An air separation energy-saving control device and method

Abstract

The invention relates to the technical field of intelligent air separation equipment, in particular to an air separation energy-saving control device and method. The device includes AI control subsystem, molecular sieve system, water tank connected with molecular sieve system and heat exchanger, heat exchanger connected with molecular sieve system and water tank, cooling rectification tower, gas storage connected with cooling rectification tower device and a liquid nitrogen storage device, the liquid nitrogen storage device is used to cool down the liquid nitrogen entering the liquid nitrogen storage device and control the flow of liquid nitrogen from the liquid nitrogen storage device into the cooling rectification tower; the molecular sieve system includes a plurality of molecular sieves Each molecular sieve group includes a plurality of molecular sieves and a baffle plate arranged under the molecular sieve, and the baffle plate includes air-barrier cotton and a support frame arranged under the air-barrier cotton; the present invention can control the working molecular sieve according to market conditions Quantity, make full use of the temperature of liquid nitrogen, and do not need to continuously input liquid nitrogen from the outside to cool liquid nitrogen from -198°C to -200°C, with less energy consumption and low cost.

Description

technical field [0001] The invention relates to the technical field of intelligent air separation equipment, in particular to an air separation energy-saving control device and method. Background technique [0002] Air separation engineering, in simple terms, is the process of separating oxygen, nitrogen, argon and other gases in the air with high purity through a set of large-scale air separation system equipment. Pure oxygen, pure nitrogen and other gas products separated by air separation equipment will be used in many fields such as metallurgy, chemical industry, photovoltaic industry, polysilicon, magnetic materials, electronic semiconductors, medical treatment, and food. The main components in the air are oxygen, nitrogen, argon, carbon dioxide and some water vapor and impurities. The air separation method usually uses molecular sieve adsorption or rectification. Molecular sieve adsorption usually produces products with lower purity, and molecular sieve adsorption and ...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the object of the present invention is to provide an air separation energy-saving control device and method to solve the technical problems that the air separation equipment in the prior art cannot automatically save energy during the off-season of gas production, and the energy loss is large, specifically through the following technical solutions accomplish:

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