Rectifying column tail gas self-circulation utilization system with high-temperature-rise compressor

Abstract

The invention provides a rectifying column tail gas self-circulation utilization system with a high-temperature-rise compressor. The system comprises a primary preheater, a secondary preheater, a rectifying column, a steam generator, a steam buffer tank and a centrifugal steam compressor unit, wherein the centrifugal steam compressor unit comprises the high-temperature-rise compressor; rectification raw water is preheated by the primary preheater and the secondary preheater and then enters the rectifying column; tail gas exhausted by the rectifying column enters the steam generator to exchangeheat with deionized water to generate secondary steam, and the secondary steam is buffered by the steam buffer tank, then enters the high-temperature-rise compressor, does work through the high-temperature-rise compressor and then enters the rectifying column to serve as a circulating heating medium of materials; the secondary steam after work by the high-temperature-rise compressor can also be directly discharged into a low-pressure steam pipe network through valve switching. According to the system, tail gas waste heat of the rectifying column is effectively utilized through the high-temperature-rise compressor, a small amount of electric energy is used for acting to utilize generated secondary steam, consumption of live steam is greatly reduced, and economic benefits of enterprises areincreased.

Description

Technical field: [0001] The invention belongs to the field of rectification, and specifically relates to a rectification tower tail gas self-circulation utilization system with a high-temperature boost compressor. Background technique: [0002] In petroleum and chemical production, continuous emissions from rectification towers are common, such as catalytic cracking fractionation towers in oil refining production, depropanizers in gas separation units, dehydration towers in butadiene rubber, butadiene recovery towers, and ethylene The exhaust gas from the tail cooler is a kind of organized emission of VOCs. [0003] The tail gas discharged from the rectification tower is the largest source of volatile organic pollutants in petroleum and chemical production. The emptying of the rectification tower is also a common problem that is difficult to solve in the petroleum and chemical production. Summary of the invention: [0004] In order to solve the current problem of volatile organic p...

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Problems solved by technology

[0004] In order to solve the current problem of volatile organic pollutant emissions from the tail gas of the rectification tower, the present invention provides a self-circulation utilization system for the tail gas of the rectification tower with a high-temperature rise compressor, which effectively utilizes the waste heat of the tail gas of the rectification tower through the high-temperature rise compressor, so as to A small amount of electric energy is used to make use of the secondary steam generated, which greatly saves the consumption of raw steam and increases the economic benefits of the enterprise

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