CN215002973U - Cement kiln waste heat utilization system - Google Patents
Cement kiln waste heat utilization system Download PDFInfo
- Publication number
- CN215002973U CN215002973U CN202120905458.7U CN202120905458U CN215002973U CN 215002973 U CN215002973 U CN 215002973U CN 202120905458 U CN202120905458 U CN 202120905458U CN 215002973 U CN215002973 U CN 215002973U
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- heat
- cement kiln
- waste gas
- evaporator
- pipeline
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- 239000004568 cement Substances 0.000 title claims abstract description 43
- 239000002918 waste heat Substances 0.000 title claims abstract description 31
- 239000002912 waste gas Substances 0.000 claims abstract description 38
- 238000010248 power generation Methods 0.000 claims abstract description 19
- 239000000428 dust Substances 0.000 claims description 10
- 238000011084 recovery Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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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
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model discloses a cement kiln waste heat utilization system, this cement kiln waste heat utilization system includes: the system comprises a heat exchanger, an evaporator, a turbine power generation device, a throttle valve, a pump and a compressor; the heat receiving pipeline of the heat exchanger, the turbine power generation device, the throttle valve, the heat receiving pipeline of the evaporator, the pump and the compressor are connected through a first connecting pipe to form a circulating loop, and CO is arranged in the circulating loop2Working medium; the cement kiln waste gas discharge port, the heat transfer pipeline of the heat exchanger and the heat transfer pipeline of the evaporator are connected through a second connecting pipe to form a waste gas channel, and waste gas discharged by the cement kiln is filled in the waste gas channel. The waste heat utilization system of the cement kiln is used for trans-critical CO2The combined cooling and power supply device is applied to a cement clinker production line and can fully benefitAnd performing waste heat power generation by using the kiln head, the kiln tail and other parts generating waste gas.
Description
Technical Field
The utility model relates to a cement industry field specifically relates to a cement kiln waste heat utilization system.
Background
For a new dry method cement kiln, the kiln tail waste gas amount is large, the temperature is high, the waste gas temperature is generally about 310 ℃, the waste heat accounts for 15-18% of the total heat expenditure of a firing system, the kiln head waste gas also has the characteristics of large waste gas amount and high temperature, and the waste gas waste heat is fully utilized in order to avoid the waste of a large amount of heat at the kiln head and the kiln tail of a cement clinker production line and other parts generating the waste gas and the occurrence of high-temperature damage conditions of subsequent dust collectors and other equipment.
Transcritical CO2A combined cooling and power supply device which utilizes CO2The low critical temperature (31.1 ℃) and the high critical pressure (7.37MPa) ensure that the refrigerant CO of the circulating system2And the device works in a subcritical region and a supercritical region. The cold produced by the evaporation section of the system and the heat produced by the condensation section are comprehensively utilized, and the combined supply of cold and heat or cold and electricity is realized, so that the optimal economic benefit is obtained.
Therefore, how to cross critical CO2The cold-electricity combined device is applied to a waste gas treatment system of a cement clinker production line, and plays a role in heat recovery, power generation and utilization and avoiding high-temperature damage of subsequent equipment, thereby solving the technical problem.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a cement kiln waste heat utilization system, this cement kiln waste heat utilization system will stride critical CO2The combined cooling and power supply device is applied to a cement clinker production line, and can fully utilize the kiln head, the kiln tail and other parts generating waste gas to carry out waste heat power generation.
In order to achieve the above object, the present inventionThe utility model provides a cement kiln waste heat utilization system, this cement kiln waste heat utilization system includes: the system comprises a heat exchanger, an evaporator, a turbine power generation device, a throttle valve, a pump and a compressor; the heat receiving pipeline of the heat exchanger, the turbine power generation device, the throttle valve, the heat receiving pipeline of the evaporator, the pump and the compressor are connected through a first connecting pipe to form a circulating loop, and CO is arranged in the circulating loop2Working medium; the cement kiln waste gas discharge port, the heat transfer pipeline of the heat exchanger and the heat transfer pipeline of the evaporator are connected through a second connecting pipe to form a waste gas channel, and waste gas discharged by the cement kiln is filled in the waste gas channel.
Preferably, the cement kiln waste heat utilization system further comprises: and two ends of a heated pipeline of the heat regenerator are respectively connected with the compressor and the heated pipeline of the heat exchanger, and two ends of a heat transmission pipeline of the heat regenerator are respectively connected with the throttle valve and the heated pipeline of the evaporator.
Preferably, the outlet end of the heat transfer pipeline of the evaporator is further connected with a dust collector and a tail exhaust fan in sequence through a third connecting pipe.
According to the technical scheme, the utility model provides a cement kiln waste heat utilization system will stride critical CO2The combined cooling and power supply device is applied to a cement clinker production line, and can fully utilize the kiln head, the kiln tail and other parts generating waste gas to carry out waste heat power generation.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a preferred embodiment of a cement kiln waste heat utilization system.
Description of the reference numerals
1 Heat exchanger 2 evaporator
3 turbine power generation device 4 throttle valve
5 heat regenerator 6 dust collector
7 tail exhaust fan 8 pump
9 compressor 10 first connecting pipe
11 second connecting pipe 12 third connecting pipe
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
In the present invention, unless otherwise specified, the terms "upper, lower, top, bottom, far, near, side" and the like included in the terms "an orientation" merely represent an orientation of the terms in a conventional use state or a colloquial meaning understood by those skilled in the art, and should not be construed as limiting the terms.
Referring to fig. 1, the cement kiln waste heat utilization system includes: the system comprises a heat exchanger 1, an evaporator 2, a turbine generating set 3, a throttle valve 4, a pump 8 and a compressor 9; the heat receiving pipeline of the heat exchanger 1, the turbine power generation device 3, the throttle valve 4, the heat receiving pipeline of the evaporator 2, the pump 8 and the compressor 9 are connected through a first connecting pipe 10 to form a circulation loop, and CO is arranged in the circulation loop2Working medium; the cement kiln waste gas discharge port, the heat transfer pipeline of the heat exchanger 1 and the heat transfer pipeline of the evaporator 2 are connected through a second connecting pipe 11 to form a waste gas channel, and waste gas discharged by the cement kiln is filled in the waste gas channel.
Through the implementation of the technical scheme, the waste heat utilization system of the cement kiln can be used for trans-critical CO2The combined cooling and power supply device is applied to a cement clinker production line, and can fully utilize the kiln head, the kiln tail and other parts generating waste gas to carry out waste heat power generation.
In this embodiment, preferably, the cement kiln waste heat utilization system further includes: the heat recovery system comprises a heat regenerator 5, wherein two ends of a heated pipeline of the heat regenerator 5 are respectively connected with a compressor 9 and the heated pipeline of the heat exchanger 1, and two ends of a heat transfer pipeline of the heat regenerator 5 are respectively connected withIs connected with the throttle valve 4 and the heated pipeline of the evaporator 2. The heat regenerator 5 is arranged, so that the CO after secondary pressurization2Working medium and CO discharged from turbine power generation unit 32The working medium exchanges heat and the CO discharged from the turbine power generation device 32The temperature of the working medium is reduced, thereby increasing the CO entering the evaporator 22And (4) secondary heat exchange efficiency of the working medium.
In this embodiment, preferably, the outlet end of the heat transfer pipeline of the evaporator 2 is further connected with a dust collector 6 and an exhaust fan 7 in sequence through a third connecting pipe 12. The tail exhaust fan 7 is used for discharging cooled exhaust gas, and meanwhile, a dust collector 6 is used for collecting solid dust and the like. The temperature of the waste gas is reduced before the waste gas enters the dust collector 6, so that the service lives of the dust collector 6 and the tail exhaust fan 7 can be prolonged.
The utility model provides a cement kiln waste heat utilization system will stride critical CO2The combined cooling and power supply device is applied to a cement clinker production line, and is used for carrying out heat exchange and cooling treatment on waste gas discharged by a cement kiln before the waste gas is discharged, and recovering waste heat for power generation. High-temperature waste gas generated by the cement kiln transfers heat to CO through heat exchange of the heat exchanger 12Working medium, CO in high-temperature and high-pressure state after heat exchange2The working medium drives the turbine power generation device 3 to generate power by expansion work, and CO discharged from the turbine power generation device 32Enters the evaporator 2 through the throttle valve 4 to perform secondary heat exchange with the waste gas passing through the heat exchanger 1, and CO is obtained2The working medium evaporates and absorbs the waste heat of the waste gas, and simultaneously, the purpose of fully reducing the temperature of the waste gas is achieved, and the refrigeration effect is achieved. CO discharged from the evaporator 22The working medium is pressurized by the pump 8, secondarily pressurized by the compressor 9, and finally enters the heat regenerator 5 and CO discharged from the turbine power generation device 32The working medium is subjected to heat exchange, in the process, heat is discharged from CO of the turbine device2Working medium is transmitted to cold CO after pressurization2Working medium, lifting CO entering the evaporator 22The secondary heat exchange efficiency of the working medium makes full use of waste heat, and reduces the temperature of waste gas entering the dust collector 6 and other subsequent equipment so as to prolong the service life of the corresponding equipment.
The utility model provides a cement kiln waste heat utilization system should advance according to the actual space condition of cement plantReasonably arranged, jointly utilizes multi-part waste gas as much as possible, improves the utilization efficiency, saves the investment, and introduces transcritical CO2The utility model discloses the connecting tube of cold electricity confession device will avoid sharp turn, and it is too big to bring the pressure loss apart from overlength etc. problem that calorific loss and system's power consumption increase, the utility model discloses well position that utilizes the cement kiln to produce waste gas if: behind the kiln head waste heat pipeline of the cement kiln and behind the Cl collecting pipeline at the kiln tail.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features.
In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.
Claims (3)
1. The cement kiln waste heat utilization system is characterized by comprising: the system comprises a heat exchanger (1), an evaporator (2), a turbine power generation device (3), a throttle valve (4), a pump (8) and a compressor (9); wherein,
the heat receiving pipeline of the heat exchanger (1), the turbine power generation device (3), the throttle valve (4), the heat receiving pipeline of the evaporator (2), the pump (8) and the compressor (9) are connected through a first connecting pipe (10) to form a circulating loop, and CO is arranged in the circulating loop2Working medium;
the cement kiln waste gas discharge port, the heat transfer pipeline of the heat exchanger (1) and the heat transfer pipeline of the evaporator (2) are connected through a second connecting pipe (11) to form a waste gas channel, and waste gas discharged by the cement kiln is filled in the waste gas channel.
2. The cement kiln waste heat utilization system according to claim 1, further comprising: the heat recovery system comprises a heat regenerator (5), wherein two ends of a heated pipeline of the heat regenerator (5) are respectively connected with a compressor (9) and the heated pipeline of the heat exchanger (1), and two ends of a heat transmission pipeline of the heat regenerator (5) are respectively connected with a throttle valve (4) and the heated pipeline of an evaporator (2).
3. The cement kiln waste heat utilization system according to claim 1 or 2, characterized in that the outlet end of the heat transfer pipeline of the evaporator (2) is further connected with a dust collector (6) and a tail exhaust fan (7) in sequence through a third connecting pipe (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120905458.7U CN215002973U (en) | 2021-04-28 | 2021-04-28 | Cement kiln waste heat utilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120905458.7U CN215002973U (en) | 2021-04-28 | 2021-04-28 | Cement kiln waste heat utilization system |
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| Publication Number | Publication Date |
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| CN215002973U true CN215002973U (en) | 2021-12-03 |
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| CN202120905458.7U Active CN215002973U (en) | 2021-04-28 | 2021-04-28 | Cement kiln waste heat utilization system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114440575A (en) * | 2022-03-25 | 2022-05-06 | 安徽海螺建材设计研究院有限责任公司 | Household garbage drying system utilizing cement kiln waste gas |
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2021
- 2021-04-28 CN CN202120905458.7U patent/CN215002973U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114440575A (en) * | 2022-03-25 | 2022-05-06 | 安徽海螺建材设计研究院有限责任公司 | Household garbage drying system utilizing cement kiln waste gas |
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