Back pressure quick filtration type sewage purification device

Abstract

The utility model discloses a back pressure quick filtration type sewage purification device which comprises a shell with an opening in the upper end and an upper sealing cover arranged at the upper end of the shell in a covering mode, a water inlet is formed in the bottom of the shell and connected with a low-pressure aerobic water inlet pipeline, and a water outlet pipeline is connected to the upper sealing cover; an inner pressure bin with an opening in the upper end is arranged in the shell, and a gap for sewage to pass through is reserved between the outer wall of the inner pressure bin and the inner wall of the shell; a sewage purification membrane wire is arranged in the inner pressure bin; a flow shielding plate is arranged in the shell and obliquely arranged on the top of the shell, the high end of the flow shielding plate is fixed to the shell, and the low end of the flow shielding plate extends to the top of the inner pressure bin and is higher than the inner pressure bin. By adopting a low-pressure aerobic reflux type filtering and purifying technology, the device can work in a state of low energy consumption, high effluent quality and complete autonomous control operation.

Description

Technical Field

[0001] The present application relates to the technical field of sewage purification, and in particular to a back-pressure rapid filtration sewage purification device. Background Art

[0002] Traditional membrane separation and purification primarily utilizes the activated sludge process, operating within a MLSS concentration range of 3,000-12,000 mg / L. The sludge concentration primarily affects the membrane module's filtration and water production flux through viscosity. Excessively high concentrations increase the viscosity of the wastewater mixture, leading to a decrease in the membrane's filtration and water production flux. Maintaining normal filtration and water production flux is not only limited by temperature and MLSS concentration, but also significantly increases energy consumption. Utility Model Content

[0003] To this end, the present application provides a back-pressure rapid filtration type sewage purification device to solve the problems in the prior art that the filtration water flux is greatly limited by temperature and sludge concentration, as well as the high energy consumption.

[0004] In order to achieve the above objectives, this application provides the following technical solutions:

[0005] A back-pressure rapid filtration type sewage purification device comprises a housing with an upper opening and an upper cover provided on the upper end of the housing, a water inlet is provided at the bottom of the housing, the water inlet is connected to a low-pressure aerobic water inlet pipe, and the upper cover is connected to a water outlet pipe;

[0006] An internal pressure chamber with an open upper end is provided inside the outer shell, and a gap is left between the outer wall of the internal pressure chamber and the inner wall of the outer shell for sewage to pass through; sewage purification membrane fibers are provided in the internal pressure chamber; a flow shielding plate is provided inside the outer shell, and the flow shielding plate is obliquely arranged at the top of the outer shell, with the high end fixed on the outer shell and the low end extending to the top of the internal pressure chamber and higher than the internal pressure chamber.

[0007] Optionally, a sealing copy forest is provided between the upper cover and the upper end of the shell, and the top of the sewage purification membrane filament is fixed on the sealing copy forest.

[0008] Optionally, the sewage purification membrane wire is provided with multiple layers along the radial direction of the inner pressure chamber.

[0009] Optionally, a spoiler is connected between the outer wall of the internal pressure chamber and the inner wall of the outer shell. The spoiler is arranged obliquely, with the lower end connected to the internal pressure chamber and the higher end connected to the outer shell.

[0010] Optionally, the bottom of the internal pressure chamber is connected to a backwash outlet pipe, the end of the backwash outlet pipe passes through the outer shell and extends outside the outer shell; a backwash outlet gate valve is also provided on the backwash outlet pipe.

[0011] Optionally, a pressure control valve is provided on the upper cover, and a pressure detection couple of the pressure control valve passes through the upper cover and extends into the inner pressure chamber.

[0012] Optionally, the pressure detection couple is located in the middle of the sewage purification membrane wire, and the end portion extends to the bottom of the sewage purification membrane wire.

[0013] Optionally, a drain valve is provided at the bottom of the shell.

[0014] Optionally, a pressure reducing and exhaust valve is provided on the top of the shell.

[0015] Optionally, the outer shell and the inner pressure chamber are both made of SUS304 stainless steel with a thickness of 2 mm.

[0016] Compared with the prior art, this application has at least the following beneficial effects:

[0017] 1. This device is basically not limited by sludge concentration (MLSS) and water temperature. Since the design of this device fully takes into account the problems existing in traditional processes, it then innovatively adopts a variety of methods such as closed pressure value, mechanical pressure reducing valve, water dissolving pump pressure regulating valve, etc. to effectively control the working water flow pressure and the quality of purified and filtered water. At the same time, it also ensures that this device can operate with low energy consumption, high water quality, and fully autonomous control operation. In addition, no conventional treatment chemicals are required during the sewage treatment process, which further ensures the safety of the effluent water quality. At the same time, the overall operating cost is greatly reduced. The price per ton of water treatment, thus achieving the standard of energy saving and efficiency improvement.

[0018] 2. When the water flow is affected by the flow shielding plate, the direction of the low-pressure water flow is changed, and the water flow continuously flushes the surface of the membrane wire, so that there will be no problem of polluting organic matter adhering to the surface of the purification membrane wire, and the water filtration effect is optimal.

[0019] 3. The spoiler can block some large particles of organic matter in the sewage, and can also enhance the purification effect of the surface of the backflow flushing filter device to ensure that the device can work well and normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more intuitively illustrate the prior art and the present application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be considered as limiting conditions for implementing the present application; for example, based on the technical concepts disclosed in this application and the exemplary drawings, those skilled in the art are capable of easily making routine adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, dimensional ratios, etc. of certain units (components).

[0021] Figure 1This is a schematic structural diagram of a back-pressure rapid filtration sewage purification device provided in an embodiment of the present application.

[0022] Description of reference numerals:

[0023] 1. Outlet pipe; 2. Shielding plate; 3. Sewage purification membrane; 4. Backwash outlet gate valve; 5. Backwash outlet pipe; 6. Water inlet; 7. Low-pressure aerobic water inlet pipe; 8. Drain valve; 9. Spoiler; 10. Internal pressure chamber; 11. Pressure detection thermocouple; 12. Outer casing; 13. Pressure reducing and relief valve; 14. Sealing plate; 15. Upper cover; 16. Pressure controller. DETAILED DESCRIPTION

[0024] The present application will be further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0025] In the description of this application: unless otherwise specified, "a plurality of" means two or more. Expressions such as "include", "comprising", "having" and the like also mean "not limited to" (certain units, components, materials, steps, etc.).

[0026] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this application are usually used to indicate the general relative position relationship for the convenience of intuitive understanding by referring to the drawings, and are not absolute limitations on the position relationship in the actual product.

[0027] A back pressure rapid filtration type sewage purification device, referring to Figure 1 The device comprises a housing 12 with an opening at the top and an upper cover 15 covering the upper end of the housing 12. A water inlet 6 is provided at the bottom of the housing 12, which is connected to a low-pressure aerobic water inlet pipe 7. The water is oxygenated by a dissolved air pump and then enters the purification device at low pressure, thereby placing the sewage in a slightly aerated aerobic state. This has an excellent effect on pre-treating and reducing harmful substances in the sewage.

[0028] An internal pressure chamber 10 with an open upper end is provided inside the outer shell 12 , and a gap for sewage to pass through is left between the outer wall of the internal pressure chamber 10 and the inner wall of the outer shell 12 . Sewage purification membrane fibers 3 are provided in the internal pressure chamber 10 .

[0029] Specifically, the outer shell 12 and the inner pressure chamber 10 are both concave structures with downwardly bent bottoms. Correspondingly, the bottom of the sewage purification membrane filament 3 is also bent downwards to form a U-shaped concave structure.

[0030] Furthermore, in order to improve the purification effect, the sewage purification membrane filaments 3 are provided with multiple layers along the radial direction of the inner pressure chamber 10 .

[0031] In order to improve the sealing performance, a sealing copy forest 14 is provided between the upper cover 15 and the upper end of the shell 12 , and the tops of all the sewage purification membrane fibers 3 are fixed in the middle position of the sealing copy forest 14 .

[0032] The upper cover 15 is connected to an outlet pipe 1, the lower end of which extends into the space between the upper cover 15 and the sealing ring 14, and is located above the internal pressure chamber 10. As the air dissolving pump continuously pumps wastewater into the device, the pressure inside the device increases, and the treated clean water in the internal pressure chamber 10 is squeezed into the outlet pipe 1 under the action of pressure and discharged.

[0033] A baffle 2 is installed inside the housing 12. This baffle 2 is an annular plate with an inclined surface, located at the inner top of the housing 12. Its upper end (i.e., outer edge) is fixed to the housing 12, while its lower end (i.e., inner edge) extends to the top of the internal pressure chamber 10 and is higher than this. Baffle 2 serves as a guide, redirecting the low-pressure flow of wastewater. This water flow continuously re-washes the membrane filaments, preventing the adhesion of contaminants to the purification membrane filaments.

[0034] A spoiler 9 is connected between the outer wall of the inner pressure chamber 10 and the inner wall of the outer shell 12. The spoiler 9 is an inclined annular plate with multiple filter holes. Its lower end (i.e., inner edge) is connected to the inner pressure chamber 10, and its upper end (i.e., outer edge) is connected to the outer shell 12. Multiple spoilers 9 are arranged at intervals along the axial direction to block some large particles of organic matter in the sewage.

[0035] Correspondingly, a drain valve 8 is provided at the bottom of the housing 12. The drain valve 8 is opened to discharge the large organic particles blocked by the spoiler 9 out of the housing 12 to ensure that the device can work properly.

[0036] The device can also be provided with a PLC time integrated control program, which can be used to control the opening and closing of the drain valve 8.

[0037] The bottom of the inner pressure chamber 10 is connected to a backwash outlet pipe 5, and the end of the backwash outlet pipe 5 radially passes through the outer shell 12 and extends outside the outer shell 12. The backwash outlet pipe 5 is also provided with a backwash outlet valve.

[0038] The internal pressure chamber 10 is stabilized inside the outer shell 12 under the joint support of the backwash water outlet pipe 5 and the plurality of spoilers 9 .

[0039] A pressure control valve is provided on the upper cover 15. The pressure detection couple 11 of the pressure control valve passes through the upper cover 15 and extends into the internal pressure chamber 10. It is located in the middle of the innermost layer of the sewage purification membrane filament 3, and its end extends to the bottom of the innermost layer of the sewage purification membrane filament 3, so as to more accurately detect the pressure in the internal pressure chamber 10.

[0040] When the amount of organic contaminants in the internal pressure chamber 10 increases, the internal space decreases and the pressure increases. When the preset pressure relief value is reached, the pressure controller 16 starts to work and opens the backwash outlet valve 4, allowing the organic contaminants in the internal pressure chamber 10 to be discharged to the sewage regulating tank. When the pressure returns to the preset pressure relief value, the pressure controller 16 automatically closes the backwash outlet valve 4. During this process, the purified water output is not affected by the pressure relief.

[0041] In addition, a pressure reducing and exhaust valve 13 is also provided on the top of the housing 12 .

[0042] The outer shell 12 and the inner pressure chamber 10 are both made of SUS304 stainless steel with a thickness of 2 mm. The use of SUS304 stainless steel not only ensures strength and pressure resistance, but also achieves twice the result with half the effort in terms of anti-pollution and corrosion.

[0043] This device can adjust relevant technical parameters according to the water quality of the inlet and outlet water to achieve the best outlet water quality standards. At the same time, the device's treatment energy efficiency can also be adjusted according to the amount of inlet water.

[0044] The technical features of the above embodiments can be combined arbitrarily (as long as there is no contradiction in the combination of these technical features). In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A back-pressure rapid filtration type sewage purification device, characterized in that: The invention comprises a shell (12) with an upper opening and an upper cover (15) provided on the upper end of the shell (12); a water inlet (6) is provided at the bottom of the shell (12); the water inlet (6) is connected to a low-pressure aerobic water inlet pipe (7); and the upper cover (15) is connected to a water outlet pipe (1); An internal pressure chamber (10) with an open upper end is provided inside the outer shell (12), and a gap for sewage to pass through is left between the outer wall of the internal pressure chamber (10) and the inner wall of the outer shell (12); sewage purification membrane fibers (3) are provided inside the internal pressure chamber (10); a flow shielding plate (2) is provided inside the outer shell (12), and the flow shielding plate (2) is tiltedly arranged at the top of the outer shell (12), with the high end fixed on the outer shell (12) and the low end extending to the top of the internal pressure chamber (10) and higher than the internal pressure chamber (10).

2. The back-pressure rapid filtration type sewage purification device according to claim 1, characterized in that: A sealing copy forest (14) is provided between the upper cover (15) and the upper end of the shell (12), and the top of the sewage purification membrane filament (3) is fixed on the sealing copy forest (14).

3. The back-pressure rapid filtration type sewage purification device according to claim 2, characterized in that: The sewage purification membrane fibers (3) are provided with multiple layers along the radial direction of the inner pressure chamber (10).

4. The back-pressure rapid filtration type sewage purification device according to claim 1, characterized in that: A spoiler (9) is connected between the outer wall of the internal pressure chamber (10) and the inner wall of the outer shell (12). The spoiler (9) is arranged obliquely, with the lower end connected to the internal pressure chamber (10) and the upper end connected to the outer shell (12).

5. The back-pressure rapid filtration type sewage purification device according to claim 1, characterized in that: The bottom of the internal pressure chamber (10) is connected to a backwash outlet pipe (5), the end of which passes through the outer shell (12) and extends outside the outer shell (12); a backwash outlet valve is also provided on the backwash outlet pipe (5).

6. The back-pressure rapid filtration type sewage purification device according to claim 5, characterized in that: A pressure control valve is provided on the upper cover (15), and a pressure detection thermocouple (11) of the pressure control valve passes through the upper cover (15) and extends into the inner pressure chamber (10).

7. The back-pressure rapid filtration type sewage purification device according to claim 6, characterized in that: The pressure detection couple (11) is located in the middle of the sewage purification membrane (3), and the end portion extends to the bottom of the sewage purification membrane (3).

8. The back-pressure rapid filtration type sewage purification device according to claim 1, characterized in that: A drain valve (8) is provided at the bottom of the housing (12).

9. The back-pressure rapid filtration type sewage purification device according to claim 1, characterized in that: A pressure relief valve (13) is provided on the top of the housing (12).

10. The back-pressure rapid filtration type sewage purification device according to claim 1, characterized in that: The outer shell (12) and the inner pressure chamber (10) are both made of SUS304 stainless steel material with a thickness of 2 mm.

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