A tank-type ceramic membrane filtration equipment

Abstract

The present invention discloses a tank-type ceramic membrane filtration device, comprising a tank body, a water inlet pipe, a vent pipe, a multifunctional pipe, a water inlet distribution pipe, a separation wing plate, a ceramic membrane assembly, a ceramic membrane assembly water production pipe, an air flushing pipe, an upper drainage pipe, and a water production pipe. The structural design of the present invention can meet different operational needs, and can adopt a pressure filtration mode or an immersion suction filtration mode; can adopt a cross-flow filtration mode or a dead-end filtration mode; can adopt a ceramic membrane assembly direct filtration mode, ozone oxidation or a series mode of powdered activated carbon circulation pretreatment and ceramic membrane filtration; can adopt a conventional air-water flushing mode or a gas pressure explosion washing mode. Compared with conventional ceramic membrane filtration equipment, the present invention highly integrates the functions of ozone oxidation, powdered activated carbon circulation and ceramic membrane filtration, and has high operational flexibility; the operating mode and backwashing mode can be adjusted according to the raw water quality, has strong adaptability to water quality, and occupies a small area.

Description

Technical Field

[0001] The invention belongs to the technical field of water treatment equipment, and in particular relates to a tank-type membrane filtration device for municipal water treatment. Background Art

[0002] Ceramic membranes are inorganic membranes characterized by corrosion resistance, high stability, and long lifespan, making them ideal for water treatment. With the advancement of ceramic membrane technology and the reduction of production costs, their applications, such as in the municipal water treatment industry, will increase significantly. Currently, ceramic membrane assemblies are generally plate- and tube-type, with the inlet and outlet water of each assembly independently connected to the main inlet and outlet pipes. This requires numerous connections, resulting in high investment costs and a high probability of leakage during operation, which limits the promotion and application of ceramic membranes. Furthermore, ceramic membrane filtration devices generally only provide membrane filtration functions, making it difficult to adjust operating and backwashing methods to different raw water qualities, and their adaptability to water quality is poor. Summary of the Invention

[0003] In response to the common problems existing in the prior art, the present invention provides a multifunctional tank-type ceramic membrane filtration equipment, which integrates ozone oxidation, powdered activated carbon circulation and ceramic membrane filtration functions in one, improves operational flexibility and water quality adaptability, and saves floor space, flushing time and water consumption.

[0004] To achieve the above object, the present invention is implemented through the following technical solutions:

[0005] A tank-type ceramic membrane filtration device includes a tank body, a water inlet pipe, a vent pipe, a multifunctional pipe, a water inlet distribution pipe, a separation wing plate, a ceramic membrane assembly, a ceramic membrane assembly water production pipe, an air flushing pipe, an upper drainage pipe, and a water production pipe; the water inlet pipe and the vent pipe are located below the tank body and are connected to the bottom of the tank body; the multifunctional pipe, water inlet distribution pipe, separation wing plate, and ceramic membrane assembly are located in the middle of the tank body, the air flushing pipe is located on the lower side of the ceramic membrane assembly, the ceramic membrane assembly water production pipe is located above the ceramic membrane assembly, the upper drainage pipe is located on the upper side of the ceramic membrane assembly, and the water production pipe is located on the upper side of the tank body.

[0006] Furthermore, the water inlet distribution pipe is vertically arranged in the tank body, and the lower end is connected to the water inlet pipe; the diameter of the lower side of the water inlet distribution pipe is locally reduced to form a pipe throat, and the Venturi effect is used to form local suction; the separation wing plate is composed of a vertical section and a bent section that is bent toward the side wall of the tank body, and the vertical section is vertically arranged between the ceramic membrane assembly and the water inlet distribution pipe, and there is a gap between the bent section and the side wall of the tank body, so that water can enter the ceramic membrane filtration area through the gap between the side wall of the tank body and the bent section of the separation wing plate; the ceramic membrane filtration area located above the bent section of the separation wing plate The ceramic membrane assembly is vertically arranged between the inner wall of the tank body and the vertical section of the separation wing plate, and its upper part is connected to the water production pipe of the ceramic membrane assembly; the upper end of the water production pipe of the ceramic membrane assembly is connected to the water production pipe; the throat of the water inlet distribution pipe is connected to a multifunctional pipe leading to the outside of the tank body, and when compressed air can be introduced into the multifunctional pipe, it is used to increase the suction force of the throat of the water inlet distribution pipe and enhance the fluid circulation effect; an air flushing pipe connected to the outside of the tank body is provided below the ceramic membrane assembly; the upper side wall of the tank body is provided with an upper drainage pipe connected to the tank body.

[0007] Furthermore, a plurality of the ceramic membrane assemblies are arranged closely and in parallel with each other, so that unified water intake, water production, flushing and drainage of the plurality of ceramic membrane assemblies can be achieved.

[0008] Furthermore, the multifunctional tube can be one or more tubes for adding ozone, compressed air or powdered activated carbon, etc. During operation, one or more tubes can be opened as needed.

[0009] Furthermore, a bracket is provided below the water inlet distribution pipe; and a gap is provided between the bracket and the tank body, which can be communicated with the space below the separation wing plate.

[0010] Furthermore, when the tank-type ceramic membrane filtration equipment adopts the air pressure explosion washing mode, it also includes a partition top plate, an upper cover body and a compressed air pipe provided on the upper part thereof.

[0011] Furthermore, the partition top plate is located above the tank body and is fixedly connected to the inner wall of the tank body by welding, and the connection is sealed.

[0012] Furthermore, the ceramic membrane assembly water production pipe passes through the partition top plate, and the connection between the partition top plate and the ceramic membrane assembly water production pipe is sealed.

[0013] Furthermore, the ceramic membrane assembly is suspended on the partition top plate, or a support for fixing the ceramic membrane assembly is provided under the ceramic membrane assembly.

[0014] Furthermore, the side wall or top of the partition top plate may be connected to an exhaust pipe.

[0015] Furthermore, the tank-type ceramic membrane filtration equipment can adopt an air-water flushing mode or an air pressure explosion flushing mode. A further preferred embodiment is that in the air pressure explosion flushing mode, the compressed air pressure is 0.4-0.8 MPa.

[0016] Furthermore, the filtration mode of the tank-type ceramic membrane filtration device includes cross-flow filtration or dead-end filtration mode.

[0017] Furthermore, the tank-type ceramic membrane filtration equipment can adopt a pressure filtration method or an immersion suction filtration method; when the pressure filtration method is adopted, a partition top plate needs to be set; when the immersion suction filtration method is adopted, a partition top plate can be set or not.

[0018] Furthermore, the tank-type ceramic membrane filtration equipment can adopt an air-water flushing mode or an air pressure explosion flushing mode.

[0019] Furthermore, the tank-type ceramic membrane filtration equipment may adopt a direct filtration mode of a ceramic membrane assembly, or a series mode of ozone oxidation or powdered activated carbon circulation pretreatment and ceramic membrane filtration.

[0020] Compared with conventional ceramic membrane filtration equipment, the technical solution of the present invention has the following beneficial effects:

[0021] 1. The tank-type ceramic membrane filtration equipment provided by this invention can adjust its operating and backwashing modes according to the raw water quality, improving its adaptability to water quality. While ensuring the quality of the diluted water, this adjustment can also reduce operating costs. For example, using the pneumatic explosive flushing mode shortens flushing time and reduces water consumption.

[0022] 2. The tank-type ceramic membrane filtration system of this invention incorporates multiple ceramic membrane assemblies, enabling unified water intake, production, flushing, and drainage. This saves piping and fittings, reduces head loss, improves water and gas distribution uniformity, and reduces construction costs. The impact flushing method employed enhances flushing effectiveness, eliminates the need for a backwash tank and pump, and further reduces construction costs.

[0023] 3. The present invention highly integrates the functions of ozone oxidation, powdered activated carbon circulation and ceramic membrane filtration, with reasonable and compact layout, small footprint, high operational flexibility, strong adaptability to water quality, small footprint and high treatment efficiency.

[0024] 4. The overall structural design of the present invention can adopt a pressure filtration mode or an immersion suction filtration mode according to operational needs; it can adopt a cross-flow filtration mode or a dead-end filtration mode; it can adopt a ceramic membrane component direct filtration mode, or a series mode of ozone oxidation or powdered activated carbon circulation pretreatment and ceramic membrane filtration; it can adopt a conventional air-water flushing mode, or a gas pressure explosion flushing mode, which can improve the flushing effect while saving water and reducing the flushing time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a cross-sectional view of the tank-type ceramic membrane filtration device in Example 1;

[0026] Figure 2 Schematic diagram of the partition top plate of the tank-type ceramic membrane filtration device in Example 1;

[0027] Figure 3 yes Figure 2 AA cross-section of

[0028] Figure 4 This is a top view of the tank body of the tank-type ceramic membrane filtration device in Example 1;

[0029] Figure 5 is a cross-sectional view of the tank-type ceramic membrane filtration device in Example 2;

[0030] Figure 6 It is a cross-sectional view of the tank-type ceramic membrane filtration device in Example 3.

[0031] As shown in the figure: upper cover body 1, partition top plate 2, tank body 3, water inlet pipe 4, water production pipe 5, upper drainage pipe 6, ceramic membrane assembly 7, compressed air pipe 8, multi-function pipe 9, air flushing pipe 10, water inlet distribution pipe 11, separation wing plate 12, ceramic membrane assembly water production pipe 13, exhaust pipe 14, ceramic membrane assembly water production pipe installation hole 15, exhaust hole 16, vent pipe 17. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0033] Example 1

[0034] like Figure 1-4As shown, a multifunctional tank-type ceramic membrane filtration equipment is provided, which adopts a pressure filtration method, including an upper cover body 1, a partition top plate 2, a tank body 3, a water inlet pipe 4, a water production pipe 5, an upper drainage pipe 6, a ceramic membrane assembly 7, a compressed air pipe 8, a multifunctional pipe 9, an air flushing pipe 10, a water inlet distribution pipe 11, a separation wing plate 12, a ceramic membrane assembly water production pipe 13, an exhaust pipe 14, a ceramic membrane assembly water production pipe mounting hole 15, an exhaust hole 16, and a vent pipe 17. The water inlet pipe 4 and the vent pipe 17 are located below the tank body 3 and are connected to the bottom of the tank body 3; the water inlet distribution pipe 11 is vertically arranged in the tank body 3, and the lower end is connected to the water inlet pipe 4; the lower side diameter of the water inlet distribution pipe 11 is locally reduced to form a throat, and the Venturi effect is used to form local suction; the separation wing plate 12 is composed of a vertical section and a bent section that is bent toward the side wall of the tank body 3. The vertical section is vertically arranged between the ceramic membrane assembly 7 and the water inlet distribution pipe 11. There is a gap between the bent section and the side wall of the tank body 3. The water enters the ceramic membrane filtration area through the gap between the side wall of the tank body 3 and the bent section of the separation wing plate 12; the ceramic membrane assembly 7 located above the bent section of the separation wing plate 12 is vertically arranged between the inner wall of the tank body 3 and the vertical section of the separation wing plate 12. Several ceramic membrane assemblies 7 are arranged parallel to each other and closely, which can realize unified water intake, water production, flushing and drainage of multiple sets of ceramic membrane assemblies 7. An upper cover 1 is located above the tank body 3, with a partition top plate 2 provided between the tank body 3 and the upper cover 1. The ceramic membrane assembly water production pipe 13 passes through the partition top plate 2 and is connected to the ceramic membrane assembly 7. A compressed air pipe 8 and a water production pipe 5 are provided at the top of the upper cover 1, communicating with the interior of the upper cover 1. The ceramic membrane assembly 7 is suspended from the partition top plate 2, and a support member for fixing the ceramic membrane assembly 7 may also be provided below the ceramic membrane assembly 7. A multifunctional pipe 9 leading to the outside of the tank body 3 is connected to the throat of the water inlet distribution pipe 11. The multifunctional pipe 9 can be one or more multifunctional pipes and can be used individually or simultaneously. The multifunctional pipe 9 can be used to add ozone, compressed air, or powdered activated carbon, etc., and compressed air can also be introduced to increase the suction force at the throat of the water inlet distribution pipe 11 and enhance the fluid circulation effect. A bracket is provided below the water inlet distribution pipe 11; there is a gap between the bracket and the tank body 3 that is connected to the space below the separation wing 12. An air flushing pipe 10 communicating with the outside of the tank body 3 is provided below the ceramic membrane assembly 7; an upper drainage pipe 6 communicating with the inside of the tank body 3 is provided on the upper side wall of the tank body 3; and an exhaust pipe 14 is connected to the side wall of the partition top plate 2.

[0035] When using ceramic ultrafiltration membrane components for direct filtration and adopting dead-end filtration mode, the water to be treated enters the tank body 3 through the water inlet pipe 4, passes through the water inlet distribution pipe 11, the gap between the tank body 3 and the separation wing plate 12, the ceramic membrane component 7, and the ceramic membrane component water production pipe 13, enters the upper cover body 1, and is collected and discharged by the water production pipe 5. When the quality of the water to be treated is poor, a cross-flow filtration mode can be adopted, and the upper drain pipe 6 is opened. The water to be treated enters the tank body 3 through the water inlet pipe 4, passes through the water inlet distribution pipe 11, the gap between the tank body 3 and the separation wing plate 12, enters the ceramic membrane filtration area, and part of the water to be treated passes through the ceramic membrane component 7 and the ceramic membrane component water production pipe 13, enters the upper cover body 1, and is collected and discharged by the water production pipe 5. Part of the water to be treated is discharged from the tank body 3 through the outside of the ceramic membrane component 7 and the upper drain pipe 6, which has a certain flushing effect on the surface of the ceramic membrane component 7 and alleviates ceramic membrane pollution.

[0036] When using a series combination of ozone oxidation and ceramic membrane filtration with dead-end filtration, a multifunctional pipe 9 is installed. Water to be treated flows from the water inlet pipe 4 through the water inlet distribution pipe 11 into the tank body 3. Multifunctional pipe 9 introduces ozone into the water inlet distribution pipe 11. The water to be treated comes into contact with the ozone, undergoing a partial redox reaction. The water then enters the ceramic membrane filtration zone through the gap between the tank body 3 and the separation wing 12. The ozone-containing water is filtered by the ceramic membrane assembly 7, enters the upper cover 1, and is collected and discharged by the water production pipe 5. As the ozone-containing water passes through the ceramic membrane assembly 7, it simultaneously achieves the ozone catalytic oxidation reaction and the physical filtration of the ceramic membrane. When the quality of the water to be treated is poor, the cross-flow filtration mode can be adopted, the upper drainage pipe 6 is opened, and the water to be treated enters the tank body 3 from the water inlet pipe 4 through the water inlet distribution pipe 11, and the multi-functional pipe 9 introduces ozone into the water inlet distribution pipe. The water to be treated contacts and reacts with the ozone, and enters the ceramic membrane filtration area through the gap between the tank body 3 and the separation wing plate 12. Part of the water to be treated containing ozone passes through the ceramic membrane assembly 7 and the ceramic membrane assembly water production pipe, enters the upper cover body 1, and is collected and discharged by the water production pipe 5. Part of the water to be treated containing ozone is discharged from the tank body 3 through the outside of the ceramic membrane assembly 7 and the upper drainage pipe 6, which has a certain flushing effect on the surface of the ceramic membrane assembly 7, thereby alleviating the pollution of the ceramic membrane.

[0037] When the series mode of powdered activated carbon adsorption and ceramic membrane filtration and the dead-end filtration mode are adopted, two multifunctional tubes 9 are set, and the water to be treated enters the tank body 3 from the water inlet pipe 4 through the water inlet distribution pipe 11. One multifunctional tube 9 introduces powdered activated carbon into the water inlet distribution pipe 11, and one multifunctional tube 9 introduces compressed air into the water inlet distribution pipe 11 to enhance the water flow lifting capacity in the water inlet distribution pipe 11. The water to be treated is mixed with the powdered activated carbon and turns down from the upper part of the water inlet distribution pipe 11 into the lower space of the separation wing plate 12. Part of the water to be treated and a small amount of powdered activated carbon enter the ceramic membrane filtration area through the gap between the tank body 3 and the separation wing plate 12 for filtration. A small amount of powdered activated carbon is isolated outside the ceramic ultrafiltration membrane and precipitated into the lower space of the separation wing plate 12 through the gap between the tank body 3 and the separation wing plate 12. The treated water and powdered activated carbon in the space below the separation wing 12 are drawn into the water inlet distribution pipe 11 through the gap between the water inlet distribution pipe 11 and the bottom of the tank body, recycling the powdered activated carbon and removing non-polar small organic molecules. When the treated water quality is poor, a cross-flow filtration mode can be used. The upper drain pipe 6 is opened, and some of the filtered water entering the ceramic membrane filtration area is discharged from the tank body 3 through the exterior of the ceramic membrane assembly 7 and the upper drain pipe 6. This has a certain scouring effect on the surface of the ceramic membrane assembly 7, alleviating ceramic membrane contamination.

[0038] When physical flushing adopts the conventional air-water flushing mode, close the water inlet pipe 4, close the vent pipe 17, open the upper drain pipe 6 and the exhaust pipe 14, start the backwash pump, and the produced water enters the upper cover body 1 from the water production pipe 5, is reversely filtered through the ceramic membrane assembly 7, and carries the pollutants on the membrane surface into the tank body 3 and is discharged through the upper drain pipe 6. During water flushing, start the air compressor or blower, and compressed air enters the air flushing pipe 10. While the water flow flushes the ceramic membrane assembly 7, air scrubbing is performed to improve the physical flushing effect. When physical flushing adopts the air pressure explosion washing mode, close the water inlet pipe 4, close the vent pipe 17, close the water production pipe 5, open the exhaust pipe 14, start the air compressor or blower, and compressed air with a pressure of 0.4-0.8MPa enters the upper cover body 1 from the compressed air pipe 8, pushing the water in the upper cover body 1 to quickly pass through the ceramic membrane assembly 7. When the flushing effect needs to be enhanced, compressed air can be simultaneously input into the gas flushing pipe 10. While the water flow flushes the ceramic membrane assembly 7, gas scrubbing is performed to improve the physical flushing effect.

[0039] Before chemical flushing, perform a physical clean. Then, close the water inlet pipe 4, switch the vent pipe 17 to the chemical circulation pump's inlet direction, and switch the produced water pipe 5 to the chemical circulation pump's outlet direction. Start the chemical circulation pump to pump water from the tank 3 and upper cover 1. Acid, alkali, or oxidant is added and circulated back into the upper cover 1 to chemically clean the ceramic membrane assembly 7. After chemical cleaning, physical cleaning is required before entering filtration mode. Chemical cleaning wastewater must be neutralized and meet standards before discharge.

[0040] Example 2

[0041] like Figure 5 As shown, a multifunctional tank-type ceramic membrane filtration equipment is provided, which adopts an immersed suction filtration method, including a partition top plate 2, a tank body 3, a water inlet pipe 4, a water production pipe 5, an upper drainage pipe 6, a ceramic membrane assembly 7, a multifunctional pipe 9, an air flushing pipe 10, a water inlet distribution pipe 11, a separation wing plate 12, a ceramic membrane assembly water production pipe 13, an exhaust pipe 14, and a vent pipe 17. The water inlet pipe 4 and the vent pipe 17 are located below the tank body 3 and are connected to the bottom of the tank body 3; the water inlet distribution pipe 11 is vertically arranged in the tank body 3, and the lower end is connected to the water inlet pipe 4; the lower side diameter of the water inlet distribution pipe 11 is locally reduced to form a throat, and the Venturi effect is used to form local suction; the separation wing plate 12 is composed of a vertical section and a bent section that is bent toward the side wall of the tank body 3. The vertical section is vertically arranged between the ceramic membrane assembly 7 and the water inlet distribution pipe 11. There is a gap between the bent section and the side wall of the tank body 3. The water enters the ceramic membrane filtration area through the gap between the side wall of the tank body 3 and the bent section of the separation wing plate 12; the ceramic membrane assembly 7 located above the bent section of the separation wing plate 12 is vertically arranged between the inner wall of the tank body 3 and the vertical section of the separation wing plate 12. Several ceramic membrane assemblies 7 are arranged parallel to each other and closely, which can realize unified water intake, water production, flushing and drainage of multiple sets of ceramic membrane assemblies 7. A partition top plate 2 is located above the tank body 3. The ceramic membrane assembly water production pipe 13 passes through this partition top plate 2 and connects to the ceramic membrane assembly 7. The other end of this pipe 13 is connected to the water production pipe 5. A vent hole 16 can be provided in the partition top plate 2, connecting to the exhaust pipe 14. Alternatively, the exhaust pipe 14 can be directly extended upward from the bottom of the partition top plate 2. The ceramic membrane assembly 7 is suspended from the partition top plate 2. A support member can also be provided below the ceramic membrane assembly 7 to secure it. A multifunctional pipe 9, which leads to the exterior of the tank body 3, is connected to the throat of the water inlet distribution pipe 11. This multifunctional pipe 9 can be single or multiple, and can be used individually or simultaneously. This multifunctional pipe 9 can be used to inject ozone, compressed air, or powdered activated carbon. It can also be used to introduce compressed air to increase suction at the throat of the water inlet distribution pipe 11 and enhance fluid circulation. A bracket is located below the water inlet distribution pipe 11. A gap is defined between the bracket and the tank body 3, connecting to the space below the separation wing 12. An air flushing pipe 10 communicating with the outside of the tank body 3 is provided below the ceramic membrane assembly 7 ; an upper drainage pipe 6 communicating with the inside of the tank body 3 is provided on the upper side wall of the tank body 3 .

[0042] When using a ceramic ultrafiltration membrane assembly for direct filtration and adopting a dead-end filtration mode, the water to be treated enters the tank body 3 through the water inlet pipe 4, passes through the water inlet distribution pipe 11, the gap between the tank body 3 and the separation wing plate 12, the ceramic membrane assembly 7, and the ceramic membrane assembly water production pipe 13, and is collected and discharged by the water production pipe 5. When the quality of the water to be treated is poor, a cross-flow filtration mode can be adopted, and the upper drain pipe 6 is opened. The water to be treated enters the tank body 3 through the water inlet pipe 4, passes through the water inlet distribution pipe 11, the gap between the tank body 3 and the separation wing plate 12, and enters the ceramic membrane filtration area. Part of the water to be treated passes through the ceramic membrane assembly 7 and the ceramic membrane assembly water production pipe 13, and is collected and discharged by the water production pipe 5. Part of the water to be treated is discharged from the tank body 3 through the outside of the ceramic membrane assembly 7 and the upper drain pipe 6, which has a certain flushing effect on the surface of the ceramic membrane assembly 7 and alleviates ceramic membrane pollution.

[0043] When using a series combination of ozone oxidation and ceramic membrane filtration with dead-end filtration, a multifunctional pipe 9 is installed. Water to be treated flows from the water inlet pipe 4 through the water inlet distribution pipe 11 into the tank 3. Multifunctional pipe 9 introduces ozone into the water inlet distribution pipe 11. The ozone-containing water comes into contact with the ozone, undergoing a partial redox reaction. The water then enters the ceramic membrane filtration zone through the gap between the tank 3 and the separation wing 12. The ozone-containing water is filtered by the ceramic membrane assembly 7 and collected and discharged through the water production pipe 5. As the ozone-containing water passes through the ceramic membrane assembly 7, both the ozone catalytic oxidation reaction and the physical filtration of the ceramic membrane are simultaneously achieved. When the quality of the water to be treated is poor, the cross-flow filtration mode can be adopted. The upper drainage pipe 6 is opened, and the water to be treated enters the tank body 3 from the water inlet pipe 4 through the water inlet distribution pipe 11. The multi-functional pipe 9 introduces ozone into the water inlet distribution pipe. The water to be treated contacts and reacts with the ozone, and enters the ceramic membrane filtration area through the gap between the tank body 3 and the separation wing plate 12. Part of the water to be treated containing ozone passes through the ceramic membrane assembly 7 and the ceramic membrane assembly water production pipe 13, and is collected and discharged by the water production pipe 5. Part of the water to be treated containing ozone is discharged from the tank body 3 through the outside of the ceramic membrane assembly 7 and the upper drainage pipe 6, which has a certain flushing effect on the surface of the ceramic membrane assembly 7, thereby alleviating the pollution of the ceramic membrane.

[0044] When the series mode of powdered activated carbon adsorption and ceramic membrane filtration and the dead-end filtration mode are adopted, two multifunctional tubes 9 are set, and the water to be treated enters the tank body 3 from the water inlet pipe 4 through the water inlet distribution pipe 11. One multifunctional tube 9 introduces powdered activated carbon into the water inlet distribution pipe 11, and one multifunctional tube 9 introduces compressed air into the water inlet distribution pipe 11 to enhance the water flow lifting capacity in the water inlet distribution pipe 11. The water to be treated is mixed with the powdered activated carbon and turns down from the upper part of the water inlet distribution pipe 11 into the lower space of the separation wing plate 12. Part of the water to be treated and a small amount of powdered activated carbon enter the ceramic membrane filtration area through the gap between the tank body 3 and the separation wing plate 12 for filtration. A small amount of powdered activated carbon is isolated outside the ceramic ultrafiltration membrane and precipitated into the lower space of the separation wing plate 12 through the gap between the tank body 3 and the separation wing plate 12. The treated water and powdered activated carbon in the space below the separation wing 12 are drawn into the water inlet distribution pipe 11 through the gap between the water inlet distribution pipe 11 and the bottom of the tank body, recycling the powdered activated carbon and removing non-polar small organic molecules. When the treated water quality is poor, a cross-flow filtration mode can be used. The upper drain pipe 6 is opened, and some of the filtered water entering the ceramic membrane filtration area is discharged from the tank body 3 through the exterior of the ceramic membrane assembly 7 and the upper drain pipe 6. This has a certain scouring effect on the surface of the ceramic membrane assembly 7, alleviating ceramic membrane contamination.

[0045] During physical flushing, close the water inlet pipe 4, close the vent pipe 17, open the upper drain pipe 6 and the exhaust pipe 14, and start the backwash pump. Backwash water flows through the water production pipe 5 and reverses through the ceramic membrane assembly 7 to flush. If the flushing effect needs to be enhanced, compressed air can be simultaneously input into the air flushing pipe 10. While the water flow flushes the ceramic membrane assembly 7, air scrubbing is performed to enhance the physical flushing effect.

[0046] Before chemical flushing, physical cleaning is performed. Afterward, the water inlet pipe 4 is closed, the vent pipe 17 is switched to the chemical circulation pump's inlet direction, and the water production pipe 5 is switched to the chemical circulation pump's outlet direction. The chemical circulation pump is activated to pump water from the tank 3. Acid, alkali, or oxidant is added, and the water is returned through the water production pipe 5 to the ceramic membrane assembly 7 for chemical cleaning. After chemical cleaning, physical cleaning is required before filtration can begin. Chemical cleaning wastewater must be neutralized and meet standards before discharge.

[0047] Example 3

[0048] like Figure 6As shown, a multifunctional tank-type ceramic membrane filtration equipment adopts an immersed suction filtration method, including a tank body 3, a water inlet pipe 4, a water production pipe 5, an upper drainage pipe 6, a ceramic membrane assembly 7, a multifunctional pipe 9, an air flushing pipe 10, a water inlet distribution pipe 11, a separation wing plate 12, a ceramic membrane assembly water production pipe 13, and a vent pipe 17. The water inlet pipe 4 and the vent pipe 17 are located below the tank body 3 and are connected to the bottom of the tank body 3; the water inlet distribution pipe 11 is vertically arranged in the tank body 3, and the lower end is connected to the water inlet pipe 4; the lower side diameter of the water inlet distribution pipe 11 is locally reduced to form a throat, and the Venturi effect is used to form local suction; the separation wing plate 12 is composed of a vertical section and a bent section that is bent toward the side wall of the tank body 3. The vertical section is vertically arranged between the ceramic membrane assembly 7 and the water inlet distribution pipe 11. There is a gap between the bent section and the side wall of the tank body 3. The water enters the ceramic membrane filtration area through the gap between the side wall of the tank body 3 and the bent section of the separation wing plate 12; the ceramic membrane assembly 7 located above the bent section of the separation wing plate 12 is vertically arranged between the inner wall of the tank body 3 and the vertical section of the separation wing plate 12. Several ceramic membrane assemblies 7 are arranged parallel to each other and closely, which can realize unified water intake, water production, flushing and drainage of multiple sets of ceramic membrane assemblies 7. One end of the ceramic membrane assembly water production pipe 13 is connected to the ceramic membrane assembly 7, and the other end is connected to the water production pipe 5. A support for fixing the ceramic membrane assembly 7 is provided under the ceramic membrane assembly 7. The throat of the water inlet distribution pipe 11 is connected to a multifunctional pipe 9 leading to the outside of the tank body 3. The multifunctional pipe 9 can be one or more and can be used individually or simultaneously. The multifunctional pipe 9 can be used to add ozone, compressed air or powdered activated carbon, etc., and compressed air can also be introduced to increase the suction force of the throat of the water inlet distribution pipe 11 and enhance the fluid circulation effect. A bracket is provided below the water inlet distribution pipe 11; there is a gap between the bracket and the tank body 3 that can be connected to the lower space of the separation wing plate 12. An air flushing pipe 10 connected to the outside of the tank body 3 is provided below the ceramic membrane assembly 7; an upper drain pipe 6 is provided on the upper side wall of the tank body 3.

[0049] When using a ceramic ultrafiltration membrane assembly for direct filtration and adopting a dead-end filtration mode, the water to be treated enters the tank body 3 through the water inlet pipe 4, passes through the water inlet distribution pipe 11, the gap between the tank body 3 and the separation wing plate 12, the ceramic membrane assembly 7, and the ceramic membrane assembly water production pipe 13, and is collected and discharged by the water production pipe 5. When the quality of the water to be treated is poor, a cross-flow filtration mode can be adopted, and the upper drain pipe 6 is opened. The water to be treated enters the tank body 3 through the water inlet pipe 4, passes through the water inlet distribution pipe 11, the gap between the tank body 3 and the separation wing plate 12, and enters the ceramic membrane filtration area. Part of the water to be treated passes through the ceramic membrane assembly 7 and the ceramic membrane assembly water production pipe 13, and is collected and discharged by the water production pipe 5. Part of the water to be treated is discharged from the tank body 3 through the outside of the ceramic membrane assembly 7 and the upper drain pipe 6, which has a certain flushing effect on the surface of the ceramic membrane assembly 7 and alleviates ceramic membrane pollution.

[0050] When the series mode of powdered activated carbon adsorption and ceramic membrane filtration and the dead-end filtration mode are adopted, two multifunctional tubes 9 are set, and the water to be treated enters the tank body 3 from the water inlet pipe 4 through the water inlet distribution pipe 11. One multifunctional tube 9 introduces powdered activated carbon into the water inlet distribution pipe 11, and one multifunctional tube 9 introduces compressed air into the water inlet distribution pipe 11 to enhance the water flow lifting capacity in the water inlet distribution pipe 11. The water to be treated is mixed with the powdered activated carbon and turns down from the upper part of the water inlet distribution pipe 11 into the lower space of the separation wing plate 12. Part of the water to be treated and a small amount of powdered activated carbon enter the ceramic membrane filtration area through the gap between the tank body 3 and the separation wing plate 12 for filtration. A small amount of powdered activated carbon is isolated outside the ceramic ultrafiltration membrane and precipitated into the lower space of the separation wing plate 12 through the gap between the tank body 3 and the separation wing plate 12. The treated water and powdered activated carbon in the space below the separation wing 12 are drawn into the water inlet distribution pipe 11 through the gap between the water inlet distribution pipe 11 and the bottom of the tank body, recycling the powdered activated carbon and removing non-polar small organic molecules. When the treated water quality is poor, a cross-flow filtration mode can be used. The upper drain pipe 6 is opened, and some of the filtered water entering the ceramic membrane filtration area is discharged from the tank body 3 through the exterior of the ceramic membrane assembly 7 and the upper drain pipe 6. This has a certain scouring effect on the surface of the ceramic membrane assembly 7, alleviating ceramic membrane contamination.

[0051] During physical flushing, close the water inlet pipe 4, close the vent pipe 17, open the upper drain pipe 6, and start the backwash pump. Backwash water flows through the water production pipe 5 and reverses through the ceramic membrane assembly 7 to flush. If the flushing effect needs to be enhanced, compressed air can be simultaneously input into the air flushing pipe 10. While the water flow flushes the ceramic membrane assembly 7, air scrubbing is performed to enhance the physical flushing effect.

[0052] Before chemical flushing, physical cleaning is performed. Afterward, the water inlet pipe 4 is closed, the vent pipe 17 is switched to the chemical circulation pump's inlet direction, and the water production pipe 5 is switched to the chemical circulation pump's outlet direction. The chemical circulation pump is activated to pump water from the tank 3. Acid, alkali, or oxidant is added, and the water is returned through the water production pipe 5 to the ceramic membrane assembly 7 for chemical cleaning. After chemical cleaning, physical cleaning is required before filtration can begin. Chemical cleaning wastewater must be neutralized and meet standards before discharge.

[0053] The present invention has a reasonable and compact layout and occupies a small area; the membrane filtration equipment adopts multiple filter columns to unify water intake, water production, flushing and drainage, saving pipelines and pipe fittings, reducing head loss, improving the uniformity of water and gas distribution, and reducing construction costs; the impact flushing method adopted can improve the flushing effect, eliminate the backwash water tank and backwash water pump, and further reduce construction costs.

[0054] The above are only preferred embodiments of the present invention and do not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A tank-type ceramic membrane filtration device, characterized in that: The invention comprises a tank body (3), a water inlet pipe (4), a vent pipe (17), a multifunctional pipe (9), a water inlet distribution pipe (11), a separation wing plate (12), a ceramic membrane assembly (7), a ceramic membrane assembly water production pipe (13), an air flushing pipe (10), an upper drainage pipe (6), and a water production pipe (5); the water inlet pipe (4) and the vent pipe (17) are located below the tank body (3) and are connected to the bottom of the tank body (3); the multifunctional pipe (9), the water inlet distribution pipe (11), the separation wing plate (12), and the ceramic membrane assembly (7) are located in the middle of the tank body (3); the air flushing pipe (10) is located at the lower side of the ceramic membrane assembly (7); the ceramic membrane assembly water production pipe (13) is located above the ceramic membrane assembly (7); the upper drainage pipe (6) is located at the upper side of the ceramic membrane assembly (7); and the water production pipe (5) is located at the upper side of the tank body (3); The water inlet distribution pipe (11) is vertically arranged in the tank body (3), and the lower end is connected to the water inlet pipe (4); the lower side diameter of the water inlet distribution pipe (11) is locally reduced to form a pipe throat; the separation wing plate (12) is composed of a vertical section and a bent section bent toward the side wall of the tank body (3); the vertical section is vertically arranged between the ceramic membrane assembly (7) and the water inlet distribution pipe (11), and there is a gap between the bent section and the side wall of the tank body (3), so that water can enter the ceramic membrane filtration area through the gap between the side wall of the tank body (3) and the bent section of the separation wing plate (12); the separation wing plate (12) is located at the bent section of the separation wing plate (12). The ceramic membrane assembly (7) above the segment is vertically arranged between the inner side wall of the tank body (3) and the vertical segment of the separation wing plate (12), and its upper part is connected to the ceramic membrane assembly water production pipe (13); the upper end of the ceramic membrane assembly water production pipe (13) is connected to the water production pipe (5); the throat of the water inlet distribution pipe (11) is connected to a multifunctional pipe (9) leading to the outside of the tank body (3); an air flushing pipe (10) connected to the outside of the tank body (3) is provided below the ceramic membrane assembly (7); the upper side wall of the tank body (3) is provided with an upper drainage pipe (6) connected to the inside of the tank body (3); The tank-type ceramic membrane filtration equipment can be a pressure filtration method or an immersion suction filtration method; when the pressure filtration method is adopted, a partition top plate needs to be provided; when the immersion suction filtration method is adopted, a partition top plate may be provided or not; The tank-type ceramic membrane filtration equipment can adopt a ceramic membrane assembly direct filtration mode, or a series mode of ozone oxidation or powdered activated carbon circulation pretreatment and ceramic membrane filtration.

2. A tank-type ceramic membrane filtration device according to claim 1, characterized in that: The plurality of ceramic membrane components (7) are closely arranged in parallel with each other.

3. The tank-type ceramic membrane filtration equipment according to claim 1, characterized in that: The multifunctional tube (9) is one or more tubes.

4. A tank-type ceramic membrane filtration device according to claim 1, characterized in that: A bracket is provided below the water inlet distribution pipe (11); and a gap is provided between the bracket and the tank body (3) that can communicate with the lower space of the separation wing plate (12).

5. The tank-type ceramic membrane filtration equipment according to claim 1, characterized in that: When the tank-type ceramic membrane filtration equipment adopts the air pressure explosion washing mode, it also includes a partition top plate (2), an upper cover (1) and a compressed air pipe (8) provided on the upper part thereof.

6. The tank-type ceramic membrane filtration equipment according to claim 5, characterized in that: The partition top plate (2) is located above the tank body (3) and is fixedly connected to the inner side wall of the tank body (3) by welding, and the connection is sealed.

7. The tank-type ceramic membrane filtration device according to claim 5, characterized in that: The ceramic membrane assembly water production pipe (13) passes through the partition top plate (2), and the connection between the partition top plate (2) and the ceramic membrane assembly water production pipe (13) is sealed.

8. The tank-type ceramic membrane filtration equipment according to claim 1, characterized in that: The ceramic membrane assembly (7) is suspended on the partition top plate (2), or a support for fixing the ceramic membrane assembly (7) is provided under the ceramic membrane assembly (7).

9. The tank-type ceramic membrane filtration device according to claim 5, characterized in that: The side wall or top of the partition top plate (2) may be connected to an exhaust pipe (14).

10. The tank-type ceramic membrane filtration equipment according to claim 1, characterized in that: The tank-type ceramic membrane filtration equipment adopts an air-water flushing mode or an air pressure explosion flushing mode.

11. The tank-type ceramic membrane filtration equipment according to claim 1, characterized in that: The filtration mode of the tank-type ceramic membrane filtration device includes cross-flow filtration or dead-end filtration mode.

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