An energy-saving air separation cooling system and method

Abstract

The present invention relates to the technical field of intelligent air separation equipment, in particular to an energy-saving air separation cooling system and method; the system includes an AI control subsystem, a molecular sieve system, a cooling rectification tower, a liquid nitrogen storage device, and a cooling exchange subsystem , an indoor water tank, a heat exchanger and a gas storage device, the liquid nitrogen storage device is used to control the flow of liquid nitrogen into and out of the liquid nitrogen tube group, the indoor water tank is used to control the flow of water into and out of the cooling water pipe, and the heat exchanger is used Before the control water flows into the cooling water pipe after flowing out of the indoor water tank, it exchanges heat with the nitrogen flowing out of the liquid nitrogen tube group; the AI ​​control subsystem includes a data storage device, a statistic device and a controller; the present invention utilizes the AI ​​control subsystem, according to The expected gas production rate determines the number of groups of liquid nitrogen pipes flowing through the cooling distillation tower to achieve precise and intelligent control of the input volume of liquid nitrogen, avoiding excessive input of liquid nitrogen, causing energy waste, and reducing energy consumption. Reduce labor costs and reduce production costs.

Description

technical field [0001] The invention relates to the technical field of intelligent air separation equipment, in particular to an energy-saving air separation cooling system and method. Background technique [0002] The air separation industry is a green and environmental protection industry, with a small footprint, no pollution to the environment, and in line with national industrial policies. The air separation project is actually a 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, and the pure oxygen, pure nitrogen and other gas products separated by air separation equipment , It can be used in many fields such as metallurgy, chemical industry, photovoltaic industry, polysilicon, magnetic materials, electronic semiconductors, medical treatment, food and so on. The main components in the air are oxygen, nitrogen, argon, carbon dioxide and some water vapor and impurities. T...

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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide an energy-saving air separation cooling system and method to solve the problem that the cooling capacity of the liquid nitrogen liquefied air in the cooling rectification tower cannot be accurately controlled when the air separation equipment in the prior art is used for air separation. , resulting in the technical problems of excessive input of liquid nitrogen and large energy loss

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