Multi-sheet combined flat sheet membrane assembly

Abstract

The utility model discloses a multi-piece combined flat membrane component, which belongs to the technical field of environment-friendly sewage treatment equipment and structurally comprises a water collecting cavity frame body, a water outlet hole pipe, membrane units, inter-piece pressing rings, a pressing plate frame body, a screw rod, a nut and a screw rod lantern ring, due to the fact that the supporting plate with the thickness ranging from 0.1 mm to 2 mm is used or the diaphragm unit without the supporting plate is adopted, the manufacturing cost of the multi-piece combined type flat plate membrane assembly is greatly reduced compared with that of a vertical hard plate flat plate membrane assembly. During cleaning, the nuts on the screw rods can be unscrewed, and the membrane units can be detached for cleaning, so that the membrane can be cleaned more easily compared with a multi-piece integrated soft-piece flat-plate membrane assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to a flat membrane module belongs to the sewage treatment equipment technical field of environmental protection, especially a kind of multi-piece combined flat membrane module applied in membrane bioreactor. BACKGROUND

[0002] At present, membrane bioreactor, namely MBR technology, is widely applied in sewage treatment, and the membrane bioreactor is a new type of wastewater treatment system combining membrane separation technology and biological treatment technology. The membrane module replaces the secondary sedimentation tank at the end of the traditional biological treatment technology. The flat membrane module is one of the most important membrane modules in the membrane bioreactor. The flat membrane module includes a flat membrane module, a membrane frame and an aeration pipe. The physical form of the flat membrane module is various. At present, the mainstream is vertical hard plate flat membrane module and multi-piece integrated soft flat membrane module.

[0003] The vertical hard plate flat membrane module, as shown in Figure 9 , is composed of a vertical support plate with a thickness of 5 to 10 mm, a flow guide plate and a membrane sheet. The support plate, also known as a flow guide plate, has longitudinal and transverse grooves on both sides for water flow. The flow guide plate is made of two pieces of non-woven fabric or mesh with a thickness of 0.5 to 2 mm, which are arranged on both sides of the support plate. The membrane sheet is composed of two pieces, which are arranged on the outer side of the flow guide plate and are welded or bonded to the support plate around the periphery. At least one water outlet is provided on the top or side of the support plate. The water outlet is connected to the cavity formed in the middle of the two membrane sheets. During operation, the water that passes through the membrane sheet enters the inside of the membrane module and flows out through the water outlet.

[0004] During operation, as shown in Figure 11 , the membrane frame is arranged in the sewage tank. The membrane frame is composed of an upper horizontal pipe, a lower horizontal pipe and a vertical pipe. The upper horizontal pipe and the lower horizontal pipe are fixedly connected through the vertical pipe. The aeration pipe is arranged below the lower horizontal pipe and is connected to the aeration fan through a pipeline. The vertical hard plate flat membrane module is vertically installed between the upper horizontal pipe and the lower horizontal pipe of the membrane frame. The water outlet of the membrane module is connected to the water collecting pipe through a hose. One end of the water production pipe is connected to the inlet of the water production pump, and the other end is connected to the water collecting pipe. One end of the clean water pipe is connected to the outlet of the water production pump, and the other end is connected to the clean water tank. During water production, the aeration fan is started first. Air bubbles flow out of the through hole of the aeration pipe and contact the surface of the membrane sheet during the upward process, carrying away the pollutants on the surface of the membrane sheet. Then the water production pump is started. The pollutants in the sewage and water are separated at the membrane sheet through the negative pressure suction of the water production pump. The pollutants are trapped outside the membrane sheet, and the water enters the inside of the membrane sheet and then flows into the water collecting pipe, the water production pump and the clean water pipe, and finally into the clean water tank.

[0005] The multi-piece integrated soft flat membrane module, as shown in Figure 10 , is composed of a support plate, a flow guide plate and a membrane sheet. The support plate is made of a flexible material, such as rubber or plastic, and has a thickness of 0.5 to 2 mm. The flow guide plate is made of two pieces of non-woven fabric or mesh, which are arranged on both sides of the support plate. The membrane sheet is composed of two pieces, which are arranged on the outer side of the flow guide plate and are bonded to the support plate around the periphery.As shown: by the diaphragm unit and the water collecting cavity, the diaphragm unit is provided with at least two, the water collecting cavity is vertically arranged at the two ends of the diaphragm unit, the diaphragm unit comprises a supporting plate, a flow guide piece and a diaphragm, the supporting plate is a flat plate with a thickness of 0.1mm to 2mm, the flow guide piece is provided with two on the two sides of the supporting plate, the diaphragm is provided with two on the outer side of the flow guide piece, the diaphragm is connected with the water collecting cavity through epoxy resin or polyurethane glue pouring on the side close to the edge of the water collecting cavity, and the other edge is connected with the supporting plate through welding or bonding, the cavity in the inner side of the diaphragm unit is communicated with the cavity in the inner side of the water collecting cavity, the water outlet is arranged at the top of the water collecting cavity, and the water production pump is connected with the water outlet of the water collecting cavity through a pipeline; when running, the water penetrating through the diaphragm into the inside of the membrane assembly flows out through the water outlet at the upper part of the water collecting cavity. The membrane assembly generally adopts intermittent operation, that is, the water production pump is started for 8 minutes, stopped for 2 minutes, and the aeration fan is always operated.

[0006] The existing flat plate membrane assembly still has the following deficiencies:

[0007] The vertical hard plate flat plate membrane assembly has high manufacturing cost, the middle supporting plate needs a flat plate with a thickness of 5mm to 10mm, and the supporting plate is generally made of ABS plastic plate, and the material cost of the supporting plate accounts for about 40% of the cost of the membrane assembly; in order to maintain the supporting strength of the vertical hard plate flat plate membrane assembly, the cost is difficult to reduce;

[0008] The supporting plate of the multi-piece integrated soft plate flat plate membrane assembly is a flat plate with a thickness of 0.1mm to 2mm, and is generally made of ABS plastic plate; since the thickness of the supporting plate is reduced, the manufacturing cost is reduced, but the structure of the multi-piece integrated soft plate flat plate membrane assembly is that vertical water collecting cavities are arranged at two ends, and the multi-piece diaphragm units are connected with the water collecting cavities side by side, so that the multi-piece integrated soft plate flat plate membrane assembly is prone to accumulate silt in the gap between the diaphragm units when running, and when the multi-piece integrated soft plate flat plate membrane assembly is taken out from the sewage pool to clean the surface of the diaphragm, since the two ends between the diaphragm units are fixedly connected, the gap is small, the silt is difficult to clean, and the phenomenon of incomplete cleaning and damage to the diaphragm is prone to occur. SUMMARY

[0009] The utility model discloses to solve the deficiency of prior art, provide a multi-piece combined flat plate membrane assembly, the membrane assembly equipment saves manufacturing cost compared with vertical hard plate flat plate membrane assembly, and compared with multi-piece integrated soft plate flat plate membrane assembly, it is easy to clean.

[0010] The utility model discloses a technical scheme that solves the above problems: a multi-piece combined flat plate membrane assembly, which comprises a water collecting cavity frame body, a water outlet hole pipe, a membrane unit, a piece-to-piece pressing ring, a pressing plate frame body, a screw rod, a nut and a screw rod sleeve ring; the water collecting cavity frame body comprises an upper horizontal square tube, a lower horizontal square tube, a left vertical square tube and a right vertical square tube, the upper horizontal square tube and the lower horizontal square tube are connected through the left vertical square tube and the right vertical square tube, the water collecting cavity frame body is internally a cavity, a water outlet is arranged on the upper part of the upper horizontal square tube, or the outer side surface of the left vertical square tube and the right vertical square tube, at least one water inlet through hole is arranged on the side of the upper horizontal square tube or the left vertical square tube or the right vertical square tube facing the membrane, the water inlet through hole is communicated with the cavity inside the water collecting cavity frame body, an annular groove is arranged on the outer side of the water inlet through hole, a sealing ring is arranged in the annular groove, and a screw passing hole is arranged at each of the four corners of the water collecting cavity frame body; the membrane unit is divided into a membrane unit with a support plate and a membrane unit without a support plate, the membrane unit with a support plate comprises a support plate, a flow guide piece and a membrane, the support plate with a thickness of 0.1-2 mm is arranged in the middle part, the flow guide piece is two pieces, and is arranged on the two surfaces of the support plate; the membrane is two pieces, and is arranged on the outer side of the flow guide piece; the membrane unit without a support plate comprises a flow guide piece and a membrane, the flow guide piece is one piece, and is arranged in the middle; the membrane is two pieces, and is arranged on the outer side of the flow guide piece; the membrane is connected through welding or adhesion; at least one water outlet through hole is arranged on the membrane unit at the position opposite to the water inlet through hole of the water collecting cavity frame body; a screw passing hole is arranged on the membrane unit at the position opposite to the screw passing hole of the water collecting cavity frame body; the screw passing hole is closed through welding or adhesion; the pressing plate frame body comprises an upper horizontal square plate, a lower horizontal square plate, a left vertical square plate and a right vertical square plate, the upper horizontal square plate and the lower horizontal square plate are connected through the left vertical square plate and the right vertical square plate, the square plate of the pressing plate frame body has a thickness of 5-20 mm and a width of 20-45 mm; an annular groove is arranged at the position opposite to the water outlet through hole of the membrane unit of the pressing plate frame body; a sealing ring is arranged in the annular groove; a screw passing hole is arranged at each of the four corners of the pressing plate frame body; one end or both ends of the water outlet hole pipe are provided with openings, and the two ends are connected with the water inlet through holes of the water collecting cavity frame body, or one end is connected with the water inlet through hole of the water collecting cavity frame body, and the other end is connected with the inner side of the annular groove of the pressing plate frame body; a water passing through hole with a diameter of 5-15 mm is arranged on the water outlet hole pipe at intervals of 5-10 mm; the piece-to-piece pressing ring has a thickness of 3-10 mm, is arranged between the water outlet through holes of two membrane units, and has a hole pipe through hole in the middle part; annular grooves are arranged on the outer sides of the hole pipe through hole; sealing rings are arranged in the annular grooves; the screw rod sleeve ring has a thickness of 3-10 mm, is arranged between the screw passing holes of the water collecting cavity frame body and the membrane unit, or the membrane unit and the pressing plate frame body, or the two membrane units, and has a screw passing hole in the middle part; the screw rod passes through the screw passing holes of one water collecting cavity frame body, the membrane unit, the screw rod sleeve ring and the pressing plate frame body, or another water collecting cavity frame body; and the nut is arranged on the screw rod outside the water collecting cavity frame body or the pressing plate frame body.

[0011] Its beneficial effects are:

[0012] The utility model discloses a multi-piece combined flat membrane assembly, which uses a support plate with a thickness of 0.1 mm to 2 mm or a membrane unit without a support plate, so that the manufacturing cost of the membrane assembly is greatly reduced compared with a vertical hard flat membrane assembly. The membrane unit and the water collecting cavity frame are fixedly installed through screws. During cleaning, the nuts on the screw rods can be loosened, and the membrane unit can be disassembled and cleaned. The membrane unit is easier to clean than a multi-piece integrated soft flat membrane assembly. BRIEF DESCRIPTION OF DRAWINGS

[0013] The utility model discloses a multi-piece combined flat membrane assembly.

[0014] Figure 1 is the front view of the utility model discloses a multi-piece combined flat membrane assembly.

[0015] Figure 2 is the schematic view of the membrane unit of the utility model discloses a multi-piece combined flat membrane assembly.

[0016] Figure 3 is the schematic view of the water collecting cavity frame of the utility model discloses a multi-piece combined flat membrane assembly, and one side of the water collecting cavity frame is outwardly placed.

[0017] Figure 4 is the schematic view of the water outlet pipe of the utility model discloses a multi-piece combined flat membrane assembly.

[0018] Figure 5 is the schematic view of the inter-sheet pressing ring of the utility model discloses a multi-piece combined flat membrane assembly.

[0019] Figure 6 is the schematic view of the screw sleeve ring of the utility model discloses a multi-piece combined flat membrane assembly.

[0020] Figure 7 is the schematic view of the pressing plate frame of the utility model discloses a multi-piece combined flat membrane assembly, and one side of the pressing plate frame is outwardly placed.

[0021] Figure 8 is the schematic view of the utility model discloses a multi-piece combined flat membrane assembly in the running state of being installed on the membrane frame.

[0022] Figure 9 is the schematic view of the front view of the prior art vertical hard flat membrane assembly, and the membrane sheet at the lower part of the front view is removed.

[0023] Figure 10 is the schematic view of the front view of the prior art multi-piece integrated soft flat membrane assembly.

[0024] Figure 11 is the schematic view of the running state of the prior art flat membrane assembly.

[0025] Figure 1 is a water collection cavity frame, 2 is a flow guide, 3 is a support plate, 4 is a diaphragm, 5 is an upper horizontal pipe, 6 is a lower horizontal pipe, 7 is a vertical pipe, 8 is an aeration pipe, 9 is a water outlet pipe, 10 is a pressing plate frame, 11 is a inter-plate pressing ring, 12 is a screw sleeve ring, 13 is a water production pump, 14 is a water outlet, 15 is an aeration fan, 16 is a sewage pool, 17 is a clean water pool, 18 is a water production pipe, 19 is a water collection pipe, 20 is a clean water pipe, 21 is a hose, 22 is a nut, 23 is a vertical hard plate flat membrane assembly, 24 is a sealing ring, 25 is a diaphragm unit, 26 is a membrane rack, 27 is a water outlet through hole, 28 is a screw through hole, 29 is an annular groove, 30 is a water passing through hole, 31 is a water inlet through hole, 32 is a multi-piece combined flat membrane assembly, 33 is a water collection cavity, 34 is a hole pipe through hole, 35 is an upper horizontal square pipe, 36 is a lower horizontal square pipe, 37 is a left vertical square pipe, 38 is a right vertical square pipe, 39 is an upper horizontal square plate, 40 is a lower horizontal square plate, 41 is a left vertical square plate, 42 is a right vertical square plate. DETAILED DESCRIPTION

[0026] A multi-piece combined flat membrane assembly, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7The structure includes a water collecting cavity frame, a water outlet pipe, a diaphragm unit, a pressure ring between diaphragms, a pressure plate frame, a screw rod, a nut and a screw rod sleeve ring; the water collecting cavity frame includes an upper horizontal square tube, a lower horizontal square tube, a left vertical square tube and a right vertical square tube, the upper horizontal square tube and the lower horizontal square tube are connected through the left vertical square tube and the right vertical square tube, the inside of the water collecting cavity frame is a cavity, a water outlet is arranged on the upper part of the upper horizontal square tube or the outer side of the left vertical square tube and the right vertical square tube, at least one water inlet through hole is arranged on the side of the upper horizontal square tube or the left vertical square tube or the right vertical square tube facing the diaphragm, the water inlet through hole is communicated with the cavity inside the water collecting cavity frame, an annular groove is arranged on the outer side of the water inlet through hole, a sealing ring is arranged in the annular groove, and a screw passing hole is arranged at each of the four corners of the water collecting cavity frame; the diaphragm unit is divided into a diaphragm unit with a support plate and a diaphragm unit without a support plate, the diaphragm unit with the support plate includes a support plate, a flow guide piece and a diaphragm, the support plate with a thickness of 0.1 mm to 2 mm is arranged in the middle, the flow guide piece is two pieces and is arranged on the two sides of the support plate, and the diaphragm is two pieces and is arranged on the outer side of the flow guide piece, the diaphragm unit without the support plate includes a flow guide piece and a diaphragm, the flow guide piece is one piece and is arranged in the middle, and the diaphragm is two pieces and is arranged on the outer side of the flow guide piece, the diaphragm is connected through welding or adhesion, at least one water outlet through hole is arranged on the diaphragm unit at a position opposite to the water inlet through hole of the water collecting cavity frame, a screw passing hole is arranged on the diaphragm unit at a position opposite to the screw passing hole of the water collecting cavity frame, and the screw passing hole is closed through welding or adhesion; the pressure plate frame includes an upper horizontal square plate, a lower horizontal square plate, a left vertical square plate and a right vertical square plate, the upper horizontal square plate and the lower horizontal square plate are connected through the left vertical square plate and the right vertical square plate, the square plate of the pressure plate frame has a thickness of 5 mm to 20 mm and a width of 20 mm to 45 mm, an annular groove is arranged on the pressure plate frame at a position opposite to the water outlet through hole of the diaphragm unit, a sealing ring is arranged in the annular groove, and a screw passing hole is arranged at each of the four corners of the pressure plate frame; the water outlet pipe is provided with an opening at one end or two ends, the two ends are connected with the water inlet through holes of the water collecting cavity frames respectively, or one end is connected with the water inlet through hole of the water collecting cavity frame and the other end is connected with the inner side of the annular groove of the pressure plate frame, and a water passing through hole with a diameter of 5 mm to 15 mm is arranged on the water outlet pipe at intervals of 5 mm to 10 mm; the pressure ring between diaphragms has a thickness of 3 mm to 10 mm, is arranged between the water outlet through holes of two diaphragm units, and has a hole pipe through hole in the middle, annular grooves are arranged on the outer sides of the two sides of the hole pipe through hole, and sealing rings are arranged in the annular grooves; the screw rod sleeve ring has a thickness of 3 mm to 10 mm, is arranged between the screw passing holes of the water collecting cavity frame and the diaphragm unit or the diaphragm unit and the pressure plate frame or two diaphragm units, and has a screw passing hole in the middle; the screw rod passes through the screw passing holes of one water collecting cavity frame, the diaphragm unit, the screw rod sleeve ring and the pressure plate frame or another water collecting cavity frame, and the nut is arranged on the screw rod outside the water collecting cavity frame or the pressure plate frame.

[0027] The principle and operation process of the multi-diaphragm combined flat plate membrane assembly are described in detail below in combination with the drawings.

[0028] As Figure 8 shown: the membrane frame is arranged in the sewage pool, the aeration pipe is arranged below the lower transverse pipe and connected with the aeration fan through the pipeline, the multi-piece combined flat membrane assembly of the utility model is vertically installed between the upper transverse pipe and the lower transverse pipe of the membrane frame, the water outlet of the membrane assembly is connected with the water collecting pipe through the hose, the water production pump is arranged at the top of the sewage pool, one end of the water production pipe is connected with the liquid inlet of the water production pump, the other end is connected with the water collecting pipe, one end of the clean water pipe is connected with the liquid outlet of the water production pump, and the other end is connected with the clean water pool. During water production, the aeration fan is started first, air bubbles flow out through the through hole of the aeration pipe, contact the membrane surface during the rising process, and carry away the pollutants on the membrane surface, then the water production pump is started, the pollutants in the sewage and water are separated at the membrane through the negative pressure suction of the water production pump, the pollutants are intercepted outside the membrane, the water enters the inside of the membrane, enters the water outlet pipe through the water outlet through hole on the membrane, enters the cavity inside the water collecting cavity through the water inlet through hole of the water collecting cavity frame, and finally enters the clean water pool through the hose, the water production pipe, the water production pump and the clean water pipe.

[0029] The membrane assembly generally adopts intermittent operation, that is, the water production pump is started for 8 minutes and stopped for 2 minutes, and the aeration fan is always operated.

[0030] Due to the use of the 0.1mm to 2mm thick supporting plate or the membrane unit without the supporting plate, the manufacturing cost of the multi-piece combined flat membrane assembly of the utility model is greatly reduced compared with the vertical hard plate flat membrane assembly. When running for a period of time, the membrane unit of the multi-piece combined flat membrane assembly of the utility model is blocked by sludge, the multi-piece combined flat membrane assembly of the utility model needs to be taken out from the sewage pool or the membrane pool for cleaning, at this time, the nut on the water collecting cavity frame can be loosened, the screw rod in the screw through hole can be removed, all the membrane units can be taken down, and the cleaning can be performed one by one. After cleaning, it is installed back according to the original appearance. The cleaning method is easier to clean the membrane than the multi-piece integrated soft flat membrane assembly.

[0031] The above is only the preferred embodiment of the utility model, and it should be pointed out that for ordinary technical personnel in the technical field, without departing from the technical principle of the utility model, a number of improvements and decorations can be made, and these improvements and decorations should be regarded as the protection range of the utility model.

Claims

1. A multi-sheet combined flat sheet membrane module, an improvement on the flat sheet membrane module, mainly composed of a support plate, flow guide plates, and membrane sheets, characterized in that: Its structure includes a water collection chamber frame, an outlet pipe, a diaphragm unit, an inter-diaphragm pressure ring, a pressure plate frame, a screw rod, a nut, and a screw collar. The water collection chamber frame includes an upper horizontal square tube, a lower horizontal square tube, a left vertical square tube, and a right vertical square tube. The upper and lower horizontal square tubes are connected by the left and right vertical square tubes. The inside of the water collection chamber frame is a cavity. The outlet is located on the upper part of the upper horizontal square tube, or on the outer side of the left and right vertical square tubes. At least one water inlet hole is provided on the side of the upper horizontal square tube, the left vertical tube, or the right vertical tube facing the diaphragm. The water inlet hole communicates with the cavity inside the water collection chamber frame. An annular groove is provided on the outer side of the water inlet hole, and a sealing ring is provided in the annular groove. A through-hole for screws is provided at each of the four corners of the water collection chamber frame. The diaphragm unit is divided into diaphragm units with and without support plates. The diaphragm unit with support plates includes a support plate, guide vanes, and diaphragms. The support plate, 0.1 mm to 2 mm thick, is located in the middle. There are two guide vanes, one on each side of the support plate, and two diaphragms, one on each side of the guide vanes. The diaphragm unit without support plates includes guide vanes and diaphragms. There is one guide vane, located in the middle, and two diaphragms, one on each side of the guide vane. The edges of the diaphragms are connected by welding or bonding. The diaphragm unit has at least one outlet hole opposite to the inlet hole of the water collection chamber frame. A through-screw is provided opposite to the through-screw hole of the water collection chamber frame. Through holes and screw-through holes are sealed around their perimeter by welding or bonding; the pressure plate frame includes an upper horizontal square plate, a lower horizontal square plate, a left vertical square plate, and a right vertical square plate. The upper and lower horizontal square plates are connected by the left and right vertical square plates. The square plates of the pressure plate frame are 5 mm to 20 mm thick and 20 mm to 45 mm wide. An annular groove is provided at the position opposite to the water outlet through hole of the diaphragm unit on the pressure plate frame, and a sealing ring is installed in the annular groove. A screw-through hole is provided at each of the four corners of the pressure plate frame; the water outlet pipe has openings at one or both ends, with both ends connected to the water inlet through hole of the water collection chamber frame, or one end connected to the water inlet through hole of the water collection chamber frame and the other end connected to the inner side of the annular groove of the pressure plate frame. A water passage hole with a diameter of 5 mm to 15 mm is set at intervals of 5 mm to 10 mm on the water pipe; the inter-diaphragm pressure ring is 3 mm to 10 mm thick and is set between the water outlet holes of two diaphragm units, with a perforated tube through hole in the middle, and annular grooves are set on both sides of the perforated tube through hole, with a sealing ring set in the annular groove; the screw collar is 3 mm to 10 mm thick and is set between the water collection chamber frame and the diaphragm unit, or the diaphragm unit and the pressure plate frame, or the through hole of two diaphragm units, with a through hole of the through screw in the middle; the screw rod passes through the through hole of one water collection chamber frame, diaphragm unit, screw collar and pressure plate frame or another water collection chamber frame, and the nut is set on the screw rod on the outside of the water collection chamber frame or pressure plate frame.

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