A reverse osmosis device for reclaimed water

Abstract

The utility model discloses a kind of reverse osmosis devices for reclaimed water, the device includes sewage treatment system and backwashing system, the sewage treatment system includes multiple reverse osmosis membrane components, and main water inlet pipe and main water outlet pipe are set on reverse osmosis membrane component, multiple reverse osmosis membrane components are installed in pry dress, parallel arrangement, are connected by connecting pipe between each other, and main water inlet pipe is installed in one side, main water outlet pipe is installed in other side, sewage inlet is installed on main water inlet pipe, clean water production outlet is installed on main water outlet pipe, and cleaning inlet and outlet pipeline, flushing inlet and outlet pipeline, valve are also installed on main water inlet pipe, clean and flush entire reverse osmosis module component by control valve, the utility model whole structure is simple and reasonable, stable in operation, good movability, on-site installation is convenient, application is flexible, can improve the depth of factory inspection, reduce floor area, to reduce on-site installation and debugging time and save engineering investment and operating cost.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology and relates to a reverse osmosis device for reclaimed water. Background Technology

[0002] Permeable membranes have a high capacity for retaining pollutants. They can effectively remove residual chemical oxygen demand and NH3 from water, as well as various organic matter and particulate matter, without causing pollution. They are widely used in the field of industrial wastewater treatment.

[0003] Currently, highly integrated reverse osmosis membrane devices used for wastewater treatment in the industry have low integration levels and high material consumption. This results in a significant workload for installation and commissioning at construction sites, and requires a considerable amount of space.

[0004] Therefore, there is an urgent need to improve the existing highly integrated reverse osmosis membrane devices used for wastewater treatment in order to reduce the problems of large footprint and heavy construction workload.

[0005] Therefore, a reverse osmosis device for reclaimed water is designed to overcome the above problems. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a reverse osmosis device for reclaimed water that is simple and reasonable in structure, stable in operation, highly mobile, easy to install on site, flexible in application, improves the depth of factory inspection, reduces the floor space, reduces on-site installation and commissioning time, and saves engineering investment and operating costs.

[0007] This utility model is achieved through the following technical solution: a reverse osmosis device for reclaimed water, the device including a wastewater treatment system and a backwashing system, the wastewater treatment system including multiple reverse osmosis membrane modules, and a main inlet pipe and a main outlet pipe installed on the reverse osmosis membrane modules, the multiple reverse osmosis membrane modules are installed in a skid, arranged side by side, and connected to each other by connecting pipes, with a main inlet pipe installed on one side and a main outlet pipe installed on the other side, a wastewater inlet installed on the main inlet pipe, a clean water production outlet installed on the main outlet pipe, and cleaning inlet and outlet pipes, flushing inlet and outlet pipes, and valves installed on the main inlet pipe, the entire reverse osmosis membrane module is cleaned and flushed by controlling the valves.

[0008] Preferably, the reverse osmosis membrane module consists of two sets: a first-stage water purification group and a second-stage water purification group. The two inlet sections are arranged side by side, one above the other. One side of the first-stage water purification group is connected to the main inlet pipe, and the other side has two pipes. The first return pipe is connected to the main inlet pipe and then connects to the inlet of the second-stage water purification group from the other side of the main inlet pipe through the second return pipe. The first and second return pipes are equipped with a first valve on the main pipe. Both the first-stage and second-stage water purification groups have outlet branches. One end of the outlet branch is connected to the purification area inside the first-stage and second-stage water purification groups, and the other end is connected to the main outlet pipe. A sewage pipe is provided above the second-stage water purification group. One end of the sewage pipe is connected to the sewage area above the second-stage water purification group, and the other end is connected to the concentrate return pipe on the main pipe, so that the concentrate flows back to the concentrate tank for collection and retreatment.

[0009] Preferably, the two sets of reverse osmosis membrane modules are arranged in a ratio of 10:17 between the top and bottom. The top row has 5 modules in each row and they are connected to each other via a serial port. The bottom row has 5 modules in a ratio of 5:5:5:2 and they are also connected to each other via a serial port. The top 10 modules form two sections of purified water, and the bottom 17 modules form one section of purified water.

[0010] As a preferred embodiment: a cleaning return pipe is provided on the main pipe of the first return pipe and the concentrated water return pipe, a cleaning inlet pipe is provided on the main pipe on the right side of the second return pipe, a second valve is provided on the main pipe on the right side of the cleaning return pipe, and a third valve is provided on the main pipe on the left side of the cleaning inlet pipe. The entire first-stage water purification group and the second-stage water purification group can be cleaned by controlling the valves.

[0011] Preferably, a flushing pipe is provided between the cleaning inlet pipe and the sewage pipe, and a concentrated water flushing outlet pipe is provided on the left side of the concentrated water return pipe. A fourth valve is provided between the concentrated water flushing outlet pipe and the concentrated water return pipe to control the flow direction of the concentrated water. A fifth valve is also provided between the cleaning return pipe and the flushing pipe.

[0012] As a preferred embodiment, the main water outlet pipe is also equipped with a substandard water production pipe, a flushing water supply pipe, and a cleaning water supply pipe.

[0013] Preferably, the skid is also equipped with a control cabinet for controlling the switching of valves.

[0014] Preferably, the skid is made of stainless steel and all welds are treated with pickling and passivation.

[0015] The beneficial effects of this utility model are as follows: The reverse osmosis device for reclaimed water designed in this utility model improves the integration of the highly integrated reverse osmosis membrane device for wastewater treatment by setting the sewage treatment pipeline and cleaning pipeline on the skid and connecting all membrane housings with serial ports, thereby reducing the footprint, reducing on-site installation and commissioning time, and saving engineering investment and operating costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model (front view); Figure 2 This is a schematic diagram of the overall structure of this utility model (rear view). Detailed Implementation

[0017] To enable those skilled in the art to more clearly understand the purpose, technical solution and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "horizontal", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] The present invention will now be described in detail with reference to the accompanying drawings: Figure 1-2 As shown, a reverse osmosis device for reclaimed water includes a wastewater treatment system and a backwashing system. The wastewater treatment system includes multiple reverse osmosis membrane modules 2, and a main inlet pipe 26 and a main outlet pipe 12 installed on the reverse osmosis membrane modules 2. The multiple reverse osmosis membrane modules 2 are installed in a skid 1, arranged side by side, and connected to each other by connecting pipes. The main inlet pipe 26 is installed on one side, and the main outlet pipe 12 is installed on the other side. A wastewater inlet 3 is installed on the main inlet pipe 26, and a clean water production outlet 8 is installed on the main outlet pipe 12. Cleaning inlet and outlet pipes, flushing inlet and outlet pipes, and valves are also installed on the main inlet pipe 26. The entire reverse osmosis membrane module 2 is cleaned and flushed by controlling the valves.

[0020] The reverse osmosis membrane module 2 consists of two sets: a first-stage water purification group 13 and a second-stage water purification group 14. The two inlet sections are arranged side-by-side, one above the other. One side of the first-stage water purification group 13 is connected to the main inlet pipe 26, and the other side has two pipes. The first return pipe 20 is connected to the main inlet pipe 26, and then from the other side of the main inlet pipe 26, it is connected to the inlet of the second-stage water purification group 14 via the second return pipe 16. The first return pipe 20 and the second return pipe 16 are equipped with a first valve 17 on the main pipe. Both the first-stage water purification group 13 and the second-stage water purification group 14 are provided with water outlet branch lines 18. One end of the water outlet branch line 18 is connected to the water purification area (not shown in the figure) inside the first-stage water purification group 13 and the second-stage water purification group 14, and the other end is connected to the main water outlet pipe 12. A sewage pipe 19 is provided above the second-stage water purification group 14. One end of the sewage pipe 19 is connected to the sewage area above the second-stage water purification group 14, and the other end is connected to the concentrated water return pipe 15 on the main pipeline, so that the concentrated water flows back to the concentrated water tank for collection and reprocessing.

[0021] The two sets of reverse osmosis membrane modules are arranged in a ratio of 10:17 for the top and bottom. There are 5 modules in each row at the top, and they are connected to each other via a serial port. The modules at the bottom are arranged in a ratio of 5:5:5:2, and they are also connected to each other via a serial port. The 10 modules at the top form two sections of purified water, and the 17 modules at the bottom form one section of purified water.

[0022] A cleaning return pipe 6 is provided on the main pipe of the first return pipe 20 and the concentrated water return pipe 15. A cleaning inlet pipe 5 is provided on the main pipe on the right side of the second return pipe 16. A second valve 21 is provided on the main pipe on the right side of the cleaning return pipe 6. A third valve 22 is provided on the main pipe on the left side of the cleaning inlet pipe 5. The entire first-stage water purification group 13 and the second-stage water purification group 14 are cleaned by controlling the valves.

[0023] A flushing pipe 4 is also provided between the cleaning inlet pipe 5 and the sewage pipe 19. A concentrated water flushing outlet pipe 25 is provided on the left side of the concentrated water return pipe 15. A fourth valve 23 is provided between the concentrated water flushing outlet pipe 25 and the concentrated water return pipe 15. The flow direction of the concentrated water is controlled by the valve. A fifth valve 24 is also provided between the cleaning return pipe 6 and the flushing pipe 4.

[0024] The main outlet pipe 12 is also equipped with a defective water production pipe 11, a flushing water supply pipe 9, and a cleaning water supply pipe 10. A control cabinet 7 is also installed on the skid 1 for controlling valve switching. The skid 1 is made of stainless steel, and all weld seams are treated with pickling and passivation.

[0025] The reverse osmosis device for reclaimed water designed in this utility model improves the integration of the highly integrated reverse osmosis membrane device for wastewater treatment by setting the sewage treatment pipeline and cleaning pipeline on the skid and connecting all membrane housings with serial ports, thereby reducing the footprint, reducing on-site installation and commissioning time, and saving engineering investment and operating costs.

[0026] In this invention, the valves on each pipeline can be selected as electric or manual valves according to the actual situation, and the valves on the pipeline can be easily controlled through the design of the control cabinet. Example

[0027] This embodiment provides a reverse osmosis device for reclaimed water, including a skid 1 and reverse osmosis membrane modules 2. Several reverse osmosis membrane modules 2 are arranged side-by-side within the skid 1; for example, this embodiment includes 27 reverse osmosis membrane modules 2. Each reverse osmosis membrane module contains a reverse osmosis membrane housing and 6 reverse osmosis membranes. These 27 reverse osmosis membrane modules are divided into two sections in a 17:10 ratio. The reverse osmosis membrane modules in each section are connected via an upper and lower serial port, and the concentrate from the first section serves as the wastewater feed water for the second section to improve the water recovery rate.

[0028] In practice, the number of membrane modules can be selected according to the volume of water to be treated. The reverse osmosis membrane module is a built-in pressure column type reverse osmosis membrane module. The pressure column type reverse osmosis membrane can efficiently remove particulate matter and pathogenic microorganisms from the water. The material is modified PVDF with reinforcing ribs. This membrane can effectively reduce organic and inorganic fouling in the ultrafiltration system and ensure the stable operation of the system. The bottom of the skid 1 is equipped with a non-conforming product water outlet and a concentrate outlet, and the outlet is equipped with a drain electric valve. Each reverse osmosis skid 1 has a wastewater inlet 3 and a clear water product water outlet 8 on the front. The other end of the wastewater inlet 3 is connected to the bottom row of reverse osmosis membrane modules of a section, and the other end of the clear water product water outlet 8 is connected to the product water branch of each reverse osmosis membrane in the skid 1. Each reverse osmosis skid 1 has a cleaning inlet / outlet pipe 5 and a cleaning return pipe 6 on its front side. The other end of the cleaning inlet / outlet pipe is connected to the main inlet water pipe. The other end of the cleaning inlet / outlet pipe 5 is separated from the main inlet water pipe by a valve. The other end of the cleaning return pipe 6 is connected to the second-stage concentrate pipe. The other end of the cleaning return pipe 6 is separated from the second-stage concentrate pipe by a valve. When the reverse osmosis membrane is clogged, chemical cleaning is performed on the surface of the reverse osmosis membrane.

[0029] Each reverse osmosis skid 1 has a flushing inlet / outlet pipe 4 and a concentrated flushing outlet pipe 25 on its front side. The other end of the flushing inlet 4 is connected to the main inlet pipe 26. The other end of the flushing inlet 4 is separated from the main inlet pipe 26 by an electric butterfly valve. The other end of the concentrated flushing outlet pipe 25 is connected to the concentrated water pipe of the second-stage water purification unit. They are also separated by a valve (manual butterfly valve). When the reverse osmosis membrane of the entire reverse osmosis unit is flushed, the wastewater generated by flushing is discharged through the concentrated flushing outlet pipe 25.

[0030] Each reverse osmosis skid 1 has a flushing water inlet 9 and a cleaning water inlet 10 on its front side, and both are connected to the main outlet pipe 12. The other end of the flushing water inlet 9 is separated from the main outlet pipe 12 by a valve (manual butterfly valve), and the other end of the cleaning water inlet 10 is separated from the main outlet pipe 12 by a valve (manual butterfly valve).

[0031] When treating wastewater, the valve on the inlet pipe is opened, and the butterfly valve between the flushing inlet pipe and the main inlet pipe 26, as well as the valve between the cleaning inlet pipe 5 and the main inlet pipe 26, are closed. Then the wastewater enters the first-stage reverse osmosis membrane filter for filtration. The concentrate outlet of the first-stage reverse osmosis membrane is connected to the inlet of the second-stage reverse osmosis membrane filter through a stainless steel pipeline. In this way, the concentrate from the first-stage reverse osmosis membrane filter enters the second-stage reverse osmosis membrane filter for further filtration.

[0032] When cleaning the reverse osmosis membrane, close the butterfly valve between the flushing inlet pipe 5 and the main inlet pipe 26, the valve connecting the cleaning inlet pipe to the second stage, and the valve on the main inlet pipe 26. Open the valves on the cleaning inlet pipe 5 and the inlet pipe, and the cleaning solution will enter the reverse osmosis membrane filter of the first stage to clean the membrane surface. When cleaning the membrane surface in the reverse osmosis membrane filter of the second stage water purification group is required, close the valves on the cleaning inlet pipe 5 and the inlet pipe, as well as the valves between the first and second stage water purification groups. Open the manual valve connecting the cleaning inlet pipe to the second stage water purification group, and the cleaning solution will enter the reverse osmosis membrane filter of the second stage water purification group to clean the reverse osmosis membrane surface. All the cleaning solution will flow back to the cleaning water tank outside the unit through the cleaning return pipe.

[0033] When flushing the reverse osmosis membrane, the valves on the inlet pipe and the valves on the main inlet pipe 26 are closed. The valves between the flushing inlet pipe 5 and the main inlet pipe 26, as well as the valves connecting the concentrate flushing outlet pipe 25 and the concentrate return pipe 15, are opened. This starts the flushing of the entire reverse osmosis membrane filter. The wastewater from the flushing is discharged through the concentrate flushing outlet pipe 25.

[0034] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A reverse osmosis device for reclaimed water, the device comprising a wastewater treatment system and a backwashing system, characterized in that: The wastewater treatment system includes multiple reverse osmosis membrane modules, as well as main inlet and main outlet pipes installed on the reverse osmosis membrane modules. The multiple reverse osmosis membrane modules are installed in a skid-mounted unit, arranged side by side, and connected to each other by connecting pipes. The main inlet pipe is installed on one side, and the main outlet pipe is installed on the other side. The main inlet pipe is equipped with a wastewater inlet, and the main outlet pipe is equipped with a clean water production outlet. The main inlet pipe is also equipped with cleaning inlet and outlet pipes, flushing inlet and outlet pipes, and valves. The entire reverse osmosis membrane module is cleaned and flushed by controlling the valves.

2. The reverse osmosis device for reclaimed water according to claim 1, characterized in that: The reverse osmosis membrane module consists of two sets: a first-stage water purification group and a second-stage water purification group. The two inlet sections are arranged side by side, one above the other. One side of the first-stage water purification group is connected to the main inlet pipe, and the other side has two pipes. The first return pipe is connected to the main inlet pipe and then connects to the inlet of the second-stage water purification group from the other side of the main inlet pipe through the second return pipe. The first and second return pipes are equipped with a first valve on the main pipe. Both the first-stage and second-stage water purification groups have outlet branches. One end of the outlet branch is connected to the purification area inside the first-stage and second-stage water purification groups, and the other end is connected to the main outlet pipe. A sewage pipe is installed above the second-stage water purification group. One end of the sewage pipe is connected to the sewage area above the second-stage water purification group, and the other end is connected to the concentrate return pipe on the main pipe, so that the concentrate flows back to the concentrate tank for collection and retreatment.

3. The reverse osmosis device for reclaimed water according to claim 2, characterized in that: The two sets of reverse osmosis membrane modules are arranged in a ratio of 10:17 for the top and bottom. There are 5 modules in each row at the top, and they are connected to each other via a serial port. The modules at the bottom are arranged in a ratio of 5:5:5:2, and they are also connected to each other via a serial port. The 10 modules at the top form two sections of purified water, and the 17 modules at the bottom form one section of purified water.

4. The reverse osmosis device for reclaimed water according to claim 2, characterized in that: A cleaning return pipe is provided on the main pipe of the first return pipe and the concentrated water return pipe, a cleaning inlet pipe is provided on the main pipe on the right side of the second return pipe, a second valve is provided on the main pipe on the right side of the cleaning return pipe, and a third valve is provided on the main pipe on the left side of the cleaning inlet pipe. The entire first-stage water purification group and the second-stage water purification group are cleaned by controlling the valves.

5. The reverse osmosis device for reclaimed water according to claim 4, characterized in that: A flushing pipe is also provided between the cleaning inlet pipe and the sewage pipe. A concentrated water flushing outlet pipe is provided on the left side of the concentrated water return pipe. A fourth valve is provided between the concentrated water flushing outlet pipe and the concentrated water return pipe to control the flow direction of the concentrated water. A fifth valve is also provided between the cleaning return pipe and the flushing pipe.

6. The reverse osmosis device for reclaimed water according to claim 2, characterized in that: The main water outlet pipe is also equipped with a substandard water production pipe, a flushing water supply pipe, and a cleaning water supply pipe.

7. The reverse osmosis device for reclaimed water according to claim 1, characterized in that: The skid is also equipped with a control cabinet for controlling the switching of valves.

8. The reverse osmosis device for reclaimed water according to claim 1 or 7, characterized in that: The skid is made of stainless steel, and all welds are treated with pickling and passivation.

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