Gas mixing and compounding method and gas mixing and compounding system

Abstract

The invention provides a gas mixing and compounding method and a gas mixing and compounding system. The system comprises a gas inlet device, a gas mixing device and a gas regulating box. The gas mixing device comprises a gas mixing tank and a vacuum pump. The gas mixing tank is connected to one end, away from a gas supply bottle, of a gas conveying pipeline. The inlet of the vacuum pump is respectively connected to the gas mixing tank and the gas regulating box. The outlet of the gas mixing tank is connected to the inlet of the gas regulating box. The gas mixing tank is provided with a pressure controller, and the pressure controller is used for detecting gas pressure in the gas mixing tank. The method is capable of, according to a Dalton's law of partial pressure, changing a more difficultly measured volume variable into a more easily measured pressure variable, and according to a partial pressure of each gas in the gas mixing tank, determining a volume ratio of each gas component inan obtained mixed gas, thereby overcoming an error, of a traditional flowmeter or a double-linkage proportion regulating value, caused by the effects of gas density, a turbulence degree and the like,and improving stability of the whole gas mixing system.

Description

technical field [0001] The invention belongs to the technical field of gas mixing, and in particular relates to a gas mixing method and a gas mixing system. Background technique [0002] The gas mixing system is the core component of the modified atmosphere packaging equipment. In recent years, with the vigorous development of fresh food e-commerce and the continuous improvement of food preservation technology, modified atmosphere preservation technology has also developed rapidly. At present, the gas mixing system used in the modified atmosphere fresh-keeping packaging equipment on the market mainly has two forms: gas mixer and gas flow meter. [0003] The main principle of the gas mixer is to install a gas pressure sensor in the front section of the air intake, and adopt the pressure chamber diaphragm type gas equal pressure technology in the middle section of the air intake. The above two measures perform equal pressure control on the intake air. The core component for ...

AI Technical Summary

Problems solved by technology

During the whole process of gas distribution, the flow meter will cause fluctuations in the gas flow when encountering the pressure drop of the gas source and the intermittent gas supply of the back-end packaging machine, which will lead to unstable precision of the mixed gas, and in severe cases will directly lead to mixing There is a large error in the ratio

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