CN114031231A - Steel mill passive waste water membrane concentration integrated system - Google Patents
Steel mill passive waste water membrane concentration integrated system Download PDFInfo
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- CN114031231A CN114031231A CN202111144527.8A CN202111144527A CN114031231A CN 114031231 A CN114031231 A CN 114031231A CN 202111144527 A CN202111144527 A CN 202111144527A CN 114031231 A CN114031231 A CN 114031231A
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- 239000012528 membrane Substances 0.000 title claims abstract description 76
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 24
- 239000010959 steel Substances 0.000 title claims abstract description 24
- 239000002351 wastewater Substances 0.000 title claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 47
- 238000001223 reverse osmosis Methods 0.000 claims description 24
- 238000002425 crystallisation Methods 0.000 claims description 20
- 230000008025 crystallization Effects 0.000 claims description 20
- 239000013505 freshwater Substances 0.000 claims description 20
- 238000001704 evaporation Methods 0.000 claims description 17
- 230000008020 evaporation Effects 0.000 claims description 17
- 238000002161 passivation Methods 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 12
- 239000003814 drug Substances 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 4
- 238000005345 coagulation Methods 0.000 abstract description 12
- 230000015271 coagulation Effects 0.000 abstract description 12
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000004065 wastewater treatment Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 18
- 238000005516 engineering process Methods 0.000 description 17
- 230000008569 process Effects 0.000 description 15
- 238000000926 separation method Methods 0.000 description 8
- 239000013078 crystal Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000001471 micro-filtration Methods 0.000 description 2
- 238000001728 nano-filtration Methods 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000002605 large molecules Chemical class 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Images
Classifications
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- 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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
The invention belongs to the field of steel mill wastewater treatment, in particular to a steel mill passive wastewater membrane concentration integrated system, which aims at solving the problems that the existing steel mill passive wastewater membrane concentration treatment system needs to be carried out under the state of higher pressure, has high energy consumption, limited application range, complex structure, large occupied area, more complicated operation and inconvenient maintenance and overhaul, and the invention provides the following scheme, which comprises a coagulation tank, wherein the interior of the coagulation tank is hermetically communicated with a pipeline mixer, the interior of the pipeline mixer is hermetically communicated with a dosing system, the right side of the coagulation tank is provided with a liquid pump, the input end of the liquid pump is hermetically communicated with the interior of the coagulation tank, the output end of the liquid pump is hermetically communicated with a first circulating pump and a second circulating pump, and the right side of the second circulating pump is provided with a tubular ultrafiltration system, can be carried out under normal pressure, saves energy, is simple and convenient to operate, and is convenient to install and maintain.
Description
Technical Field
The invention relates to the technical field of steel mill wastewater treatment, in particular to a steel mill passive wastewater film concentration integrated system.
Background
The membrane is an inorganic or polymeric porous material with a specific selective separation function, which separates the fluid into two separate parts, one or more of which are permeable to the other. The membrane separation technology has the characteristics of high efficiency, energy conservation, environmental protection, molecular filtration and the like, is widely applied to the fields of medicine, water treatment, chemical industry, electronics, food processing and the like, becomes one of the most important technologies in the separation science of the century, is known as the membrane technology which is one of the most important industrial technologies in the 21 century, and is a new green industrial technology. The membrane separation technology mainly comprises Microfiltration (MF), Ultrafiltration (UF), Nanofiltration (NF), Reverse Osmosis (RO) and the like, is a reverse osmosis membrane which is an important component of the membrane technology, and an element of the reverse osmosis membrane is a porous asymmetric osmosis membrane and is mainly used for separating small molecules and large molecules of substances in a solution at a grade so as to grade, concentrate and purify the substances, the substances are popularized and applied in various industrial fields, and the blunt water wastewater of a steel mill needs to be subjected to membrane concentration treatment.
The existing steel mill passive wastewater film concentration treatment system needs to be carried out in a state of higher pressure, and has the advantages of high energy consumption, limited application range, complex structure, large occupied area, more complicated operation and inconvenience in maintenance and overhaul, so the steel mill passive wastewater film concentration integrated system is provided for solving the problems.
Disclosure of Invention
The invention aims to solve the defects that a steel mill passivation wastewater film concentration treatment system needs to be carried out under a high-pressure state, is high in energy consumption, limited in application range, complex in structure, large in occupied area, relatively complex in operation and inconvenient to maintain and overhaul in the prior art, and provides a steel mill passivation wastewater film concentration integrated system.
In order to achieve the purpose, the invention adopts the following technical scheme:
a steel mill passivation wastewater film concentration integrated system comprises a coagulation tank, wherein the inside of the coagulation tank is hermetically communicated with a pipeline mixer, the inner part of the pipeline mixer is hermetically communicated with a dosing system, the right side of the coagulation tank is provided with a liquid pump, the input end of the liquid pump is communicated with the interior of the coagulation tank in a sealing way, the output end of the liquid pump is communicated with a first circulating pump and a second circulating pump in a sealing way, the right side of the second circulating pump is provided with a tubular ultrafiltration system, the first circulating pump and the second circulating pump are both communicated with the tubular ultrafiltration system in a sealing way, the tubular ultrafiltration system is hermetically communicated with a water storage tank, the water storage tank is hermetically communicated with a reverse osmosis membrane component, the reverse osmosis membrane component is hermetically communicated with a primary membrane concentrated water tank, the right side of the primary membrane concentrated water tank is provided with an MVR evaporation crystallization system, the interior of the MVR evaporation crystallization system is communicated with the interior of the first-level membrane concentrated water tank in a sealing manner.
Preferably, the medicine adding system comprises a medicine adding tank and a medicine adding pump, the input end of the medicine adding pump is communicated with the inner seal of the medicine adding tank, the output end of the medicine adding pump is communicated with the inner seal of the pipeline mixer, a raw water pump is arranged below the pipeline mixer, and the output end of the raw water pump is communicated with the inner seal of the pipeline mixer.
Preferably, the inside of the first-stage membrane concentrated water tank is communicated with the inside of the reverse osmosis membrane component in a sealing manner, and a communicating component is arranged between the first-stage membrane concentrated water tank and the MVR evaporative crystallization system.
Preferably, the intercommunication subassembly includes a pump, and the input of a pump and the inside seal of one-level membrane thick water jar are linked together, the output of a pump and the inside seal of MVR evaporation crystal system are linked together, the right side of a pump is equipped with No. two pumps, and the input of No. two pumps and the inside seal of MVR evaporation crystal system are linked together, the output of No. two pumps and the inside seal of water storage tank are linked together.
Preferably, the right side of MVR evaporation crystallization system is provided with the fresh water jar of membrane No. one and the fresh water jar of membrane No. two, the inside of the fresh water jar of membrane No. one is linked together with the inside seal of reverse osmosis membrane subassembly, and the inside of the fresh water jar of membrane No. two is linked together with the inside seal of reverse osmosis membrane subassembly.
The invention has the beneficial effects that:
the full-film technology comprises the following steps: the technology of ultrafiltration and ultrahigh pressure reverse osmosis membrane is adopted, the whole flow is a physical process, and no phase change and no secondary pollution are caused;
wide application range: the technology can be suitable for salt-containing wastewater with high COD content, in particular passivation wastewater of a steel mill with large water quality fluctuation;
③ ultra-flexible design: the working procedures are divided into a pretreatment softening module, an ultrafiltration module, a membrane concentration module and an MVR evaporation crystallization module, each working procedure module is set into 2 equipment units, and the single unit operation and the double unit combined operation can be realized according to the requirement of the wastewater treatment capacity, so that the free assembly and the flexible application can be realized;
fourthly, the construction period is short: by utilizing the modular design, the independent modules are integrated into a whole in a factory, the field workload is reduced, the container splicing can be realized, the civil construction period is shortened, and the construction period is shortened.
The operation cost is low: the operation cost is greatly reduced by adopting a membrane concentration technology, and the comprehensive investment cost performance is high;
zero discharge of waste water: advanced treatment is carried out through the combination of the RO technology and the MVR evaporative crystallization technology, and zero discharge of wastewater is realized, so that zero liquid discharge of the water island of a steel mill is realized in a circulating manner.
The reverse osmosis membrane technology has the advantages that:
the process is carried out at normal temperature and low pressure, the energy consumption is low, heating is not needed, the heat effect and phase state change are not needed, and the purposes of separation, concentration, purification, classification and the like can be achieved without adding any other substances, so the method is particularly suitable for concentrating and recovering extremely dilute solute;
desalting and purifying under constant volume and constant concentration, wide application range and strong universality;
the reverse osmosis device has simple structure, small occupied area, less required accessory equipment, convenient installation, low cost, easy insertion into the existing production process system, capacity enlargement and component increase, and does not need to worry about the technical difficulty caused by the capacity enlargement and the component increase;
the reverse osmosis device is convenient to operate, easy to maintain and repair, capable of being automatically operated and controlled, low in energy consumption of separation and concentration, and the operation cost is usually one fifth to one tenth of that of the traditional technology.
Arrows in the figure 1 represent flow directions, connecting lines represent a communication relation, and the design basic process concept is that steel mill passivation wastewater (TDS 2000) enters a multi-stage membrane system for concentration and separation after pretreatment, finally, the conductivity of fresh water effluent is less than or equal to 10us/mc, COD is less than or equal to 5mg/L and serves as process water, the concentration multiple of concentrated water can reach more than 40 times, the TDS concentration is improved to more than 60000, namely, 30t/h of fresh water is directly recycled into the process after membrane treatment, the residual 0.75t/h of fresh water with the concentration of 6% is further concentrated and crystallized into crystals through an MVR evaporative crystallization system and is discharged as solid waste, and condensed water generated in the evaporative crystallization process returns to the membrane system, so that the environmental protection requirement of zero emission is met, the process treatment process is intelligently and fully automatically controlled, the control precision is high, and the operation and use are very convenient;
the MVR evaporation system is a novel high-efficiency energy-saving evaporation device, adopts vacuum low-temperature and low-pressure steaming technology and electric energy, compresses the generated steam by an MVR steam compressor to heat, evaporate and separate an evaporator, is the most advanced evaporation technology in the world at present, is an upgrading and updating product of the traditional evaporation device, in the conventional multiple-effect evaporation process, the secondary steam of a certain effect of the evaporator can not be directly used as a heat source of the effect but can only be used as a heat source of the second effect or a plurality of effects, if the energy of the secondary steam is required to be additionally supplied as the heat source of the effect, the temperature (pressure) of the secondary steam is improved, a steam jet pump can only compress part of the secondary steam, the MVR evaporator can compress all the secondary steam in the evaporator, the secondary steam is compressed by the compressor, the pressure and the temperature are increased, the enthalpy is increased along with the compression, and the secondary steam is sent to a heating chamber of the evaporator to be used as heating steam, namely generating steam, the feed liquid is maintained in an evaporation state, and the heating steam transfers heat to the material to be condensed into water, so that the steam to be discarded originally is fully utilized, latent heat is recovered, and the heat efficiency is improved.
Drawings
Fig. 1 is a schematic structural view of a passivation wastewater film concentration integrated system in a steel mill according to the present invention.
In the figure: 1 coagulating tank, 2 dosing tanks, 3 dosing pumps, 4 raw water pumps, 5 pipeline mixers, 6 liquid pumps, 7 first circulating tanks, 8 second circulating tanks, 9 tubular ultrafiltration systems, 10 water storage tanks, 11 reverse osmosis membrane modules, 12 first-stage membrane concentrated water tanks, 13 first pumps, 14 second pumps, 15 MVR evaporative crystallization systems, 16 first-stage membrane fresh water tanks and 17 second-stage membrane fresh water tanks.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.
Example one
Referring to fig. 1, a steel mill passivation wastewater membrane concentration integrated system comprises a coagulation tank 1, wherein the interior of the coagulation tank 1 is hermetically communicated with a pipeline mixer 5, the interior of the pipeline mixer 5 is hermetically communicated with a dosing system, the dosing system comprises a dosing tank 2 and a dosing pump 3, the input end of the dosing pump 3 is hermetically communicated with the interior of the dosing tank 2, the output end of the dosing pump 3 is hermetically communicated with the interior of the pipeline mixer 5, a raw water pump 4 is arranged below the pipeline mixer 5, the output end of the raw water pump 4 is hermetically communicated with the interior of the pipeline mixer 5, a liquid pump 6 is arranged on the right side of the coagulation tank 1, the input end of the liquid pump 6 is hermetically communicated with the interior of the coagulation tank 1, the output end of the liquid pump 6 is hermetically communicated with a first circulating pump 7 and a second circulating pump 8, a tubular ultrafiltration system 9 is arranged on the right side of the second circulating pump 8, the first circulating pump 7 and the second circulating pump 8 are both hermetically communicated with the tubular system 9, tubular ultrafiltration system 9 is last sealed intercommunication has water storage tank 10, water storage tank 10 is last sealed intercommunication has reverse osmosis membrane subassembly 11, reverse osmosis membrane subassembly 11 is last sealed intercommunication has one-level membrane dense water jar 12, the right side of one-level membrane dense water jar 12 is equipped with MVR evaporation crystal system 15, MVR evaporation crystal system 15's inside and one-level membrane dense water jar 12's inside seal are linked together, MVR evaporation crystal system 15's right side is provided with No. one membrane freshwater tank 16 and No. two membrane freshwater tanks 17, the inside of No. one membrane freshwater tank 16 is linked together with reverse osmosis membrane subassembly 11's inside seal, and No. two membrane freshwater tank 17's inside and reverse osmosis membrane subassembly 11's inside seal are linked together.
Example two
The following further improvements are made on the basis of the first embodiment:
in the invention, the inside of a first-stage membrane concentrated water tank 12 is communicated with the inside of a reverse osmosis membrane component 11 in a sealing manner, a communicating component is arranged between the first-stage membrane concentrated water tank 12 and an MVR evaporative crystallization system 15, the communicating component comprises a first pump 13, the input end of the first pump 13 is communicated with the inside of the first-stage membrane concentrated water tank 12 in a sealing manner, the output end of the first pump 13 is communicated with the inside of the MVR evaporative crystallization system 15 in a sealing manner, a second pump 14 is arranged on the right side of the first pump 13, the input end of the second pump 14 is communicated with the inside of the MVR evaporative crystallization system 15 in a sealing manner, and the output end of the second pump 14 is communicated with the inside of a water storage tank 10 in a sealing manner.
In the invention, arrows in figure 1 represent flow directions, connecting lines represent communication relations, and the design basic process concept is that steel mill passivation wastewater (TDS 2000) enters a multi-stage membrane system for concentration and separation after pretreatment, finally, the conductivity of fresh water effluent is less than or equal to 10us/mc, COD (chemical oxygen demand) is less than or equal to 5mg/L and serves as process water, the concentration multiple of concentrated water can reach more than 40 times, the TDS concentration is improved to more than 60000, namely, 30t/h of fresh water subjected to membrane treatment is 29.8t/h and directly recycled into the process, the residual 0.75t/h of fresh water with the concentration of 6 percent is further concentrated and crystallized into crystals through an MVR evaporative crystallization system and is discharged as solid waste, and condensed water generated in the evaporative crystallization process returns into the membrane system, so that the environmental protection requirement of zero discharge is met, the process treatment process is intelligently and fully automatically controlled, the control precision is high, and the operation and the use are very convenient.
In the description of the present application, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, a connection through an intermediate medium, and a connection between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to specific circumstances.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. The utility model provides a steel mill passivation waste water membrane concentration integrated system, includes thoughtlessly congeal jar (1), its characterized in that, the sealed intercommunication in inside of thoughtlessly congealing jar (1) has pipeline mixer (5), and the sealed intercommunication in inside of pipeline mixer (5) has medicine system, the right side of thoughtlessly congealing jar (1) is equipped with drawing liquid pump (6), and the input of drawing liquid pump (6) and the sealed intercommunication in inside of thoughtlessly congealing jar (1), the sealed intercommunication of output of drawing liquid pump (6) has circulating pump (7) and No. two circulating pump (8), the right side of No. two circulating pump (8) is equipped with tubular ultrafiltration system (9), circulating pump (7) and No. two circulating pump (8) all are linked together with tubular ultrafiltration system (9) are sealed, sealed intercommunication has water storage tank (10) on tubular ultrafiltration system (9), sealed intercommunication has reverse osmosis membrane subassembly (11) on water storage tank (10), the reverse osmosis membrane module (11) is provided with a first-level membrane concentrated water tank (12) in a sealing and communicating manner, the right side of the first-level membrane concentrated water tank (12) is provided with an MVR evaporation crystallization system (15), and the interior of the MVR evaporation crystallization system (15) is communicated with the interior of the first-level membrane concentrated water tank (12) in a sealing manner.
2. The steel mill passivation wastewater membrane concentration integrated system according to claim 1, wherein the dosing system comprises a dosing tank (2) and a dosing pump (3), an input end of the dosing pump (3) is communicated with an inner seal of the dosing tank (2), an output end of the dosing pump (3) is communicated with an inner seal of a pipeline mixer (5), a raw water pump (4) is arranged below the pipeline mixer (5), and an output end of the raw water pump (4) is communicated with an inner seal of the pipeline mixer (5).
3. The integrated membrane concentration system for passivation wastewater of steel mill according to claim 1, characterized in that the inside of the primary membrane concentrated water tank (12) is hermetically communicated with the inside of the reverse osmosis membrane module (11), and a communication module is arranged between the primary membrane concentrated water tank (12) and the MVR evaporative crystallization system (15).
4. The steel mill passivation wastewater film concentration integrated system according to claim 3, characterized in that the communication component comprises a first pump (13), an input end of the first pump (13) is communicated with an inner seal of the primary film concentrated water tank (12), an output end of the first pump (13) is communicated with an inner seal of the MVR evaporative crystallization system (15), a second pump (14) is arranged on the right side of the first pump (13), an input end of the second pump (14) is communicated with an inner seal of the MVR evaporative crystallization system (15), and an output end of the second pump (14) is communicated with an inner seal of the water storage tank (10).
5. The integrated membrane concentration system for passivation wastewater of steel mill according to claim 1, characterized in that a membrane fresh water tank (16) and a membrane fresh water tank (17) are arranged on the right side of the MVR evaporative crystallization system (15), the inside of the membrane fresh water tank (16) is communicated with the inside of the reverse osmosis membrane assembly (11) in a sealed manner, and the inside of the membrane fresh water tank (17) is communicated with the inside of the reverse osmosis membrane assembly (11) in a sealed manner.
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| CN202111144527.8A CN114031231A (en) | 2021-09-28 | 2021-09-28 | Steel mill passive waste water membrane concentration integrated system |
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2021
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| CN113149135A (en) * | 2021-04-16 | 2021-07-23 | 国能朗新明环保科技有限公司南京分公司 | System and method for recycling strong brine through ultrafiltration and reverse osmosis |
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