Method and system for matching air supply volume and exhaust air volume under variable air volume conditions

Abstract

The invention provides a method and a system for realizing the matching of the air supply volume of the air supply center in the factory area and the variable air volume working condition of the exhaust air. The method includes: 1) installing a constant air volume valve on the air supply pipe of the first area that requires a stable air volume under various working conditions, so as to ensure the stability of the air volume in the first area when the air volume in other areas changes; 2) Install a variable air volume valve on the air supply pipe of the second area where the exhaust air volume needs to be changed under special working conditions, so as to achieve the same air supply volume and exhaust air volume in the second area by adjusting the air supply volume of the second area. match. The present invention installs a constant air volume valve on the air supply pipe in the first area where the air volume is required to be constant during the operation of each plant, thereby ensuring the stability of the air supply volume in the first area when the air volume in other areas changes; The air volume of the second area needs to be increased due to maintenance or other accidents. A variable air volume valve is installed on the air supply pipe of the second area to adjust the air supply volume of the second area, so as to match the air supply volume and exhaust air volume of the second area.

Description

technical field [0001] The invention relates to the technical field of factory area ventilation, in particular to a method for realizing the matching of the air supply volume of the air supply center of the factory area and the variable air volume of the exhaust air, and a method for realizing the working condition of the air supply volume of the air supply center of the factory area and the variable air volume of the exhaust air matching system. Background technique [0002] Spent fuel reprocessing is the most critical link in the latter part of the nuclear fuel cycle, and it is the most promising treatment method for spent fuel discharged from nuclear reactors. [0003] Each building of the spent fuel reprocessing plant is divided into red zone, orange zone, green zone and white zone according to the level of radiation pollution, and a certain pressure gradient is formed between each zone under the action of the ventilation system. Among them, the air volume in the white ...

AI Technical Summary

Problems solved by technology

[0004] In the current design, for the fire condition of the factory building, measures are taken to install an electric fire damper in the main air inlet pipe of the factory building to close the air intake of the factory building in case of fire. However, the air supply center has no corresponding information receiving and adjustment measures, resulting in The central fan still operates at a fixed frequency, which often results in an increase in the air supply volume of the factory building that has not occurred fire and a decrease in the negative pressure of the factory building during the fire

For the inspection and maintenance working conditions of the factory building, after the inspection fan is turned on, the exhaust air volume in the red zone increases. However, there is no corresponding information reception and adjustment measures in the air supply center, so the fan in the air supply center still operates at a fixed frequency, and the air volume sent to the inspection workshop It is basically stable. At the same time, due to the lack of negative pressure automatic adjustment means between the various areas of the maintenance workshop, this will cause the negative pressure gradient of the maintenance workshop to increase during the maintenance period, the negative pressure value deviates from the standard value, and it is difficult to open the access doors between the districts.

Therefore, the existing technology has the problem of mismatching air supply and exhaust in fire conditions and maintenance conditions, resulting in the destruction of the negative pressure gradient in the plant

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