Air preheater, flue gas treatment system using air preheater and flue gas treatment method
Pending Publication Date: 2021-03-26
TIANJIN HUASAIER HEAT TRANSFER EQUIP
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Problems solved by technology
[0011] The object of the present invention is to provide an air preheater with partition self-cleaning function, as well as a flue gas treatment system and a flue gas treatment method using the air preheater, so as to solve the problem of using the rotary type in the existing boiler flue gas treatment system. In the air preheater, there are problems of air leakage, blockage and corrosion, as well as the resulting high exhaust gas temperature, low utilization rate of waste heat of flue gas, low boiler efficiency, large energy consumption and large load of downstream dust removal devices and desulfurization devices question
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[0095] The present invention will now be further described in detail in conjunction with the accompanying drawings, but the following embodiments do not constitute a limitation to the present invention.
[0096] Figures 2-5 show the schematic structural diagrams of the air preheater with partition self-cleaning function provided by the present invention.
[0097] The present invention provides an air preheater with partition self-cleaning function, the air preheater includes 2n heat transfer modules, n≥2, characterized in that:
[0098] In the heat transfer module, a group of opposite sides of two heat transfer plates are welded to form a plate pair, and a plurality of plate pairs are stacked to form a heat transfer module. A cold fluid channel is formed inside the plate pair, and the other pair of opposite sides of the plate pair is not assembled and welded to form the cold fluid inlet of the heat transfer module and the cold fluid outlet of the heat transfer module; The dir...
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The invention relates to an air preheater with a partition self-cleaning function, a flue gas treatment system and a flue gas treatment method. The air preheater is provided with a plurality of heat exchange modules, a cold fluid inlet header of a first set of heat transfer modules is divided into a plurality of sub-headers by cold fluid inlet partition plates, and a cold fluid inlet cut-off mechanism capable of being independently controlled to be opened is arranged in each sub-header. The self-cleaning function of all the heat transfer modules in an air preheater box body can be achieved bycontrolling opening and closing of the cold fluid inlet cut-off mechanisms in the sub-headers.
Description
technical field [0001] The invention relates to the field of air preheaters, in particular to an air preheater with partition self-cleaning function, a flue gas treatment system and a flue gas treatment method using the air preheater. Background technique [0002] Coal-fired power plant boilers are usually equipped with corresponding waste heat utilization devices and desulfurization and degassing devices during operation to treat the flue gas emitted by the boilers, so as to achieve the purpose of energy saving and emission reduction. [0003] Flue gas treatment systems for conventional coal-fired power plant boilers such as figure 1 As shown, the system includes: boiler 1, coal feeder 2, primary air fan 3, secondary air fan 4, dust removal device 5, induced draft fan 6, desulfurization device 7, chimney 8, denitrification device 9; air preheater 10 And low and low temperature economizer 11. [0004] The air preheater 10 is the core component of the flue gas treatment sys...
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IPC IPC(8): F23L15/04F28F9/02F28F27/02F28F3/08F28F3/02F23J3/00F23J15/00F22D1/36
CPCF22D1/36F23J3/00F23J15/006F23L15/04F28F3/025F28F3/08F28F9/0204F28F27/02Y02E20/34
Inventor 宋秉棠马倩王凯张常玲
Owner TIANJIN HUASAIER HEAT TRANSFER EQUIP