CN203223929U - Tail heating surface arrangement structure of pulverized coal boiler - Google Patents
Tail heating surface arrangement structure of pulverized coal boiler Download PDFInfo
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- CN203223929U CN203223929U CN 201320190447 CN201320190447U CN203223929U CN 203223929 U CN203223929 U CN 203223929U CN 201320190447 CN201320190447 CN 201320190447 CN 201320190447 U CN201320190447 U CN 201320190447U CN 203223929 U CN203223929 U CN 203223929U
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- flue
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- pulverized coal
- heating surface
- arrangement structure
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Abstract
The utility model provides a tail heating surface arrangement structure of a pulverized coal boiler. The tail heating surface arrangement structure of the pulverized coal boiler guarantees the height of flue gas denitration reserved flue, does not increase the height of a tail flue, saves the space of the flue, and can prevent low-temperature corrosion on a pre-heater. The tail heating surface arrangement structure of the pulverized coal boiler comprises the tail flue. The tail heating surface arrangement structure of the pulverized coal boiler is characterized in that an upper-level H type economizer, the reserved flue for denitration, an upper-level air pre-heater, a lower-level H type economizer, a lower-level air pre-heater upper portion and a low temperature section horizontal type air pre-heater. The upper-level H type economizer and the lower-level H type economizer are H type finned tube economizers. Tube boxes on the lowest layer of the low temperature section horizontal type air pre-heater are arranged horizontally and sequentially and are enamel tube boxes.
Description
Technical field
The utility model relates to the technical field of pulverized-coal fired boiler structure, is specially a kind of back-end surfaces arrangement of pulverized-coal fired boiler.
Background technology
Along with China's constant development of economy, energy-consuming is more and more, and the environmental pollution that thereupon brings is also more and more serious.Coal is occupied an leading position in China's energy-consuming, and coal fire discharged sulfur dioxide, nitrogen oxide are the main sources that causes the environmental pollution of atmosphere pollution, acid rain.Present stage, the flue gas desulfurization project is implemented on a large scale, but denitrating flue gas is at the early-stage.At present, in the comparatively ripe mainstream technology, arrange that equipment for denitrifying flue gas is to reduce NOX discharging means more effectively in the world.
The back-end ductwork of conventional pulverized-coal boiler is when satisfying heat exchange and requiring, and will reserve to arranging that equipment for denitrifying flue gas is reserved higher flue space again is the comparison difficulty, generally all can only take the measure that flue integral body is raised.Existing structure is seen Fig. 1, it comprises back-end ductwork 1, be furnished with higher level's light pipe economizer 2, higher level's air preheater 3, subordinate's light pipe economizer 4, subordinate air preheater top 5, low-temperature zone vertical air preheater 6 in the back-end ductwork 1 from top to bottom, simultaneously, the ammonium hydrogen sulfate that forms after the boiler tail flue gas denitration corrodes pipe after the zone of low-temperature zone vertical air preheater 6 forms weak acid easily and is stained with the knot ash, thereby forms cold end corrosion.
Summary of the invention
At the problems referred to above, the utility model provides a kind of back-end surfaces arrangement of pulverized-coal fired boiler, and it guarantees the height of denitrating flue gas reservation flue, and the while does not increase the height of back-end ductwork, save the flue space, can prevent the cold end corrosion to preheater simultaneously.
A kind of back-end surfaces arrangement of pulverized-coal fired boiler, its technical scheme is such: it comprises back-end ductwork, it is characterized in that: described back-end ductwork is furnished with higher level H type economizer, denitration from top to bottom with reserving flue, higher level's air preheater, the H of subordinate type economizer, subordinate air preheater top, low-temperature zone horizontal air preheater, described higher level H type economizer, the H of subordinate type economizer are H type ribbed pipe type economizer, and the orlop bobbin carriage of described low-temperature zone horizontal air preheater is that horizontal suitable row are arranged and the orlop bobbin carriage is the bobbin carriage of enamel pipe.
After adopting structure of the present utility model, the heat exchange efficiency of H type ribbed pipe type economizer is much higher than light pipe formula economizer, can reduce the economizer hand about 50%, vertical pipe row number of economizer is greatly reduced, can reach the effect in good saving flue space, and because the orlop bobbin carriage of subordinate's air preheater is horizontal along the row layout, material adopts enamel pipe, it can prevent the corrosion to preheater cold end corrosion and ammonium salt, and prevent from stopping up, guaranteed the height of denitrating flue gas reservation flue, do not increase simultaneously the height of back-end ductwork, saved the flue space.
Description of drawings
Fig. 1 is the back-end surfaces arrangement schematic diagram of existing pulverized-coal fired boiler;
Fig. 2 is front view structural representation of the present utility model.
The specific embodiment
See Fig. 2, it comprises back-end ductwork 1, back-end ductwork 1 is furnished with higher level H type economizer 2, denitration from top to bottom with reserving flue 3, higher level's air preheater 4, the H of subordinate type economizer 5, subordinate air preheater top 6, low-temperature zone horizontal air preheater 7, higher level H type economizer 2, the H of subordinate type economizer 5 are H type ribbed pipe type economizer, and the orlop bobbin carriage of low-temperature zone horizontal air preheater 7 is that horizontal suitable row are arranged and the orlop bobbin carriage is the bobbin carriage of enamel pipe.
Claims (1)
1. the back-end surfaces arrangement of a pulverized-coal fired boiler, it comprises back-end ductwork, it is characterized in that: described back-end ductwork is furnished with higher level H type economizer, denitration from top to bottom with reserving flue, higher level's air preheater, the H of subordinate type economizer, subordinate air preheater top, low-temperature zone horizontal air preheater, described higher level H type economizer, the H of subordinate type economizer are H type ribbed pipe type economizer, and the orlop bobbin carriage of described low-temperature zone horizontal air preheater is that horizontal suitable row are arranged and the orlop bobbin carriage is the bobbin carriage of enamel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320190447 CN203223929U (en) | 2013-04-16 | 2013-04-16 | Tail heating surface arrangement structure of pulverized coal boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320190447 CN203223929U (en) | 2013-04-16 | 2013-04-16 | Tail heating surface arrangement structure of pulverized coal boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203223929U true CN203223929U (en) | 2013-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320190447 Expired - Lifetime CN203223929U (en) | 2013-04-16 | 2013-04-16 | Tail heating surface arrangement structure of pulverized coal boiler |
Country Status (1)
| Country | Link |
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| CN (1) | CN203223929U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206715A (en) * | 2013-04-16 | 2013-07-17 | 无锡华光锅炉股份有限公司 | Tail heated surface arrangement structure of pulverized coal fired boiler |
-
2013
- 2013-04-16 CN CN 201320190447 patent/CN203223929U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206715A (en) * | 2013-04-16 | 2013-07-17 | 无锡华光锅炉股份有限公司 | Tail heated surface arrangement structure of pulverized coal fired boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 214028 No. 3 Chengnan Road, new Wu District, Jiangsu, Wuxi Patentee after: Wuxi Huaguang Environmental Protection Energy Group Co.,Ltd. Address before: 214028 No. 3 Chengnan Road, New District, Jiangsu, Wuxi Patentee before: WUXI HUAGUANG BOILER Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131002 |