Continuous vacuum degassing process for chlorinated paraffin and device thereof

Abstract

The invention belongs to the technical field of fine chemical engineering, and relates to a continuous vacuum degassing process for chlorinated paraffin and a device thereof. A semi-finished chlorinated paraffin product is subjected to degassing refining through two degassing towers, namely, after the flow rate of the semi-finished chlorinated paraffin product is controlled by an automatic regulating valve, the semi-finished chlorinated paraffin product is sprayed out from the upper middle part of the main degassing tower, and under the action of vacuum, a large amount of chlorine and hydrogen chloride gas are egressed; after egressed chlorinated paraffin is pressurized by a circulating pump, one part of the chlorinated paraffin is fed into the upper part of the main degassing tower to carry out spray degassing, the other part of the chlorinated paraffin, after subjected to automatic flow-rate adjustment control, is fed into an assistant degassing tower, and through carrying out chlorine and hydrogen chloride gas egressing for twice, another part of the chlorinated paraffin, after subjected to flow-rate control through the automatic regulating valve, is fed into a finished product storage tank. According to the invention, the whole technological process is completely and automatically controlled, simple and convenient to operate, and large in treatment quantity. Compared with other processes, the process disclosed by the invention is low in energy consumption, the staying time of chlorine and hydrogen chloride gas in chlorinated paraffin is short; chlorinated paraffin is not in contact with other process mediums, so that the product quality can be improved; and a stabilizer is automatically added, so that an effect of safety and environmental friendliness is achieved.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a process for refining chlorinated paraffin semi-finished products and a device thereof. Background technique [0002] At present, the continuous improvement and innovation of my country's chlorinated paraffin continuous production process technology has become mature, but the vast majority of enterprises still use intermittent compressed air or nitrogen to remove hydrogen chloride and free chlorine for the refining of chlorinated paraffin semi-finished products. In this process, the semi-finished chlorinated paraffin is poured into the degassing tank, and the compressed air and nitrogen are blown off from the bottom of the tank for 1-2 hours, then the stabilizer is added and then transferred to the finished product storage tank. This process is intermittent production, and the disadvantages are: The labor intensity is high, the energy consumption is high, the op...

AI Technical Summary

Problems solved by technology

[0002] At present, the continuous improvement and innovation of my country's chlorinated paraffin continuous production process technology has become mature, but the vast majority of enterprises still use intermittent compressed air or nitrogen to remove hydrogen chloride and free chlorine for the refining of chlorinated paraffin semi-finished products. In this process, the semi-finished chlorinated paraffin is poured into the degassing tank, and the compressed air and nitrogen are blown off from the bottom of the tank for 1-2 hours, then the stabilizer is added and then transferred to the finished product storage tank. This process is intermittent production, and the disadvantages are: The labor intensity is high, the energy consumption is high, the operation is cumbersome, and the manual addition of the stabilizer has potential safety hazards

Although the continuous degassing process adopted by a small number of manufacturers has achieved continuous degassing, there are still disadvantages: the process is cumbersome, the operation is difficult, and the production of nitrogen also requires compressed air as a raw material, which is uneconomical. Simply using compressed air as a degassing medium is not only It is uneconomical and will cause moisture to be brought into the chlorinated paraffin to affect product quality, and the number of single sets of equipment and devices is relatively large, and the one-time transformation investment is relatively large

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