CN113955828A - Gradient utilization device for reverse osmosis concentrated water - Google Patents
Gradient utilization device for reverse osmosis concentrated water Download PDFInfo
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- CN113955828A CN113955828A CN202111342001.0A CN202111342001A CN113955828A CN 113955828 A CN113955828 A CN 113955828A CN 202111342001 A CN202111342001 A CN 202111342001A CN 113955828 A CN113955828 A CN 113955828A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 367
- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 270
- 238000000034 method Methods 0.000 claims abstract description 48
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 43
- 230000023556 desulfurization Effects 0.000 claims abstract description 43
- 238000010612 desalination reaction Methods 0.000 claims abstract description 5
- 230000001502 supplementing effect Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 9
- 238000005260 corrosion Methods 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 claims description 4
- 239000011152 fibreglass Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 239000004567 concrete Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000012141 concentrate Substances 0.000 claims 5
- 230000003020 moisturizing effect Effects 0.000 claims 2
- 238000004064 recycling Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 6
- 239000002351 wastewater Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000008235 industrial water Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001039 duplex stainless steel Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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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
- C02F1/44—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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- 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
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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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)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a gradient utilization device of reverse osmosis concentrated water, which comprises: the system comprises a reverse osmosis concentrated water tank, a reverse osmosis concentrated water pump, a concentrated water reverse osmosis inlet lift pump, a concentrated water reverse osmosis inlet cartridge filter, a concentrated water reverse osmosis high-pressure pump, a concentrated water reverse osmosis device, a reverse osmosis concentrated water tank and a reverse osmosis concentrated water pump; wherein the concentrated water refers to the water produced by the water treatment desalination process and has higher concentration than the concentrated water; the inlet of the reverse osmosis concentrated water tank is connected with a concentrated water port of the existing reverse osmosis device, and the outlet of the reverse osmosis concentrated water tank is divided into two paths which are respectively connected with the inlet of a reverse osmosis concentrated water pump and the inlet of a concentrated water reverse osmosis water inlet lifting pump; the outlet of the reverse osmosis concentrated water pump is connected to the inlet of the desulfurization process water replenishing tank. The invention has the beneficial effects that: two paths of concentrated water recycling equipment are arranged and used for realizing total amount regulation and independent recycling of reverse osmosis concentrated water and reverse osmosis concentrated water according to different requirements of water replenishing of a desulfurization process, and the control is flexible and convenient.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to a gradient utilization device for reverse osmosis concentrated water.
Background
With the gradual maturity of the membrane industrial technology and the expansion of the demand of industrial water treatment, the reverse osmosis technology is rapidly developed as a water treatment desalination process, and is comprehensively popularized and applied in various desalination water systems. The reverse osmosis technology is based on the process principle, and a certain proportion of concentrated water is generated in the normal operation process. The conventional first-stage reverse osmosis system is designed to have a recovery rate of 75%, generates about 25% of concentrated water, generally has better water quality indexes except salt content, and is required to be utilized, treated and recycled in a gradient manner to the maximum extent so as to reduce the discharge amount of wastewater as much as possible.
At present, a wet desulphurization technology is generally adopted in domestic large-scale thermal power plants, and an absorption tower system in the wet desulphurization technology is used as a natural wastewater concentration system, so that the wet desulphurization technology has good adaptability to saline wastewater with certain concentration, can absorb proper amount of concentrated wastewater, and further controls the total wastewater treatment capacity of zero discharge, thereby providing an effective way for gradient utilization of reverse osmosis concentrated water.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a gradient utilization device for reverse osmosis concentrated water.
The reverse osmosis concentrated water gradient utilization device is also provided with a reverse osmosis concentrated water tank, a reverse osmosis concentrated water pump, a concentrated water reverse osmosis inlet water lift pump, a concentrated water reverse osmosis inlet water security filter, a concentrated water reverse osmosis high-pressure pump, a concentrated water reverse osmosis device, a reverse osmosis concentrated water tank and a reverse osmosis concentrated water pump on the basis of the conventional reverse osmosis device and a desulfurization process water replenishing tank; wherein the concentrated water refers to the water produced by the water treatment desalination process and has higher concentration than the concentrated water; the inlet of the reverse osmosis concentrated water tank is connected with a concentrated water port of the existing reverse osmosis device, and the outlet of the reverse osmosis concentrated water tank is divided into two paths which are respectively connected with the inlet of a reverse osmosis concentrated water pump and the inlet of a concentrated water reverse osmosis water inlet lifting pump; the concentrated water pump of reverse osmosis exports the water supply tank entry of being connected to desulfurization process, concentrated water reverse osmosis advances water lift pump and exports the connection reverse osmosis cartridge filter entry of intaking, the concentrated water reverse osmosis high-pressure pump entry of reverse osmosis cartridge filter exit linkage, concentrated water reverse osmosis high-pressure pump exit linkage concentrated water reverse osmosis equipment, the concentrated water export of concentrated water reverse osmosis equipment inserts the concentrated pond entry of reverse osmosis, the product water export access retrieval and utilization point of concentrated water reverse osmosis equipment, the concentrated pond exit linkage reverse osmosis concentrated water pump entry of reverse osmosis, the concentrated water pump exit linkage desulfurization process water supply tank entry of reverse osmosis.
Preferably, the reverse osmosis concentrated water tank and the reverse osmosis concentrated water tank are built together; the reverse osmosis concentrated water tank and the reverse osmosis concentrated water tank are both of underground steel concrete structures, and glass fiber reinforced plastics with an anti-corrosion effect are arranged on the inner walls of the reverse osmosis concentrated water tank and the reverse osmosis concentrated water tank.
Preferably, the reverse osmosis concentrated water pump, the concentrated water reverse osmosis inlet water lift pump, the concentrated water reverse osmosis high-pressure pump and the reverse osmosis concentrated water pump are all made of corrosion-resistant materials.
Preferably, the high-pressure pump of the reverse osmosis of the concentrated water adopts frequency conversion regulation, and the reverse osmosis equipment of the concentrated water adopts an anti-pollution membrane component.
Preferably, the reverse osmosis concentrated water gradient utilization device is connected to an auxiliary control PLC or DCS, and the reverse osmosis concentrated water pump, the concentrated water reverse osmosis water inlet lifting pump, the concentrated water reverse osmosis high-pressure pump and the reverse osmosis concentrated water pump are simultaneously and electrically connected with the PLC or DCS.
The working method of the reverse osmosis concentrated water gradient utilization device comprises the following steps:
s1, enabling concentrated water of the existing reverse osmosis device to enter a reverse osmosis concentrated water tank through a pipeline;
s2, the PLC or the DCS controls the start and stop of the reverse osmosis concentrated water pump, the concentrated water reverse osmosis water inlet lifting pump, the concentrated water reverse osmosis high-pressure pump and the reverse osmosis concentrated water pump in a linkage mode according to the high and low liquid level alarms of the reverse osmosis concentrated water tank and the reverse osmosis concentrated water tank;
s3, under normal working conditions, enabling all reverse osmosis concentrated water in the reverse osmosis concentrated water tank to enter a reverse osmosis water inlet lifting pump through a reverse osmosis concentrated water pump, and carrying out pressure lifting on the reverse osmosis concentrated water from the reverse osmosis concentrated water tank through the reverse osmosis water inlet lifting pump; the reverse osmosis concentrated water with the pressure increased enters the concentrated water reverse osmosis equipment through a concentrated water reverse osmosis water inlet security filter and a concentrated water reverse osmosis high-pressure pump; the concentrated water reverse osmosis equipment carries out re-concentration treatment on the reverse osmosis concentrated water to obtain concentrated water;
s4, when the amount of water to be supplemented in the desulfurization process changes: the output of a reverse osmosis concentrated water pump and a reverse osmosis concentrated water pump is adjusted, the re-concentration treatment output of a concentrated water reverse osmosis device is reduced to 0-50%, concentrated water flows into a reverse osmosis concentrated water tank, and concentrated water in the reverse osmosis concentrated water tank is used as water for a desulfurization process by the reverse osmosis concentrated water pump and is supplemented into a desulfurization process water supplementing tank; and the concentrated water is used for replenishing water in the absorption tower; or according to the water consumption of the desulfurization process of the wet desulfurization system, the concentrated water in the reverse osmosis concentrated water tank is used as the water for the desulfurization process, the concentrated water is supplemented to the desulfurization process water supplementing tank through the reverse osmosis concentrated water pump, and the reverse osmosis concentrated water collected by the desulfurization process water supplementing tank is used as the process water supplementing of the wet desulfurization system.
Preferably, the sum of the water output of the reverse osmosis concentrated water pump and the water output of the reverse osmosis concentrated water pump in the step S4 meets the requirement of the total water consumption of the wet desulphurization system.
The invention has the beneficial effects that:
the invention provides a reliable reverse osmosis concentrated water gradient utilization device aiming at the requirement of recycling reverse osmosis concentrated water, combines a wet desulphurization process, solves the inherent defects of the traditional reverse osmosis process in the aspect of concentrated water treatment, carries out re-concentration treatment on the reverse osmosis concentrated water, reduces the tail end concentrated water quantity, can recycle product water, improves the water utilization rate of the whole system, realizes the gradient utilization of the reverse osmosis concentrated water, and improves the water saving rate and the economical efficiency of the system; the part with insufficient desulfurization process water can utilize the existing industrial water source, and the operation of the existing system is not influenced;
the invention is provided with two paths of concentrated water recycling devices for realizing the total amount regulation and independent recycling of reverse osmosis concentrated water and reverse osmosis concentrated water according to different requirements of water replenishing of a desulfurization process, and the control is flexible and convenient.
Drawings
FIG. 1 is a schematic diagram of a reverse osmosis concentrated water gradient utilization device of the present invention.
Description of reference numerals: the system comprises a reverse osmosis concentrated water tank 1, a reverse osmosis concentrated water pump 2, a concentrated water reverse osmosis water inlet lifting pump 3, a desulfurization process water replenishing tank 4, a concentrated water reverse osmosis water inlet cartridge filter 5, a concentrated water reverse osmosis high-pressure pump 6, a concentrated water reverse osmosis device 7, a reverse osmosis concentrated water tank 8, a reverse osmosis concentrated water pump 9 and an existing reverse osmosis device 10.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for a person skilled in the art, several modifications can be made to the invention without departing from the principle of the invention, and these modifications and modifications also fall within the protection scope of the claims of the present invention.
Example one
The first embodiment of the application provides a reverse osmosis concentrated water gradient utilization device as shown in fig. 1, wherein the reverse osmosis concentrated water gradient utilization device is mainly used for a boiler make-up water treatment system and a desulfurization process water system of a certain power plant; the reverse osmosis concentrated water quantity of a certain power plant boiler make-up water treatment system and a desulfurization process water system is 3 multiplied by 50t/h, and after being collected and treated by the reverse osmosis concentrated water gradient utilization device, the reverse osmosis concentrated water can be completely recycled and reused. The reverse osmosis concentrated water gradient utilization device comprises:
1 reverse osmosis concentrated water tank 1, wherein the reverse osmosis concentrated water tank 1 adopts an underground reinforced concrete structure, is corrosion-resistant by glass fiber reinforced plastics and has a volume of 200m3；
2 reverse osmosis concentrated water pumps 2, 1 are used for preparing 1, the output is 150t/h, and S31603 materials are adopted;
2 concentrated water reverse osmosis water inlet lifting pumps 3, 1 is provided with 1, the output is 150t/h, and S31603 materials are adopted;
a desulfurization process water replenishing tank 4 (original equipment);
1 concentrated water reverse osmosis water inlet cartridge filter 5 with output of 150t/h and made of S31603 material;
2 concentrated water reverse osmosis high- pressure pumps 6, 1 is prepared with 1, the output is 150t/h, and S31603 materials are adopted;
1 set of concentrated water reverse osmosis equipment 7, selecting an anti-pollution membrane component, outputting power of 90t/h, designing inlet water TDS4000mg/L, recovering rate of 60% and concentrated water TDS10000 mg/L;
1 reverse osmosis concentrated water tank 8, which adopts an underground reinforced concrete structure, is made of glass reinforced plastic and is anticorrosive, and the volume of the tank is 100m3And is combined with a reverse osmosis concentrated water tank 1;
2 reverse osmosis concentrated water pumps 9, 1 for 1, with output of 60t/h and S2205 material; 3 sets of the existing reverse osmosis device 10, and the output of a single set is 150 t/h.
A concentrated water port of the existing reverse osmosis device 10 is connected into a reverse osmosis concentrated water tank 1, and an outlet of the reverse osmosis concentrated water tank 1 is respectively connected with an inlet of a reverse osmosis concentrated water pump 2 and an inlet of a concentrated water reverse osmosis water inlet lifting pump 3; the outlet of the reverse osmosis concentrated water pump 2 is connected to the inlet of the desulfurization process water replenishing tank 4; the outlet of the concentrated water reverse osmosis inlet lift pump 3 is sequentially connected with a concentrated water reverse osmosis inlet security filter 5 and a concentrated water reverse osmosis high-pressure pump 6, and is connected to the inlet of a newly-added concentrated water reverse osmosis device 7; a product water outlet of the concentrated water reverse osmosis equipment 7 is connected to a reuse point, and a concentrated water outlet is connected to an inlet of a reverse osmosis concentrated water tank 8; the outlet of the reverse osmosis concentrated water tank 8 is connected to a reverse osmosis concentrated water pump 9, and the outlet of the reverse osmosis concentrated water pump 9 is connected to the inlet of the desulfurization process water replenishing tank 4.
The equipment and the pipeline material of the reverse osmosis concentrated water gradient utilization device contacting the concentrated water are all made of stainless steel, duplex stainless steel or other anticorrosive materials, so that the corrosion of chloride ions and the like is effectively avoided, and the service life of the equipment is ensured.
The concentrated water reverse osmosis equipment 7 adopts an anti-pollution membrane element of Dow company, the recovery rate of the system is not more than 60%, the service life of the membrane element and the normal cleaning period are ensured, and the dosing and cleaning system can utilize the matching equipment of the existing reverse osmosis system and increase the corresponding dosing metering pump.
The reverse osmosis concentrated water gradient utilization device is connected to a water melting PLC or DCS, all power equipment is controlled through signals such as liquid level and flow, and one-key starting and stopping and automatic operation of the whole device are achieved.
Example two
On the basis of the first embodiment, the second embodiment of the present application provides a working method of the gradient utilization device for reverse osmosis concentrated water in the first embodiment:
s1, enabling concentrated water of the existing reverse osmosis device 10 to enter a reverse osmosis concentrated water tank 1 through a pipeline;
s2, the PLC or the DCS controls the start and stop of the reverse osmosis concentrated water pump 2, the concentrated water reverse osmosis water inlet lifting pump 3, the concentrated water reverse osmosis high-pressure pump 6 and the reverse osmosis concentrated water pump 9 in an interlocking manner according to the high and low liquid level alarms of the reverse osmosis concentrated water tank 1 and the reverse osmosis concentrated water tank 8;
s3, under normal working conditions, all reverse osmosis concentrated water in the reverse osmosis concentrated water tank 1 enters a reverse osmosis water inlet lifting pump 3 through a reverse osmosis concentrated water pump 2, and the reverse osmosis water inlet lifting pump 3 carries out pressure lifting on the reverse osmosis concentrated water from the reverse osmosis concentrated water tank 1; the reverse osmosis concentrated water with the pressure increased enters a concentrated water reverse osmosis device 7 through a concentrated water reverse osmosis inlet security filter 5 and a concentrated water reverse osmosis high-pressure pump 6; the concentrated water reverse osmosis equipment 7 carries out re-concentration treatment on the reverse osmosis concentrated water to obtain concentrated water;
s4, when the amount of water to be supplemented in the desulfurization process changes: the output of the reverse osmosis concentrated water pump 2 and the reverse osmosis concentrated water pump 9 is adjusted, the re-concentration treatment output of the concentrated water reverse osmosis equipment 7 is reduced to 0-50%, the concentrated water flows into the reverse osmosis concentrated water tank 8, and the concentrated water in the reverse osmosis concentrated water tank 8 is used as the water for the desulfurization process by the reverse osmosis concentrated water pump 9 and is supplemented into the water supplementing tank 4 for the desulfurization process; and the concentrated water is used for replenishing water in the absorption tower; or according to the water consumption of the desulfurization process of the wet desulfurization system, the concentrated water in the reverse osmosis concentrated water tank 1 is used as the water for the desulfurization process and is supplemented to the desulfurization process water supplementing tank 4 through the reverse osmosis concentrated water pump 2, and the reverse osmosis concentrated water collected by the desulfurization process water supplementing tank 4 is used as the process water supplementing of the wet desulfurization system.
Claims (7)
1. A reverse osmosis concentrated water gradient utilization device is characterized in that a reverse osmosis concentrated water tank (1), a reverse osmosis concentrated water pump (2), a concentrated water reverse osmosis inlet lifting pump (3), a concentrated water reverse osmosis inlet safety filter (5), a concentrated water reverse osmosis high-pressure pump (6), a concentrated water reverse osmosis device (7), a reverse osmosis concentrated water tank (8) and a reverse osmosis concentrated water pump (9) are further arranged on the basis of the conventional reverse osmosis device (10) and a desulfurization process water replenishing tank (4); wherein the concentrated water refers to the water produced by the water treatment desalination process and has higher concentration than the concentrated water;
the inlet of the reverse osmosis concentrated water tank (1) is connected with a concentrated water port of the existing reverse osmosis device (10), and the outlet of the reverse osmosis concentrated water tank (1) is divided into two paths to be respectively connected with the inlet of a reverse osmosis concentrated water pump (2) and the inlet of a concentrated water reverse osmosis water inlet lifting pump (3); the export of reverse osmosis concentrated water pump (2) is connected to desulfurization process moisturizing case (4) entry, dense water reverse osmosis lift pump (3) exit linkage reverse osmosis cartridge filter (5) entry of intaking, reverse osmosis water cartridge filter (5) exit linkage dense water reverse osmosis high-pressure pump (6) entry, dense water reverse osmosis high-pressure pump (6) exit linkage dense water reverse osmosis equipment (7), the dense water export of dense water reverse osmosis equipment (7) inserts the dense pond of reverse osmosis (8) entry, the product water export access retrieval and utilization point of dense water reverse osmosis equipment (7), reverse osmosis dense pond (8) exit linkage reverse osmosis dense water pump (9) entry, reverse osmosis dense water pump (9) exit linkage desulfurization process moisturizing case (4) entry.
2. A reverse osmosis concentrate gradient utilization apparatus according to claim 1, wherein: the reverse osmosis concentrated water tank (8) and the reverse osmosis concentrated water tank (1) are built together; the reverse osmosis concentrated water tank (1) and the reverse osmosis concentrated water tank (8) are both of underground steel concrete structures, and glass fiber reinforced plastics with an anti-corrosion effect are arranged on the inner walls of the reverse osmosis concentrated water tank (8) and the reverse osmosis concentrated water tank (1).
3. A reverse osmosis concentrate gradient utilization apparatus according to claim 1, wherein: the reverse osmosis concentrated water pump (2), the concentrated water reverse osmosis water inlet lifting pump (3), the concentrated water reverse osmosis high-pressure pump (6) and the reverse osmosis concentrated water pump (9) are all made of corrosion-resistant materials.
4. A reverse osmosis concentrate gradient utilization apparatus according to claim 1, wherein: the high-pressure pump (6) of the reverse osmosis of the concentrated water adopts frequency conversion adjustment, and the reverse osmosis equipment (7) of the concentrated water adopts an anti-pollution membrane component.
5. A reverse osmosis concentrate gradient utilization apparatus according to claim 1, wherein: the reverse osmosis concentrated water gradient utilization device is connected to an auxiliary control PLC or DCS, and the reverse osmosis concentrated water pump (2), the concentrated water reverse osmosis water inlet lifting pump (3), the concentrated water reverse osmosis high-pressure pump (6) and the reverse osmosis concentrated water pump (9) are simultaneously and electrically connected with the PLC or DCS.
6. A method of operating a reverse osmosis concentrate gradient utilization apparatus as claimed in claim 1, comprising the steps of:
s1, enabling concentrated water of the existing reverse osmosis device (10) to enter a reverse osmosis concentrated water tank (1) through a pipeline;
s2, the PLC or the DCS controls the start and stop of the reverse osmosis concentrated water pump (2), the concentrated water reverse osmosis water inlet lifting pump (3), the concentrated water reverse osmosis high-pressure pump (6) and the reverse osmosis concentrated water pump (9) in a linkage mode according to the high and low liquid level alarm of the reverse osmosis concentrated water tank (1) and the reverse osmosis concentrated water tank (8);
s3, under normal working conditions, all reverse osmosis concentrated water in the reverse osmosis concentrated water tank (1) enters a reverse osmosis water inlet lifting pump (3) through a reverse osmosis concentrated water pump (2), and the reverse osmosis water inlet lifting pump (3) carries out pressure lifting on the reverse osmosis concentrated water from the reverse osmosis concentrated water tank (1); the reverse osmosis concentrated water with the pressure increased enters a concentrated water reverse osmosis device (7) through a concentrated water reverse osmosis inlet security filter (5) and a concentrated water reverse osmosis high-pressure pump (6); the concentrated water reverse osmosis equipment (7) carries out re-concentration treatment on the reverse osmosis concentrated water to obtain concentrated water;
s4, when the amount of water to be supplemented in the desulfurization process changes: the output of the reverse osmosis concentrated water pump (2) and the reverse osmosis concentrated water pump (9) is adjusted, the re-concentration treatment output of the concentrated water reverse osmosis equipment (7) is reduced to 0-50%, the concentrated water flows into the reverse osmosis concentrated water tank (8), and the concentrated water in the reverse osmosis concentrated water tank (8) is used as the water for the desulfurization process by the reverse osmosis concentrated water pump (9) and is supplemented into the water supplementing tank (4) for the desulfurization process; and the concentrated water is used for replenishing water in the absorption tower; or according to the water consumption of the desulfurization process of the wet desulfurization system, the concentrated water in the reverse osmosis concentrated water tank (1) is used as the water for the desulfurization process and is supplemented to the desulfurization process water supplementing tank (4) through the reverse osmosis concentrated water pump (2), and the reverse osmosis concentrated water collected by the desulfurization process water supplementing tank (4) is used as the process water supplementing of the wet desulfurization system.
7. The operation method of a reverse osmosis concentrated water gradient utilization device according to claim 6, characterized in that: and in the step S4, the water yields of the reverse osmosis concentrated water pump (2) and the reverse osmosis concentrated water pump (9) are added to meet the requirement of the wet desulphurization system on the total water consumption.
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| CN111170524A (en) * | 2020-01-14 | 2020-05-19 | 上海申能崇明发电有限公司 | Reverse osmosis concentrated water recycling method |
| CN112174412A (en) * | 2020-08-31 | 2021-01-05 | 黄山市白岳活性白土有限公司 | Method for recycling reclaimed water in high-salt-content wastewater |
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