A kind of integrative electroplating waste treatment facility
Technical field
The utility model relates to the electroplating wastewater processing field, particularly relates to a kind of integrative electroplating waste treatment facility.
Background technology
In the electroplating industry, that plating commonly used has is zinc-plated, copper facing, chromium plating, zinc-plated, cadmium plating etc.The source of its waste water is more extensive, is generally: (1) plating piece Cleaning Wastewater, (2) electroplating wastewater, (3) other waste water: comprise and wash away mill floor, scrub floor and ventilation installation water of condensation and because the various tank liquors and the draining of coating bath seepage or the improper run, drip, leak that cause of operational administrative; (4) equipment water of condensation: the equipment water of condensation in use except that cooling, does not generally receive the pollution of heavy metal.Wherein the plating piece Cleaning Wastewater is the main source of electroplating wastewater, almost accounts for more than 80% of workshop wastewater discharge.Contain high pollution materials such as a large amount of heavy metal ion and prussiate in the electroplating wastewater, toxicity is bigger.
The best treatment process of electroplating wastewater is the shunting of branch matter, handles respectively according to the situation of waste water.Yet at present, most of Electroplate Factory has a plurality of plating kinds simultaneously, and electroplating wastewater is not carried out the shunting of branch matter, causes various electroplating wastewater dual disposals, has brought certain difficulty for the processing of waste water.And also bigger for its water quality daily variation of same Electroplate Factory, add the bad control of dose, the dosing quantity not sufficient is then handled not up to standard, adds too much then processing cost increase of dose.
Summary of the invention
To the problems referred to above, the purpose of the utility model is providing a kind of integrative electroplating waste treatment facility of realizing the electroplating wastewater qualified discharge.
For achieving the above object; The technical scheme that the utility model proposed is: a kind of integrative electroplating waste treatment facility; Comprise the integrative electroplating waste pond, contact break pond, coagulation basin, flocculation basin, settling tank, the clean water basin that link to each other successively; It is characterized in that: also comprise an Iron sulfuret bed of packings between described contact break pond and coagulation basin; Described Iron sulfuret bed of packings water-in is positioned at Iron sulfuret bed of packings below, and water outlet is positioned at Iron sulfuret bed of packings top, and electroplating wastewater is from passing through the Iron sulfuret bed of packings down.
Further, be equipped with on the described contact break pond and add sour device and chlorinated lime adding set.
Further, describedly add in the sour device acid and be hydrochloric acid.
Further, adder-subtractor and PAC adding set are installed on the described coagulation basin.
Further, on the described flocculation basin PAM adding set is installed.
Further, adopt the integrative electroplating waste treatment process of aforesaid device: comprise the steps:
Step 1: with acid the pH in the contact break pond is transferred to acidity, and under agitation condition, add chlorinated lime, reaction 20-40min, added chlorinated lime is by 0.7-1.5kg/ ton electroplating wastewater;
Step 2: the waste water after the chlorinated lime contact break flows into the reaction of Iron sulfuret bed of packings;
Step 3: water outlet gets into coagulation basin in the Iron sulfuret bed of packings, in coagulation basin, adds alkali and regulates pH for alkaline, and add the PAC coagulating agent, and stirring reaction 5-10min gets into flocculation basin behind the coagulating sedimentation, and added PAC coagulating agent is by 50-500g/ ton electroplating wastewater;
Step 4: in flocculation basin, adding massfraction is the PAM flocculation agent of 0.5-1.0%, and added PAM is by 100-500ml/ ton electroplating wastewater; Slowly stir 1-2min, get into settling tank, behind the flocculation sediment, produce water and get into clean water basin.
Further, the added acid in the step 1 is hydrochloric acid.
Further, pH transfers to below 3.5 in the step 1.
Further, pH transfers to 7.5-8.5 in the step 3.
In sum, the utility model,, becomes hexavalent chrome reduction trivalent chromium and forms stable sulfide precipitation with sexavalent chrome heavy metal in addition abolishing complex compound electroplating wastewater and the abundant contact reacts of ferrous sulfate afterwards as the slowly-releasing filler with ferrous sulfate.The utility model is used for integrative electroplating waste to be handled, and has following advantage:
1) present method is easy to operate, and is easy to control, and working cost is low, and starting material obtain easily;
2) need not continuous dosing, waste water component, concentration, the water yield are all had stronger adaptive faculty;
3) all can effectively remove the heavy metal ion in the waste water, particularly therefore sexavalent chrome is applicable to the processing integrative electroplating waste.
Description of drawings
Fig. 1 is the described integrative electroplating waste treatment facility of a utility model substruction;
Fig. 2 is described another structure iron of integrative electroplating waste treatment facility of the utility model;
Wherein: 10. integrative electroplating waste pond, 11. contact break ponds, 110. add sour device, 111. chlorinated lime adding sets, 12. Iron sulfuret bed of packings, 13. coagulation basins, 130. adder-subtractors, 131.PAC adding set, 14. flocculation basins, 140.PAM adding set, 15. settling tanks, 16. clean water basin.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the utility model is further specified.
As shown in Figure 1; A kind of integrative electroplating waste treatment facility; Comprise the integrative electroplating waste pond 10, contact break pond 11, Iron sulfuret bed of packings 12, coagulation basin 13, flocculation basin 14, settling tank 15, the clean water basin 16 that link to each other successively; Iron sulfuret bed of packings 12 water-ins are positioned at Iron sulfuret bed of packings 12 belows, and water outlet is positioned at Iron sulfuret bed of packings 12 tops, and the integrative electroplating waste that comes out in contact break pond 11 is from passing through Iron sulfuret bed of packings 12 down; Water outlet from the top comes out again, gets into coagulation basin 13.As shown in Figure 2; Compared to Figure 1, be equipped with on the contact break pond 11 and add sour device 110 and chlorinated lime adding set 111, the acid that adds in the sour device 110 is hydrochloric acid; Adder-subtractor 130 and PAC adding set 131 are installed on the coagulation basin 13, PAM adding set 140 is installed on the flocculation basin 14.
Embodiment 1:
1) with hydrochloric acid the pH in the contact break pond is transferred to 3.0, and under agitation condition, add chlorinated lime, reaction 30min, added chlorinated lime is by 0.7kg/ ton electroplating wastewater;
2) waste water after the chlorinated lime contact break flows into the reaction of Iron sulfuret bed of packings;
3) water outlet gets into coagulation basin in the Iron sulfuret bed of packings, in coagulation basin, adds adjusting PH with base=8.0, and adds 200g/ ton electroplating wastewater PAC coagulating agent, stirring reaction 7min;
4) in flocculation basin, add 200ml/ ton electroplating wastewater, massfraction is 0.5% PAM flocculation agent.Slowly stir 2min, get into settling tank, behind the flocculation sediment, produce water and get into clean water basin, experimental result is seen table one.
Table one: experimental result
Although specifically show and introduced the utility model in conjunction with preferred embodiment; But the those skilled in the art should be understood that; In the spirit and scope of the utility model that does not break away from appended claims and limited; In form with on the details the utility model is made various variations, be the protection domain of the utility model.