Novel gas-liquid separation recovery technology and device in chlorination process of chlorinated paraffin

Abstract

The invention discloses a novel gas-liquid separation recovery technology and device in a chlorination process of chlorinated paraffin. The device comprises a liquid chlorine vaporizer, wherein a liquid chlorine inlet is formed in the bottom of the liquid chlorine vaporizer; a vaporized warm water outlet is formed in the top of the left side of the liquid chlorine vaporizer; a vaporized warm waterinlet and a chlorine gas outlet are respectively formed in the left and right ends on the top of the liquid chlorine vaporizer; a high-temperature water outlet and a low-temperature water outlet arerespectively formed in the top and the bottom on the right side of the liquid chlorine vaporizer; and a graphite heat exchanger is arranged on the right of the liquid chlorine vaporizer. According tothe technology and device disclosed by the invention, tail gases in the chlorination process are cooled by a cold source on a liquid chlorine vaporization section in the chlorination process, the vapor-liquid separation effect on the exhaust treatment section can be greatly improved under the condition that the energy consumption is basically not increased, the yield of the device is greatly improved from initial 99.5% to 99.95% or higher, the unit consumption of the product is reduced, the quality of by-product hydrochloric acid is improved, and paraffin oil in a by-product hydrochloric acidprocess tank and a storage tank is basically eliminated.

Description

technical field [0001] The invention relates to the technical field of chlorinated paraffin production technology, in particular to a new technology and device for gas-liquid separation and recovery in the chlorinated paraffin chlorination process. Background technique [0002] Chlorinated paraffin is a chlorinated derivative of paraffin. It has the advantages of low volatility, flame retardancy, good electrical insulation, and low price. It can be used as a flame retardant and an auxiliary plasticizer for polyvinyl chloride. Widely used in the production of cable materials, floor materials, hoses, artificial leather, rubber and other products. And additives used in coatings, plastic track, lubricating oil, etc. The current mainstream production process in China is the photocatalytic continuous production process, but the problem of liquid paraffin entrainment in the tail gas of this process is prominent. When the device is operating at a high load, the unit consumption of ...

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Problems solved by technology

The current mainstream production process in China is the photocatalytic continuous production process, but the problem of liquid paraffin entrainment in the tail gas of this process is prominent. When the device is operating at a high load, the unit consumption of the raw material liquid wax increases, and the by-product hydrochloric acid contains paraffin oil, which leads to a serious decrease in quality. And after long-term operation of the device, the treatment load of the hydrogen chloride absorption system is reduced due to wax oil pollution, etc.

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