LNG refueling station equipment LNG storage tank Shaanxi 60 cubic meter natural gas storage tank consultation

Description :

　　LNG storage tanks are important storage containers for LNG refueling stations and an essential component of refueling stations. As a practitioner in the LNG industry, do you really understand them? Let's take a detailed look at them below:

　　LNG refueling station

　　LNG storage tanks should generally be located within cofferdams, with a single tank capacity of 30 cubic meters or 60 cubic meters. The two tanks shown in the diagram are LNG storage tanks.

　　1. Placement form

　　LNG storage tanks generally include vertical tanks and horizontal tanks. Vertical tanks have a small footprint and are easy to use. Due to the gravity difference, they reduce the power consumption of submersible pumps and save electricity. However, vertical storage tanks generally exceed 10 meters, which can cause fear to surrounding residents. Therefore, it is not advisable to install vertical tanks in urban areas; Horizontal tanks are currently the most commonly used form, but the disadvantage is that they occupy a large area and have safety distance requirements from surrounding buildings and facilities inside and outside the station. According to GB50156, the design difficulty is correspondingly increased.

　　Vertical tank

　　Horizontal tank

　　2. Adiabatic form

　　Common insulation forms for LNG storage tanks include high vacuum multi-layer winding insulation and pearl sand powder insulation. The latter is more common in practical applications due to its lower cost.

　　3. Materials

　　The content container is made of austenitic stainless steel 0Cr18Ni9 plate or imported 304 plate; The outer container is made of carbon steel Q345R steel plate

　　4. Security protection system

　　The safety protection system consists of tank accessories including: pressure gauge, level gauge, one in use and one backup fully enclosed safety valve at the root, overflow port, bursting disc

　　vacuum valve

　　5. Filling form

　　There are two methods for LNG storage tanks: top liquid inlet and bottom liquid inlet. Top liquid inlet can use cold liquid to liquefy the BOG gas in the tank. Both methods can be used, and the unloading process needs to be selected according to the site situation, which is complex and difficult to explain in a few words. Friends who have questions can communicate privately.

　　6. Manufacturer

　　At present, the most commonly used ones in China are Beijing Tianhai, Guangxi Guanghui, Anruike, etc. Beijing Tianhai is considered one of the early manufacturers of gas station storage tanks, and the quality is not to be underestimated, and the price is also acceptable; Guangxi Guanghui is a subsidiary of Xinjiang Guanghui, and it is also possible to enter later; Anruike was originally in the CNG business, and their CNG control vehicles should have a domestic market share. They have performed well in the LNG tanker field in the later stage.

　　7. Liquid level conversion

　　The conversion of LNG liquid level to mass volume and mass needs to be determined based on the data provided by the tank manufacturer, combined with the gas quality report data from the liquid plant.

　　8. Technical requirements

　　The general technical agreement requires the LNG storage tank to have a design pressure of 1.3 MPa, a design temperature of -196 ℃, and a daily evaporation rate of no more than 0.20%. The actual working pressure of the storage tank is generally less than 1.0MPa, and the working temperature is generally determined by the mass of the liquid, around -100 ° C.

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• LNG storage tank for LNG refueling station equipment