Flat-bottom vertical dual-wall liquefied natural gas storage tank

Abstract

The invention discloses a flat-bottom vertical dual-wall liquefied natural gas storage tank which comprises an inner tank, a first pressure tapping pipe and a second pressure tapping pipe. An outer tank is arranged on the outer portion of the inner tank and wraps the inner tank. A gap between the outer tank and the inner tank is filled with a heat insulation layer. One end of the first pressure tapping pipe enters the inner tank through a transition pipe arranged on the side wall of the inner tank, and the other end of the first pressure tapping pipe enters a buffer tank in the outer tank. Oneend of the second pressure tapping pipe is inserted into the buffer tank, and the other end of the second pressure tapping pipe is connected with an instrument valve after passing through a heat preservation pipe arranged on the side wall of the outer tank. According to the flat-bottom vertical dual-wall liquefied natural gas storage tank, the buffer tank is arranged in the space between the outer tank and the inner tank, the pressure tapping precision of the second pressure tapping pipe is improved, the value fluctuation of the instrument valve arranged on the second pressure tapping pipe becomes smaller, and measurement precision is higher.

Description

technical field [0001] The invention relates to an improvement of a flat-bottomed vertical double-wall liquefied natural gas storage tank, in particular to a flat-bottomed vertical tank that can reduce the pressure fluctuations caused by the tumbling of the liquefied natural gas inside the liquefied natural gas storage tank to the pressure point and improve the accuracy of the pressure. Type double-wall LNG storage tank. Background technique [0002] As an important storage facility of LNG liquefaction plant, the safety of LNG storage tank not only directly affects the production of LNG liquefaction plant and the export of natural gas, but also directly affects the investment and operation economics of the plant. So far, the design and construction technology of large-scale liquefied natural gas storage tanks in my country is still immature, and the core technology of liquefied natural gas has not been mastered. The key technology of tank farm design, establish a complete se...

AI Technical Summary

Problems solved by technology

Due to the tumbling and stratification of the inner tank due to the composition of the liquefied natural gas, the pressure fluctuations in the inner tank are caused. This structure cannot effectively avoid the interference of the pressure fluctuations in the inner tank on the instrumentation equipment.

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