A high-efficiency wastewater treatment device employing multi-stage filtration

Abstract

This invention discloses a high-efficiency wastewater treatment device employing multi-stage filtration, comprising multi-stage series filter cartridges, filter channels, and backwash channels. Each filter cartridge contains a filter media module and an extrusion module. The filter media module consists of several separate units, and the extrusion module drives these units to move closer or further apart. Both the filter channels and the backwash channels pass through the filter media module. During filtration, the separate units of the filter media module move closer together; during deep backwashing, they move further apart. This invention adjusts the gaps between the filter media modules to accommodate different operating modes, including filtration and backwashing. In filtration mode, extrusion reduces the gaps between the filter media modules, while in backwashing mode, extrusion increases the gaps, thereby improving both filtration and backwashing efficiency.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a high-efficiency wastewater treatment device employing multi-stage filtration. Background Technology

[0002] In the existing technology, multi-stage filters are usually used for preliminary filtration in the pretreatment of sewage. The filtration efficiency of the filter is determined by the state of the filter media. Usually, a separate backwashing system is installed to backwash the filter media regularly to prevent the filter media from becoming saturated. In order to improve the efficiency and effect of backwashing, high-pressure media are usually used for backwashing, or the filter media is directly extracted from the filter for backwashing. This application proposes a new filtration device to improve filtration efficiency, backwashing efficiency and effect. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a high-efficiency wastewater treatment device employing multi-stage filtration.

[0004] This invention provides the following technical solution: A high-efficiency wastewater treatment device employing multi-stage filtration includes multiple filter cartridges connected in series. Filter cartridges are equipped with filter media modules and extrusion modules. Each filter media module consists of several separate units. The extrusion module is used to drive the separate units of the filter media module to move away from or closer to each other. It also includes a filter channel and a backwash channel, both of which are connected to a filter media module; When filtration is performed, the individual units of the filter media module move closer to each other; During deep backwashing, the individual units of the filter media module are moved away from each other.

[0005] Preferably, the upper flange is a rotatable structure, the bottom of the filter column is rotatably connected to the lower flange, and a gear is coaxially mounted on the bottom of the filter column. The gears connecting adjacent filter columns mesh with each other, and a drive component is also included for driving one of the gears to rotate.

[0006] Preferably, a backwash pipe is installed in the middle of the filter cylinder. When the filter column is twisted to its limit, it surrounds the backwash pipe in the circumference, and a valve is opened on the backwash pipe at the position where the filter column is twisted and surrounded.

[0007] Preferably, the filter media module has a fan-shaped cross-section for its split unit filter column. A straight groove is provided on the upper flange, which extends radially. A rotary cutting groove is provided on the lower flange, which is rotatable. One end of the filter column is accommodated in the straight groove via a connecting shaft, and the other end is accommodated in the rotary cutting groove via a connecting shaft. The rotary cutting groove and the straight groove form a kinematic pair, which causes the filter column to move in a centered closing or outward spreading motion when the lower flange rotates.

[0008] Preferably, the filter channel passes through the middle of the upper flange platform and through the middle of the lower flange platform; the backwash channel is circumferentially between the upper flange platform and the lower flange platform, running from one side of the circumferential direction to the other side.

[0009] Compared with the prior art, the present invention provides a high-efficiency sewage treatment device that adopts multi-stage filtration. By adjusting the gap of the filter media module, it can cope with different working modes, including filtration mode and backwashing mode. That is, in filtration mode, the gap of the filter media module is made smaller by compression, and in backwashing mode, the gap of the filter media module is made larger, thereby improving filtration efficiency and backwashing efficiency. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the filter media module structure according to Embodiment 1 of the present invention; Figure 3 This is a top view schematic diagram of the filter media module structure according to Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the backwash pipe structure according to Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the filter media module structure according to Embodiment 2 of the present invention; Figure 6 This is a schematic diagram of the filter column structure according to Embodiment 2 of the present invention; Figure 7 This is a schematic diagram of the operation of the filter media module in Embodiment 2 of the present invention. Detailed Implementation

[0011] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0012] Please refer to the figure, which illustrates a high-efficiency wastewater treatment device employing multi-stage filtration. The inventive concept of this application lies in adjusting the gaps between the filter media to accommodate different operating modes of the wastewater treatment device, namely filtration mode and backwashing mode. In filtration mode, the filter media gaps are required to be tight to retain as many impurities as possible in the wastewater. Conversely, in backwashing mode, the filter media needs to be less dense so that the backwashing medium can carry away the impurities. Specifically, it includes a multi-stage series filter cylinder 2, which houses a filter media module and an extrusion module. The filter media module consists of several separate units, and the extrusion module drives the separate units of the filter media module to move away from or closer to each other. It also includes a filter channel and a backwash channel, both of which are connected to a filter media module; When filtration is performed, the individual units of the filter media module move closer to each other; During deep backwashing, the individual units of the filter media module are moved away from each other.

[0013] Based on the above-described inventive concept, this application provides the following two representative embodiments: Example 1

[0014] Reference Figures 1 to 3 As shown, the filter media module consists of a cylindrical filter column 23, which is arranged around the inner circumference of the filter cylinder 2. The middle part is a rubber column, and the filter media, such as sponge or other polymer materials, is fixed around the column. It is a compressible and flexible filter media with a certain degree of elasticity.

[0015] The extrusion module includes an upper flange 21 installed at the top of the filter column 23 and a lower flange 22 installed at the bottom of the filter column 23. Of the upper flange platform 21 and the lower flange platform 22, one is a rotatable structure and the other is a fixed structure.

[0016] like Figure 2 as well as Figure 3 As shown, when the upper flange 21 rotates, one end of the filter column 23 twists, causing the middle parts of the filter column 23 to be squeezed together. This state is maintained during filtration operation. During backwashing, it returns to its original state, i.e., all the filter columns 23 remain in a circular array within the two flanges.

[0017] Furthermore, the bottom of the filter column 23 is rotatably connected to the lower flange 22, and a gear 24 is coaxially mounted on the bottom of the filter column 23. The gears 24 connecting adjacent filter columns 23 mesh with each other, and a drive component for driving one of the gears to rotate is also included. In the backwashing mode, the filter columns 23 can rotate relative to each other, thereby rubbing against each other and washing out the impurities absorbed inside.

[0018] The filter channel, with Figure 2 For example, the flow path can be from top to bottom or from bottom to top; the backwash flow path can be from left to right or from right to left. In the specific structural design, the filter flow path has a shut-off valve installed at the end face of the upper and lower flange platforms; the backwash flow path has valves and pipes opened around the circumference of the filter cylinder 2.

[0019] Additionally, a backwash pipe 25 is vertically installed in the middle of the filter cartridge 2, as shown in the reference. Figure 3 as well as Figure 4 As shown, when the filter column 23 twists to its limit, it surrounds the backwash pipe 25 circumferentially, and a valve 251 is provided on the backwash pipe 25 at the position where the filter column 23 twists. After a certain period of operation, the valve 251 can be opened, and the medium on the surface of the filter media can be discharged from the backwash pipe 25 without the need for additional high-pressure medium. In this case, it is not necessary to rotate the flange to maintain the twisted state of the filter media. Closing the filter channel valve on the lower flange 22 allows for initial backwash discharge. Example 2

[0020] The difference between this embodiment and Embodiment 1 lies in the different split-unit structure of the filter media module. (Refer to...) Figures 5 to 7 As shown, the filter media module's split unit is a fan-shaped filter column 23, referring to... Figure 6 As shown, the filter media body is installed at the end of the connecting block 232. A straight groove 211 is provided on the upper flange 21, which extends radially. A rotary cutting groove 221 is provided on the lower flange 22, which is rotatable. One end of the filter column 23 is housed in the straight groove 211 via the connecting shaft 231, and the other end is housed in the rotary cutting groove 221 via the connecting shaft 231. The rotary cutting groove 221 and the straight groove 211 form a kinematic pair, which causes the filter column 23 to move in a centered closing or outward diffusion motion when the lower flange 22 rotates.

[0021] The filter column 23 has a 12-petal structure, which forms a whole when closed and separates and intersects to form a certain gap when separated. This satisfies the needs of both filtration and backwashing modes in both operating states. The advantages of Embodiment Two are high operational stability, and the entire filter column 23 can be used for filtration, resulting in higher utilization of the filter media. The filter column 23 in this embodiment can be a flexible filter material with a certain degree of elasticity or a rigid filter material.

[0022] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency wastewater treatment device employing multi-stage filtration, characterized in that, It includes a multi-stage series filter cartridge (2), in which a filter media module and an extrusion module are installed; The filter media module consists of several cylindrical filter columns (23), which are arranged around the inner circumference of the filter cylinder (2). The middle part is a rubber column and the outer part is fixed with filter media. The extrusion module includes an upper flange (21) installed on the top of the filter column (23) and a lower flange (22) installed on the bottom of the filter column (23). One of them is a rotatable structure and the other is a fixed structure. By rotating the rotatable structure, one end of the filter column (23) is twisted, so that the middle part of the filter column (23) is squeezed together and close to each other for filtration; or it is restored to its original state and moved away from each other for deep backwashing. The bottom of the filter column (23) is coaxially mounted with a gear (24), the gears (24) connecting adjacent filter columns (23) mesh with each other, and also includes a drive component for driving one of the gears to rotate; It also includes a filter channel and a backwash channel, both of which are connected to a filter media module.

2. The high-efficiency wastewater treatment equipment employing multi-stage filtration according to claim 1, characterized in that, A backwash pipe (25) is installed in the middle of the filter cylinder (2). When the filter column (23) is twisted to its limit, it surrounds the backwash pipe (25) in the circumference. A valve (251) is opened in the backwash pipe (25) at the position where the filter column (23) is twisted and surrounded.

3. The high-efficiency wastewater treatment equipment employing multi-stage filtration according to claim 1, characterized in that, The filter media module has a fan-shaped filter column (23) in the split unit section. A straight groove (211) is provided on the upper flange (21), which extends radially. A rotary cutting groove (221) is provided on the lower flange (22), which is tangential in the axial direction. The lower flange (22) is rotatable. One end of the filter column (23) is housed in the straight groove (211) through the connecting shaft (231), and the other end is housed in the rotary cutting groove (221) through the connecting shaft (231). The rotary cutting groove (221) and the straight groove (211) form a kinematic pair, which makes it move to center and close or to spread outward when the lower flange (22) rotates.

4. A high-efficiency wastewater treatment device employing multi-stage filtration as described in claim 1 or 3, characterized in that, The filter channel passes through the middle of the upper flange (21) and the middle of the lower flange (22); the backwash channel is circumferential between the upper flange (21) and the lower flange (22), from one side of the circumferential direction to the other side of the circumferential direction.

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