CN204079640U - Acid-washing stainless steel line generalization Waste Water Treatment - Google Patents
Acid-washing stainless steel line generalization Waste Water Treatment Download PDFInfo
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- CN204079640U CN204079640U CN201420406010.0U CN201420406010U CN204079640U CN 204079640 U CN204079640 U CN 204079640U CN 201420406010 U CN201420406010 U CN 201420406010U CN 204079640 U CN204079640 U CN 204079640U
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Abstract
The utility model provides a kind of acid-washing stainless steel line generalization Waste Water Treatment, comprise reduction reaction pond, oil separation grit chamber, waste water catchments double reaction tank, settling tank, air flotation pool, PH regulating tank, intermediate pool, medium filter, activated charcoal filter, sludge sump and plate-and-frame filter press, reduction reaction pond and oil separation grit chamber are connected to waste water respectively and catchment double reaction tank, the waste water double reaction tank that catchments divides two-way to extend, one tunnel is successively through settling tank, air flotation pool, PH regulating tank, intermediate pool, medium filter, discharge tube or recovery channel is connected to after activated charcoal filter, another road is connected to water collecting basin and dewatered sludge cartage department successively after sludge sump and plate-and-frame filter press.This stainless steel electrolytic pickling comprehensive wastewater treatment system, can comprehensive treating process electrolytic pickling waste water, and structure is simple, and cycling utilization of wastewater rate is high, reaches environment protection emission requirement.
Description
Technical field
The utility model relates to wastewater treatment industry, specifically a kind of acid-washing stainless steel electrolytic wire comprehensive wastewater treatment system.
Background technology
In stainless-steel cold-rolling industry, Stainless Steel Band through milling train roll thin after, the weave construction of steel band inside, need to carry out crystallization again of annealing, after but stainless steel is annealed, surface can produce oxide skin, needs by the oxide skin on electrolysis process and acid cleaning process removal steel surface and corrosion thing.When electrolysis process and acid cleaning process, need to carry out scrubbing steel band with a large amount of water, remove the surface chemistries that steel band is residual.Along with Environmental Protection Agency is more and more higher to environmental requirement, also more and more higher to the emission standard of waste water, the waste water after electrolytic pickling needs to carry out processing then to carry out recycle or discharge.
Generally current electrolysis process adopts sodium sulfate to carry out electrolysis as ionogen, adopts the processing method of nitric acid acid and hydrofluoric acid mixing pickling; Electrolytic process produces sexavalent chrome and nickel ion in the electrolytic solution, thus in electrolytic cleaning waste water, also contains sexavalent chrome and nickel ion; At acid cleaning process, produce trivalent chromium and nickel ion in pickle solution, thus cleaning process after pickling produces the Cleaning Wastewater containing trivalent chromium and nickel ion.According to cleaner production requirement, this waste water is always containing heavy metal ion, and belong to first kinds of pollution matter, this comprehensive wastewater belongs to mineral-type waste water substantially, and principal pollutant are acid, trivalent chromium, sexavalent chrome, nickel.Current electrolysis wastewater and pickling waste waters processing cost higher, separately process, wastewater discharge is more, and cyclic utilization rate is low.
Utility model content
In view of the above, the utility model is necessary to provide a kind of stainless steel electrolytic pickling comprehensive wastewater treatment system, can comprehensive treating process electrolytic pickling waste water, and cycling utilization of wastewater rate is high, reaches environment protection emission requirement.
The utility model provides a kind of acid-washing stainless steel line generalization Waste Water Treatment, comprise reduction reaction pond, oil separation grit chamber, waste water catchments double reaction tank, settling tank, air flotation pool, PH regulating tank, intermediate pool, medium filter, activated charcoal filter, sludge sump and plate-and-frame filter press, reduction reaction pond and oil separation grit chamber are connected to waste water respectively and catchment double reaction tank, the waste water double reaction tank that catchments divides two-way to extend, one tunnel is successively through settling tank, air flotation pool, PH regulating tank, intermediate pool, medium filter, discharge tube or recovery channel is connected to after activated charcoal filter, another road is connected to water collecting basin and dewatered sludge cartage department successively after sludge sump and plate-and-frame filter press.
Further, described medium filter is also connected directly to waste water and catchments double reaction tank, flows into waste water to catchment double reaction tank for the waste water after backwash.
Further, described air flotation pool is also connected directly to sludge sump, enters sludge sump for the solid of solid-liquid separation in air flotation pool.
Compared to prior art, the utility model acid-washing stainless steel line generalization Waste Water Treatment can comprehensive treating process electrolytic pickling waste water, and structure is simple, and cycling utilization of wastewater rate is high, reaches environment protection emission requirement.
Preferred embodiment of the present utility model and beneficial effect thereof, will further describe in conjunction with embodiment.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for specification sheets, is used from explanation the utility model with embodiment one below, but should not form restriction of the present utility model.In the accompanying drawings,
Fig. 1 is the structured flowchart of the utility model acid-washing stainless steel line generalization Waste Water Treatment.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the utility model, is not limited to the utility model.
According to cleaner production requirement, acid-washing stainless steel line generalization waste water is always containing heavy metal ion, and belong to first kinds of pollution matter, this comprehensive wastewater belongs to mineral-type waste water substantially, and principal pollutant are acid, trivalent chromium, sexavalent chrome, nickel, what electrowinning process produced must collect separately containing sexavalent chrome Cleaning Wastewater, carries out reduction reaction pre-treatment separately, sexavalent chrome is changed into trivalent chromium, and then with pickling waste water combination treatment, as long as trivalent chromium and nickel are under suitable pH value condition, just insoluble chromium hydroxide and nickel hydroxide can be generated, therefore, at wastewater treatment process, corresponding flocculation agent can be added and regulate suitable pH value in waste water, just can progressively pollutent be removed from waste water, produce the Coagulation and Adsorption effect of throw out by adding flocculation agent simultaneously, other pollutants can be removed, this waste water is after above-mentioned process, pollutent substantially can be up to standard, but the turbidity of water is also unstable, therefore work advanced treatment is needed, just matting can be back to, for this reason for the basic demand of quality of reused water, and the economic feasibility of waste water recycling, the utility model carries out materialization for all waste water, filter method process, by the acid of waste water, chromium, nickel metal ion is removed, and water outlet reaches reuse water requirement after making process.
Refer to Fig. 1, the utility model preferred embodiment provides acid-washing stainless steel line generalization Waste Water Treatment to mainly include reduction reaction pond 1, oil separation grit chamber 2, and waste water catchments double reaction tank 3, settling tank 4, air flotation pool 5, PH regulating tank 6, intermediate pool 7, medium filter 8, activated charcoal filter 9, sludge sump 10, and plate-and-frame filter press 11.Reduction reaction pond 1 and oil separation grit chamber 2 are connected to waste water respectively and catchment double reaction tank 3, the waste water double reaction tank 3 points of two-way that catchment extend, one tunnel is connected to discharge tube or recovery channel successively after settling tank 4, air flotation pool 5, PH regulating tank 6, intermediate pool 7, medium filter 8, activated charcoal filter 9, and another road is connected to water collecting basin and dewatered sludge cartage department successively after sludge sump 10 and plate-and-frame filter press 11.Further, medium filter 8 is also connected directly to waste water and catchments double reaction tank 3, and air flotation pool 5 is also connected directly to sludge sump 10.
Acid-washing stainless steel line generalization wastewater treatment principle and process as follows, comprehensive wastewater process mainly includes the process of pickling waste waters and electrolysis wastewater, also containing sexavalent chrome and nickel ion in electrolytic cleaning waste water, need first hexavalent chromium to be reduced to trivalent chromic ion, electrolytic cleaning waste water is promoted to reduction reaction pond 1 through pump, arranges PH, ORP meter and control volume pump Automatic Dosing in reduction reaction pond 1.Count control volume pump by PH to control to add sulphuric acid soln, regulate between pH value to 0.5-2, sodium sulfite solution is added by volume pump, count control volume pump by ORP and add sodium sulfite solution, between control ORP value 60-30, reduction reaction pond 1 water outlet enters the waste water double reaction tank 3 that catchments and is for further processing.
Acid comprehensive wastewater flows into oil separation grit chamber 2 through water drain, oil separation grit chamber 2 deadens greasy dirt drift and sedimentation big particle, water outlet enters waste water and to catchment double reaction tank 3, the waste water double reaction tank 3 that catchments has three, and three reaction tanks that catchment are used alternatingly, to the water collecting basin in completely pond, start its pneumatic pump and pneumatic blending is carried out to Chi Shui, simultaneously add liming, alkali lye to waste water in pond, regulate waste water to catchment the pH value of waste water in double reaction tank 3, stablely reach about 11.In waste water, add heavy metal chelating agent, PAM (polyacrylamide, English name: Polyacrylamide), waste water enters tube settler (corresponding precipitation ground 4) through promoting, and carries out solid-liquid separation.Tube settler base sludge regularly enters sludge sump 10, and top clear water flows into air flotation pool 5, adds polymeric aluminum chlorides solution simultaneously, PAM solution carries out solid-liquid separation further in air flotation pool 5 by volume pump.The solid that air flotation pool 5 is separated enters sludge sump 10.The water outlet overflow of air flotation pool 5 enters PH regulating tank 6, as when in PH regulating tank 6, pH value is greater than 9, about adding sulphuric acid soln levelling pH value to 8 by PH meter control volume pump.Regulating tank 6 water outlet flows into intermediate pool 7.Intermediate pool 7 water storage reaches certain water level and squeezes into the further granule foreign removed in waste water of current inflow activated charcoal filter 9 after medium filter 8, medium filter 8 filtration through lift pump, reuse or discharge between water outlet direct carriage return after filtering, is imported by discharge tube or recovery channel.Medium filter 8 is looked water quality situation and is needed regular backwash, and when strainer water outlet is obviously muddy, medium filter 8 must carry out back flushing, and the current after back flushing flow into waste water and to catchment double reaction tank 3.Mud in sludge sump 10 carries out processed through sludge pump input plate-and-frame filter press 11, and the filtrate after dehydration flows into water collecting basin, and the dewatered sludge of formation is transferred to dewatered sludge cartage department, stacks outward transport in order to concentrating.
To sum up, the utility model comprehensive wastewater treatment system mainly includes reduction reaction pond, oil separation grit chamber, and waste water catchments double reaction tank, settling tank, air flotation pool, PH regulating tank, intermediate pool, medium filter, activated charcoal filter, sludge sump and plate-and-frame filter press.PH, ORP meter is set in reduction reaction pond and controls volume pump Automatic Dosing.Count control volume pump by PH to control to add sulphuric acid soln, regulate between pH value to 1-2, add sodium sulfite solution by volume pump, control volume pump by ORP meter and add sodium sulfite solution, between control ORP value 50-300.The waste water double reaction tank that catchments has three, and three reaction tanks that catchment are used alternatingly, to the water collecting basin in completely pond, start its pneumatic pump and pneumatic blending is carried out to Chi Shui, add liming, alkali lye to waste water in pond simultaneously, regulate the pH value of waste water in reaction tank, stablize and reach about 10.5.Air flotation pool water outlet overflow enters PH regulating tank, as pH value be greater than 9 time, counted by PH and control volume pump and add sulphuric acid soln and align about pH value to 8.Intermediate pool water storage reaches certain water level and squeezes into medium filter, activated charcoal filter through lift pump and remove granule foreign in waste water further, reuse or discharge between water outlet direct carriage return after filtering.So, can comprehensive treating process electrolytic pickling waste water, structure is simple, and cycling utilization of wastewater rate is high, reaches environment protection emission requirement.
As long as without prejudice to the thought that the utility model is created, carry out arbitrary combination to various different embodiment of the present utility model, all should be considered as content disclosed in the utility model; Within the scope of technical conceive of the present utility model, to the arbitrary combination of the thought created without prejudice to the utility model that technical scheme carries out that multiple simple modification and different embodiment carry out, all should within protection domain of the present utility model.
Claims (3)
1. an acid-washing stainless steel line generalization Waste Water Treatment, it is characterized in that: comprise reduction reaction pond (1), oil separation grit chamber (2), waste water catchments double reaction tank (3), settling tank (4), air flotation pool (5), PH regulating tank (6), intermediate pool (7), medium filter (8), activated charcoal filter (9), sludge sump (10) and plate-and-frame filter press (11), reduction reaction pond (1) and oil separation grit chamber (2) are connected to waste water respectively and catchment double reaction tank (3), waste water double reaction tank (3) point two-way that catchments extends, one tunnel is successively through settling tank (4), air flotation pool (5), PH regulating tank (6), intermediate pool (7), medium filter (8), activated charcoal filter is connected to discharge tube or recovery channel after (9), another road is connected to water collecting basin and dewatered sludge cartage department successively after sludge sump (10) and plate-and-frame filter press (11).
2. acid-washing stainless steel line generalization Waste Water Treatment according to claim 1, it is characterized in that: described medium filter (8) is also connected directly to waste water and catchments double reaction tank (3), flow into waste water for the waste water after backwash and to catchment double reaction tank (3).
3. acid-washing stainless steel line generalization Waste Water Treatment according to claim 1, it is characterized in that: described air flotation pool (5) is also connected directly to sludge sump (10), the solid for air flotation pool (5) interior solid-liquid separation enters sludge sump (10).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104787928A (en) * | 2015-04-16 | 2015-07-22 | 南阳师范学院 | Recovery processing method of stainless steel acid pickling waste liquid containing iron, chromium and nickel |
| CN106380016A (en) * | 2016-08-31 | 2017-02-08 | 云南炳森环境工程有限公司 | Steel pickling wastewater treatment and reuse method and device |
| CN106746036A (en) * | 2017-03-15 | 2017-05-31 | 福建欣宇卫浴科技股份有限公司 | Stainless steel acid cleaning waste water processing system |
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2014
- 2014-07-22 CN CN201420406010.0U patent/CN204079640U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104787928A (en) * | 2015-04-16 | 2015-07-22 | 南阳师范学院 | Recovery processing method of stainless steel acid pickling waste liquid containing iron, chromium and nickel |
| CN104787928B (en) * | 2015-04-16 | 2016-10-05 | 南阳师范学院 | A kind of iron content, chromium, the recovery and treatment method of nickel and stainless steel pickle liquor |
| CN106380016A (en) * | 2016-08-31 | 2017-02-08 | 云南炳森环境工程有限公司 | Steel pickling wastewater treatment and reuse method and device |
| CN106746036A (en) * | 2017-03-15 | 2017-05-31 | 福建欣宇卫浴科技股份有限公司 | Stainless steel acid cleaning waste water processing system |
| CN106746036B (en) * | 2017-03-15 | 2024-01-05 | 福建希海环保科技有限公司 | Stainless steel pickling wastewater treatment system |
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