Crown-shaped cooling air deflector of direct air cooling unit
A technology of cooling air and deflectors, applied in lighting and heating equipment, heat exchange equipment, heat exchanger shells, etc., can solve the problem of insufficient use of heat transfer area, large difference in heat load, air-cooled condenser tube bundles, etc. Problems such as uneven flow velocity in the flow channel can achieve the effects of improving safety and economy, reducing back pressure, and improving heat transfer characteristics
Inactive Publication Date: 2012-07-04
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology
[0004] The purpose of the present invention is to solve the uneven flow velocity between the flow channels of the tube bundles of the air-cooled condenser caused by the special "A" frame structure of the air-cooling unit and the complex air flow field at the outlet of the air-cooled axial flow fan, and the heat load difference in different tube bundle areas is large, and the transmission Due to the shortcomings of insufficient utilization of the thermal area, a canopy-shaped cooling air guide device for direct air cooling units is proposed
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[0013] The invention proposes a canopy-shaped cooling air guiding device for a direct air cooling unit. The present invention will be described below in conjunction with the accompanying drawings.
[0014] exist figure 1 In the structure schematic diagram of the "A" type frame of the direct air-cooling unit shown in the longitudinal plane cooling air canopy-shaped flow guide device, the canopy-shaped channel is arranged in the △-shaped channel space between the outlet of the air-cooling fan 5 and the steam distribution pipe 1 and the air-cooled finned tube bundle 2. Cooling air guide.
[0015] The canopy-shaped cooling air guide device is composed of a main support structure 3 located on the upper part of the central hub of the air-cooling fan 5 and a branch deflector 4 welded and fixed on the main support structure 3 . The backbone support structure 3 is a hollow cylinder with a height of 4-6m and a diameter of 1.5-2m, which plays a role of support and fixation. The branch...
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The invention discloses a crown-shaped cooling air deflector of a direct air cooling unit, belonging to the technical field of cooling in power stations. The deflector is characterized in that the deflector is formed by welding branch deflectors on a main support structure; the deflector is integrally installed in the triangular channel space between finned tube banks of the air cooling unit and an air cooling fan; the branch deflectors are symmetrically distributed at the two sides close to the left and right finned tube banks and are annularly fixed on the central main support structure on the same level; and the branch deflectors incline from the main support structure to the surfaces of the finned tube banks and are vertical to the surfaces of the finned tube banks. The deflector aimsto rearrange the flow fields of the cooling air at the outlet of the air cooling fan so as to ensure the flow velocity of the cooling air between the channels of the tube banks to be more uniform, fully utilize the heat transfer areas of the finned tube banks, improve the performance of the air cooling condenser to a certain extent and improve the safety and economy of air cooling system running.
Description
technical field [0001] The invention belongs to the technical field of power station cooling. In particular, it involves the use of a canopy structure to guide and organize the cooling air of the air-cooled condenser unit of the power station air-cooling system, so as to reduce the inhomogeneity of the cooling air flow rate between the fins of the air-cooling unit tube bundle and improve the uniformity of heat load distribution on the surface of the finned tube bundle. A canopy-shaped cooling air guide device for a direct air-cooling unit to make full use of the heat transfer area of the tube bundle and improve the performance of the air-cooled condenser. Background technique [0002] In order to meet the needs of rapid power growth and solve the contradiction of rich coal and water shortage, direct air cooling technology for power stations has developed rapidly in northern my country. The direct air-cooling system consists of dozens of air-cooling units. The air-cooling ...
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IPC IPC(8): F28F9/22
Inventor 杨立军杜小泽杨勇平
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)