Self-control system for preventing ice blockage of pressure regulating valve in distribution station

Abstract

The invention relates to a real-time monitoring system for preventing ice blockage of a pressure regulating valve of a natural gas distributing station yard. The real-time monitoring system comprises an on-site parameter collection module, an on-site alcohol injection module, a process control module and a management module, wherein the on-site parameter collection module is used for collecting dew point, pressure, flow, temperature and valve opening parameters before and after the pressure of a natural gas pipeline is regulated; the process control module is used for transferring on-site real-time data to the management module; the management module is used for analyzing and judging the on-site data and then transferring a control signal to the on-site alcohol injection module through the process control module; and the on-site alcohol injection module is used for automatically completing alcohol injection to the natural gas high-pressure pipeline according to the control signal. The real-time monitoring system has great practical significance on preventing the ice blockage of equipment of the natural gas distributing station yard, safely producing, reducing the prevention cost and increasing the digital level during natural gas distributing, the personal safety of working personnel of a natural gas distributing station is effectively guaranteed, the energy waste is reduced, the operation time of the equipment is saved, and the working efficiency is improved.

Description

technical field [0001] The invention belongs to the field of automatic control systems, and in particular relates to a real-time monitoring system for preventing ice blockage of pressure regulating valves in natural gas distribution stations, which can realize real-time monitoring of station data and automatic start-stop control of alcohol injection devices to prevent distribution The pressure regulating valve of the station is blocked by ice. Background technique [0002] When the natural gas distribution station operates in winter, the pressure regulating valve is prone to ice blockage due to throttling, which seriously affects the safe and stable gas supply of the gas transmission station. Ice blockage is a phenomenon in which some components of water vapor and natural gas generate hydrates under certain pressure and temperature, which block pipelines, equipment and instruments. [0003] Ice blockage has great harm to the pressure regulating valve. First, it blocks the v...

AI Technical Summary

Problems solved by technology

[0003] Ice blockage has great harm to the pressure regulating valve. First, it blocks the valve body, causing stoppage of output, directly affecting downstream civil, commercial and industrial gas; second, the cooling of ice blockage will accelerate the damage of vulnerable parts, such as the regulating diaphragm and sealing The third is that the ice has not had time to melt after thawing. When the valve is opened for the second time, it will hit the pipe or equipment at the elbow under the action of pressure, which may cause the displacement of the pipeline and equipment, causing damage to the pipeline and equipment. Buried a security risk

Simultaneously, because the injection time and quantity of alcohol are controlled only by experience, a large amount of waste of injecting methanol is caused

[0004] Methanol pumps used in the industry currently do not have an automatic start function, and are mainly operated by personnel to inject methanol into the process pipeline of the station. The workload of personnel operation is heavy, and the risk of personnel exposure to methanol and possible poisoning is high.

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