CN101922702A - Flue gas waste heat recovery device for gas-oil boiler and system thereof - Google Patents
Flue gas waste heat recovery device for gas-oil boiler and system thereof Download PDFInfo
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- CN101922702A CN101922702A CN2009100527254A CN200910052725A CN101922702A CN 101922702 A CN101922702 A CN 101922702A CN 2009100527254 A CN2009100527254 A CN 2009100527254A CN 200910052725 A CN200910052725 A CN 200910052725A CN 101922702 A CN101922702 A CN 101922702A
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- boiler
- soft water
- flue gas
- bypass
- flue
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Abstract
The invention relates to a flue gas waste heat recovery device for a gas-oil boiler and a system thereof, in particular to efficient and energy-saving equipment for recovering waste heat of flue gas discharged from the gas-oil boiler. The flue gas waste heat recovery device is characterized by comprising a self-acting baffle plate, a bypass flue, a soft water heater, a water seal device, a soft water pump, a bypass fan and a bypass chimney; and the device has the characteristics of corrosion resistance, smooth emission of condensate water, small volume and no influence on the boiler and is capable of minimally reducing temperature of the flue gas to below 60 DEG C. In the invention, the self-acting baffle plate can perform self-action on the basis of the operating condition of the bypass fan, thus avoiding influence of the device on a boiler system; the soft water heater transfers the waste heat of the flue gas to soft water in a strengthened heat transfer manner, so the waste heat can be reused by the boiler; and meanwhile condensation moisture can be smoothly discharged during the process of cooling the flue gas, and the bypass fan can provide resistance for the device system, thus improving safety of the boiler system.
Description
Technical field:
The present invention relates to flue gas waste heat recovery device for gas-oil boiler and system, be applied to relate to fields such as energy-saving and environmental protection on the gas fuel boiler.
Background technology:
The tail gas of gas fuel boiler is owing to be subjected to the limit value of boiler working medium temperature, and temperature can reach more than 200 ℃, and the flue gas heat of this part can reclaim and be used.The major part boiler does not reclaim this part heat, and has the problem that flue resistance is big, the interruption feedwater causes interruption heat transfer, afterbody dewing corrosion for the traditional waste-heat recovery devices such as economizer of small part boiler use yet.
Summary of the invention:
The objective of the invention is at the characteristics of gas fuel boiler and the deficiency of legacy equipment, a cover boiler exhaust gas retracting device and a system is provided, the boiler exhaust gas heat is at utmost utilized.
For realizing such purpose, the present invention is according to gas fuel boiler operatiopn characteristics, on the chimney of boiler, connected by-pass flue, and the soft water heater and the blower fan of recyclable flue gas heat be installed on by-pass flue, on chimney and by-pass flue, designed and moved baffle door certainly, the soft water of soft water heater draws to drive from softened water tank and by softened water pump and circulates, so just can guarantee under the prerequisite that does not influence boiler operatiopn, the soft water that circulates is passed to the waste heat of flue gas on continuous high-efficient ground, improve the thermal efficiency of boiler, saved fuel.
Gas fuel boiler afterheat recovering device of the present invention by by-pass flue, soft water heater, move baffle door, blower fan, softened water pump and soft water pipeline certainly and form.Link to each other at the boiler chimney upper opening and with by-pass flue, install from moving baffle door at interface, soft water heater is installed behind the by-pass flue, soft water heater adopts stainless steel finned tube formula heat exchanger, air-introduced machine is installed, with flow through soft water heater and discharge of boiler exhaust gas suction by-pass flue behind the soft water heater; Soft water is drawn after softened water pump is squeezed into soft water heater water side heat-exchanging tube bundle from softened water tank, flows back to softened water tank after the heating.
By-pass flue is a square flue, is 30～60 ° with boiler chimney, has one from moving baffle plate at by-pass flue and chimney junction, and when the blower fan of by-pass flue was failure to actuate, the baffle plate that moves certainly was in chimney path, by-pass flue closed condition; When the by-pass flue blower fan moved, under the effect of by-pass flue flue gas stream, the baffle plate that moves certainly was in that chimney is closed, the state of by-pass flue path.So promptly can prevent from when by-pass flue moves the air of chimney breast is sucked, can avoid when heat recovery equipment breaks down, influencing simultaneously the operation of boiler plant again.
Soft water heater is the heat exchanger with the heat transferred soft water of flue gas, because sulfur content is lower in the flue gas, but still there is the danger of corrosivity weak acid dewfall such as carbon dioxide, so the heat exchange element material is selected corrosion resistant stainless steel for use, for increasing heat exchange efficiency, heat exchange element adopts high frequency welding spiral fin tube, flue gas transversal flow heat-exchanging tube bundle, and the adjutage that is connected with water seal arrangement is installed in the soft water heater bottom.Soft water heater water side entrance connects the softened water pump outlet, and the softened water pump inlet connects the bottom of softened water tank, and soft water heater water side outlet connects softened water tank top and enters softened water tank.
The by-pass flue air-introduced machine links to each other with soft water heater exhanst gas outlet side, and the blower fan outlet connects the bypass chimney, and the boiler export flue gas is entered atmosphere after chimney is drawn.
Description of drawings:
Fig. 1 is the side view of gas fuel residual heat reclaiming apparatus for boiler vent gas of the present invention.
Fig. 2 for gas fuel residual heat reclaiming apparatus for boiler vent gas of the present invention from moving the scheme of installation of baffle plate.
Among Fig. 1 and Fig. 2: 1 is boiler chimney, and 2 for moving baffle plate certainly, and 3 is by-pass flue, and 4 is softened water tank, and 5 is soft water heater, and 6 is water seal arrangement, and 7 is softened water pump, and 8 is the bypass blower fan, and 9 is the bypass chimney, and 10 is self-lubricating bearing.
The specific embodiment: technical scheme of the present invention is further described below in conjunction with accompanying drawing.
Gas fuel residual heat reclaiming apparatus for boiler vent gas structure of the present invention is as shown in Figure 1: mainly by moving baffle plate 2 certainly, and by-pass flue 3, soft water heater 5, water seal arrangement 6, softened water pump 7, bypass blower fan 8 and bypass chimney 9 are formed.By-pass flue 3 is the square flue of welding, be 30～60 ° of angle welding with boiler chimney, have one from moving baffle plate 2 at by-pass flue 3 and chimney 1 junction, when bypass blower fan 8 was failure to actuate, the baffle plate 2 that moves certainly was in chimney 1 path, by-pass flue 3 closed conditions; When bypass blower fan 8 action, under the effect of by-pass flue 3 flue gas stream, the baffle plate 2 that moves certainly is in that chimney 1 is closed, the state of by-pass flue 3 paths.So both can prevent that the air that when 8 operations of bypass blower fan chimney 1 is exported from sucking, simultaneously again can be when bypass blower fan 8 break down, boiler plant recovers original operation.
The soft water heater bottom half is installed the water seal arrangement 6 that is connected with water distribution structure, it by water-filled water pot be connected soft water heater 5 bottom halves and insert forming communicating pipe of water pot bottom, in flue gas, there is water to condense, condensate water flows into water pot, guarantee the sealing of this communicating pipe simultaneously, prevent that outside air from bleeding.When heat exchange element leaks, soft water also can flow out from water seal arrangement 6, does not influence the operation of boiler.
Bypass air-introduced machine 8 links to each other with soft water heater 5 flue outlet sides, and for preventing dewfall, bypass blower fan 8 needs insulation, and 8 outlets of bypass blower fan connect bypass chimney 9, and the flue gas that boiler is discharged enters atmosphere from bypass chimney 9.
As shown in Figure 2: the baffle plate 2 that moves certainly is welded to form by chimney 1 side and two baffle plates of by-pass flue 3 sides and self-lubricating bearing 10.
Claims (1)
1. gas fuel residual heat reclaiming apparatus for boiler vent gas and system is characterized in that by moving baffle plate 2 certainly, by-pass flue 3, soft water heater 5, water seal arrangement 6, softened water pump 7, bypass blower fan 8 and bypass chimney 9 formations; By-pass flue 3 is the square flue of welding, is 30～60 ° of angle welding with boiler chimney, has one from moving baffle plate 2 at by-pass flue 3 and chimney 1 junction; By-pass flue 3 backs connect soft water heater 5, and soft water heater 5 water side entrances connect the soft water of softened water pump 7 confessions under the softened water tank, and soft water heater 5 water side outlets connect softened water tank top; Soft water heater 5 lower box water receiving seal apparatus 6; The outlet of soft water heater 5 casings connects the bypass blower fan 8 of insulation, connects bypass chimney 9 behind the bypass blower fan 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100527254A CN101922702A (en) | 2009-06-09 | 2009-06-09 | Flue gas waste heat recovery device for gas-oil boiler and system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100527254A CN101922702A (en) | 2009-06-09 | 2009-06-09 | Flue gas waste heat recovery device for gas-oil boiler and system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101922702A true CN101922702A (en) | 2010-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100527254A Pending CN101922702A (en) | 2009-06-09 | 2009-06-09 | Flue gas waste heat recovery device for gas-oil boiler and system thereof |
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| CN (1) | CN101922702A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006371A (en) * | 2014-06-12 | 2014-08-27 | 常熟浦发热电能源有限公司 | Device and method for waste heat recovery based on control over outlet smoke temperature |
| CN104359110A (en) * | 2014-11-03 | 2015-02-18 | 合肥工业大学 | Garbage incinerator with moisture stripping device |
| CN105964191A (en) * | 2016-06-30 | 2016-09-28 | 宜兴市前成生物有限公司 | Reaction system for fumaric acid oxidizing stage |
-
2009
- 2009-06-09 CN CN2009100527254A patent/CN101922702A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006371A (en) * | 2014-06-12 | 2014-08-27 | 常熟浦发热电能源有限公司 | Device and method for waste heat recovery based on control over outlet smoke temperature |
| CN104006371B (en) * | 2014-06-12 | 2016-01-20 | 常熟浦发热电能源有限公司 | Based on waste-heat recovery device and the exhaust heat recovering method of outlet fibre selection |
| CN104359110A (en) * | 2014-11-03 | 2015-02-18 | 合肥工业大学 | Garbage incinerator with moisture stripping device |
| CN104359110B (en) * | 2014-11-03 | 2016-09-14 | 合肥工业大学 | A kind of incinerator of band moisture stripping off device |
| CN105964191A (en) * | 2016-06-30 | 2016-09-28 | 宜兴市前成生物有限公司 | Reaction system for fumaric acid oxidizing stage |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| DD01 | Delivery of document by public notice |
Addressee: Shanghai Wangte Energy Resource Science & Technology Co., Ltd. Document name: the First Notification of an Office Action |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20101222 |