Skid-mounted fully integrated lng and lcng field substation esd system

Abstract

The invention discloses a skid-mounted fully integrated LNG and LCNG on-site substation ESD system, which belongs to a liquefied or compressed gas supply system, in particular to a skid-mounted fully integrated LNG and LCNG on-site substation safety system. The ESD system is characterized in that it includes an ESD control gas pipeline connected to the gas phase outlet pipeline of the LNG storage tank, an electromagnetic three-way valve is installed on the pipeline, and the ESD control gas pipeline behind the electromagnetic three-way valve is connected to the gas phase respectively. The emergency shut-off valve of the gas outlet pipeline, the emergency shut-off valve of the liquid phase pipeline, and the back pressure chamber of the emergency shut-off valve of the supercharger liquid phase pipeline are connected, and the control line of the electromagnetic three-way valve is connected with the system alarm of the field substation controller and the emergency treatment unit control output circuit. The ESD system can automatically inspect the data of each sensor, judge abnormal phenomena in time, and can send out alarm signals or automatically take emergency shutdown measures according to the range of abnormal data.

Description

technical field [0001] The invention belongs to a liquefied or compressed gas supply system, in particular to a skid-mounted fully integrated safety system for LNG and LCNG on-site substations. Background technique [0002] With the widespread use of natural gas in the automotive field, the number of LNG and LCNG skid-mounted on-site sub-stations is increasing, and the existing on-site sub-stations do not have a complete ESD system (ie, Emergency Shutdown Device emergency parking system), which is generally through sensors In the control room where the relevant data is measured and transmitted, there are control personnel to operate according to whether the detection data is normal or not. When an abnormality is found, the manual operation emergency stop is performed. This method is not timely to deal with the fault, and requires specialized personnel to operate, so it is not suitable for remote control. control. Contents of the invention [0003] In order to overcome the...

AI Technical Summary

Problems solved by technology

[0002] With the widespread use of natural gas in the automotive field, the number of LNG and LCNG skid-mounted on-site sub-stations is increasing, and the existing on-site sub-stations do not have a complete ESD system (ie, Emergency Shutdown Device emergency parking system), which is generally through sensors In the control room where the relevant data is measured and transmitted, there are control personnel to operate according to whether the detection data is normal or not. When an abnormality is found, the manual operation emergency stop is performed. This method is not timely to deal with the fault, and requires specialized personnel to operate, so it is not suitable for remote control. control

Images