CN107504477A - A kind of pressure regulation heat-exchange system of low-level (stack-gas) economizer - Google Patents
A kind of pressure regulation heat-exchange system of low-level (stack-gas) economizer Download PDFInfo
- Publication number
- CN107504477A CN107504477A CN201610427111.XA CN201610427111A CN107504477A CN 107504477 A CN107504477 A CN 107504477A CN 201610427111 A CN201610427111 A CN 201610427111A CN 107504477 A CN107504477 A CN 107504477A
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- Prior art keywords
- gas
- economizer
- stack
- low
- level
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/003—Feed-water heater systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
Abstract
The present invention relates to heat exchanger applications field, a kind of more particularly to pressure regulation heat-exchange system of low-level (stack-gas) economizer, including low-level (stack-gas) economizer and heat medium system, low-level (stack-gas) economizer side is the exhaust gases passes by flue gas, low-level (stack-gas) economizer opposite side is heat medium passage, pass through heating agent derived from heat medium system, heat medium passage front end is provided with pressure-reducing valve, the pressure regulation heat-exchange system of low-level (stack-gas) economizer of the present invention, the heating agent of heat medium passage to inputting low-level (stack-gas) economizer is depressured, prevent from damaging caused by heating agent operating pressure is excessive to low-level (stack-gas) economizer, add the operating reliability of low-level (stack-gas) economizer；Simultaneously using the flow of flue gas runner of straight-through runner, it is therefore prevented that economizer internal blocking caused by flue gas laying dust, be advantageous to equipment normal operation.
Description
Technical field
The present invention relates to the pressure regulation heat-exchange system in heat exchanger applications field, more particularly to a kind of low-level (stack-gas) economizer.
Background technology
Low-level (stack-gas) economizer is mounted to a kind of device that boiler back end ductwork is used for recovery waste heat, and it absorbs low-temperature flue gas
Heat, the exhaust gas temperature of flue gas is reduced, saves the energy, improves efficiency, so referred to as low-level (stack-gas) economizer.
Low-level (stack-gas) economizer is flue gas cool-down, heating agent absorbs the heat of flue gas and for other by heating agent and flue gas heat exchange
Heat supply occasion and realize waste heat recovery, limited by heating agent application operating mode, when heating agent hypertonia, can be permitted more than low-level (stack-gas) economizer
Perhaps operating pressure, heating agent can not be now introduced directly into low-level (stack-gas) economizer and exchanged heat with flue gas.
The content of the invention
The technical problems to be solved by the invention are to overcome the deficiencies in the prior art, there is provided one kind is to being passed through province's coal
The pressure regulation heat-exchange system of the low-level (stack-gas) economizer of the heating agent pressure regulation of device heat medium passage.
The present invention is to be achieved by the following technical programs：
A kind of pressure regulation heat-exchange system of low-level (stack-gas) economizer, including low-level (stack-gas) economizer and heat medium system, low-level (stack-gas) economizer side
To be heat medium passage by the exhaust gases passes of flue gas, low-level (stack-gas) economizer opposite side, by heating agent derived from heat medium system, heating agent leads to
Road front end is provided with pressure-reducing valve.
The heat medium passage rear end of the low-level (stack-gas) economizer is provided with booster pump, to derived from low-level (stack-gas) economizer heating agent be pressurized,
Heating agent after supercharging leads back to heat medium system.
The low-level (stack-gas) economizer is straight channel plank frame heat exchanger, and the heat transfer of the straight channel plank frame heat exchanger is first
Part is corrugated cardboard sheet, and the fume side ripple's depth of the corrugated cardboard sheet is less than fume side plate flow channel, and the plate groups poststack exists
Fume side forms contactless board-like straight-through runner.
The beneficial effects of the invention are as follows：
The pressure regulation heat-exchange system of low-level (stack-gas) economizer of the present invention, pass through the heat medium passage to inputting low-level (stack-gas) economizer
Heating agent is depressured, and the heating agent after decompression is met the requirement of low-level (stack-gas) economizer operating pressure, prevents from saving low temperature because heating agent pressure is excessive
Coal device causes to damage, and adds the service life of equipment, while is pressurizeed by the heating agent after heat exchanging, the heating agent after pressurization
Return to stability operation of original heat medium system without influenceing original heat medium system；In addition, the flue gas by using straight-through runner
Flow runner, it is therefore prevented that economizer internal blocking caused by flue gas laying dust, be advantageous to equipment normal operation, in addition, also significantly carrying
The high heat transfer efficiency of low-level (stack-gas) economizer.
Brief description of the drawings
Fig. 1 is the attachment structure schematic diagram of the present invention.
Embodiment
In order that those skilled in the art more fully understand technical scheme, below in conjunction with the accompanying drawings and most
The present invention is described in further detail for good embodiment.
As illustrated, the present invention includes low-level (stack-gas) economizer and heat medium system, low-level (stack-gas) economizer side is the cigarette by flue gas
Gas passage, low-level (stack-gas) economizer opposite side are heat medium passage, and by heating agent derived from heat medium system, heat medium passage front end is provided with decompression
Valve.
The heating agent of circulation is after the depressurization of pressure-reducing valve in heat medium system, into the heat medium passage of low-level (stack-gas) economizer,
Ensure the pressure of heating agent in low-level (stack-gas) economizer within its pressure-bearing scope, prevent from producing low-level (stack-gas) economizer because heating agent pressure is excessive
Influence.
Preferably, the heat medium passage rear end of low-level (stack-gas) economizer is provided with booster pump, to derived from low-level (stack-gas) economizer heating agent increase
Pressure, the heating agent after supercharging lead back to heat medium system so that original heat medium system stable circulation.
Further, low-level (stack-gas) economizer is straight channel plank frame heat exchanger in the preferred embodiments of the present invention, described straight
The heat transfer element of the board-like structure heat exchanger of passage is corrugated cardboard sheet, and the fume side ripple's depth of the corrugated cardboard sheet is less than fume side
Plate flow channel, the plate groups poststack form contactless board-like straight-through runner in fume side.
Because flow of flue gas runner is straight-through runner, runner is held essentially constant along the circulating direction of flue gas, while is disappeared again
Except the influence of contact, thus from smoke inlet to outlet, field of flow is consistent substantially, eliminates particulate matter blocking and incrustation
Precondition, also can thoroughly solve the problems, such as the laying dust of flue gas.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (3)
1. the pressure regulation heat-exchange system of a kind of low-level (stack-gas) economizer, it is characterised in that including low-level (stack-gas) economizer and heat medium system, low temperature saves
Coal device side is the exhaust gases passes by flue gas, and low-level (stack-gas) economizer opposite side is heat medium passage, by hot derived from heat medium system
Matchmaker, heat medium passage front end are provided with pressure-reducing valve.
2. the pressure regulation heat-exchange system of a kind of low-level (stack-gas) economizer according to claim 1, it is characterised in that the low temperature saves coal
The heat medium passage rear end of device is provided with booster pump, to derived from low-level (stack-gas) economizer heating agent be pressurized, the heating agent after supercharging leads back to heating agent
System.
3. the pressure regulation heat-exchange system of a kind of low-level (stack-gas) economizer according to claim 1, it is characterised in that the low temperature saves coal
Device is straight channel plank frame heat exchanger, and the heat transfer element of the straight channel plank frame heat exchanger is corrugated cardboard sheet, the ripple
The fume side ripple's depth of card piece is less than fume side plate flow channel, and the plate groups poststack forms contactless board-like in fume side
Straight-through runner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610427111.XA CN107504477A (en) | 2016-06-14 | 2016-06-14 | A kind of pressure regulation heat-exchange system of low-level (stack-gas) economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610427111.XA CN107504477A (en) | 2016-06-14 | 2016-06-14 | A kind of pressure regulation heat-exchange system of low-level (stack-gas) economizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107504477A true CN107504477A (en) | 2017-12-22 |
Family
ID=60679048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610427111.XA Pending CN107504477A (en) | 2016-06-14 | 2016-06-14 | A kind of pressure regulation heat-exchange system of low-level (stack-gas) economizer |
Country Status (1)
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| CN (1) | CN107504477A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110372142A (en) * | 2019-07-10 | 2019-10-25 | 中国华电科工集团有限公司 | A kind of device using low-grade flue gas processing waste water |
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| JP2009162449A (en) * | 2008-01-09 | 2009-07-23 | Toshiba Corp | Exhaust heat recovery boiler device |
| CN101806230A (en) * | 2010-03-19 | 2010-08-18 | 湖南永清环保股份有限公司 | System and method for using sintering waste heat to generate electricity |
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| CN103673650A (en) * | 2013-12-13 | 2014-03-26 | 南京凯盛开能环保能源有限公司 | Steel mill surplus gas and sanitary steam comprehensive utilization system and method |
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| CN110372142A (en) * | 2019-07-10 | 2019-10-25 | 中国华电科工集团有限公司 | A kind of device using low-grade flue gas processing waste water |
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