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Method for treating byproduct thiosulphate in organic amine doctor solution

A technology of thiosulfate and desulfurization liquid, which is applied in separation methods, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve the problem of high concentration of thiosulfate, and achieve the effect of simple operation and low loss

Active Publication Date: 2014-07-30
BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are many problems in the organic amine desulfurization process. For example, the concentration of thiosulfate radicals is too high due to incomplete analysis, which will decompose and produce elemental sulfur during the operation of the device to block the heat exchanger and other pipelines.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The mass fraction of thiosulfate in the desulfurization liquid to be treated is 0.93%, and it is analyzed with 100°C steam. When the concentration of thiosulfate reaches 0.61%, the desulfurized liquid after analytical treatment is passed through the filtration system in batches, and after filtering out elemental sulfur particles, it is sent to anion exchange resin for 12h of S 2 o 3 2- After desulfurization treatment, 10% fresh desulfurizer is mixed in. After filtration and anion exchange resin treatment again, S 2 o 3 2- The concentration is reduced to 0.1%, and the loss of desulfurization liquid is about 5%.

Embodiment 2

[0024] The mass fraction of thiosulfate in the desulfurizer to be treated is 1.93%, and it is analyzed with 115°C steam. The analysis time is 480 h, and a part of the thiosulfate is converted into elemental sulfur, which is initially reduced. When the concentration of thiosulfate reaches 1.01%, the desulfurizer after analysis and treatment is passed through the filtration system in batches to filter out elemental sulfur particles, and then sent to anion exchange resin for 18h S 2 o 3 2- After desulfurization treatment, 50% fresh desulfurizer is mixed in. After filtration and anion exchange resin treatment again, S 2 o 3 2- The concentration is reduced to 0.2%, and the desulfurization liquid loss is about 7.5%.

Embodiment 3

[0026] The mass fraction of thiosulfate in the desulfurizer to be treated is 0.53%, and it is analyzed with 100°C saturated humid air. The analysis time is 240 h, and a part of the thiosulfate is converted into elemental sulfur. Reduce the concentration of thiosulfate radicals to 0.31%, pass the desulfurizer after analysis and treatment through the filtration system in batches, and after filtering out elemental sulfur particles, send it to anion exchange resin for 12h S 2 o 3 2- After desulfurization treatment, mix with 30% fresh desulfurizer. After filtration and anion exchange resin treatment again, S 2 o 3 2- The concentration is reduced to 0.06%, and the desulfurization liquid loss is about 5.5%.

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Abstract

The invention discloses a method for treating a byproduct thiosulphate in an organic amine doctor solution. The method comprises the following steps: introducing a fluid heat source into a thiosulphate-containing amine solution in a system, analyzing, transforming one part of thiosulphate into an elemental sulfur, and primarily reducing the concentration of the thiosulphate; sending the analyzed amine solution in which elemental sulfur particles are filtered through a filtering system to anion exchange resin by batches, carrying out thiosulphate removing treatment for a certain period of time, then mixing a defined amount of fresh doctor solution, filtering and processing through an anion exchange resins system to ensure that the concentration of the thiosulphate is reduced to be within a normal range. The method has the characteristics of simplicity and convenience and rapidness in operation, and is capable of performing online treatment on the doctor solution in the system without being taken out from an operating system; meanwhile, the loss of a desulfurizing agent is low.

Description

technical field [0001] The invention relates to the technical field of environmental protection and industrial by-product control, in particular to a method for treating by-product thiosulfate in organic amine desulfurization liquid. Background technique [0002] Organic amine desulfurization is a new desulfurization process. Compared with the traditional limestone-gypsum wet technology, the advantages of organic amine desulfurization technology are mainly reflected in: the recovery and utilization of high-sulfur coal sulfur resources, and the solution to the problems of environmental protection and power generation in high-sulfur coal areas. Contradictions, avoiding excessive limestone mining, reducing the pressure of comprehensive utilization of gypsum, reducing CO2 emissions, etc. Among them, in order to recycle the sulfur resources in the flue gas, the organic amine desulfurization project generally builds a corresponding sulfuric acid production line, and the finished a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/73C02F9/10
Inventor 张启玖李敬东钟洪玲夏明游存芳刘更顺梅雪
Owner BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENG
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