CN203116054U - Cooling device used for flue gas heat exchanging - Google Patents
Cooling device used for flue gas heat exchanging Download PDFInfo
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- CN203116054U CN203116054U CN201320122603XU CN201320122603U CN203116054U CN 203116054 U CN203116054 U CN 203116054U CN 201320122603X U CN201320122603X U CN 201320122603XU CN 201320122603 U CN201320122603 U CN 201320122603U CN 203116054 U CN203116054 U CN 203116054U
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- flue gas
- heat exchanger
- temperature
- heat
- temperature flue
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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
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Abstract
The utility model discloses a cooling device used for flue gas heat exchanging. The cooling device used for flue gas heat exchanging comprises heat exchangers, a circulating pipeline and a cold source. The circulating pipeline is communicated with the heat exchangers and the cold source, the heat exchangers are arranged inside a flue between a flue gas outlet of a device which generates high-temperature flue gas and a flue gas inlet of a dust remover, the cooling device comprises a primary heat exchanger and a secondary heat exchanger which are connected in series, the primary heat exchanger is located at the flue gas inlet of the dust remover, and the secondary heat exchanger is located at the flue gas outlet of the device which generates the high-temperature flue gas. The flow direction of heat exchanging media inside the cooling device is opposite to the flow direction of the high-temperature flue gas inside the flue, the high-temperature flue gas firstly passes through the secondary heat exchanger to be cooled to be medium-high-temperature flue gas, and the medium-high-temperature flue gas is cooled to be low-temperature flue gas after passing through the primary heat exchanger and then enters the dust remover. After deep cooing is conducted on the high-temperature flue gas, specific resistance of powder dust inside the flue gas is reduced, and dust-removing efficiency of the dust remover is greatly improved.
Description
Technical field
The utility model relates to the flue gas heat exchange technical field, particularly relates to a kind of heat sink for flue gas heat exchange.
Background technology
Traditional electrostatic precipitation technology has been widely applied to the smoke and dust treatment of the equipment that produces high-temperature flue gas, for example, and the smoke and dust treatment of coal-fired fired power generating unit.Deduster is in the process of smoke and dust treatment, if it is higher to enter the flue-gas temperature of deduster, then the ratio resistance of dust is higher in the flue gas, will influence the efficiency of dust collection of deduster.
At present, a kind of typical flue gas heat exchange heat sink comprises I level heat exchanger, usually be arranged between the gas approach of the exhanst gas outlet of the equipment that produces high-temperature flue gas and deduster, this flue gas heat exchange heat sink can reduce the temperature of the flue gas that enters deduster, thereby the ratio resistance of dust in the reduction flue gas can improve the efficiency of dust collection of deduster.
But in actual use, because the difference of coal-burning boiler ature of coal is added the influence that is subjected to load fluctuation, low when high when making the temperature of the flue gas that coal-burning boiler is discharged, exhaust gas volumn is little when big also the time.When the flue-gas temperature height, when exhaust gas volumn is big, existing flue gas heat exchange heat sink can not satisfy the cooling demand of flue gas, makes that the cooling extent of flue gas is less, has influenced the efficiency of dust collection of deduster.
Therefore, how making heat sink all can satisfy the cooling demand of flue gas under different operating modes, is that those skilled in the art are badly in need of the technical problem that solves at present.
The utility model content
The purpose of this utility model provides a kind of heat sink for flue gas heat exchange, and this heat sink can satisfy the cooling demand of flue gas under the different operating modes.
In order to realize above-mentioned technical purpose, the utility model provides a kind of heat sink for flue gas heat exchange, comprise heat exchanger, circulation line and low-temperature receiver, described circulation line is communicated with described heat exchanger and described low-temperature receiver, described heat exchanger is arranged in the flue between the gas approach of the exhanst gas outlet of the equipment that produces high-temperature flue gas and deduster, described heat sink comprises I level heat exchanger and the II level heat exchanger of series connection, described I level heat exchanger is positioned at the gas approach of described deduster, and described II level heat exchanger is positioned at the exhanst gas outlet of the equipment of described generation high-temperature flue gas.
Preferably, the heat transferring medium of described heat sink is the steam turbine condensed water, and described circulation line connects steam turbine low pressure heating system.
Preferably, the equipment of described generation high-temperature flue gas is coal-fired fired power generating unit.
The heat sink that is used for flue gas heat exchange that the utility model provides, comprise heat exchanger, circulation line and low-temperature receiver, circulation line is communicated with heat exchanger and low-temperature receiver, heat exchanger is arranged in the flue between the gas approach of the exhanst gas outlet of the equipment that produces high-temperature flue gas and deduster, heat sink comprises I level heat exchanger and the II level heat exchanger of series connection, I level heat exchanger is positioned at the gas approach of deduster, and II level heat exchanger is positioned at the exhanst gas outlet of the equipment that produces high-temperature flue gas.
This heat sink comprises I level heat exchanger and II level heat exchanger, and the flow direction of heat transferring medium is opposite with the flow direction of high-temperature flue gas in the flue in the heat sink.Heat transferring medium is earlier through I level heat exchanger, pass through II level heat exchanger again, high-temperature flue gas runs into II level heat exchanger at the exhanst gas outlet of equipment, temperature is declined to become middle high-temperature flue gas, become low-temperature flue gas behind the middle high-temperature flue gas process I level heat exchanger, enter deduster then, after high-temperature flue gas is lowered the temperature through the degree of depth, reduce the ratio resistance of dust in the flue gas, increased substantially the efficiency of dust collection of deduster.
Concrete, the circulation line of heat sink can be recycled the heat of flue gas, heat transferring medium can be the steam turbine condensed water, heat transferring medium after will heating by circulation line draws back-steam machine low pressure heating system, instead of part hangs down the effect that adds, can save the consumption of electric coal, when reducing flue-gas temperature, recycle the heat of flue gas.
Description of drawings
Fig. 1 is the structural representation of a kind of specific embodiment of heat sink for flue gas heat exchange provided by the utility model;
Fig. 2 is the flow direction schematic diagram of heat transferring medium in the heat sink shown in Figure 1.
Wherein, Reference numeral is as follows:
The specific embodiment
Core of the present utility model provides a kind of heat sink for flue gas heat exchange, and this heat sink can satisfy the cooling demand of flue gas under the different operating modes.
In order to make those skilled in the art person understand the utility model scheme better, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 1 and Fig. 2, Fig. 1 is the structural representation of a kind of specific embodiment of heat sink for flue gas heat exchange provided by the utility model, and Fig. 2 is the flow direction schematic diagram of heat transferring medium in the heat sink shown in Figure 1.
In a kind of concrete embodiment, the utility model provides a kind of heat sink for flue gas heat exchange, comprise heat exchanger 1, circulation line 2 and low-temperature receiver, described circulation line 2 is communicated with described heat exchanger 1 and described low-temperature receiver, described heat exchanger 1 is arranged in the flue 4 between the gas approach of the exhanst gas outlet of the equipment that produces high-temperature flue gas and deduster 3, described heat sink comprises I level heat exchanger 11 and the II level heat exchanger 12 of series connection, described I level heat exchanger 11 is positioned at the gas approach of described deduster, and described II level heat exchanger 12 is positioned at the exhanst gas outlet of the equipment of described generation high-temperature flue gas.
This heat sink comprises I level heat exchanger 11 and II level heat exchanger 12, and the flow direction of heat transferring medium is opposite with the flow direction of high-temperature flue gas in the flue 4 in the heat sink.Heat transferring medium through I level heat exchanger 11, passes through II level heat exchanger 12 earlier again.High-temperature flue gas runs into II level heat exchanger 12 at the exhanst gas outlet of equipment, temperature is declined to become middle high-temperature flue gas, become low-temperature flue gas behind the middle high-temperature flue gas process I level heat exchanger 11, enter deduster 3 then, after high-temperature flue gas is lowered the temperature through the degree of depth, reduce the ratio resistance of dust in the flue gas, increased substantially the efficiency of dust collection of deduster 3.
The heat exchanger 1 of this heat sink all is arranged in the flue 4 of high-temperature flue gas process.Working conditions change when the equipment that produces high-temperature flue gas, the exhaust gas volumn that produces is bigger, when the temperature of flue gas is higher, high-temperature flue gas is through in the process of flue 4, pass through II level heat exchanger 12 and I level heat exchanger 11 successively, the cryogenic media in high-temperature flue gas and each heat exchanger 1 carries out heat exchange, can lower the temperature fully to high-temperature flue gas, satisfy the cooling demand of flue gas under the different operating modes, help to improve the efficiency of dust collection of deduster 3.Concrete, can make heat sink be applicable to different operating modes by the reasonable Arrangement of circulation line 2.
In the another kind of concrete embodiment, the heat transferring medium of heat sink can be the steam turbine condensed water, and the heat transferring medium after will heating by circulation line 2 draws back-steam machine low pressure heating system, reclaim the heat of flue gas, low effect, the effective heat of recycling flue gas when reducing flue-gas temperature of adding of instead of part.Concrete, other can utilize the system of heat transferring medium heat also can be applied in this heat sink, for example, and heating system etc.
In the respective embodiments described above, the equipment that produces high-temperature flue gas can be coal-fired fired power generating unit, and each heat exchanger 1 can be arranged in the flue 2 between the outlet of boiler air preheater and deduster 3 imports.
More than the heat sink for flue gas heat exchange provided by the utility model is described in detail.Used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (3)
1. heat sink that is used for flue gas heat exchange, comprise heat exchanger (1), circulation line (2) and low-temperature receiver, described circulation line (2) is communicated with described heat exchanger (1) and described low-temperature receiver, described heat exchanger (1) is arranged in the flue (4) between the gas approach of the exhanst gas outlet of the equipment that produces high-temperature flue gas and deduster (3), it is characterized in that, described heat sink comprises I level heat exchanger (11) and the II level heat exchanger (12) of series connection, described I level heat exchanger (11) is positioned at the gas approach of described deduster, and described II level heat exchanger (12) is positioned at the exhanst gas outlet of the equipment of described generation high-temperature flue gas.
2. the heat sink for flue gas heat exchange as claimed in claim 1 is characterized in that, the heat transferring medium of described heat sink is the steam turbine condensed water, and described circulation line (2) connects steam turbine low pressure heating system.
3. the heat sink for flue gas heat exchange as claimed in claim 2 is characterized in that, the equipment of described generation high-temperature flue gas is coal-fired fired power generating unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320122603XU CN203116054U (en) | 2013-03-18 | 2013-03-18 | Cooling device used for flue gas heat exchanging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320122603XU CN203116054U (en) | 2013-03-18 | 2013-03-18 | Cooling device used for flue gas heat exchanging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203116054U true CN203116054U (en) | 2013-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320122603XU Expired - Fee Related CN203116054U (en) | 2013-03-18 | 2013-03-18 | Cooling device used for flue gas heat exchanging |
Country Status (1)
| Country | Link |
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| CN (1) | CN203116054U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105371292A (en) * | 2014-08-27 | 2016-03-02 | 谭美俊 | Flue gas cooling device of power station boiler |
-
2013
- 2013-03-18 CN CN201320122603XU patent/CN203116054U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105371292A (en) * | 2014-08-27 | 2016-03-02 | 谭美俊 | Flue gas cooling device of power station boiler |
| CN105371292B (en) * | 2014-08-27 | 2017-10-20 | 谭美俊 | A kind of flue gas cooling device of station boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 Termination date: 20210318 |
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| CF01 | Termination of patent right due to non-payment of annual fee |