CN201866752U - Helical baffle sleeve type coal economizer for preventing flue gas low temperature corrosion - Google Patents
Helical baffle sleeve type coal economizer for preventing flue gas low temperature corrosion Download PDFInfo
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- CN201866752U CN201866752U CN2010206076957U CN201020607695U CN201866752U CN 201866752 U CN201866752 U CN 201866752U CN 2010206076957 U CN2010206076957 U CN 2010206076957U CN 201020607695 U CN201020607695 U CN 201020607695U CN 201866752 U CN201866752 U CN 201866752U
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- flue gas
- finned
- tube sheet
- housing
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Abstract
The utility model provides a helical baffle sleeve type coal economizer for preventing flue gas low temperature corrosion, which is mainly characterized in that finned tubes are straight tubes externally provided with fins, wherein one end of each finned tube is closed and is placed in a through-hole of a support plate, which is corresponding to the end of the finned tube; the other end of each finned tube is open and is arranged in a through-hole of a middle tube sheet, which is corresponding to the end of the finned tube; water passing tubes, of which the outer diameters are smaller than the inner diameters of the finned tubes, are inserted in the finned tubes; one end of each water passing tube is close to the closed end of the corresponding finned tube, and the other end of each water passing tube passes through a clearance between the middle tube sheet and an end tube sheet; the end part of each water passing tube is arranged in a through-hole of the end tube sheet, which is corresponding to the end part of the water passing tube; the outer surface of a finned tube bundle is provided with a flue gas cavity; the upper part of a shell of the flue gas cavity is provided with a flue gas inlet tube, and the lower part of the shell of the flue gas cavity is provided with a flue gas outlet tube; the lower surface of a shell between the middle tube sheet and the end tube sheet is provided with a water outlet tube; the outer surface of the end tube sheet is provided with a tube box, and the upper part of the end tube sheet is provided with a water inlet tube; and in addition, a baffle is arranged in the shell corresponding to the finned tubes. The coal economizer has the advantages of high heat exchange efficiency, long service life, simple structure and low equipment 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, mainly be by the casing that has structural steel frame and side plate to constitute, the wave-fin pipe is arranged in casing, casing has two Inlet and outlet water collecting box pipes to link to each other with the wave-fin pipe outward, constitutes the water wing passage.Flue gas flows in 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 has very big, than big many of the coefficient of heat transfer of fume side, 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 or stainless steel that adopts more anti-low temperature sulfur corrosion if any the people, but ND steel or stainless steel corrosion resistance is limited, can only delay corrosion, can not prevent cold end corrosion completely, simultaneously owing to the low-temperature zone dewfall causes incrustation, exhaust gases passes is blocked, and 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 helical baffles bushing type economizer that equipment cost is low.
The utility model mainly is that the wave-fin pipe with original economizer makes straight connector formula finned tube into, and promptly finned tube is the straight tube of peripheral hardware fin, and preferably fin adopts H type fin, to prevent dust stratification.This finned tube one end sealing also places in the gripper shoe through hole corresponding with it, and the finned tube other end is an opening, and it is located in the sagging plate through hole corresponding with it, and this openend and finned tube main body lay respectively at the both sides of sagging plate.In above-mentioned finned tube, be inserted with the water service pipe of external diameter less than its internal diameter, both forming sleeves, the nearly finned tube blind end of this water service pipe one termination, the other end passes the gap between sagging plate and the end tube sheet, the end is located in the end tube sheet through hole corresponding with it, and this side opening of water service pipe and water service pipe main body lay respectively at the both sides of end tube sheet.Above-mentioned finned tube has some, and they form finned-tube bundle.Be provided with the housing that they are contained and seal in this finned-tube bundle outside, preferably housing seals the cylindrical shell that the other end links to each other with sagging plate for an end that can bear elevated pressures, this housing and sagging plate connect and compose the flue gas chamber, flue gas inlet tube is established on housing top in this flue gas chamber, and smoke outlet tube is established in the bottom.Sagging plate and end also are provided with between the tube sheet and the water service pipe in it are contained and the housing of sealing, i.e. water chamber, and the housing below it is provided with outlet pipe.End tube sheet outside is provided with contains also coupled bobbin carriage with through hole it on, i.e. intake antrum, and its top is provided with water inlet pipe.Preferably bobbin carriage flexibly connects with holding tube sheet, end tube sheet and sagging plate, sagging plate and housing, so that tube bank maintenance and replacing.Be provided with deflection plate in addition in the flue gas chamber, this deflection plate is helical baffles preferably, and it can force the flue gas helical flow, removes the finned tube superficial dust effectively.
Should prevent that flue gas cold end corrosion helical baffles bushing type economizer was when work, cold water enters in the water service pipe from bobbin carriage, end from water service pipe enters between water service pipe and the sleeve pipe again, the absorption sleeve pipe heats water from the heat of fume side transmission, sleeve pipe absorb from fume side heat with the water heating in, heated water is delivered to a part of heat in the water service pipe by the water flowing tube wall, again the cold water in the water service pipe is heated.Flue gas enters from the housing gas approach, is undertaken behind the high efficient heat exchanging the water in the heat transferred sleeve pipe by the deflection plate water conservancy diversion in the housing, and discharge from the housing exhanst gas outlet heat release cooling back.
The utility model compared with prior art has following advantage:
1, the utility model is designed to the bushing type finned tube with finned tube, cold water does not directly contact with sleeve pipe, so just improves the water temperature of economizer, and then improves the temperature of finned tube tube wall, solved the cold end corrosion problem of economizer, the service life of having improved economizer.
2, bobbin carriage, housing adopt to live in being connected with tube sheet and are convenient to tube bank maintenance and replacing.
3, the helical baffles in the housing can make the flue gas helical flow, can clean fin superficial dust on the finned tube effectively, improves heat exchange efficiency.
4, the flue gas chamber is a cylindrical shell, is fit to the waste heat recovery of band elevated pressures gas.
5, 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.
Fig. 2 is that direction of flow of the present utility model amplifies simplified schematic diagram.
The specific embodiment: in the simplified schematic diagram of anti-flue gas cold end corrosion helical baffles bushing type economizer illustrated in figures 1 and 2, finned tube 1 is the straight tube of peripheral hardware H type fin, this finned tube one end sealing also places in gripper shoe 2 through hole corresponding with it, the finned tube other end is an opening, it is located in sagging plate 3 through hole corresponding with it, and this openend and finned tube main body lay respectively at the both sides of sagging plate.In above-mentioned finned tube, be inserted with the water service pipe 4 of external diameter less than its internal diameter, both forming sleeves, the nearly finned tube blind end of this water service pipe one termination, the other end passes the gap between sagging plate and the end tube sheet, the end is located in end tube sheet 5 through hole corresponding with it, and this side opening of water service pipe and water service pipe main body lay respectively at the both sides of end tube sheet.Above-mentioned finned tube has some, and they form the sleeve pipe tube bank.Be provided with the housing 6 that they are contained and seal in this finned-tube bundle outside, this housing is the cylindrical shell that the end sealing other end links to each other with sagging plate, this housing and sagging plate connect and compose the flue gas chamber, establish flue gas inlet tube 7 on the housing top in this flue gas chamber, and smoke outlet tube 8 is established in the bottom.Sagging plate and end also are provided with between the tube sheet and the water service pipe in it are contained and the housing 9 of sealing, i.e. water chamber, and the housing below it is provided with outlet pipe 10.End tube sheet outside is provided with contains also coupled bobbin carriage 11 with through hole it on, i.e. intake antrum, and its top is provided with water inlet pipe 12.Above-mentioned bobbin carriage flexibly connects with end tube sheet, end tube sheet and sagging plate, sagging plate and housing.Be provided with polylith deflection plate 13 in addition in the flue gas chamber, this deflection plate is a helical baffles.
Claims (6)
1. anti-flue gas cold end corrosion helical baffles bushing type economizer, it is characterized in that: finned tube is the straight tube of peripheral hardware fin, this finned tube one end sealing also places in the gripper shoe through hole corresponding with it, the finned tube other end is an opening, it is located in the sagging plate through hole corresponding with it, in above-mentioned finned tube, be inserted with the water service pipe of external diameter less than its internal diameter, the nearly finned tube blind end of this water service pipe one termination, the other end passes the gap between sagging plate and the end tube sheet, the end is located in the end tube sheet through hole corresponding with it, be provided with the housing that they are contained and seal in this finned-tube bundle outside, this housing and sagging plate connect and compose the flue gas chamber, flue gas inlet tube is established on housing top in this flue gas chamber, smoke outlet tube is established in the bottom, also is provided with the housing that the water service pipe in it is contained and seals between sagging plate and the end tube sheet, and the housing below it is provided with outlet pipe, end tube sheet outside is provided with contains through hole on it and coupled bobbin carriage, and its top is provided with water inlet pipe.
2. anti-flue gas cold end corrosion helical baffles bushing type economizer according to claim 1 is characterized in that: be provided with deflection plate in the flue gas chamber.
3. anti-flue gas cold end corrosion helical baffles bushing type economizer according to claim 1 and 2 is characterized in that: bobbin carriage flexibly connects with end tube sheet, end tube sheet and sagging plate, sagging plate and housing.
4. anti-flue gas cold end corrosion helical baffles bushing type economizer according to claim 3 is characterized in that: the flue gas cavity shell is the cylindrical shell that the end sealing other end links to each other with sagging plate.
5. anti-flue gas cold end corrosion helical baffles bushing type economizer according to claim 4, it is characterized in that: this deflection plate is a helical baffles.
6. anti-flue gas cold end corrosion helical baffles bushing type economizer according to claim 5 is characterized in that: the fin of finned tube adopts H type fin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206076957U CN201866752U (en) | 2010-11-11 | 2010-11-11 | Helical baffle sleeve type coal economizer for preventing flue gas low temperature corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206076957U CN201866752U (en) | 2010-11-11 | 2010-11-11 | Helical baffle sleeve type coal economizer for preventing flue gas low temperature corrosion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201866752U true CN201866752U (en) | 2011-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206076957U Expired - Fee Related CN201866752U (en) | 2010-11-11 | 2010-11-11 | Helical baffle sleeve type coal economizer for preventing flue gas low temperature corrosion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201866752U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413428A (en) * | 2018-03-30 | 2018-08-17 | 青岛达能环保设备股份有限公司 | Gas-liquid-solid coalescence absorbs the flue gas deep cooler for inhibiting low-temperature corrosion |
-
2010
- 2010-11-11 CN CN2010206076957U patent/CN201866752U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413428A (en) * | 2018-03-30 | 2018-08-17 | 青岛达能环保设备股份有限公司 | Gas-liquid-solid coalescence absorbs the flue gas deep cooler for inhibiting low-temperature corrosion |
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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: 20111111 |