Device and production process for producing 5N-grade high-purity propane by adopting double-tower continuous rectification

Abstract

The invention belongs to a device and a production process for producing 5N-grade high-purity propane by adopting double-tower continuous rectification. The device comprises a raw material liquid storage tank and a product storage tank; the raw material liquid storage tank is connected with a first three-way part through a first raw material inlet of a first heat exchanger, a first raw material outlet of the first heat exchanger, the first raw material inlet of a first rectifying tower, a gas phase outlet of the first rectifying tower, a first raw material gas inlet of a second heat exchanger, the first raw material outlet of the second heat exchanger, a raw material inlet of a gas and liquid separator, a liquid phase outlet of a gas and liquid separator, a second raw material inlet of the first rectifying tower, the liquid phase outlet of the first rectifying tower, the first raw material inlet of a second rectifying tower, the gas phase outlet of the second rectifying tower, a second raw material inlet of the second heat exchanger and a second raw material outlet of the second heat exchanger in sequence; and the third end of the first three-way part is connected with the product storage tank through a seventh regulating valve. The device provided by the invention has the advantages of realizing high purity of a propane product, meeting the requirements of micro-electronic and photo-electronic elements on propane, realizing a large yield and being applicable to large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of producing 5N-grade high-purity propane, and specifically relates to a device and a production process for producing 5N-grade high-purity propane by double-tower continuous rectification. Background technique [0002] High-purity propane is a gas with a wide range of uses. It is not only an important component gas in gas distribution production, but also an important raw material for the production of optoelectronic components. With the development of my country's optoelectronic industry, the demand for high-purity propane is also increasing. There is a good market prospect. We use industrial propane with a purity of 85% that is conveniently available on the market as the raw material, which greatly saves the raw material cost. [0003] Some processes can produce high-purity propane in large-scale industrial production methods, and several technologies suitable for small-batch high-purity propane productio...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects of complex traditional process equipment, large investment, high energy consumption of low-temperature condensation rectification, low thermodynamic efficiency, and low purity of high-purity propane to provide a mixture of propane and ethane as a heat source. After the reboiler at the bottom of the rectification tower is used as a heat source to provide heat, it is condensed into a liquid and then throttled and depressurized to provide cooling capacity for the condenser at the top of the rectification tower, thereby realizing the comprehensive utilization of energy and improving the energy utilization efficiency of the system. Equipment and production process for producing 5N grade high-purity propane by double-tower continuous distillation

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