CN201163156Y - Combined high temperature air preheater - Google Patents
Combined high temperature air preheater Download PDFInfo
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- CN201163156Y CN201163156Y CNU200720041212XU CN200720041212U CN201163156Y CN 201163156 Y CN201163156 Y CN 201163156Y CN U200720041212X U CNU200720041212X U CN U200720041212XU CN 200720041212 U CN200720041212 U CN 200720041212U CN 201163156 Y CN201163156 Y CN 201163156Y
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- heat transfer
- convection
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- transfer
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Abstract
The utility model relates to a combined type high-temperature air preheater, and belongs to a heat exchange device. The combined type high-temperature air preheater consists of a radiation heat transfer section and a convection heat transfer section; a fume inlet is arranged on the front end surface of the radiation heat transfer section; a fume outlet is arranged on the rear end surface of the convection heat transfer section; a cold air inlet is arranged on the sidewall of the convection heat transfer section close to the fume outlet; a hot air outlet of the convection heat transfer section is arranged on the sidewall close to the other end of the convection heat transfer section; a high-temperature air outlet is arranged on the sidewall of the radiation heat transfer section close to the fume inlet; an air inlet of the radiation heat transfer section is arranged on the sidewall close to the other end of the radiation heat transfer section; the hot air outlet of the convection heat transfer section is connected with an air inlet pipeline of the radiation heat transfer section; the combined type high-temperature air preheater utilizes the heat transfer principle of fume in different temperature stages, combines the radiation heat transfer and the convection heat transfer into a whole, fully recycles the heat energy of fume, solves the problems that the welding between the pipeline and a tube plate is ripped under high temperature difference by heat stress caused by thermal expansion and cold contraction; and the combined type high-temperature air preheater has a simple structure, easy manufacturing, energy conservation and long service life.
Description
Technical field
The utility model belongs to heat-exchanger rig, relates to a kind of a kind of high-temperature air preheater that utilizes the heat radiation principle design.
Background technology
Utilize flue gas to add the technology of hot-air, obtained very big development through years of researches, various forms of air preheaters have appearred, as heat pipe preheater, the shell and tube air preheater, rotary regenerative air preheater, fin tube type air preheater and plate air preheater etc., these preheaters all are to make full use of flue gas heat to have made very big contribution, but can be seldom with the equipment more than the air preheat to 700 ℃, this mainly is that above equipment is difficult to solve because being welded under the high temperature difference owing to the phenomenon that occurs drawing crack with upper stress of pipeline and tube sheet usually appears in the thermal stress issues of expanding with heat and contract with cold and causing.Its secondary device design utilizes the equipment of heat radiation principle design almost not have basically based on the principle of convection heat transfer' heat-transfer by convection.
Summary of the invention
The utility model is just in order to overcome above-mentioned deficiency, a kind of combined high-temperature air preheater is provided, can utilize and be higher than 1200 ℃ flue gas indirect air, fully reclaim flue gas heat energy, main innovation is to utilize flue gas at the heat transfer theory in different temperatures stage, is heat radiation bringing-up section and two parts of Convective Heating section with the air heat partial design.Specifically implement like this: a kind of combined high-temperature air preheater, it is characterized in that preheater is made up of radiant heat transfer section and convection heat transfer' heat-transfer by convection section, be equipped with gas approach on the radiant heat transfer section front end face, be equipped with exhanst gas outlet on the convection heat transfer' heat-transfer by convection section rear end face, be equipped with inlet of cold air near on the convection heat transfer' heat-transfer by convection section sidewall of exhanst gas outlet, be equipped with the convection section hot air outlet near on the sidewall of the convection heat transfer' heat-transfer by convection section other end, near being equipped with the high temperature air outlet on the radiant heat transfer section sidewall of gas approach, be equipped with the radiant section air intlet near on the sidewall of the radiant heat transfer section other end, convection section hot air outlet and radiant section air intlet pipeline join.When flue gas more than 700 ℃ the time, based on the heat radiation heat transfer, and thermal-radiating heat-transfer intensity is far longer than the intensity of convection heat transfer' heat-transfer by convection, can utilize heat transfer area seldom, transmit a large amount of heats, the heat radiation heat exchanging segment is exactly to utilize high-temperature flue gas radiant heat transfer principle to design the heat-transfer equipment of this heat transfer segment.
Radiant heat transfer section of the present invention is the heat exchanger tube structure, constitute by central exhaust gases passes and peripheral hot-air runner thereof, the used for expansion joint that is equipped with ripple struction on central authorities' exhaust gases passes barrel is to absorb thermal expansion, and it is insoluble because the pipe that thermal stress causes and the thermal stress drawing crack problem of plate to have solved tube-sheet heat exchanger; Also be equipped with the water conservancy diversion plumage in central authorities' exhaust gases passes, strengthen the disturbance of the fluid of hot-air, augmentation of heat transfer reduces the air-flow short circuit.In order to prevent that heat runs off, and is equipped with the insulated pouring material between radiant heat transfer section hot-air runner barrel and heat exchanger tube shell.This heat transfer segment not only can reduce flue-gas temperature significantly, has also significantly reduced the requirement to the heat transmission equipment of convection section, is the equipment that convection section can adopt various heat-transmission structures.
After flue-gas temperature was lower than 700 ℃, conducting heat by the heat radiation heat transfer was main changing into based on convection heat transfer' heat-transfer by convection, and the utility model convection heat transfer' heat-transfer by convection section can adopt the structure of plate type heat exchanger structure, finned tube exchanger structure, tubular heat exchanger structure and heat exchange of heat pipe.Especially two-sided strengthened plate type heat exchanger, owing to have higher film coefficient of heat transfer, steel using amount is few, volume brief biography, thermal efficiency advantages of higher, under the condition of inferior high temperature, compares with other heat exchanger, can save nearly 50% investment.Convection heat transfer' heat-transfer by convection equipment can drop to 700 ℃ flue-gas temperature always and be lower than below 150 ℃, fully reclaims the heat of flue gas, reaches energy-conservation effect.
The utility model utilizes the heat transfer theory of flue gas in the different temperatures stage, radiation heat transfer and heat convection is combined integrated, fully reclaimed the heat of flue gas, and solved the thermal stress that causes because of expanding with heat and contract with cold and cause pipeline and tube sheet to be welded on the problem of drawing crack under the high temperature difference, this heat-transfer equipment is simple in structure, easy to manufacture, energy-conservation, long service life.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
The specific embodiment
Embodiment 1, a kind of combined high-temperature air preheater, preheater is made up of radiant heat transfer section 1 and convection heat transfer' heat-transfer by convection section 2, radiant heat transfer section 1 is the heat exchanger tube structure, constitute by central exhaust gases passes 13 and peripheral hot-air runner 10 thereof, be equipped with expansion joint 6 on exhaust gases passes 13 barrels, also be equipped with water conservancy diversion plumage 7 in the exhaust gases passes 13, radiant heat transfer section 1 hot-air runner, 10 barrels and 8 on heat exchanger tube shell are equipped with insulated pouring material 9; Convection heat transfer' heat-transfer by convection section 2 can adopt plate type heat exchanger structure or finned tube exchanger structure or tubular heat exchanger structure or heat exchange of heat pipe structure; Be equipped with gas approach 3 on radiant heat transfer section 1 front end face, be equipped with exhanst gas outlet 14 on convection heat transfer' heat-transfer by convection section 2 rear end faces, be equipped with inlet of cold air 12 near on convection heat transfer' heat-transfer by convection section 2 sidewalls of exhanst gas outlet 14, be equipped with convection section hot air outlet 11 near on the sidewall of convection heat transfer' heat-transfer by convection section 2 other ends, near being equipped with high temperature air outlet 4 on radiant heat transfer section 1 sidewall of gas approach 3, be equipped with radiant section air intlet 5 near on the sidewall of radiant heat transfer section 1 other end, convection section hot air outlet 11 joins with radiant section air intlet 5 pipelines.
Cold air enters heat exchanger from inlet of cold air 12, in convection heat transfer' heat-transfer by convection section 2, utilize convection heat transfer' heat-transfer by convection principle air to be heated to more than 600 ℃, enter into radiant heat transfer section 1 again, continue to utilize heat radiation heat transfer theory air to continue to be heated to more than 800 ℃, supply with the user; Flue gas more than 1200 ℃ enters air heater from gas approach 3, is cooled to about 850 ℃ at radiant section and enters into convection section, after continuation is lower than 150 ℃ by the air cooling, and device for transferring.
Claims (8)
1. combined high-temperature air preheater, it is characterized in that preheater is made up of radiant heat transfer section and convection heat transfer' heat-transfer by convection section, be equipped with gas approach on the radiant heat transfer section front end face, be equipped with exhanst gas outlet on the convection heat transfer' heat-transfer by convection section rear end face, be equipped with inlet of cold air near on the convection heat transfer' heat-transfer by convection section sidewall of exhanst gas outlet, be equipped with the convection section hot air outlet near on the sidewall of the convection heat transfer' heat-transfer by convection section other end, near being equipped with the high temperature air outlet on the radiant heat transfer section sidewall of gas approach, be equipped with the radiant section air intlet near on the sidewall of the radiant heat transfer section other end, convection section hot air outlet and radiant section air intlet pipeline join.
2. combined high-temperature air preheater according to claim 1 is characterized in that the radiant heat transfer section is the heat exchanger tube structure, is made of central exhaust gases passes and peripheral hot-air runner thereof.
3. combined high-temperature air preheater according to claim 2 is characterized in that being equipped with expansion joint on the central exhaust gases passes barrel.
4. combined high-temperature air preheater according to claim 3 is characterized in that the expansion joint of ripple struction.
5. according to claim 2,3, one of 4 described combined high-temperature air preheaters, it is characterized in that central exhaust gases passes is built-in with the water conservancy diversion plumage.
6. combined high-temperature air preheater according to claim 2 is characterized in that being equipped with the insulated pouring material between radiant heat transfer section hot-air runner barrel and heat exchanger tube shell.
7. combined high-temperature air preheater according to claim 1 is characterized in that the convection heat transfer' heat-transfer by convection section adopts plate type heat exchanger structure or finned tube exchanger structure or tubular heat exchanger structure or heat exchange of heat pipe structure.
8. combined high-temperature air preheater according to claim 7 is characterized in that the convection heat transfer' heat-transfer by convection section adopts two-sided plate type heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720041212XU CN201163156Y (en) | 2007-08-01 | 2007-08-01 | Combined high temperature air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720041212XU CN201163156Y (en) | 2007-08-01 | 2007-08-01 | Combined high temperature air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201163156Y true CN201163156Y (en) | 2008-12-10 |
Family
ID=40184091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720041212XU Expired - Lifetime CN201163156Y (en) | 2007-08-01 | 2007-08-01 | Combined high temperature air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201163156Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104566957A (en) * | 2014-12-30 | 2015-04-29 | 南京宜热纵联节能科技有限公司 | System device for supplying high-temperature clean hot air |
| CN107906554A (en) * | 2017-10-25 | 2018-04-13 | 营口康辉石化有限公司 | A kind of air preheater flue anti-corrosion method |
-
2007
- 2007-08-01 CN CNU200720041212XU patent/CN201163156Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104566957A (en) * | 2014-12-30 | 2015-04-29 | 南京宜热纵联节能科技有限公司 | System device for supplying high-temperature clean hot air |
| CN104566957B (en) * | 2014-12-30 | 2017-03-29 | 南京宜热纵联节能科技有限公司 | A kind of system and device that high temperature cleaning hot blast is provided |
| CN107906554A (en) * | 2017-10-25 | 2018-04-13 | 营口康辉石化有限公司 | A kind of air preheater flue anti-corrosion method |
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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: 20081210 |
|
| CX01 | Expiry of patent term |