A safe liquid nitrogen storage tank

Abstract

The invention discloses a liquid nitrogen storage tank safe in use. The tank comprises a storage tank body which is mainly composed of an inner tank, an outer tank, a vacuum cavity, a cooling zone, anitrogen injection opening, a nitrogen discharging opening and a pressure gage; a lifting device is arranged in the inner tank, an abutting plate is fixedly connected to the top of the lifting device,a drainage tube is vertically arranged in the inner tank, a check valve is arranged on the drainage tube, the check valve is switched on downwards, a collecting cover is fixedly connected to the sideedge of the top of the inner tank, and the cooling zone is located between the collecting cover and the outer tank; the a spiral tube is transversely arranged in the cooling zone, the pressure gage is arranged on the top of a device body, and the pressure gage is communicated with the cooling zone. According to the liquid nitrogen storage tank, pressure formed after liquid nitrogen in the storagetank is gasified can be effectively detected, gasified nitrogen can be subjected to refrigeration and liquidation effectively, liquefied nitrogen is diverted into the inner tank, the use safety of the storage tank is improved, the storage tank has the insulation function, and the safety performance of the storage tank is further improved.

Description

technical field [0001] The invention relates to a liquid nitrogen production and processing device, in particular to a safe liquid nitrogen storage tank. Background technique [0002] Nitrogen is widely used in the industrial field, and the application of nitrogen involves all walks of life. Nitrogen can achieve a large degree of economic benefits in industrial production applications, which has driven the development of social economy and improved the living standards of people in our country. [0003] After the production and processing of nitrogen, the nitrogen needs to be liquefied. The liquefied nitrogen is stored in a liquid nitrogen storage tank. The liquid nitrogen storage tank is convenient for the transportation and storage of nitrogen, which provides convenience for the production, processing and customer use of nitrogen. [0004] However, the existing nitrogen storage tank has a simple structure, and liquid nitrogen enters and exits the storage tank through the n...

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Problems solved by technology

[0004] However, the existing nitrogen storage tank has a simple structure, and liquid nitrogen enters and exits the storage tank through the nitrogen injection port for preservation. The existing nitrogen storage tank prevents the pressure in the storage tank from being high due to the gasification of the nitrogen due to the characteristics of the pressure of the steel cylinder. High, the use safety performance is not strong, there are certain safety hazards

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