Ceramic membrane concentrated water circulating device

Abstract

The utility model discloses a ceramic membrane concentrated water circulating device, which relates to the technical field of water treatment and comprises a ceramic membrane component. A concentrated water pipeline and a water producing pipeline are arranged at the other end of the ceramic membrane assembly; the system further comprises a circulating pipeline; the circulating pipeline is connected between the concentrated water pipeline and the water inlet pipeline, a circulating pump is mounted on the circulating pipeline, and the circulating pump is used for pumping water discharged into the concentrated water pipeline back to the water inlet pipeline; the starting power of the circulating pump is used for controlling the circulating flow speed of the concentrated water end to be in a range of 0.1-1.0 m / s. The circulating pump is arranged at the concentrated water end of the ceramic membrane component, the water treatment performance of the ceramic membrane is optimized by controlling the flow speed of the concentrated water end at the circulating flow speed of 0.1-1.0 m / s, the flow speed on the surface of the membrane is controlled within a reasonable range, the energy consumption is reduced, pollutant deposition is prevented, the anti-pollution capacity of the ceramic membrane is greatly improved, and the service life of the ceramic membrane component is prolonged. The application range of the ceramic membrane in the field of water treatment is widened.

Description

TECHNICAL FIELD

[0001] The utility model relates to water treatment technical field more specifically, it relates to a kind of ceramic membrane concentrated water circulating device, it is applicable to industrial wastewater treatment, drinking water purification, seawater desalination, brine, mine water and other fields. BACKGROUND

[0002] At present, the conventional ceramic membrane device at home and abroad mainly adopts large cross-flow mode operation, and the circulating pump is arranged at the water inlet end of the ceramic membrane, as shown in the drawing. Figure 1 The circulating flow rate is usually designed to be between 1-7m / s, for example, the ceramic membrane equipment of Pall Corporation adopts such design. In recent years, some companies in the United States and Japan have launched ceramic membrane equipment with micro-cross-flow operation mode, and the water inlet flow rate is designed to be about 0.1m / s, and the flow rate at the concentrated water end is about 0.01m / s. However, the large cross-flow mode has high energy consumption, and although the micro-cross-flow mode has low energy consumption, it has strict requirements on the suspended solids in the water inlet, which is usually below 20mg / L. Especially when treating high-concentration wastewater, due to the slow water flow rate, the suspended solids on the membrane are easy to accumulate, which causes serious membrane pollution and rapid flux decline.

[0003] Therefore, there is an urgent need for a ceramic membrane concentrated water circulating device that can control the flow rate at the concentrated water end of the ceramic membrane within a reasonable range, to balance the energy consumption and treatment efficiency, reduce the operating energy consumption, and reduce the membrane pollution and prolong the service life of the membrane. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the utility model provides a kind of ceramic membrane concentrated water circulating device, to solve the above technical problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A ceramic membrane concentrated water circulating device, comprising: a ceramic membrane assembly; the ceramic membrane assembly has a water inlet pipeline at one end and a concentrated water pipeline and a water production pipeline at the other end; further comprising: a circulating pipeline;

[0007] The circulating pipeline is connected between the concentrated water pipeline and the water inlet pipeline, a circulating pump is installed on the circulating pipeline, and the circulating pump is used to pump the water discharged into the concentrated water pipeline back to the water inlet pipeline; the opening power of the circulating pump controls the circulating flow rate at the concentrated water end to be within the range of 0.1-1.0m / s.

[0008] The utility model discloses a circulating pump is provided in the concentrated water end of ceramic membrane assembly, and the flow rate of concentrated water end is controlled at 0.1-1.0 m / s circulating flow rate, and the water treatment performance of ceramic membrane is optimized, the flow rate of membrane surface is controlled in reasonable range, and the energy consumption is reduced while preventing the deposition of pollutants, and the suspended solids of inlet water is improved from 20 mg / L to 2000 mg / L above when the micro-cross flow, the anti-pollution ability of ceramic membrane is greatly improved, and the application range of ceramic membrane in the water treatment field is widened.

[0009] Preferably, in the above-mentioned ceramic membrane concentrated water circulating device, a water inlet pump and a first automatic valve are installed on the water inlet pipeline, the first automatic valve is close to the ceramic membrane assembly, and an interface between the circulating pipeline and the water inlet pipeline is located between the first automatic valve and the ceramic membrane assembly.

[0010] Preferably, in the above-mentioned ceramic membrane concentrated water circulating device, a second automatic valve and a first flow sensor are installed on the water production pipeline, and the second automatic valve is close to the ceramic membrane assembly.

[0011] Preferably, in the above-mentioned ceramic membrane concentrated water circulating device, a stop valve and a second flow sensor are installed on the concentrated water pipeline, the second flow sensor is close to the ceramic membrane assembly, and an interface between the circulating pipeline and the concentrated water pipeline is located between the stop valve and the ceramic membrane assembly.

[0012] Preferably, in the above-mentioned ceramic membrane concentrated water circulating device, a third automatic valve and a third flow sensor are further installed on the circulating pipeline, the third automatic valve is close to the concentrated water pipeline, and the third flow sensor is located between the third automatic valve and the circulating pump or between the circulating pump and the water inlet pipeline.

[0013] Preferably, in the above-mentioned ceramic membrane concentrated water circulating device, a pressure sensor is further arranged on the pipeline.

[0014] Preferably, in the above-mentioned ceramic membrane concentrated water circulating device, a control system is further arranged, and the control system is used for controlling the flow adjustment according to the flow and pressure detected by the flow sensors and the pressure sensor.

[0015] Preferably, in the above-mentioned ceramic membrane concentrated water circulating device, the ceramic membrane aperture of the ceramic membrane assembly ranges from 0.01 to 1 microns.

[0016] According to the above technical scheme, compared with the prior art, the utility model discloses a ceramic membrane concentrated water circulating device, which has the following beneficial effects:

[0017] 1. Reduced Energy Consumption: Compared to the large cross-flow method, the circulation velocity of this invention is lower, significantly reducing energy consumption. Placing the circulation pump on the concentrate side significantly reduces pump power and energy consumption, thereby lowering equipment costs and operating energy consumption.

[0018] 2. Improved treatment efficiency: By optimizing the circulation flow rate and concentrate recirculation, the treatment efficiency of the ceramic membrane is improved, making it especially suitable for the treatment of high-concentration wastewater.

[0019] 3. Reduced membrane fouling: Regular cleaning and optimized operating parameters reduce membrane fouling and extend the service life of ceramic membranes.

[0020] 4. Wide range of applications: This invention is applicable to a variety of water quality conditions, including industrial wastewater, drinking water, seawater, brine and mine water. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 The attached diagram is a schematic diagram of an existing ceramic membrane device operating in a large crossflow mode;

[0023] Figure 2 The attached figure is a schematic diagram of the first ceramic membrane concentrate circulation device provided by this utility model;

[0024] Figure 3 The attached figure is a schematic diagram of the second type of ceramic membrane concentrate circulation device provided by this utility model.

[0025] in:

[0026] 1-Ceramic membrane module;

[0027] 2-Inlet water pipe;

[0028] 21-Inlet pump; 22-First automatic valve;

[0029] 3-Concentrate piping;

[0030] 31-Stop valve; 32-Second flow sensor;

[0031] 4-Product water pipeline;

[0032] 41-Second automatic valve; 42-First flow sensor;

[0033] 5-Circulation piping;

[0034] 51-Circulation pump; 52-Third automatic valve; 53-Third flow sensor. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] See appendix Figure 2 This utility model discloses a ceramic membrane concentrate circulation device, including: a ceramic membrane assembly 1; one end of the ceramic membrane assembly 1 has an inlet pipe 2, and the other end has a concentrate pipe 3 and a product water pipe 4; it also includes: a circulation pipe 5;

[0037] The circulation pipeline 5 is connected between the concentrate pipeline 3 and the inlet pipeline 2. A circulation pump 51 is installed on the circulation pipeline 5. The circulation pump 51 is used to pump the water discharged into the concentrate pipeline 3 back to the inlet pipeline 2. The starting power of the circulation pump 51 controls the circulation flow rate at the concentrate end within the range of 0.1-1.0m / s.

[0038] This invention adjusts the rotation speed of the circulation pump 51 according to the influent water quality, such as suspended solids concentration and viscosity, so that the circulation flow rate at the concentrate end is maintained between 0.1-1.0 m / s, thereby slowing down the fouling rate of the ceramic membrane.

[0039] By recirculating concentrated wastewater, a portion of the concentrated wastewater is returned to the inlet, reducing wastewater discharge and improving treatment efficiency.

[0040] To further optimize the above technical solution, an inlet pump 21 and a first automatic valve 22 are installed on the inlet pipe 2. In this embodiment, the first automatic valve 22 can be pneumatic or electric, or it can be a regulating valve or a switching valve. The first automatic valve 22 is close to the ceramic membrane assembly 1, and the interface between the circulation pipe 5 and the inlet pipe 2 is located between the first automatic valve 22 and the ceramic membrane assembly 1.

[0041] To further optimize the above technical solution, a second automatic valve 41 and a first flow sensor 42 are installed on the water production pipeline 4. The second automatic valve 41 can be pneumatic or electric, or it can be a regulating valve or a switching valve. The second automatic valve 41 is close to the ceramic membrane assembly 1.

[0042] To further optimize the above technical solution, a shut-off valve 31 and a second flow sensor 32 are installed on the concentrate pipeline 3. The second flow sensor 32 is close to the ceramic membrane assembly 1, and the interface between the circulation pipeline 5 and the concentrate pipeline 3 is located between the shut-off valve 31 and the ceramic membrane assembly 1.

[0043] To further optimize the above technical solution, a third automatic valve 52 and a third flow sensor 53 are also installed on the circulation pipeline 5. The third automatic valve 52 can be pneumatic or electric, or it can be a regulating valve or a switching valve. The third automatic valve 52 is close to the concentrate pipeline 3, and the third flow sensor 53 is located between the third automatic valve 52 and the circulation pump 51.

[0044] To further optimize the above technical solution, a pressure sensor installed on the pipeline is also included.

[0045] To further optimize the above technical solution, a control system is also included, which is used to control the flow rate adjustment based on the flow rate and pressure detected by each flow sensor and the pressure sensor.

[0046] In this embodiment, a ceramic membrane material with high pollution resistance and high flux is used, and the ceramic membrane pore size of the ceramic membrane module 1 is in the range of 0.01-1 micrometer.

[0047] In this embodiment, in order to control membrane fouling, a combination of chemical cleaning and physical cleaning, such as backwashing, is used regularly with acid and alkali cleaning agents to reduce membrane fouling and extend membrane life.

[0048] When performing chemical cleaning, turning on the circulation pump 51 can make the cleaning solution mix more evenly and the cleaning effect more thorough.

[0049] This invention extends the interval of chemical cleaning by more than 10 times, and reduces cleaning agents and environmental pollution by more than 90%.

[0050] See appendix Figure 3 This is another form of ceramic membrane concentrate circulation device, mainly differing in that the position of the inlet pipe 2 is changed to an upper inlet and the outlet pipe 3 is changed to a lower outlet for concentrate discharge, resulting in a change in layout. The third flow sensor 53 has also been repositioned, located between the outlet of the circulation pump 51 and the inlet pipe 2. Other specific features remain the same as described above.

[0051] Example 1:

[0052] This embodiment focuses on the treatment of industrial wastewater:

[0053] Device configuration: A ceramic membrane with a pore size of 0.05 micrometers is used, and the circulation pump 51 is set to a circulation flow rate of 0.5 m / s.

[0054] Operation process: Industrial wastewater is introduced into the device and sent to the ceramic membrane module 1 by the circulating pump 51. The concentrated water is returned to the inlet end, and the clean water is discharged through the membrane pores.

[0055] Cleaning method: backwash once every 1 hour of operation, and chemical cleaning once every 15 days of operation.

[0056] Results: The treated wastewater has a suspended solids removal rate of >99.9%, and energy consumption is reduced by more than 78% compared to the traditional cross-flow method.

[0057] Example 2:

[0058] This embodiment focuses on the treatment of drinking water:

[0059] Device configuration: A ceramic membrane with a pore size of 0.03 micrometers is used, and the circulation pump 51 is set to a circulation flow rate of 0.1 m / s.

[0060] Operation process: Raw water is introduced into the device, filtered through a ceramic membrane to obtain clean drinking water, and the concentrated water is returned to the inlet.

[0061] Cleaning method: Backwash once every 40 minutes of operation, and chemical cleaning once every 30 days of operation.

[0062] Results: The treated drinking water meets national drinking water standards, and the cleaning cycle is extended by more than 10 times.

[0063] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0064] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A ceramic membrane concentrated water recycling apparatus comprising: Ceramic membrane module (1); the ceramic membrane module (1) has water inlet pipeline (2) at one end, the other end has concentrated water pipeline (3) and water production pipeline (4); characterized in that, further comprising: circulation pipeline (5); The circulation pipeline (5) is connected between the concentrated water pipeline (3) and the water inlet pipeline (2), and the circulation pump (51) is installed on the circulation pipeline (5), the circulation pump (51) is used for pumping the water in the concentrated water pipeline (3) back to the water inlet pipeline (2); the opening power of the circulation pump (51) controls the circulation flow rate of the concentrated water end in the range of 0.1-1.0 m / s.

2. The ceramic membrane concentrated water recycling device according to claim 1, wherein The water inlet pipeline (2) is provided with a water inlet pump (21) and a first automatic valve (22), the first automatic valve (22) is close to the ceramic membrane module (1), and the interface between the circulation pipeline (5) and the water inlet pipeline (2) is located between the first automatic valve (22) and the ceramic membrane module (1).

3. The ceramic membrane concentrated water circulating device according to claim 2, wherein The water production pipeline (4) is provided with a second automatic valve (41) and a first flow sensor (42), and the second automatic valve (41) is close to the ceramic membrane module (1).

4. The ceramic membrane concentrated water circulating device according to claim 3, wherein The concentrated water pipeline (3) is provided with a stop valve (31) and a second flow sensor (32), the second flow sensor (32) is close to the ceramic membrane module (1), and the interface between the circulation pipeline (5) and the concentrated water pipeline (3) is located between the stop valve (31) and the ceramic membrane module (1).

5. The ceramic membrane concentrated water recycling device according to claim 4, wherein The circulation pipeline (5) is further provided with a third automatic valve (52) and a third flow sensor (53), the third automatic valve (52) is close to the concentrated water pipeline (3), and the third flow sensor (53) is located between the third automatic valve (52) and the circulation pump (51), or between the circulation pump (51) and the water inlet pipeline (2).

6. The ceramic membrane concentrated water recycling device according to claim 5, wherein Further comprising a pressure sensor provided on the pipeline.

7. The ceramic membrane concentrated water recycling device according to claim 6, wherein Further comprising a control system, the control system is used for controlling the flow adjustment according to the flow and pressure detected by each flow sensor and the pressure sensor.

8. The ceramic membrane concentrated water recycling device according to claim 1, wherein The ceramic membrane aperture of the ceramic membrane module (1) ranges from 0.01 to 1 microns.

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