Membrane filtration device and industrial sewage purification and filtration system

Abstract

The utility model discloses a membrane filtration device and industrial sewage purification filtration system, including water inlet pipe, water outlet pipe, concentrated water pipe and a plurality of membrane filtration modules, each membrane filtration module includes water inlet end, water outlet end and concentrated water end, the water inlet end of each membrane filtration module is connected with the water inlet pipe, the water outlet end is connected with the water outlet pipe, the concentrated water end is connected with the concentrated water pipe, and the concentrated water end is connected with the concentrated water pipe. The water inlet pipe is provided with a one-way valve I, the one-way valve I can realize one-way circulation from the water inlet pipe to the water inlet end, and the pressurizing module is communicated with the water inlet end and is used for increasing the water pressure of the water inlet end. According to the utility model, the supercharging device is arranged at the water inlet end of the membrane filtration module, and the water inlet end of each membrane filtration module can be supercharged under the supercharging action of the supercharging module, so that the pressure difference between the water inlet position and the water outlet position of the membrane filtration module can be improved, and the membrane filtration efficiency of sewage can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment equipment, and more specifically, to a membrane filtering device, and also to an industrial sewage purification and filtering system with the membrane filtering device. Background Art

[0002] Sewage membrane filtration is a highly efficient sewage treatment technology. It is based on the principle of membrane filtration and achieves the separation and removal of pollutants in sewage through the selective permeability of the membrane. Sewage membrane filtration mainly uses the pressure difference on both sides of the membrane as the driving force, so that when the raw liquid flows through the membrane surface, only water and small molecules are allowed to pass through the membrane pores to become relatively clean water, while the concentration of the intercepted substances in the raw liquid will gradually increase to form concentrated water, thereby achieving the separation and concentration of the raw liquid.

[0003] The membrane filtration module for sewage has three ports, namely the water inlet, the water outlet and the concentrated water end. The sewage to be filtered is transported along the water inlet pipe and enters from the water inlet of the membrane filtration module. After being filtered by the membrane filtration module, relatively clean water is obtained. The clean water flows out from the water outlet of the membrane filtration module and is transported and discharged along the water outlet pipe; the concentrated water obtained by filtration is output from the concentrated water end of the membrane filtration module and output along the concentrated water pipe. The water inlet is mainly transported by a liquid pump to supply the sewage to be filtered to the inside of the membrane filtration module, but the water supply pressure is relatively low and cannot meet the pressure requirements of the water inlet of the membrane filtration module, which limits the water purification efficiency of the membrane filtration module.

[0004] Therefore, a new solution needs to be proposed to solve this problem. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a membrane filtration device, which can increase the water inlet pressure of the membrane filtration module and improve the efficiency of membrane filtration.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a membrane filtration device, including a water inlet pipe, a water outlet pipe, a concentrated water pipe and a plurality of membrane filtration modules, the membrane filtration modules including a water inlet end, a water outlet end and a concentrated water end, the water inlet end of each membrane filtration module is connected to the water inlet pipe, the water outlet end is connected to the water outlet pipe, and the concentrated water end is connected to the concentrated water pipe, the water inlet pipe is installed with a one-way valve, the one-way valve can flow unidirectionally from the water inlet pipe to the water inlet end, and also includes a boosting module, the boosting module is connected to the water inlet end, and is used to increase the water pressure at the water inlet end.

[0007] The utility model is further configured to include a second one-way valve and a third one-way valve, wherein the second one-way valve is installed on the water outlet pipe, and the second one-way valve can flow one-way from the water outlet end to the water outlet pipe; the third one-way valve is installed on the concentrated water pipe, and the third one-way valve can flow one-way from the concentrated water end to the concentrated water pipe.

[0008] The utility model is further configured as follows: the boosting module includes a boosting cylinder, a boosting piston is arranged in the boosting cylinder, the boosting piston is connected to the piston in the inner cavity of the boosting cylinder, one side of the boosting piston forms a chamber one, a connecting hole one is opened at the end of the boosting cylinder, the connecting hole one is connected to the chamber one, and the connecting hole one is connected to the water inlet end of the membrane filtration module.

[0009] The utility model is further configured that the boosting module also includes a piston rod, the piston rod is connected to the boosting piston, both ends of the piston rod penetrate the boosting cylinder and extend out of the boosting cylinder; the piston rod and the boosting cylinder are slidably sealed by a sealing member.

[0010] The utility model is further configured that the boost module also includes a driver, and the driver is used for driving the piston rod to extend and retract.

[0011] The utility model is further configured that the booster piston comprises two piston blocks, a hole is opened in the middle of the piston block, the piston rod passes through the hole of the piston block and is slidably sealed by a sealing sleeve; the outer periphery of the piston block is connected to the inner periphery of the booster cylinder piston;

[0012] The utility model is further configured that two stoppers are fixedly connected to the outer periphery of the piston rod, the two stoppers are respectively located on the outsides of the two piston blocks, the stoppers are used to abut against the piston blocks to limit the pressure of the piston blocks; a spring is elastically pressed between the two piston blocks.

[0013] The utility model is further configured that a second stopper is fixedly connected to the outer periphery of the piston rod, and the stopper is located at the inner side of the two piston blocks. The second stopper is used to abut against the piston blocks to limit the piston blocks.

[0014] The utility model is further configured such that an air guide channel is provided inside the piston rod, a through hole is opened on the outer periphery of the second stopper, one end of the air guide channel is connected to the through hole, and the other end extends to the outside of the booster cylinder and is connected to an external high-pressure air source.

[0015] The utility model is further configured such that a second chamber is formed on the other side of the boosting piston, and the first chamber and the second chamber are respectively located on both sides of the boosting piston and are separated from each other; a second connecting hole is provided at the end of the boosting cylinder, and the second connecting hole is connected to the second chamber, and the second connecting hole is connected to the water outlet pipe.

[0016] The utility model also provides an industrial sewage purification and filtering system, comprising the membrane filtering device as mentioned above, through which sewage is filtered and water is filtered and purified.

[0017] In summary, the utility model has the following beneficial effects:

[0018] The sewage can be filtered and treated simultaneously by multiple groups of membrane filtration modules, and multiple groups of parallel membrane filtration modules can be added to increase the filtration area of ​​the entire device, thereby improving the efficiency of sewage filtration;

[0019] By arranging a booster device at the water inlet end of the membrane filtration module, the water inlet end of each membrane filtration module can be pressurized under the boosting effect of the booster module, thereby increasing the pressure difference between the water inlet and water outlet of the membrane filtration module, thereby increasing the membrane filtration efficiency of the sewage;

[0020] By setting a one-way valve at the water inlet pipe, the water flow direction between the water inlet pipe and the membrane filtration module can be controlled to avoid the backflow of sewage and ensure that the membrane filtration module can achieve smooth and stable filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a membrane filtration device in this embodiment;

[0022] Figure 2 The structure of the boost module in this embodiment is shown in FIG. Figure 1 ;

[0023] Figure 3 The structure of the boost module in this embodiment is shown in FIG. Figure 2 .

[0024] Figure numerals: 1. membrane filtration module; 11. water inlet end; 12. water outlet end; 13. concentrate water end; 2. water inlet pipe; 21. one-way valve one; 3. water outlet pipe; 31. one-way valve two; 4. concentrate water pipe; 41. one-way valve three; 5. boosting module; 50. boosting cylinder; 511. chamber one; 512. chamber two; 52. boosting piston; 53. connecting hole one; 54. connecting hole two; 55. piston rod; 56. sealing element; 521. piston block; 522. block one; 523. block two; 524. through hole; 525. air guide channel; 526. spring; 527. ring groove; 528. sealing sleeve. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] This embodiment discloses a membrane filtration device, referring to Figure 1 , Figure 2As shown, it includes an inlet pipe 2, an outlet pipe 3, a concentrated water pipe 4 and a plurality of membrane filtration modules 1, wherein the membrane filtration module 1 performs membrane filtration treatment on the sewage, and filters the sewage through the membrane material inside it, and performs filtering and purification treatment on the water;

[0027] The membrane filtration module 1 has three ports, namely, an inlet end 11 , an outlet end 12 and a concentrate end 13 . The inlet end 11 of each membrane filtration module 1 is connected to the inlet pipe 2 , the outlet end 12 is connected to the outlet pipe 3 , and the concentrate end 13 is connected to the concentrate pipe 4 .

[0028] The sewage to be filtered is transported along the water inlet pipe 2 and enters from the water inlet end 11 of the membrane filtration module 1. Relatively clean water is obtained after filtration treatment by the membrane filtration module 1. The clean water flows out from the water outlet end 12 of the membrane filtration module 1 and is transported and discharged along the water outlet pipe 3; the concentrated water obtained by filtration is output from the concentrated water end 13 of the membrane filtration module 1 and output along the concentrated water pipe 4.

[0029] A one-way valve 21 is installed on the water inlet pipe 2. The one-way valve 21 can allow one-way flow from the water inlet pipe 2 to the water inlet end 11, and the water inlet pipe 2 of each membrane filtration module 1 is located at the downstream position of the water inlet pipe 2. The one-way valve 21 is used for one-way flow guidance to avoid the backflow of sewage.

[0030] In addition, the membrane filtration device also includes a one-way valve 2 31 and a one-way valve 3 41, wherein the one-way valve 2 31 is installed on the water outlet pipe 3, and the one-way valve 2 31 can flow unidirectionally from the water outlet end 12 to the water outlet pipe 3; the one-way valve 3 41 is installed on the concentrated water pipe 4, and the one-way valve 3 41 can flow unidirectionally from the concentrated water end 13 to the concentrated water pipe 4.

[0031] Since the water inlet end 11 of the membrane filtration module 1 needs to have a relatively large water inlet pressure, the sewage can smoothly pass through the membrane filtration module 1, thereby improving the efficiency of the filtration treatment.

[0032] The membrane filtration device also includes a boosting module 5, which is connected to the water inlet end 11 to increase the water pressure at the water inlet end 11; and the boosting module 5 is located downstream of the water inlet pipe 2. Through the boosting effect of the boosting module 5, the water inlet end 11 of each membrane filtration module 1 can be pressurized.

[0033] Reference Figure 2 As shown, the boosting module 5 includes a boosting cylinder 50, in which a boosting piston 52 is arranged, and the boosting piston 52 is connected to the inner piston of the boosting cylinder 50, and the inner cavity of the boosting cylinder 50 is divided into two chambers by the boosting piston 52, one side is chamber 1 511, and the other side is chamber 2 512. Among them, a connecting hole 1 53 is provided at the end of the boosting cylinder 50, and the connecting hole 1 53 is connected to the chamber 1 511, and the connecting hole 1 53 is connected to the water inlet end 11 of the membrane filtration module 1.

[0034] The boosting module 5 further includes a piston rod 55, which is connected to the boosting piston 52, and both ends of the piston rod 55 penetrate the boosting cylinder 50 and extend out of the boosting cylinder 50. The piston rod 55 and the boosting cylinder 50 are slidably sealed by a seal 56, and the seal 56 can keep the piston rod 55 and the boosting cylinder 50 sealed to each other.

[0035] In order to realize the movement of the piston rod 55 and the piston booster 52, the booster module 5 also includes a driver, which is an electric telescopic rod. The movable end of the electric telescopic rod is connected to the piston rod 55, and then the piston rod 55 and the piston booster can be driven by the driver, and then the piston booster moves in the booster cylinder 50 to adjust the volume of the chamber 1 511 in the booster cylinder 50. By squeezing and pressurizing the chamber 1 511, the pressure of the water inlet end 11 can be increased, and since a one-way valve 1 21 is installed at the water inlet pipe 2, the backflow of sewage can be avoided. After the water pressure at the water inlet end 11 is increased, the membrane filtration module 1 can be pressurized, the water flow in the membrane filtration module 1 is accelerated, the water flow is increased, and the water purification rate is improved.

[0036] By adjusting the boosting piston 52 through the driver, the volume of the chamber 511 in the boosting cylinder 50 is increased, thereby reducing the pressure in the chamber 511, so that the water flow in the water inlet pipe 2 can be sucked in, and the sewage passes through the one-way valve 21 of the water inlet pipe 2; then, when the chamber 511 of the boosting cylinder 50 is pressurized, the water inlet end 11 of the membrane filtration module 1 can be pressurized, so that the membrane filtration module 1 can have a larger internal pressure, which is conducive to the smooth and efficient water purification of the membrane filtration module 1.

[0037] Reference Figure 2 As shown, a second chamber 512 is formed on the other side of the boosting piston 52, and the first chamber 511 and the second chamber 512 in the boosting cylinder 50 are respectively located on both sides of the boosting piston 52 and are separated from each other. A second connecting hole 54 is provided at the end of the boosting cylinder 50, and the second connecting hole 54 is connected to the second chamber 512, and the second connecting hole 54 is connected to the water outlet pipe 3. In addition, the position where the second chamber 512 of the boosting cylinder 50 is connected is located downstream of the one-way valve 3 41 of the water outlet pipe 3.

[0038] In the boost cylinder 50, when the boost piston 52 increases the pressure in chamber 1 511 (i.e., when it increases the pressure inlet end 11 of the membrane filtration module 1), the pressure inside chamber 2 512 will decrease accordingly, thereby reducing the pressure at the concentrated water end 13 of the membrane filtration module 1, which can help increase the pressure difference between the water inlet end 11 and the water outlet end 12 of the membrane filtration module 1, thereby facilitating the sewage to pass through the membrane filtration module 1 and achieve more efficient filtration.

[0039] Furthermore, in this embodiment, the boosting piston 52 may adopt an elastically floating structure, thereby avoiding the adverse effects of the internal pressure bump of the membrane filtration module 1 and forming a certain buffering effect.

[0040] Reference Figure 3 As shown, the booster piston 52 includes two piston blocks 521, a hole is opened in the middle of the piston block 521, and the piston rod 55 passes through the hole of the piston block 521 and is slidably sealed by a sealing sleeve 528. The outer periphery of the piston block 521 is connected to the inner periphery of the booster cylinder 50.

[0041] A buffer air chamber is formed between the two piston blocks 521, and buffering is achieved by the change in the internal pressure of the buffer air chamber. In addition, two stoppers 522 are fixedly connected to the outer periphery of the piston rod 55, and the two stoppers 522 are respectively located on the outer sides of the two piston blocks 521. The stoppers 522 can abut against the piston blocks 521 to limit the piston blocks 521.

[0042] A spring 526 is installed between the two piston blocks 521, and the two ends of the spring 526 are elastically pressed against the end faces of the piston blocks 521. The elastic force of the spring 526 can press the two piston blocks 521 against the stopper 522, keeping the position of the piston blocks 521 in a relatively stable state. An annular groove 527 is provided at the end face of the piston block 521, and the end of the spring 526 is embedded in the annular groove 527, which can limit the spring 526 and keep the position of the spring 526 stable.

[0043] In addition, a second stopper 523 is fixedly connected to the outer periphery of the piston rod 55, and the stopper is located on the inner side of the two piston blocks 521. The second stopper 523 can abut against the piston block 521 to limit the pressure of the piston block 521, so that the piston block 521 can only move and adjust within the range between the first stopper 522 and the second stopper 523.

[0044] When the driver drives the piston rod 55 to move, the piston rod 55 drives the piston block 521 to move, thereby increasing the pressure of the chamber 1 511. During the pressurization process, the pressure in the chamber 1 511 increases. When the pressure in the chamber 1 511 is greater than the elastic force of the spring 526 and the internal pressure of the buffer air cavity, it means that the pressure in the chamber 1 511 (i.e., the pressure at the water inlet end 11) is already relatively large. If the piston rod 55 is further pushed, the piston block 521 close to the side of the chamber 1 511 will be pushed, pushing the elastic floating of the piston block 521 to play a role in pressure buffering.

[0045] In addition, an air guide channel 525 is provided in the piston rod 55, and the air guide channel 525 is provided along the length direction of the piston rod 55 and extends to the end position of one side of the piston rod 55. A through hole 524 is provided on the outer periphery of the second stopper 523, one end of the air guide channel 525 is connected to the through hole 524, and the other end extends to the outside of the booster cylinder 50 and is connected to the external high-pressure gas source. Through the air guide channel 525, the buffer air cavity between the two piston blocks 521 can be connected to the external air pressure source, and then the internal pressure of the air guide channel 525 can be adjusted, and then the parameters of the elastic floating of the piston block 521 can be adjusted.

[0046] This embodiment also discloses an industrial wastewater purification and filtration system, including a membrane filtration device as in the above embodiment, through which the wastewater is filtered and the water is filtered and purified.

[0047] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A membrane filtration device, characterized in that: The invention comprises a water inlet pipe (2), a water outlet pipe (3), a concentrated water pipe (4) and a plurality of membrane filtration modules (1), wherein the membrane filtration modules (1) comprise a water inlet end (11), a water outlet end (12) and a concentrated water end (13), wherein the water inlet end (11) of each membrane filtration module (1) is connected to the water inlet pipe (2), the water outlet end (12) is connected to the water outlet pipe (3), and the concentrated water end (13) is connected to the concentrated water pipe (4), wherein the water inlet pipe (2) is provided with a one-way valve (21), wherein the one-way valve (21) can allow one-way flow from the water inlet pipe (2) to the water inlet end (11), and further comprises a boosting module (5), wherein the boosting module (5) is connected to the water inlet end (11) and is used to increase the water pressure at the water inlet end (11).

2. A membrane filtration device according to claim 1, characterized in that: It also comprises a second one-way valve (31) and a third one-way valve (41), wherein the second one-way valve (31) is installed on the water outlet pipe (3), and the second one-way valve (31) can allow one-way flow from the water outlet end (12) to the water outlet pipe (3); and the third one-way valve (41) is installed on the concentrated water pipe (4), and the third one-way valve (41) can allow one-way flow from the concentrated water end (13) to the concentrated water pipe (4).

3. A membrane filtration device according to claim 1, characterized in that: The boosting module (5) comprises a boosting cylinder (50), a boosting piston (52) is arranged in the boosting cylinder (50), the boosting piston (52) is connected to the inner piston of the boosting cylinder (50), one side of the boosting piston (52) forms a chamber one (511), and a connecting hole one (53) is provided at the end of the boosting cylinder (50), the connecting hole one (53) is connected to the chamber one (511), and the connecting hole one (53) is connected to the water inlet end (11) of the membrane filtration module (1).

4. A membrane filtration device according to claim 3, characterized in that: The boost module (5) further comprises a piston rod (55), wherein the piston rod (55) is connected to the boost piston (52), and both ends of the piston rod (55) pass through the boost cylinder (50) and extend out of the boost cylinder (50); a sealing member (56) is used for sliding sealing between the piston rod (55) and the boost cylinder (50).

5. A membrane filtration device according to claim 4, characterized in that: The boost module (5) further comprises a driver, which is used to drive the piston rod (55) to move in a telescopic manner.

6. A membrane filtration device according to claim 4, characterized in that: The boosting piston (52) comprises two piston blocks (521), a hole is provided in the middle of the piston block (521), the piston rod (55) passes through the hole of the piston block (521) and is slidably sealed by a sealing sleeve (528); the outer periphery of the piston block (521) is connected to the inner periphery of the boosting cylinder (50); Two stoppers (522) are fixedly connected to the outer periphery of the piston rod (55). The two stoppers (522) are respectively located on the outer sides of the two piston blocks (521). The stoppers (522) are used to abut against the piston blocks (521) to limit the piston blocks (521). A spring (526) is elastically pressed between the two piston blocks (521).

7. A membrane filtration device according to claim 6, characterized in that: The outer periphery of the piston rod (55) is fixedly connected with a second stopper (523), and the stopper is located on the inner side of the two piston blocks (521). The second stopper (523) is used to abut against the piston block (521) to limit the piston block (521).

8. A membrane filtration device according to claim 7, characterized in that: The piston rod (55) is provided with an air guide channel (525), and the outer periphery of the second stopper (523) is provided with a through hole (524). One end of the air guide channel (525) is connected to the through hole (524), and the other end extends to the outside of the booster cylinder (50) and is connected to an external high-pressure air source.

9. A membrane filtration device according to claim 3, characterized in that: A second chamber (512) is formed on the other side of the boosting piston (52), and the first chamber (511) and the second chamber (512) are respectively located on both sides of the boosting piston (52) and are separated from each other; a second connection hole (54) is provided at the end of the boosting cylinder (50), and the second connection hole (54) is connected to the second chamber (512), and the second connection hole (54) is connected to the water outlet pipe (3).

10. An industrial wastewater purification and filtration system, characterized in that: It comprises the membrane filtration device as described in any one of claims 1 to 9.

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