Reverse osmosis concentrated water zero discharge treatment system

Abstract

The utility model belongs to the technical field of reverse osmosis concentrated water zero-discharge treatment, and discloses a reverse osmosis concentrated water zero-discharge treatment system which combines pretreatment, ultrafiltration, ion exchange, carbon removal, reverse osmosis and evaporative crystallization. Comprising concentrated water membrane concentration pretreatment, a concentrated water ultrafiltration feed pump, an ultrafiltration self-cleaning filter, an ultrafiltration device, a concentrated water ultrafiltration water producing tank, a weak acid sodium bed feed pump, a weak acid sodium bed, a decarburization tower, a decarburization fan, a decarburization water tank, a concentrated water reverse osmosis feed pump, a concentrated water reverse osmosis cartridge filter, a concentrated water reverse osmosis high-pressure pump, a concentrated water reverse osmosis device and a concentrated water reverse osmosis concentrated water tank, and a concentrated water reverse osmosis concentrated water delivery pump and an evaporative crystallization device. According to the utility model, a combined process of pretreatment, ultrafiltration, ion exchange, carbon removal, reverse osmosis and evaporative crystallization is used as a reverse osmosis concentrated water treatment process; through the process combination of pretreatment, ultrafiltration, ion exchange, carbon removal, reverse osmosis and evaporative crystallization, zero emission of reverse osmosis concentrated water is ensured, and energy conservation and consumption reduction are realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of zero-discharge treatment of reverse osmosis concentrated water, and relates to a zero-discharge treatment system for reverse osmosis concentrated water combined with pretreatment+ultrafiltration+ion exchange+carbon removal+reverse osmosis+evaporation crystallization. Background Art

[0002] As a wastewater reuse technology, the double membrane process is widely used in the petrochemical industry. The double membrane process produces a certain amount of reverse osmosis concentrated water, the main characteristics of which are high concentration of refractory organic matter, high salt content and high hardness. For a long time, the treatment method for reverse osmosis concentrated water is to directly discharge the reverse osmosis concentrated water after multiple process treatments. In actual applications, it is found that due to high energy consumption and high operating costs, the application of a single evaporation crystallization process is limited.

[0003] Therefore, it is necessary to develop a combined process to ensure zero discharge of reverse osmosis concentrate and achieve energy saving and consumption reduction. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a pretreatment + ultrafiltration + ion exchange + carbon removal + reverse osmosis + evaporation crystallization combined process to achieve zero discharge of reverse osmosis concentrated water and achieve energy saving and consumption reduction.

[0005] The technical solution of this utility model:

[0006] A reverse osmosis concentrated water zero-discharge treatment system, which is a combination of pretreatment + ultrafiltration + ion exchange + carbon removal + reverse osmosis + evaporation crystallization, including concentrated water membrane concentration pretreatment 1, concentrated water ultrafiltration water feed pump 2, ultrafiltration self-cleaning filter 3, ultrafiltration device 4, concentrated water ultrafiltration water production pool 5, weak acid sodium bed water feed pump 6, weak acid sodium bed 7, decarbonization tower 8, decarbonization fan 9, decarbonization water pool 10, concentrated water reverse osmosis water feed pump 11, concentrated water reverse osmosis security filter 12, concentrated water reverse osmosis high-pressure pump 13, concentrated water reverse osmosis device 14, concentrated water reverse osmosis concentrated water pool 15, concentrated water reverse osmosis concentrated water delivery pump 16 and evaporation crystallization device 17;

[0007] The outlet of the concentrated water membrane concentration pretreatment 1 is connected to the concentrated water ultrafiltration water feed pump 2, and the concentrated water ultrafiltration water feed pump 2 is further connected to the water inlet of the ultrafiltration self-cleaning filter 3, and the water outlet of the ultrafiltration self-cleaning filter 3 is connected to the lower water inlet of the ultrafiltration device 4, and the upper water outlet of the ultrafiltration device 4 is connected to the upper water inlet of the concentrated water ultrafiltration water production pool 5, and the upper water outlet of the concentrated water ultrafiltration water production pool 5 is connected to the weak acid sodium bed water feed pump 6, and the weak acid sodium bed water feed pump 6 is further connected to the upper water inlet of the weak acid sodium bed 7, and the lower water outlet of the weak acid sodium bed 7 is connected to the upper water inlet of the decarbonization tower 8; the decarbonization fan 9 is connected to the lower air inlet of the decarbonization tower 8, and the upper water outlet of the decarbonization tower 8 is connected to the decarbonization water The water inlet at the upper end of the pool 10 and the water outlet at the lower end of the decarbonized water pool 10 are connected to the concentrate reverse osmosis water supply pump 11, the concentrate reverse osmosis water supply pump 11 is further connected to the water inlet of the concentrate reverse osmosis security filter 12, the water outlet of the concentrate reverse osmosis security filter 12 is connected to the concentrate reverse osmosis high-pressure pump 13, the concentrate reverse osmosis high-pressure pump 13 is further connected to the inlet of the concentrate reverse osmosis device 14, the outlet of the concentrate reverse osmosis device 14 is connected to the water inlet of the concentrate reverse osmosis concentrate pool 15, the water outlet of the concentrate reverse osmosis concentrate pool 15 is connected to the concentrate reverse osmosis concentrate water delivery pump 16, and the concentrate reverse osmosis concentrate water delivery pump 16 is further connected to the evaporation crystallization device 17.

[0008] Beneficial effects of the utility model:

[0009] (1) Using a combination of pretreatment + ultrafiltration + ion exchange + carbon removal + reverse osmosis + evaporation crystallization as a reverse osmosis concentrated water treatment process;

[0010] (2) Through the combination of pretreatment + ultrafiltration + ion exchange + carbon removal + reverse osmosis + evaporation crystallization process, zero discharge of reverse osmosis concentrated water is guaranteed, and energy saving and consumption reduction are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The utility model is a process flow diagram of a pretreatment + ultrafiltration + ion exchange + carbon removal + reverse osmosis + evaporation crystallization combined process.

[0012] In the figure: 1 concentrate membrane concentration pretreatment; 2 concentrate ultrafiltration water feed pump; 3 ultrafiltration self-cleaning filter; 4 ultrafiltration device; 5 concentrate ultrafiltration water production pool; 6 weak acid sodium bed feed pump; 7 weak acid sodium bed; 8 decarbonization tower; 9 decarbonization fan; 10 decarbonization water pool; 11 concentrate reverse osmosis water feed pump; 12 concentrate reverse osmosis safety filter, 13 concentrate reverse osmosis high-pressure pump, 14 concentrate reverse osmosis device, 15 concentrate reverse osmosis concentrate pool, 16 concentrate reverse osmosis concentrate delivery pump and 17 evaporation crystallization device. DETAILED DESCRIPTION

[0013] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings and technical solutions.

[0014] Example

[0015] A reverse osmosis concentrated water zero-discharge treatment system, which is a combination of pretreatment + ultrafiltration + ion exchange + carbon removal + reverse osmosis + evaporation crystallization, including concentrated water membrane concentration pretreatment 1, concentrated water ultrafiltration water feed pump 2, ultrafiltration self-cleaning filter 3, ultrafiltration device 4, concentrated water ultrafiltration water production pool 5, weak acid sodium bed water feed pump 6, weak acid sodium bed 7, decarbonization tower 8, decarbonization fan 9, decarbonization water pool 10, concentrated water reverse osmosis water feed pump 11, concentrated water reverse osmosis security filter 12, concentrated water reverse osmosis high-pressure pump 13, concentrated water reverse osmosis device 14, concentrated water reverse osmosis concentrated water pool 15, concentrated water reverse osmosis concentrated water delivery pump 16 and evaporation crystallization device 17;

[0016] The outlet of the concentrated water membrane concentration pretreatment 1 is connected to the concentrated water ultrafiltration water feed pump 2, and the concentrated water ultrafiltration water feed pump 2 is further connected to the water inlet of the ultrafiltration self-cleaning filter 3, and the water outlet of the ultrafiltration self-cleaning filter 3 is connected to the lower water inlet of the ultrafiltration device 4, and the upper water outlet of the ultrafiltration device 4 is connected to the upper water inlet of the concentrated water ultrafiltration water production pool 5, and the upper water outlet of the concentrated water ultrafiltration water production pool 5 is connected to the weak acid sodium bed water feed pump 6, and the weak acid sodium bed water feed pump 6 is further connected to the upper water inlet of the weak acid sodium bed 7, and the lower water outlet of the weak acid sodium bed 7 is connected to the upper water inlet of the decarbonization tower 8; the decarbonization fan 9 is connected to the lower air inlet of the decarbonization tower 8, and the upper water outlet of the decarbonization tower 8 is connected to the decarbonization water The water inlet at the upper end of the pool 10 and the water outlet at the lower end of the decarbonized water pool 10 are connected to a concentrated water reverse osmosis water feed pump 11, which is further connected to a water inlet of a concentrated water reverse osmosis security filter 12, and a water outlet of the concentrated water reverse osmosis security filter 12 is connected to a concentrated water reverse osmosis high-pressure pump 13, which is further connected to an inlet of a concentrated water reverse osmosis device 14, and an outlet of the concentrated water reverse osmosis device 14 is connected to a water inlet of a concentrated water reverse osmosis concentrated water pool 15, and a water outlet of the concentrated water reverse osmosis concentrated water pool 15 is connected to a concentrated water reverse osmosis concentrated water delivery pump 16, which is further connected to an evaporation crystallization device 17;

[0017] The effluent after the concentrated water membrane pretreatment 1 is passed through the concentrated water ultrafiltration water feed pump 2 and then passes through the ultrafiltration self-cleaning filter 3 and enters the ultrafiltration device 4. The effluent of the ultrafiltration device 4 enters the concentrated water ultrafiltration water production pool 5. The effluent of the concentrated water ultrafiltration water production pool 5 is lifted by the weak acid sodium bed water feed pump 6 and passes through the weak acid sodium bed 7 and the decarbonization tower 8 in sequence. The decarbonization fan 9 provides an air source for the decarbonization tower 8; the effluent of the decarbonization tower 8 enters the decarbonization water pool 10, and the effluent of the decarbonization pool 10 passes through the concentrated water reverse osmosis security filter 12 through the concentrated water reverse osmosis water feed pump 11, and is then lifted to the concentrated water reverse osmosis device 14 through the concentrated water reverse osmosis high-pressure pump 13. The effluent of the concentrated water reverse osmosis device 14 enters the concentrated water reverse osmosis concentrated water pool 15, and the effluent of the concentrated water reverse osmosis concentrated water pool 15 enters the evaporation crystallization device 17 through the concentrated water reverse osmosis concentrated water delivery pump 16.

[0018] like Figure 1 As shown, reverse osmosis concentrated water 630m 3 / hAfter the concentrated water membrane concentration pretreatment 1, it enters the ultrafiltration device 4, and three groups are connected in parallel. The concentrated water ultrafiltration water is lifted to the weak acid sodium bed 7 by the weak acid sodium bed feed pump 6. Four water pumps are connected in parallel. The water from the weak acid sodium bed 7 enters the decarbonization tower 8, and the decarbonization fan provides 9000m 3 / h air, the effluent from the decarbonization tower 8 is lifted to the concentrate reverse osmosis device 14 by the concentrate reverse osmosis water pump 11 and the concentrate reverse osmosis high-pressure pump 13, and the concentrate reverse osmosis concentrate is sent to the evaporation crystallization device 17 by the concentrate reverse osmosis concentrate delivery pump 16 for evaporation and crystallization to achieve zero discharge of reverse osmosis concentrate.

Claims

1. A zero-discharge treatment system for reverse osmosis concentrated water, characterized in that: The reverse osmosis concentrated water zero-discharge treatment system is a combination of pretreatment + ultrafiltration + ion exchange + carbon removal + reverse osmosis + evaporation crystallization, comprising concentrated water membrane concentration pretreatment (1), concentrated water ultrafiltration water feed pump (2), ultrafiltration self-cleaning filter (3), ultrafiltration device (4), concentrated water ultrafiltration water production pool (5), weak acid sodium bed water feed pump (6), weak acid sodium bed (7), decarbonization tower (8), decarbonization fan (9), decarbonization pool (10), concentrated water reverse osmosis water feed pump (11), concentrated water reverse osmosis safety filter (12), concentrated water reverse osmosis high-pressure pump (13), concentrated water reverse osmosis device (14), concentrated water reverse osmosis concentrated water pool (15), concentrated water reverse osmosis concentrated water delivery pump (16) and evaporation crystallization device (17); The outlet of the concentrated water membrane concentration pretreatment (1) is connected to the concentrated water ultrafiltration water feed pump (2), the concentrated water ultrafiltration water feed pump (2) is further connected to the water inlet of the ultrafiltration self-cleaning filter (3), the water outlet of the ultrafiltration self-cleaning filter (3) is connected to the lower water inlet of the ultrafiltration device (4), the upper water outlet of the ultrafiltration device (4) is connected to the upper water inlet of the concentrated water ultrafiltration water production pool (5), the upper water outlet of the concentrated water ultrafiltration water production pool (5) is connected to the weak acid sodium bed water feed pump (6), the weak acid sodium bed water feed pump (6) is further connected to the upper water inlet of the weak acid sodium bed (7), the lower water outlet of the weak acid sodium bed (7) is connected to the upper water inlet of the decarbonization tower (8); the decarbonization fan (9) is connected to the lower air inlet of the decarbonization tower (8), and the upper water outlet of the decarbonization tower (8) is connected to the decarbonization tower (8). The upper water inlet of the carbon water pool (10) and the lower water outlet of the decarbonized water pool (10) are connected to a concentrated water reverse osmosis water supply pump (11), the concentrated water reverse osmosis water supply pump (11) is further connected to the water inlet of a concentrated water reverse osmosis security filter (12), the water outlet of the concentrated water reverse osmosis security filter (12) is connected to a concentrated water reverse osmosis high-pressure pump (13), the concentrated water reverse osmosis high-pressure pump (13) is further connected to the inlet of a concentrated water reverse osmosis device (14), the outlet of the concentrated water reverse osmosis device (14) is connected to the water inlet of a concentrated water reverse osmosis concentrated water pool (15), the water outlet of the concentrated water reverse osmosis concentrated water pool (15) is connected to a concentrated water reverse osmosis concentrated water delivery pump (16), and the concentrated water reverse osmosis concentrated water delivery pump (16) is further connected to an evaporation crystallization device (17); The effluent from the concentrated water membrane concentration pretreatment (1) is fed by the concentrated water ultrafiltration water feed pump (2) and then passes through the ultrafiltration self-cleaning filter (3) and enters the ultrafiltration device (4). The effluent from the ultrafiltration device (4) enters the concentrated water ultrafiltration water production pool (5). The effluent from the concentrated water ultrafiltration water production pool (5) is lifted by the weak acid sodium bed water feed pump (6) and passes through the weak acid sodium bed (7) and the decarbonization tower (8) in sequence. The decarbonization fan (9) provides an air source for the decarbonization tower (8); the effluent from the decarbonization tower (8) enters The decarbonized water pool (10) is provided with water from the decarbonized water pool (10) and passes through a concentrated water reverse osmosis safety filter (12) through a concentrated water reverse osmosis water supply pump (11), and then is lifted to a concentrated water reverse osmosis device (14) through a concentrated water reverse osmosis high-pressure pump (13). The water from the concentrated water reverse osmosis device (14) enters a concentrated water reverse osmosis concentrated water pool (15), and the water from the concentrated water reverse osmosis concentrated water pool (15) enters an evaporation crystallization device (17) through a concentrated water reverse osmosis concentrated water delivery pump (16).

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