CN113548754A - Double-membrane treatment system for circulating cooling water treatment - Google Patents
Double-membrane treatment system for circulating cooling water treatment Download PDFInfo
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- CN113548754A CN113548754A CN202110931725.2A CN202110931725A CN113548754A CN 113548754 A CN113548754 A CN 113548754A CN 202110931725 A CN202110931725 A CN 202110931725A CN 113548754 A CN113548754 A CN 113548754A
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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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- 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
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- 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
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- 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
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- 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
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- 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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- 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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- 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
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/023—Water in cooling circuits
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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
- C02F2209/04—Oxidation reduction potential [ORP]
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/043—Treatment of partial or bypass streams
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- 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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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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
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
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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
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
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Abstract
The invention discloses a double-membrane treatment system for circulating cooling water treatment, which comprises an integrated equipment box body A, an integrated equipment box body B, and a raw water pool and a sludge pool which are positioned outside, wherein a softening tank I, a softening tank II, a softening membrane backwashing water pool, a concentration tank, a bactericide dosing unit, a PFM softening membrane, a circulating pump, an acid-base cleaning system and a flushing water pump are arranged in the integrated equipment box body A; the integrated equipment box body B comprises a caustic soda dosing unit, an online PH detector, a concentrated water tank, a concentrated water pump, a reverse osmosis cleaning water tank, an ORP/conductivity online monitoring instrument, a cartridge filter, a booster pump, a high-pressure pump, a reducing agent, a scale inhibitor dosing system, an RO membrane, an intersegmental booster pump, an effluent detection instrument, a concentrated water quick-discharge valve and a softened water tank; the outside of the integrated equipment box body B is provided with a ladder stand. Compared with the prior art, the invention has the advantages that: the process has wide applicability and zero waste water discharge, can greatly prolong the service life of the reverse osmosis membrane, saves water resources and reduces the risk of environmental pollution.
Description
Technical Field
The invention relates to the technical field of water treatment systems, in particular to a double-membrane treatment system for circulating cooling water treatment.
Background
At present, the treatment of circulating cooling water mostly uses a 'filtration + reverse osmosis' treatment process. The water with better water quality can be stably operated. If the water quality is relatively turbid and the raw water has high hardness, the process can easily cause the blockage and the scaling of the membrane.
After blockage and scaling, reverse osmosis is required to be cleaned, frequent cleaning also can cause the desalination rate of the reverse osmosis membrane to be reduced, and if backwashing is not thorough, the yield of the reverse osmosis membrane can be greatly reduced. Frequent cleaning also results in a reduction in the life of the reverse osmosis membrane.
In addition, "filtration + reverse osmosis" can produce about 25% waste water when handling recirculated cooling water, and this part of high salt waste water just generally is just discharged as the waste water, causes the waste of water resource, also can produce the environmental protection pollution problem.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the technical defects, provide a double-membrane treatment system for circulating cooling water treatment, have wide applicability and zero wastewater discharge process, greatly prolong the service life of a reverse osmosis membrane, save water resources and reduce the risk of environmental pollution.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a double-membrane treatment system for circulating cooling water treatment comprises an integrated equipment box body A, an integrated equipment box body B, and a raw water pool and a sludge pool which are positioned outside, wherein a softening tank I, a softening tank II, a softening membrane backwashing water pool, a concentration tank, a bactericide dosing unit, a soda dosing unit, a PFM softening membrane, a circulating pump, an acid-base cleaning system and a flushing water pump are arranged in the integrated equipment box body A;
the integrated equipment box body B comprises a caustic soda dosing unit, a PH adjusting device, a softened water reaction stirrer, an online PH detector, a concentrated water tank, a concentrated water pump, a reverse osmosis cleaning water tank, an ORP/conductivity online monitoring instrument, a security filter, a booster pump, a high-pressure pump, a reducing agent, a scale inhibitor dosing system, an RO membrane, an intersegmental booster pump, a water outlet detection instrument, a concentrated water quick discharge valve and a softened water tank;
a crawling ladder is arranged outside the integrated equipment box body B, integrated equipment box body doors are arranged on the integrated equipment box body A and the integrated equipment box body B, and control cabinets are arranged in the integrated equipment box body A and the integrated equipment box body B;
a raw water pump connected with the softening tank I is arranged in the raw water pool, the bactericide dosing unit is arranged on a pipeline connected with the raw water pump and the softening tank I, the softening tank I and the softening tank II are connected with the concentration tank, the softening tank II is provided with a caustic soda dosing unit and a soda dosing unit, the concentration tank is provided with an automatic mud valve connected with the sludge tank, the water outlet end of the concentration tank is connected with the circulating pump, the water outlet end of the circulating pump is connected with the PFM softening membrane, a softening membrane water inlet detection instrument is arranged on the pipeline before entering the PFM softening membrane, a circulating pump inlet electric valve and a sewage reflux valve are arranged on the PFM softening membrane pipeline, a water production electric valve connected with the softening water tank is arranged at the water outlet end of the PFM softening membrane, the PH adjusting device adds medicine before entering the softening water tank, the softening water tank is provided with a softening water reaction stirrer, an online PH detector and a flushing water pump, and the PFM softening membrane is provided with an acid-base cleaning system and a softening membrane backwashing water tank;
the utility model discloses a sewage treatment system, including softened water tank, safety filter, RO membrane, sludge impoundment tank, water outlet end of softened water tank passes through the booster pump and is connected with safety filter to be equipped with ORP/conductivity on-line monitoring appearance and reductant, antisludging agent charge system on the pipeline, softened water tank is equipped with softened water surpasses the pump, and safety filter water outlet end passes through the high-pressure pump and connects the RO membrane, RO membrane water outlet end is equipped with out water detecting instrument, the RO membrane is equipped with reverse osmosis and washs the water tank, the dense water outlet end of RO membrane is equipped with the dense water back flow, be equipped with dense water reflux flowmeter on the dense water back flow, and the dense water that the RO membrane came out is partly through the dense water back flow and gets back to the sludge impoundment tank, and partly dense water gets into the dense water tank, through dense water pump output.
As an improvement, the RO membrane is provided with two sections, and the first section of RO membrane is connected with the second section of RO membrane through an intersegmental booster pump.
As an improvement, a concentrated water quick discharge valve is arranged on the concentrated water return pipe.
As an improvement, 2 integrated equipment box doors are arranged on the integrated equipment box A and the integrated equipment box B.
Compared with the prior art, the invention has the advantages that: as the pretreatment of ultrafiltration level, the effluent turbidity is very stable, the effluent turbidity is guaranteed to reach the standard stably, and the pollution of the high SDI value pretreated effluent to reverse osmosis to a subsequent reverse osmosis system is avoided. The system is not greatly influenced by the fluctuation of water quality and the frequency of backwashing like the pretreatment of the filter, so that the system is more stable.
Meanwhile, the ultrafiltration softening process has high removal efficiency on calcium and magnesium ions in raw water, and avoids scaling of a subsequent reverse osmosis membrane.
The concentrated water generated by reverse osmosis can also return to the front end of the ultrafiltration softening membrane, thereby greatly improving the water recovery rate of the system and reducing the waste water rate of the system. The system has better stability and good applicability to the treatment of raw water with high hardness and high turbidity.
The process has wide applicability and zero waste water discharge, can greatly prolong the service life of the reverse osmosis membrane, saves water resources and reduces the risk of environmental pollution.
Drawings
FIG. 1 is a schematic flow diagram of a dual membrane treatment system for recirculating cooling water treatment in accordance with the present invention.
FIG. 2 is a top view of a dual membrane treatment system for recirculating cooling water treatment in accordance with the present invention.
As shown in the figure: 1-a bactericide dosing unit; 2-caustic soda dosing unit; 3-adding a chemical agent into the sodium carbonate; 4-softening tank I; 5-softening the second tank; 6-a concentration tank; 7-a circulating pump; 8-acid-base cleaning system; 9-electric valve at the inlet of the circulating pump; 10-softened film water inlet detection instrument; 11-PFM softening membrane; 12-a PH adjusting device; 13-water production electric valve; 14-online PH detector; 15-softening the water tank; 16-a water flushing pump; 17-a booster pump; 18-ORP/conductivity on-line monitoring instrument; 19-a cartridge filter; 20-a high pressure pump; 21-reducing agent, antisludging agent dosing system; 22-RO membrane; 23-section booster pump; 24-a water outlet detection instrument; 25-concentrated water quick discharge valve; 26-a reverse osmosis cleaning water tank; 27-a dense water tank; 28-a concentrate pump; 29-concentrated water return pipe; 30-concentrated water reflux flow meter; 31-automatic mud valve; 32-a sludge tank; 33-raw water pool; 34-a raw water pump; 35 a sewage return valve; 36-demineralized water agitator; 37-softened water overtaking pump; 38-integrated equipment cabinet a; 39-integrated equipment box B; 40-an integrated equipment box door; 41-climbing ladder; 42-a control cabinet; 43-softening membrane backwashing water pool.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
A double-membrane treatment system for circulating cooling water treatment comprises an integrated equipment box body A38, an integrated equipment box body B39, and a raw water tank 33 and a sludge tank 32 which are positioned outside, wherein a softening tank I4, a softening tank II 5, a softening membrane backwashing water tank 43, a concentration tank 6, a bactericide dosing unit 1, a soda dosing unit 3, a PFM softening membrane 11, a circulating pump 7, an acid-base cleaning system 8 and a flushing water pump 16 are arranged in the integrated equipment box body A38;
the integrated equipment box B39 comprises a caustic soda dosing unit 2, a PH adjusting device 12, a softened water reaction stirrer 36, an online PH detector 14, a concentrated water tank 27, a concentrated water pump (28), a reverse osmosis cleaning water tank 26, an ORP/conductivity online monitoring instrument 18, a cartridge filter 19, a booster pump 17, a high-pressure pump 20, a reducing agent, a scale inhibitor dosing system 21, an RO membrane 22, an intersegmental booster pump 23, an effluent detection instrument 24, a concentrated water quick-discharge valve 25 and a softened water tank 15;
a ladder 41 is arranged outside the integrated equipment box body B39, integrated equipment box body doors 40 are arranged on the integrated equipment box body A38 and the integrated equipment box body B39, and a control cabinet 42 is arranged in the integrated equipment box body A38 and the integrated equipment box body B39;
the raw water tank 33 is internally provided with a raw water pump 34 connected with a softening tank I4, the bactericide dosing unit 1 is arranged on a pipeline connecting the raw water pump 34 with the softening tank I4, a softening tank II 5 and a concentration tank 6 are connected, the softening tank II 5 is provided with a caustic soda dosing unit 2 and a soda dosing unit 3, the concentration tank 6 is provided with an automatic sludge discharge valve 31 connected with a sludge tank 32, the water outlet end of the concentration tank 6 is connected with a circulating pump 7, the water outlet end of the circulating pump 7 is connected with a PFM softening film 11, a softening film water inlet detection instrument 10 is arranged on the pipeline before entering the PFM softening film 11, the pipeline of the PFM softening film 11 is provided with a circulating pump inlet electric valve 9 and a return sewage valve 35, the water outlet end of the PFM softening film 11 is provided with a water production electric valve 13 connected with a softening water tank 15, the water is dosed by a PH adjusting device 12 before entering the softening water tank 15, the softening water tank 15 is provided with a softened water reaction stirrer 36, The on-line PH detector 14 and the washing water pump 16, the PFM softened membrane 11 is provided with an acid-base cleaning system 8 and a softened membrane backwashing water tank 43;
the water outlet end of the softened water tank 15 is connected with a security filter 19 through a booster pump 17, an ORP/conductivity online monitoring instrument 18 and a reducing agent and scale inhibitor adding system 21 are arranged on a pipeline, the softened water tank 15 is provided with a softened water surpassing pump 37, the water outlet end of the security filter 19 is connected with an RO membrane 22 through a high-pressure pump 20, a water outlet detection instrument 24 is arranged at the water outlet end of the RO membrane 22, the RO membrane 22 is provided with a reverse osmosis cleaning water tank 26, a concentrated water return pipe 29 is arranged at the concentrated water outlet end of the RO membrane 22, a concentrated water return flow meter 30 is arranged on the concentrated water return pipe 29, part of concentrated water coming out of the RO membrane 22 returns to a sludge pool 32 through the concentrated water return pipe 29, and part of concentrated water enters the concentrated water tank 27 and is output through the concentrated water pump 28.
The RO membrane 22 is provided with two sections, and the first section of RO membrane is connected with the second section of RO membrane through an intersegmental booster pump 23.
The concentrated water return pipe 29 is provided with a concentrated water quick discharge valve 25.
And 2 integrated equipment box doors 40 are arranged on the integrated equipment box A38 and the integrated equipment box B39.
When the invention is implemented specifically, a raw water tank 33 is built on site, circulating cooling water generated by waste heat is collected into the raw water tank through a pipeline, sewage is sent into a softening tank I4 through a raw water lifting pump 34, a medicament of a bactericide dosing unit 1 is added into the pipeline before entering the softening tank I4, a subsequent system is sterilized and disinfected, the disinfected sewage automatically flows into a softening tank II 5, the soda dosing unit 2 and a soda dosing unit 3 are used for dosing and softening in the softening tank II 5, the softened water automatically flows into a concentration tank 6, the concentration tank 6 is provided with an automatic sludge discharge valve 31, the sludge is automatically discharged into a sludge tank 32, the water discharged from the concentration tank 6 is sent into a PFM softening membrane 11 through a circulating pump 7, a softening membrane water inlet detection instrument 10 is arranged on the pipeline before entering the softening membrane, the hardness, pressure and flow of the inlet water are mainly monitored, and the stable operation of the system is ensured. The softening membrane pipeline is provided with a circulating pump inlet electric valve 9 and a sewage reflux valve 35, the softening membrane is sent into a softening water tank 15 through a water production electric valve 13, and the chemicals are added by a PH adjusting device 12 before entering the softening water tank 15, so that the PH of reverse osmosis inlet water is between 6 and 7.5, the PH value is monitored by an online PH detector 14 in real time, the chemical adding amount is dynamically adjusted, and the scaling of a reverse osmosis membrane due to overhigh PH is avoided. The softened water tank 15 is provided with a softened water stirrer 36, the softened membrane is provided with an acid-base cleaning system 8, the membrane surface is cleaned when the membrane is polluted, and the stability of water yield is favorably maintained.
The outlet water of the softened water tank 15 is sent to a cartridge filter 19 by a booster pump 17, and an ORP/conductivity on-line monitoring instrument 18 is arranged on a pipeline and is responsible for monitoring the pH value and the conductivity of the sewage entering the reverse osmosis. The softened water tank 15 is also provided with a softened water overtaking pump 37, so that the hardness of the system can be conveniently removed when the RO system is maintained, and part of softened water can be mixed into the RO outlet water, thereby ensuring that the water quality is qualified and simultaneously reducing the operation load of the RO system. And (3) starting a reducing agent and scale inhibitor dosing system 21 when the RO operates, and oxidizing a protective film to avoid scaling of the reverse osmosis membrane. The effluent of the cartridge filter 19 enters a high-pressure pump 20 and is sent into an RO membrane 22 by the high-pressure pump, the concentrated water of one section of the RO membrane enters a second section of the RO membrane through an intersegment booster pump 23, the effluent of the two sections of the RO membranes has low salt content and directly enters a circulating water tank as circulating make-up water after being monitored by an effluent detection instrument 24. The system is equipped with a reverse osmosis wash tank 26 which automatically flushes with product water when it is detected that the inlet membrane pressure has increased by more than 10% -20% per unit time.
Most of the concentrated water of the two sections of RO membranes returns to a sludge tank 32 through a concentrated water return pipe 29, the supernatant of the sludge tank 32 returns to a raw water tank 33, and a small amount of concentrated water enters a concentrated water tank 27 and is sent to a raw material yard through a concentrated water pump 28 to be used as water for spraying and dedusting.
A concentrated water reflux flowmeter 30 is arranged on the reflux pipe 29 to adjust the reflux flow, and the concentrated water is refluxed to a sludge pool 32.
Each dosing unit is provided with a dosing pump and a flowmeter, caustic soda and a bactericide are added into the No. 1 softening tank, soda is added into the No. 2 softening tank, and most bivalent ions easy to scale are removed. Softened water automatically flows into a homogenizing and concentrating tank, a liquid level meter is arranged in the reaction tank, a water outlet of the reaction tank is connected with a circulating pump, and the circulating pump provides operation power and pressure for the softened membrane to filter the softened water from the membrane, so that filtered water is produced.
In the high-speed operation process of the circulating pump, the circulating water in the softening membrane is given a higher flow velocity which is controlled to be 1-2m/s, the flow velocity is more economical, on one hand, the permeation surface of the membrane can be washed, on the other hand, the energy consumption is also reduced, and the purpose of energy conservation is realized.
The softened film produced water enters a softened water production tank. The pH adjusting and dosing unit is used for adding acid into the softened water production tank to adjust the pH value of water quality, so that the pH value of the softened water production tank is about 7, and the phenomenon that the pH value of reverse osmosis membrane water is too high in the production process and scales in the reverse osmosis membrane due to the too high pH value is avoided.
The bottom of the softening water production tank is connected with a booster pump, the booster pump sends water to a high-pressure pump, the outlet of the high-pressure pump is connected with a reverse osmosis membrane, and the reverse osmosis membrane operates in a variable frequency mode in the operation process. The reverse osmosis produced water is reused for production, and concentrated water enters a No. 1 softening tank at the front end of the system for recovery treatment, so that the wastewater rate of the whole system can be controlled to be more than 95%. The system only produces water and wastewater in the regular sewage discharge of the adjusting concentration tank, the wastewater enters a sludge tank, and supernatant of the sludge tank enters a softening tank for retreatment and recovery. The part of waste water lost by sludge discharge accounts for less than 5% of the water quantity of the system. The 5% waste water can be used for storage yard spraying and vertical mill spraying water replenishing, and the zero discharge of the sewage is really realized.
The invention has the characteristics that:
1: compared with the traditional reverse osmosis wastewater rate which is generally more than 20%, the wastewater rate of the system can be controlled to be 5%. The lower wastewater rate is convenient for the wastewater to be completely recycled, and the zero discharge of the wastewater is really realized. The pollution of the discharged wastewater to the environment is reduced.
2: the traditional processes of dosing softening, flocculation precipitation, clarification, two-stage pressure filtration, ultrafiltration and reverse osmosis have the problems of long process, more structures and unstable effect.
3: in the traditional softening process, in order to accelerate precipitation, a flocculating agent is added, excessive flocculating agent is easy to block membrane pores of the ultrafiltration membrane, so that the membrane is frequently cleaned, and the service life of the membrane is shortened by frequent cleaning.
4: because of the softening membrane process, the hardness of water entering the softening membrane is low, and the reverse osmosis membrane is not easy to scale. The low turbidity of the outlet water of the ultrafiltration membrane also avoids the risk of reverse osmosis blockage by sludge.
5: the system is provided with a backwashing system, and the polluted side of the membrane is cleaned by backwashing regularly, so that the pollution degree of the ultrafiltration membrane is reduced. The design can reduce the circulating flow rate of circulating water in the softening film, thereby not only achieving the purpose of protecting the film, but also realizing the purpose of saving energy.
6: the system can treat circulating cooling water with higher hardness and high PH value because of the front end softening ultrafiltration membrane (PFM softening membrane). The application range is wide.
7: the softening membrane backwashing pump of the system is subjected to variable frequency regulation, and can control backwashing pressure difference by monitoring backwashing pressure and operating pressure, so that membrane damage caused by overlarge membrane pressure difference is avoided;
the automatic flushing can be realized when the machine is stopped every time, and the sludge deposition in the softened membrane is avoided, so that the blockage of the tubular membrane caused by the accumulation of suspended matters in the membrane is avoided.
8: during backwashing, sodium hypochlorite or acid can be added into backwashing water, then soaking is carried out, and online cleaning of sterilization and descaling is carried out regularly, so that the PFM softening membrane is kept to operate in a normal state all the time, the surface of the membrane is kept clean, frequent cleaning of the membrane is reduced, and damage to the membrane is avoided.
9: the invention can integrate all the equipment in the container as integrated sewage treatment equipment. Has the characteristics of small occupied area and convenient operation and management.
10: different sizes can be customized according to the water quantity, the movable sewage treatment device is easy to move and can be used for different sewage treatment points. Maximizing utilization.
11. This engineering uses sled dress mounting means, and installation time is short simple to operate, and construction cycle is short. The problems of environmental pollution and resource waste caused by long-term construction are avoided. The start-up debugging only needs 10 days from the beginning of installation to the water outlet.
12. Because the process route of the system is determined, the system can be produced in a standardized way, and programs can be input into equipment in advance when leaving a factory, so that the manpower and time for designing and debugging the programs from the beginning are saved.
13. The system has high automation degree. The operation management is convenient.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. A dual membrane treatment system for recirculated cooling water treatment, characterized by: the integrated equipment comprises an integrated equipment box body A (38), an integrated equipment box body B (39), and a raw water pool (33) and a sludge pool (32) which are positioned outside, wherein a softening tank I (4), a softening tank II (5), a softened membrane backwashing water pool (43), a concentration tank (6), a bactericide dosing unit (1), a soda dosing unit (3), a PFM softened membrane (11), a circulating pump (7), an acid-base cleaning system (8) and a washing water pump (16) are arranged in the integrated equipment box body A (38);
the integrated equipment box body B (39) comprises a caustic soda dosing unit (2), a PH adjusting device (12), a softened water reaction stirrer (36), an online PH detector (14), a concentrated water tank (27), a concentrated water pump (28), a reverse osmosis cleaning water tank (26), an ORP/conductivity online monitoring instrument (18), a cartridge filter (19), a booster pump (17), a high-pressure pump (20), a reducing agent, a scale inhibitor dosing system (21), an RO membrane (22), an intersegmental booster pump (23), an effluent detecting instrument (24), a concentrated water quick-discharge valve (25) and a softened water tank (15);
a ladder (41) is arranged outside the integrated equipment box body B (39), integrated equipment box body doors (40) are arranged on the integrated equipment box body A (38) and the integrated equipment box body B (39), and control cabinets (42) are arranged in the integrated equipment box body A (38) and the integrated equipment box body B (39);
the raw water tank (33) is internally provided with a raw water pump (34) connected with a softening tank I (4), a bactericide dosing unit (1) is arranged on a pipeline connected with the raw water pump (34) and the softening tank I (4), a softening tank II (5) and a concentration tank (6) are connected, the softening tank II (5) is provided with a caustic soda dosing unit (2) and a soda dosing unit (3), the concentration tank (6) is provided with an automatic mud valve (31) connected with a sludge tank (32), the water outlet end of the concentration tank (6) is connected with a circulating pump (7), the water outlet end of the circulating pump (7) is connected with a PFM softening membrane (11), a softening membrane water inlet detection instrument (10) is arranged on the pipeline before entering the PFM softening membrane (11), and a circulating pump inlet electric valve (9) and a sewage reflux valve (35) are arranged on the pipeline of the PFM softening membrane (11), a water production electric valve (13) connected with a softened water tank (15) is arranged at the water outlet end of the PFM softened membrane (11), chemicals are added by a PH adjusting device (12) before entering the softened water tank (15), the softened water tank (15) is provided with a softened water reaction stirrer (36), an online PH detector (14) and a flushing water pump (16), and the PFM softened membrane (11) is provided with an acid-base cleaning system (8) and a softened membrane backwashing water tank (43);
the water outlet end of the softened water tank (15) is connected with a cartridge filter (19) through a booster pump (17), an ORP/conductivity online monitoring instrument (18) and a reducing agent and scale inhibitor adding system (21) are arranged on the pipeline, a softened water tank (15) is provided with a softened water bypass pump (37), the water outlet end of a cartridge filter (19) is connected with an RO membrane (22) through a high-pressure pump (20), the water outlet end of the RO membrane (22) is provided with a water outlet detection instrument (24), the RO membrane (22) is provided with a reverse osmosis cleaning water tank (26), a concentrated water outlet end of the RO membrane (22) is provided with a concentrated water return pipe (29), a concentrated water reflux flowmeter (30) is arranged on the concentrated water reflux pipe (29), part of concentrated water coming out of the RO membrane (22) returns to the sludge pool (32) through the concentrated water reflux pipe (29), and part of concentrated water enters the concentrated water tank (27) and is output through the concentrated water pump (28).
2. The dual membrane treatment system for recirculated cooling water treatment of claim 1, wherein: the RO membrane (22) is provided with two sections, and the first section of RO membrane is connected with the second section of RO membrane through an intersegmental booster pump (23).
3. The dual membrane treatment system for recirculated cooling water treatment of claim 1, wherein: the concentrated water return pipe (29) is provided with a concentrated water quick discharge valve (25).
4. The dual membrane treatment system for recirculated cooling water treatment of claim 1, wherein: and 2 integrated equipment box doors (40) are arranged on the integrated equipment box A (38) and the integrated equipment box B (39).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110931725.2A CN113548754A (en) | 2021-08-13 | 2021-08-13 | Double-membrane treatment system for circulating cooling water treatment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110931725.2A CN113548754A (en) | 2021-08-13 | 2021-08-13 | Double-membrane treatment system for circulating cooling water treatment |
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| CN113548754A true CN113548754A (en) | 2021-10-26 |
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