A safe handling system for liquefied natural gas delivery hose

Abstract

The invention provides a safety treatment system for liquefied natural gas transportation hoses, which relates to the field of liquefied natural gas transportation, and includes a monitoring integrated unit and a ship response unit. The monitoring integrated unit determines the alarm level according to the values ​​of temperature, pressure and combustible gas concentration in the vacuum insulation layer , the ship response unit determines the corresponding response measures according to the alarm level, which solves the problem that the use of liquefied natural gas delivery hoses for LNG transportation can not effectively sense and respond to the leakage; according to the alarm level, the sound and light alarm prompt, ESD The linkage function of the emergency cut-off system and the emergency release system can respond quickly and effectively reduce the safety risk of LNG leakage.

Description

technical field [0001] The invention relates to the field of liquefied natural gas transportation, in particular to a safety processing system for liquefied natural gas transportation hoses. Background technique [0002] Liquefied natural gas is natural gas that is compressed and cooled to its boiling point of -162°C and becomes liquid. Its volume is about 1 / 625 of the same amount of gaseous natural gas, and its main component is methane. With the rapid growth of my country's demand for natural gas in recent years, China has become the world's second largest importer in 2017. LNG transportation hose is an important equipment for LNG transportation. With the country's emphasis on environmental protection, the proportion of clean energy usage is increasing. LNG transportation hose is used as LNG ship-to-shore transfer and LNG ship-to-ship transfer operations The use of key equipment such as FSRU transfer operations, liquefied natural gas bunkering ship STS bunkering operation...

AI Technical Summary

Problems solved by technology

[0004] The applicant has previously applied for a patent related to crude oil transportation, the publication number is CN107101089A, which discloses a wireless alarm device for external transportation hoses for transporting crude oil at normal temperature, including a wireless transmission alarm device at the end of the external transportation hose and a wireless signal in the central control room. The receiving end device; the wireless transmission alarm device at the end of the outgoing hose includes a first micro-processing unit, a radio frequency transmission system and a pressure sensor connected to the first micro-processing unit, a transmission antenna connected to the radio frequency transmission system, and a power supply Power supply; the wireless signal receiving end device in the central control room includes a second micro-processing unit, a radio frequency receiving system connected to the second micro-processing unit, a sound alarm device and a display screen, and a receiving antenna connected to the radio frequency receiving system; application As the head enterprise of the industry, the company continues to guide the development process of the delivery hose. The inventor found that the current natural gas delivery hose is generally monitored visually by personnel or judged whether there is a leak according to the pressure change in the delivery hose, and then manually stopped. Safety measures such as transportation and detection have problems of inaccuracy and lag, resulting in high safety risks, and due to the influence of waves, slight bending of natural gas transportation hoses can easily affect its internal pressure changes, resulting in more noise interference in the pressure sensing system , the staff had to stop frequently for inspections, which affected the progress of transportation. In view of the colorless, odorless and volatile characteristics of liquefied natural gas, it is difficult to find leakage and easy to explode in high-concentration areas. Compared with crude oil, it is more dangerous. Therefore, the inventor Actively explore how to detect the leakage of the transportation hose in time and automatically take correct and effective emergency measures, thereby effectively reducing the safety risk of LNG transportation operations

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