Resin bed thermal stabilization salt removing method

A heat-stable salt and resin bed technology, applied in chemical instruments and methods, ion exchange regeneration, ion exchange water/sewage treatment, etc., can solve the problem of large waste liquid discharge, large consumption of regenerant, and large consumption of flushing water and other problems, to achieve the effect of less waste liquid discharge, less flushing water consumption and high utilization rate

Active Publication Date: 2016-03-02
LUOYANG PETROCHEMICAL ENG CORP SINOPEC +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0008] The present invention aims to provide a new resin for the disadvantages of large regenerant consumption, large flushing water consumption, and large amount of waste liquid in the existing technology of using anion exchange resin to remove heat-stable salts in amine absorbents. bed exchange-regeneration process

Method used

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  • Resin bed thermal stabilization salt removing method
  • Resin bed thermal stabilization salt removing method
  • Resin bed thermal stabilization salt removing method

Examples

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Embodiment Construction

[0035] Renewable organic amine wet flue gas desulfurization device is equipped with a set of thermally stable salt removal device, and the designed resin loading capacity is 1m 3 , heat stable salt removal capacity not less than 300kgSO 4 2- / sky.

[0036] The heat-stable salt removal device control system adopts remote DCS automatic control, the exchange-regeneration cycle is 1 hour, and the operation is not less than 10 cycles per day. A description of the complete workflow per cycle of the thermally stable salt removal unit (see figure 1 )as follows:

[0037] 1) After the control program is started, the system checks itself. At this time, all the automatic control valves, that is, the first valve 9 to the seventeenth valve 25, are in the closed state, the amine liquid pump 6 and the lye pump 7 are in the closed state, and each material storage tank After the liquid level meets the conditions, enter the next step;

[0038] 2) Resin bed purging and emptying step (purge a...

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Abstract

The invention discloses a resin bed thermal stabilization salt removing technology to overcome the defects that regenerant consumption is large, washing water consumption is large and drained waste liquid amount is large in the prior art. The method comprises the steps of resin bed purging and emptying (through purging amine), resin bed preregeneration, resin bed regeneration, alkali recovery, recycle washing after regeneration, deep washing after regeneration, resin bed purging and emptying (through purging alkali), thermal stabilization salt removal, amine-containing water washing, lateral line extraction and washing and amine recovery. By the adoption of the technology, the good resin exchange, regeneration and washing effects can be obtained through a small amount of washing water and regeneration agent, so that according to the resin bed device, the consumption of the regeneration agent and salt removing water is reduced, and the drained waste liquid amount is greatly reduced.

Description

technical field [0001] The invention belongs to a method for regenerating an amine absorbent for purifying acid gas pollutants, and relates to a method for removing heat-stable salts in desulfurization amine liquid. Background technique [0002] Aqueous solutions of basic compounds such as organic amines are widely used in acidic gases (H 2 S, CO 2 , SO 2 etc.) removal and recovery. The principle is that the low-concentration acid gas contacts with the lye to generate organic ammonium salts that can be decomposed to form a rich solution, which is then heated and decomposed in the desorption tower to release high-concentration acid gas for recycling, and at the same time the amine solution is converted into lean liquid, the regenerated amine liquid can be reused. [0003] During the periodic absorption and desorption process, on the one hand, the amine liquid itself will be oxidized and degraded to form organic acid radicals such as formate, oxalate, acetate, and thiocyan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/42B01J49/00
Inventor 李朝恒陈卫红裴旭东王秀珍涂先红郭荣群郭玉涛张凡叶春波
Owner LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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