CN203273845U - Flue structure suitable for SCR processing technology - Google Patents
Flue structure suitable for SCR processing technology Download PDFInfo
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- CN203273845U CN203273845U CN 201320272323 CN201320272323U CN203273845U CN 203273845 U CN203273845 U CN 203273845U CN 201320272323 CN201320272323 CN 201320272323 CN 201320272323 U CN201320272323 U CN 201320272323U CN 203273845 U CN203273845 U CN 203273845U
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- economizer
- flue
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- level economizer
- heater
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Abstract
The utility model discloses a flue structure suitable for an SCR processing technology. The flue structure comprises an upper-level economizer, a lower-level economizer and an air pre-heater, wherein the upper-level economizer, the lower-level economizer and the air pre-heater are arranged inside a flue at the tail of a boiler. The upper-level economizer and the air pre-heater are arranged in a cross mode, heat exchanging tubes of the upper-level economizer are arranged in a staggered mode, and the lengthways row number of heating surface pipe arrays is not less than 20. Due to the fact that the upper-level economizer and the air pre-heater are arranged in the cross mode and the heat exchanging tubes of the upper-level economizer are arranged in the staggered mode, heat exchange area of flue gas inside the flue at the tail of the boiler is increased, flowing speed of leading-out and backflow of the flue gas is adjusted, and the parameter requirements of the SCR processing technology are met accordingly.
Description
Technical field
The utility model relates to the boiler technology field, especially relates to a kind of flue structure of the SCR of being applicable to treatment process.
Background technology
In view of the present domestic environmental problem that is on the rise, play a significant role in energy industry and be suitable for the widest HTHP Natural Circulation drum coal-powder boiler, its flue gas that discharges is carried out denitration to be processed extremely urgent, in order to reach the discharging that meets environmental requirement, can adopt SCR(SCR technology) treatment process carries out out of stock processing to boiler smoke, mirror for flue-gas temperature, flue gas due to the SCR treatment process and the flue size that refluxes has specific requirement, therefore need to re-start and arrange and adjust the boiler back end ductwork name of being heated.
The utility model content
In order to overcome above-mentioned existing technological deficiency, the purpose of this utility model be to provide a kind of can satisfy that the SCR treatment process is drawn for flue-gas temperature, flue gas and the dimensional requirement of the flue that refluxes be arranged in the boiler back end ductwork structure.
In order to achieve the above object, the utility model is achieved through the following technical solutions: a kind of flue structure that is applicable to the SCR treatment process, comprise the higher level's economizer, subordinate's economizer and the air preheater that are arranged in boiler back end ductwork, described higher level's economizer and air preheater arranged crosswise, described higher level's coal economizer heat exchanging tube is stagger arrangement and arranges, vertical row of panel-pipe of heating surface is not less than 20, and is communicated with the subordinate economizer by tube connector.By the arranged crosswise of higher level's economizer and air preheater, and the heat exchanger tube of higher level's economizer is and is staggered in arrangement, and increases the heat exchange area of flue gas in back-end ductwork, regulates flue gas and draws and the flowing velocity that refluxes, to satisfy the parameter request of SCR treatment process.
As optimization, the heat exchanger tube transverse pitch of described higher level's economizer is 85mm, and longitudinal pitch is 45mm, further satisfies the control requirement of the interior flue-gas temperature of back-end ductwork and flow velocity; As optimization, the caliber of the heat exchanger tube of described higher level's economizer is φ 32 * 4mm, is conducive to improve the rate of heat exchange of heat exchanger tube and flue gas.
Compared with prior art, the beneficial effects of the utility model have: the utility model is by rearranging adjustment to the economizer in back-end ductwork and preheater, arranged crosswise with higher level's economizer and air preheater, and the heat exchanger tube of higher level's economizer is is staggered in arrangement, to reach the heat exchange area that increases flue gas in back-end ductwork, draw and the flowing velocity that refluxes thereby regulate flue gas, with the purpose of the parameter request that satisfies the SCR treatment process.
Description of drawings
The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the utility model internal structure schematic diagram.
Mark in figure: higher level's economizer 1, subordinate's economizer 2, air preheater 3, tube connector 4.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
as shown in Figure 1, a kind of flue structure that is applicable to the SCR treatment process, comprise the higher level's economizer 1 that is arranged in boiler back end ductwork, subordinate's economizer 2 and air preheater 3, described higher level's economizer 1 and air preheater 3 arranged crosswise, described air preheater 3 is one-stroke, and arrange along the back-end ductwork depth direction, described higher level's economizer 1 heat exchanger tube is stagger arrangement and arranges, vertical row of panel-pipe of heating surface is not less than 20, and be communicated with subordinate economizer 2 by tube connector 4, heat exchanging fluid enters higher level's economizer 1 from subordinate's economizer 2 through tube connector 4, flue gas flows downward from higher level's economizer 1.Flue gas in back-end ductwork contacts with air preheater 3 with higher level's economizer 1 along the flow velocity direction and carries out heat exchange, flue gas is flowing between the heat exchanger tube of higher level's economizer 1 and between the light wall pipe of air preheater 3, by the arranged crosswise of higher level's economizer 1 with air preheater 3, and the heat exchanger tube of higher level's economizer 1 is and is staggered in arrangement, the heat exchange area of flue gas in effective back-end ductwork, improve the rate of heat exchange of flue gas, and regulate flue gas and draw and the flowing velocity that refluxes, to satisfy the parameter request of SCR treatment process.Further optimize on this basis, the heat exchanger tube transverse pitch of described higher level's economizer 1 is 85mm, and longitudinal pitch is 45mm, and its caliber is φ 32 * 4mm, satisfies the requirement that heat exchange tube inner fluid speed and the stream of economizer are pressed.
The above is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (3)
1. flue structure that is applicable to the SCR treatment process, comprise the higher level's economizer (1), subordinate's economizer (2) and the air preheater (3) that are arranged in boiler back end ductwork, it is characterized in that: described higher level's economizer (1) is positioned at above air preheater (3), and with air preheater (3) arranged crosswise, the heat exchanger tube of described higher level's economizer (1) is stagger arrangement and arranges, vertical row of panel-pipe of heating surface is not less than 20, and is communicated with subordinate's economizer (2) by tube connector (4).
2. a kind of flue structure that is applicable to the SCR treatment process according to claim 1, it is characterized in that: the heat exchanger tube transverse pitch of described higher level's economizer (1) is 85mm, longitudinal pitch is 45mm.
3. a kind of flue structure that is applicable to the SCR treatment process according to claim 1, it is characterized in that: the caliber of the heat exchanger tube of described higher level's economizer (1) is φ 32 * 4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320272323 CN203273845U (en) | 2013-05-17 | 2013-05-17 | Flue structure suitable for SCR processing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320272323 CN203273845U (en) | 2013-05-17 | 2013-05-17 | Flue structure suitable for SCR processing technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203273845U true CN203273845U (en) | 2013-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320272323 Expired - Fee Related CN203273845U (en) | 2013-05-17 | 2013-05-17 | Flue structure suitable for SCR processing technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203273845U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106196033A (en) * | 2016-08-31 | 2016-12-07 | 江苏汇能锅炉有限公司 | Circulating fluid-bed coal-burning boiler energy-saving economizer |
| CN106439798A (en) * | 2016-08-31 | 2017-02-22 | 江苏汇能锅炉有限公司 | Coal economizer for circulating fluid bed coal-fired boiler |
-
2013
- 2013-05-17 CN CN 201320272323 patent/CN203273845U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106196033A (en) * | 2016-08-31 | 2016-12-07 | 江苏汇能锅炉有限公司 | Circulating fluid-bed coal-burning boiler energy-saving economizer |
| CN106439798A (en) * | 2016-08-31 | 2017-02-22 | 江苏汇能锅炉有限公司 | Coal economizer for circulating fluid bed coal-fired boiler |
| CN106439798B (en) * | 2016-08-31 | 2018-12-18 | 江苏汇能锅炉有限公司 | Circulating fluid-bed coal-burning boiler economizer |
| CN106196033B (en) * | 2016-08-31 | 2019-04-30 | 江苏汇能锅炉有限公司 | Circulating fluid-bed coal-burning boiler energy-saving economizer |
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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: 20131106 Termination date: 20140517 |