PRODUCTS
LNG Small Cryogenic Gas Supply Station
1), product description:
LNG gasification station: the gasification station integrates all functions of unloading, storage, gasification, reheating, pressure regulation, metering and odorization, and adopts PLC intelligent control. The process is simple, the structure is mostly a skid block, the on-site installation is convenient, the operation is simple, and the operation is reliable. The "two-way gasification secondary reheating" can be used continuously for 24 hours under any environmental conditions. With its advantages of short construction period and ability to quickly meet the demand of the gas market, LNG gasification station has been gradually built in many small and medium-sized cities with developed economy and energy shortage along the southeast coast of China, and has become a permanent gas supply facility or a transitional gas supply facility before the arrival of pipeline natural gas.
2) Process flow
LNG is transported from the tanker to the gasification station, and the pressure in the tanker is increased by the LNG unloading booster, and the LNG in the tanker is sent to the LNG Cryogenic storage tank for storage. When discharged from the LNG storage tank, the pressure of the storage tank is first increased through the self-pressurization system of the storage tank, then the liquid phase outlet valve of the storage tank is opened, and the LNG in the storage tank is sent to the vaporizer through the pressure difference, and then sent to the municipal gas pipeline network through the processes of pressure regulation, metering and odorization.
When the outdoor ambient temperature is low and the natural gas temperature at the outlet of the air-temperature gasifier is lower than 5 ℃, a water-bath heater shall be connected in series at the outlet of the air-temperature gasifier to heat the gasified natural gas.
3) Main features
① The process of LNG station is characterized by "Cryogenic storage and normal temperature use". The design temperature of the storage tank shall reach negative 196 (the boiling point of LNG at normal temperature is negative 162 degrees Celsius), while the temperature of the outbound natural gas shall not be lower than 10 degrees Celsius of the ambient temperature.
② Station Cryogenic storage tank, Cryogenic liquid pump insulation performance is better, the cold insulation performance of valves and pipe fittings is better.
③ The equipment, pipelines, instruments, valves and their accessories in the Cryogenic area of the LNG station have good operating performance under Cryogenic working conditions, and have good mechanical strength, sealing and corrosion resistance.
Because the cryogenic liquid pump start-up process is to rely on the inverter to continuously increase the speed to increase the power to increase the flow and provide high output pressure, so the cryogenic liquid pump requires increasing the frequency and expanding the power to be fast, usually within a few seconds to ten seconds Can meet the requirements, and cold insulation performance is better.
⑤ Gasification equipment is required to be resistant to earthquakes, typhoons and meet the design requirements under ordinary climatic conditions to achieve greater gasification flow.
⑥ The manufacture and daily operation management of Cryogenic storage tanks and filters have been incorporated into the national specifications for the manufacture, acceptance and inspection of pressure vessels. There are no relevant laws and regulations for vaporizers and Cryogenic hydrocarbon pumps in China. Relevant American industry standards are implemented in the manufacturing process. Welding, modification, maintenance or moving of the position of the pressure vessel on the pressure vessel body shall be reported to the pressure vessel inspection unit.
LNG Small Low Temperature Gas Supply Station
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Ningbo Mingxin Chemical Machinery Co., Ltd.
Address: No. 195, Shengxing Rd, Zhenhai District, Ningbo City, Zhejiang Province, China
Mob: +86-13586833573
Tel: +86-574-87355790
Email: web@nmhj.com
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