Method for absorbing and purifying hydrogen sulfide with EDTA (ethylene diamine tetraacetic acid) chelated iron copper compound system

A technology for chelating iron and hydrogen sulfide, which is applied in chemical instruments and methods, separation methods, and separation of dispersed particles. It can solve the problems of oxidative degradation of complexing agents, difficult regeneration of desulfurization agents, and low sulfur recovery rate, and achieve regeneration rates. High and stable removal efficiency, low cost of absorption solution

Inactive Publication Date: 2012-09-12
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dry desulfurization efficiency is not high, the regeneration of desulfurizer is difficult, and the sulfur capacity is relatively low. It is mainly suitable for fine desulfurization
The wet desulfurization process has large processing capacity, high desulfurization efficiency, and continuous operation, but the investment and operation costs are high, which is difficult for ordinary manufacturers to bear
In the new proces...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] According to the method of the present invention, first prepare the ferric chloride solution that concentration is 1%, then make iron salt, copper salt, EDTA disodium salt mass ratio and be the EDTA chelated iron-copper composite absorption liquid of 1:1:1, The hydrogen sulfide gas concentration to be treated is 800ppm~4000ppm. After 8 hours of reaction at room temperature, when the hydrogen sulfide gas concentration is 800ppm, the outlet concentration is 54.4ppm, and the removal rate is 93.2%; when the hydrogen sulfide gas concentration is 2000ppm, the outlet concentration is 218ppm, and the removal rate is 89.1%; When the hydrogen sulfide gas concentration is 4000ppm, the outlet concentration is 596ppm, and the removal rate is 85.1%.

Embodiment 2

[0025] According to the above-mentioned preparation method, first prepare the ferric chloride solution that concentration is 1%, then make iron salt: copper salt: EDTA disodium salt mass ratio is 4:1:1 EDTA chelated iron-copper composite absorption liquid, The treated hydrogen sulfide concentration is 800ppm~4000ppm. After 8 hours of reaction at normal temperature, when the hydrogen sulfide gas concentration was 800ppm, the outlet concentration was 28ppm, and the removal rate was 96.5%; when the hydrogen sulfide gas concentration was 2000ppm, the outlet concentration was 98ppm, and the removal rate was 95.1%; When the hydrogen sulfide gas concentration is 4000ppm, the outlet concentration is 500ppm, and the removal rate is 87.5%.

Embodiment 3

[0027] According to the above-mentioned preparation method, first prepare the ferric nitrate solution that concentration is 1%, then make iron salt: copper salt: EDTA disodium salt mass ratio is 5:1:1 EDTA chelated iron-copper composite absorption liquid, treated The concentration of hydrogen sulfide is 800ppm~4000ppm. After 8 hours of reaction at room temperature, when the hydrogen sulfide gas concentration is 800ppm, the outlet concentration is 36.8ppm, and the removal rate is 95.4%; when the hydrogen sulfide gas concentration is 2000ppm, the outlet concentration is 218ppm, and the removal rate is 89.1%; When the hydrogen sulfide gas concentration is 4000ppm, the outlet concentration is 500ppm, and the removal rate is 87.5%.

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Abstract

The invention relates to a method for absorbing and purifying hydrogen sulfide with an EDTA (ethylene diamine tetraacetic acid) chelated iron copper compound system, which comprises the following steps: dissolving 1-10wt% of soluble iron salt in deionized water to prepare an iron salt solution; adding soluble copper salt and EDTA disodium salt into the iron salt solution in an iron salt/copper salt/EDTA disodium salt mass ratio of (1-5):1:1, thereby obtaining an EDTA chelated iron copper compound absorption solution; and introducing hydrogen sulfide gas with the concentration of 800-4000ppm to carry out absorption reaction. The method provided by the invention has the advantages of high removal efficiency, mild reaction conditions, low absorption solution cost, low raw material consumption, wide application range and the like, and is simple to operate.

Description

technical field [0001] The invention belongs to the technical field of atmospheric treatment, and in particular relates to a method for absorbing and purifying hydrogen sulfide by using an EDTA chelated iron-copper composite system. Background technique [0002] Currently, hydrogen sulfide (H 2 S) As one of the main components of malodorous gas, it mainly comes from the production process of petrochemical industry, natural gas industry, metallurgy industry, sulfuric acid manufacturing industry, garbage treatment plant and mineral processing industry. h 2 The existence of S will not only cause corrosion of equipment and pipelines, poisoning of catalysts, but also directly endanger human health and even life. [0003] Internationally for H 2 Research on S processing technology is very active. At present, desulfurization technology at home and abroad is relatively mature, and there are many desulfurization methods and desulfurization processes, mainly including dry method a...

Claims

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Application Information

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IPC IPC(8): B01D53/18B01D53/78B01D53/52
Inventor 赵文霞郭斌朱金仓任爱玲杜昭韩静段二红
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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