CN201897209U - Low-temperature smoke corrosion prevention coal economizer for hot-water backflow - Google Patents
Low-temperature smoke corrosion prevention coal economizer for hot-water backflow Download PDFInfo
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- CN201897209U CN201897209U CN2010206076919U CN201020607691U CN201897209U CN 201897209 U CN201897209 U CN 201897209U CN 2010206076919 U CN2010206076919 U CN 2010206076919U CN 201020607691 U CN201020607691 U CN 201020607691U CN 201897209 U CN201897209 U CN 201897209U
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Abstract
A low-temperature smoke corrosion prevention coal economizer for hot-water backflow mainly has a structure that a water inlet of a serpentine finned pipe of the coal economizer is formed at the lower part outside a box body and connected with a water outlet of a mixing tank; the mixing tank is provided with two water inlets, one water inlet is connected with a cold water pipe, while the other water inlet water is connected with a water outlet of a circulation pump; a water inlet of the circulation pump is connected with an opening of a there-way pipe; the three-way pipe has another two openings, one opening is connected with a water outlet of the serpentine finned pipe arranged at the upper part of the box body, and the third other opening is connected with a hot water outlet of the coal economizer. The low-temperature smoke corrosion prevention coal economizer increases the water temperature at the inlet of the coal economizer, namely, increases the temperature of the wall of the serpentine pipe, thereby solving the low-temperature corrosion problem of the serpentine water heater and prolonging the service life of the serpentine water heater; and at the same time, the equipment has simple structure, high heat exchange efficiency and low manufacturing cost, and is easy to machine.
Description
Technical field: the utility model relates to a kind of heat exchanger, particularly finned tube exchanger.
Background technology: at present, economizer is widely used in the energy-saving equipment of industries such as oil, chemical industry, metallurgy, the economizer structure is identical substantially, it mainly is to constitute casing by structural steel frame and side plate, in casing, be provided with two parallel vertical tube sheets, the wave-fin pipe is zigzag and back and forth passes tube sheet, and by its support.Casing has two Inlet and outlet water collecting box pipes to link to each other with the wave-fin pipe outward, constitutes the passage of water.When flue gas enters and when casing is discharged down from casing, by the wave-fin pipe heat of flue gas is passed to water in the coiled pipe, so water is heated.The above-mentioned wave-fin Guan Yinshui side coefficient of heat transfer is very big, the coefficient of heat transfer than fume side is much bigger, therefore the tube wall temperature of wave-fin pipe is near water side temperature, coolant-temperature gage in the wave-fin pipe is lower, therefore the wave-fin pipe is easy to generate the low temperature acid dew piont corrosion, and this has seriously influenced the service life of equipment and the normal operation of system.Therefore people have taked a lot of methods: the ND steel, the stainless steel that adopt more anti-low temperature sulfur corrosion if any the people, but the ND steel is anti-, the stainless steel corrosion resistance is limited, corrosion resistance is about three times of ordinary carbon steel, can only delay corrosion, can not prevent cold end corrosion completely, owing to the low-temperature zone dewfall causes incrustation, exhaust gases passes is blocked simultaneously, the system that influences normally moves.
Summary of the invention: the purpose of this utility model is to provide a kind of heat exchange efficiency height, long service life, hot water simple in structure, that equipment cost is low to reflux and prevent that low-temperature flue gas corrodes economizer.
The utility model mainly is to increase a circulating pump between the gateway of existing economizer water, an economizer heated hot water part is entered the cold water mix of the blending tank and the economizer inlet of economizer entrance side by circulating pump.The utility model casing part is basic the same with prior art, promptly constitutes casing by structural steel frame and side plate, is provided with two parallel vertical tube sheets in casing, and the wave-fin pipe is zigzag and back and forth passes tube sheet.The water inlet of above-mentioned wave-fin pipe is located at the outer bottom of casing, it links to each other with the delivery port of blending tank, this blending tank has two water inlets, an one water inlet links to each other with cold water pipe, another water inlet links to each other with the circulating pump delivery port, and this circulating pump water inlet links to each other with an opening of three-way pipe, two openings in addition of this three-way pipe, one links to each other with the delivery port that is located at casing top wave-fin pipe, and another opening links to each other with the hot water outlet of this whole economizer.Preferably the fin of wave-fin pipe adopts " H " type fin, to prevent dust stratification.
Should reflux anti-low-temperature flue gas corrosion economizer when work by anti-hot water, also be that flue gas enters and discharges down from casing from casing, by the wave-fin pipe heat of flue gas passed to water in the coiled pipe.But an economizer heated hot water part is diverted in the blending tank by circulating pump, with the cold water mix that is entered blending tank by cold water pipe, improves the tube wall temperature of coiled pipe, and then improves the tube wall temperature of coiled pipe, prevents that cold end corrosion from producing.
The utility model compared with prior art has following advantage:
1, the utility model has improved the water temperature of economizer inlet, has promptly improved the tube wall temperature of coiled pipe, has solved the cold end corrosion problem of coiled pipe water heater, the service life of having improved the coiled pipe water heater.
2, device structure is simple, difficulty of processing is little, heat exchange efficiency height, low cost of manufacture.
Description of drawings:
Fig. 1 is that master of the present utility model looks the section simplified schematic diagram.
The specific embodiment: look in the section simplified schematic diagram the reflux master of anti-low-temperature flue gas corrosion economizer of hot water shown in Figure 1, be provided with two parallel vertical tube sheets 2 in the casing 1 that is made of structural steel frame and side plate, wave-fin pipe 3 is zigzag and back and forth passes tube sheet.The water inlet of above-mentioned wave-fin pipe is located at the outer bottom of casing, its delivery port with blending tank 4 links to each other, this blending tank has two water inlets, an one water inlet links to each other with cold water pipe 5, another water inlet links to each other with circulating pump 6 delivery ports, and this circulating pump water inlet links to each other with an opening of three-way pipe 7, two openings in addition of this three-way pipe, one links to each other with the delivery port that is located at casing top wave-fin pipe, and another opening links to each other with the hot water outlet of this whole economizer.
Claims (2)
1. a hot water refluxes and prevents low-temperature flue gas corrosion economizer, it is provided with two parallel vertical tube sheets by in structural steel frame and the casing that side plate constitutes, the wave-fin pipe is zigzag and back and forth passes tube sheet, it is characterized in that: the water inlet of above-mentioned wave-fin pipe is located at the outer bottom of casing, it links to each other with the delivery port of blending tank, this blending tank has two water inlets, an one water inlet links to each other with cold water pipe, another water inlet links to each other with the circulating pump delivery port, and this circulating pump water inlet links to each other with an opening of three-way pipe, two openings in addition of this three-way pipe, one links to each other with the delivery port that is located at casing top wave-fin pipe, and another opening links to each other with the hot water outlet of this whole economizer.
2. hot water according to claim 1 refluxes and prevents low-temperature flue gas corrosion economizer, and it is characterized in that: the fin of wave-fin pipe adopts H type fin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206076919U CN201897209U (en) | 2010-11-11 | 2010-11-11 | Low-temperature smoke corrosion prevention coal economizer for hot-water backflow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206076919U CN201897209U (en) | 2010-11-11 | 2010-11-11 | Low-temperature smoke corrosion prevention coal economizer for hot-water backflow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201897209U true CN201897209U (en) | 2011-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206076919U Expired - Fee Related CN201897209U (en) | 2010-11-11 | 2010-11-11 | Low-temperature smoke corrosion prevention coal economizer for hot-water backflow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201897209U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106247310A (en) * | 2016-08-28 | 2016-12-21 | 桂林市晶准测控技术有限公司 | A kind of environmental protection economizer |
| CN106322354A (en) * | 2016-08-28 | 2017-01-11 | 桂林市晶准测控技术有限公司 | Environment-friendly low-temperature coal economizer |
| CN106369586A (en) * | 2016-08-28 | 2017-02-01 | 桂林市晶准测控技术有限公司 | Environment-friendly energy-saving economizer |
| CN106369585A (en) * | 2016-08-28 | 2017-02-01 | 桂林市晶准测控技术有限公司 | Energy-saving low-temperature economizer |
| CN106369584A (en) * | 2016-08-28 | 2017-02-01 | 桂林市晶准测控技术有限公司 | Low-temperature economizer |
| CN106382618A (en) * | 2016-08-28 | 2017-02-08 | 桂林市晶准测控技术有限公司 | Energy-saving coal saver |
| CN106382747A (en) * | 2016-08-28 | 2017-02-08 | 桂林市晶准测控技术有限公司 | Environmental-friendly energy-saving boiler system |
-
2010
- 2010-11-11 CN CN2010206076919U patent/CN201897209U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106247310A (en) * | 2016-08-28 | 2016-12-21 | 桂林市晶准测控技术有限公司 | A kind of environmental protection economizer |
| CN106322354A (en) * | 2016-08-28 | 2017-01-11 | 桂林市晶准测控技术有限公司 | Environment-friendly low-temperature coal economizer |
| CN106369586A (en) * | 2016-08-28 | 2017-02-01 | 桂林市晶准测控技术有限公司 | Environment-friendly energy-saving economizer |
| CN106369585A (en) * | 2016-08-28 | 2017-02-01 | 桂林市晶准测控技术有限公司 | Energy-saving low-temperature economizer |
| CN106369584A (en) * | 2016-08-28 | 2017-02-01 | 桂林市晶准测控技术有限公司 | Low-temperature economizer |
| CN106382618A (en) * | 2016-08-28 | 2017-02-08 | 桂林市晶准测控技术有限公司 | Energy-saving coal saver |
| CN106382747A (en) * | 2016-08-28 | 2017-02-08 | 桂林市晶准测控技术有限公司 | Environmental-friendly energy-saving boiler system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110713 Termination date: 20111111 |