City peak shaving station
City peak shaving station
The demand for natural gas at urban peak-shaving stations in summer and winter is very different. Although our country has already seen large imports of natural gas from neighboring countries, there is still a large gap, and the construction period of pipeline gas is very long and the construction cost is high. , It is difficult to solve the current dilemma for a while. In order to effectively promote the balanced use of urban natural gas and enable gas users to obtain sufficient flow and normal pressure of gas supply, effective peak shaving methods must be adopted to promote the balance of supply and demand in the gas transmission and distribution system.
City Peak Shaving Station
The demand for natural gas in the summer and winter is very different. Although our country has already stared at the import volume of natural gas from neighboring countries, there is still a big gap, and the construction period of pipeline gas is very long, the construction cost is high, and it is difficult to solve it for a while. The current dilemma. In order to effectively promote the balanced use of urban natural gas and enable gas users to obtain sufficient flow and normal pressure of gas supply, effective peak shaving methods must be adopted to promote the balance of supply and demand in the gas transmission and distribution system.
With the vigorous development of LNG, LNGc urban peak shaving station has the functions of unloading, storage, vaporization, pressure regulation, BOG recovery, loading and other functions, which is currently an effective solution to the "gas shortage".
After the LNG is transported to the station by the tank truck, the pressure of the unloading booster is used to make the differential pressure between the tank truck pressure and the storage tank> 0.2MPa, and the L NG in the tank truck enters the storage tank for storage through the pressure difference. During peak gas supply, the LNG in the storage tank enters the cryopump through the discharge line to be pressurized to the process pressure, and the pressurized LNG enters the LNG vaporizer to vaporize into gas, and the reheater is reheated to room temperature. Then it is sent to the urban pipe network after voltage regulation, metering and stabilization. In addition, LNG liquid can also be exported through loading pumps and loading skids.
The BOG gas generated during the loading and unloading process first enters the gas phase space of the storage tank and is collected, then reheated by the BOG gas device, pressurized to the process pressure by the compressor, and sent to the main network to avoid waste. The EAG at the station is collected and reheated to room temperature to enter the emission tower for centralized emission.
●The process characteristics of the LNG station are low temperature storage and normal temperature use". The design temperature of the storage tank reaches minus 196 degrees Celsius (the boiling point of LNG at room temperature is minus 162 degrees Celsius), and the outbound natural gas temperature is required to be no lower than the ambient temperature of 10 degrees Celsius.
●The low temperature storage tanks and cryogenic liquid pumps of the station have good thermal insulation performance, and the valves and pipe fittings have good cold insulation performance.
● The equipment, pipes, instruments, valves and accessories in the low temperature area of the L NG station have good operating performance under low temperature conditions, and have good mechanical strength, sealing and corrosion resistance.
The start-up process of the cryogenic liquid pump relies on the frequency converter to continuously increase the speed to increase the power, increase the flow rate and provide high output pressure. Therefore, the Dürr cryogenic liquid pump has a high frequency, usually within a few seconds to ten seconds to meet the requirements, and Good cold and heat insulation performance.
●The manufacture and daily operation management of cryogenic storage tanks and filters have been incorporated into the national regulations on the manufacture, acceptance and supervision of pressure vessels.
Nanyang Duer Gas Equipment Co., Ltd. is a joint-stock high-tech enterprise. The company is located in the picturesque north of the Han River and south of Funiu; the source of the South-to-North Water Diversion-Nanyang, the land of......
South Section of Jingyi Road, Industrial Cluster District, Sheqi County, Nanyang City, Henan Province