CN214198623U - Novel structure for improving convective heat transfer capability of economizer - Google Patents
Novel structure for improving convective heat transfer capability of economizer Download PDFInfo
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- CN214198623U CN214198623U CN202023188546.4U CN202023188546U CN214198623U CN 214198623 U CN214198623 U CN 214198623U CN 202023188546 U CN202023188546 U CN 202023188546U CN 214198623 U CN214198623 U CN 214198623U
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Abstract
The utility model relates to an improve economizer convection heat transfer ability's novel structure. At present, the national energy conservation and emission reduction is strong, the standard is more strict, full-load denitration becomes the most basic capability of a unit, especially along with the requirement of deep peak shaving of the current power grid, the domestic unit faces frequent load lifting at present, and meanwhile, the time of the unit running at low load is obviously prolonged. A novel structure for improving the convection heat exchange capability of an economizer comprises the following components: the system comprises a primary economizer inlet collection box (1), a secondary economizer inlet collection box (5), a primary economizer outlet collection box (3) and a secondary economizer outlet collection box (7), wherein the primary economizer inlet collection box is connected with a primary economizer tube panel (2), the primary economizer tube panel is connected with the primary economizer outlet collection box, and the primary economizer outlet collection box is connected with one end of a primary and secondary economizer collection box connecting pipe (4). The utility model discloses be applied to the boiler field.
Description
Technical Field
The utility model relates to an improve economizer convection heat transfer ability's novel structure.
Background
At present, in order to meet the stricter environmental protection index requirements, a denitration device has become the most basic capability of a boiler when the boiler is in full load, and meanwhile, the technology of ensuring that the denitration device can be put in low load by adopting an economizer grading scheme has been more and more applied to engineering.
Disclosure of Invention
The utility model aims at providing an improve economizer convection heat transfer ability's novel structure.
The above purpose is realized by the following technical scheme:
a novel structure for improving the convection heat exchange capability of an economizer comprises the following components: the system comprises a primary economizer inlet collection box, a secondary economizer inlet collection box, a primary economizer outlet collection box and a secondary economizer outlet collection box, wherein the primary economizer inlet collection box is connected with a primary economizer tube panel, the primary economizer tube panel is connected with the primary economizer outlet collection box, the primary economizer outlet collection box is connected with one end of a primary economizer and secondary economizer collection box connecting pipe, the other end of the primary economizer and secondary economizer collection box connecting pipe is connected with the secondary economizer inlet collection box, the secondary economizer inlet collection box is connected with the secondary economizer tube panel, the secondary economizer tube panel is connected with the secondary economizer outlet collection box, and the secondary economizer outlet collection box is connected with a secondary economizer outlet descending pipe.
The novel structure for improving the convective heat transfer capability of the economizer is characterized in that a primary economizer system is formed by a primary economizer inlet header, a primary economizer tube panel, a primary economizer outlet header and a primary and secondary economizer header connecting pipe.
The novel structure for improving the convective heat transfer capability of the economizer is characterized in that a second-stage economizer system is formed by a second-stage economizer inlet header, a second-stage economizer tube panel, a second-stage economizer outlet header and a second-stage economizer outlet header descending tube.
The novel structure for improving the convective heat transfer capability of the economizer is characterized in that the primary economizer system is a graded economizer system arranged in a denitration outlet flue, can adopt a light pipe or fin pipe type, and further comprises a related connecting pipeline and a header.
The novel structure for improving the convective heat transfer capability of the economizer is characterized in that the secondary economizer system is an economizer system on the upper part of the hearth, can adopt a light tube or fin tube type, and further comprises a related connecting pipeline and a header.
The utility model has the advantages that:
1. the utility model discloses can improve the heat transfer ability of economizer heating surface, reduce the resistance of economizer system and reduce the pressure head of feed pump, finally practice thrift the station service power consumption rate of power plant.
The utility model discloses can improve heat transfer ability, economizer system resistance reduces 0.08MPa, practices thrift the station service power consumption 0.5%.
The utility model discloses feedwater flows in from one-level economizer entry collection case, and the flue gas carries out the heat transfer after one-level economizer and denitration, flows from one-level economizer export collection case, flows in second grade economizer entry collection case through one-level and second grade economizer connecting pipe, gets into second grade economizer and furnace flue gas afterwards and carries out the heat transfer, flows to export collection case downtake from second grade economizer export collection case after the heat transfer to entry smoke temperature before guaranteeing the denitrification facility.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
The system comprises a primary economizer inlet collection box, a primary economizer tube panel, a primary economizer outlet collection box, a primary economizer and secondary economizer collection box connecting pipe, a secondary economizer inlet collection box, a secondary economizer tube panel, a secondary economizer outlet collection box, a secondary economizer outlet downcomer and a primary economizer inlet collection box, wherein the primary economizer and secondary economizer collection box connecting pipe is connected with the primary economizer and secondary economizer inlet collection box, the secondary economizer tube panel is connected with the secondary economizer inlet collection box, and the secondary economizer outlet downcomer is connected with the secondary economizer inlet collection box through the secondary economizer tube panel.
The specific implementation mode is as follows:
example 1:
a novel structure for improving the convection heat exchange capability of an economizer comprises the following components: the system comprises a primary economizer inlet collection box 1, a secondary economizer inlet collection box 5, a primary economizer outlet collection box 3 and a secondary economizer outlet collection box 7, wherein the primary economizer inlet collection box is connected with a primary economizer tube panel 2, the primary economizer tube panel is connected with the primary economizer outlet collection box, the primary economizer outlet collection box is connected with one end of a primary economizer and secondary economizer collection box connecting pipe 4, the other end of the primary economizer and secondary economizer collection box connecting pipe is connected with the secondary economizer inlet collection box, the secondary economizer inlet collection box is connected with a secondary economizer tube panel 6, the secondary economizer tube panel is connected with the secondary economizer outlet collection box 7, and the secondary economizer outlet collection box is connected with a secondary economizer outlet descending pipe 8.
Example 2:
according to the novel structure for improving the convective heat transfer capability of the economizer in the embodiment 1, the primary economizer inlet header, the primary economizer tube panel, the primary economizer outlet header and the primary and secondary economizer header connecting pipes form a primary economizer system.
Example 3:
according to the novel structure for improving the convective heat transfer capability of the economizer in the embodiment 1 or 2, the secondary economizer system is formed by the secondary economizer inlet header, the secondary economizer tube panel, the secondary economizer outlet header and the secondary economizer outlet header downcomer.
Example 4:
according to the novel structure for improving the convective heat transfer capability of the economizer in the embodiment 1, 2 or 3, the primary economizer system is a graded economizer system arranged in a denitration outlet flue, and can adopt a light pipe or fin pipe type, and the primary economizer system further comprises a related connecting pipeline and a header.
Example 5:
according to the novel structure for improving the convective heat transfer capability of the economizer in the embodiment 1, 2, 3 or 4, the secondary economizer system is an upper economizer system of a furnace chamber, and can adopt a light pipe or a finned pipe type, and the secondary economizer system further comprises a related connecting pipeline and a header.
Example 6:
the one-level economizer system in arrange on the flue of denitration (SCR) device export, include: the system comprises a primary economizer inlet header, a primary economizer tube panel, a primary economizer outlet header and a primary and secondary economizer header connecting pipe.
The second grade economizer system arrange in the shaft around the furnace afterbody flue, include: the system comprises a secondary economizer inlet header, a secondary economizer tube panel, a secondary economizer outlet header and a secondary economizer outlet header downcomer.
Claims (5)
1. A novel structure for improving the convection heat exchange capability of an economizer comprises the following components: one-level economizer entry collection case, second grade economizer entry collection case, one-level economizer export collection case and second grade economizer export collection case, characterized by: the one-level economizer entry collection case be connected with one-level economizer tube panel, one-level economizer tube panel with one-level economizer export collection case connect, one-level economizer export collection case be connected with one-level and second grade economizer collection case connecting pipe one end, one-level and second grade economizer collection case connecting pipe other end be connected with second grade economizer entry collection case, second grade economizer entry collection case be connected with second grade economizer tube panel, second grade economizer tube panel be connected with second grade economizer exit collection case, second grade economizer exit collection case be connected with second grade economizer exit downcomer.
2. The new structure for improving the convective heat transfer capability of the economizer according to claim 1, wherein: the primary economizer system is composed of a primary economizer inlet header, a primary economizer tube panel, a primary economizer outlet header and a primary and secondary economizer header connecting pipe.
3. The new structure for improving the convective heat transfer capability of the economizer as claimed in claim 2, wherein: and the secondary economizer system is composed of a secondary economizer inlet header, a secondary economizer tube panel, a secondary economizer outlet header and a secondary economizer outlet header descending pipe.
4. The novel structure for improving the convective heat transfer capability of an economizer according to claim 3, wherein: the primary economizer system is a graded economizer system arranged in a denitration outlet flue, can adopt a light pipe or finned pipe type, and comprises a related connecting pipeline and a header.
5. The novel structure for improving the convective heat transfer capability of an economizer according to claim 4, wherein: the secondary economizer system is an economizer system on the upper part of the hearth, can adopt a light pipe or a finned pipe type, and comprises a related connecting pipeline and a header.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202023188546.4U CN214198623U (en) | 2020-12-26 | 2020-12-26 | Novel structure for improving convective heat transfer capability of economizer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023188546.4U CN214198623U (en) | 2020-12-26 | 2020-12-26 | Novel structure for improving convective heat transfer capability of economizer |
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| CN214198623U true CN214198623U (en) | 2021-09-14 |
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