Solid-liquid separation device for wastewater treatment

Abstract

The utility model relates to the technical field of wastewater treatment, and provides a solid-liquid separation device for wastewater treatment, which comprises a shell and a membrane component, the shell is provided with a water inlet and a water outlet positioned above the water inlet, the membrane component comprises a membrane bracket and a membrane wire group, the membrane bracket comprises an end cover, a support rod and a fixed rod, the end cover and the fixing rod are respectively mounted at the upper and lower ends of the supporting rod, the end cover is provided with a first through hole, two ends of the membrane wire group are respectively fixed on the end cover at intervals, the middle part of the membrane wire group is wound on the fixing rod, the membrane component is positioned in the shell, and the end cover is fixedly arranged between the water inlet and the water outlet. Wherein water enters from the middle lower part of the shell, water is produced from the upper part of the shell, suspended matters with large specific gravity naturally settle, the probability that the suspended matters are adhered to membrane wires is reduced, the membrane wire group is mounted on the membrane bracket in a U shape, the phenomenon that cleaning dead angles are easily generated due to knotting at a fixed rod below is avoided, and the cleaning frequency and cleaning difficulty of the membrane wires are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a solid-liquid separation device for wastewater treatment. Background Art

[0002] Membrane Bio-Reactor (MBR) is a new technology that combines biological treatment technology with membrane separation. It replaces the traditional secondary sedimentation tank with a membrane component with high separation efficiency. Compared with traditional biological treatment technology, membrane bioreactor has the advantages of impact resistance, good water quality, and easy automation control. The membrane bioreactor is mainly composed of two parts: the bioreactor and the solid-liquid separation device (membrane component). The bioreactor is the main degradation site of pollutants in wastewater. The solid-liquid separation device mainly plays the role of solid-liquid separation.

[0003] In the existing solid-liquid separation device, the membrane wire is in a straight line shape, and the upper and lower ends of the membrane wire are knotted and fixed to the membrane wire support. There is a cleaning dead angle at the knotted part of the membrane wire, which is not easy to backwash and is easy to accumulate sludge. Utility Model Content

[0004] The utility model aims to provide a solid-liquid separation device for wastewater treatment, aiming to solve the technical problem that membrane fibers of the existing solid-liquid separation device for wastewater treatment are difficult to clean.

[0005] The present application provides a solid-liquid separation device for wastewater treatment, which comprises a shell and a membrane assembly, wherein the shell has a water inlet and a water outlet located above the water inlet, the membrane assembly comprises a membrane support and a membrane wire group, the membrane support comprises an end cover, a support rod and a fixing rod, the end cover and the fixing rod are respectively installed at the upper and lower ends of the support rod, the end cover has a first through hole, the two ends of the membrane wire group are respectively fixed to the end cover at intervals, the middle part of the membrane wire group is wound around the fixing rod, the membrane assembly is located in the shell, and the end cover is fixedly arranged between the water inlet and the water outlet.

[0006] In one embodiment, the number of the fixing rods is at least two, and at least two of the fixing rods are spaced apart along the circumference of the support rod. The number of the membrane wire groups corresponds one to one to the number of the fixing rods, and the middle part of the membrane wire group is wound around the corresponding fixing rod.

[0007] In one embodiment, the membrane support further includes a reinforcement ring, which is arranged around the support rod, one end of the fixing rod is connected to the support rod, and the other end of the fixing rod is connected to the reinforcement ring.

[0008] In one embodiment, the membrane support further includes a handle, and the handle is fixed to the top end of the support rod.

[0009] In one embodiment, the support rod is inserted into the first through hole, and the membrane support further includes a reinforcing rib, one end of the reinforcing rib is connected to the end cover, and the other end of the reinforcing rib is connected to the support rod.

[0010] In one embodiment, the number of the reinforcing ribs is more than two, and the more than two reinforcing ribs are spaced apart along the circumference of the support rod.

[0011] In one embodiment, the wastewater treatment solid-liquid separation device also includes a module pressure plate and a sealing plate, the module pressure plate and the sealing plate are fixedly installed in the shell, the module pressure plate and the sealing plate both have a second through hole that passes through in the height direction, the end cover is sealed and installed between the module pressure plate and the sealing plate, and the first through hole and the second through hole are connected.

[0012] In one embodiment, the number of the second through holes is more than two, and the more than two second through holes are distributed at intervals along the circumference of the module pressing plate.

[0013] In one of the embodiments, the module pressing plate and the sealing plate are detachably connected.

[0014] In one embodiment, the shell has an air purge inlet and an air purge outlet located above the air purge inlet, and the air purge outlet is located below the end cover.

[0015] In one of the embodiments, the wastewater treatment solid-liquid separation device further includes an aeration pipe, wherein the aeration pipe is located inside the shell, one end of the aeration pipe is connected to the air wash inlet, and the other end of the aeration pipe extends upward.

[0016] In one embodiment, a plurality of aeration holes are arranged on the circumference of the aeration tube.

[0017] In one of the embodiments, the end of the aeration pipe away from the air wash inlet is higher than the water inlet.

[0018] In one embodiment, the end of the aeration pipe away from the air washing inlet is lower than the air washing outlet.

[0019] In one embodiment, the air wash inlet is lower than the water inlet.

[0020] In one of the embodiments, an air inlet valve for controlling the on / off of the air wash inlet is provided at the air wash inlet.

[0021] In one of the embodiments, a first exhaust valve for controlling the opening and closing of the air washing outlet is provided at the air washing outlet.

[0022] In one of the embodiments, the shell has an exhaust hole, and the exhaust hole is located above the water outlet. A second exhaust valve for controlling the opening and closing of the exhaust hole is arranged at the exhaust hole.

[0023] In one of the embodiments, a drain port is disposed at the bottom of the shell, and a sealing flange is detachably disposed at the drain port.

[0024] In one embodiment, the shell includes a shell body and a top cover, and the top cover is installed on the top of the body in an openable and closable manner.

[0025] In one embodiment, a rocker arm is connected to the top of the top cover.

[0026] The beneficial effects of the solid-liquid separation device for wastewater treatment provided by the utility model are as follows: wastewater enters the shell from the water inlet located at the bottom, is separated into solid and liquid through the membrane filament group, leaves the membrane assembly through the first through hole of the end cover, and leaves the shell from the water outlet located at the top, wherein the membrane filament group is installed on the membrane bracket in a U shape, rather than being knotted at both ends in an I shape, to avoid knotting at the fixing rod below and easily causing cleaning dead corners, especially suspended matter with a larger specific gravity is easy to gather at the bottom, and the water outlet is located at the water inlet, so that water is taken in from the middle and lower part and water is produced from the upper part, so that suspended matter with a larger specific gravity can be naturally settled, and the probability of suspended matter adhering to the membrane filaments is reduced, thereby solving the technical problem that the membrane filaments of the existing solid-liquid separation device for wastewater treatment are not easy to clean, thereby reducing the number of cleaning times and the difficulty of cleaning the membrane filaments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 A schematic diagram of the external structure of a solid-liquid separation device for wastewater treatment provided by an embodiment of the utility model;

[0029] Figure 2 A perspective view of a solid-liquid separation device for wastewater treatment (without the membrane assembly) provided in an embodiment of the utility model;

[0030] Figure 3 for Figure 2 A cross-sectional view of a solid-liquid separation device for wastewater treatment;

[0031] Figure 4 An exploded view of a module pressing plate and a sealing plate of a solid-liquid separation device for wastewater treatment provided by an embodiment of the utility model;

[0032] Figure 5 A schematic diagram of the structure of a membrane assembly of a solid-liquid separation device for wastewater treatment provided by an embodiment of the utility model;

[0033] Figure 6 Another perspective view of the membrane assembly of the solid-liquid separation device for wastewater treatment provided by the embodiment of the utility model;

[0034] Figure 7 for Figure 6 A schematic diagram of the structure of a membrane support of a membrane assembly;

[0035] Figure 8 for Figure 7 Another perspective view of the membrane support in .

[0036] Among them, the reference numerals in the figure are:

[0037] 100, shell; 101, water inlet; 102, water outlet; 103, air wash inlet; 104, air wash outlet; 105, exhaust hole; 106, drain outlet; 110, shell body; 120, top cover; 130, rocker arm; 140, pressure gauge;

[0038] 200, membrane assembly; 210, membrane support; 211, end cover; 212, support rod; 213, fixing rod; 214, first through hole; 215, reinforcement ring; 216, handle; 217, reinforcement rib; 220, membrane wire group;

[0039] 310, module pressing plate; 320, sealing plate; 330, second through hole; 340, pressing plate nut; 350, connecting column; 360, aeration pipe; 361, aeration hole. DETAILED DESCRIPTION

[0040] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0041] Reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in one embodiment" or "in some embodiments" appear in various places throughout the specification, not all references are to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0042] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] Combination Figure 1 , Figure 2 , Figure 5 and Figure 6 The present application provides a solid-liquid separation device for wastewater treatment. The solid-liquid separation device for wastewater treatment includes a housing 100 and a membrane assembly 200. The housing 100 has a water inlet 101 and a water outlet 102 located above the water inlet 101. The membrane assembly 200 includes a membrane support 210 and a membrane wire group 220. The membrane support 210 includes an end cover 211, a support rod 212 and a fixing rod 213. The end cover 211 and the fixing rod 213 are respectively installed at the upper and lower ends of the support rod 212. The end cover 211 has a first through hole 214. The two ends of the membrane wire group 220 are respectively fixed to the end cover 211 at intervals. The middle part of the membrane wire group 220 is wound around the fixing rod 213. The membrane assembly 200 is located in the housing 100, and the end cover 211 is fixedly arranged between the water inlet 101 and the water outlet 102.

[0046] If the membrane filament group 220 is assembled into type I, that is, the two ends of the membrane filament group 220 are respectively knotted and fixed on the end cover 211 and the fixing rod 213, firstly, there is always a dead angle at the knot, which is not easy to backwash and easy to accumulate sludge. Secondly, each maintenance of the membrane filament group 220 requires the shell 100 to be emptied or the entire membrane assembly 200 to be disassembled to another pool for cleaning, and the cleaning pool is large, and the amount of reagents used is large. The cleaning pool is emptied after one cleaning, resulting in huge waste. If it is stored until the next time it is used, the risk of custody is relatively large, and there are certain safety hazards. Thirdly, when the solid-liquid separation device for wastewater treatment is operated in negative pressure mode, the wastewater circulates in the shell 100 under negative pressure, and the treatment flux is low, resulting in the need to increase the volume of the treatment equipment.

[0047] The solid-liquid separation device for wastewater treatment provided by the present application, wastewater enters the housing 100 from the water inlet 101 located at the bottom, is separated into solid and liquid through the membrane wire group 220, leaves the membrane assembly 200 through the first through hole 214 of the end cover 211, and leaves the housing 100 from the water outlet 102 located at the top. Among them, compared with the dead corners existing in the conventional column ultrafiltration, immersion ultrafiltration and other membrane wire I-type designs, the membrane wire group 220 is installed on the membrane support 210 in a U-shape, rather than being knotted at both ends of the I-type, so as to avoid knotting at the fixed rod 213 below and easily generating a cleaning dead corner, especially when there are suspended solids with a large specific gravity gathered below, and the water outlet 102 is located at the water inlet 101, so as to realize water inlet in the middle and lower part and water production in the upper part, so that the suspended solids with a large specific gravity can be naturally settled, and the probability of suspended solids adhering to the membrane wire is reduced, and the technical problem that the membrane wire of the existing solid-liquid separation device for wastewater treatment is not easy to clean is solved, thereby reducing the number of cleaning times and the difficulty of cleaning the membrane wire.

[0048] In some embodiments, in combination Figure 5 and Figure 6 , the end caps 211 at both ends of the membrane wire group 220 are detachable and washable, which facilitates the disassembly of the membrane wire group 220. When the membrane assembly 200 needs to be cleaned, it is only necessary to remove the membrane wire group 220 from the end cap 211 for cleaning, without disassembling the entire membrane assembly 200, thereby reducing the amount of disassembly, and while cleaning the membrane wire group 220, the spare membrane wire group 220 can be installed on the end cap 211, ensuring that the solid-liquid separation device for wastewater treatment can operate continuously, improve work efficiency, and increase treatment flux. Correspondingly, when treating wastewater with the same flux, the solid-liquid separation device for wastewater treatment can be miniaturized. In addition, the membrane wire group 220 is detachable, and membrane wire groups 220 of different materials can be replaced according to different water qualities to achieve the best economic benefits or treatment effects.

[0049] In some embodiments, in combination Figure 5 and Figure 6 The membrane wire group 220 can be a single bundle or multiple bundles, which is not limited here.

[0050] In some embodiments, in combination Figure 5 and Figure 6 , the number of fixed rods 213 is at least two, at least two fixed rods 213 are distributed at intervals along the circumference of the support rod 212, the number of membrane wire groups 220 corresponds to the number of fixed rods 213, and the middle part of the membrane wire group 220 is wound around the corresponding fixed rod 213. Based on this, at least two fixed rods 213 are distributed at intervals circumferentially, which effectively increases the stability of the membrane support 210. Similarly, the membrane wire groups 220 are evenly stretched and distributed, so that the pressure in the solid-liquid separation process is more uniform, and the processing efficiency is improved. Multiple membrane wire groups 220 are conducive to increasing the processing flux. Correspondingly, when treating wastewater with the same flux, the solid-liquid separation device for wastewater treatment can be designed to be miniaturized. Multiple membrane wire groups 220 are distributed at intervals circumferentially, do not interfere with each other, and are easier to maintain and clean.

[0051] In one embodiment, a plurality of membrane filament groups 220 are alternately installed on the end cap 211 along the circumference of the support rod 212 to further reduce entanglement of the structure above.

[0052] In one embodiment, the connection position of each membrane wire group 220 on the end cover 211 and the corresponding fixing rod 213 are approximately located on the same radial direction of the support rod 212, that is, the projection angle between the two is within 30°.

[0053] In some embodiments, in combination Figure 7 and Figure 8 The membrane support 210 further includes a reinforcement ring 215, which is arranged around the support rod 212, one end of the fixing rod 213 is connected to the support rod 212, and the other end of the fixing rod 213 is connected to the reinforcement ring 215. The reinforcement ring 215 is arranged around the support rod 212, which can increase the overall rigidity and stability of the membrane support 210. The fixing rod 213 is connected to the reinforcement ring 215, so that the deflection and displacement of the fixing rod 213 are reduced, and the overall stability of the membrane assembly 200 is further increased.

[0054] In some embodiments, in combination Figure 7 and Figure 8 The membrane support 210 further includes a handle 216, which is fixed to the top of the support rod 212. The handle 216 is fixed to the top of the support rod 212, which facilitates the operator to lift and move the entire membrane assembly 200 during transportation and installation, and facilitates the removal of the membrane assembly 200 for cleaning, thereby reducing the labor intensity during the installation process and improving work efficiency.

[0055] In some embodiments, in combination Figure 7 and Figure 8The support rod 212 is passed through the first through hole 214, and the membrane support 210 further includes a reinforcing rib 217, one end of the reinforcing rib 217 is connected to the end cover 211, and the other end of the reinforcing rib 217 is connected to the support rod 212. The reinforcing rib 217 can effectively increase the overall stability and bearing capacity of the upper part of the membrane support 210, prevent lateral deformation or distortion during operation, and at the same time help to disperse the force between the support rod 212 and the end cover 211, and reduce local stress concentration.

[0056] In one embodiment, there are more than two reinforcing ribs 217. The two or more reinforcing ribs 217 are spaced apart along the circumference of the support rod 212, so that the top of the membrane support 210 is more evenly stressed, effectively reducing the risk of rupture or deformation caused by excessive local stress.

[0057] The number of the reinforcing ribs 217 and the number of the fixing rods 213 may be the same or different. The reinforcing ribs 217 and the fixing rods 213 may be located in the same radial direction of the support rod 212, or may be staggered with each other, which is not limited here. Optionally, the number of the reinforcing ribs 217 and the number of the fixing rods 213 are the same, and the projections along the length direction of the support rod 212 overlap.

[0058] In some embodiments, in combination Figure 3 and Figure 4 The solid-liquid separation device for wastewater treatment also includes a module pressing plate 310 and a sealing plate 320, which are fixedly installed in the housing 100, and both the module pressing plate 310 and the sealing plate 320 have a second through hole 330 that runs through in the height direction. The end cover 211 is sealed and installed between the module pressing plate 310 and the sealing plate 320, and the first through hole 214 and the second through hole 330 are connected, ensuring that the produced water after solid-liquid separation flows to the water outlet 102 through the first through hole 214 and the second through hole 330, thereby preventing the leakage of wastewater that has not been separated from the solid and liquid. The module pressing plate 310 and the sealing plate 320 jointly determine the installation position of the end cover 211, thereby improving the position accuracy and stability of the end cover 211. The end cap 211 is located between the module pressing plate 310 and the sealing plate 320 to prevent the end cap 211 from being exposed and contaminated, and to prevent the membrane wire group 220 connected to the end cap 211 from being contaminated, that is, to ensure the cleanliness of the connection of the membrane wire group 200 without any cleaning dead corners.

[0059] In one embodiment, in combination Figure 3 and Figure 4The number of the second through holes 330 is more than two, and the more than two second through holes 330 are spaced apart along the circumference of the module pressing plate 310, which helps to balance the load distribution of multiple membrane assemblies 200, reduce the situation where a single membrane assembly 200 is subjected to excessive force, and ensure that wastewater in different areas is uniformly treated. Each second through hole 330 can be configured with a membrane assembly 200, which increases the processing capacity and efficiency of the solid-liquid separation treatment device. Multiple membrane assemblies 200 are separated by intervals, which facilitates the maintenance, replacement or adjustment of the membrane assembly 200 according to specific processing requirements.

[0060] In one embodiment, in combination Figure 3 and Figure 4 The module pressing plate 310 and the sealing plate 320 are detachably connected, so that the membrane assembly 200 can be easily disassembled and connected, and the maintenance, cleaning and overhaul of the membrane assembly 200 are convenient.

[0061] Specifically, combined Figure 4 The sealing plate 320 is fixedly provided with a connecting column 350, and the connecting column 350 passes through the module pressing plate 310 and is threadedly connected with the pressing plate nut 340. By disassembling and assembling the pressing plate nut 340, the module pressing plate 310 and the sealing plate 320 can be detachably connected.

[0062] Specifically, the module pressing plate 310 is located above the sealing plate 320. Optionally, the pressing plate nut 340 is located above the module pressing plate 310 to facilitate the disassembly and assembly operation.

[0063] Specifically, a flange is provided on the circumference of the end cover 211 , and the flange is clamped and fixed between the module pressing plate 310 and the sealing plate 320 . The flange is arranged around the circumference of the support rod 212 to achieve 360° sealing clamping and fixing.

[0064] In some embodiments, a water inlet pipe is installed at the water inlet 101 , and the water inlet pipe is at least partially located outside the housing 100 .

[0065] In some embodiments, a water production pipe is installed at the water outlet 102 , and the water production pipe is at least partially located outside the housing 100 .

[0066] In some embodiments, in combination Figure 1 and Figure 2The housing 100 has an air wash inlet 103 and an air wash outlet 104 located above the air wash inlet 103, and the air wash outlet 104 is located below the end cover 211. The air wash inlet 103 and the air wash outlet 104 located above help to form a good air flow channel, and introduce gas into the wastewater treatment device through the air wash inlet 103, thereby improving the air wash effect, effectively cleaning the membrane assembly 200 of the solid-liquid separation device, and ensuring its normal operation. Based on this, intermittent aeration is achieved through the air wash inlet 103 and the air wash outlet 104, and the membrane wire group 220 is shaken by aeration regularly, thereby extending the cleaning cycle of the membrane wire group 220 and saving fan energy consumption.

[0067] In one embodiment, in combination Figure 2 and Figure 3 The solid-liquid separation device for wastewater treatment further includes an aeration pipe 360, which is located inside the housing 100. One end of the aeration pipe 360 ​​is connected to the air washing inlet 103, and the other end of the aeration pipe 360 ​​extends upward, so that the gas can be evenly distributed in the wastewater, improving the contact and mixing effect between the wastewater and the gas. The bubbles generated during the aeration process will form an upward fluid force, which can drive and transport the suspended matter in the wastewater, promote the separation and precipitation of the suspended matter, and avoid clogging of the membrane fiber group 220.

[0068] Specifically, combined Figure 2 and Figure 3 A plurality of aeration holes 361 are arranged around the aeration tube 360, so that the gas is evenly released into the wastewater from multiple positions, the uniformity of gas distribution in the entire wastewater treatment device is increased, and the gas-liquid contact and mixing effect is improved. By increasing the number of aeration holes 361, the surface area of ​​the bubble release can be increased, providing more gas contact interfaces, thereby increasing gas mass transfer and mass transfer efficiency, and improving gas utilization efficiency.

[0069] Optionally, the end of the aeration tube 360 ​​away from the air washing inlet 103 is closed, which limits the airflow to be discharged from the peripheral side of the aeration tube 360, increases the airflow path, and improves the gas-liquid contact and mixing effect.

[0070] Specifically, the end of the aeration pipe 360 ​​away from the air washing inlet 103 is higher than the water inlet 101. On the one hand, it prevents the gas from directly short-circuiting to the water inlet 101, and on the other hand, it prevents the gas from touching the sediment below the water inlet 101, which can reduce the impact on these settled suspended matter and reduce the risk of re-suspension due to scouring.

[0071] Specifically, the end of the aeration pipe 360 ​​away from the air wash inlet 103 is lower than the air wash outlet 104, which avoids the gas segment from recording the air wash outlet 104, so that the bubbles can be better distributed in the entire wastewater treatment device, increasing the gas-liquid mixing effect and improving the efficiency of wastewater treatment.

[0072] Specifically, the air wash inlet 103 and the water inlet 101 are located on opposite sides of the housing 100 so that the gas and liquid supplies do not interfere with each other.

[0073] Specifically, the air wash outlet 104 and the water outlet 102 are located on opposite sides of the housing 100 so that water production and exhaust gas do not interfere with each other.

[0074] Specifically, the air wash inlet 103 and the water outlet 102 are located on the same side of the housing 100, and the air wash outlet 104 and the water inlet 101 are located on the same side of the housing 100, so that the gas and liquid flow crosswise and increase gas-liquid mixing.

[0075] Specifically, the gas wash inlet 103 is lower than the water inlet 101, which can better control the balance between the gas pressure and the water inlet flow rate, thereby improving the operational stability and controllability of the entire system.

[0076] Specifically, an air intake valve for controlling the on-off of the air intake 103 is provided at the air wash inlet 103, so as to achieve precise control of the air wash inlet 103 and improve the flexibility of air intake operation.

[0077] Specifically, a first exhaust valve for controlling the on-off of the gas washing outlet 104 is provided at the gas washing outlet 104, so as to achieve precise control of the gas washing outlet 104, reduce gas leakage, and effectively control the pressure of the gas washing system.

[0078] Specifically, combined Figure 2 and Figure 3 The shell 100 has an exhaust hole 105, and the exhaust hole 105 is located above the water outlet 102. The exhaust hole 105 is provided with a second exhaust valve for controlling the opening and closing of the exhaust hole 105. The second exhaust valve cooperates with water production and exhausts air during water production to prevent the accumulation of gas inside the shell 100 and affect the water production flux. The gas accumulated in the wastewater treatment process is discharged in time to maintain the normal working pressure inside the system. The second exhaust valve can avoid cavitation inside the cylinder. When replacing or maintaining the membrane wire group 220, opening the second exhaust valve can avoid difficulties in opening the cover caused by negative pressure or siphoning inside the cylinder when opening the cover.

[0079] In one embodiment, a drain port 106 is disposed at the bottom of the shell 100 , and a sealing flange is detachably disposed at the drain port 106 , so as to facilitate the discharge of the solution with a high mud content in the cylinder.

[0080] In one embodiment, the housing 100 includes a housing body 110 and a top cover 120, and the top cover 120 can be installed on the top of the housing body in an openable and closable manner. The opening and closing design of the top cover 120 makes repair and maintenance more convenient and facilitates the removal and placement of the membrane filament group 220. The top cover 120 can be installed on the top of the housing body 100 in an openable and closable manner, which can provide good sealing performance, ensure that the working environment inside the equipment is isolated from the outside world, prevent wastewater from leaking out or outside air from entering, and ensure the stability and effect of the treatment process.

[0081] In one embodiment, a rocker arm 130 is connected to the top of the top cover 120 to facilitate opening the cover for maintenance, which can effectively reduce labor costs and is more suitable for medium-sized processing equipment.

[0082] In one embodiment, a pressure gauge 140 is connected to the top of the top cover 120 for detecting the internal pressure of the housing 100 .

[0083] In combination with the specific structure, before the operation of the solid-liquid separation device for wastewater treatment provided in the present application, the opening time of the second exhaust valve is set to ensure that the air is exhausted. Before aeration is turned on, the first exhaust valve is opened to drain the water first, and after the first exhaust valve has drained the water, aeration is turned on to ensure the best aeration effect. During aeration, the aeration volume is controlled to prevent the aeration volume from being too large and the membrane fiber group 220 from being seriously disturbed. During solid-liquid separation treatment, the pressure difference of the shell 100 is controlled to prevent the pressure difference from being too large and damaging the membrane fiber group 220. Control the water inlet pressure / backwash pressure of the equipment to prevent the water inlet pressure from being too high and damaging the membrane fiber group 220. When the water output is too small or the pressure difference exceeds the specified value, the membrane fiber group 220 is chemically cleaned in time.

[0084] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A solid-liquid separation device for wastewater treatment, characterized in that: The wastewater treatment solid-liquid separation device includes a shell and a membrane assembly, the shell has a water inlet and a water outlet located above the water inlet, the membrane assembly includes a membrane support and a membrane wire group, the membrane support includes an end cover, a support rod and a fixing rod, the end cover and the fixing rod are respectively installed at the upper and lower ends of the support rod, the end cover has a first through hole, the two ends of the membrane wire group are respectively fixed to the end cover at intervals, the middle part of the membrane wire group is wound around the fixing rod, the membrane assembly is located in the shell, and the end cover is fixedly arranged between the water inlet and the water outlet.

2. The solid-liquid separation device for wastewater treatment according to claim 1, characterized in that: The number of the fixing rods is at least two, and at least two of the fixing rods are distributed at intervals along the circumference of the support rod. The number of the membrane wire groups corresponds to the number of the fixing rods one by one, and the middle part of the membrane wire group is wound around the corresponding fixing rod.

3. The solid-liquid separation device for wastewater treatment according to claim 1, characterized in that: The membrane support further comprises a reinforcement ring, which is arranged around the support rod, one end of the fixing rod is connected to the support rod, and the other end of the fixing rod is connected to the reinforcement ring; And / or, the membrane support further includes a handle, and the handle is fixed to the top end of the support rod.

4. The solid-liquid separation device for wastewater treatment according to claim 1, characterized in that: The support rod is inserted into the first through hole, and the membrane support further comprises a reinforcing rib, one end of the reinforcing rib is connected to the end cover, and the other end of the reinforcing rib is connected to the support rod; The number of the reinforcing ribs is more than two, and the more than two reinforcing ribs are distributed at intervals along the circumference of the support rod.

5. The solid-liquid separation device for wastewater treatment according to claim 1, characterized in that: The wastewater treatment solid-liquid separation device also includes a module pressure plate and a sealing plate, which are fixedly installed in the shell, and both the module pressure plate and the sealing plate have a second through hole that passes through in the height direction. The end cover is sealed and installed between the module pressure plate and the sealing plate, and the first through hole is connected to the second through hole.

6. The solid-liquid separation device for wastewater treatment according to claim 5, characterized in that: The number of the second through holes is more than two, and the more than two second through holes are distributed at intervals along the circumference of the module pressing plate; And / or, the module pressing plate and the sealing plate are detachably connected.

7. The solid-liquid separation device for wastewater treatment according to claim 1, characterized in that: The shell has an air wash inlet and an air wash outlet located above the air wash inlet, and the air wash outlet is located below the end cover.

8. The solid-liquid separation device for wastewater treatment according to claim 7, characterized in that: The wastewater treatment solid-liquid separation device further comprises an aeration pipe, wherein the aeration pipe is located inside the shell, one end of the aeration pipe is connected to the air washing inlet, and the other end of the aeration pipe extends upward; A plurality of aeration holes are arranged on the circumference of the aeration pipe; The end of the aeration pipe away from the air washing inlet is higher than the water inlet; The end of the aeration pipe away from the air washing inlet is lower than the air washing outlet; The air wash inlet is lower than the water inlet; An air inlet valve for controlling the on-off of the air wash inlet is provided at the air wash inlet; The air washing outlet is provided with a first exhaust valve for controlling the opening and closing of the air washing outlet.

9. The solid-liquid separation device for wastewater treatment according to claim 1, characterized in that: The shell has an exhaust hole, the exhaust hole is located above the water outlet, and a second exhaust valve for controlling the opening and closing of the exhaust hole is arranged at the exhaust hole; And / or, a drain port is provided at the bottom of the shell, and a sealing flange is detachably provided at the drain port.

10. The solid-liquid separation device for wastewater treatment according to any one of claims 1 to 9, characterized in that: The shell comprises a shell body and a top cover, wherein the top cover is installed on the top of the shell body in an openable and closable manner; and a rocker arm is connected to the top of the top cover.

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