Method for comprehensively utilizing yellow phosphorus tail gas
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A yellow phosphorus tail gas and gas technology, applied in separation methods, chemical instruments and methods, using solid contact hydrogen separation, etc., can solve problems such as the complex composition of yellow phosphorus tail gas, reduce operating costs, reduce production costs, and significantly reduce social costs. benefit effect
Active Publication Date: 2015-12-30
HAISO TECH
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[0013] The technical problem to be solved by the present invention is to provide a comprehensive utilization of yellow phosphorus tail gas that can rationally and effectively utilize yellow phosphorus tail gas, reduce environmental pollution, and realize circular economic utilization of resources based on the characteristics of complex components of yellow phosphorus tail gas method
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Embodiment 1
[0031] A factory produces yellow phosphorus by-product yellow phosphorus tail gas 63000Nm 3 / h, gas composition: 86.3% CO, 5.1% H 2 , 0.5% O 2 , 2%CO 2 , 0.2%CH 4 , containing trace impurity H 2 S500ppm, organic sulfur 2ppm, cyanide 30ppm, arsenide 0.7ppm, phosphide 600ppm, fluoride 0.4ppm, chloride 0.8ppm, metal carbonyl 1ppm, the rest is N 2 . The method of described dephosphorization is to use adsorption method dephosphorization to make pH 3 content 3 <0.1ppm.
[0032] Such as figure 1As shown, after the yellow phosphorus tail gas is washed with water and alkali, it is composed of commercially available industrial fine desulfurizers, dephosphorization agents, arsenic removal agents, defluorination agents, dechlorination agents, decarbonylation metal catalysts, HCN removal catalysts, and deoxidizers. The deep purification section removes the impurity content in the tail gas to H 2 S2 3 3 2 <200ppm. The removal of phosphorus adopts the method of adsorption plus cata...
Embodiment 2
[0037] A factory produces yellow phosphorus by-product yellow phosphorus tail gas 40000Nm 3 / h, gas composition: 83.1% CO, 7.8% H 2 , 0.3% O 2 , 1.8%CO 2 , 0.4%CH 4 , containing trace impurity H 2 S380ppm, organic sulfur 2.6ppm, cyanide 20ppm, arsenide 0.9ppm, phosphide 560ppm, fluoride 0.3ppm, chloride 0.5ppm, metal carbonyl 1ppm, the rest is N 2 . The method of described dephosphorization is to use adsorption method dephosphorization to make pH 3 content 3 <0.1ppm.
[0038] Such as figure 1 As shown, after the yellow phosphorus tail gas is washed with water and alkali, it is composed of commercially available industrial fine desulfurizers, dephosphorization agents, arsenic removal agents, defluorination agents, dechlorination agents, decarbonylation metal catalysts, HCN removal catalysts, and deoxidizers. The deep purification section removes the impurity content in the tail gas to H 2 S2 3 3 2 <200ppm. The removal of phosphorus adopts the method of adsorption plus...
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Abstract
The invention relates to a method for comprehensively utilizing yellow phosphorus tail gas. The method is characterized by comprising the steps that after the yellow phosphorus tail gas is washed by water and alkali, H2S, COS, CS2, PH3, AsH3, HF, HCN, HCl, carbonyl metal and O2 in the yellow phosphorus tail gas can be removed through deep purification including the steps of removal of sulfur, phosphorus, arsenic, fluorine, chlorine, HCN, carbonyl metal and oxygen; then one part of yellow phosphorus tail gas which is deeply purified is used for separating CO through pressure swing adsorption, and the other part of yellow phosphorus tail gas is used for preparing high-concentration H2 through transformation; the volume ratio of the yellow phosphorus tail gas used for separating out the CO through pressure swing adsorption to the yellow phosphorus tail gas used for synthesizing the H2 through transformation is 1:1-1:3. The prepared pure CO and the prepared pure H2 are used as fed gases and can be used for producing ethylene glycol (EG). Based on the characteristic that the components of the yellow phosphorus tail gas are complex, the method for comprehensively utilizing the yellow phosphorus tail gas is provided. The yellow phosphorus tail gas can be utilized reasonably and effectively, environmental pollution is reduced and cyclic and economical utilization of resources is realized.
Description
technical field [0001] The invention relates to the technical fields of purification, separation and the like, and in particular to a comprehensive utilization method of yellow phosphorus tail gas. Background technique [0002] Ethylene glycol (EG) is an important organic chemical raw material, which can react with terephthalic acid (PTA) to produce polyethylene terephthalate (PET), that is, polyester resin, which can be used as polyester fiber and The raw material of polyester plastic, which is currently the most important use of ethylene glycol. Ethylene glycol can also react with polybasic acids such as phthalic acid, maleic acid, and fumaric acid to form corresponding polymers, collectively called alkyd resins. Secondly, ethylene glycol can also be directly used in antifreeze and engine coolant. Ethylene glycol dinitrate can be used in explosives, and it is also indispensable for the production of plasticizers, paints, adhesives, and capacitor electrolytes. important s...
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