CN112607901A - Comprehensive wastewater treatment system and method for steel industry - Google Patents
Comprehensive wastewater treatment system and method for steel industry Download PDFInfo
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- CN112607901A CN112607901A CN202011425697.9A CN202011425697A CN112607901A CN 112607901 A CN112607901 A CN 112607901A CN 202011425697 A CN202011425697 A CN 202011425697A CN 112607901 A CN112607901 A CN 112607901A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 55
- 239000010959 steel Substances 0.000 title claims abstract description 55
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 142
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 52
- 239000012528 membrane Substances 0.000 claims abstract description 34
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 33
- 239000002351 wastewater Substances 0.000 claims abstract description 33
- 238000001914 filtration Methods 0.000 claims abstract description 30
- 238000005352 clarification Methods 0.000 claims abstract description 23
- 239000010802 sludge Substances 0.000 claims description 33
- 238000010612 desalination reaction Methods 0.000 claims description 27
- 239000010865 sewage Substances 0.000 claims description 24
- 238000005273 aeration Methods 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 238000005374 membrane filtration Methods 0.000 claims description 15
- 238000004062 sedimentation Methods 0.000 claims description 15
- 238000005345 coagulation Methods 0.000 claims description 10
- 230000015271 coagulation Effects 0.000 claims description 10
- 238000011045 prefiltration Methods 0.000 claims description 10
- 239000002699 waste material Substances 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 238000005189 flocculation Methods 0.000 claims description 7
- 230000016615 flocculation Effects 0.000 claims description 7
- 238000000265 homogenisation Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
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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
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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
- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- 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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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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
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
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- Water Supply & Treatment (AREA)
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- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a comprehensive wastewater treatment system in the steel industry and a method thereof, wherein the comprehensive wastewater treatment system in the steel industry comprises a water quality adjusting unit (1), a magnetic medium clarifying unit (2), an ultrafiltration membrane filtering unit (3) and a reverse osmosis desalting unit (5) which are sequentially arranged, the magnetic medium clarifying unit (2) can add a magnetic medium into the primarily filtered and homogenized wastewater to obtain magnetic medium treated clear water, and the ultrafiltration membrane filtering unit (3) can filter the magnetic medium treated clear water to obtain ultrafiltration membrane filtered clear water. The comprehensive wastewater treatment system and the method thereof in the steel industry replace the traditional filtering equipment by adopting the magnetic medium clarification unit and the ultrafiltration membrane filtering unit, shorten the process flow on the premise of ensuring the wastewater treatment effect, greatly reduce the power consumption and the medicine consumption of the wastewater treatment system, save land resources, are simple and convenient to operate and maintain, and have the advantages of environmental protection and low carbon.
Description
Technical Field
The invention relates to the technical field of comprehensive wastewater treatment in the steel industry, in particular to a comprehensive wastewater treatment system in the steel industry and a comprehensive wastewater treatment method in the steel industry.
Background
The comprehensive sewage treatment and recycling in the steel industry is an effective water-saving measure which accords with the national conditions of China and the development characteristics of steel enterprises, the comprehensive sewage amount of the steel enterprises accounts for 40 percent of the new water consumption of the enterprises, and the water is collected, treated and recycled, so that the water resource reuse rate of the enterprises can be greatly improved, and the new water consumption per ton of steel can be reduced. In 2000, nowadays, more and more iron and steel enterprises are in dispute to build comprehensive wastewater treatment facilities, and the existing process flow is generally 'regulating tank → high-density clarification tank → V-shaped filter tank → multi-media filter → pressure type ultrafiltration device → reverse osmosis device → water supply pump station', so that the defects of the process flow are long, the process is complex, the operation load is low, the occupied area is large, and the capacity of the process for dealing with the change of water quality and water quantity of raw water is insufficient.
Disclosure of Invention
The invention provides a comprehensive wastewater treatment system and a method thereof in the steel industry, aiming at solving the problem of low comprehensive wastewater treatment efficiency in the steel industry, the comprehensive wastewater treatment system and the method thereof in the steel industry adopt a magnetic medium clarification unit and an ultrafiltration membrane filtration unit as a reverse osmosis pretreatment process to replace a traditional high-density clarification tank → a V-shaped filter tank → a multi-medium filter → a pressure type ultrafiltration device, and on the premise of ensuring the wastewater treatment effect, the process flow is shortened, the power consumption and the medicine consumption of the wastewater treatment system are greatly reduced, the land resource is saved, the operation and the maintenance are simple and convenient, and the comprehensive wastewater treatment system has the advantages of environmental protection and low carbon.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a wastewater treatment system is synthesized to steel industry, including the quality of water regulating unit that sets gradually, magnetic medium clarification unit, milipore filter filtering unit and reverse osmosis desalination unit, quality of water regulating unit can synthesize waste water to steel industry and carry out prefiltration and water homogeneity processing and obtain prefiltration and homogeneity waste water, magnetic medium clarification unit can add magnetic medium and obtain the magnetic medium and handle the clear water to this prefiltration and homogeneity waste water, milipore filter filtering unit can handle the clear water to this magnetic medium and filter and obtain the milipore filter and filter the clear water, reverse osmosis desalination unit can filter the clear water to this milipore filter and obtain reverse osmosis desalination clear water.
The water quality adjusting unit comprises a grid filtering device, an aeration oil removal tank and a homogeneity adjusting tank which are arranged in sequence, wherein an aeration pipe is arranged in the aeration oil removal tank, and a stirring device is arranged in the homogeneity adjusting tank.
The grid filtering equipment comprises a coarse grid sewage interception equipment and a fine grid sewage interception equipment, wherein the coarse grid sewage interception equipment, the fine grid sewage interception equipment and the aeration oil removal tank are sequentially arranged.
The water quality adjusting unit also comprises a water pump room, an aeration oil removal tank, a homogeneous adjusting tank and the water pump room which are arranged in sequence.
The magnetic medium clarification unit contains coagulation reaction tank, flocculation reaction tank, sedimentation tank and pH equalizing basin that sets gradually, and the pH equalizing basin can adjust the pH value of sedimentation tank exhaust sedimentation tank clear water.
The magnetic medium clarification unit also comprises sludge separation equipment and magnetic medium backflow equipment, wherein the sludge separation equipment can separate the magnetic sludge discharged from the sedimentation tank into waste sludge and a magnetic medium, and the magnetic medium backflow equipment can put the magnetic medium into the coagulation reaction tank.
The magnetic medium clarification unit also contains a sludge delivery device which can transport the waste sludge away.
The ultrafiltration membrane filtration unit comprises a water distribution channel and an ultrafiltration membrane pool which are arranged in sequence, and the ultrafiltration membrane pool comprises an immersed ultrafiltration membrane device.
The comprehensive wastewater treatment system in the steel industry further comprises an intermediate water tank and a water supply unit, wherein the ultrafiltration membrane filtering unit, the intermediate water tank, the reverse osmosis desalination unit and the water supply unit are sequentially arranged.
The comprehensive wastewater treatment method for the steel industry adopts the comprehensive wastewater treatment system for the steel industry, and comprises the following steps:
step 1, carrying out primary filtration and water homogenization treatment on the comprehensive wastewater in the steel industry by a water quality adjusting unit to obtain primary filtration and homogenized wastewater;
and 4, filtering the clear water by the ultrafiltration membrane through a reverse osmosis desalination unit to obtain reverse osmosis desalinated clear water.
The invention has the beneficial effects that: the comprehensive wastewater treatment system and the method for the steel industry shorten the process flow, greatly reduce the power consumption and the medicine consumption of the wastewater treatment system, save land resources, are simple and convenient to operate and maintain, and have the advantages of environmental friendliness and low carbon on the premise of ensuring the wastewater treatment effect.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic view of the integrated wastewater treatment system for the steel industry according to the present invention.
Fig. 2 is a schematic diagram of a water quality adjusting unit.
FIG. 3 is a schematic diagram of a magnetic media clarification unit.
FIG. 4 is a schematic diagram of an ultrafiltration membrane filtration unit.
FIG. 5 is a schematic flow chart of the comprehensive wastewater treatment method in the steel industry according to the invention.
1. A water quality adjusting unit; 2. a magnetic media clarification unit; 3. an ultrafiltration membrane filtration unit; 4. a middle water tank; 5. a reverse osmosis desalination unit; 6. a water supply unit;
11. coarse grid sewage interception equipment; 12. fine grid sewage interception equipment; 13. an aeration oil removal tank; 14. a homogenizing adjusting tank; 15. a water pump house;
21. a coagulation reaction tank; 22. a flocculation reaction tank; 23. a sedimentation tank; 24. a pH adjusting tank; 25. a sludge separation device; 26. a magnetic media reflow apparatus; 27. sludge delivery equipment;
31. a water distribution channel; 32. an ultrafiltration membrane tank; 33. an immersed ultrafiltration membrane device.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The utility model provides a steel industry synthesizes effluent disposal system, including the quality of water regulating unit 1 that sets gradually, magnetic medium clarification unit 2, milipore filter unit 3 and reverse osmosis desalination unit 5, quality of water regulating unit 1 can carry out prefiltration and water homogeneity to steel industry comprehensive waste water and obtain prefiltration and homogeneity waste water, quality of water regulating unit 1 also can be called prefiltration and quality of water regulating unit, magnetic medium clarification unit 2 can add magnetic medium and obtain magnetic medium treatment clear water to this prefiltration and homogeneity waste water, milipore filter unit 3 can handle the clear water to this magnetic medium and filter and obtain the milipore filter clear water, reverse osmosis desalination unit 5 can filter the clear water to this milipore filter and obtain the reverse osmosis desalination clear water, as shown in figure 1.
The comprehensive wastewater treatment system in the steel industry adopts the magnetic medium clarification unit 2 and the ultrafiltration membrane filtration unit 3 as a reverse osmosis pretreatment process to replace the traditional high-density clarification tank → the V-shaped filter tank → the multi-medium filter → the pressure type ultrafiltration device, shortens the process flow on the premise of ensuring the wastewater treatment effect, greatly reduces the power consumption and the medicine consumption of the wastewater treatment system, saves land resources, is simple and convenient to operate and maintain, and has the advantages of environmental protection and low carbon.
In this embodiment, the water quality adjusting unit 1 includes a grating filtering device, an aeration oil removing tank 13 and a homogeneity adjusting tank 14, which are sequentially arranged, an aeration pipe is arranged at the bottom of the aeration oil removing tank 13, a stirring device is arranged in the homogeneity adjusting tank 14, and the aeration oil removing tank 13 and the homogeneity adjusting tank 14 can adopt products of the prior art.
The aeration pipe in the aeration degreasing tank 13 sprays tiny bubbles, and the tiny bubbles float and separate out to become carriers, so that pollutant substances such as emulsified oil, tiny suspended particles and the like in the comprehensive wastewater in the steel industry are adhered to the bubbles and float to the water surface along with the bubbles to form a foam-gas, water and particle (oil) three-phase mixture, and the water body purification is realized by collecting the foam or scum.
The effluent of the aeration oil removal tank 13 enters a homogenizing adjusting tank 14, the main function of the homogenizing adjusting tank 14 is water homogenization, the fluctuation of the water quality of subsequent water treatment units is reduced, the homogenizing adjusting tank 14 is of a cellular structure, namely the homogenizing adjusting tank 14 comprises a plurality of independent and parallel containing cells, the operation of another cell can be realized when one cell is maintained, and the mixing homogenizing effect of the adjusting tank can be ensured by a stirring device in the homogenizing adjusting tank 14.
In the present embodiment, the grid filtering apparatus comprises a coarse grid sewage intercepting apparatus 11, a fine grid sewage intercepting apparatus 12 and a water pump house 15, wherein the coarse grid sewage intercepting apparatus 11, the fine grid sewage intercepting apparatus 12, the aeration oil removing tank 13, the homogenizing adjusting tank 14 and the water pump house 15 are arranged in sequence, as shown in fig. 2. The coarse grid sewage interception device 11, the fine grid sewage interception device 12 and the water pump room 15 can all adopt products in the prior art.
The thick grating sewage intercepting equipment 11 can remove sundries such as branches and plastic bags with large sizes in water, and the thin grating sewage intercepting equipment 12 can remove sundries such as branches and plastic bags with small sizes in water. The water pump room 15 contains a water pump, and the water discharged from the cellular homogenizing adjusting tank 14 is pressurized and conveyed to a subsequent water treatment unit through the water pump room 15.
In the present embodiment, the magnetic medium clarifying unit 2 may be a product of the prior art, such as "a magnetic flocculation water body purification apparatus" disclosed in chinese patent document CN 109467171 a, published 3, 15, 2019. The magnetic medium clarification unit 2 contains a coagulation reaction tank 21, a flocculation reaction tank 22, a sedimentation tank 23 and a pH adjusting tank 24 which are arranged in sequence, wherein the pH adjusting tank 24 contains an acid-base agent adding device, and the pH adjusting tank 24 can adjust the pH value of sedimentation tank clear water discharged from the sedimentation tank 23.
In this embodiment, the magnetic medium clarifying unit 2 further includes a sludge separating device 25 and a magnetic medium returning device 26, the sludge separating device 25 can separate the magnetic sludge discharged from the settling tank 23 into waste sludge and magnetic media, and the magnetic medium returning device 26 can feed the magnetic media into the coagulation reaction tank 21.
In this embodiment, the magnetic media clarification unit 2 also contains a sludge export device 27, which sludge export device 27 is able to transport away the waste sludge for further treatment of the waste sludge. The pH adjusting tank 24, the sludge separating device 25, the magnetic medium refluxing device 26 and the sludge sending device 27 can all adopt products in the prior art, as shown in figure 3.
In this embodiment, the ultrafiltration membrane filtration unit 3 comprises a distribution channel 31 and an ultrafiltration membrane tank 32 which are arranged in sequence, and the ultrafiltration membrane tank 32 comprises an immersed ultrafiltration membrane device 33. The magnetic medium treated clean water obtained after the treatment of the magnetic medium clarifying unit 2 sequentially enters the water distribution channel 31 and the ultrafiltration membrane tank 32. The magnetic medium treated clean water firstly enters the ultrafiltration membrane tank 32, is filtered by the immersed ultrafiltration membrane device 33 and then is discharged, as shown in fig. 4.
In this embodiment, the comprehensive wastewater treatment system in the steel industry further comprises an intermediate water tank 4 and a water supply unit 6, wherein the ultrafiltration membrane filtration unit 3, the intermediate water tank 4, the reverse osmosis desalination unit 5 and the water supply unit 6 are sequentially arranged. The function of the middle water tank 4 is to make the ultrafiltration membrane obtained by the ultrafiltration membrane filtration unit 3 filter clear water, precipitate and clarify, the reverse osmosis desalination unit 5 can adopt the product of the prior art, the water supply unit 6 contains a water pump, and the water supply unit 6 can send the reverse osmosis desalination clear water obtained by the reverse osmosis desalination unit 5 to the user, as shown in fig. 1.
The disinfection unit can be arranged between the reverse osmosis desalination unit 5 and the water supply unit 6, the disinfection unit can disinfect the reverse osmosis desalination clear water, the disinfection mode adopted by the disinfection unit can be a chemical mode or a physical mode, the chemical mode can be disinfection by adding a disinfectant, the physical mode can be ultraviolet disinfection, and the disinfection unit can adopt products in the prior art.
The working process of the comprehensive wastewater treatment system in the steel industry is described below.
The comprehensive wastewater in the steel industry sequentially flows through a coarse grid sewage interception device 11, a fine grid sewage interception device 12, an aeration oil removal tank 13, a homogenizing adjusting tank 14, a water pump room 15, a coagulation reaction tank 21, a flocculation reaction tank 22, a sedimentation tank 23, a pH adjusting tank 24, a water distribution channel 31, an ultrafiltration membrane tank 32, an immersed ultrafiltration membrane device 33, an intermediate water tank 4, a reverse osmosis desalination unit 5 and a water supply unit 6.
In the water quality adjusting unit 1, the coarse grid sewage intercepting equipment 11 and the fine grid sewage intercepting equipment 12 can filter sundries such as branches and plastic bags in the comprehensive wastewater in the steel industry, the aeration oil removal tank 13 can remove oil in the comprehensive wastewater in the steel industry, the homogenizing adjusting tank 14 enables water to be homogenized, and the water quality adjusting unit 1 is used for primarily filtering and homogenizing the comprehensive wastewater in the steel industry to obtain primarily filtered and homogenized wastewater.
In the magnetic medium clarifying unit 2, the primary filtered and homogenized wastewater and the magnetic medium react in the coagulation reaction tank 21 and the flocculation reaction tank 22 in sequence to generate a mixed solution of treated water and magnetic sludge, the mixed solution of treated water and magnetic sludge is precipitated and separated in the sedimentation tank 23, the treated water enters the pH adjusting tank 24, and acid liquor or alkali liquor is added into the pH adjusting tank 24 as required to enable the pH value of the liquid in the pH adjusting tank 24 to reach a required value.
The sludge separation equipment 25 separates the magnetic sludge discharged from the sedimentation tank 23 into waste sludge and magnetic media, the magnetic media are put into the coagulation reaction tank 21 by the magnetic media backflow equipment 26 for reuse, and the waste sludge is transported away from the comprehensive wastewater treatment system in the steel industry by the sludge delivery equipment 27, so that the waste sludge is further treated. The magnetic medium clarifying unit 2 adds a magnetic medium into the preliminary filtering and homogenizing wastewater to obtain magnetic medium treated clear water.
In the ultrafiltration membrane filtration unit 3, the water distribution channel 31 introduces the magnetic medium treated clean water into the ultrafiltration membrane tank 32, the magnetic medium treated clean water firstly enters the ultrafiltration membrane tank 32 and is discharged after being filtered by the immersed ultrafiltration membrane device 33, and the ultrafiltration membrane filtration unit 3 filters the magnetic medium treated clean water to obtain ultrafiltration membrane filtered clean water.
The clear water filtered by the ultrafiltration membrane enters the intermediate water tank 4 for precipitation, the clear water at the upper layer after precipitation enters the reverse osmosis desalination unit 5, the reverse osmosis desalination unit 5 carries out desalination and filtration on the clear water filtered by the ultrafiltration membrane to obtain reverse osmosis desalination clear water, and the water supply unit 6 can send the reverse osmosis desalination clear water to users.
The method for treating the comprehensive wastewater in the steel industry is introduced below, the method for treating the comprehensive wastewater in the steel industry adopts the system for treating the comprehensive wastewater in the steel industry, and the method for treating the comprehensive wastewater in the steel industry comprises the following steps:
step 1, carrying out primary filtration and water homogenization treatment on the comprehensive wastewater in the steel industry by a water quality adjusting unit 1 to obtain primary filtration and homogenized wastewater;
and 4, filtering the clear water by the ultrafiltration membrane through a reverse osmosis desalination unit 5 to obtain reverse osmosis desalinated clear water, as shown in figure 5.
The above description is only exemplary of the invention and should not be taken as limiting the scope of the invention, so that the invention is intended to cover all modifications and equivalents of the embodiments described herein. In addition, the technical features and the technical schemes, and the technical schemes can be freely combined and used.
Claims (10)
1. The utility model provides a wastewater treatment system is synthesized to steel industry, a serial communication port, wastewater treatment system is synthesized to steel industry is including the quality of water regulating unit (1), magnetic medium clarification unit (2), milipore filter unit (3) and reverse osmosis desalination unit (5) that set gradually, quality of water regulating unit (1) can be synthesized waste water to steel industry and is carried out prefiltration and water homogeneity processing and obtain prefiltration and homogeneity waste water, magnetic medium clarification unit (2) can add magnetic medium and obtain magnetic medium treatment clear water in to this prefiltration and homogeneity waste water, milipore filter unit (3) can be filtered this magnetic medium treatment clear water and obtain the milipore filter clear water, reverse osmosis desalination unit (5) can filter the clear water and obtain the reverse osmosis desalination clear water to this milipore filter.
2. The integrated wastewater treatment system in the steel industry according to claim 1, wherein the water quality adjusting unit (1) comprises a grating filter device, an aeration oil removal tank (13) and a homogenization adjusting tank (14) which are arranged in sequence, an aeration pipe is arranged in the aeration oil removal tank (13), and a stirring device is arranged in the homogenization adjusting tank (14).
3. The integrated wastewater treatment system for the steel industry according to claim 2, wherein the grid filtering device comprises a coarse grid sewage interception device (11) and a fine grid sewage interception device (12), and the coarse grid sewage interception device (11), the fine grid sewage interception device (12) and the aeration oil removal tank (13) are arranged in sequence.
4. The integrated wastewater treatment system in the steel industry according to claim 2, wherein the water quality adjusting unit (1) further comprises a water pump room (15), the aeration oil removal tank (13), the homogenizing adjusting tank (14) and the water pump room (15) are arranged in sequence.
5. The comprehensive wastewater treatment system in the steel industry according to claim 1, wherein the magnetic medium clarification unit (2) comprises a coagulation reaction tank (21), a flocculation reaction tank (22), a sedimentation tank (23) and a pH adjusting tank (24) which are arranged in sequence, and the pH adjusting tank (24) can adjust the pH value of the sedimentation tank clear water discharged from the sedimentation tank (23).
6. The integrated wastewater treatment system in the steel industry according to claim 5, wherein the magnetic medium clarification unit (2) further comprises a sludge separation device (25) and a magnetic medium reflux device (26), the sludge separation device (25) can separate the magnetic sludge discharged from the sedimentation tank (23) into waste sludge and magnetic medium, and the magnetic medium reflux device (26) can feed the magnetic medium into the coagulation reaction tank (21).
7. The integrated wastewater treatment system in the steel industry according to claim 6, characterized in that the magnetic medium clarification unit (2) further comprises a sludge transporting device (27), and the sludge transporting device (27) can transport the waste sludge away.
8. The integrated wastewater treatment system in the steel industry according to claim 1, wherein the ultrafiltration membrane filtration unit (3) comprises a water distribution channel (31) and an ultrafiltration membrane tank (32) which are arranged in sequence, and the ultrafiltration membrane tank (32) comprises an immersed ultrafiltration membrane device (33).
9. The integrated wastewater treatment system for the steel industry as recited in claim 1, further comprising an intermediate water tank (4) and a water supply unit (6), wherein the ultrafiltration membrane filtration unit (3), the intermediate water tank (4), the reverse osmosis desalination unit (5) and the water supply unit (6) are sequentially arranged.
10. A method for treating comprehensive wastewater in the steel industry, which is characterized by adopting the system for treating comprehensive wastewater in the steel industry of claim 1, and comprises the following steps:
step 1, carrying out primary filtration and water homogenization treatment on the comprehensive wastewater in the steel industry by a water quality adjusting unit (1) to obtain primary filtration and homogenized wastewater;
step 2, adding a magnetic medium into the preliminary filtration and homogenization wastewater by a magnetic medium clarification unit (2) to obtain magnetic medium treatment clear water;
step 3, an ultrafiltration membrane filtering unit (3) filters the magnetic medium treatment clear water to obtain ultrafiltration membrane filtration clear water;
and 4, filtering the clear water by the ultrafiltration membrane through a reverse osmosis desalination unit (5) to obtain reverse osmosis desalinated clear water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011425697.9A CN112607901A (en) | 2020-12-09 | 2020-12-09 | Comprehensive wastewater treatment system and method for steel industry |
Applications Claiming Priority (1)
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| WO2024028751A1 (en) * | 2022-08-01 | 2024-02-08 | TEC Austria GmbH | Device and method for reconditioning fat-laden waste water |
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