Direct air cooling combined type atomizing back pressure reducing device

A back-pressure device and air-cooling technology, which is applied to steam engine devices, heating methods, air-conditioning systems, etc., can solve problems such as high cost and complex equipment, and achieve the effects of small investment, low water consumption, and reduced back pressure

Pending Publication Date: 2021-04-13
NORTHWEST BRANCH OF CHINA DATANG CORP SCI & TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a direct air-cooling combined spraying back pressure reducing device, which solves the problem of complex equipment and high cost for reducing back pressure in the prior art

Method used

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  • Direct air cooling combined type atomizing back pressure reducing device
  • Direct air cooling combined type atomizing back pressure reducing device

Examples

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Effect test

Embodiment

[0028] Taking a 300MW class direct air-cooled unit as an example to calculate, when the water spray temperature in the exhaust pipe is 35°C, the back pressure is 25kPa, and the ambient temperature is 35°C, the water spray in the exhaust pipe can reduce the back pressure by about 4kPa; Water spraying on the air side of the air-cooled island can reduce the ambient temperature by about 3.5°C. According to the performance curve of the air-cooled island, the back pressure can be reduced by about 4kPa. To sum up, this system can reduce the back pressure of about 8kPa for 300MW air-cooled units, and the effect is very obvious. It can ensure that the unit is fully loaded under the condition of finishing treatment without overheating in summer, which greatly reduces the operating pressure of the power plant. Avoid being assessed by the grid because of insufficient load.

[0029] The present invention relates to a direct air-cooling combined spraying back pressure reducing device, which...

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Abstract

The invention discloses a direct air cooling combined type atomizing back pressure reducing device which comprises a steam turbine. A steam turbine low-pressure cylinder is arranged at the tail of the steam turbine and connected with a steam exhaust device, the steam exhaust device is divided into an upper steam exhaust device body and a lower steam exhaust device body through a separating plate, and the upper steam exhaust device body is connected with an air cooling island through a steam exhaust pipeline. Multiple pipeline atomization nozzles are arranged in the steam exhaust pipeline and connected with a desalted water pump through a pipeline atomization nozzle water supply pipeline, the desalted water pump is connected with a desalted water tank, and the steam exhaust pipeline is connected with the lower steam exhaust device body through a steam exhaust pipeline drain pipe. The direct air cooling combined type atomizing back pressure reducing device is little in equipment, simple in system, low in maintenance cost, low in operation difficulty and small in investment, can make full use of water resources and is suitable for being applied and popularized in direct air cooling power plants.

Description

technical field [0001] The invention belongs to the technical field of thermal power generation, and relates to a direct air-cooling combined spraying back pressure reducing device. Background technique [0002] The proportion of thermal power in the energy ratio is still the first, and the air-cooled unit accounts for more than 20% of the thermal power unit. The advantage of water saving makes it widely built in the arid and water-scarce areas of Northwest my country, becoming the power source for these areas. pillar. Air-cooled units are mainly divided into two categories, direct air-cooled and indirect air-cooled. Both types of air-cooled units will eventually release heat to the air, so the air-cooled units are strongly affected by environmental conditions. Due to the large range of temperature changes throughout the year in the area where the direct air cooling unit is located, the extreme cold in winter and the high temperature in summer, the operating conditions are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D25/30F01K9/00F28B1/06F24F5/00
CPCF01D25/30F01K9/003F24F5/0035F28B1/06
Inventor 文珏曹超郝振张全文赵博宁李豪
Owner NORTHWEST BRANCH OF CHINA DATANG CORP SCI & TECH RES INST
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