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A kind of resin bed thermally stable salt removal method

A technology for thermally stabilizing salt and resin beds, applied in chemical instruments and methods, ion exchange regeneration, ion exchange, etc., can solve the problems of large consumption of regenerant, large amount of waste liquid discharged, and large consumption of flushing water, etc. The effect of less flushing water, less waste liquid, and high utilization rate

Active Publication Date: 2018-02-16
SINOPEC LUOYANG PETROCHEM ENG CORP +1
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  • Description
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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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  • A kind of resin bed thermally stable salt removal method
  • A kind of resin bed thermally stable salt removal method
  • A kind of resin bed thermally stable salt removal 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 heat-stable salt removal process of a resin bed to solve the shortcomings of the prior art, such as large consumption of regeneration agent, large consumption of flushing water, and large amount of waste liquid discharged out. The steps include a resin bed purging and emptying step (purge amine), a resin bed pre-regeneration step, a resin bed regeneration step, an alkali recovery step, a post-regeneration cycle flushing step, a post-regeneration deep flushing step, and a resin bed purging and emptying step (alkali purge), thermally stable salt removal step, amine-containing water rinse step, side draw water rinse step, and amine recovery step. Using the process of the present invention requires less flushing water and regenerant to obtain good resin exchange, regeneration and flushing effects, so the consumption of regenerant and desalted water in the resin bed device is reduced, and the amount of waste liquid discharged outside 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 a 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 thiocy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J49/75B01J49/50B01J49/00
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 SINOPEC LUOYANG PETROCHEM ENG CORP
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