Method for comprehensively utilizing tail gas of sludge phosphorus-prepared sodium hypophosphite

A technology of sodium hypophosphite and sodium hypochlorite solution, applied in the directions of hypophosphorous acid, phosphorus oxyacid, separation method, etc., can solve the problems of long process, high risk, environmental pollution, etc., and achieves improved absorption efficiency, good gas scrubbing effect, The effect of high absorption efficiency
CN101653692AInactive Publication Date: 2010-02-24KUNMING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
KUNMING UNIV OF SCI & TECH
Publication Date
2010-02-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for comprehensively utilizing and processing tail gas of sludge phosphorus-prepared sodium hypophosphite, belonging to the technical field of chemical engineering andenvironmental protection. The process flow thereof is as follows: (1) after the phosphine tail gas of the sludge phosphorus-prepared sodium hypophosphite is collected, particle impurities in the tailgas are rinsed and eliminated by phosphoric acid solution under the condition that nitrogen is used as protective carrier gas; (2)the impurified tail gas is eliminated sequentially enters a three-grade absorption device adopting sodium hypochlorite solution as absorption solution so that the product of sodium hypophosphite can be obtained; and (3) the phosphine which still exists in the absorbedtail gas is adsorbed by modified activated carbon, and then is emitted outside after reaching the emission standard. The method of the invention is economical and practical, can recycle and convert the phosphine in the tail gas into the product of sodium hypophosphite with high added value, and greatly reduces environmental pollution caused by the tail gas.
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Description

technical field

[0001] The invention relates to a method for comprehensively utilizing and treating sludge phosphorus to produce sodium hypophosphite tail gas, belonging to the technical fields of chemical industry and environmental protection. Background technique

[0002] my country is a large phosphorus-producing country. In the past 20 years, the development of the phosphorus chemical industry has occupied an important position in the overall layout of the international phosphorus chemical industry, and has made great contributions to the development and prosperity of the social economy.

[0003] At present, most of the domestic yellow phosphorus production enterprises adopt the process technology of producing yellow phosphorus in the electric furnace method. This process is to place the mixture of phosphate rock, silica and coke in a closed three-phase electric furnace, and reduce it at a high temperature of 1400 ° C to 1500 ° C. The solid waste (commonly known as mud p...

Claims

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