CN1045360A

CN1045360A - The renovation process of pure water preparation intermediate ion exchange resin

Info

Publication number: CN1045360A
Application number: CN89101308A
Authority: CN
Inventors: 邹萃林
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-03-09
Filing date: 1989-03-09
Publication date: 1990-09-19
Anticipated expiration: 2004-03-09
Also published as: CN1038482C

Abstract

The renovation process of pure water preparation intermediate ion exchange resin belongs to the technology of ion-exchange system pure water, and it is a kind of easy and simple to handle that purpose is to provide, and can in time eliminate resin and poison, and regeneration thoroughly prolongs the renovation process in system water cycle.The present invention adopts exchange column is connected, eliminated with salt acid soak resin and poison, and the measures such as " shake, strike, put " of employing drains bubble, and dual-purpose conventional regeneration method, reaches the measures such as abandoning broken resin of washing in a pan with the alcohol washing where necessary, can make resin regeneration thorough.The pure water quality of utilizing method of the present invention to make is good, the qualified pure water output of every exchange cycle height, and regenerative operation is simple, and the efficient height also can directly use the bronsted lowry acids and bases bronsted lowry of commercial grade.

Description

The renovation process of pure water preparation intermediate ion exchange resin

The present invention relates to prepare the technology of pure water, specifically, relate to the renovation process of pure water preparation intermediate ion exchange resin with ion exchange method.

As everyone knows, ion exchange method prepares inefficacy and the regenerative process that pure water must have an ion exchange resin, this is that ion exchange resin is progressively replaced by the yin, yang ion in the water and lost efficacy because in the process of exchange system water, must could prepare qualified pure water through regeneration.Chang Yong renovation process (for example " 70 type ion-exchange water purifying apparatus " working instructions of Nanhua, Shanghai apparatus factory production are contained) all is that process is to after the resin back washing up to now, the sun resin is regenerated with hydrochloric acid soln, negative resin is regenerated with sodium hydroxide solution, respectively above-mentioned two kinds of resins are carried out can dropping into the next exchange system water cycle after the drip washing with the deionized water of capacity or distilled water again.The shortcoming of the renovation process of this routine is: (1) regenerative operation trouble, must regenerate one by one to each exchange column respectively; (2) recovery time long, " 70 type " ion-exchange water purifying apparatus of producing with Shanghai is an example, one of every regeneration needs a daylong time of people; (3) regeneration of resin is not thorough, " poisoning " phenomenon that resin often occurs, cause the ability of exchange system water to weaken gradually, the purity of pure water (to represent than resistance) descends gradually, the amount for preparing pure water reduces gradually phase weekly, system water and regenerated cycle shorten gradually, even can not prepare qualified pure water " scrapping ", its rescue method is too complicated again.

The object of the present invention is to provide a kind ofly in pure water preparation, can overcome above-mentioned shortcoming, easy and simple to handle, can in time eliminate resin and poison, regeneration thoroughly prolongs the system water cycle, can improve the purity of preparation pure water and the regeneration of ion-exchange resin method of output.

The contriver finds after deliberation, resin commonly used is cinnamic superpolymer, spherical porous, the reason that resin poisons is because its hole is stopped up by the carbonate of calcium, magnesium, oxyhydroxide and organism and sodium salt thereof etc., conventional renovation process is difficult to eliminate the obstruction of these materials, causes regeneration not exclusively.Therefore, to achieve the above object of the invention, the present invention has taked the measure of following intensifying regenerating: (1) each positive and negative resin-column does not adopt single regeneration and adopts the series connection regeneration to simplify the operation; When (2) regenerating, all to flow directly into negative resin at every turn, make negative resin, also just eliminate poisoning of resin through soaking with eliminations such as the carbonate of calcium, magnesium, oxyhydroxide in order to the acid of the positive resin of regenerating; (3) when using acid soak, the bubble that produces in the resin voids (acting on the carbon dioxide that generates) as carbonate and acid, adopt the shaking resin-column, knock alveolate position, " shake, strike, put " method of opening the venting of venting stopple drains, because bubble is got rid of, the recoil program in the conventional regeneration method generally can be removed from.

In order to simplify the operation, to increase work efficiency, the contriver adopts flexible rubber hose that the placed in-line method of each resin-column is regenerated; With acid to resin soaking, when regenerate, should be according to passing through earlier positive resin, after through the order of negative resin; Negative resin being soaked, the flexible pipe that connects positive resin should be taken apart when regenerating, positive resin-column is broken away from, only with each negative resin exchange column series connection with alkali.

The acid of adopting among the present invention is hydrochloric acid normally, and for reducing the acid consumption, each regeneration should be used the hydrochloric acid of new preparation more earlier with the old acid of recovery last time; For improving regeneration efficiency, adopt 8% with acid concentration, a little more than conventional method; In like manner, to the regeneration of negative resin, also earlier using new alkali lye again with old alkali lye, is 9% with alkali concn, slightly high than conventional method.

For making regeneration fully, acid, alkali need be soaked the resin regular hour usually, can determine the length of soak time as required, need usually to soak 0.5～24 hour.

The contriver also adopts hook to hang the method for ion-exchange water purifying apparatus, has simplified schedule of operation greatly, a people five " 70 type " water purifiors of can regenerating simultaneously.If the soda acid soak time is about 1 hour, then a people can finish the regeneration of five water purifiors in one day.

Adopt this law regenerated ion exchange resin, the pure water quality that makes is good, survey its dynamic pure water with digital multimeter, can reach 1800 * 10 than resistance ⁴Ω Cm; The exchange flow velocity was fast when pure water was made, the highest aquifer yield can reach the 100-120 litre/hour, double approximately than the flow velocity of ordinary method; The qualified pure water output of each exchange cycle is also high by about 50% than conventional method, the water source than resistance 2000 Ω Cm conditions under, output can reach 400 kilograms.And can directly use acid, the alkali of commercial grade.Thereby than having reduced cost with chemical pure acid, alkali.

Accompanying drawing 1 is the series system synoptic diagram of each exchange column when using acid soak, regeneration, and accompanying drawing 2 is with the alkali immersion, when regenerating, the series system synoptic diagram of each exchange column.1 is sour header tank among the figure; 2,5 is positive resin-column; 3,4,6,7 is the negative resin exchange column; 8 is the alkali header tank.

Embodiment: " 70 type " ion-exchange water purifying apparatus is regenerated.

Step is as follows: (1) is suspended on five water purifiors respectively on five hooks with plastic rope; (2) take over flexible rubber hose by accompanying drawing 1 mode for every, it is 1-2-5-3-4-6-7 in proper order, with the old hydrochloric acid 6000-8000 milliliter that last time reclaims each exchange column of flowing through; The bubble that produces drains with the method for shaking, beat and open the venting stopple; Treat that effusive acid solution clarification promptly begins to reclaim old acid, muddy spent acid discards after handling with the waste lye neutralizing treatment or with liming; Slowly flow to and give the 8% hydrochloric acid soln 4000-5000 milliliter that is made into earlier, flow velocity is the 50-100 ml/min, soaks 0.5-24 hour; (3) flow to after pure water replaces acid solution and reclaim, wash till the pH=4-5, the washing water flow velocity is the 200-250 ml/min; (4) take over again with flexible rubber hose by accompanying drawing 2 modes for every, it is 8-3-4-6-7 in proper order, imports and exports sebific ducts with 2,5 and removes, with 5000 milliliters of each exchange columns of flowing through of sodium hydroxide solution that last time reclaimed; Slowly flow to then and give the 9% sodium hydroxide solution 4000-5000 milliliter that is made into earlier.Flow velocity is that 50-100 ml/min, alkali lye flow into back immersion 0.5-24 hour; (5) dipping by lye finishes, pure water is taken over, fed to each exchange column again by Fig. 1 pipe-connecting mode reclaims old alkali, washs till the pH=7; (6) regeneration finishes, each exchange column is recovered conventional pipe-connecting mode; 2-3-4-5-6-7, to prepare water.

Claims

1, respectively cationic, anionic exchange resin is washed with back washing, employing acid again, alkali earlier in the pure water preparation, use deionized water wash regeneration of resin method at last, feature of the present invention comprises:

(1) each positive and negative resin-column series connection is regenerated;

Acid in order to the positive resin of regenerating at every turn when (2) regenerating all will flow directly into the negative resin exchange column, this resin is eliminated through immersion poisoned;

(3) with after the acid soak, the bubble that negative resin produces drains with methods such as " shake, strike, put ".

2, in accordance with the method for claim 1, it is characterized in that adopting acid to the positive and negative resin soak, during regeneration, should be according to earlier through positive resin, after through the order of negative resin, series connection is regenerated.

3, in accordance with the method for claim 1, it is characterized in that adopting alkali that negative resin is soaked, when regenerating, positive resin-column broken away from, only with each negative resin exchange column series connection.

4, according to claim 1 or 2 described methods, it is characterized in that normally hydrochloric acid of used acid, earlier with the old acid regeneration that reclaims, the back is with 8% salt acid soak, regeneration of new preparation.

5,, it is characterized in that used alkali is generally sodium hydroxide, earlier with the old alkali liquid washing negative resin that reclaims, again with 9% alkali liquid washing, regeneration of new preparation according to claim 1 or 3 described methods.

6, in accordance with the method for claim 1, it is characterized in that be 0.5-24 hour with eo-acid, alkali to the time that resin soaks.