CN216092453U

CN216092453U - Filter basket and impurity separation system suitable for impurity separation in sewage sludge

Info

Publication number: CN216092453U
Application number: CN202122714978.2U
Authority: CN
Inventors: 李鑫; 张婷; 王婧睿; 曹效鑫; 庞洪涛; 侯锋
Original assignee: Guizhou Zhuxin Water Affairs Environment Industry Co ltd; SDIC Xinkai Water Environment Investment Co Ltd
Current assignee: Guizhou Zhuxin Water Affairs Environment Industry Co ltd; SDIC Xinkai Water Environment Investment Co Ltd
Priority date: 2021-11-08
Filing date: 2021-11-08
Publication date: 2022-03-22
Anticipated expiration: 2031-11-08

Abstract

The utility model provides a filter basket suitable for separating impurities from sewage and sludge and an impurity separation system, wherein the filter basket suitable for separating impurities from sewage and sludge comprises a filter basket framework, a bottom filter structure and a side filter structure; the side filtering structure comprises a first mounting bracket and a side filtering net; the side filter screens are detachably mounted on the first mounting bracket, the side filter screens are sequentially provided with multi-stage meshes from top to bottom along the height direction, and the pore diameters and/or pore spaces among the multi-stage meshes are sequentially reduced from top to bottom; bottom filtration includes second installing support and bottom filter screen, bottom filter screen detachable installs on the second installing support. The utility model carries out secondary treatment on the sewage in the rear-end water treatment structure, can flexibly adjust the aspects of the filter screen forms, the aperture sizes, the porosity and the like of the side filter screen and the bottom filter screen according to the actual conditions, and can accurately separate fibrous, flaky and granular impurities.

Description

Filter basket and impurity separation system suitable for impurity separation in sewage sludge

Technical Field

The utility model relates to the field of sewage treatment, in particular to a device for separating impurities from sewage sludge and an impurity separation system.

Background

The urban development is followed, the sewage discharge amount is increasing day by day, and the number of sewage treatment plants and the total treatment capacity are also increasing. The effluent indexes are becoming stricter, so that the application of membrane treatment systems, filter systems and the like is more common. With the continuous improvement of treatment standards, the biochemical process adopts a filler-dependent biological membrane process, a membrane bioreactor process and the like, and has higher requirements on the content of impurities in the mixed liquid. And further has higher requirements on the content of impurities in water.

Aiming at the separation of impurities in sewage and sludge, the conventional sewage treatment plant mainly focuses on treatment units such as a coarse grid, a fine grid, an aeration grit chamber, a primary settling tank and the like at the front end of the treatment process, the minimum filtration precision is generally between 1mm and 20mm, and the expected effect can be usually achieved. However, due to installation accuracy and the like, for example, fibrous impurities and sheet-like impurities can still pass through the pretreatment system and enter the rear-end water treatment structure, and because sewage in the water treatment structure is stored in the water treatment structure for a long time, the impurities can enter the sewage in the water treatment structure again due to factors such as construction environment and the like. Impurity solids are continuously accumulated in the structure, and along with the increase of the operation life, impurities in the structure occupy effective volume and even cause phenomena of local dead zones, sludge accumulation and the like.

The impurities such as fiber and the like exist in the water treatment structure for a long time, which will lead to the reduction of the effective tank volume of the structure and cause damage to the stable operation of a rear-end membrane system and a filter tank system. In the prior art, the problem is not paid enough attention in daily operation, and an effective, simple and convenient to operate and low-cost solution is not available.

Patent document CN 208869334U discloses a novel grid machine for sewage treatment, which comprises a sewage treatment tank, the upper surface of the sewage treatment tank is provided with four electric telescopic rods I, the top ends of the electric telescopic rods I are provided with connecting frames, the lower surface of the connecting frame on the right side is connected with a filtering grid II, the lower surface of the connecting frame on the left side is connected with a filtering grid I, the novel grid machine for sewage treatment is convenient for filtering fixed substances in sewage by arranging the first filtering grid and the second filtering grid, the electric telescopic rod II, the push plate and the cleaning brush are arranged to facilitate the cleaning of the fixed substances on the first filter grid and the second filter grid, collect the box through setting up and be convenient for collect the processing to the solid matter, can avoid electric telescopic handle two and electric telescopic handle one and sewage contact through the sewage treatment pond to receive the erosion to electrical equipment. However, this solution still has the problem that some impurities are not filtered due to reasons such as installation accuracy, and the problem that the sewage entering the rear water treatment structure is polluted again after being treated by the grating machine cannot be solved.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a filter basket and an impurity separation system which are suitable for separating impurities in sewage and sludge.

The filter basket suitable for separating impurities from sewage and sludge provided by the utility model comprises a filter basket framework, a bottom filter structure and a side filter structure;

the four side surfaces of the filter basket framework are respectively provided with a side surface filter structure, and the side surface filter structure comprises a first mounting bracket and a side surface filter screen; the side filter screen is detachably mounted on the first mounting bracket, and the first mounting bracket is fixedly connected with the filter basket framework;

the side filter screen is sequentially provided with multi-stage meshes from top to bottom along the height direction, the apertures and/or the hole intervals among the multi-stage meshes are different, and the apertures and/or the hole intervals among the multi-stage meshes are sequentially reduced from top to bottom;

the bottom filtering structure is arranged at the bottom of the filtering basket framework; the bottom filtering structure comprises a second mounting bracket and a bottom filtering net, and the bottom filtering net is detachably mounted on the second mounting bracket; the second mounting bracket is fixedly connected with the filtering basket framework.

Preferably, the quantity of bottom filter screen is a plurality of, a plurality of bottom filter screens are arranged along vertical direction in proper order, form lamellar structure, just aperture and/or hole interval between the bottom filter screen are inequality, aperture and/or hole interval between the bottom filter screen decrease progressively from top to bottom in proper order.

Preferably, the number of the side filter screens is multiple, and the multiple side filter screens are arranged in parallel to form a laminated structure.

Preferably, still include a plurality of collars, all be provided with the collar on the four corners on the top of straining the basket skeleton.

Preferably, the meshes of the side filter screen are round holes or wedge-shaped meshes.

Preferably, the meshes of the bottom filter screen are round holes or wedge-shaped meshes.

Preferably, be provided with first spout on the first installing support, first spout is followed the filter basket direction of height who is applicable to impurity separation in the sewage mud arranges, the both ends of side filter screen are provided with first bellying, first spout with first bellying matches mutually, the side filter screen can pass through first bellying is followed with first spout the filter basket direction of height who is applicable to impurity separation in the sewage mud slides.

Preferably, be provided with the second spout on the second installing support, the second spout is arranged along the width direction who is applicable to impurity separation's filter basket in sewage mud, the both ends of bottom filter screen are provided with the second bellying, the second spout with the second bellying matches mutually, the bottom filter screen can pass through second bellying and second spout are followed the width direction who is applicable to impurity separation's filter basket in sewage mud slides.

Preferably, the mesh aperture of the side screen and the mesh aperture of the bottom screen are both between 1mm and 20 mm.

According to the impurity separation system provided by the utility model, the filter basket suitable for separating impurities from sewage and sludge is adopted, and the impurity separation system further comprises a circulating pump and a pipeline;

the circulating pump is installed below the sewage liquid level, the output end of the circulating pump is connected with one end of the pipeline, the other end of the pipeline extends out of the water surface and is arranged above the filtering basket suitable for separating impurities from sewage and sludge.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model carries out secondary treatment on the sewage in the rear-end water treatment structure through the bottom filtering structure and the side filtering structure, can flexibly adjust the aspects of the filter screen forms, the pore sizes, the porosity and the like of the side filter screen and the bottom filter screen according to the actual situation, and can accurately separate fibrous, flaky and particle impurities.

2. The utility model has low operation cost, can be separated by gravity, can be combined with the prior pipeline system for use or is provided with a water pump independently for lifting sewage, and is convenient for separating impurities.

3. The utility model can erect the separation device without stopping production and does not influence the normal operation of the sewage treatment system.

Drawings

Other features, objects and advantages of the utility model will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic view of a side screen according to the present invention;

FIG. 2 is a schematic view of a bottom screen according to the present invention;

FIG. 3 is a schematic diagram of the impurity separation system of the present invention;

fig. 4 is a schematic structural view of the first protrusion and the first sliding groove according to the key point of the present invention.

The figures show that:

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the utility model, but are not intended to limit the utility model in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the utility model. All falling within the scope of the present invention.

The utility model provides a filter basket suitable for separating impurities from sewage and sludge, which comprises a filter basket framework, a bottom filter structure and a side filter structure; in a preferable example, an internal screen can be additionally arranged in the filter basket suitable for separating impurities in sewage sludge according to requirements.

The four side surfaces of the filter basket framework are respectively provided with a side surface filter structure, and the side surface filter structure comprises a first mounting bracket 1 and a side surface filter screen 2; side filter screen 2 detachable install on first installing support 1, first installing support 1 with straining basket skeleton fastening connection, in a preferred embodiment, first installing support 1 with strain basket skeleton body coupling. The screen form, the opening rate and the aperture of the side filter screen 2 can be arranged according to the impurity content and the physical property of impurities in the sewage sludge to be separated and the spatial position.

To the gravity separation characteristics, side filter screen 2 all is provided with multistage mesh from top to bottom in proper order along the direction of height, aperture and/or hole interval between the multistage mesh are inequality, aperture and/or hole interval between the multistage mesh decrease progressively from top to bottom in proper order. That is, along the vertical direction of the filter basket suitable for separating impurities in sewage sludge, the side filter screen 2 is provided with a plurality of stages of meshes with different apertures and porosities, a plurality of stages can be arranged downwards along the height direction, the height is the same in the same interval, the aperture size and porosity of each stage is reduced by 1-3mm from top to bottom, and the actual requirement is determined; the side filter screen 2 reduces the aperture and the porosity sequentially from top to bottom along the height direction; the lower part of the side filter screen 2 is arranged with small aperture and low porosity.

The arrangement form can ensure that the liquid level pressure and the sieving resistance of gravity separation are matched, the deeper the liquid level is, the larger the sieving pressure is, the smaller the configured hole is, the larger the sieving resistance is, and the higher the filtering efficiency is due to the large sieving resistance matched by the large sieving pressure. By adopting the mode, the condition that impurities permeate due to the fact that the flow velocity block of the through hole and the pressure are large can be prevented, and the synchronous separation of the impurities with different densities is facilitated. Preferably, the side screen 2 has a mesh aperture or a grating gap of 1mm to 20 mm.

As shown in FIG. 1, in a preferred embodiment, the number of the multi-stage meshes is three, namely, a first-stage mesh 3, a second-stage mesh 4 and a third-stage mesh 5; the aperture sizes of the first-stage meshes 3, the second-stage meshes 4 and the third-stage meshes 5 are 8mm, 5mm and 3mm respectively. The porosity of the primary meshes 3, the secondary meshes 4 and the tertiary meshes 5 is 35%, 38% and 40% respectively. In a preferred embodiment, the number of the side screen 2 may be multiple, and the multiple side screens 2 are arranged in parallel to form a laminated structure. The distance between the side filter screens 2 is preferably controlled to be 50-200 mm.

The bottom filtering structure is arranged at the bottom of the filtering basket framework; the bottom filtering structure comprises a second mounting bracket and a bottom filtering net, and the bottom filtering net is detachably mounted on the second mounting bracket; the second mounting bracket is fixedly connected with the filter basket framework; in a preferred embodiment, the second mounting bracket is integrally connected with the filter basket framework. The form, the aperture ratio and the aperture of the bottom filter screen can be designed according to the impurity content and the physical property of impurities in the sewage sludge to be separated. The aperture of the mesh or the gap of the bars of the bottom filter screen is between 1mm and 20 mm.

In a preferred embodiment, the quantity of bottom filter screen is a plurality of, a plurality of bottom filter screens are arranged along vertical direction in proper order, form lamellar structure, just aperture and/or hole interval between the bottom filter screen are inequality, aperture and/or hole interval between the bottom filter screen decrease progressively from top to bottom in proper order. The distance between the bottom filter screens is preferably controlled to be 50-200 mm. Preferably, as shown in fig. 2, the number of the bottom screens is 3, which are respectively a first bottom screen 6, a second bottom screen 7 and a third bottom screen 8. The aperture sizes of the first bottom filter screen 6, the second bottom filter screen 7 and the third bottom filter screen 8 are respectively 10mm, 8mm and 5 mm. The hole spacing of the first bottom filter screen 6, the second bottom filter screen 7 and the third bottom filter screen 8 is 42%, 40% and 38% respectively.

In the filter basket suitable for impurity separation in sewage sludge, the number of piles of side filter screen 2 is the same with the number of piles of bottom filter screen, works as the number of piles of side filter screen 2 with the number of piles of bottom filter screen is when 1 layer, 2 bottom trompils of side filter screen and bottom filter screen trompil are minimum and equal.

The filter basket suitable for impurity separation in sewage sludge further comprises a plurality of mounting rings 9, and the mounting rings 9 are arranged on four corners of the top end of the filter basket framework. The mounting ring 9 is used for mounting a filter basket suitable for separating impurities in sewage sludge at a specific position.

The meshes of the side filter screen 2 are round hole meshes or wedge-shaped meshes, and the meshes of the bottom filter screen are round hole meshes or wedge-shaped meshes.

In a preferred embodiment, as shown in fig. 4, a first sliding groove 12 is provided on the first mounting bracket 1, the first sliding groove 12 is arranged along the height direction of the filter basket suitable for separating impurities from sewage and sludge, first protrusions 11 are provided at two ends of the side filter screen 2, the first sliding groove 12 is matched with the first protrusions 11, and the bottom filter screen can slide along the height direction of the filter basket suitable for separating impurities from sewage and sludge through the first protrusions 11 and the first sliding groove 12.

In a preferred embodiment, the second mounting bracket is provided with a second chute, the second chute is arranged along the width direction of the filtering basket suitable for separating impurities from sewage and sludge, the two ends of the bottom filtering net are provided with second protrusions, the second chute is matched with the second protrusions, and the bottom filtering net can slide along the width direction of the filtering basket suitable for separating impurities from sewage and sludge through the second protrusions and the second chute.

According to parameters such as scale, process and structure of a water treatment system, a proper filter basket suitable for separating impurities in sewage sludge is selected, namely, according to conditions such as types and sizes of the impurities to be separated, a proper screen type, spatial arrangement, porosity and pore diameter are selected, so that the design work of the impurity separating device is completed. The proper position is selected to complete the erection of the filter basket suitable for impurity separation in sewage sludge, the filter basket suitable for impurity separation in sewage sludge is preferentially installed in a hydraulic pipeline, a channel and the like in a water treatment system, if the filter basket is arranged below outlets such as a pretreated water inlet pipe channel, a digestive juice return pipe channel and a sludge return pipe channel, water flow enters from the upper part of the filter basket suitable for impurity separation in sewage sludge, and under the action of gravity, the bottom filter screen and the side wall screen mesh are used for separating impurities. Through continuous operation, the liquid level in the filter basket suitable for separating impurities in sewage and sludge can be observed, the sieving resistance is continuously increased along with the accumulation of separated impurities, and the liquid level in the filter basket suitable for separating impurities in sewage and sludge can continuously rise, so that the cleaning time of the device is judged; the filter screen of the filter basket suitable for impurity separation in sewage sludge is in a detachable form, and can be directly replaced into subsequent separation operation after the filter screen is completely replaced, so that the separation efficiency is improved.

The filtering basket suitable for separating impurities from sewage and sludge is simple in structure, convenient to operate and maintain, and capable of being coupled with hydraulic pipelines, channels and the like in a water treatment system to complete the separation of the impurities under the action of gravity. When sewage containing impurities passes through, water can flow through the filtering basket suitable for separating impurities from sewage sludge under the action of gravity, so that the impurities are separated from the sewage, and the aim of removing the impurities is fulfilled.

The filter basket suitable for impurity separation in sewage sludge can set up single-layer or multilayer filter screen structure at lateral wall, bottom as required to accomplish the separation treatment to specific impurity. The filter basket suitable for separating impurities in sewage and sludge is provided with a replaceable side filter screen 2 and a replaceable bottom filter screen; the form, the arrangement of the holes, the aperture and the spacing of the filter screens can be freely switched according to the material quality to be separated, and the number of impurity separation can be greatly increased and the cleaning period can be prolonged by arranging the filter screens along the height direction in a differentiated manner;

the filter basket suitable for separating impurities in sewage and sludge can be arranged at the outlet of a water inlet pipe, a digestive juice backflow pipe and a sludge backflow pipe, and if the existing pipe and canal are utilized, external power is not needed, and gravity is directly utilized for separation.

The utility model also provides an impurity separation system, which adopts the filter basket suitable for separating impurities in sewage and sludge, and also comprises a circulating pump 10 and a pipeline;

when the filtering basket suitable for separating the impurities in the sewage and the sludge is not suitable for a sewage pipeline to be used, a circulating pump 10 is additionally arranged in a reactor such as a biochemical tank and the like to lift the sewage into the filtering basket suitable for separating the impurities in the sewage and the sludge, and the separation of the impurities from the sewage is completed by gravity separation.

That is, as shown in fig. 3, the circulation pump 10 is installed below the sewage level, the output end of the circulation pump 10 is connected with one end of the pipeline, and the other end of the pipeline extends out of the water surface and is arranged above the filter basket suitable for separating impurities in sewage sludge.

The utility model is erected above the water treatment structure, can finish arrangement work in the continuous operation process of the water treatment structure, and provides a non-stop separation scheme for impurity separation in a water treatment facility running at full water volume.

The utility model aims to control the quantity of impurities such as fiber, flake and particle in mixed liquor in a water treatment structure to be in a certain range through long-term and continuous impurity separation, thereby ensuring the stability of facilities and process units in a system.

The utility model mainly solves the following problems:

(1) due to the reasons of insufficient installation precision of all levels of gratings, equipment aging and the like in the pretreatment area of the water treatment facility, impurities are trapped and enter a rear-end water treatment structure through the pretreatment facility. And because the sewage in the water treatment structure is stored in the water treatment structure for a long time, impurities can enter the sewage in the water treatment structure again due to factors such as construction environment. Thereby influencing the normal operation of subsequent processes, devices, equipment and the like and bringing about the problems of increased faults, shortened service life and the like; the utility model is adopted to carry out retreatment on the sewage in the rear-end water treatment structure, and the quantity of impurities such as fibers, sheets, particles and the like in the mixed liquid in the water treatment structure is controlled within a certain range, thereby ensuring the stability of facilities and process units in the system.

(2) The utility model solves the problem that sundries are difficult to separate without stopping production when continuously operating water treatment facilities, and the utility model has flexible erection and can select points to erect according to actual conditions;

(3) the sewage in the rear-end water treatment structure is treated again by adopting the utility model, and the quantity of impurities such as fibers, sheets, particles and the like in the mixed liquid in the water treatment structure is controlled within a certain range, so that the problems of system blockage, filler winding and the like caused by excessive impurities in water treatment facilities such as a subsequent biological film or sludge film symbiotic system, a membrane bioreactor system and the like are reduced;

(4) excessive impurities exist in the water treatment facility, and can be removed only in a residual sludge discharge mode under the condition of no intervention, the way is passive, the separation amount is limited, and the treatment effect of a subsequent system is influenced. After the utility model is adopted, the impurities in the water treatment facility are reduced, and the treatment effect of a subsequent system is improved.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the utility model. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. A filter basket suitable for separating impurities in sewage and sludge is characterized by comprising a filter basket framework, a bottom filter structure and a side filter structure;

the four side surfaces of the filter basket framework are respectively provided with a side surface filter structure, and the side surface filter structure comprises a first mounting bracket (1) and a side surface filter screen (2); the side filter screen (2) is detachably mounted on the first mounting bracket (1), and the first mounting bracket (1) is fixedly connected with the filter basket framework;

the side filter screen (2) is sequentially provided with multi-stage meshes from top to bottom along the height direction, the apertures and/or the hole intervals among the multi-stage meshes are different, and the apertures and/or the hole intervals among the multi-stage meshes are sequentially reduced from top to bottom;

2. The filter basket suitable for impurity separation in sewage sludge according to claim 1, wherein the number of the bottom filter screens is plural, the plural bottom filter screens are sequentially arranged along a vertical direction to form a layered structure, the pore diameters and/or the pore distances between the bottom filter screens are different, and the pore diameters and/or the pore distances between the bottom filter screens are sequentially decreased from top to bottom.

3. Filter basket suitable for the separation of impurities in sewage sludge according to claim 1, characterized in that said side screen (2) is in number of several, said several side screens (2) being arranged in parallel forming a layered structure.

4. The filter basket suitable for separating impurities from sewage sludge according to claim 1, further comprising a plurality of mounting rings (9), wherein the mounting rings (9) are arranged on four corners of the top end of the filter basket framework.

5. Filter basket suitable for the separation of impurities in sewage sludge according to claim 1, characterized in that the meshes of the side screen (2) are round or wedge meshes.

6. The filter basket suitable for the separation of impurities from sewage sludge according to claim 1, wherein the mesh of the bottom screen is a round hole mesh or a wedge-shaped mesh.

7. The filter basket suitable for separating impurities from sewage and sludge according to claim 1, wherein a first sliding groove (12) is formed in the first mounting bracket (1), the first sliding groove (12) is arranged along the height direction of the filter basket suitable for separating impurities from sewage and sludge, first protrusions (11) are arranged at two ends of the side filter screen (2), the first sliding groove (12) is matched with the first protrusions (11), and the side filter screen (2) can slide along the height direction of the filter basket suitable for separating impurities from sewage and sludge through the first protrusions (11) and the first sliding groove (12).

8. The filter basket suitable for separating impurities from sewage and sludge according to claim 1, wherein a second sliding groove is formed in the second mounting bracket, the second sliding groove is arranged along the width direction of the filter basket suitable for separating impurities from sewage and sludge, second protrusions are arranged at two ends of the bottom filter screen, the second sliding groove is matched with the second protrusions, and the bottom filter screen can slide along the width direction of the filter basket suitable for separating impurities from sewage and sludge through the second protrusions and the second sliding groove.

9. Filter basket suitable for the separation of impurities in sewage sludge according to claim 1, wherein the side screen (2) has a mesh aperture between 1mm and 20mm from the bottom screen.

10. An impurity separation system, characterized in that, a filter basket suitable for impurity separation in sewage sludge is adopted according to any one of claims 1 to 9, and further comprises a circulating pump (10) and a pipeline;

the circulating pump (10) is installed below the sewage liquid level, the output end of the circulating pump (10) is connected with one end of the pipeline, and the other end of the pipeline extends out of the water surface and is arranged above the filtering basket suitable for separating impurities from sewage and sludge.