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Method for producing manganese sulfate by removing high-concentration SO2 in flue gas by mass-separation and multi-point feeding method

A high-concentration sulfuric acid production technology, which is applied in the field of flue gas desulfurization to manganese sulfate and manganese sulfate preparation, achieves the effects of high desulfurization efficiency, high leaching rate and good application prospects

Active Publication Date: 2019-06-28
四川恒泰环境技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to: when the existing desulfurization and leaching manganese sulfate method is used for high-concentration sulfur dioxide treatment, the pH value of the slurry made of electrolytic anolyte and manganese ore is low, resulting in SO in the flue gas after the reaction. 2 It is a problem that needs to be further dealt with, and a separation and multi-point feeding method is provided to remove high-concentration SO in flue gas 2 Manganese Sulfate Manufacture Method

Method used

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  • Method for producing manganese sulfate by removing high-concentration SO2 in flue gas by mass-separation and multi-point feeding method
  • Method for producing manganese sulfate by removing high-concentration SO2 in flue gas by mass-separation and multi-point feeding method
  • Method for producing manganese sulfate by removing high-concentration SO2 in flue gas by mass-separation and multi-point feeding method

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Experimental program
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Effect test

Embodiment 1

[0051] As shown in the figure, in this embodiment, the first-stage reaction group, the intermediate-stage reaction group, and the latter-stage reaction group are connected in series in sequence. Among them, the post-stage reaction group is the first post-stage reactor, the mid-stage reaction group is formed by connecting the first mid-stage reactor, the second mid-stage reactor, and the third mid-stage reactor in series, and the pre-stage reaction group is the first pre-stage reaction device. In the first stage of reaction, the first manganese ore powder bin and the first slurry mixing tank are used to cooperate with each other to prepare a stage of manganese ore reaction slurry. In the second-stage reaction, the second manganese ore powder bin and the second slurry mixing tank are used to cooperate with each other to prepare the second-stage manganese ore reaction slurry.

[0052] Its reaction process is as follows.

[0053] Flue gas SO after electrostatic precipitator 2 T...

Embodiment 2

[0060] As shown in the figure, in this embodiment, the first-stage reaction group, the intermediate-stage reaction group, and the latter-stage reaction group are connected in series in sequence. Wherein, the rear-stage reaction group is formed by connecting the first post-stage reactor and the second post-stage reactor in series, the intermediate reaction group is the first intermediate reactor, and the front-stage reaction group is the first front-stage reactor. In the first stage of reaction, the first manganese ore powder bin and the first slurry mixing tank are used to cooperate with each other to prepare a stage of manganese ore reaction slurry. In the second-stage reaction, the first manganese ore powder bin and the second slurry mixing tank are used to cooperate with each other to prepare the second-stage manganese ore reaction slurry.

[0061] Its reaction process is as follows.

[0062] Flue gas SO after electrostatic precipitator 2 The content is 40000mg / m 3 , wit...

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Abstract

The invention discloses a method for preparing manganese sulfate with high-concentration SO2 by a graded multi-point feed method, and intends to solve the problem that SO2 in smoke after reaction hastoo high concentration and requires further treatment since the pH value of slurry prepared from anode electrolyte and manganese ore is acidic when the traditional method for preparing manganese sulfate by desulfurizing and manganese-leaching is used for treating high-concentration sulfur dioxide and the problem that manganous dithionate has relatively high content since the reacting pH value in the prior art is in a manganous dithionate generating area, and subsequent utilization of a manganese sulfate product is influenced. According to the method, the manganese ore is used as a desulfurizing absorbent, and is used for preparing slurry respectively with water and an acidic solution, the manganese slurry prepared from water is pumped into a post-stage reaction group by a pump, the manganese slurry prepared from the acidic solution is pumped into a medium-stage reaction group by a pump, and concentrated sulfuric acid is pumped into a forward-stage reaction group. Furthermore, the slurry and smoke run in countercurrent way, so that sulfur dioxide is removed, and manganese ore is leached. Detection proves that the desulfurizing efficiency is high and reaches more than 99.5 percent, SO2 concentration emitted from the outlet is low and can be less than 100mg / m<3>, the manganese leaching rate is high and can be more than 95 percent, and the manganous dithionate in the product is lowand can be less than 5g / L. The method has a remarkable progressive significance.

Description

technical field [0001] The invention relates to the field of manganese sulfate preparation, especially the field of manganese sulfate prepared from flue gas desulfurization, specifically the removal of high-concentration SO in flue gas by mass-separation and multi-point feeding method 2 Manganese Sulfate Method. The present invention is essentially a method for removing SO in flue gas 2 The method for preparing manganese sulfate has high desulfurization rate and leaching rate, and the prepared manganese sulfate solution contains low content of manganese dithionite, which can meet the subsequent electrolysis requirements of manganese sulfate, that is, provide a smoke removal SO in air 2 A method for preparing manganese sulfate solution with low content of manganese dithionate. Background technique [0002] Manganese ore includes pyrolusite, rhodochrosite, brown manganese ore, manganese ore, etc. Among them, the main component of rhodochrosite is MnCO 3 , the main componen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G45/10B01D53/50B01D53/80
CPCB01D53/507B01D53/80B01D2251/602C01G45/10C01P2006/80
Inventor 黄文凤孙冬任岷
Owner 四川恒泰环境技术有限责任公司
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