CN105000635A - Iron phosphate wastewater zero discharging treatment device and method - Google Patents
Iron phosphate wastewater zero discharging treatment device and method Download PDFInfo
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- CN105000635A CN105000635A CN201510506293.5A CN201510506293A CN105000635A CN 105000635 A CN105000635 A CN 105000635A CN 201510506293 A CN201510506293 A CN 201510506293A CN 105000635 A CN105000635 A CN 105000635A
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Abstract
The invention relates to an iron phosphate wastewater zero discharging treatment device and method. The device structurally comprises an iron phosphate wastewater adjusting tank, a primary reverse osmosis device, a primary reverse-osmosis concentrated water tank, a concentrated water reverse osmosis device, a concentrated water reverse-osmosis concentration tank, a secondary reverse osmosis device, a secondary reverse-osmosis production water tank and a middle water tank. The treatment method comprises steps as follows: (1), iron phosphate wastewater is preliminarily concentrated and purified through the iron phosphate wastewater adjusting tank, the primary reverse osmosis device, the primary reverse-osmosis concentrated water tank and the middle water tank, and primary reverse osmosis production water and primary reverse osmosis concentrated water are separated out; (2), further concentration is performed through the concentrated water reverse osmosis device and the concentrated water reverse-osmosis concentration tank, and concentrated water is recovered and sent to a compound fertilizer factory; (3), purification treatment is performed through the secondary reverse osmosis device and the secondary reverse-osmosis production water tank, pure production water is generated and recycled for a production system, and concentrated water after secondary reverse osmosis treatment is returned to the iron phosphate wastewater adjusting tank for retreatment. The iron phosphate wastewater zero discharging treatment device and method have the advantages as follows: real zero discharging of iron phosphate wastewater is realized.
Description
Technical field
What the present invention relates to is tertiary iron phosphate wastewater zero discharge treatment unit and method thereof, belongs to the technical field of Industrial Wastewater Treatment.
Background technology
Tertiary iron phosphate waste water is that the high density produced in battery positive pole material phosphoric acid iron production process contains ammonia nitrogen (NH
3-N), sulfate radical (SO
4 2-), the acid mineral waste water of total phosphorus (TP), the pollutent in tertiary iron phosphate waste water is expressed as NH by ion
4 +(ammonium radical ion), SO
4 2-(sulfate ion), PO
4 3-(phosphate anion), current treatment process mostly is removes total phosphorus by feeding lime, directly discharges when not considering that total salt exceeds standard, and produces a large amount of mud and is difficult to process, cause larger impact simultaneously on the water body environment of surrounding.Along with the raising of environmental regulation, during discharge of wastewater, the requirement of total salt is progressively improved, need to carry out zero discharge treatment to tertiary iron phosphate waste water, while the pollution problem solving tertiary iron phosphate waste water, a large amount of water resourcess can be saved again, the effective constituent reclaimed in tertiary iron phosphate waste water is used for composite heat transfer, turns waste into wealth, reaches zero discharge treatment truly.
Summary of the invention
What the present invention proposed is a kind of tertiary iron phosphate wastewater zero discharge treatment unit and method thereof, its object is exactly for current tertiary iron phosphate wastewater treatment Problems existing, is intended to utilize first-stage reverse osmosis device, second level reverse osmosis apparatus, dense water reverse osmosis unit carries out zero discharge treatment to tertiary iron phosphate waste water.The NH of tertiary iron phosphate waste water before process
4 +(ammonium radical ion): 1000 ~ 3000mg/L, PO
4 3-(phosphate anion): 1500 ~ 3500mg/L, SO
4 2-(sulfate ion): 4000 ~ 7000mg/L, TDS (total dissolved solid): 6500 ~ 13500mg/L, produces the NH that pure water requires after process
4 +(ammonium radical ion)≤1mg/L, PO
4 3-(phosphate anion)≤0.5mg/L, SO
4 2-(sulfate ion)≤2.5mg/L, TDS (total dissolved solid)≤4mg/L, the clearance of each ion all reaches>=and 99.9%, the NH of the tertiary iron phosphate Waste water concentrating liquid of recovery
4 +(ammonium radical ion): 15000 ~ 36000mg/L, PO
4 3-(phosphate anion): 22500 ~ 42000mg/L, SO
4 2-(sulfate ion): 60000 ~ 84000mg/L, TDS (total dissolved solid): 100000 ~ 152000mg/L.It not only solves the pollution problem of tertiary iron phosphate waste water, process water outlet reaches the standard of producing pure water and is back to use production water system, save a large amount of water resourcess, the tertiary iron phosphate Waste water concentrating liquid reclaimed can directly as the raw material of production composite fertilizer, also can directly evaporate be separated generate contains sodium sulfate, mixing salt that ammonium sulfate, phosphoric acid are pressed, namely reach the requirement of environmental protection, reach again the object of tertiary iron phosphate wastewater zero discharge process.
Technical solution of the present invention: tertiary iron phosphate wastewater zero discharge treatment unit, is characterized in that comprising tertiary iron phosphate wastewater equalization pond 1, first-stage reverse osmosis device 2, the dense water tank of first-stage reverse osmosis 3, dense water reverse osmosis unit 4, the reverse osmosis concentrated water tank 5 of dense water, second level reverse osmosis apparatus 6, two-pass reverse osmosis product water tank 7 and intermediate water tank 8; Wherein tertiary iron phosphate waste water receives the water-in of tertiary iron phosphate wastewater equalization pond 1, the water outlet of tertiary iron phosphate wastewater equalization pond 1 connects the water-in of first-stage reverse osmosis device 2 through lift pump, the dense water out of first-stage reverse osmosis device 2 connects the water-in of the dense water tank 3 of first-stage reverse osmosis, and the product water out of first-stage reverse osmosis device 2 connects the water-in of intermediate water tank 8; The water outlet of the dense water tank of first-stage reverse osmosis 4 connects the water-in of dense water reverse osmosis unit 4 by topping-up pump, the product water out of dense water reverse osmosis unit 4 also connects the water-in of intermediate water tank 8, the dense water out of dense water reverse osmosis unit 4 connects the water-in of the reverse osmosis concentrated water tank 5 of dense water, and the water outlet of the reverse osmosis concentrated water tank 5 of dense water is as the raw materials recovery of composite fertilizer; The water outlet of intermediate water tank 8 connects the water-in of second level reverse osmosis apparatus 6 by line pump, the product water out of second level reverse osmosis apparatus 6 connects the water-in that two-pass reverse osmosis produces water tank 7, two-pass reverse osmosis produces the water outlet of water tank 7 by pure water pump loopback production system, and the dense water out of second level reverse osmosis apparatus 6 is connected to the refluxing opening of tertiary iron phosphate wastewater equalization pond 1.
Its treatment process, comprises the steps:
1) tertiary iron phosphate waste water carries out preliminary concentrated and purification by tertiary iron phosphate wastewater equalization pond, first-stage reverse osmosis device, the dense water tank of first-stage reverse osmosis, intermediate water tank, isolates first-stage reverse osmosis and produces water and the dense water of first-stage reverse osmosis;
2) the dense water of first-stage reverse osmosis is further concentrated by dense water reverse osmosis unit, the reverse osmosis concentrated water tank of dense water again, reclaims dense water and sends to factory of composite fertilizer;
3) the product water that first-stage reverse osmosis produces water and dense water reverse osmosis produces water tank by second level reverse osmosis apparatus, two-pass reverse osmosis again and carries out further purification processes, thus produces high-quality production pure water, is back to production system; The dense water of two-pass reverse osmosis returns tertiary iron phosphate wastewater equalization pond and again processes.
Advantage of the present invention:
1) for the feature of tertiary iron phosphate waste water, high density is containing ammonia nitrogen (NH
3-N), sulfate radical (SO
4 2-), the acid mineral waste water of total phosphorus (TP), adopt advanced membrane technology to carry out unitized design.Its treatment process process first utilizes first-stage reverse osmosis device to carry out preliminary concentrated and purifying treatment to tertiary iron phosphate waste water, produces the dense water of first-stage reverse osmosis and product water;
2) utilize the dense water of dense water reverse osmosis unit to first-stage reverse osmosis to carry out the concentrated of the degree of depth, the dense water of dense water reverse osmosis as the raw material of composite fertilizer, high efficiente callback nitrogen phosphate and sulfur element; And the product water of the product water of first-stage reverse osmosis and dense water reverse osmosis is again through the further purification of second level reverse osmosis apparatus, high-purity product Water circulation of two-pass reverse osmosis is to production system, and the dense water of two-pass reverse osmosis returns first-stage reverse osmosis and again processes; Thus tertiary iron phosphate waste water is reached to the object of zero discharge treatment truly.
Accompanying drawing explanation
Accompanying drawing 1 is the overall structure schematic diagram of tertiary iron phosphate wastewater zero discharge treatment unit.
Accompanying drawing 2 is water balance figure of tertiary iron phosphate wastewater zero discharge treatment unit embodiment.
Embodiment
Contrast accompanying drawing 1, tertiary iron phosphate wastewater zero discharge treatment unit, its structure comprises tertiary iron phosphate wastewater equalization pond 1, first-stage reverse osmosis device 2, the dense water tank of first-stage reverse osmosis 3, dense water reverse osmosis unit 4, the reverse osmosis concentrated water tank 5 of dense water, second level reverse osmosis apparatus 6, two-pass reverse osmosis product water tank 7 and intermediate water tank 8;
Wherein tertiary iron phosphate waste water receives the water-in of tertiary iron phosphate wastewater equalization pond 1, the water outlet of tertiary iron phosphate wastewater equalization pond 1 connects the water-in of first-stage reverse osmosis device 2 through lift pump, the dense water out of first-stage reverse osmosis device 2 connects the water-in of the dense water tank 3 of first-stage reverse osmosis, and the product water out of first-stage reverse osmosis device 2 connects the water-in of intermediate water tank 8; The water outlet of the dense water tank of first-stage reverse osmosis 3 connects the water-in of dense water reverse osmosis unit 4 by topping-up pump, the product water out of dense water reverse osmosis unit 4 also connects the water-in of intermediate water tank 8, the dense water out of dense water reverse osmosis unit 4 connects the water-in of the reverse osmosis concentrated water tank 5 of dense water, and the water outlet of the reverse osmosis concentrated water tank 5 of dense water is as the raw materials recovery of composite fertilizer; The water outlet of intermediate water tank 8 connects the water-in of second level reverse osmosis apparatus 6 by line pump, the product water out of second level reverse osmosis apparatus 6 connects the water-in that two-pass reverse osmosis produces water tank 7, two-pass reverse osmosis produces the water outlet of water tank 7 by pure water pump loopback production system, and the dense water out of second level reverse osmosis apparatus 6 is connected to the refluxing opening of tertiary iron phosphate wastewater equalization pond 1.
Tertiary iron phosphate wastewater zero emission treatment method, comprises the steps:
(1) tertiary iron phosphate waste water carries out preliminary concentrated and purification by tertiary iron phosphate wastewater equalization pond, first-stage reverse osmosis device, the dense water tank of first-stage reverse osmosis, intermediate water tank, isolates first-stage reverse osmosis and produces water and the dense water of first-stage reverse osmosis;
(2) the dense water of first-stage reverse osmosis is further concentrated by dense water reverse osmosis unit, the reverse osmosis concentrated water tank of dense water again, reclaims dense water and sends to factory of composite fertilizer;
(3) the product water that first-stage reverse osmosis produces water and dense water reverse osmosis produces water tank by second level reverse osmosis apparatus, two-pass reverse osmosis again and carries out further purification processes, thus produces high-quality production pure water, is back to production system; The dense water of two-pass reverse osmosis returns tertiary iron phosphate wastewater equalization pond and again processes.
Described step (1) tertiary iron phosphate waste water carries out preliminary concentrated and purification by tertiary iron phosphate wastewater equalization pond, first-stage reverse osmosis device, the dense water tank of first-stage reverse osmosis, intermediate water tank, isolates first-stage reverse osmosis and produces water and the dense water of first-stage reverse osmosis; Specifically first tertiary iron phosphate waste water enter tertiary iron phosphate wastewater equalization pond and carry out water quality and the balanced of the water yield and adjustment, the water outlet of tertiary iron phosphate wastewater equalization pond is squeezed into first-stage reverse osmosis device by lift pump and is carried out preliminary concentrated and purification separation, the dense water of first-stage reverse osmosis device enters the dense water tank of first-stage reverse osmosis, and the product water of first-stage reverse osmosis device enters intermediate water tank; Wherein first-stage reverse osmosis device comprises first-stage reverse osmosis cartridge filter, first-stage reverse osmosis high-pressure pump, two sections of film groups of first-stage reverse osmosis, first-stage reverse osmosis inter-section booster; thus utilize first-stage reverse osmosis cartridge filter to protect first-stage reverse osmosis film; first-stage reverse osmosis high-pressure pump is utilized to provide high pressure needed for first-stage reverse osmosis desalination; thus effectively concentrate and purification separation; utilize first-stage reverse osmosis inter-section booster to improve the producing water ratio of first-stage reverse osmosis simultaneously, reach first-stage reverse osmosis producing water ratio >=75%, ratio of desalinization >=98%.Tertiary iron phosphate waste water quality is: NH
4 +(ammonium radical ion): 1000 ~ 3000mg/L, PO
4 3-(phosphate anion): 1500 ~ 3500mg/L, SO
4 2-(sulfate ion): 4000 ~ 7000mg/L, TDS (total dissolved solid): 6500 ~ 13500mg/L.
The described dense water of step (2) first-stage reverse osmosis is further concentrated by dense water reverse osmosis unit, the reverse osmosis concentrated water tank of dense water again; The dense water of first-stage reverse osmosis specifically in the dense water tank of first-stage reverse osmosis is squeezed into dense water reverse osmosis unit by topping-up pump and is carried out the concentrated and purification separation of the degree of depth, the dense water of dense water reverse osmosis unit enters the reverse osmosis concentrated water tank of dense water, reclaim dense water and send to factory of composite fertilizer, the product water of dense water reverse osmosis unit enters intermediate water tank; Wherein dense water reverse osmosis unit comprises dense water reverse osmosis cartridge filter, dense water reverse osmosis high-pressure pump, two sections of film groups of dense water reverse osmosis, dense water reverse osmosis inter-section booster; thus utilize dense water reverse osmosis cartridge filter to protect dense water reverse osmosis membrane; dense water reverse osmosis high-pressure pump is utilized to provide high pressure needed for dense water reverse osmosis desalination; thus carry out the concentrated of the degree of depth and purification separation; utilize dense water reverse osmosis inter-section booster to improve the producing water ratio of dense water reverse osmosis simultaneously, reach dense water reverse osmosis produced water rate >=60%, ratio of desalinization >=98%.The NH of the tertiary iron phosphate Waste water concentrating liquid reclaimed
4 +(ammonium radical ion): 15000 ~ 36000mg/L, PO
4 3-(phosphate anion): 22500 ~ 42000mg/L, SO
4 2-(sulfate ion): 60000 ~ 84000mg/L, TDS (total dissolved solid): 100000 ~ 152000mg/L.
The product water that described step (3) first-stage reverse osmosis produces water and dense water reverse osmosis passes through second level reverse osmosis apparatus again, two-pass reverse osmosis produces water tank and carries out further purification processes, first-stage reverse osmosis product water specifically in intermediate water tank and dense water reverse osmosis produced water are squeezed into second level reverse osmosis apparatus by middle water pump and are further purified, the product water of second level reverse osmosis apparatus reaches qualified production pure water requirement, the product water of second level reverse osmosis apparatus enters two-pass reverse osmosis and produces water tank, production system is sent for blowback outward by pure water, the dense water of second level reverse osmosis apparatus returns equalizing tank and again processes, wherein second level reverse osmosis apparatus comprises two sections of film groups of two-pass reverse osmosis cartridge filter, two-pass reverse osmosis high-pressure pump, two-pass reverse osmosis, thus utilize two-pass reverse osmosis cartridge filter to protect two-pass reverse osmosis film, two-pass reverse osmosis high-pressure pump is utilized to provide the high pressure of two-pass reverse osmosis desalination, effectively purify, reach two-pass reverse osmosis and produce water conductivity≤10 μ S/cm, total dissolved solid≤4mg/L, producing water ratio >=90%.
embodiment:
For certain new forms of energy enterprise produces the project assorted 3960m of 10,000 tons of tertiary iron phosphates per year
3/ D(165m
3/ H) tertiary iron phosphate wastewater zero discharge process engineering
1. design water quality and the water yield
(1) influent quality and the water yield is designed
| Project | NH 4 +(mg/L) | PO 4 3-(mg/L) | SO 4 2-(mg/L) | pH | Water temperature (DEG C) |
| Tertiary iron phosphate waste water | 1905 | 2387 | 5558 | 2.4 | 30 |
The tertiary iron phosphate comprehensive wastewater water yield is 3960m
3/ D(165m
3/ H).
(2) pure water water quality and the water yield is produced
Produce pure water water quality requirement and reach specific conductivity≤10 μ S/cm, TDS≤4mg/L, produce the pure water water yield>=3636m
3/ D(151.5m
3/ H).
(4) dense water water quality and the water yield is reclaimed
Reclaim dense water water quality requirement and reach TDS>=130000mg/L, reclaim the dense water water yield≤324m
3/ D (13.5m
3/ H).
2. each cell processing effect
The treatment effect of first-stage reverse osmosis device, second level reverse osmosis apparatus, dense water reverse osmosis unit is as shown in the table:
3. water balance
The water balance figure of tertiary iron phosphate wastewater zero discharge treatment unit is see accompanying drawing 2.
4. each system significant parameter
(1) tertiary iron phosphate wastewater equalization pond
Tertiary iron phosphate wastewater equalization pond: V=700m
3steel concrete inner lining glass fiber reinforced plastic is anticorrosion, 1 (point 2 lattice);
Join lift pump: Q=100m
3/ H, H=30m, N=15kW, flow passage components SS316L, 3 (2 is standby with 1).
(2) first-stage reverse osmosis device
First-stage reverse osmosis cartridge filter: 100m
3/ H, material SS316L, filtering accuracy 5 μm, 2;
First-stage reverse osmosis high-pressure pump (frequency conversion): 100m
3/ H, H=280m, N=132kW, flow passage components SS316L, 2;
First-stage reverse osmosis two sections of film group: 70m
3/ H, 8:4X7 arrangement, average flux 21.8LMH, 2;
First-stage reverse osmosis inter-section booster (frequency conversion): 52m
3/ H, H=80m, N=18.5kW, flow passage components SS316L, 2;
First-stage reverse osmosis concentrate recirculation amount: 0 ~ 20m
3/ H.
(3) the dense water tank of first-stage reverse osmosis
The dense water tank of first-stage reverse osmosis: V=20m
3, material PE, 1;
Add press pump: Q=50m
3/ H, H=30m, N=7.5kW, flow passage components SS316L, 2 (1 is standby with 1)
(4) dense water reverse osmosis unit
Dense water reverse osmosis cartridge filter: 50m
3/ H, material SS316L, filtering accuracy 5 μm, 1;
Dense water reverse osmosis high-pressure pump (frequency conversion): 64m
3/ H, H=610m, N=160kW, flow passage components SS316L, 1;
Dense water reverse osmosis equipment: 32m
3/ H, 8:4X7 arrangement, average flux 10.2LMH, 1;
Dense water reverse osmosis inter-section booster: 40m
3/ H, H=150m, N=30kW, flow passage components SS316L, 1;
Dense water reverse osmosis concentrated water quantity of reflux: 18m
3/ H.
(5) the reverse osmosis concentrated water tank of dense water
The reverse osmosis concentrated water tank of dense water: V=150m
3, material carbon steel inner lining glass fiber reinforced plastic is anticorrosion, 1;
Join the dense water of recovery and send pump outside: Q=25m
3/ H, H=30m, N=4kW, flow passage components SS316L, 2 (1 is standby with 1)
(6) intermediate water tank
Intermediate water tank: V=40m
3, material PE, 1;
Join middle water pump: Q=85m
3/ H, H=30m, N=11kW, flow passage components SS316L, 3 (2 is standby with 1)
(7) second level reverse osmosis apparatus
Two-pass reverse osmosis cartridge filter: 100m
3/ H, filtering accuracy 5 μm, material SS316L, 2;
Two-pass reverse osmosis high-pressure pump (frequency conversion): 85m
3/ H, H=170m, N=60kW, flow passage components SS316L, 2;
Two-pass reverse osmosis two sections of film group: 76m
3/ H, 8:4X6 arrangement, average flux 27.8LMH, 2.
(8) two-pass reverse osmosis produces water tank
Two-pass reverse osmosis produces water tank: V=150 m
3, material SS304, assembled water tank, 1;
Join pure water working shaft: 76m
3/ H, H=50m, N=15kW, flow passage components SS316L, 2.
(9) reverse osmosis chemical cleaning system
Cleaning water tank: V=6m
3, material PE, 1;
Flushing water pump: 50m
3/ H, H=30m, N=7.5kW, flow passage components SS316L, 2;
Filter rinsed: 50m
3/ H, filtering accuracy 5 μm, material SS316L, 2.
(10) corollary system
Supporting: medicine system, pipeline, valve, automatic control, instrument, the system such as electric.
Claims (9)
1. tertiary iron phosphate wastewater zero discharge treatment unit, is characterized in that comprising tertiary iron phosphate wastewater equalization pond, first-stage reverse osmosis device, the dense water tank of first-stage reverse osmosis, dense water reverse osmosis unit, the reverse osmosis concentrated water tank of dense water, second level reverse osmosis apparatus, two-pass reverse osmosis product water tank and intermediate water tank;
Wherein tertiary iron phosphate waste water receives the water-in of tertiary iron phosphate wastewater equalization pond, the water outlet of tertiary iron phosphate wastewater equalization pond connects the water-in of first-stage reverse osmosis device through lift pump, the dense water out of first-stage reverse osmosis device connects the water-in of the dense water tank of first-stage reverse osmosis, and the product water out of first-stage reverse osmosis device connects the water-in of intermediate water tank; The water outlet of the dense water tank of first-stage reverse osmosis connects the water-in of dense water reverse osmosis unit by topping-up pump, the product water out of dense water reverse osmosis unit also connects the water-in of intermediate water tank, the dense water out of dense water reverse osmosis unit connects the water-in of the reverse osmosis concentrated water tank of dense water, and the water outlet of the reverse osmosis concentrated water tank of dense water is as the raw materials recovery of composite fertilizer; The water outlet of intermediate water tank connects the water-in of second level reverse osmosis apparatus by line pump, the product water out of second level reverse osmosis apparatus connects the water-in that two-pass reverse osmosis produces water tank, two-pass reverse osmosis produces the water outlet of water tank by pure water pump loopback production system, and the dense water out of second level reverse osmosis apparatus is connected to the refluxing opening of tertiary iron phosphate wastewater equalization pond.
2. tertiary iron phosphate wastewater zero emission treatment method, is characterized in that comprising the steps:
(1) tertiary iron phosphate waste water carries out preliminary concentrated and purification by tertiary iron phosphate wastewater equalization pond, first-stage reverse osmosis device, the dense water tank of first-stage reverse osmosis, intermediate water tank, isolates first-stage reverse osmosis and produces water and the dense water of first-stage reverse osmosis;
(2) the dense water of first-stage reverse osmosis is further concentrated by dense water reverse osmosis unit, the reverse osmosis concentrated water tank of dense water again, reclaims dense water and sends to factory of composite fertilizer;
(3) the product water that first-stage reverse osmosis produces water and dense water reverse osmosis produces water tank by second level reverse osmosis apparatus, two-pass reverse osmosis again and carries out further purification processes, thus produces high-quality production pure water, is back to production system; The dense water of two-pass reverse osmosis returns tertiary iron phosphate wastewater equalization pond and again processes.
3. tertiary iron phosphate wastewater zero emission treatment method as claimed in claim 2, it is characterized in that described step (1) tertiary iron phosphate waste water carries out preliminary concentrated and purification by tertiary iron phosphate wastewater equalization pond, first-stage reverse osmosis device, the dense water tank of first-stage reverse osmosis, intermediate water tank, isolate first-stage reverse osmosis and produce water and the dense water of first-stage reverse osmosis.
4. tertiary iron phosphate wastewater zero emission treatment method as claimed in claim 3, it is characterized in that first described tertiary iron phosphate waste water enter tertiary iron phosphate wastewater equalization pond and carry out water quality and the balanced of the water yield and adjustment, the water outlet of tertiary iron phosphate wastewater equalization pond is squeezed into first-stage reverse osmosis device by lift pump and is carried out preliminary concentrated and purification separation, the dense water of first-stage reverse osmosis device enters the dense water tank of first-stage reverse osmosis, and the product water of first-stage reverse osmosis device enters intermediate water tank.
5. tertiary iron phosphate wastewater zero emission treatment method as claimed in claim 4, it is characterized in that described first-stage reverse osmosis device comprises first-stage reverse osmosis cartridge filter, first-stage reverse osmosis high-pressure pump, two sections of film groups of first-stage reverse osmosis, first-stage reverse osmosis inter-section booster, thus utilize first-stage reverse osmosis cartridge filter to protect first-stage reverse osmosis film, first-stage reverse osmosis high-pressure pump is utilized to provide high pressure needed for first-stage reverse osmosis desalination, thus effectively concentrate and purification separation, utilize first-stage reverse osmosis inter-section booster to improve the producing water ratio of first-stage reverse osmosis simultaneously, reach first-stage reverse osmosis producing water ratio>=75%, ratio of desalinization>=98%, tertiary iron phosphate waste water quality is: NH
4 +: 1000 ~ 3000mg/L, PO
4 3-: 1500 ~ 3500mg/L, SO
4 2-: 4000 ~ 7000mg/L, total dissolved solid TDS:6500 ~ 13500mg/L.
6. tertiary iron phosphate wastewater zero emission treatment method as claimed in claim 2, is characterized in that the described dense water of step (2) first-stage reverse osmosis is further concentrated by dense water reverse osmosis unit, the reverse osmosis concentrated water tank of dense water again; The dense water of first-stage reverse osmosis specifically in the dense water tank of first-stage reverse osmosis is squeezed into dense water reverse osmosis unit by topping-up pump and is carried out the concentrated and purification separation of the degree of depth, the dense water of dense water reverse osmosis unit enters the reverse osmosis concentrated water tank of dense water, reclaim dense water and send to factory of composite fertilizer, the product water of dense water reverse osmosis unit enters intermediate water tank.
7. tertiary iron phosphate wastewater zero emission treatment method as claimed in claim 6, it is characterized in that described dense water reverse osmosis unit comprises dense water reverse osmosis cartridge filter, dense water reverse osmosis high-pressure pump, two sections of film groups of dense water reverse osmosis, dense water reverse osmosis inter-section booster, thus utilize dense water reverse osmosis cartridge filter to protect dense water reverse osmosis membrane, dense water reverse osmosis high-pressure pump is utilized to provide high pressure needed for dense water reverse osmosis desalination, thus carry out the concentrated of the degree of depth and purification separation, utilize dense water reverse osmosis inter-section booster to improve the producing water ratio of dense water reverse osmosis simultaneously, reach dense water reverse osmosis produced water rate>=60%, ratio of desalinization>=98%, the NH of the tertiary iron phosphate Waste water concentrating liquid reclaimed
4 +: 15000 ~ 36000mg/L, PO
4 3-: 22500 ~ 42000mg/L, SO
4 2-: 60000 ~ 84000mg/L, total dissolved solid TDS:100000 ~ 152000mg/L.
8. tertiary iron phosphate wastewater zero emission treatment method as claimed in claim 2, it is characterized in that the product water of described step (3) first-stage reverse osmosis product water and dense water reverse osmosis passes through second level reverse osmosis apparatus again, two-pass reverse osmosis produces water tank and carries out further purification processes, first-stage reverse osmosis product water specifically in intermediate water tank and dense water reverse osmosis produced water are squeezed into second level reverse osmosis apparatus by middle water pump and are further purified, the product water of second level reverse osmosis apparatus reaches qualified production pure water requirement, the product water of second level reverse osmosis apparatus enters two-pass reverse osmosis and produces water tank, production system is sent for blowback outward by pure water, the dense water of second level reverse osmosis apparatus returns equalizing tank and again processes.
9. tertiary iron phosphate wastewater zero emission treatment method as claimed in claim 8; it is characterized in that described second level reverse osmosis apparatus comprises two sections of film groups of two-pass reverse osmosis cartridge filter, two-pass reverse osmosis high-pressure pump, two-pass reverse osmosis; thus utilize two-pass reverse osmosis cartridge filter to protect two-pass reverse osmosis film; two-pass reverse osmosis high-pressure pump is utilized to provide the high pressure of two-pass reverse osmosis desalination; effectively purify, reach two-pass reverse osmosis and produce water conductivity≤10 μ S/cm, total dissolved solid≤4mg/L, producing water ratio >=90%.
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| CN107814394A (en) * | 2017-11-12 | 2018-03-20 | 湖南七纬科技有限公司 | A kind of processing method of ferric phosphate production waste water |
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| CN106966518A (en) * | 2016-04-20 | 2017-07-21 | 东莞汇金环境科技有限公司 | The copper facing of shielding material industry or the zero-discharge treatment system of nickel or silver waste water |
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| CN110589788A (en) * | 2019-09-17 | 2019-12-20 | 襄阳泽东新能源发展有限公司 | Method for recycling wastewater in battery-grade iron phosphate synthesis process |
| CN113955828A (en) * | 2021-11-12 | 2022-01-21 | 浙江天地环保科技股份有限公司 | Gradient utilization device for reverse osmosis concentrated water |
| CN113955828B (en) * | 2021-11-12 | 2023-11-07 | 浙江天地环保科技股份有限公司 | Reverse osmosis dense water gradient utilization device |
| CN114368854A (en) * | 2021-12-31 | 2022-04-19 | 中化(浙江)膜产业发展有限公司 | Wastewater purification system and purification method |
| CN115448272A (en) * | 2022-09-26 | 2022-12-09 | 深圳永清水务有限责任公司北京分公司 | Recycling treatment process of aged mother liquor in iron phosphate production process |
| CN115448272B (en) * | 2022-09-26 | 2024-02-02 | 深圳永清水务有限责任公司 | Recycling treatment process of aging mother liquor in iron phosphate production process |
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Application publication date: 20151028 |