CN201866751U - Combined coal economizer for preventing flue gas low temperature corrosion - Google Patents
Combined coal economizer for preventing flue gas low temperature corrosion Download PDFInfo
- Publication number
- CN201866751U CN201866751U CN2010206076923U CN201020607692U CN201866751U CN 201866751 U CN201866751 U CN 201866751U CN 2010206076923 U CN2010206076923 U CN 2010206076923U CN 201020607692 U CN201020607692 U CN 201020607692U CN 201866751 U CN201866751 U CN 201866751U
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- tube
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- heat exchanger
- coal economizer
- flue gas
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Abstract
The utility model provides a combined coal economizer for preventing flue gas low temperature corrosion, which comprises a box body formed by a section steel frame and side plates, wherein two parallel vertical tube sheets are arranged in the box body; a snake-shaped finned tube zigzag passes through the tube sheets in a reciprocating manner; a water outlet of the snake-shaped finned tube is communicated with a head at one end of a shell-and-tube heat exchanger; a head at the other end of the shell-and-tube heat exchanger is provided with a hot water outlet of the whole coal economizer; a water inlet of the snake-shaped finned tube is connected with a cold water outlet on a shell body wall of the shell-and-tube heat exchanger; and a cold water inlet on the shell body wall is connected with a cold water feeding tube. In the utility model, cold water at a water inlet of the coal economizer is heated, the water temperature of the water inlet of the coal economizer is increased, namely the tube wall temperature of a heat tube is increased, the problem of low temperature corrosion of a snake tube water heater is solved, the service life of the snake tube water heater is prolonged, and the combined coal economizer has the advantages of simple equipment structure, little processing difficulty, high heat exchange efficiency and low manufacturing cost.
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, simple in structure, anti-flue gas cold end corrosion integral economizer that equipment cost is low.
The utility model mainly is to set up a shell-and-tube heat exchanger at existing economizer delivery port, enter in the heat exchanger tube of shell-and-tube heat exchanger through the hot water of economizer heating, and the cold water that enters economizer enters the economizer water inlet outward again through above-mentioned heat exchanger tube earlier.The utility model casing part is the same with prior art, promptly is provided with two parallel vertical tube sheets by in structural steel frame and the casing that side plate constitutes, and the wave-fin pipe is zigzag and back and forth passes tube sheet, and by its support.The delivery port of above-mentioned wave-fin pipe is connected with the end socket of shell-and-tube heat exchanger one end, and the end socket of this shell-and-tube heat exchanger other end is established the hot water outlet of whole economizer.The water inlet of above-mentioned wave-fin pipe links to each other with cooling water outlet on the aforementioned tube shell heat exchanger housing wall, and the cooling water inlet on this housing wall links to each other with the feed pipe of cold water.Best, be provided with deflection plate in the shell-and-tube heat exchanger housing discontinuously.The fin of wave-fin pipe adopts " H " type fin, prevents dust stratification.
Should anti-flue gas cold end corrosion integral economizer when work, also be that flue gas enters and discharges down from casing from casing, by the wave-fin pipe heat of flue gas is passed to water in the coiled pipe.But in the economizer heated hot water enters the heat exchanger tube of shell-and-tube heat exchanger, the outer cold water that will enter the wave-fin pipe of heat exchanger tube carries out exchange heat with flowing through, and be heated, improved the water temperature of economizer water inlet, and then improved the tube wall temperature of coiled pipe, prevent to produce corrosion because of low temperature.
The utility model compared with prior art has following advantage:
1, the utility model improves the water temperature of economizer water inlet with the cold water heating of economizer water 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: the master at anti-flue gas cold end corrosion integral economizer shown in Figure 1 looks in the section simplified schematic diagram, is provided with two parallel vertical tube sheets 2 in the casing 1 that is made of structural steel frame and side plate, and wave-fin pipe 3 is and back and forth passes tube sheet in a zigzag.The delivery port of above-mentioned wave-fin pipe is connected with the end socket of shell-and-tube heat exchanger 4 one ends, and the end socket of this shell-and-tube heat exchanger other end is established the hot water outlet of whole economizer.The water inlet of above-mentioned wave-fin pipe links to each other with cooling water outlet 5 on the aforementioned tube shell heat exchanger housing wall, and the cooling water inlet 6 on this housing wall links to each other with the feed pipe of cold water.Be provided with deflection plate 7 discontinuously in the aforementioned tube shell heat exchanger housing.The fin of wave-fin pipe adopts " H " type fin.
Claims (3)
1. anti-flue gas cold end corrosion integral 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 delivery port of above-mentioned wave-fin pipe is connected with the end socket of shell-and-tube heat exchanger one end, the end socket of this shell-and-tube heat exchanger other end is established the hot water outlet of whole economizer, the water inlet of above-mentioned wave-fin pipe links to each other with cooling water outlet on the aforementioned tube shell heat exchanger housing wall, and the cooling water inlet on this housing wall links to each other with the feed pipe of cold water.
2. anti-flue gas cold end corrosion integral economizer according to claim 1 is characterized in that: be provided with deflection plate in the shell-and-tube heat exchanger housing discontinuously.
3. anti-flue gas cold end corrosion integral economizer according to claim 1 and 2 is characterized in that: the fin of wave-fin pipe adopts H type fin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206076923U CN201866751U (en) | 2010-11-11 | 2010-11-11 | Combined coal economizer for preventing flue gas low temperature corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206076923U CN201866751U (en) | 2010-11-11 | 2010-11-11 | Combined coal economizer for preventing flue gas low temperature corrosion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201866751U true CN201866751U (en) | 2011-06-15 |
Family
ID=44137905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206076923U Expired - Fee Related CN201866751U (en) | 2010-11-11 | 2010-11-11 | Combined coal economizer for preventing flue gas low temperature corrosion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201866751U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023818A (en) * | 2017-05-22 | 2017-08-08 | 山西中源科扬节能服务有限公司 | Improved cooling coal economizer for power stations |
-
2010
- 2010-11-11 CN CN2010206076923U patent/CN201866751U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023818A (en) * | 2017-05-22 | 2017-08-08 | 山西中源科扬节能服务有限公司 | Improved cooling coal economizer for power stations |
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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: 20110615 Termination date: 20131111 |