) * | 2010-02-10 | 2010-08-04 | 洛阳水泥工程设计研究院有限公司 | Pure medium-low temperature waste heat generating system in cement kiln |
| CN101871732A (en) * | 2010-06-30 | 2010-10-27 | 成都四通科技投资有限公司 | Single-pressure recovery generating system of waste heat of dry method cement production line |
| CN202692721U (en) * | 2012-05-18 | 2013-01-23 | 大连易世达新能源发展股份有限公司 | Integrated kiln head waste heat boiler for cement kiln |
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| CN111765775A (en) * | 2020-07-06 | 2020-10-13 | 成都建筑材料工业设计研究院有限公司 | Adjustable step waste heat recovery system of cement kiln head |
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2021
- 2021-06-10 CN CN202110646555.3A patent/CN113237353A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101793467A (en) * | 2010-02-10 | 2010-08-04 | 洛阳水泥工程设计研究院有限公司 | Pure medium-low temperature waste heat generating system in cement kiln |
| CN101871732A (en) * | 2010-06-30 | 2010-10-27 | 成都四通科技投资有限公司 | Single-pressure recovery generating system of waste heat of dry method cement production line |
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Application publication date: 20210810 |