Reclaimed water recycling system
By adopting a three-stage treatment system and cleaning components using SWRO membrane modules, the problem of aging and deformation of DTRO membranes in high-alkalinity soda ash wastewater was solved, achieving efficient treatment and long-life reuse of wastewater.
Patent Information
- Application Number
- CN202423074564.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-12
AI Technical Summary
In existing technologies, when chemical plants treat soda ash wastewater, DTRO membranes are prone to aging and deformation, which affects the treatment effect and shortens the service life, especially in the case of soda ash wastewater with high alkalinity.
The treatment uses SWRO membrane modules, which consist of multiple parallel SWRO membrane elements forming a three-stage treatment system. It is equipped with circulation and cleaning components, monitors differential pressure to prevent concentrate backflow, and extends the membrane module life through forward and reverse cleaning.
It effectively treats soda ash wastewater, improves treatment efficiency, extends the service life of SWRO membrane modules, prevents aging and deformation, and increases flow rate and treatment efficiency.
Smart Images
Figure CN223547789U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of wastewater treatment, and in particular to a greywater reuse system. Background Technology
[0002] Soda ash, chemically known as sodium carbonate, is an important basic chemical raw material widely used in building materials, flat glass, daily-use glass, detergents, alumina, and other fields. The production of soda ash generates a large amount of wastewater, which chemical plants typically reuse as greywater to save costs.
[0003] In existing technologies, chemical plants typically use a combination of DTRO membranes and evaporation crystallization processes to treat soda ash wastewater. However, due to the high alkalinity of soda ash wastewater, DTRO membranes are prone to severe aging and deformation during use. This not only significantly affects the treatment efficiency of the DTRO membrane but also severely shortens its service life. Utility Model Content
[0004] In order to overcome the shortcomings of the prior art, this application provides a greywater reuse system with good treatment effect and long service life.
[0005] The greywater reuse system provided in this application adopts the following technical solution:
[0006] A greywater reuse system includes a first pipeline, a second pipeline, a third pipeline, and at least one SWRO membrane module. The SWRO membrane module has an inlet end, a greywater end, and a concentrate end. The first pipeline is connected to the inlet end, the second pipeline is connected to the greywater end, and the third pipeline is connected to the concentrate end.
[0007] By adopting the above technical solutions, SWRO membrane modules can effectively treat soda ash wastewater and resist the erosion of wastewater during the treatment process. They not only have good treatment effect, but are also not prone to aging and deformation, and have a long service life.
[0008] In one specific implementation scheme, the SWRO membrane module includes multiple SWRO membrane elements arranged in parallel. Each SWRO membrane element includes an inlet, a medium-water inlet, and a concentrate inlet. The multiple inlets are interconnected to form the inlet end, the multiple medium-water inlets are interconnected to form the medium-water end, and the multiple concentrate inlets are interconnected to form the concentrate end.
[0009] By adopting the above technical solution, multiple SWRO membrane elements arranged in parallel can effectively improve the wastewater treatment effect of the SWRO membrane module.
[0010] In one specific implementation scheme, the SWRO membrane module has three sets, the three sets of SWRO membrane modules include a first component, a second component and a third component arranged in sequence, the first water inlet of the first component is connected to the first pipeline, the second water inlet of the second component is connected to the first concentrate end of the first component, and the third water inlet of the third component is connected to the second concentrate end of the second component.
[0011] By adopting the above technical solution, the first, second, and third components constitute a three-stage treatment system, which further improves the wastewater treatment effect of the SWRO membrane module.
[0012] In one specific implementation scheme, a fourth pipeline connects the second water inlet to the first concentrate end, and a fifth pipeline connects the third water inlet to the second concentrate end. Circulation components are respectively installed on the fourth pipeline and the fifth pipeline.
[0013] By adopting the above technical solution, the flow rate of wastewater between the first, second, and third components is effectively increased, thereby improving the wastewater treatment efficiency.
[0014] In one specific implementation, the circulation assembly includes a circulation pump and two first butterfly valves respectively located on both sides of the circulation pump.
[0015] In one specific implementation scheme, the wastewater reuse system further includes a cleaning component, which includes multiple sixth pipelines, with the inlet and concentrate ends of each SWRO membrane module respectively connected to the sixth pipeline.
[0016] By adopting the above technical solution, the SWRO membrane module can achieve forward and reverse cleaning with the cooperation of two sixth pipelines, thereby effectively removing wastewater residue in the SWRO membrane module, improving the treatment effect of the SWRO membrane module, and extending the service life of the SWRO membrane module.
[0017] In one specific feasible implementation, a second butterfly valve is provided on each of the sixth pipelines.
[0018] In one specific implementation scheme, pressure transmitters are respectively provided at the inlet and concentrate ends of the SWRO membrane module.
[0019] By adopting the above technical solution, the pressure difference between the inlet and concentrate ends can be effectively monitored, thus preventing concentrate backflow.
[0020] In one specific feasible implementation, a third butterfly valve is provided on the first pipeline, a fourth butterfly valve and a first check valve are provided on the second pipeline, and a fifth butterfly valve and a second check valve are provided on the third pipeline.
[0021] In summary, this application includes at least one of the following beneficial technical effects:
[0022] SWRO membrane modules can effectively treat soda ash wastewater and resist its erosion during the treatment process. They not only have good treatment effect, but are also not prone to aging and deformation, and have a long service life. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of a greywater reuse system according to an embodiment of this application.
[0024] Explanation of reference numerals in the attached figures:
[0025] 1. First pipeline; 2. Second pipeline; 3. Third pipeline; 4. SWRO membrane module; 41. First module; 42. Second module; 43. Third module; 5. Fourth pipeline; 6. Fifth pipeline; 7. Circulation module; 71. Circulation pump; 72. First butterfly valve; 8. Cleaning module; 81. Sixth pipeline; 82. Second butterfly valve; 9. Pressure transmitter; 10. Third butterfly valve; 11. Fourth butterfly valve; 12. First check valve; 13. Fifth butterfly valve; 14. Second check valve; 15. Flow meter; 100. Reclaimed water tank; 101. Brine tank. Detailed Implementation
[0026] The present application will be further described in detail below with reference to the accompanying drawings.
[0027] See Figure 1 As shown, a greywater reuse system is illustrated, including a first pipeline 1, a second pipeline 2, a third pipeline 3, and three sets of SWRO membrane modules 4, each having an inlet, a greywater end, and a concentrate end.
[0028] The first pipeline 1 is connected to the wastewater source at one end and to the inlet at the other end; the second pipeline 2 extends along the arrangement direction of the three SWRO membrane modules 4 and its end in the extension direction is connected to the reclaimed water tank 100. The greywater end of the three SWRO membrane modules 4 is connected to the second pipeline 2. A flow meter 15 is also installed between the greywater end and the second pipeline 2; the third pipeline 3 extends along the arrangement direction of the three SWRO membrane modules 4 and its end in the extension direction is connected to the brine tank 101. The concentrate end of the three SWRO membrane modules 4 is connected to the third pipeline 3.
[0029] In this way, the wastewater generated after soda ash production can be fed into three sets of SWRO membrane modules 4 through the first pipeline 1. The treated wastewater then flows into the second pipeline 2 through the wastewater end and is finally transported to the reclaimed water tank 100. The concentrated wastewater generated after treatment flows into the third pipeline 3 through the concentrated wastewater end and is finally transported to the brine tank 101. The SWRO membrane modules 4 have the characteristics of high salt resistance and fouling resistance. The three sets of SWRO membrane modules 4 can form a three-stage treatment system. This three-stage treatment system effectively treats soda ash wastewater and resists the erosion of wastewater during the treatment process. It not only has good treatment effect, but is also not easy to age and deform, and has a long service life.
[0030] A third butterfly valve 10 is installed on the first pipeline 1 to control the input of wastewater and prevent excessive wastewater input from affecting the treatment effect of the SWRO membrane module 4. A fourth butterfly valve 11 and a first check valve 12 are installed at the end of the second pipeline 2. The fourth butterfly valve 11 can control the output of reclaimed water, and the first check valve 12 can prevent the reclaimed water from flowing back. A fifth butterfly valve 13 and a second check valve 14 are installed at the end of the third pipeline 3. The fifth butterfly valve 13 can control the output of concentrated water, and the second check valve 14 can prevent the concentrated water from flowing back.
[0031] In this embodiment, the SWRO membrane module 4 includes multiple SWRO membrane elements connected in parallel. Each SWRO membrane element includes an inlet, a secondary water inlet, and a concentrate inlet. The multiple inlets are interconnected to form an inlet end, the multiple secondary water inlets are interconnected to form a secondary water end, and the multiple concentrate inlets are interconnected to form a concentrate end. The multiple SWRO membrane elements connected in parallel can effectively improve the wastewater treatment effect of the SWRO membrane module 4.
[0032] In this embodiment, the three SWRO membrane modules 4 include a first module 41, a second module 42, and a third module 43 arranged sequentially. The first module 41 has six SWRO membrane elements arranged in parallel, the second module 42 has three SWRO membrane elements arranged in parallel, and the third module 43 has three SWRO membrane elements arranged in parallel. The first inlet end of the first module 41 is connected to the first pipeline 1, the second inlet end of the second module 42 is connected to the first concentrate end of the first module 41, and the third inlet end of the third module 43 is connected to the second concentrate end of the second module 42.
[0033] A fourth pipe 5 connects the second inlet end and the first concentrate end, and a fifth pipe 6 connects the third inlet end and the second concentrate end. Circulation components 7 are installed on both the fourth pipe 5 and the fifth pipe 6. Each circulation component 7 includes a circulation pump 71 and two first butterfly valves 72 located on either side of the circulation pump 71. By installing the circulation components 7, the flow rate of wastewater between the first component 41, the second component 42, and the third component 43 can be effectively increased, thereby improving the wastewater treatment efficiency.
[0034] In this embodiment, the greywater reuse system also includes a cleaning component 8, which comprises six sixth pipes 81. The inlet and concentrate ends of the three SWRO membrane modules 4 are respectively connected to the sixth pipes 81, and each sixth pipe 81 is equipped with a second butterfly valve 82. After wastewater treatment, clean water is introduced into the sixth pipe 81 at the inlet end. The clean water flows forward within the SWRO membrane module 4 and exits from the sixth pipe 81 at the concentrate end, achieving forward cleaning of the SWRO membrane module 4. Subsequently, clean water is introduced into the sixth pipe 81 at the concentrate end, and the clean water flows backward within the SWRO membrane module 4 and exits from the sixth pipe 81 at the inlet end, achieving reverse cleaning of the SWRO membrane module 4. This effectively removes wastewater residue from the SWRO membrane module 4, improves its treatment efficiency, and extends its service life.
[0035] In this embodiment, pressure transmitters 9 are respectively installed at the inlet and concentrate ends of the three SWRO membrane modules 4, which can effectively monitor the pressure difference between the inlet and concentrate ends and prevent concentrate backflow.
[0036] The implementation principle of a greywater reuse system according to an embodiment of this application is as follows:
[0037] Wastewater generated after soda ash preparation is fed into three sets of SWRO membrane modules 4 through the first pipeline 1. The treated wastewater is then fed into the second pipeline 2 through the wastewater end and finally transported to the recycled water tank 100. The concentrated water generated after treatment is fed into the third pipeline 3 through the concentrated water end and finally transported to the brine tank 101.
[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A greywater reuse system, characterized in that: It includes a first pipeline (1), a second pipeline (2), a third pipeline (3) and at least one SWRO membrane module (4), wherein the SWRO membrane module (4) has an inlet end, a secondary water end and a concentrate end, the first pipeline (1) is connected to the inlet end, the second pipeline (2) is connected to the secondary water end, and the third pipeline (3) is connected to the concentrate end.
2. The greywater reuse system according to claim 1, characterized in that: The SWRO membrane module (4) includes multiple SWRO membrane elements, which are arranged in parallel. Each SWRO membrane element includes an inlet, a medium water inlet, and a concentrate inlet. The multiple inlets are interconnected to form the inlet end, the multiple medium water inlets are interconnected to form the medium water end, and the multiple concentrate inlets are interconnected to form the concentrate end.
3. A greywater reuse system according to claim 1 or 2, characterized in that: The SWRO membrane module (4) has three sets. The three sets of SWRO membrane modules (4) include a first component (41), a second component (42) and a third component (43) arranged in sequence. The first water inlet of the first component (41) is connected to the first pipeline (1). The second water inlet of the second component (42) is connected to the first concentrate end of the first component (41). The third water inlet of the third component (43) is connected to the second concentrate end of the second component (42).
4. A greywater reuse system according to claim 3, characterized in that: A fourth pipe (5) is connected between the second water inlet and the first concentrate end, and a fifth pipe (6) is connected between the third water inlet and the second concentrate end. A circulation component (7) is provided on the fourth pipe (5) and the fifth pipe (6).
5. A greywater reuse system according to claim 4, characterized in that: The circulation assembly (7) includes a circulation pump (71) and two first butterfly valves (72) respectively located on both sides of the circulation pump (71).
6. A greywater reuse system according to claim 1 or 2, characterized in that: The wastewater reuse system also includes a cleaning component (8), which includes multiple sixth pipelines (81). The inlet and concentrate ends of each SWRO membrane module (4) are respectively connected to the sixth pipelines (81).
7. A greywater reuse system according to claim 6, characterized in that: Each of the sixth pipelines (81) is equipped with a second butterfly valve (82).
8. A greywater reuse system according to claim 1 or 2, characterized in that: The SWRO membrane module (4) is equipped with pressure transmitters (9) at the inlet and concentrate ends, respectively.
9. A greywater reuse system according to claim 1 or 2, characterized in that: The first pipeline (1) is equipped with a third butterfly valve (10), the second pipeline (2) is equipped with a fourth butterfly valve (11) and a first check valve (12), and the third pipeline (3) is equipped with a fifth butterfly valve (13) and a second check valve (14).