LNG overwater filling and pumping stop control system and overwater filling type LNG station

Abstract

The invention discloses an LNG overwater filling and pumping stop control system and an overwater filling type LNG station. The LNG overwater filling and pumping stop control system comprises a signalconverting module and a host; the signal converting module is electrically connected to a temperature transmitter of filled equipment so as to convert a standardized electric signal output by the temperature transmitter to a digital value signal; and the host is electrically connected between the signal converting module and an LNG filling pump of the overwater filling type LNG station so as to receive the digital value signal, a standardized temperature difference value is written into a procedure of the host in advance, and when the measured temperature difference value shown by the digitalvalue signal is larger than or equal to the standardized temperature difference value, the host sends out a switching value signal so as to control the LNG filling pump to stop filling. According tothe LNG overwater filling and pumping stop control system, the convenient and rapid effects are achieved, the accuracy is high, the manpower cost can be reduced, and a false instruction sent out by manual mistaken judgment is completely eradicated.

Description

technical field [0001] The invention relates to the technical field of LNG filling over water, in particular to a pump stop control system for filling over water of LNG and an LNG station for filling over water. Background technique [0002] When LNG filling is carried out on land, the vehicle-mounted tank to be injected is usually in the structure of a Dewar bottle. Due to the special structure of the tank, the LNG filling station on land can detect the data (pressure) through the operation of the LNG filling pump. Determine whether the Dewar bottle is full and automatically execute the pump stop action. However, in water filling LNG stations (such as pontoons, shore base stations), since the tanks of the receiving ship are usually fuel tanks, which are ordinary C-type storage tanks, the LNG filling pumps of water filling LNG stations It is impossible to determine whether the fuel tank is full through the detection data, and it is also impossible to determine the stop time...

AI Technical Summary

Problems solved by technology

The above-mentioned existing pump stop method is highly dependent on manual work, the information feedback time is long, the human response and execution time is long, and the pump stop time error is large

Images