CN215112700U - System for recovering chimney exhaust heat to improve power generation efficiency of waste incineration plant - Google Patents
System for recovering chimney exhaust heat to improve power generation efficiency of waste incineration plant Download PDFInfo
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- CN215112700U CN215112700U CN202120130284.1U CN202120130284U CN215112700U CN 215112700 U CN215112700 U CN 215112700U CN 202120130284 U CN202120130284 U CN 202120130284U CN 215112700 U CN215112700 U CN 215112700U
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- heat exchanger
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The utility model relates to a system for it improves waste incineration plant generating efficiency to retrieve chimney exhaust heat belongs to city domestic waste incineration technical field. Comprises heating a condensate system; the heating condensed water system comprises a smoke exhaust draught fan, a gas-water heat exchanger, a condensed water heater, a heat transfer medium pipeline and a chimney; and a gas-water heat exchanger is arranged between the smoke exhaust draught fan and the chimney, and the gas-water heat exchanger is connected with the condensed water heater through a heat transfer medium pipeline. The utility model improves the power generation efficiency of the waste incineration plant by recovering the waste heat of the exhaust smoke of the chimney to heat the condensed water; the method is suitable for technical improvement of newly-built projects and operated projects, accords with national energy-saving and emission-reduction policies, and is also an important means for increasing income and improving market competitiveness of waste incineration power plants.
Description
Technical Field
The utility model relates to a system for it improves waste incineration plant generating efficiency to retrieve chimney exhaust heat belongs to city domestic waste incineration technical field.
Background
The urban domestic garbage incineration power generation has the advantages of reduction, harmlessness, recycling and the like, and becomes the main treatment mode of the urban domestic garbage at present. Because the tail part of the waste incineration power plant is matched with the deacidification and denitration device, the smoke temperature is required, the smoke discharging temperature of a chimney is about 140 ℃, and huge smoke discharging heat loss is caused. The municipal solid waste contains a large amount of sulfur, chlorine elements, sodium, potassium and other alkali metals, and in order to prevent high-temperature corrosion and pipe explosion of the waste incineration boiler, steam parameters mainly comprise medium-temperature medium pressure or medium-temperature secondary high pressure; at present, the efficiency of garbage power generation is about 20% -30%, which is far lower than that of a conventional coal-fired gas generator set. Therefore, the deep recovery of the chimney exhaust waste heat improves the power generation efficiency, not only accords with the national energy-saving and emission-reduction policy, but also is an important technical way for increasing the income of the waste incineration power plant and improving the market competitiveness.
Disclosure of Invention
The utility model aims at solving the technical problem of how to recover the chimney and discharge smoke waste heat to improve the generating efficiency.
In order to solve the above problems, the technical solution adopted by the present invention is to provide a system for recovering the waste heat of the chimney exhaust to improve the power generation efficiency of the waste incineration plant; comprises heating a condensate system; the heating condensed water system comprises a smoke exhaust draught fan, a gas-water heat exchanger, a condensed water heater, a heat transfer medium pipeline and a chimney; and a gas-water heat exchanger is arranged between the smoke exhaust draught fan and the chimney, and the gas-water heat exchanger is connected with the condensed water heater through a heat transfer medium pipeline.
Preferably, the gas-water heat exchanger is provided with a first water outlet and a first water inlet; the condensed water heater is provided with a water inlet II and a water outlet II; a circulating pump and a circulating water tank are arranged between the gas-water heat exchanger and the condensed water heater.
Preferably, a first water outlet arranged on the gas-water heat exchanger is connected with a second water inlet arranged on the condensed water heater.
Preferably, a water outlet II arranged on the condensed water heater is connected with a water inlet I arranged on the gas-water heat exchanger sequentially through a circulating water tank and a circulating pump.
Preferably, a bypass flue adjusting door is arranged between the smoke exhaust induced draft fan and the chimney, and the bypass flue adjusting door is connected with the gas-water heat exchanger in parallel.
Preferably, a heat transfer medium is provided in the heat transfer medium conduit.
Preferably, the heat transfer medium is provided as demineralized water.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model provides a system and an operation process for improving the power generation efficiency of a waste incineration plant, which mainly use the waste heat of the discharged smoke of a deep recovery chimney for heating condensed water so as to improve the power generation efficiency of the waste incineration plant; the method is suitable for technical improvement of newly-built projects and operated projects, accords with national energy-saving and emission-reduction policies, and is also an important means for increasing income and improving market competitiveness of waste incineration power plants.
The utility model discloses mainly solve the problem that waste incineration generating efficiency is low and chimney exhaust gas calorific loss is big, accord with national energy saving and emission reduction policy. The bypass adjustable flue is adopted, and the smoke exhaust temperature of the chimney can be flexibly set and adjusted. The demineralized water is used as a heat transfer medium, and the system is simple and safe and has low energy consumption in operation. The utility model discloses do not have the influence and can switch in a flexible way to conventional backheat system, can use in the technological improvement of the new-built project of each producer or operation project.
Drawings
Fig. 1 is a schematic structural view of the present invention;
reference numerals: 1. a smoke exhaust draught fan; 2. a gas-water heat exchanger; 3. a circulation pump; 4. a circulating water tank; 5. a condensed water heater; 6. a bypass flue damper; 7. a turbo generator unit; 8. a condenser; 9. a condensate pump; 10. a shaft seal heater; 11. a low pressure heater; 12. a deaerator and a water tank; 13. a feed pump; 14. a waste incineration waste heat boiler; 15. and (4) a chimney.
Detailed Description
In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings:
as shown in fig. 1, the utility model provides a system for recovering the waste heat of the exhaust smoke of the chimney and improving the power generation efficiency of the waste incineration plant; comprises heating a condensate system; the heating condensed water system comprises a smoke exhaust draught fan 1, a gas-water heat exchanger 2, a condensed water heater 5, a heat transfer medium pipeline and a chimney 15; a gas-water heat exchanger 2 is arranged between the smoke exhaust induced draft fan 1 and the chimney 15, and the gas-water heat exchanger 2 is connected with the condensed water heater 5 through a heat transfer medium pipeline. The gas-water heat exchanger 2 is provided with a first water outlet and a first water inlet; the condensed water heater 5 is provided with a water inlet II and a water outlet II; a circulating pump 3 and a circulating water tank 4 are arranged between the gas-water heat exchanger 2 and the condensed water heater 5. The first water outlet arranged on the gas-water heat exchanger 2 is connected with the second water inlet arranged on the condensed water heater 5. A water outlet II arranged on the condensed water heater 5 is connected with a water inlet I arranged on the gas-water heat exchanger 2 sequentially through the circulating water tank 4 and the circulating pump 3. A bypass flue adjusting door 6 is arranged between the smoke exhaust induced draft fan 1 and the chimney 15, and the bypass flue adjusting door 6 is connected with the gas-water heat exchanger 2 in parallel. The heat transfer medium pipeline is internally provided with a heat transfer medium. The heat transfer medium is set to be demineralized water.
Examples
The example takes a garbage incineration plant with the conventional steam parameters of 4.0MPa and 400 ℃ and the chimney exhaust temperature of 140 ℃ as an example: in the figure 1, a gas-water heat exchanger 2 for recovering waste heat of exhaust smoke is arranged on a flue between an exhaust smoke induced draft fan 1 and a chimney 15, and the temperature of the exhaust smoke in a shell pass is reduced to 80-110 ℃ by desalted water in a tube pass. The bypass flue adjusting door 6 is used for adjusting the smoke exhaust temperature of the chimney and can be specifically set according to meteorological conditions and operation requirements in different seasons. The system takes demineralized water as a heat transfer medium, the circulating water tank 4 is used for buffering and storing the demineralized water, the demineralized water is pressurized and conveyed to the tube side of the gas-water heat exchanger 2 through the circulating pump 3, the demineralized water is heated by flue gas and then conveyed to the condensed water heater 5, and the demineralized water exchanges heat with condensed water from the condenser 8 and is cooled and then returns to the circulating water tank 4 to complete primary circulation. The temperature of the desalted water heated by the gas-water heat exchanger 2 is about 120-.
After a chimney smoke exhaust waste heat recovery system is added, the thermodynamic system of the waste incineration power plant is as follows: the feed water is pressurized and conveyed to the waste incineration waste heat boiler 14 through the feed water pump 13, the feed water completes the heating, vaporization and overheating processes in the waste incineration waste heat boiler 14, and superheated steam with rated parameters is generated; the superheated steam expands in the turbo generator unit 7 to do work, and then exhaust steam is condensed in a condenser 8; the condensed water after condensation is pressurized by a condensate pump 9 and then sequentially passes through a shaft seal heater 10, a condensate heater 5 and a low-pressure heater 11 and then enters a deaerator and a water tank 12, so that the whole thermodynamic cycle is completed.
The foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the present invention in any way and in any way, and it should be understood that modifications and additions may be made by those skilled in the art without departing from the scope of the present invention. Those skilled in the art can make various changes, modifications and evolutions equivalent to those made by the above-disclosed technical content without departing from the spirit and scope of the present invention, and all such changes, modifications and evolutions are equivalent embodiments of the present invention; meanwhile, any changes, modifications and evolutions of equivalent changes to the above embodiments according to the actual technology of the present invention are also within the scope of the technical solution of the present invention.
Claims (7)
1. The utility model provides a system for it improves waste incineration plant generating efficiency to retrieve chimney exhaust heat which characterized in that: comprises heating a condensate system; the heating condensed water system comprises a smoke exhaust draught fan, a gas-water heat exchanger, a condensed water heater, a heat transfer medium pipeline and a chimney; and a gas-water heat exchanger is arranged between the smoke exhaust draught fan and the chimney, and the gas-water heat exchanger is connected with the condensed water heater through a heat transfer medium pipeline.
2. The system for recovering the waste heat of the exhaust smoke of the chimney to improve the power generation efficiency of the waste incineration plant according to claim 1, characterized in that: the gas-water heat exchanger is provided with a first water outlet and a first water inlet; the condensed water heater is provided with a water inlet II and a water outlet II; a circulating pump and a circulating water tank are arranged between the gas-water heat exchanger and the condensed water heater.
3. The system for recovering the waste heat of the exhaust smoke of the chimney to improve the power generation efficiency of the waste incineration plant according to claim 2, characterized in that: and a first water outlet arranged on the gas-water heat exchanger is connected with a second water inlet arranged on the condensed water heater.
4. The system for recovering the waste heat of the exhaust smoke of the chimney to improve the power generation efficiency of the waste incineration plant according to claim 3, characterized in that: and a water outlet II arranged on the condensed water heater is connected with a water inlet I arranged on the gas-water heat exchanger sequentially through the circulating water tank and the circulating pump.
5. The system for recovering the waste heat of the exhaust smoke of the chimney to improve the power generation efficiency of the waste incineration plant according to claim 4, characterized in that: and a bypass flue adjusting door is arranged between the smoke exhaust draught fan and the chimney, and is connected with the gas-water heat exchanger in parallel.
6. The system for recovering the waste heat of the exhaust smoke of the chimney to improve the power generation efficiency of the waste incineration plant according to claim 5, wherein: and a heat transfer medium is arranged in the heat transfer medium pipeline.
7. The system for recovering the waste heat of the exhaust smoke of the chimney to improve the power generation efficiency of the waste incineration plant as claimed in claim 6, wherein: the heat transfer medium is set to be demineralized water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120130284.1U CN215112700U (en) | 2021-01-18 | 2021-01-18 | System for recovering chimney exhaust heat to improve power generation efficiency of waste incineration plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120130284.1U CN215112700U (en) | 2021-01-18 | 2021-01-18 | System for recovering chimney exhaust heat to improve power generation efficiency of waste incineration plant |
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| Publication Number | Publication Date |
|---|---|
| CN215112700U true CN215112700U (en) | 2021-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120130284.1U Active CN215112700U (en) | 2021-01-18 | 2021-01-18 | System for recovering chimney exhaust heat to improve power generation efficiency of waste incineration plant |
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| CN (1) | CN215112700U (en) |
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2021
- 2021-01-18 CN CN202120130284.1U patent/CN215112700U/en active Active
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