CN104370397B - Stainless steel polishing method of wastewater treatment and device - Google Patents
Stainless steel polishing method of wastewater treatment and device Download PDFInfo
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- CN104370397B CN104370397B CN201410626898.3A CN201410626898A CN104370397B CN 104370397 B CN104370397 B CN 104370397B CN 201410626898 A CN201410626898 A CN 201410626898A CN 104370397 B CN104370397 B CN 104370397B
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- water tank
- water
- stainless steel
- wastewater treatment
- concentrated water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Stainless steel polishing method of wastewater treatment and device, it is characterized in that comprising sewage collecting box, the reaction water tank be connected with sewage collecting box by the first lift pump, by the concentrated water tank that the second lift pump is connected with reaction water tank, by the solid-liquid separation system that the 3rd lift pump is connected with concentrated water tank, sludge dehydration device, the clear water discharge of solid-liquid separation system, concentrate recirculation is to concentrated water tank, sludge dehydration device is connected with concentrated water tank by sump pump, the pressing filtering liquid of sludge dehydration device is back on concentrated water tank, reaction water tank adopts high-voltage pulse electric flocculation, the Fe that soluble metal pole plate dissociates on anode
2 +with the effect of aqueous solution intermediate ion, the Fe (OH) of generation
3.Compared with the prior art the present invention, has the good advantage of water quality after that treatment effect can not affect by factors such as the change of pharmacy quality, proportioning, dosage etc. and water change of water quality, process.
Description
Technical field:
The present invention relates to a kind of method of wastewater treatment and device.
Background technology:
Existing stainless steel polishing wastewater processing technology, the technology of its part of being got off by iron particle deposition all adopts traditional chemical process, namely chemical agent is thrown in toward stainless steel polishing waste water, by generating not diffluent iron chemicals by the iron sedimentation in stainless steel polishing waste water or filter down, to reach the object of wastewater treatment, the shortcoming that this technology exists is: easily by pharmacy quality, proportioning, the instability of the Disposal quality that the factors such as the change of dosage etc. and water change of water quality cause, because effective precipitation needs that the particle diameter of precipitate particles is enough large and proportion is enough large, often need excessively to add flocculation agent and polymer coagulant aids, this just causes and produces abundant residues medicament in water, the consequence brought thus is, produce water water quality inferiority, affect the effect of subsequent disposal and have impact to discharge index.
Summary of the invention:
The stainless steel polishing method of wastewater treatment that goal of the invention of the present invention is to provide that a kind for the treatment of effect can not affect by factors such as the change of pharmacy quality, proportioning, dosage etc. and water change of water quality, water quality after process is good and device.
Stainless steel polishing wastewater treatment equipment of the present invention realizes like this, comprise sewage collecting box, the reaction water tank be connected with sewage collecting box by the first lift pump, by the concentrated water tank that the second lift pump is connected with reaction water tank, by the solid-liquid separation system that the 3rd lift pump is connected with concentrated water tank, sludge dehydration device, the clear water discharge of solid-liquid separation system, concentrate recirculation is to concentrated water tank, sludge dehydration device is connected with concentrated water tank by sump pump, the pressing filtering liquid of sludge dehydration device is back on concentrated water tank, reaction water tank adopts high-voltage pulse electric flocculation, the Fe that soluble metal pole plate dissociates on anode
2+with the effect of aqueous solution intermediate ion, generate Fe (OH)
3, reaction formula is as follows:
Fe
2＋+2OH
－→Fe(OH)
2
4Fe(OH)
2+O
2+2H
2O→4Fe(OH)
3
Generate the Fe (OH) having throwing out
3compound, the electron reduction discharged in addition is with the pollutent of positive electricity, and solid-liquid separation system adopts tubular membrane filtering system (Tubularmembranefiltrationsystem).
Here, reaction water tank is provided with alkali lye and adds mechanism, reach alkalescence to regulate the potential of hydrogen of the waste water in reaction water tank.Like this, under utilizing high alkali environment, the feature that metal hydroxides solubleness is low, at utmost realizes solid-liquid separation.
The clear water output of solid-liquid separation system is connected with the water tank adding mechanism with acid solution, and the clear water in water tank just discharges after adding soda acid and reaching neutrality.
Tubular membrane filtering system is provided with cleaning system, and the rinse water that cleaning system cleans out is communicated to sewage collecting box.Like this, the pollution just preventing cleaning sullage from discharging.
In order to promote filter effect further, connect nanofiltration system at tubular membrane filtering system clear water output, nanofiltration system clear water is out drained, and concentrate recirculation is to concentrated water tank.
Electricity flocculation is one of most important physicochemical operation method in water treatment.We are used to describe molecule unstable in liquid with cohesion and are aggregated into this process of larger particle.Pollutent in liquid: the solute as heavy metal ion, organic-inorganic is all exist in solution with charged state substantially.Add in a liquid with the ion with solute opposite charges, make dissolving object unstable and aggegation, thus the method for available precipitation and filtration is removed.Have a variety of method can reach the object of cohesion, chemical coagulation method is one of conventional method.But this treatment process costly and produce a large amount of mud.Biological method, due to treating processes more complicated, is difficult to generally use.And electric flocculation treatment systems utilizes electrochemical principle, under the effect of electric current, dissolve solubility electrode, become the ion with electric charge and discharge electronics.The ion produced and water power are from (the OH of rear generation
-) combine, generate the compound having throwing out.The electron reduction discharged in addition with the pollutent of positive electricity, thus reaches the object removing pollutent in liquid.
High-voltage pulse electric flocculation is a kind of electric flocculation technique efficiently.Traditional electricity flocculation is because adopting low voltage, high electric current, and make processing costs higher, this is unfavorable for that it is promoted the use of on a large scale.High voltage electrocagulation rule adopts the pulse power supply mode of high-voltage, small area analysis, and power consumption and iron loss significantly reduce, and the soil removability of equipment strengthens, and high-voltage pulse electric flocculation is also more safe and reliable than traditional electrical flocculation.
Tubular membrane filtering system is the low pressure separating technology relying on film to be separated from solution by solid.
Compare the technique of traditional coagulating sedimentation+sand filtration, the advantage of tubular membrane filtering system is as follows:
Level of automation is very high, simple to operate;
Reliable filtering water (absolute membrane filtration);
Can intermittent operation;
Owing to not needing rapid subsidence, so decrease the interpolation of water treatment agent, as PAM, PAC;
Product discharge can be increased by the quantity increasing film.
Sturdy durable, firm in structure, there will not be fracture of wire phenomenon, product water water quality is reliable, chemical resistance is good, can use 15% hydrochloric acid, 15% sodium hydroxide, 15% clorox cleaning, also effectively can clean recovery to membranous system, and not cause damage to film under extreme accident conditions.
withtradition
the contrast of operational path
Tubular membrane filtering system system: reaction water tank+concentrated water tank+tubular membrane filtering system;
Legacy system: reaction water tank+precipitation clarification+husky filter+dish filter+Hollow Fiber Ultrafiltration.
Table 2-2 process ration
Nanofiltration is a kind of pressure-driven membrane separating process between reverse osmosis and ultrafiltration, the pore diameter range of nanofiltration membrane at several ran, nanofiltration membrane mostly from reverse osmosis membrane derivation, as CA, CTA film, aromatic polyamide composite membrane and sulfonated polyether sulfone film etc.But compared with reverse osmosis, its working pressure is lower.
Stainless steel polishing method of wastewater treatment of the present invention realizes like this, first by stainless steel polishing wastewater collection to sewage collecting box, then by the first lift pump, the waste water of sewage collecting box is transported to reaction water tank, at the agglutinating matter Fe (OH) reacting in water tank, produced by high-voltage pulse electric flocculation
3the aggegation by the dissolving object instability in waste water, then the waste water just completing aggegation delivers to concentrated water tank by the second lift pump, the solid-liquid separation system that waste water in concentrated water tank is delivered to after applying the constant water pressure of setting by the 3rd lift pump, solid-liquid separation system adopts tubular membrane filtering system, the clear water that tubular membrane filtering system is produced is drained, concentrate recirculation is in concentrated water tank, the dense water of part in concentrated water tank is by sludge pumping to sludge dehydration device, and the pressing filtering liquid of sludge dehydration device is back on concentrated water tank.
Here, add alkali lye at reaction water tank, make waste water be alkalescence.
After tubular membrane filtering system runs for some time, carry out back flushing by cleaning system to the micro-filtration membrane module of tubular membrane filtering system, the rinse water that cleaning system cleans out flows to sewage collecting box.Cleaning system comprises clean water and compressor purge.
Here, controlled the startup of the 3rd lift pump by the water level controlling concentrated water tank, to control the water solid concentration of the waste water delivering to tubular membrane filtering system between 3%-5%, thus ensure that the normal of tubular membrane filtering system works effectively.
Tubular membrane filtering system clear water is out introduced into water tank, adds after acid regulates the potential of hydrogen of clear water to be neutrality, just drain toward water tank.
In order to promote filter effect further, at tubular membrane filtering system clear water again through nanofiltration system process, nanofiltration system clear water is out drained, and concentrate recirculation is to concentrated water tank.
Compared with the prior art the present invention, has the good advantage of water quality after that treatment effect can not affect by factors such as the change of pharmacy quality, proportioning, dosage etc. and water change of water quality, process.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of the micro-filtration membrane module of tubular membrane filtering system.
Embodiment:
Now in conjunction with the accompanying drawings and embodiments the present invention is described in further detail:
As shown in the figure, the present invention includes sewage collecting box, the reaction water tank be connected with sewage collecting box by the first lift pump, by the concentrated water tank that the second lift pump is connected with reaction water tank, by the solid-liquid separation system that the 3rd lift pump is connected with concentrated water tank, sludge dehydration device, the clear water discharge of solid-liquid separation system, concentrate recirculation is to concentrated water tank, sludge dehydration device is connected with concentrated water tank by sump pump, the pressing filtering liquid of sludge dehydration device is back on concentrated water tank, reaction water tank adopts high-voltage pulse electric flocculation, the Fe that soluble metal pole plate dissociates on anode
2+with the effect of aqueous solution intermediate ion, the Fe (OH) of generation
3, reaction formula is as follows:
Fe
2＋+2OH
－→Fe(OH)
2
4Fe(OH)
2+O
2+2H
2O→4Fe(OH)
3
Generate the Fe (OH) having throwing out
3compound, the electron reduction discharged in addition is with the pollutent of positive electricity, and solid-liquid separation system adopts tubular membrane filtering system (Tubularmembranefiltrationsystem).
Here, reaction water tank is provided with alkali lye and adds mechanism, reach alkalescence to regulate the potential of hydrogen of the waste water in reaction water tank.Like this, under utilizing high alkali environment, the feature that metal hydroxides solubleness is low, at utmost realizes solid-liquid separation.
The clear water output of solid-liquid separation system is connected with the water tank adding mechanism with acid solution, and the clear water in water tank just discharges after adding soda acid and reaching neutrality.
Tubular membrane filtering system is provided with cleaning system, and the rinse water that cleaning system cleans out is communicated to sewage collecting box.Like this, the pollution just preventing cleaning sullage from discharging.
In order to promote filter effect further, connect nanofiltration system at tubular membrane filtering system clear water output, nanofiltration system clear water is out drained, and concentrate recirculation is to concentrated water tank.
Stainless steel polishing method of wastewater treatment stainless steel polishing method of wastewater treatment of the present invention realizes like this, first by stainless steel polishing wastewater collection to sewage collecting box, then by the first lift pump, the waste water of sewage collecting box is transported to reaction water tank, at the agglutinating matter Fe (OH) reacting in water tank, produced by high-voltage pulse electric flocculation
3the aggegation by the dissolving object instability in waste water, then the waste water just completing aggegation delivers to concentrated water tank by the second lift pump, the solid-liquid separation system that waste water in concentrated water tank is delivered to after applying the constant water pressure of setting by the 3rd lift pump, solid-liquid separation system adopts tubular membrane to filter, tubular membrane is filtered the clear water produced and is drained, concentrate recirculation is in concentrated water tank, the dense water of part in concentrated water tank is by sludge pumping to sludge dehydration device, and the pressing filtering liquid of sludge dehydration device is back on concentrated water tank.
Here, add alkali lye at reaction water tank, make waste water be alkalescence.
After tubular membrane filtering system runs for some time, carry out back flushing by cleaning system to the micro-filtration membrane module of tubular membrane filtering system, the rinse water that cleaning system cleans out flows to sewage collecting box.Cleaning system comprises clean water and compressor purge.
Here, controlled the startup of the 3rd lift pump by the water level controlling concentrated water tank, to control the water solid concentration of the waste water delivering to tubular membrane filtering system between 3%-5%, thus ensure that the normal of tubular membrane filtering system works effectively.
Tubular membrane filtering system clear water is out introduced into water tank, adds after acid regulates the potential of hydrogen of clear water to be neutrality, just drain toward water tank.
In order to promote filter effect further, at tubular membrane filtering system clear water again through nanofiltration system process, nanofiltration system clear water is out drained, and concentrate recirculation is to concentrated water tank.
Claims (10)
1. stainless steel polishing wastewater treatment equipment, it is characterized in that comprising sewage collecting box, the reaction water tank be connected with sewage collecting box by the first lift pump, by the concentrated water tank that the second lift pump is connected with reaction water tank, by the solid-liquid separation system that the 3rd lift pump is connected with concentrated water tank, sludge dehydration device, the clear water discharge of solid-liquid separation system, concentrate recirculation is to concentrated water tank, sludge dehydration device is connected with concentrated water tank by sump pump, the pressing filtering liquid of sludge dehydration device is back on concentrated water tank, reaction water tank adopts high-voltage pulse electric flocculation, the Fe that soluble metal pole plate dissociates on anode
2+with the effect of aqueous solution intermediate ion, generate Fe (OH)
3, reaction formula is as follows:
Fe
2＋+2OH
－→Fe(OH)
2
4Fe(OH)
2+O
2+2H
2O→4Fe(OH)
3
Generate the Fe (OH) having throwing out
3compound, the electron reduction discharged in addition is with the pollutent of positive electricity, and solid-liquid separation system adopts tubular membrane filtering system.
2. stainless steel polishing wastewater treatment equipment according to claim 1, is characterized in that reaction water tank is provided with alkali lye adds mechanism, reaches alkalescence to regulate the potential of hydrogen of the waste water in reaction water tank.
3. stainless steel polishing wastewater treatment equipment according to claim 2, is characterized in that the clear water output of solid-liquid separation system is connected with the water tank adding mechanism with acid solution, and the clear water in water tank just discharges after adding soda acid and reaching neutrality.
4. the stainless steel polishing wastewater treatment equipment according to claim 1 or 2 or 3, it is characterized in that tubular membrane filtering system is provided with cleaning system, the rinse water that cleaning system cleans out is communicated to sewage collecting box.
5. the stainless steel polishing wastewater treatment equipment according to claim 1 or 2 or 3, it is characterized in that connecting nanofiltration system at tubular membrane filtering system clear water output, nanofiltration system clear water is out drained, and concentrate recirculation is to concentrated water tank.
6. stainless steel polishing wastewater treatment equipment according to claim 4, it is characterized in that connecting nanofiltration system at tubular membrane filtering system clear water output, nanofiltration system clear water is out drained, and concentrate recirculation is to concentrated water tank.
7. stainless steel polishing method of wastewater treatment, it is characterized in that first by stainless steel polishing wastewater collection to sewage collecting box, then by the first lift pump, the waste water of sewage collecting box is transported to reaction water tank, at the agglutinating matter Fe (OH) reacting in water tank, produced by high-voltage pulse electric flocculation
3the aggegation by the dissolving object instability in waste water, then the waste water just completing aggegation delivers to concentrated water tank by the second lift pump, the solid-liquid separation system that waste water in concentrated water tank is delivered to after applying the constant water pressure of setting by the 3rd lift pump, solid-liquid separation system adopts tubular membrane to filter, the clear water that tubular membrane filtering system is produced is drained, concentrate recirculation is in concentrated water tank, the dense water of part in concentrated water tank is by sludge pumping to sludge dehydration device, and the pressing filtering liquid of sludge dehydration device is back on concentrated water tank.
8. stainless steel polishing method of wastewater treatment according to claim 7, it is characterized in that adding alkali lye at reaction water tank, make waste water be alkalescence, tubular membrane filtering system clear water is out introduced into water tank, add after acid regulates the potential of hydrogen of clear water to be neutrality toward water tank, just drain.
9. the stainless steel polishing method of wastewater treatment according to claim 7 or 8, is characterized in that the water level by controlling concentrated water tank controls the startup of the 3rd lift pump, to control the water solid concentration of the waste water delivering to tubular membrane filtering system between 3%-5%.
10. stainless steel polishing method of wastewater treatment according to claim 9, it is characterized in that, at tubular membrane filtering system clear water again through nanofiltration system process, nanofiltration system clear water is out drained, concentrate recirculation is to concentrated water tank.
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|---|---|---|---|
| CN201410626898.3A CN104370397B (en) | 2014-11-10 | 2014-11-10 | Stainless steel polishing method of wastewater treatment and device |
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| CN104370397B true CN104370397B (en) | 2016-01-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106904706A (en) * | 2017-03-06 | 2017-06-30 | 王刚 | A kind of waste water solid separation equipment and system |
| CN108328816A (en) * | 2018-01-26 | 2018-07-27 | 广东盈睿通环境科技有限公司 | Abrasive waste water treatment process |
| CN110877947A (en) * | 2018-09-05 | 2020-03-13 | 深圳市中天环境有限公司 | Leachate treatment device |
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|---|---|---|---|---|
| CN104071925A (en) * | 2014-07-14 | 2014-10-01 | 东莞汇金环境科技有限公司 | Zero-drainage treatment system and zero-drainage treatment method for nickel plating wastewater in steel workshop |
| CN204224371U (en) * | 2014-11-10 | 2015-03-25 | 李�杰 | Stainless steel polishing wastewater treatment equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104071925A (en) * | 2014-07-14 | 2014-10-01 | 东莞汇金环境科技有限公司 | Zero-drainage treatment system and zero-drainage treatment method for nickel plating wastewater in steel workshop |
| CN204224371U (en) * | 2014-11-10 | 2015-03-25 | 李�杰 | Stainless steel polishing wastewater treatment equipment |
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Effective date of registration: 20160128 Address after: 528100, Foshan City, Guangdong province Guicheng Nanhai District 17 deep sea road, Han Tian science and technology city A6301 Patentee after: FOSHAN MICLEAN TECHNOLOGY CO., LTD. Address before: 528200 Guangdong Province Nanhai District of Foshan city streets Guicheng deep sea No. 17 Han day science and technology city A6301 Patentee before: Li Jie Patentee before: Lu Xiaoshan |