A kind of industrial soft water acid-alkali regeneration liquid recycling method and deviceTechnical field
The invention belongs to waste water to recycle technical field, is related to the side that a kind of industrial soft water acid-alkali regeneration liquid recyclesMethod, further relates to a kind of industrial soft water acid-alkali regeneration liquid recycling plant.
Background technology
Produce industrial soft water water and use ion-exchanger floating bed technique, which needs to make in the process of runningWith a large amount of acid, lye.At the same time because water preparation process equipment yin, yang bed is different service cycle, acid, alkali waste water discharge capacity and discharge cycleDifference, acid waste water is on the high side, and alkaline waste water is on the low side；Discharged after being neutralized in technique using neutralization pond acid, alkali waste water, but due to acidityWater yield is big compared with alkaline water yield, therefore still needs to use acid water in a certain amount of liquid caustic soda and unnecessary, can just make all acidProperty waste water obtains qualified discharge.Secondly：After water bed failure processed, regenerated using acid, alkali, also containing big in the waste water produced after regenerationUnreacted bronsted lowry acids and bases bronsted lowry is measured, causes a certain amount of acid, alkali material waste.
The content of the invention
The purpose of the present invention is big to solve acid, quantity of alkali consumption in industrial soft water ion exchange water preparation process；Acid, alkali waste waterQualified discharge fails to make full use of acid, alkali material；Acid, alkali waste water discharge costs are high；Provide a kind of industrial soft water acid, alkali regenerationThe method and device that liquid recycles.
To achieve these goals, the technical solution adopted by the present invention is as follows：
A kind of industrial soft water acid-alkali regeneration liquid recycling plant, including existing following equipment：Acid, alkali storage tank pass through pipeline pointIt is not connected with acid, alkali injector；Acid, alkali injector are connected with cation bed and anion bed respectively；Cation bed and anion bed outlet difference connecting tubeRoad；Desalination water tank is connected to acid, alkali injector by regeneration pump respectively；
It is characterized in that using following equipment：
Acid, alkaline regeneration solution accumulator tank are connected by acid, alkali regeneration pump with acid, alkali injector respectively；Cation bed, anion bed outlet conduit pointAcid, alkaline regeneration solution precipitation tank are not connected to by acid, alkali collection geosyncline respectively again；Acid, alkaline regeneration solution precipitation tank pass through acid, alkali respectivelyActive carbon filter is connected to acid, alkaline regeneration solution accumulator tank respectively again.
A kind of industrial soft water acid-alkali regeneration liquid recycling method, it is characterised in that comprise the following steps：
1. concentration is that 30% hydrochloric acid and liquid caustic soda are mixed by acid, alkali injector and demineralized water respectively in acid, alkali storage tank, prepareIt is respectively 3%, 5% acid, lye into concentration, sequentially enters cation bed or anion bed is regenerated, by controlling regenerated liquid outletWater outlet size adjusts Regenerative beds flow, and control cation bed, anion bed recovery time are respectively 45min, 90min, go out from cation bed, anion bedAcid, the alkaline regeneration solution come respectively enters acid, alkali collection geosyncline, and acid, the acid in alkali collection geosyncline, alkaline regeneration solution are in acid, alkali geosynclineUnder pumping action acid, alkaline regeneration solution precipitation tank are respectively enterd through pipeline；
2. adding flocculation medicament aluminium polychloride to acid, alkaline regeneration solution precipitation tank respectively, regenerated liquid is controlled：Aluminium polychloride qualityThan for 1：0.03, by flocculating, medicament aluminium polychloride respectively flocculates the foreign matter and soil mixed in acid, alkaline regeneration solutionPrecipitation, settling ratio start blowdown when being 50%, control its turbidity below 10 degree, and purified acid, alkaline regeneration solution are fed separately toAcid, basic active carbon filter are filtered, and remove calcium ions and magnesium ions, chlorion, jelly in deacidification, alkaline regeneration solution, then will filteringAcid, alkali filtered fluid afterwards is fed separately to acid, alkaline regeneration solution accumulator tank；
3. when regenerating cation bed and anion bed again, acid in acid, alkaline regeneration solution accumulator tank need to be only adjusted respectively according to normal stepRegeneration solution concentration is 0.5%, alkaline regeneration solution concentration is 1%, replaces demineralized water with acid, alkaline regeneration solution respectively, passes through acid, alkali injectorAdjust the liquid-tight degree 1.15g/cm of acid regeneration3More than, alkaline regeneration solution density 1.027g/cm3Above according to step 1 and 2 complete cation beds,Anion bed regenerates.
Beneficial effects of the present invention：On the one hand acid and alkali consumption is reduced；On the other hand acidic and alkaline waste water is fundamentally controlledYield, while save a large amount of regeneration demineralized waters, energy saving, consumption reduction, environmental protection.
Brief description of the drawings
Fig. 1 is a kind of industrial soft water acid-alkali regeneration liquid circulation use technology figure；
Fig. 2 is former industrial soft water water preparation process figure.
Specific embodiment
As shown in Figure 1, a kind of industrial soft water acid-alkali regeneration liquid recycling plant, including existing following equipment：Acid, alkali storageGroove is connected with acid, alkali injector respectively by pipeline；Acid, alkali injector are connected with cation bed and anion bed respectively；Cation bed and anion bed go outMouth difference connecting pipe；Desalination water tank is connected to acid, alkali injector by regeneration pump respectively；
It is characterized in that using following equipment：
Acid, alkaline regeneration solution accumulator tank are connected by acid, alkali regeneration pump with acid, alkali injector respectively；Cation bed, anion bed outlet conduit pointAcid, alkaline regeneration solution precipitation tank are not connected to by acid, alkali collection geosyncline respectively again；Acid, alkaline regeneration solution precipitation tank pass through acid, alkali respectivelyActive carbon filter is connected to acid, alkaline regeneration solution accumulator tank respectively again.
A kind of industrial soft water acid-alkali regeneration liquid recycling method, specific implementation step are as follows：
1. the hydrochloric acid that concentration is 30% in acid storage tank is mixed by Acid injector and demineralized water, the acid solution that concentration is 3% is configured to,Regenerated into cation bed, control cation bed regenerated liquid outlet has acid regeneration liquid stream to go out, and controls the cation bed recovery time to be45min, the acid regeneration liquid come out from cation bed enter acid recovery geosyncline, control sour geosyncline pump to enter acid regeneration liquid with the amount of 50t/hPrecipitation tank；
2. operating flocculant dosing pump will be according to acid regeneration liquid：Aluminium polychloride mass ratio is 1：Flocculation medicine after 0.03 proportioningAgent adds aluminium polychloride with the amount of 1.5t/h to acid regeneration liquid precipitate groove, removes the foreign matter and soil mixed in acid regeneration liquid,Settling ratio starts blowdown when being 50%, controls its turbidity below 10 degree, purified acid regeneration liquid enters acid activity carbon filterFiltered, remove calcium ions and magnesium ions, chlorion, jelly in acid regeneration liquid, the sour filtered fluid after filtering is then sent into acid againRaw liquid accumulator tank is spare；
3. regenerate cation bed again, it is 0.5% to adjust the acid regeneration liquid concentration in acid regeneration liquid accumulator tank（Instead of demineralized water）, lead toCross the mixed in hydrochloric acid that concentration in Acid injector and acid storage tank is 30%, the liquid-tight degree 1.15g/cm of adjustment acid regeneration3More than, into sunBed is regenerated, regenerative operation repeat step 1,2；
4. the lye that concentration is 30% in alkali storage tank is mixed by alkali injector and demineralized water, the lye that concentration is 5% is configured to,Regenerated into anion bed, control anion bed regenerated liquid outlet has alkaline regeneration solution outflow, controls the cation bed recovery time to be90min, the alkaline regeneration solution come out from anion bed enter alkali collection geosyncline, and control alkali geosyncline pump enters alkaline regeneration solution with the amount of 50t/hPrecipitation tank；
5. operating flocculant dosing pump will be according to alkaline regeneration solution：Aluminium polychloride mass ratio is 1：Flocculation medicine after 0.03 proportioningAgent adds aluminium polychloride to alkaline regeneration solution precipitation tank with the amount of 1.5t/h and removes the foreign matter and soil that mix in alkaline regeneration solution, sinksDrop than be 50% when start blowdown, control its turbidity below 10 degree, purified alkaline regeneration solution into basic active carbon filter intoRow filtering, removes calcium ions and magnesium ions, chlorion, jelly in acid regeneration liquid, and the alkali filtered fluid after filtering then is sent into alkali regenerationLiquid accumulator tank is spare；
6. regenerate anion bed again, it is 1% to adjust the alkaline regeneration solution concentration in alkaline regeneration solution accumulator tank（Instead of demineralized water）, pass throughThe liquid caustic soda that concentration is 30% in alkali injector and alkali storage tank mixes, adjustment alkaline regeneration solution density 1.027g/cm3More than, into anion bedRegenerated, regenerative operation repeat step 4,5.
The above described is only a preferred embodiment of the present invention, not make limitation in any form to the present invention；AppointWhat those skilled in the art, without departing from the scope of the technical proposal of the invention, all using the side of the disclosure aboveMethod and technology contents make technical solution of the present invention many possible changes and modifications, or are revised as the equivalent reality of equivalent variationsApply example.Therefore, every content without departing from technical solution of the present invention, the technical spirit according to the present invention do above exampleAny simple modification, equivalent substitution, equivalence changes and modification, still fall within the range of technical solution of the present invention protects.