Sewage reuse treatment system

Abstract

The utility model belongs to the technical field of wastewater zero discharge, and relates to a sewage reuse treatment system which is a treatment system combining ultrafiltration, ion exchange, carbon removal and reverse osmosis. Comprising a self-cleaning filter, an ultrafiltration device, an ultrafiltration water producing tank, a reverse osmosis device, a reverse osmosis concentrated water tank, a concentrated water pretreatment device, a concentrated water ultrafiltration device, a concentrated water ultrafiltration water producing tank, an ion exchanger + carbon remover, a carbon removal water tank, a 1 # concentrated water reverse osmosis device, a 1 # concentrated water reverse osmosis concentrated water tank, a 2 # concentrated water reverse osmosis device, a 2 # concentrated water reverse osmosis concentrated water tank and a reverse osmosis water producing tank, a second-stage reverse osmosis device, a second-stage reverse osmosis concentrated water tank and a second-stage reverse osmosis water producing tank. And through the combined design of the reverse osmosis membrane, the water quality of recycled water is ensured, the water quantity of concentrated water is minimized, and the consumption of evaporative crystallization is reduced. And the desalting rate of the system is as high as 99%. The ultrafiltration membrane and the reverse osmosis membrane are modularized, the flexibility is high, the reliability is high, and the quality of produced water is stable and reliable. And the ion exchanger and the carbon remover reduce the scaling risk to the minimum.

Description

Technical Field

[0001] The utility model belongs to the technical field of zero discharge of wastewater, and relates to a sewage reuse treatment system of ultrafiltration + ion exchange + decarbonization + reverse osmosis. Background Technique

[0002] During the production process of the petrochemical industry, a large amount of wastewater is generated. For a long time, the treatment method for process wastewater has been to directly discharge it after treatment. With the continuous strictness of national environmental protection requirements, the reuse of treated wastewater has become the main trend, and the dual-membrane process has gradually been widely used in the petrochemical industry. A large amount of high-salt wastewater will be generated after the dual-membrane process treatment. It can be known from the "Research on the Problems and Technical Optimization of Coal Chemical Wastewater Treatment Technology" published by Wu Xian in 2016 that the treatment of high-salt wastewater mainly passes through evaporation crystallization, which has high energy consumption and high operating costs.

[0003] Therefore, it is necessary to develop a combined process to achieve the reuse of reclaimed water, increase the concentration of reverse osmosis concentrate water, reduce the consumption of evaporation crystallization, realize zero discharge of wastewater, and achieve energy conservation and consumption reduction as much as possible. Content of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a combined process of ultrafiltration + ion exchange + decarbonization + reverse osmosis to achieve the reuse of reclaimed water and energy conservation and consumption reduction.

[0005] The technical solution of the utility model:

[0006] A sewage reuse treatment system is a treatment system combined with ultrafiltration + ion exchange + decarbonization + reverse osmosis, including a self-cleaning filter 1, an ultrafiltration device 2, an ultrafiltration product water tank 3, a reverse osmosis device 4, a reverse osmosis concentrate water tank 5, concentrated water pretreatment 6, a concentrated water ultrafiltration device 7, a concentrated water ultrafiltration product water tank 8, an ion exchanger + decarbonizer 9, a decarbonization water tank 10, a No. 1 concentrated water reverse osmosis device 11, a No. 1 concentrated water reverse osmosis concentrate water tank 12, a No. 2 concentrated water reverse osmosis device 13, a No. 2 concentrated water reverse osmosis concentrate water tank 14, a reverse osmosis product water tank 15, a secondary reverse osmosis device 16, a secondary reverse osmosis concentrate water tank 17, and a secondary reverse osmosis product water tank 18;

[0007] The self-cleaning filter 1, ultrafiltration device 2, ultrafiltration product water tank 3, and reverse osmosis device 4 are connected in sequence. The reverse osmosis device 4 is respectively connected to the reverse osmosis concentrated water tank 5 and the reverse osmosis product water tank 15; the reverse osmosis concentrated water tank 5, concentrated water pretreatment 6, concentrated water ultrafiltration device 7, concentrated water ultrafiltration product water tank 8, ion exchanger + decarbonator 9, decarbonated water tank 10, and No. 1 concentrated water reverse osmosis device 11 are connected in sequence. The No. 1 concentrated water reverse osmosis device 11 is further respectively connected to the No. 1 concentrated water reverse osmosis concentrated water tank 12 and the reverse osmosis product water tank 15; the No. 1 concentrated water reverse osmosis concentrated water tank 12 is connected to the No. 2 concentrated water reverse osmosis device 13, and the No. 2 concentrated water reverse osmosis device 13 is respectively connected to the No. 2 concentrated water reverse osmosis concentrated water tank 14 and the reverse osmosis product water tank 15; the reverse osmosis product water tank 15 is connected to the secondary reverse osmosis device 16, and the secondary reverse osmosis device 16 is respectively connected to the secondary reverse osmosis concentrated water tank 17 and the secondary reverse osmosis product water tank 18. The secondary reverse osmosis concentrated water tank 17 is also connected to the concentrated water pretreatment 6;

[0008] The wastewater after biochemical pretreatment is fed into the self-cleaning filter 1. The water outlet of the self-cleaning filter 1 is connected to the lower water inlet of the ultrafiltration device 2. The upper water outlet of the ultrafiltration device 2 is connected to the upper water inlet of the ultrafiltration product water tank 3. The upper water outlet of the ultrafiltration product water tank 3 is connected to the water inlet of the reverse osmosis device 4. The water production outlet of the reverse osmosis device 4 is connected to the upper water inlet of the reverse osmosis product water tank 15. The concentrated water outlet of the reverse osmosis device 4 is connected to the upper water inlet of the reverse osmosis concentrated water tank 5. The upper water outlet of the reverse osmosis concentrated water tank 5 is connected to the water inlet of the concentrated water pretreatment 6. The water outlet of the concentrated water pretreatment 6 is connected to the water inlet of the concentrated water ultrafiltration device 7. The water outlet of the concentrated water ultrafiltration device 7 is connected to the upper water inlet of the concentrated water ultrafiltration product water tank 8. The upper water outlet of the concentrated water ultrafiltration product water tank 8 is connected to the ion exchanger + decarbonator 9. The water outlet of the ion exchanger + decarbonator 9 is connected to the upper water inlet of the decarbonated water tank 10. The lower water outlet of the decarbonated water tank 10 is connected to the water inlet of the No. 1 concentrated water reverse osmosis device 11. The water production of the No. 1 concentrated water reverse osmosis device 11 enters the reverse osmosis product water tank 15 through the upper water inlet of the reverse osmosis product water tank 15. The concentrated water of the No. 1 concentrated water reverse osmosis device 11 enters the No. 1 concentrated water reverse osmosis concentrated water tank 12 through the upper water inlet of the No. 1 concentrated water reverse osmosis concentrated water tank 12. The lower water outlet of the No. 1 concentrated water reverse osmosis concentrated water tank 12 is connected to the water inlet of the No. 2 concentrated water reverse osmosis device 13. The water outlet of the No. 2 concentrated water reverse osmosis device 13 is connected to the upper water inlet of the No. 2 concentrated water reverse osmosis concentrated water tank 14. The lower water outlet of the No. 2 concentrated water reverse osmosis concentrated water tank 14 is connected to the water inlet of the evaporation crystallization device. The lower water outlet of the reverse osmosis product water tank 15 is connected to the water inlet of the secondary reverse osmosis device 16. The concentrated water outlet of the secondary reverse osmosis device 16 is connected to the water inlet of the secondary reverse osmosis concentrated water tank 17. The water production outlet of the secondary reverse osmosis device 16 is connected to the upper water inlet of the secondary reverse osmosis product water tank 18.

[0009] The beneficial effects of the present utility model:

[0010] (1) Through the combined design of different reverse osmosis membranes, while ensuring the quality of reclaimed water, minimize the amount of concentrated water and reduce the consumption of subsequent evaporation and crystallization.

[0011] (2) The system desalination rate is as high as 99%.

[0012] (3) The ultrafiltration membrane and the reverse osmosis membrane adopt a modular design, with high flexibility and reliability, and the produced water quality is stable and reliable.

[0013] (4) The ion exchanger + decarbonator minimizes the scaling risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a process flow diagram of a combined process of ultrafiltration + ion exchange + decarbonation + reverse osmosis of the present utility model.

[0015] In the figure: 1 self-cleaning filter, 2 ultrafiltration device, 3 ultrafiltration product water tank, 4 reverse osmosis device, 5 reverse osmosis concentrated water tank, 6 concentrated water pretreatment, 7 concentrated water ultrafiltration device, 8 concentrated water ultrafiltration product water tank, 9 ion exchanger + decarbonator, 10 decarbonated water tank connection, 11 No. 1 concentrated water reverse osmosis device, 12 No. 1 concentrated water reverse osmosis concentrated water tank, 13 No. 2 concentrated water reverse osmosis device, 14 No. 2 concentrated water reverse osmosis concentrated water tank, 15 reverse osmosis product water tank, 16 secondary reverse osmosis device, 17 secondary reverse osmosis concentrated water tank, 18 secondary reverse osmosis product water tank. DETAILED DESCRIPTION OF THE INVENTION

[0016] The following further illustrates the specific implementation manners of the present utility model in combination with the drawings and technical solutions.

[0017] EXAMPLE

[0018] A sewage reuse treatment system, which is a combination of ultrafiltration + ion exchange + decarbonation + reverse osmosis, includes a self-cleaning filter 1, an ultrafiltration device 2, an ultrafiltration product water tank 3, a reverse osmosis device 4, a reverse osmosis concentrated water tank 5, a concentrated water pretreatment 6, a concentrated water ultrafiltration device 7, a concentrated water ultrafiltration product water tank 8, an ion exchanger + decarbonator 9, a decarbonated water tank 10, a No. 1 concentrated water reverse osmosis device 11, a No. 1 concentrated water reverse osmosis concentrated water tank 12, a No. 2 concentrated water reverse osmosis device 13, a No. 2 concentrated water reverse osmosis concentrated water tank 14, a reverse osmosis product water tank 15, a secondary reverse osmosis device 16, a secondary reverse osmosis concentrated water tank 17, and a secondary reverse osmosis product water tank 18;

[0019] The self-cleaning filter 1 is connected to the ultrafiltration device 2, the ultrafiltration device 2 is connected to the ultrafiltration product water tank 3, the ultrafiltration product water tank 3 is connected to the reverse osmosis device 4, the reverse osmosis device 4 is connected to the reverse osmosis concentrated water tank 5 and the reverse osmosis product water tank 15, the reverse osmosis concentrated water tank 5 is connected to the concentrated water pretreatment 6, the concentrated water pretreatment 6 is connected to the concentrated water ultrafiltration device 7, the concentrated water ultrafiltration device 7 is connected to the concentrated water ultrafiltration product water tank 8, the concentrated water ultrafiltration product water tank 8 is connected to the ion exchanger + decarbonator 9, the ion exchanger + decarbonator 9 is connected to the decarbonated water tank 10, the decarbonated water tank 10 is connected to the No. 1 concentrated water reverse osmosis device 11, the No. 1 concentrated water reverse osmosis device 11 is connected to the No. 1 concentrated water reverse osmosis concentrated water tank 12 and the reverse osmosis product water tank 15, the No. 1 concentrated water reverse osmosis concentrated water tank 12 is connected to the No. 2 concentrated water reverse osmosis device 13, the No. 2 concentrated water reverse osmosis device 13 is connected to the No. 2 concentrated water reverse osmosis concentrated water tank 14 and the reverse osmosis product water tank 15, the reverse osmosis product water tank 15 is connected to the secondary reverse osmosis device 16, and the secondary reverse osmosis device 16 is connected to the secondary reverse osmosis concentrated water tank 17 and the secondary reverse osmosis product water tank 18;

[0020] The wastewater after biochemical pretreatment is sent to the self-cleaning filter 1. The water outlet of the self-cleaning filter 1 is connected to the lower water inlet of the ultrafiltration device 2. The upper water outlet of the ultrafiltration device 2 is connected to the upper water inlet of the ultrafiltration product water tank 3. The upper water outlet of the ultrafiltration product water tank 3 is connected to the water inlet of the reverse osmosis device 4. The product water outlet of the reverse osmosis device 4 is connected to the upper water inlet of the reverse osmosis product water tank 15. The concentrated water outlet of the reverse osmosis device 4 is connected to the upper water inlet of the reverse osmosis concentrated water tank 5. The upper water outlet of the osmotic concentrated water tank 5 is connected to the water inlet of the concentrated water pretreatment 6. The water outlet of the concentrated water pretreatment 6 is connected to the water inlet of the concentrated water ultrafiltration device 7. The water outlet of the concentrated water ultrafiltration device 7 is connected to the upper water inlet of the concentrated water ultrafiltration product water tank 8. The upper water outlet of the ultrafiltration product water tank 8 is connected to the ion exchanger + decarbonator 9. The water outlet of the ion exchanger + decarbonator 9 is connected to the upper water inlet of the decarbonated water tank 10. The lower water outlet of the decarbonated water tank 10 is connected to the water inlet of the No. 1 concentrated water reverse osmosis device 11. The product water of the No. 1 concentrated water reverse osmosis device 11 enters the reverse osmosis product water tank 15 through the upper water inlet of the reverse osmosis product water tank 15. The concentrated water of the No. 1 concentrated water reverse osmosis device 11 enters the No. 1 concentrated water reverse osmosis concentrated water tank 12 through the upper water inlet of the No. 1 concentrated water reverse osmosis concentrated water tank 12. The lower water outlet of the No. 1 concentrated water reverse osmosis concentrated water tank 12 is connected to the water inlet of the No. 2 concentrated water reverse osmosis device 13. The water outlet of the No. 2 concentrated water reverse osmosis device 13 is connected to the upper water inlet of the No. 2 concentrated water reverse osmosis concentrated water tank 14. The lower water outlet of the No. 2 concentrated water reverse osmosis concentrated water tank 14 is connected to the water inlet of the evaporation crystallization device. The lower water outlet of the reverse osmosis product water tank 15 is connected to the water inlet of the secondary reverse osmosis device 16. The concentrated water outlet of the secondary reverse osmosis device 16 is connected to the water inlet of the secondary reverse osmosis concentrated water tank 17. The product water outlet of the secondary reverse osmosis device 16 is connected to the upper water inlet of the secondary reverse osmosis product water tank 18.

[0021] Such as Figure 1 , the water inflow of the ultrafiltration device 2 of an enterprise is 1800 m 3 / h. After ultrafiltration for turbidity removal and reverse osmosis for desalination, it enters the ion exchanger + decarbonator 9 for deep hardness removal and alkalinity reduction, and then enters the 1# concentrated water reverse osmosis device 11 and the 2# concentrated water reverse osmosis device 13 for further concentration to obtain the concentrated water in the 2# concentrated water reverse osmosis concentrated water tank 14, with a water volume of 90 m 3 / h, which is sent to evaporation crystallization. The water in the reverse osmosis product water tank undergoes deep desalination through secondary reverse osmosis 16 to obtain 1600 m of recycled water 3 / h, realizing sewage reuse and energy conservation and consumption reduction.

Claims

1. A sewage reuse treatment system, characterized in that, The sewage reuse treatment system is a treatment system combined with ultrafiltration + ion exchange + carbon removal + reverse osmosis, including a self-cleaning filter (1), an ultrafiltration device (2), an ultrafiltration product water tank (3), a reverse osmosis device (4), a reverse osmosis concentrated water tank (5), concentrated water pretreatment (6), a concentrated water ultrafiltration device (7), a concentrated water ultrafiltration product water tank (8), an ion exchanger + decarbonator (9), a decarbonated water tank (10), a No. 1 concentrated water reverse osmosis device (11), a No. 1 concentrated water reverse osmosis concentrated water tank (12), a No. 2 concentrated water reverse osmosis device (13), a No. 2 concentrated water reverse osmosis concentrated water tank (14), a reverse osmosis product water tank (15), a secondary reverse osmosis device (16), a secondary reverse osmosis concentrated water tank (17) and a secondary reverse osmosis product water tank (18); The self-cleaning filter (1), the ultrafiltration device (2), the ultrafiltration product water tank (3) and the reverse osmosis device (4) are connected in sequence, and the reverse osmosis device (4) is respectively connected to the reverse osmosis concentrated water tank (5) and the reverse osmosis product water tank (15); the reverse osmosis concentrated water tank (5), the concentrated water pretreatment (6), the concentrated water ultrafiltration device (7), the concentrated water ultrafiltration product water tank (8), the ion exchanger + decarbonator (9), the decarbonated water tank (10) and the No. 1 concentrated water reverse osmosis device (11) are connected in sequence, and the No. 1 concentrated water reverse osmosis device (11) is further respectively connected to the No. 1 concentrated water reverse osmosis concentrated water tank (12) and the reverse osmosis product water tank (15); the No. 1 concentrated water reverse osmosis concentrated water tank (12) is connected to the No. 2 concentrated water reverse osmosis device (13), and the No. 2 concentrated water reverse osmosis device (13) is respectively connected to the No. 2 concentrated water reverse osmosis concentrated water tank (14) and the reverse osmosis product water tank (15); the reverse osmosis product water tank (15) is connected to the secondary reverse osmosis device (16), the secondary reverse osmosis device (16) is respectively connected to the secondary reverse osmosis concentrated water tank (17) and the secondary reverse osmosis product water tank (18), and the secondary reverse osmosis concentrated water tank (17) is also connected to the concentrated water pretreatment (6).

2. The sewage reuse treatment system according to claim 1, wherein The wastewater after biochemical pretreatment is fed into the self-cleaning filter (1). The water outlet of the self-cleaning filter (1) is connected to the lower water inlet of the ultrafiltration device (2). The upper water outlet of the ultrafiltration device (2) is connected to the upper water inlet of the ultrafiltration product water tank (3). The upper water outlet of the ultrafiltration product water tank (3) is connected to the water inlet of the reverse osmosis device (4). The product water outlet of the reverse osmosis device (4) is connected to the upper water inlet above the reverse osmosis product water tank (15). The concentrated water outlet of the reverse osmosis device (4) is connected to the upper water inlet above the reverse osmosis concentrated water tank (5). The upper water outlet of the reverse osmosis concentrated water tank (5) is connected to the water inlet of the concentrated water pretreatment (6). The water outlet of the concentrated water pretreatment (6) is connected to the water inlet of the concentrated water ultrafiltration device (7). The water outlet of the concentrated water ultrafiltration device (7) is connected to the upper water inlet above the concentrated water ultrafiltration product water tank (8). The upper water outlet of the concentrated water ultrafiltration product water tank (8) is connected to the ion exchanger + decarbonator (9). The water outlet of the ion exchanger + decarbonator (9) is connected to the upper water inlet above the decarbonated water tank (10). The lower water outlet of the decarbonated water tank (10) is connected to the water inlet of the No. 1 concentrated water reverse osmosis device (11). The product water of the No. 1 concentrated water reverse osmosis device (11) enters the reverse osmosis product water tank (15) through the upper water inlet above the reverse osmosis product water tank (15). The concentrated water of the No. 1 concentrated water reverse osmosis device (11) enters the No. 1 concentrated water reverse osmosis concentrated water tank (12) through the upper water inlet above the No. 1 concentrated water reverse osmosis concentrated water tank (12). The lower water outlet of the No. 1 concentrated water reverse osmosis concentrated water tank (12) is connected to the water inlet of the No. 2 concentrated water reverse osmosis device (13). The water outlet of the No. 2 concentrated water reverse osmosis device (13) is connected to the upper water inlet above the No. 2 concentrated water reverse osmosis concentrated water tank (14). The lower water outlet of the No. 2 concentrated water reverse osmosis concentrated water tank (14) is connected to the water inlet of the evaporation crystallization device. The lower water outlet of the reverse osmosis product water tank (15) is connected to the water inlet of the secondary reverse osmosis device (16). The concentrated water outlet of the secondary reverse osmosis device (16) is connected to the water inlet of the secondary reverse osmosis concentrated water tank (17). The product water outlet of the secondary reverse osmosis device (16) is connected to the upper water inlet above the secondary reverse osmosis product water tank (18).

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