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Method for separation and regeneration of anion and cation resin in exhausted mixed bed

A technology of anion-yang resin and mixed bed, which is applied in the field of separation and regeneration of anion-yang resin, can solve the problems of poor separation effect, large water and alkali consumption, and achieve the effects of preventing resin clustering, saving time, and simple process operation

Active Publication Date: 2013-11-27
兰州陇能电力科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention overcomes the defects of large water and alkali consumption and poor separation effect in the prior art, and provides a method for separation and regeneration of anion and yang resins with good separation effect and simple operation

Method used

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  • Method for separation and regeneration of anion and cation resin in exhausted mixed bed

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Experimental program
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Effect test

Embodiment 1

[0020] The method for regeneration and separation of anion and yang resins in an invalid mixed bed, the steps are as follows:

[0021] a) Drainage: open the exhaust valve 3 and the bottom drain valve 6, drain the water in the mixed bed, and close all the above valves. b) Separation: open the desalted water outlet valve 13, the mixed bed acid inlet valve 7, the backwash drain valve 1, and then start the desalted water pump e in sequence (the desalted water pump e is connected to the desalted water tank a through the desalted water outlet valve 13), Acid metering box outlet valve 12, adjust acid injector c (acid injector c is connected to acid metering box b through acid metering box outlet valve 12) outlet hydrochloric acid solution concentration range is 4%, control flow rate is 10t / h, continue to add Hydrochloric acid solution for 12 minutes (that is, the rinsing time), in order to rinse and separate the anion and cation resins in the mixed bed g. c) Drainage: open the exhau...

Embodiment 2

[0024] Under the situation that separation step is identical with embodiment 1, concrete operation parameter is:

[0025] b) Separation: hydrochloric acid solution with a concentration range of 2%, the control flow rate is 13t / h, and the rinsing time is 20 minutes. e) Regeneration: NaOH alkali solution with a concentration range of 2%, hydrochloric acid solution with a concentration range of 2%, and the time is 50 minutes.

Embodiment 3

[0027] Under the situation that separation step is identical with embodiment 1, concrete operation parameter is:

[0028] b) Separation: hydrochloric acid solution with a concentration range of 5%, the control flow rate is 7t / h, and the rinsing time is 5 minutes. e) Regeneration: NaOH alkali solution with a concentration range of 4%, hydrochloric acid solution with a concentration range of 5%, and the time is 40 minutes.

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Abstract

The invention discloses a method for the separation and regeneration of anion and cation resin in an exhausted mixed bed, comprising the steps of separation, regeneration, displacement, mixing, and washing, wherein the separation step is characterized by continuously adding a hydrochloric acid solution having a concentration range of 2-5 %, the maintenance time is 5-20 min, so that the mixed bed anion and cation resin is rinsed and separated. According to the invention, the hydrochloric acid solution is directly used for rinsing and separating the mixed bed resin, thus a immersion, backwashing and separation method in the prior art is replaced, and the advantages of simple operation and time saving performance are achieved. The hydrochloric acid solution in the separation process can effectively prevent the generation of colloids and static attraction of the anion and cation resin, prevent the resin from agglomerating, guarantee the separation effect of the resin, and regenerate the cation resin.

Description

technical field [0001] The invention discloses a method for separating and regenerating anion and cation resins in an invalid mixed bed in the water treatment process of a power plant. Background technique [0002] Thermal power plants absorb the heat generated by coal combustion through water to form steam to drive the turbine to rotate, thereby driving the generator to generate electricity. Water plays the role of heat transfer in thermal power plants. In order to ensure the quality of boiler water and steam, the quality of boiler water feed water generally requires conductivity less than 0.15 μs / cm, pH 8.8-9.3, silicon less than 20 μg / L, and sodium less than 5 μg / L. Based on the above requirements, most of the water treatment of high-parameter power plants is equipped with a mixed bed of secondary desalination equipment, and its normal water quality can meet the above requirements. [0003] The mixed bed is an ion exchanger for further desalination in water treatment. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J49/00B01J47/04C02F1/42B01J49/09
Inventor 李铁琦张振达
Owner 兰州陇能电力科技有限公司
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