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System and method for detecting air leakage rate of flue gas heat exchanger of desulfurization device of thermal power plant

A technology of flue gas heat exchanger and desulfurization device, which can be used in the direction of measuring the acceleration and deceleration rate of fluid, using liquid/vacuum degree for liquid tightness measurement, etc., which can solve problems such as troublesome manual insertion and extraction of hoses

Active Publication Date: 2021-05-28
华新控股(河南)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the above structure, the inventor thinks that it is cumbersome to manually plug and unplug the hose for air leakage rate measurement.

Method used

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  • System and method for detecting air leakage rate of flue gas heat exchanger of desulfurization device of thermal power plant
  • System and method for detecting air leakage rate of flue gas heat exchanger of desulfurization device of thermal power plant

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Effect test

Embodiment 1

[0038] refer to figure 1, this embodiment discloses a detection system for the air leakage rate of a flue gas heat exchanger in a thermal power plant desulfurization device, including a heat exchanger 1, an absorption tower 2 and a chimney 3, the heat exchanger 1 is a rotary flue gas heat exchanger 1, and the heat exchange The device 1 includes a hot air inlet 11, a hot air outlet 12, a cold air inlet 13, and a cold air outlet 14. The hot air inlet 11 is connected to a raw flue gas pipeline 15. The hot air inlet 11 enters the original flue gas with a higher temperature and flows out from the hot air outlet 12. The hot air outlet 12 is connected to the inlet of the absorption tower 2, so that the original flue gas is absorbed in the absorption tower 2, and the outlet of the absorption tower 2 is connected to the cold air inlet 13, so that the purified flue gas in the absorption tower 2 enters the heat exchanger 1, the heat of the original flue gas is transferred to the purified...

Embodiment 2

[0045] refer to figure 2 , this embodiment discloses a detection system for the air leakage rate of the flue gas heat exchanger of a desulfurization device in a thermal power plant. Cooperating with each other, a gas distribution chamber 62 and a pressure regulating chamber 63 are respectively formed on both sides of the piston 68 . A distance measuring sensor 10 is arranged on a side wall of the pressure regulating chamber 63 , and the distance of the piston 68 is measured by the distance measuring sensor 10 , so that the volume of the pressure regulating chamber 63 can be detected. A plurality of extension springs 69 are arranged on the side of the piston 68 located in the pressure regulating chamber 63 , one end of the extension spring 69 is fixed on the piston 68 , and the other end is fixed on the gas distribution box 6 .

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Abstract

The invention relates to a system and a method for detecting the air leakage rate of a flue gas heat exchanger of a desulfurization device of a thermal power plant. The system comprises a heat exchanger and an absorption tower, the heat exchanger comprises a hot air outlet, a cold air inlet and a cold air outlet, the cold air outlet is provided with a first sulfur dioxide concentration sensor, and the outlet of the absorption tower is communicated with the cold air inlet; the hot air outlet is connected with a gas distribution box, the gas distribution box is connected with a second sulfur dioxide concentration sensor, the gas distribution box and the absorption tower are connected to the hot air outlet in parallel, a first electromagnetic valve is arranged between the hot air outlet and the absorption tower, and a second electromagnetic valve is arranged between the hot air outlet and the gas distribution box; and the first electromagnetic valve and the second electromagnetic valve are connected in parallel, a third electromagnetic valve is arranged between the outlet of the absorption tower and the cold air inlet, a fourth electromagnetic valve is arranged between the gas distribution box and the outlet of the absorption tower, and the third electromagnetic valve and the fourth electromagnetic valve are connected in parallel. The system and the method have the effect of conveniently detecting the air leakage rate of the heat exchanger.

Description

technical field [0001] The present application relates to the technical field of detecting the air leakage rate of a heat exchanger, in particular to a detection system and method for the air leakage rate of a flue gas heat exchanger of a desulfurization device in a thermal power plant. Background technique [0002] Heat exchangers are used in thermal power plants to increase the flue gas discharge temperature after desulfurization in thermal power plants, reduce the corrosion of the tail flue and chimney by the acid mist formed by sulfur trioxide below the dew point temperature, and reduce the formation of white smoke plumes. The heat exchanger uses the original flue gas entering the absorption tower to exchange heat with the flue gas after desulfurization and washing. The temperature of the original flue gas is above 130°C; When the temperature rises above 80°C, thermal power plants mostly use rotary flue gas heat exchangers, and the air leakage rate of rotary flue gas hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/26
CPCG01M3/26
Inventor 石砚鹏侯卫国
Owner 华新控股(河南)有限公司
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