CN110550757A - pickling wastewater treatment process for steel mill - Google Patents
pickling wastewater treatment process for steel mill Download PDFInfo
- Publication number
- CN110550757A CN110550757A CN201810458598.7A CN201810458598A CN110550757A CN 110550757 A CN110550757 A CN 110550757A CN 201810458598 A CN201810458598 A CN 201810458598A CN 110550757 A CN110550757 A CN 110550757A
- Authority
- CN
- China
- Prior art keywords
- reverse osmosis
- water tank
- wastewater
- tank
- osmosis water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/727—Treatment of water, waste water, or sewage by oxidation using pure oxygen or oxygen rich gas
-
- 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
Abstract
the invention discloses a steel mill pickling wastewater treatment process, which comprises the steps of homogenizing water quality through a regulating reservoir, then entering a security filter, primarily filtering, then entering an ultrafiltration membrane component for ultrafiltration membrane filtration, and removing insoluble impurities in water; the steel pickling wastewater filtered by the ultrafiltration membrane is sent to a first-stage reverse osmosis water tank by a pressure pump for reverse osmosis filtration treatment, the effluent of the first-stage reverse osmosis water tank is sent to a second-stage reverse osmosis water tank by the pressure pump, and the effluent of the second-stage reverse osmosis water tank enters a clean water tank; high-concentration salt solution in the first reverse osmosis water tank and the second reverse osmosis water tank is sent to a neutralization reaction tank; adding a neutralizing agent into the reduction reaction tank, and adjusting the pH value of the solution to 3-5.5; the wastewater is neutralized, oxidized, coagulated, precipitated and filtered in a water purifier and then is discharged after reaching the standard; the sludge of the water purifier is conveyed to a sludge dewatering machine by a pump for filter pressing, the sludge cake is handed to a sanitation department for treatment, and the filtrate returns to a regulating tank for retreatment.
Description
Technical Field
the invention relates to the technical field of wastewater treatment, in particular to a steel mill pickling wastewater treatment process.
Background
at present, the steel yield of China exceeds 1 hundred million tons, and half of the steel yield is used for producing steel pipes, rolled plates and section steel. The product can be delivered from a factory after being subjected to acid pickling treatment in the production process, and can be processed into various terminal finished products after being subjected to acid pickling surface treatment once in the market and sent to various processing plants. Every 1 million tons of steel are treated by pickling for 1 time, and 2 million tons of pickling waste water and 600 tons of waste acid are generated averagely. Thus, 3 million tons/year of pickling wastewater, 600 million tons/year of waste acid, 20 million tons/year of COD, 850 million tons/year of iron mud and 2 million tons/year of phosphorus are generated nationwide.
the steel pickling wastewater is directly discharged without being treated in thousands of small and medium enterprises in China, is mostly discharged after being neutralized by lime and caustic soda compared with the treatment of regular enterprises, and is treated by mixing the wastewater and the waste acid together. This treatment method does not completely provide effective filtration of the wastewater.
Disclosure of Invention
the invention aims to provide a steel mill pickling wastewater treatment process, which can meet the existing sewage treatment requirements and is economic and environment-friendly.
In order to achieve the purpose, the invention provides the following technical scheme: a steel mill pickling wastewater treatment process comprises the following steps:
(1) The steel pickling wastewater is homogenized by a regulating tank and then enters a security filter, and after primary filtration, the steel pickling wastewater enters an ultrafiltration membrane component for ultrafiltration membrane filtration to remove insoluble impurities in water;
(2) The steel pickling wastewater filtered by the ultrafiltration membrane is sent to a first-stage reverse osmosis water tank by a pressure pump for reverse osmosis filtration treatment, the effluent of the first-stage reverse osmosis water tank is sent to a second-stage reverse osmosis water tank by the pressure pump, and the effluent of the second-stage reverse osmosis water tank enters a clean water tank;
(3) High-concentration salt solution in the first reverse osmosis water tank and the second reverse osmosis water tank is sent to a neutralization reaction tank;
(4) adding a neutralizing agent into the reduction reaction tank, and adjusting the pH value of the solution to 3-5.5;
(5) the wastewater is neutralized, oxidized, coagulated, precipitated and filtered in a water purifier and then is discharged after reaching the standard;
(6) The sludge of the water purifier is conveyed to a sludge dewatering machine by a pump for filter pressing, the sludge cake is handed to a sanitation department for treatment, and the filtrate returns to a regulating tank for retreatment.
Preferably, a grid is arranged in front of the adjusting tank in the step (1), so that larger floating objects in water are intercepted, subsequent treatment equipment is protected, and the load of a subsequent treatment system is effectively reduced; set up air mixing system in the equalizing basin, prevent the equalizing basin siltation, simultaneously can be better with waste water misce bene to homogenization quality of water, thin grid adopts the stainless steel, and the grid clearance is 10 mm.
Preferably, in the step (1), the filter is made of a corrosion-resistant 304 stainless steel shell, and the filter stick is made of polypropylene through spray melting.
Preferably, the specific method of step (5) is as follows:
a: adding chemicals before a pump, conveying the chemicals and the wastewater to a cyclone cylinder along the tangential direction by a lifting pump, fully mixing the wastewater and the chemicals by using a vortex principle to generate a neutralization reaction, and performing online control on the adding amount of NaOH by using a pH meter;
b, oxidation reaction, aeration and oxygenation are carried out through an air blower, the pH value is controlled to be more than 8, ferrous iron in the wastewater is rapidly converted into Fe (OH) 3, and coagulation and precipitation are carried out;
c: coagulating sedimentation and filtration, and further removing suspended impurities in the wastewater through the sieving and filtering action, the sedimentation action and the adsorption and coagulation action of the granular media for intercepting pollutants.
compared with the prior art, the invention has the beneficial effects that: the process flow of the invention is simple and flexible, the pickling wastewater flows into the regulating tank after larger particle impurities are removed by the grating, the pickling wastewater is lifted to the chemical water purifier by the pump after the water quality and the water amount are balanced by the regulating tank, meanwhile, NaOH solution is added by the dosing device, the wastewater is neutralized, oxidized, coagulates, deposits and filtered in the water purifier and then is discharged after reaching the standard, the sludge of the water purifier is conveyed to the sludge dewatering machine by the pump for filter pressing, the sludge cake is recycled to the sanitation department for treatment, the filtrate returns to the regulating tank for retreatment, the occupied area is small, the treatment effect is good, the operation cost is low, and the invention can be widely applied.
Detailed Description
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: a steel mill pickling wastewater treatment process comprises the following steps:
(1) the steel pickling wastewater is homogenized by a regulating tank and then enters a security filter, and after primary filtration, the steel pickling wastewater enters an ultrafiltration membrane component for ultrafiltration membrane filtration to remove insoluble impurities in water;
(2) The steel pickling wastewater filtered by the ultrafiltration membrane is sent to a first-stage reverse osmosis water tank by a pressure pump for reverse osmosis filtration treatment, the effluent of the first-stage reverse osmosis water tank is sent to a second-stage reverse osmosis water tank by the pressure pump, and the effluent of the second-stage reverse osmosis water tank enters a clean water tank;
(3) high-concentration salt solution in the first reverse osmosis water tank and the second reverse osmosis water tank is sent to a neutralization reaction tank;
(4) adding a neutralizing agent into the reduction reaction tank, and adjusting the pH value of the solution to 3-5.5;
(5) the wastewater is neutralized, oxidized, coagulated, precipitated and filtered in a water purifier and then is discharged after reaching the standard;
(6) The sludge of the water purifier is conveyed to a sludge dewatering machine by a pump for filter pressing, the sludge cake is handed to a sanitation department for treatment, and the filtrate returns to a regulating tank for retreatment.
preferably, a grid is arranged in front of the adjusting tank in the step (1), so that larger floating objects in water are intercepted, subsequent treatment equipment is protected, and the load of a subsequent treatment system is effectively reduced; set up air mixing system in the equalizing basin, prevent the equalizing basin siltation, simultaneously can be better with waste water misce bene to homogenization quality of water, thin grid adopts the stainless steel, and the grid clearance is 10 mm.
preferably, in the step (1), the filter is made of a corrosion-resistant 304 stainless steel shell, and the filter stick is made of polypropylene through spray melting.
Preferably, the specific method of step (5) is as follows:
a: adding chemicals before a pump, conveying the chemicals and the wastewater to a cyclone cylinder along the tangential direction by a lifting pump, fully mixing the wastewater and the chemicals by using a vortex principle to generate a neutralization reaction, and performing online control on the adding amount of NaOH by using a pH meter;
b, oxidation reaction, aeration and oxygenation are carried out through an air blower, the pH value is controlled to be more than 8, ferrous iron in the wastewater is rapidly converted into Fe (OH) 3, and coagulation and precipitation are carried out;
c: coagulating sedimentation and filtration, and further removing suspended impurities in the wastewater through the sieving and filtering action, the sedimentation action and the adsorption and coagulation action of the granular media for intercepting pollutants.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. a steel mill pickling wastewater treatment process is characterized in that: the method comprises the following steps:
(1) the steel pickling wastewater is homogenized by a regulating tank and then enters a security filter, and after primary filtration, the steel pickling wastewater enters an ultrafiltration membrane component for ultrafiltration membrane filtration to remove insoluble impurities in water;
(2) the steel pickling wastewater filtered by the ultrafiltration membrane is sent to a first-stage reverse osmosis water tank by a pressure pump for reverse osmosis filtration treatment, the effluent of the first-stage reverse osmosis water tank is sent to a second-stage reverse osmosis water tank by the pressure pump, and the effluent of the second-stage reverse osmosis water tank enters a clean water tank;
(3) high-concentration salt solution in the first reverse osmosis water tank and the second reverse osmosis water tank is sent to a neutralization reaction tank;
(4) Adding a neutralizing agent into the reduction reaction tank, and adjusting the pH value of the solution to 3-5.5;
(5) The wastewater is neutralized, oxidized, coagulated, precipitated and filtered in a water purifier and then is discharged after reaching the standard;
(6) the sludge of the water purifier is conveyed to a sludge dewatering machine by a pump for filter pressing, the sludge cake is handed to a sanitation department for treatment, and the filtrate returns to a regulating tank for retreatment.
2. The steel mill pickling wastewater treatment process according to claim 1, characterized in that: a grid is arranged in front of the adjusting tank in the step (1), so that larger floating objects in water are intercepted, subsequent treatment equipment is protected, and the load of a subsequent treatment system is effectively reduced; set up air mixing system in the equalizing basin, prevent the equalizing basin siltation, simultaneously can be better with waste water misce bene to homogenization quality of water, thin grid adopts the stainless steel, and the grid clearance is 10 mm.
3. The steel mill pickling wastewater treatment process according to claim 1, characterized in that: in the step (1), the security filter adopts a corrosion-resistant 304 stainless steel shell, and the filter stick is made of polypropylene by spray melting.
4. The steel mill pickling wastewater treatment process according to claim 1, characterized in that: the specific method of the step (5) is as follows:
a: adding chemicals before a pump, conveying the chemicals and the wastewater to a cyclone cylinder along the tangential direction by a lifting pump, fully mixing the wastewater and the chemicals by using a vortex principle to generate a neutralization reaction, and performing online control on the adding amount of NaOH by using a pH meter;
b, oxidation reaction, aeration and oxygenation are carried out through an air blower, the pH value is controlled to be more than 8, ferrous iron in the wastewater is rapidly converted into Fe (OH) 3, and coagulation and precipitation are carried out;
c: coagulating sedimentation and filtration, and further removing suspended impurities in the wastewater through the sieving and filtering action, the sedimentation action and the adsorption and coagulation action of the granular media for intercepting pollutants.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810458598.7A CN110550757A (en) | 2018-05-15 | 2018-05-15 | pickling wastewater treatment process for steel mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810458598.7A CN110550757A (en) | 2018-05-15 | 2018-05-15 | pickling wastewater treatment process for steel mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110550757A true CN110550757A (en) | 2019-12-10 |
Family
ID=68733624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810458598.7A Pending CN110550757A (en) | 2018-05-15 | 2018-05-15 | pickling wastewater treatment process for steel mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110550757A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111925011A (en) * | 2020-08-07 | 2020-11-13 | 云南玉溪玉昆钢铁集团有限公司 | Environment-friendly sewage recycling equipment based on steel mill |
| CN116217019A (en) * | 2023-05-09 | 2023-06-06 | 生态环境部华南环境科学研究所(生态环境部生态环境应急研究所) | Device and method for purifying mine acidic wastewater |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001212433A (en) * | 2000-02-02 | 2001-08-07 | Toray Eng Co Ltd | Pretreating device for raw water fed to reverse osmosis membrane treating device |
| CN101205105A (en) * | 2007-12-18 | 2008-06-25 | 中国兵器工业第五二研究所 | Regeneration treatment and cyclic utilization method of printing and dyeing wastewater |
| CN103159366A (en) * | 2011-12-08 | 2013-06-19 | 沈阳工业大学 | Method of treating copper-containing alkaline wastewater of printed circuit board with integrated membranes |
| CN203999258U (en) * | 2014-10-15 | 2014-12-10 | 天津诚泰来环境工程设备有限公司 | The integrated Sewage treatment systems in a kind of cement mill |
| CN105923852A (en) * | 2016-05-26 | 2016-09-07 | 淮安市丰立德环保科技有限公司 | Steel pickling waste water treating process |
| CN106698738A (en) * | 2015-11-17 | 2017-05-24 | 哈尔滨皓威伟业科技发展有限公司 | Integrated water purifier based pickling waste water treatment |
| CN106745917A (en) * | 2015-11-19 | 2017-05-31 | 哈尔滨皓威伟业科技发展有限公司 | The process for purifying water of physics and chemistry water purifier at a kind of pickling waste waters |
| CN107827286A (en) * | 2017-11-30 | 2018-03-23 | 宁波中骏森驰汽车零部件股份有限公司 | A kind of electroplating wastewater recovery process and electroplating wastewater reclaimer |
-
2018
- 2018-05-15 CN CN201810458598.7A patent/CN110550757A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001212433A (en) * | 2000-02-02 | 2001-08-07 | Toray Eng Co Ltd | Pretreating device for raw water fed to reverse osmosis membrane treating device |
| CN101205105A (en) * | 2007-12-18 | 2008-06-25 | 中国兵器工业第五二研究所 | Regeneration treatment and cyclic utilization method of printing and dyeing wastewater |
| CN103159366A (en) * | 2011-12-08 | 2013-06-19 | 沈阳工业大学 | Method of treating copper-containing alkaline wastewater of printed circuit board with integrated membranes |
| CN203999258U (en) * | 2014-10-15 | 2014-12-10 | 天津诚泰来环境工程设备有限公司 | The integrated Sewage treatment systems in a kind of cement mill |
| CN106698738A (en) * | 2015-11-17 | 2017-05-24 | 哈尔滨皓威伟业科技发展有限公司 | Integrated water purifier based pickling waste water treatment |
| CN106745917A (en) * | 2015-11-19 | 2017-05-31 | 哈尔滨皓威伟业科技发展有限公司 | The process for purifying water of physics and chemistry water purifier at a kind of pickling waste waters |
| CN105923852A (en) * | 2016-05-26 | 2016-09-07 | 淮安市丰立德环保科技有限公司 | Steel pickling waste water treating process |
| CN107827286A (en) * | 2017-11-30 | 2018-03-23 | 宁波中骏森驰汽车零部件股份有限公司 | A kind of electroplating wastewater recovery process and electroplating wastewater reclaimer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111925011A (en) * | 2020-08-07 | 2020-11-13 | 云南玉溪玉昆钢铁集团有限公司 | Environment-friendly sewage recycling equipment based on steel mill |
| CN116217019A (en) * | 2023-05-09 | 2023-06-06 | 生态环境部华南环境科学研究所(生态环境部生态环境应急研究所) | Device and method for purifying mine acidic wastewater |
| CN116217019B (en) * | 2023-05-09 | 2023-07-21 | 生态环境部华南环境科学研究所(生态环境部生态环境应急研究所) | Device and method for purifying mine acidic wastewater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101475269B (en) | Comprehensive treating and recycling method for steel wastewater and apparatus thereof | |
| CN107253798B (en) | Advanced treatment and reuse combined process for steel industrial wastewater | |
| CN102849879A (en) | Treatment technology for recycling reverse osmosis concentrated water | |
| CN112811701A (en) | Method for treating carbonate-containing wastewater | |
| CN202744400U (en) | System for recycling electroplating wastewater and heavy metal ions | |
| CN110981000A (en) | Method for treating silicon steel magnesium oxide wastewater | |
| CN110550757A (en) | pickling wastewater treatment process for steel mill | |
| CN111153531A (en) | Liquid crystal display panel production plant fluorine-containing wastewater treatment device and process | |
| CN108793568A (en) | A kind of stainless steel cleaning containing acid wastewater zero discharge waste water unit equipment | |
| CN210656480U (en) | Adopt washing cigarette waste water retrieval and utilization processing apparatus of DTRO device | |
| CN111875142A (en) | Zero discharge system and process for salt-containing wastewater of power plant | |
| CN111500803A (en) | Hot-disintegrating treatment device and method for recycling strong brine in steel slag | |
| CN110980883A (en) | Method for removing divalent ions in water by whole membrane method | |
| CN209193669U (en) | Low dosage and high-recovery steel mill comprehensive sewage treatment system | |
| CN206692476U (en) | A kind of pickling waste waters treatment for reuse system | |
| CN211419839U (en) | Industrial circulating water drainage recycling treatment device | |
| CN212270140U (en) | Strong brine is recycled and is used for slag hot stuffy processing apparatus | |
| CN211394158U (en) | Electroplating effluent zero release sewage treatment plant | |
| CN210764746U (en) | Adopt washing cigarette waste water retrieval and utilization processing apparatus of STRO device | |
| CN112939368A (en) | Circulating water sewage treatment and recycling method with high desalting rate | |
| CN201338971Y (en) | Iron and steel integrated waste water treating and reusing equipment | |
| CN201873589U (en) | Advanced treatment and recycle device for papermaking wastewater | |
| CN219991360U (en) | Circulating water sand filtration backwash water treatment device | |
| CN212770193U (en) | Organic tubular membrane waste acid recovery filtration processing system | |
| CN114291951B (en) | Recycling process and system for quenching water of cold-rolled electrotinning unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191210 |