CN2883942Y - Separating fume reheater - Google Patents
Separating fume reheater Download PDFInfo
- Publication number
- CN2883942Y CN2883942Y CN 200620068311 CN200620068311U CN2883942Y CN 2883942 Y CN2883942 Y CN 2883942Y CN 200620068311 CN200620068311 CN 200620068311 CN 200620068311 U CN200620068311 U CN 200620068311U CN 2883942 Y CN2883942 Y CN 2883942Y
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- CN
- China
- Prior art keywords
- heat exchange
- smoke
- flue gas
- exchange device
- gas heat
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- Expired - Lifetime
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Abstract
The utility model discloses a separation smoke re-heater, relating to a heat exchange used for the remaining heat withdrawing in the power plant smoke de-sulfur or similar field. The smoke re-heater is composed of a raw smoke heat exchange (1) and a refined smoke heat exchange (3). A big space distance is arranged between the raw smoke side (1) and the refined smoke side (3), and the two sections are communicated by a steam pipe (2) and a condensed water pipe (4), that is, the output end of the raw smoke heat exchange (1) of the raw smoke side (1)is connected with the input end of the refined smoke heat exchange (3) of the refined smoke side (3), the output end of the heat exchange of the refined smoke side (3) via the condensed water pipe (4) is connected with the input end of the heat exchange of the raw smoke side (1), which is formed a circulation loop. The separation smoke re-heater comparing with the common smoke re-heater has no leakage of the smoke, fixable arrangement, strong adaptability to the loading variation of the mainframe, and lower energy consumption.
Description
Technical field
The utility model relates to a kind of heat exchanger that is used for means of flue gas desulfurization of power plant or similar field recovery waste heat, and conventional smoke re-heater has no flue gas leakage, flexible arrangement, main unit load is changed the strong and lower characteristics of energy consumption of adaptive faculty.
Background technology
In present known this field, common smoke re-heater (GGH) has two kinds: swinging GGH and hydrophily formula GGH.The former shortcoming comprises: one, owing to there be the leakage problem of former flue gas to clean flue gas in the self structure reason, can pollute the clean flue gas after the desulfurization, reduce desulfuration efficiency; Two, swinging GGH belongs to the monoblock type heat exchanger, and the relative heat exchanger in position of flue turnover is fixed, can't flexible arrangement; Three, when reducing, main unit load can't guarantee the clean exhanst gas outlet temperature that requires; Four, the existence of all kinds of moving equipment makes energy consumption very high.The latter is divided into former fume side and clean fume side, utilizes the water under high pressure of reciprocation cycle to reach the purpose of heat exchange, can also be aided with Steam Heating when underload.Therefore, the latter can overcome first three shortcoming that swinging GGH exists.But the energy consumption of big flow, high-lift water circulating pump is still very high.
Summary of the invention
Technical problem: in order to overcome the problem that existing smoke re-heater exists, the utility model provides a kind of separated smoke re-heater, and it utilizes the evaporative condenser of recirculated water to realize the purpose of flue gas reheat.
Technical scheme: separated smoke re-heater of the present utility model is divided into former flue gas heat exchange device and clean flue gas heat exchange device two parts, between former flue gas heat exchange device and the clean flue gas heat exchange device bigger space length is arranged; These two parts are communicated with by vapor uptake and condensate water down-comer, the output that is former flue gas heat exchange device joins by the input of vapor uptake with clean flue gas heat exchange device, the output of clean flue gas heat exchange device forms a closed circuit by the input termination of condensate water down-comer and former flue gas heat exchange device.
In the condensate water down-comer, be serially connected with the steam auxiliary heater, under the underload situation, be aided with Steam Heating to satisfy clean exhanst gas outlet temperature requirement.Former flue gas heat exchange device and clean flue gas heat exchange device adopt the helical fin tube bank, or adopt the plate-type heat-exchange sheet, or for having the plate-type heat-exchange sheet of dual corrugated structure.
Heat-exchange method is: this smoke re-heater is divided into former fume side and clean fume side two parts, these two parts are communicated with by vapor uptake and condensate water down-comer, former fume side is provided with the former flue gas heat exchange device with hot cigarette heat release feedwater or vapour, and clean fume side is provided with the clean flue gas heat exchange device of the exothermic heat of water or vapour being given clean flue gas; Former fume side is to realize heat exchange by the covert suction/thermal discharge of dielectric fluid-vapour, vapour-liquid circulation and by wherein vapour or liquid carrier pipe to clean fume side transmission heat, and promptly in former fume side, hot flue gas is passed to circulating fluid with heat; Evaporate behind the heated liquid, the steam that produces arrives clean fume side along vapor uptake, discharges the latent heat of vaporization and condenses into liquid, under the effect of gravity or water pump, get back to former fume side through the condensate water down-comer, the operation that so moves in circles realizes heating the purpose of clean flue gas.
Exist under the situation that is fit to the discrepancy in elevation in former fume side and clean fume side, can utilize gravity to realize the Natural Circulation of water; Otherwise just promote, promptly in the condensate water down-comer, be serially connected with water pump with water pump.Because utilized the phase-change heat transfer of water to transmit heat, so the amount of recirculated water is fewer, even added water pump, its energy consumption is also lower.
Beneficial effect: separated smoke re-heater is divided into two independent parts, and former flue gas and clean flue gas are isolated separately fully, has stopped the leakage of former flue gas to clean flue gas; Can select to be fit to the material of its working environment economically separately so that the flexible arrangement of equipment on flue is convenient; With steam thermal source as a supplement, can under the underload situation, still guarantee higher clean exhanst gas outlet temperature; Energy consumption is lower, consumes under the Natural Circulation situation even not.
Description of drawings
Fig. 1 is a structure principle chart of the present utility model.
Fig. 2 is the structural representation of the heat exchanger of the utility model helical fin tube bank.
Fig. 3 is the left view of Fig. 2.
Fig. 4 is the structural representation of the utility model plate-type heat-exchange sheet.
Fig. 5 is the vertical view that Fig. 4 is.
Fig. 6 is the plate-type heat-exchange chip architecture schematic diagram that the utlity model has dual corrugated structure.
Fig. 7 is the vertical view that Fig. 6 is.
Have among the above figure: former flue gas heat exchange device 1, vapor uptake 2, clean flue gas heat exchange device 3, water down-comer 4, auxiliary heater 5, water pump 6, upper header 7, spiral fin coil 8, lower collecting box 9, corrugated cardboard sheet 10, dual corrugated sheet 11.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is elaborated.
As Fig. 1, separated smoke re-heater is divided into two parts, promptly former flue gas heat exchange device 1 and the clean clean flue gas heat exchange device 3 of fume side.These two parts are independently to separate, and have fundamentally stopped the leakage of former flue gas to clean flue gas, and can freely arrange on flue.In addition, also can select suitable material at environment characteristics separately.These two parts are communicated with to get up by vapor uptake 2 and condensate water down-comer 4, form a closed circuit.Exist under the situation that is fit to the discrepancy in elevation at former flue gas heat exchange device 1 and clean flue gas heat exchange device 3, can utilize gravity to realize the Natural Circulation of water; Otherwise just promote with water pump 6.Because utilized the phase-change heat transfer of water to transmit heat, so the amount of recirculated water is fewer, even added water pump 6, its energy consumption is also lower.
Before the reheater work, need add a certain amount of working media-water of people in the heat exchanger fin of former flue gas heat exchange device 1 (also can be other low-boiling point liquid, as methyl alcohol, acetone etc.), and vaporize easily for water or other liquid, also need water circulation channel done vacuumizing processing.During work, at former flue gas heat exchange device 1, hot flue gas is passed to recirculated water with heat; Evaporation after water is heated, the steam that produces arrives clean flue gas heat exchange device 3 along vapor uptake 2 and discharges the latent heat of vaporization and condense into water, under the effect of gravity or water pump, get back to former flue gas heat exchange device 1 through water down-comer 4, the operation that so moves in circles realizes heating the purpose of clean flue gas.Fall auxiliary heater 5 of middle increase of pipe 4 under water, under the underload situation, can be aided with Steam Heating to satisfy clean exhanst gas outlet temperature requirement.
Heat exchange element in the separated smoke re-heater can adopt helical fin tube bank as shown in Figure 2, also can adopt Fig. 3,4 plate-type heat-exchange sheet.The helical fin tube bank is made of some spiral fin coils 8, upper header 7, lower collecting box 9, and water and steam are walked in the tube bank during work, and flue gas is walked outside the tube bank, and the outer fin of pipe can remedy the low shortcoming of the gas-to-gas heat exchanger coefficient of heat transfer.The plate-type heat-exchange sheet is processed by two corrugated cardboard sheets 10, and water and steam are walked in the heat exchanger fin during work, and flue gas is walked the gap of adjacent heat exchanger fin.Dual corrugated sheet 11 is made up of the different corrugated sheet of two plate curvatures, and water and steam are walked in the heat exchanger fin during work, and flue gas is walked the gap of adjacent heat exchanger fin.Adopt Fig. 3,4 separated smoke re-heater compact more, heat transfer property is better.
Claims (4)
1, a kind of separated smoke re-heater is characterized in that this smoke re-heater is divided into former flue gas heat exchange device (1) and clean flue gas heat exchange device (3) two parts, has bigger space length between former flue gas heat exchange device (1) and the clean flue gas heat exchange device (3); These two parts are communicated with to get up by vapor uptake (2) and condensate water down-comer (4), the output that is former flue gas heat exchange device (1) joins by the input of vapor uptake (2) with clean flue gas heat exchange device (3), output in the clean flue gas heat exchange device (3) forms a closed circuit by the input termination in condensate water down-comer (4) and the former flue gas heat exchange device (1).
2. separated smoke re-heater according to claim 1 is characterized in that being serially connected with water pump (6) in condensate water down-comer (4).
3. separated smoke re-heater according to claim 1 and 2 is characterized in that being serially connected with steam auxiliary heater (5) in condensate water down-comer (4), is aided with Steam Heating to satisfy clean exhanst gas outlet temperature requirement under the underload situation.
4, separated smoke re-heater according to claim 1 is characterized in that former flue gas heat exchange device (1) and clean flue gas heat exchange device (3) adopt the helical fin tube bank, or adopts the plate-type heat-exchange sheet, or for having the plate-type heat-exchange sheet of dual corrugated structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620068311 CN2883942Y (en) | 2006-01-10 | 2006-01-10 | Separating fume reheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620068311 CN2883942Y (en) | 2006-01-10 | 2006-01-10 | Separating fume reheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2883942Y true CN2883942Y (en) | 2007-03-28 |
Family
ID=37957004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620068311 Expired - Lifetime CN2883942Y (en) | 2006-01-10 | 2006-01-10 | Separating fume reheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2883942Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997267A (en) * | 2012-12-19 | 2013-03-27 | 杭州国电机械设计研究院有限公司 | Smoke reheating device of combining phase-change heat exchanger with net gas heater |
| CN103574630A (en) * | 2012-07-19 | 2014-02-12 | 中国电力工程顾问集团华东电力设计院 | Method for improving temperature of smoke discharged by chimney of thermal power plant, smoke heating system and thermal power generation unit |
| CN104266208B (en) * | 2014-09-16 | 2016-09-21 | 余伟俊 | A kind of afterheat recovery type boiler smoke wet desulfurization system |
-
2006
- 2006-01-10 CN CN 200620068311 patent/CN2883942Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103574630A (en) * | 2012-07-19 | 2014-02-12 | 中国电力工程顾问集团华东电力设计院 | Method for improving temperature of smoke discharged by chimney of thermal power plant, smoke heating system and thermal power generation unit |
| CN103574630B (en) * | 2012-07-19 | 2016-08-03 | 中国电力工程顾问集团华东电力设计院有限公司 | Improve the method for temperature of smoke discharged by chimney of thermal power and flue gas heating system and fired power generating unit |
| CN102997267A (en) * | 2012-12-19 | 2013-03-27 | 杭州国电机械设计研究院有限公司 | Smoke reheating device of combining phase-change heat exchanger with net gas heater |
| CN102997267B (en) * | 2012-12-19 | 2015-06-03 | 杭州华电能源工程有限公司 | Smoke reheating device of combining phase-change heat exchanger with net gas heater |
| CN104266208B (en) * | 2014-09-16 | 2016-09-21 | 余伟俊 | A kind of afterheat recovery type boiler smoke wet desulfurization system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070328 |
|
| EXPY | Termination of patent right or utility model |