A system, method and storage medium for dealing with crystallization blockage of regulating valves

Abstract

The invention discloses a system, a method and a storage medium for dealing with and regulating valve crystallization blockage. The system includes a control module for outputting a valve opening signal and a valve closing trigger signal according to a set cycle; a valve controller for The valve opening signal adjusts the valve to the opening indicated by the valve opening signal, and when the valve closing trigger signal is received, the valve is controlled to close, and after the valve closing trigger signal disappears or after receiving the valve closing trigger signal After the set time of the signal, the opening of the valve is adjusted again according to the current valve opening signal; the control module is connected with the valve controller. The invention adopts an automatic control system for crystal processing operation, reduces the risk of manual operation, ensures the stability and continuity of the vaporization production process, and can be widely used in the field of liquid ammonia vaporization.

Description

technical field [0001] The invention relates to the technical field of liquid ammonia vaporization, in particular to a system, method and storage medium for dealing with crystallization blockage of an adjustment valve. Background technique [0002] The denitrification process using the liquid ammonia denitrification process requires a decompression vaporization process from liquid ammonia to ammonia gas, which is generally realized by adjusting the valve, so it is necessary to install a liquid ammonia regulating valve in the process flow. Due to the pressure change caused by adjusting the decompression of the valve, it is easy to form crystals in the internal area of ​​the valve. Due to the honeycomb effect, the crystals will gradually expand, which will affect the control characteristics and flow rate of the valve, thus affecting the control and operation of the system. At present, the general treatment method is to cut off the system and exit the valve for cleaning. Howeve...

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Problems solved by technology

[0002] The denitrification process using the liquid ammonia denitrification process requires a decompression vaporization process from liquid ammonia to ammonia gas, which is generally realized by adjusting the valve, so it is necessary to install a liquid ammonia regulating valve in the process flow. Due to the pressure change caused by adjusting the decompression of the valve, it is easy to form crystals in the internal area of ​​the valve. Due to the honeycomb effect, the crystals will gradually expand, which will affect the control characteristics and flow rate of the valve, thus affecting the control and operation of the system. , the current general treatment method is through the partition system, exit the valve for cleaning treatment, but this method not only increases the maintenance cost, but also affects the operation of the system, because liquid ammonia is a dangerous liquid, which virtually increases the danger of workers

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