CN1284733C

CN1284733C - Method for circular regeneration of demineralized water

Info

Publication number: CN1284733C
Application number: CN02128961.1A
Authority: CN
Inventors: 郭新洪
Original assignee: Individual
Current assignee: Beijing Tianhong Polytron Technologies Inc
Priority date: 2002-08-23
Filing date: 2002-08-23
Publication date: 2006-11-15
Anticipated expiration: 2022-08-23
Also published as: CN1477062A

Abstract

The present invention relates to a method for circular regeneration during demineralizing water by an ion-exchange method, particularly to a method for full-automatic intelligent-control circular regeneration, which comprises five steps of back washing, liquid absorption, exchange, rinsing and water replenishment. The method is characterized in that the method improves the shortage that the present ion-exchange regenerating system depends on water flows to form negative-pressure liquid absorption when working, the exchange process is divided into two independent programs of liquid absorption and exchange so that sodium ions and calcium-magnesium plasma are sufficiently exchanged, and therefore, the method enhances the efficiency of water quality optimization and saves the consumption of water and salt. The method has the advantages of compact structure, small volume and good reliability and is mainly suitable for household equipment.

Description

A kind of method of cyclic regeneration of demineralized water

Technical field

The invention belongs to a kind of softening installation of Drinking Water, especially softening and can regenerate the water softening device that recycles automatically with ion exchange method.

Background technology

Hardness of drinking water is too high, can produce detrimentally affect to the systems such as digestion circulation of human body, and can fouling in kettle and water-heater, influences its use.Along with the increase of population, the urban life hardness of drinking water is more and more higher, compares with 85 years national standards with 59 years national standards of tap water, and tap water hardness has risen to the 450mg/L in 85 years from 250mg/L, and hardness standard has risen 80%.And the tap water hardness of world health organisation recommendations is 100mg/L.This shows that tap water was necessary to soften processing before drinking.At present, methods such as medical method, electroosmose process and reverse osmosis method are arranged both at home and abroad for water purifying means.Medical method is directly dosing in tank, and capital cost and running cost are low, and power consumption is little, but labour intensity is big and can only dispel temporary hardness; Purifying waste water with the electrolysis method is the selection perviousness of utilizing ion-exchange membrane, and the calcium ions and magnesium ions in the water is cemented out; The refining plant of reverse osmosis method is to establish a semi-permeable membranes in device, add than the higher pressure of naturally osmotic pressure on one side of solution, to reverse the method for naturally osmotic, the solvent of strong solution is pressed onto in the dilute solution of the other side of semi-permeable membranes, play filtering effect.Is the difference separate equipment and utilize these three kinds of methods for the purification and the remollescent device of Drinking Water, and flow is little, and operation and complex disposal process.The domestic and international at present device regeneration step for the ion exchange method softening water is generally backwash, exchange and is just washing.Adopt this method and rely on current to form negative pressure and when drawing solution regeneration system as regenerator, in exchange process, wasted a large amount of water and salt, and the resin cation (R.C.) regeneration effect is insufficient if be applied in.

Summary of the invention

The present invention has improved a kind of method that adopts ion exchange method softening water cyclic regeneration, and if the device that makes softening water is can be more rational above-mentioned ion exchange system is saturated after, water saving, economize the cyclic regeneration of energy.Improved method is as follows:

(1) backwash: under the automatic control of controller, combined valve is opened tap water and is entered from the bottom of ion-exchanger, makes resin cation (R.C.) loosening, the dirt settling on the flushing resin, and it is discharged from sewage draining exit.Enter next imbibition program then.

(2) imbibition: under the automatic control of controller, combined valve is opened, and the negative pressure that relies on current to form extracts regenerated liquid and enters ion-exchanger from the regeneration flow container, resin cation (R.C.) is soaked.Enter next exchanger then.

(3) exchange: under the automatic control of controller, combined valve is closed and is continued for some time, and makes sodium ion and calcium ions and magnesium ions carry out cmpletely exchange at the appointed time.

(4) just wash: under the automatic control of controller, the mouth of just washing of combined valve is opened tap water and is entered in the ion-exchanger calcium ions and magnesium ions solution and regeneration soln are discharged from sewage draining exit.

(5) moisturizing: under the automatic control of controller, the combined valve water supplement port is opened tap water and is entered in the regeneration flow container, with dissolving part crude salt, uses controller to regulate the height of liquid level when regenerating next time.

This method improvement present ion exchange method when regeneration system rapidly relies on current to form negative pressure when drawing regenerated liquid deficiency, common single exchange process is passed through research, take technique means first, this one step is decomposed into imbibition and exchanges two independently programs.Improved the usefulness of demineralized water like this in a large amount of water savings, province's salt, made ion-exchange more abundant, level of automation is higher.

Description of drawings

Fig. 1 is the state graph that water softening device carries out backwash.

Fig. 2 is the state graph that water softening device carries out imbibition.

Fig. 3 is the state graph that water softening device exchanges.

Fig. 4 is the state graph that water softening device is just being washed.

Fig. 5 is the state graph that water softening device carries out moisturizing.

Claims

1, a kind of method of cyclic regeneration of demineralized water is characterized in that this method comprises the following steps:

(1) backwash: under the automatic control of controller, combined valve is opened tap water and is entered from the bottom of ion-exchanger, makes resin cation (R.C.) loosening, the dirt settling on the flushing resin, and it is discharged from sewage draining exit, enter next imbibition program then;

(2) imbibition: under the automatic control of controller, combined valve is opened, and the negative pressure that relies on current to form extracts regenerated liquid and enters ion-exchanger from the regeneration flow container, resin cation (R.C.) is soaked, and enters next exchanger then;

(3) exchange: under the automatic control of controller, combined valve is closed and is continued for some time, and makes sodium ion and calcium ions and magnesium ions carry out cmpletely exchange at the appointed time;

(4) just wash: under the automatic control of controller, the mouth of just washing of combined valve is opened tap water and is entered in the ion-exchanger calcium ions and magnesium ions solution and regeneration soln are discharged from sewage draining exit;