CN214735234U

CN214735234U - Advanced treatment device for reclaimed water reuse

Info

Publication number: CN214735234U
Application number: CN202120839574.3U
Authority: CN
Inventors: 房军贤; 任昌明; 赵艳; 孙百爽
Original assignee: Shandong Taihe Environmental Polytron Technologies Inc
Current assignee: Shandong Taihe Environmental Polytron Technologies Inc
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2021-11-16
Anticipated expiration: 2031-04-22

Abstract

The utility model relates to a waste water treatment device technical field, concretely relates to reuse of reclaimed water advanced treatment unit. The reclaimed water recycling advanced treatment device comprises an MBR membrane tank, an MBR water production tank, an UF device, an UF water production tank, a 1# RO device, a 1# reaction tank, a 1# GM device, a water production tank, a 2# RO device and a recycling water tank, wherein the 1# RO device is connected with the recycling water tank; the 2# RO device, the 2# reaction tank, the 2# GM device and the NF device are connected with the water production tank and the high-pressure reverse osmosis device; the NF device is connected with the concentrated water tank and the DTRO device, the high-pressure reverse osmosis device is connected with the DTRO device in parallel and then connected with the 1# reaction tank, and the high-pressure reverse osmosis device is connected with the evaporative crystallization device a; the DTRO device is connected with the evaporative crystallization device b. The utility model provides a reuse of reclaimed water advanced treatment unit has solved and can both obtain innoxious utilization as a resource.

Description

Advanced treatment device for reclaimed water reuse

Technical Field

The utility model relates to a waste water treatment device technical field, concretely relates to reuse of reclaimed water advanced treatment unit.

Background

In the fields of sewage treatment and water resource recycling, MBR (membrane bioreactor) is a novel water treatment technology combining a membrane separation unit and a biological treatment unit; DTRO is a classification of DT, namely a disc-tube type membrane technology, disc-tube type reverse osmosis is a membrane column consisting of a disc type membrane, a flow guide disc, an O-shaped rubber gasket, a central pull rod and a pressure-resistant sleeve, and can tolerate higher suspended matters and SDI when treating percolate, namely the blocking is avoided at a popular point; the ceramic membrane (GM) is one of inorganic membranes, belongs to a solid membrane material in the membrane separation technology, is mainly prepared by taking inorganic ceramic materials of alumina, zirconia, titania, silica and the like with different specifications as a support body and carrying out surface coating and high-temperature firing, and compared with the traditional polymer separation membrane material, the ceramic membrane has good chemical stability, and can resist acid, alkali and organic solvents; the mechanical strength is high, and the back flushing can be realized; the antimicrobial capability is strong; high temperature resistance; narrow pore size distribution, high separation efficiency and the like; reverse osmosis (abbreviated as RO) is a kind of membrane separation technology, which works by means of the characteristic that a reverse osmosis membrane separates a solvent and a solute in a solution under pressure, and "osmosis" is a physical phenomenon, in which reverse osmosis means that water containing salts and various fine impurities (i.e., raw water) is permeated from the higher concentration side to the lower concentration side by applying a pressure greater than that of natural osmosis, and a reverse osmosis apparatus is used for passing the raw water through a fine filter, a granular activated carbon filter, a compressed activated carbon filter, etc., and then pressurizing by a pump, and a reverse osmosis membrane (RO membrane) having a pore diameter of 1/10000 μm is used to change the higher concentration water into the lower concentration water, and simultaneously, impurities mixed into water in large quantities such as industrial pollutants, heavy metals, bacteria, viruses, etc. are all isolated, thereby achieving the physicochemical index and sanitary standard specified for drinking, and producing clean water, the GRO is the best choice for supplementing high-quality moisture to human body in time, and the GRO is high-pressure permeation; ultrafiltration (UF) is a pressure-driven membrane separation process that uses the interception capability of porous materials to separate particulate matter from fluids and dissolved components, and ultrafiltration, a membrane process between Microfiltration (MF) and Nanofiltration (NF).

The traditional treatment method of high-salt and high-hardness wastewater is to concentrate monovalent ions and divalent ions at the same time, the salt content in the wastewater is high, the osmotic pressure is high, and the reverse osmosis concentration is also restricted, so that the concentration multiple cannot be very high.

Along with the increasingly strict environmental protection requirements, the final treatment mode of the wastewater not only needs to be recycled, but also needs to realize zero discharge, and needs high-power concentration and evaporation treatment to realize zero discharge, and the prior treatment process mainly has the following problems that firstly, magnesium hydroxide crystals are fine and suspended in water, are not easy to settle, the filtering effect of sand filtration on the magnesium hydroxide crystals is poor, and the residual magnesium hydroxide in the water causes large subsequent acid adding amount and increases the salt content in the water; secondly, the reverse osmosis concentration multiple is not high, and the evaporation cost is high; thirdly, the traditional concentration is that monovalent ions and divalent ions are concentrated at the same time, the salt content in water is high, the osmotic pressure is high, and the concentration multiple of reverse osmosis is limited to be not high. In addition, the prior univalent divalent salt is evaporated and crystallized simultaneously to form mixed salt, which belongs to solid waste, has high treatment cost, and causes heavy burden on enterprises and environmental pollution. Aiming at the problems in the prior art, a reclaimed water recycling advanced treatment technology is researched and developed, and the defects in the prior art are overcome.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a reuse of reclaimed water advanced treatment unit, the problem of the waste water to the high rigidity of high salt has been solved, and is with high costs, the overweight problem of enterprise's burden alleviates the pollution of environment, realizes the whole retrieval and utilization of product water of high salt water, improves the purity and the quality of crystal salt, and NaCl purity is more than or equal to 95% industrial salt, reaches the standard of the refined industrial salt of second grade, and the glauber's salt that purity is high, and the salt of aquatic can both obtain innoxious resource utilization.

The utility model discloses a reuse of reclaimed water advanced treatment unit, including domestic sewage inlet tube and MBR membrane cisterna connection, MBR membrane cisterna and MBR produce the pond and be connected, MBR produces the pond and is connected with the UF device, the UF device produces the water tank with UF and is connected, the water tank is produced to UF and is connected with 1# RO device, 1# RO device and 1# reaction tank are connected, 1# reaction tank and 1# GM device, 1# GM device and 1# GM produce the water tank and be connected, 1# GM product water tank and 2# RO device are connected, 2# RO device and retrieval and utilization water tank are connected, 1# RO device is connected with the retrieval and utilization water tank simultaneously;

the 2# RO device is connected with the 2# reaction tank, the 2# reaction tank is connected with the 2# GM device, the 2# GM device is connected with the NF device, the NF device is connected with the NF production water tank, and the NF production water tank is connected with the high-pressure reverse osmosis device;

the NF device is connected with the NF concentrated water tank, the NF concentrated water tank is connected with the DTRO device, and the high-pressure reverse osmosis device is connected with the DTRO device in parallel and then connected with the 1# reaction tank;

the high-pressure reverse osmosis device is connected with the evaporative crystallization device a; the DTRO device is connected with the evaporative crystallization device b.

And the MBR membrane tank and the MBR water production tank are provided with delivery pumps.

The No. 1 reaction tank is connected with a circulating sewage discharge device.

The No. 1 reaction tank is connected with a double-alkali device.

And the 1# GM production water tank is connected with an acid adding and pH adjusting device.

And the No. 2 reaction tank is connected with an alkali adding device.

An acid adding device is connected to a pipeline for connecting the No. 2 GM device with the NF device.

Specifically, reuse of reclaimed water advanced treatment unit, be connected with the MBR membrane cisterna including domestic sewage inlet tube, the MBR membrane cisterna is connected with MBR production water tank, be provided with the delivery pump between MBR membrane cisterna and MBR production water tank, MBR production water tank is connected with UF device, UF device is connected with UF production water tank, UF production water tank is connected with 1# RO device, 1# RO device is connected with 1# reaction tank, be connected with circulation blow off water device and two alkali device on the 1# reaction tank, 1# reaction tank and 1# GM device, 1# GM device is connected with 1# GM production water tank, be connected with acidification and adjust PH device on 1# GM production water tank, 1# GM production water tank is connected with 2# RO device, 2# RO device is connected with the retrieval and utilization water tank, 1# RO device is connected with the retrieval and utilization water tank simultaneously; the 2# RO device is connected with the 2# reaction tank, the 2# reaction tank is connected with an alkali adding device, the 2# reaction tank is connected with a 2# GM device, the 2# GM device is connected with an NF device, an acid adding device is connected on a pipeline connecting the 2# GM device and the NF device, the NF device is connected with an NF water production tank, and the NF water production tank is connected with a high-pressure reverse osmosis device; the NF device is connected with the NF concentrated water tank, the NF concentrated water tank is connected with the DTRO device, and the high-pressure reverse osmosis device is connected with the DTRO device in parallel and then connected with the 1# reaction tank; the high-pressure reverse osmosis device is connected with the evaporative crystallization device a; the DTRO device is connected with the evaporative crystallization device b.

The reclaimed water recycling advanced treatment device comprises the steps of:

(1) after biochemical treatment, sewage is pretreated by MBR and UF processes, after the water inlet requirement of the 1# RO device is met, the sewage enters the 1# RO device for preliminary desalination treatment, the produced water of the 1# RO device enters a water production tank to reach the standard for recycling, and the concentrated water of the 1# RO device enters a subsequent treatment unit;

(2)1# RO concentrated water and circulating sewage enter a 1# reaction tank, the 1# reaction tank is connected with a 1# double-alkali adding device, the concentrated water and the circulating sewage sequentially enter a set clarification zone after reaction and precipitation in the reaction tank, supernatant in the clarification zone enters a 1# GM device, water produced by the 1# GM device enters a water production tank, the 1# GM water produced enters a 2# RO device after the PH of the 1# GM water is adjusted by a 1# acid adding device, the 2# RO water produced reaches the standard and enters the water production tank for recycling, and the concentrated water enters a concentrated water tank;

(3) the 2# RO concentrated water tank is connected with the 2# reaction tank, the 2# reaction tank is connected with the 2# alkali adding device, the supernatant of the 2# reaction tank enters the 2# GM device, the 2# GM produced water enters the nanofiltration device after the pH value of the 2# GM produced water is adjusted by the 2# acid adding device, the nanofiltration produced water enters the produced water tank, and the concentrated water enters the concentrated water tank;

(4) nanofiltration is produced water and is got into high pressure osmotic membrane enrichment facility, and high pressure osmotic membrane enrichment facility dense water is sent to evaporation plant and is evaporated crystallization and recycle, and high pressure osmotic device produces water and flows back to 1# reaction tank, and dense water gets into the DTRO device, and DTRO produces water and flows back to 1# reaction tank, and dense water is sent to evaporation plant and is evaporated crystallization and recycle, finally realizes the whole retrieval and utilization of product water of high salt water, and the salt in the aquatic can both obtain the utilization.

The reclaimed water recycling advanced treatment device of the utility model carries out stepwise recycling treatment on the high-salinity and high-hardness wastewater, removes most calcium and magnesium ions in the treated water source by adopting a double-alkali softening and ceramic membrane combined process, reduces hardness, lightens the scaling risk of subsequent membrane concentration, and solves the difficult problem of difficult sedimentation of magnesium hydroxide; and then, the monovalent ions and the divalent ions are separately concentrated by a combined process of nanofiltration membrane filtration and membrane concentration, and are respectively classified and crystallized by adopting an evaporative crystallization/cooling crystallization process, so that the purity and the quality of the crystallized salt are improved, the industrial salt with the NaCl purity being more than or equal to 95 percent is obtained, the standard of secondary refined industrial salt is reached, and the mirabilite with high purity is obtained.

Compared with the prior art, the utility model beneficial effect who has is:

1. the advanced treatment device for reclaimed water recycling effectively removes most of calcium and magnesium ions in a water source, reduces hardness, lightens the scaling risk of subsequent membrane concentration, and solves the difficult problem that magnesium hydroxide crystals are fine and suspended in water and are not easy to settle;

2. the reclaimed water recycling advanced treatment device of the utility model separately concentrates ions with different prices, classifies and crystallizes, and improves the purity and quality of crystallized salt;

3. reclaimed water retrieval and utilization advanced treatment unit, realize the whole retrieval and utilization of product water of high salt solution, the salt content of aquatic can both obtain resource utilization.

Drawings

Fig. 1 is a schematic structural view of an advanced treatment device for reclaimed water reuse according to the present invention.

In fig. 1: 1. a domestic sewage inlet pipe; 2. an MBR membrane tank; 3. a delivery pump; 4. an MBR water producing tank; 5. a UF device; 6. a UF water production tank; 7. 1# RO device; 8. a recycling water tank; 9. a double alkali device; 10. a circulating sewage draining device; 11. a # 1 reaction tank; 12. a # 1 GM device; 13. a No. 1 GM water production tank; 14. adding acid to adjust the pH value; 15. 2# RO device; 16. an alkali adding device; 17. a 2# reaction tank; 18. a # 2 GM device; 19. an acid adding device; 20. an NF device; 21. NF produces the water tank; 22. a high pressure reverse osmosis unit; 23. an evaporative crystallization device a; 24. an evaporative crystallization device b; 25. a DTRO device; 26. NF concentrated water tank.

Detailed Description

The utility model discloses a reuse of reclaimed water advanced treatment unit, including domestic sewage inlet tube 1 and MBR membrane cisterna 2 connection, MBR membrane cisterna 2 and MBR produce the pond 4 and are connected, MBR produces the pond 4 and is connected with UF device 5, UF device 5 and UF produce the water tank 6 and are connected, UF produces the water tank 6 and is connected with 1# RO device 7, 1# RO device 7 and 1# reaction tank 11 are connected, 1

# reaction tank

11 and 1

# GM device

12, 1

# GM device

12 and 1# GM produce the water tank 13 and are connected, 1# GM produces the water tank 13 and is connected with 2

# RO device

15, 2# RO device 15 and retrieval and utilization water tank 8 are connected, 1# RO device 7 and retrieval and utilization water tank 8 are connected simultaneously;

the 2# RO device 15 is connected with the 2# reaction tank 17, the 2# reaction tank 17 is connected with the 2# GM device 18, the 2# GM device 18 is connected with the NF device 20, the NF device 20 is connected with the NF product water tank 21, and the NF product water tank 21 is connected with the high-pressure reverse osmosis device 22;

the NF device 20 is connected with an NF concentrated water tank 26, the NF concentrated water tank 26 is connected with a DTRO device 25, and the high-pressure reverse osmosis device 22 is connected with the DTRO device 25 in parallel and then connected with the No. 1 reaction tank 11;

the high-pressure reverse osmosis device 22 is connected with the evaporative crystallization device a 23; the DTRO apparatus 25 is connected to an evaporative crystallization apparatus b 24.

And the MBR membrane tank 2 and the MBR water production tank 4 are provided with a delivery pump 3.

The No. 1 reaction tank 11 is connected with a circulating sewage discharge device 10.

The No. 1 reaction tank 11 is connected with a double-alkali device 9.

The 1# GM product water tank 13 is connected with an acid adding and pH adjusting device 14.

The No. 2 reaction tank 17 is connected with an alkali adding device 16.

An acid adding device 19 is connected to a pipeline connecting the # 2 GM device 18 and the NF device 20.

The utility model discloses a reuse of reclaimed water advanced treatment unit, including domestic sewage inlet tube 1 and MBR membrane cisterna 2 connection, MBR membrane cisterna 2 and MBR produce the pond 4 and are connected, MBR membrane cisterna 2 and MBR produce and are provided with the delivery pump between the pond 4, MBR produces the pond 4 and is connected with UF device 5, UF device 5 and UF produce the water tank 6 and be connected, UF produces the water tank 6 and is connected with 1# RO device 7, 1# RO device 7 and 1# reaction tank 11 are connected, be connected with circulation blowdown water device 10 and two alkali device 9 on 1

# reaction tank

11, 1

# reaction tank

11 and 1

# GM device

12, 1

# GM device

12 and 1# GM produce the water tank 13 and be connected, 1# GM produces the water tank 13 and is connected with acidification and transfers

PH device

14, 1#

GM production tank

13 and 2# RO device 15 are connected, 2# RO device 15 is connected with retrieval and

utilization water tank

8, 1# RO device 7 is connected with retrieval water tank 8 simultaneously;

the 2# RO device 15 is connected with the 2# reaction tank 17, the 2# reaction tank 17 is connected with an alkali adding device 16, the 2# reaction tank 17 is connected with a 2# GM device 18, the 2# GM device 18 is connected with an NF device 20, a pipeline connecting the 2# GM device 18 with the NF device 20 is connected with an acid adding device 19, the NF device 20 is connected with an NF water production tank 21, and the NF water production tank 21 is connected with a high-pressure reverse osmosis device 22;

The advanced treatment device for reclaimed water reuse comprises the following steps of:

(1) after biochemical treatment, sewage is pretreated by MBR and UF processes, and enters a 1# RO device for preliminary desalination after reaching the water inlet requirement of the 1# RO device; the produced water of the 1# RO device enters a water production tank to be recycled after reaching the standard; the concentrated water of the 1# RO device enters a subsequent treatment unit;

(2)1# RO concentrated water and circulating sewage enter a 1# reaction tank, the 1# reaction tank is connected with a 1# double-alkali adding device, the concentrated water and the circulating sewage sequentially enter a set clarification zone after reaction and precipitation in the reaction tank, supernatant in the clarification zone enters a 1# GM device, water produced by the 1# GM device enters a water production tank, the 1# GM water enters a 2# RO desalting device after the PH of the 1# GM water is adjusted by a 1# acid adding device, the 2# RO water enters the water production tank for recycling after reaching the standard, and the concentrated water enters a concentrated water tank;

(4) nanofiltration produced water enters a GRO membrane concentration device, concentrated water of the GRO membrane concentration device is sent to an evaporation device for evaporation, crystallization and recycling, the produced water of the GRO device flows back to a No. 1 reaction tank, the concentrated water enters a DTRO device, the produced water of the DTRO flows back to the No. 1 reaction tank, the concentrated water is sent to the evaporation device for evaporation, crystallization and recycling, all the produced water of high-salt water is finally recycled, and salt in the water can be recycled.

Of course, the above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and the technical field of the present invention is equivalent to the changes and improvements made in the actual range of the present invention, which should be attributed to the patent coverage of the present invention.

Claims

1. The advanced treatment device for reclaimed water reuse is characterized in that: the domestic sewage treatment device comprises a domestic sewage inlet pipe (1) and an MBR membrane pool (2), wherein the MBR membrane pool (2) is connected with an MBR product water tank (4), the MBR product water tank (4) is connected with an UF device (5), the UF device (5) is connected with an UF product water tank (6), the UF product water tank (6) is connected with a 1# RO device (7), the 1# RO device (7) is connected with a 1# reaction tank (11), the 1# reaction tank (11) is connected with a 1# GM device (12), the 1# GM device (12) is connected with a 1# GM product water tank (13), the 1# GM product water tank (13) is connected with a 2# RO device (15), the 2# RO device (15) is connected with a reuse water tank (8), and the 1# RO device (7) is connected with the reuse water tank (8);

the 2# RO device (15) is connected with the 2# reaction tank (17), the 2# reaction tank (17) is connected with the 2# GM device (18), the 2# GM device (18) is connected with the NF device (20), the NF device (20) is connected with the NF water production tank (21), and the NF water production tank (21) is connected with the high-pressure reverse osmosis device (22);

the NF device (20) is connected with an NF concentrated water tank (26), the NF concentrated water tank (26) is connected with a DTRO device (25), and the high-pressure reverse osmosis device (22) is connected with the DTRO device (25) in parallel and then connected with the No. 1 reaction tank (11);

the high-pressure reverse osmosis device (22) is connected with the evaporative crystallization device a (23); the DTRO apparatus (25) is connected to an evaporative crystallization apparatus b (24).

2. The advanced treatment device for reclaimed water reuse according to claim 1, characterized in that: and the MBR membrane tank (2) and the MBR water producing tank (4) are provided with a delivery pump (3).

3. The advanced treatment device for reclaimed water reuse according to claim 1, characterized in that: the No. 1 reaction tank (11) is connected with a circulating sewage discharge device (10).

4. The advanced treatment device for reclaimed water reuse according to claim 1, characterized in that: the No. 1 reaction tank (11) is connected with a double-alkali device (9).

5. The advanced treatment device for reclaimed water reuse according to claim 1, characterized in that: the 1# GM water production tank (13) is connected with an acid adding and pH adjusting device (14).

6. The advanced treatment device for reclaimed water reuse according to claim 1, characterized in that: the No. 2 reaction tank (17) is connected with an alkali adding device (16).

7. The advanced treatment device for reclaimed water reuse according to claim 1, characterized in that: an acid adding device (19) is connected to a pipeline connecting the No. 2 GM device (18) and the NF device (20).