Novel underwater plate membrane filtering device for automatically sampling water quality

Abstract

The utility model discloses a novel underwater plate membrane filtering device for automatically sampling water quality. The novel underwater plate membrane filtering device comprises a fixed plate, a plate-type membrane, a sampling pipe, a perforated aeration pipe, an aeration pipe fixing piece, an aeration air supply pipe, a connecting screw rod, a fixing nut and a device connecting chain, the plate-type membrane is connected and fixed with the fixing plate through the connecting screw rod and the fixing nut, the perforated aeration pipe is connected and fixed with the bottom end of the fixing plate through the aeration pipe fixing piece, the aeration air supply pipe penetrates through the fixing plate and is connected with the perforated aeration pipe to supply air, the sampling pipe is connected with a water outlet pipe of the plate-type membrane, and the device connecting chain is connected with a reserved hole in the upper end of the fixing plate. The device is arranged underwater through the connecting chain and swings along with water flow, hydraulic cleaning of the membrane is achieved, meanwhile, aeration is conducted through the perforated aeration pipe, and aeration purging of the membrane is achieved. The underwater plate membrane filtering device has the characteristics of simple structure, light weight, flexibility in installation, convenience in maintenance and long continuous operation time, and can be used for automatic sampling.

Description

Technical Field

[0001] This utility model relates to the field of water quality testing sample pretreatment in sewage treatment, and in particular to an underwater membrane filtration device for automatic water quality sampling. Background Technology

[0002] Wastewater treatment plants have complex water quality environments. Apart from the qualified wastewater that is directly discharged into the environment, the water quality environments of most other process units, such as the pretreatment section and the biological treatment section, cannot meet the conditions for direct sampling and testing. The water quality environment of industrial wastewater treatment plants is even more complex.

[0003] Conventional sampling typically involves manual pretreatment, such as gravity sedimentation, flocculation sedimentation to obtain supernatant, and filtration to obtain filtrate. These methods are time-consuming and subject to operational conditions, making them suitable only for manual water quality sampling and testing and unable to meet the needs of continuous automatic water quality sampling and testing.

[0004] Automatic water quality sampling also employs plate membrane pretreatment methods: some use a pretreatment water tank, pumping water samples from the corresponding points into the tank via a submersible pump, and then filtering and sampling through plate membranes fixed in the tank; others use a membrane frame, installing a fixed bracket at the sampling point, connecting the membrane frame with the fixed plate membrane to the bracket for support, so that the membrane is immersed underwater for direct filtration and sampling.

[0005] Most membrane filtration devices are not compact and streamlined in structure, requiring additional pretreatment equipment such as custom-made water tanks, membrane frames, and mounting brackets. Furthermore, they often fail to adequately address membrane fouling issues that occur during long-term sampling operations. These issues result in bulky equipment, inflexible installation, short continuous operating time, and inconvenient maintenance. Utility Model Content

[0006] The purpose of this utility model is to provide a novel underwater membrane filtration device for automatic water quality sampling, which is compatible with the automatic water quality sampling equipment that requires filtration and sampling, and solves the problems of redundant additional accessories, inflexible implementation and installation, inconvenient maintenance and insufficient continuous operation efficiency of conventional underwater membrane filtration devices.

[0007] Therefore, this utility model provides a novel underwater plate membrane filtration device for automatic water quality sampling, including a fixed plate, a plate membrane, a sampling tube, a perforated aeration tube, an aeration tube fixing component, an aeration supply tube, a connecting screw, a fixing nut, and a device connecting chain. The plate membrane is connected to and fixed in position to the fixed plate through the connecting screw and the fixing nut. The aeration supply tube passes through the fixed plate and is connected to the perforated aeration tube to supply air. The perforated aeration tube is connected to and fixed to the bottom end of the fixed plate through the aeration tube fixing component. The sampling tube is connected to the water outlet pipe of the plate membrane. The device connecting chain is connected to a pre-drilled hole at the upper end of the fixed plate.

[0008] Furthermore, the plate-type diaphragm is provided with openings at its four corners, and the fixing plate is also provided with openings at its corresponding four corners. The two are then connected and fixed by the connecting screw and the fixing nut.

[0009] Furthermore, threads are rolled at both ends of the central axis of the connecting screw, and are positioned opposite to the fixed position of the fixed plate.

[0010] Furthermore, the connecting screw is also provided with twisted wires at both ends, and is opposite to the fixed position of the plate diaphragm.

[0011] Furthermore, the upper end of the fixing plate is provided with two openings, and the openings at the upper end of the fixing plate are connected to the device connecting chain.

[0012] Furthermore, two openings are also provided at the lower end of the fixing plate; the openings at the lower end of the fixing plate are connected to the aeration pipe fixing component and are used to fix the perforated aeration pipe.

[0013] Furthermore, two diaphragms are provided, which are connected and fixed to each other on both sides of the fixing plate.

[0014] Furthermore, a plate-type diaphragm is provided on one side of the fixed plate, and a counterweight plate is provided on the other side of the fixed plate.

[0015] Furthermore, the fixing plate has a hollow tubular structure in the middle for the aeration supply pipe to pass through.

[0016] Compared with the prior art, this utility model has the following technical effects: 1) The device uses a fixed plate as the middle plate, with two plate-type membranes or one plate-type membrane and a counterweight plate connected and fixed on both sides as the main structure. The entire device is connected by a device connecting chain, and the other end is connected to a fixed point on the sampling point's water tank, such as a railing. Alternatively, a connecting bracket can be installed on the tank or expansion bolts can be simply driven in for connection; 2) Based on this design, the device structure is simplified, without extra redundancy, lightweight, flexible in installation, and easy to maintain. At the same time, this design structure allows the device to make full use of water flow underwater to achieve hydraulic cleaning of the membranes; 3) A perforated aeration pipe is installed at the bottom of the fixed plate. Through the aeration supply pipe, it can be connected to the on-site aeration pipeline, such as the aeration pipe of the biological tank, to supply air and achieve aeration and purging of the membranes.

[0017] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0019] Figure 1 This is a front view of a novel underwater membrane filtration device for automatic water sampling according to this utility model.

[0020] Figure 2 This is a side view of a novel underwater membrane filtration device for automatic water sampling according to this utility model;

[0021] Figure 3 This is a side view of a novel underwater plate membrane filtration device for automatic water quality sampling according to another embodiment;

[0022] Explanation of reference numerals in the attached figures

[0023] 1. Fixing plate; 2. Plate diaphragm; 3. Sampling tube; 4. Perforated aeration tube; 5. Aeration tube fixing component; 6. Aeration supply tube; 7. Connecting screw; 8. Fixing nut; 9. Device connecting chain; 10. Counterweight plate. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] like Figures 1-2As shown, a novel underwater plate membrane filtration device for automatic water quality sampling according to this utility model includes: a fixing plate 1, a plate membrane 2, a sampling tube 3, a perforated aeration tube 4, an aeration tube fixing component 5, an aeration supply tube 6, a connecting screw 7, a device connecting chain 9, and several fixing nuts 8.

[0026] The plate-type diaphragm 2 is connected to and fixed in position to the fixed plate 1 via the connecting screw 7 and the fixing nut 8. The aeration supply pipe 6 passes through the fixed plate 1 and is connected to the perforated aeration pipe 4 to supply air. The perforated aeration pipe 4 is connected to and fixed to the bottom end of the fixed plate 1 via the aeration pipe fixing member 5. The sampling pipe 3 is connected to the water outlet pipe of the plate-type diaphragm 2. The device connecting chain 9 is connected to the pre-reserved hole at the upper end of the fixed plate 1.

[0027] Specifically, a fixed plate 1 is located in the middle, and two plate-type membrane sheets 2 are located on both sides of the fixed plate 1. The three plates are centered around each other. Holes are made at the four corners of the plate-type membrane sheets 2, and corresponding holes are made at the four corners of the fixed plate 1. A connecting screw 7 passes through the fixed plate 1 and connects to the plate-type membrane sheet 2 on the other side. Then, a fixing nut 8 is used to fix the fixed plate 1 and the plate-type membrane sheets 2, thus connecting and fixing them. The above-mentioned novel underwater plate membrane filtration device adopts a double-plate membrane design, with the fixed plate 1 as the middle plate and two plate-type membrane sheets 2 connected and fixed on both sides. This balances the weight while improving the sampling throughput.

[0028] The connecting screw 7 is twisted into threads at specific positions, located at both ends of the screw's central axis and at both ends of the fixed position opposite to the plate diaphragm 2. The fixing plate 1 passes through the screw and is placed in the middle, with both ends fixed by fixing nuts 8. The plate diaphragms 2 on both sides pass through the screw and are placed in the required positions, with both ends fixed by fixing nuts 8, forming the main structure of the device.

[0029] like Figure 1 As shown, the four corners of the fixing plate 1 are provided with openings; the two openings at the upper end of the fixing plate 1 are connected to the device connecting chain 9, and the other end of the connecting chain is connected to the sampling point in the water pool by a fixed point, such as a railing, an instrument box bracket, etc. Alternatively, a connecting bracket can be installed in the pool or an expansion bolt can be simply driven in for connection. By controlling the length of the device connecting chain 9, the depth of the device underwater can be changed.

[0030] The two openings at the lower corners of the fixed plate 1 are connected to the aeration pipe fixing component 5, and the perforated aeration pipe 4 is installed at the lower end of the fixed plate through the aeration pipe fixing component 5. The middle of the fixed plate 1 is a hollow tubular structure, and the aeration supply pipe 6 passes through the hollow tubular structure in the middle of the fixed plate 1 and connects to the perforated aeration pipe 4 at the lower end. This avoids the situation where external pipes affect the hydraulic conditions of the device and reduce the hydraulic cleaning effect of the membrane.

[0031] The aeration supply pipe 6 can be connected to on-site aeration pipelines, such as the aeration pipes of the biological treatment tank, for air supply, or it can be used with a small aeration device. By connecting to the aeration supply pipe 6, air supply is provided for aeration purging, reducing the degree of membrane fouling during the operation of the device.

[0032] In another embodiment, where a high sampling flux is not required, one of the plate membranes 2 in the underwater plate membrane filter is replaced by a counterweight plate 10, while the other plate membrane 2 is retained. One plate membrane 2 is installed on one side of the fixing plate 1, and the counterweight plate 10 is installed on the other side of the fixing plate 1. The filter is still locked and fixed by the connecting screw 7 and the fixing nut 8.

[0033] The above-mentioned novel underwater plate membrane filtration device is designed with two plate membranes 2 or one plate membrane 2 and one counterweight plate 10 fixed on both sides of the fixed plate 1. The entire device is balanced in weight and is connected to the fixed plate 1 by the device connecting chain 9. The other end is fixed to a fixed point on the pool. The device is pulled underwater at the sampling point and swings with the direction of water flow to make full use of the water force to clean the membrane. Combined with aeration and blowing, the degree of membrane fouling is further reduced.

[0034] This device solves the problems of redundant components, complex structure, large size and weight, inflexible installation, insufficient efficiency during continuous operation, and inconvenient maintenance in conventional membrane filtration pretreatment units. For example, it addresses issues such as the configuration of a pretreatment water tank and submersible pump, and the installation of fixed brackets and membrane frames. This device is compatible with automatic water quality sampling equipment that uses membrane filtration pretreatment; alternatively, sampling components, such as peristaltic pumps, can be added to provide a negative pressure environment for membrane operation. Based on a simple time-controlled switch, automatic membrane filtration pretreatment sampling can then be achieved.

[0035] The following is an example illustrating the combined use of this device: This device can be adapted to an automatic water quality sampling device that uses membrane filtration pretreatment. Simply connect the sampling tube of this device to the sampling tube of the automatic water quality sampling device.

[0036] This device can also be configured with sampling components, requiring only simple parts to achieve its functions. These include a control box housing the sampling device, containing sampling units such as a peristaltic pump and a stepper motor, and a control unit such as a timer switch. The stepper motor drives the peristaltic pump, which, through a sampling tube, provides a negative pressure environment for the plate membrane. The timer switch controls the power supply to the stepper motor, thus enabling automatic collection of membrane-treated water samples at fixed time points and for fixed running times. Combined with the necessary online monitoring equipment, this allows for the automatic detection of water quality indicators in the samples.

[0037] The above description is merely an embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel underwater plate membrane filtration device for automatic water quality sampling, characterized in that, It includes a fixing plate (1), a plate diaphragm (2), a sampling tube (3), a perforated aeration tube (4), an aeration tube fixing component (5), an aeration supply tube (6), a connecting screw (7), a fixing nut (8), and a device connecting chain (9). The plate diaphragm (2) is connected to and fixed to the fixed plate (1) via the connecting screw (7) and fixing nut (8). The aeration supply pipe (6) passes through the fixed plate (1) and is connected to the perforated aeration pipe (4) to supply air. The perforated aeration pipe (4) is connected to and fixed to the bottom end of the fixed plate (1) via the aeration pipe fixing piece (5). The sampling pipe (3) is connected to the outlet pipe of the plate diaphragm (2). The device connecting chain (9) is connected to the pre-reserved hole at the upper end of the fixed plate (1).

2. The novel underwater plate membrane filtration device for automatic water sampling according to claim 1, characterized in that, The plate diaphragm (2) has openings at its four corners, and the fixing plate (1) also has openings at its four corners. The two are then connected and fixed by the connecting screw (7) and the fixing nut (8).

3. A novel underwater plate membrane filtration device for automatic water sampling according to claim 1, characterized in that, The connecting screw (7) is twisted at both ends of its central axis and is positioned opposite to the fixed position of the fixing plate (1).

4. A novel underwater plate membrane filtration device for automatic water sampling according to claim 3, characterized in that, The connecting screw (7) is also provided with twisted wires at both ends, and is opposite to the fixed position of the plate diaphragm (2).

5. A novel underwater plate membrane filtration device for automatic water sampling according to claim 1, characterized in that, The upper end of the fixing plate (1) is provided with two openings, and the openings at the upper end of the fixing plate (1) are connected to the device connecting chain (9).

6. A novel underwater plate membrane filtration device for automatic water quality sampling according to claim 5, characterized in that, The lower end of the fixing plate (1) is also provided with two openings; the openings at the lower end of the fixing plate (1) are connected to the aeration pipe fixing component (5) and are used to fix the perforated aeration pipe (4).

7. A novel underwater plate membrane filtration device for automatic water sampling according to claim 1, characterized in that, The plate-type diaphragm (2) consists of two pieces, which are connected and fixed to each other on both sides of the fixing plate (1).

8. A novel underwater plate membrane filtration device for automatic water sampling according to claim 7, characterized in that, The plate diaphragm (2) is provided on one side of the fixed plate (1), and the counterweight plate (10) is provided on the other side of the fixed plate (1).

9. A novel underwater plate membrane filtration device for automatic water sampling according to claim 1, characterized in that, The fixing plate (1) is hollow in the middle and is used to pass through the aeration supply pipe (6).

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