Vacuum degree detection method and device for vacuum insulated storage tank

Abstract

The invention discloses a vacuum degree detection method for a vacuum insulated storage tank. The vacuum degree detection method for the vacuum insulated storage tank comprises the following steps that the temperature of the outer surface of a heat insulating material is detected; a vacuum degree numerical value in a vacuum interlayer of the vacuum insulated storage tank to be detected is obtainedaccording to the relationship between the temperature of the outer surface of the heat insulating material and the vacuum degree in the vacuum interlayer; or a temperature threshold is determined according to the relationship between the temperature of the outer surface of the heat insulating material and the vacuum degree in the vacuum interlayer, the obtained temperature is compared with the temperature threshold, and a result is output. The invention further discloses a vacuum degree detection device for the vacuum insulated storage tank. According to the vacuum degree detection method forthe vacuum insulated storage tank, the method that the temperature of the outer wall surface of the multi-layer heat insulating material in the insulated storage tank indirectly represents the vacuumdegree in the insulated storage tank is adopted so that the vacuum degree in the insulated storage tank can be conveniently and accurately detected; and the method is simple in operation, does not need to use an expensive vacuum gauge, avoids additional heat leakage caused by the installation of the vacuum gauge, and can realize remote monitoring at the same time.

Description

technical field [0001] The invention belongs to a vacuum insulation storage tank system, in particular to a method and device for detecting the vacuum degree of a vacuum insulation storage tank. Background technique [0002] With the rapid development of the global economy, the problems of energy shortage and environmental pollution have become more and more prominent. Clean energy represented by natural gas occupies an increasingly important position in the energy system of our country and even the world. According to data from the National Bureau of Statistics of China, China's natural gas imports reached 124.74 billion cubic meters in 2018. In 2017, the "coal to gas" will enter the full implementation stage, and the total demand for gas to replace coal will reach 112.6 billion cubic meters. Such a huge volume has brought many difficulties to the storage and transportation of natural gas. Compared with the storage and transportation in the gaseous state, the liquid form ...

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Problems solved by technology

[0007] Aiming at the problem that the vacuum degree in the vacuum interlayer of the current vacuum insulation storage tank cannot be accurately detected for a long time, which leads to the problem that the safe use of the insulation storage tank cannot be guaranteed, the present invention proposes a method to indirectly characterize the insulation by using the temperature of the outer

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