Gas cylinder static evaporation rate detecting device and method with BOG recovery function

Abstract

The invention discloses a gas cylinder static evaporation rate detecting device and a method with a BOG recovery function. The device comprises a gas cylinder, a flow meter, a storage tank and a control system; the gas cylinder is connected with an inlet in the upper part of the storage tank through a pipelines and a valve body for emptying of the gas cylinder and recovery of BOG in the standing process; the gas cylinder is connected with the flow meter through a pipeline and the valve body; the flow meter is connected with an inlet in the lower part of the storage tank through a pipeline for recovery of BOG in the gas cylinder static evaporation rate detecting process; and the valve body and the flow meter are both connected with the control system. The BOG is recovered in three phases of natural emptying, normal-pressure standing and evaporation rate detection in the gas cylinder static evaporation rate detecting process, so that the energy waste and the environmental pollution are effectively prevented, and the higher practicability is achieved.

Description

technical field [0001] The invention relates to the field of container performance detection, in particular to a gas cylinder static evaporation rate detection device and method with BOG recovery function. Background technique [0002] Liquefied Natural Gas (LNG), whose main component is methane, is a liquid formed when natural gas is purified and cooled to below -162°C. The components of LNG are purer than those of gaseous natural gas. Dust, acid gas, heavy hydrocarbons and other components have been removed. It is colorless, odorless, non-toxic and non-corrosive. It is a high-quality clean energy with the fastest growth rate in the world, and it has been widely used in various power systems such as automobiles, ships, and gas-fired power generation devices, especially LNG-powered vehicles, which are developing very rapidly. Compared with diesel vehicles, LNG vehicles can reduce the content of nitrogen dioxide and carbon dioxide in the tail gas by 98% and 30% respectively,...

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Problems solved by technology

Taking a single gas cylinder with a volume of 500L as an example, the gas cylinder detection process lasts for 49 hours, and the total amount of BOG emitted is about 39.9kg. During the detection process of LNG vehicle gas cylinders, the BOG emission environment requirements are different under different processes, and the emission volume fluctuates. Moreover, BOG is a normal temperature gas, and the recovery efficiency is low. At present, there is no formed recovery system and solution; therefore, it not only causes waste of energy, but also causes environmental pollution.

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