CN-115722061-B - Antimony ingot production waste gas treatment system

Abstract

The invention relates to the technical field of waste gas treatment, in particular to an antimony ingot production waste gas treatment system which comprises a cooling unit, a dust removal unit and an adsorption unit, wherein the adsorption unit comprises a first adsorption unit and a second adsorption unit, the first adsorption unit reduces the SO 2 content in waste gas through a sodium-alkali method to obtain low SO 2 concentration waste gas, the second adsorption unit treats the low SO 2 concentration waste gas through a super-crosslinked porous ionic polymer to obtain purified waste gas, and the SO 2 content in the waste gas treated by the system is less than or equal to 50mg/m 3 , SO that the waste gas emission standard is met.

Inventors

• GONG WEN

Assignees

• 贵州华星冶金有限公司

Dates

Publication Date

20260508

Application Date

20221117

Claims (6)

1. 1. The waste gas treatment system for antimony ingot production is characterized by comprising a cooling unit, a dust removal unit and an adsorption unit; The adsorption unit comprises a first adsorption unit and a second adsorption unit, wherein the first adsorption unit reduces the content of SO 2 in the waste gas by a sodium-alkali method to obtain waste gas with low SO 2 concentration; The second adsorption unit is used for treating the waste gas with low SO 2 concentration through the super-crosslinked porous ionic polymer to obtain purified waste gas; the super-crosslinked porous ionic polymer is prepared from 1- (4-vinylbenzyl) -1H-imidazole as a raw material; the preparation method of the super-crosslinked porous ionic polymer comprises the following steps: Under the protective gas atmosphere, adding 1- (4-vinylbenzyl) -1H-imidazole and a free radical catalyst into a first solvent, uniformly mixing and stirring, heating and reacting for 8-12H, recovering room temperature, filtering, washing and drying the obtained solid, adding into a second solvent, adding haloalkylamine, heating and reacting for 24-48H, concentrating under reduced pressure, washing and drying the obtained solid with a third solvent, adding into a fourth solvent, adding sodium proline, reacting for 48-60H at room temperature, filtering, collecting filtrate, and concentrating under reduced pressure; The haloalkylamine is chlorine, bromine or iodine substituted alkylamine, and the carbon number of the alkylamine is more than or equal to 4.
2. 2. The antimony ingot production waste gas treatment system of claim 1, wherein the first solvent, the second solvent, the third solvent, and the fourth solvent are any one or more of petroleum ether, acetone, methanol, ethanol, dichloromethane, ethyl acetate, benzene, toluene, DMF, DMSO, or water.
3. 3. The antimony ingot production waste gas treatment system according to claim 1, wherein the haloalkylamine is chlorobutylamine or chloropentylamine.
4. 4. The antimony ingot production waste gas treatment system according to claim 1, wherein the first adsorption unit comprises a packed tower and a packing filled in the packed tower, and waste gas enters the packed tower from a gas inlet at the bottom of the packed tower after being cooled by the cooling unit and contacts with absorption liquid flowing in from a liquid inlet at the top of the packed tower.
5. 5. The antimony ingot production waste gas treatment system according to claim 4, wherein the absorption liquid is sodium hydroxide solution or sodium carbonate solution.
6. 6. The antimony ingot production waste gas treatment system according to claim 4, wherein the packing is a saddle ring, raschig ring or pall ring.

Description

Antimony ingot production waste gas treatment system Technical Field The invention relates to the technical field of waste gas treatment, in particular to a waste gas treatment system for antimony ingot production. Background Antimony smelting technology is divided into a fire method and a wet method, and the fire method technology is dominant at present, and a representative treatment process for smelting antimony by the fire method is a 'blast furnace volatilization smelting-reverberatory furnace reduction' process. The blast furnace volatilization smelting process has the advantages of strong raw material adaptability, high metal recovery rate, large production capacity, easy mechanical operation and the like, but the process has the defects of large waste gas production amount, high concentration of SO 2 in the flue gas in the waste gas and the like. Disclosure of Invention The invention aims to solve the technical problems, and provides an antimony ingot production waste gas treatment system. The technical scheme adopted is as follows: An antimony ingot production waste gas treatment system comprises a cooling unit, a dust removal unit and an adsorption unit; The adsorption unit comprises a first adsorption unit and a second adsorption unit; The first adsorption unit reduces the content of SO 2 in the waste gas by a sodium-alkali method to obtain waste gas with low SO 2 concentration; And the second adsorption unit is used for treating the waste gas with low SO 2 concentration through the super-crosslinked porous ionic polymer to obtain purified waste gas. Further, the super-crosslinked porous ionic polymer is prepared from 1- (4-vinylbenzyl) -1H-imidazole as a raw material. Further, the preparation method of the super-crosslinked porous ionic polymer comprises the following steps: The self-polymerization of 1- (4-vinyl benzyl) -1H-imidazole, the quaternization with haloalkylamine, and the anionic substitution to obtain the super-crosslinked porous ionic polymer. Further, the preparation method of the super-crosslinked porous ionic polymer comprises the following steps: Under the protective gas atmosphere, adding 1- (4-vinylbenzyl) -1H-imidazole and a free radical catalyst into a first solvent, uniformly mixing and stirring, heating and reacting for 8-12H, recovering room temperature, filtering, washing and drying the obtained solid, adding into a second solvent, adding haloalkylamine, heating and reacting for 24-48H, concentrating under reduced pressure, washing and drying the obtained solid with a third solvent, adding into a fourth solvent, adding sodium proline, reacting for 48-60H at room temperature, filtering, collecting filtrate, and concentrating under reduced pressure. Further, the first solvent, the second solvent, the third solvent and the fourth solvent are any one or more of petroleum ether, acetone, methanol, ethanol, dichloromethane, ethyl acetate, benzene, toluene, DMF, DMSO or water. Further, the haloalkylamine is chlorine, bromine or iodine substituted alkylamine, and the carbon number of the alkylamine is more than or equal to 4. Further, the haloalkylamine is chlorobutylamine or chloropentylamine. Further, the first adsorption unit comprises a packing tower and packing filled in the packing tower, and the waste gas enters the packing tower from an air inlet at the bottom of the packing tower after being cooled by the cooling unit and contacts with the absorption liquid flowing in from a liquid inlet at the top of the packing tower. Further, the absorption liquid is sodium hydroxide solution or sodium carbonate solution. Further, the packing is a saddle ring, a raschig ring or a pall ring. The invention has the beneficial effects that: The invention provides an antimony ingot production waste gas treatment system, which is characterized in that the content of SO 2 in antimony ingot production waste gas is reduced by combining a first adsorption unit and a second adsorption unit to enable the content to reach emission standard, wherein a sodium alkali method has mature technology, generated ash can be recycled as building materials through precipitation, but along with the gradual strictness of the emission standard, a single sodium alkali method is gradually inapplicable, in recent years, researchers try to develop an ionic porous organic polymer, and the structure and performance of the ionic porous organic polymer are regulated and controlled by controlling the skeleton structure of the polymer and changing the type of counter ion, SO that the structure and performance of the ionic porous organic polymer have wider application prospect in the fields of proton conduction, heterogeneous catalysis, antibiosis, sewage treatment and the like. Drawings FIG. 1 is a schematic diagram of an exhaust gas treatment system for antimony ingot production in example 1 of the invention, wherein reference numerals respectively represent: the device comprises a 1-cooling unit, a 2-liquid storage tan