A system and method for condensing and thermally rectifying gaseous fractions at the top of the tower

An overhead gas and fraction technology, which is applied in the field of rectification and energy saving, can solve the problems of safety, large energy consumption, large consumption, etc., and achieves the effect of wide usability and energy reduction.
CN106730967BActive Publication Date: 2019-10-25河北美邦工程科技股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
河北美邦工程科技股份有限公司
Publication Date
2019-10-25

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Abstract

The invention belongs to the fields of rectification and energy conservation and relates to a rectifying system and a rectifying method utilizing tower top gas-phase fraction condensation heat. In the rectifying system, water in a water storage tank and a gas-phase fraction distilled from the top of a rectifying tower perform heat exchange in a condensation and vaporization heat exchanger, water is vaporized into water vapor by the condensation and vaporization heat exchanger, the temperature of the water vapor is increased by a vapor compressor, high-grade water vapor with high temperature is obtained, and the high-grade water vapor can serve as a heating heat source of a reboiler or a raw material preheater, so that the potential heat of the tower top gas-phase fraction is utilized. According to the system and the method, consumption of externally supplied water vapor in the operating process of the rectifying tower is reduced, cooling water for condensation of the tower top gas-phase fraction is omitted, and the aims of saving energy and reducing consumption are fulfilled.
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Description

technical field

[0001] The technical field of rectification and energy saving of the present invention relates to a system and a method for rectifying heat by condensing gas phase fractions at the top of a tower. Background technique

[0002] Due to its excellent separation ability, rectification operation is widely used in various fields of life and production. It is an important unit operation in the separation process. However, the rectification process consumes a lot of energy, and the energy utilization rate is not high. According to statistics, traditional The total energy consumed by the rectification operation accounts for about half of the total energy consumption of industrial production, which is a key step that restricts the entire production process; for example, although the production process of propylene oxide technology by HPPO method is simple, the product yield is high, and it is in line with green Clean production requirements, but the production process ...

Claims

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