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Method for absorbing hydrogen sulfide tail gas in sulfide precipitation system

A technology of sulfide precipitation and hydrogen sulfide, which is applied in chemical instruments and methods, separation methods, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of high environmental protection costs, many manpower for alkali preparation, and large alkali consumption, and achieve treatment Low cost, remarkable absorption effect, simple and practical process

Inactive Publication Date: 2019-08-13
ZIJIN MINING GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, those who use lye to absorb hydrogen sulfide have problems such as large alkali consumption, many manpower for alkali preparation, and high environmental protection costs. If special equipment or systems are used, the cost will be even worse.

Method used

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  • Method for absorbing hydrogen sulfide tail gas in sulfide precipitation system
  • Method for absorbing hydrogen sulfide tail gas in sulfide precipitation system
  • Method for absorbing hydrogen sulfide tail gas in sulfide precipitation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: The daily treatment capacity of acidic wastewater from metal mines in a mine sulfide precipitation environmental protection treatment system is 30,000m 3 , The water quality of wastewater: pH=2.5, Cu=500mg / L, Fe=6g / L, the system prepares sodium sulfide solution to recover valuable metal copper in wastewater. Sodium sulfide preparation barrels, copper sinking reaction tanks, copper sulfide flocculation tanks, copper sulfide dense tanks, and copper sulfide filter press workshops that generate hydrogen sulfide gas are all made in a closed type, and the induced draft fan connects the collected hydrogen sulfide gas to the Gas absorption tower. The hydrogen sulfide concentration at the inlet of the gas absorption tower is 2700mg / m 3 , the emission rate is 3.80kg / h, and after the acid wastewater spraying and absorption of the third-level metal mine, the concentration of hydrogen sulfide at the exhaust port of the gas absorption tower (height: 15m) is reduced to 14m...

Embodiment 2

[0029] Example 2: The daily treatment capacity of acidic wastewater from metal mines in a mine sulfide precipitation environmental protection treatment system is 30,000m 3 , The water quality of wastewater: pH=2.5, Cu=500mg / L, Fe=6g / L, the system prepares sodium sulfide solution to recover valuable metal copper in wastewater. Sodium sulfide preparation barrels, copper sinking reaction tanks, copper sulfide flocculation tanks, copper sulfide dense tanks, and copper sulfide filter press workshops that generate hydrogen sulfide gas are all made in a closed type, and the induced draft fan connects the collected hydrogen sulfide gas to the Gas absorption tower. The hydrogen sulfide concentration at the inlet of the gas absorption tower is 1300mg / m 3 , the discharge rate is 1.86kg / h, and after the acid wastewater spraying and absorption of the third-level metal mine, the concentration of hydrogen sulfide at the exhaust port of the gas absorption tower (height: 15m) is reduced to 10...

Embodiment 3

[0032] Example 3: The daily treatment capacity of acidic wastewater from metal mines in a mine sulfide precipitation environmental protection treatment system is 30,000m 3 , The water quality of wastewater: pH=2.5, Cu=500mg / L, Fe=6g / L, the system prepares sodium sulfide solution to recover valuable metal copper in wastewater. Sodium sulfide preparation barrels, copper sinking reaction tanks, copper sulfide flocculation tanks, copper sulfide dense tanks, and copper sulfide filter press workshops that generate hydrogen sulfide gas are all made in a closed type, and the induced draft fan connects the collected hydrogen sulfide gas to the Gas absorption tower. The hydrogen sulfide concentration at the inlet of the gas absorption tower is 800mg / m 3 , the discharge rate is 0.85kg / h, and after the acid wastewater spraying and absorption of the tertiary metal mine, the concentration of hydrogen sulfide at the exhaust port of the gas absorption tower (height: 15m) is reduced to 3mg / m ...

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Abstract

The invention relates to a method for absorbing hydrogen sulfide tail gas in a sulfide precipitation system. The method comprises the steps that metal mine acidic wastewater generated by a metal minein a mining and smelting process enters the sulfide precipitation system, then metal sulfide is generated, and valuable metal is recovered; the hydrogen sulfide tail gas generated in the sulfide precipitation system is uniformly concentrated to a spray absorption device, a part of the metal mine acidic wastewater is drained to the spray absorption device to perform spraying on the hydrogen sulfidetail gas, so that metal ions in the metal mine acidic wastewater react with the hydrogen sulfide gas according to a chemical reaction formula shown in the description, wastewater mixed with the metalsulfide and up-to-standard gas are obtained, and the up-to-standard gas is discharged. The method for absorbing the hydrogen sulfide tail gas in the sulfide precipitation system has the advantages that no drug or special system or equipment is needed, no new harmful impurities are introduced, no addition of environmental protection investment is needed, the metal mine acidic wastewater is used for treating the hydrogen sulfide gas, the purified gas is discharged after reaching the standard, the process is simple and practical, the treatment cost is low, the absorption effect is obvious, and the method is especially applied to metal mines and hydrometallurgical industries.

Description

technical field [0001] The invention relates to an absorption method for a sulfide precipitation system, which is especially suitable for the application in metal mines and hydrometallurgy industries. Background technique [0002] With the strict implementation of environmental protection laws and regulations, various industries adopt different treatment methods according to the nature of hydrogen sulfide gas produced by themselves: (1) The waste gas produced by chemical industry, light industry and other industries has high concentration and small amount of hydrogen sulfide waste gas, which is commonly used Absorption method treatment; (2) waste gas produced by natural gas enterprises and petroleum refineries, hydrogen sulfide waste gas with high sulfur concentration and large total amount, mainly to recover sulfur, commonly used Claus method and absorption oxidation method to deal with; (3) metal Low-concentration hydrogen sulfide waste gas and medium-low concentration hyd...

Claims

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Application Information

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IPC IPC(8): C02F1/52B01D53/78B01D53/52C02F101/20C02F103/16
CPCB01D53/52B01D53/78C02F1/5236C02F1/5281C02F2101/20C02F2103/16
Inventor 熊明瑜蓝碧波黄怀国范红春张玲文黄中省罗增鑫谭希发何美丽刘晓英丘晓斌
Owner ZIJIN MINING GROUP
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