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A kind of recovery method of anion and cation resin
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A technology of cation resin and anion resin, which is applied in the field of anion and cation resin recovery, to achieve the effects of improving work efficiency, reducing acid and alkali consumption, and saving costs
Active Publication Date: 2022-04-22
JIANGXI JINGHAO SALINIZATION
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Problems solved by technology
[0005] At the problems referred to above, the purpose of this invention is to provide a kind of anion, cationic resin recovery method, to solve the recovery problem of the ionic resin of boiler water pollution
Method used
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Embodiment 1
[0032] A kind of anion resin recovery method, comprises the following steps:
[0033] (1) The first stage: open the large backwash water inlet valve and backwash drain valve, perform large backwash for 30-40 minutes, drain until clear, add regenerant, soak for 12 hours, backwash and drain until clear and transparent, and perform large backwash After washing, close the backwash inlet valve and backwash drain valve;
[0034] Wherein, the regeneration agent described in the step (1) is NaOH solution with a mass fraction of 8%, the flow rate is 25T / h, the height of the regeneration agent is 2.5 meters, and the time is 60 minutes.
[0035] Among them, the backwash drainage conductivity is 5μs / cm, the silica content is 100ug / L, and the pH is 9.
[0036] (2) The second stage: Open the small backwash water inlet valve and backwash drain valve, perform small backwash for 15-20min, drain until clear, add regenerant, soak for 12h, backwash and drain until clear, small backwash After wa...
Embodiment 2
[0046] A cationic resin recovery method, comprising the following steps:
[0047] (1) The first stage: open the large backwash water inlet valve and backwash drain valve, perform large backwash for 30-40 minutes, drain until clear, add regenerant, soak for 12 hours, backwash and drain until clear and transparent, and perform large backwash After washing, close the backwash inlet valve and backwash drain valve;
[0048] Wherein, the regeneration agent described in the step (1) is an HCl solution with a mass fraction of 8%, the flow rate is 25T / h, the height of the regeneration agent is 2.5 meters, and the time is 60 minutes.
[0049] Among them, backwashing the drainage until it is clear and transparent specifically means that the hardness of the backwashing drainage is ≤0mmol / L, the sodium content is 95ug / L, and the pH is 3.
[0050] (2) The second stage: Open the small backwash water inlet valve and backwash drain valve, perform small backwash for 15-20min, drain until clear...
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Abstract
The invention provides an anion and cation resin recovery method, including an anion resin recovery method and a cation resin recovery method. The specific steps include: (1) the first stage: large backwash, adding a regenerant, soaking, and cleaning; (2) the first stage Second stage: small backwash, adding regenerant, soaking, cleaning; (3) third stage: small backwash, adding regenerant, soaking, cleaning; (4) fourth stage: small backwash, adding regenerant, cleaning put into operation immediately. The regeneration agent is acid and alkali alternately used; the operation period of the anion resin after recovery by the recovery method of the present invention is extended from an average of 1.5 days to an average of 5 days; the water production rate is improved, and the consumption of acid and alkali is reduced compared with the conventional acid-base recovery method, It saves costs; reduces the labor intensity of employees and improves work efficiency.
Description
technical field [0001] The invention relates to the field of resin recovery, in particular to a recovery method for anion and cation resins. Background technique [0002] Ion exchange water treatment technology is currently the most common water purification technology used in the fields of electric power, petrochemical, chemical, metallurgy, and electronics. During the operation of the ion exchanger, the ion exchange resin will be polluted by the impurities in the water. [0003] Boiler water contains various impurities, mainly various salts, including calcium salts, magnesium salts, iron salts, etc., as well as suspended solids and colloids. The exchange capacity of the ion exchange resin in the water treatment system is continuously declining, the operating cycle is significantly reduced, and even drops to less than one-third in serious cases, the quality of the effluent water is gradually deteriorating, the consumption of acid and alkali and the amount of cleaning water...
Claims
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