A cone-disc assembly, a cone-disc type vortex grit chamber, and a modification method thereof.

Abstract

This invention discloses a conical disc assembly, a conical disc-type vortex grit chamber, and a modification method thereof. The conical disc assembly includes a frame and a disc body. The frame includes a bottom frame and a top frame. The bottom frame is connected to the top frame via multiple support columns. Multiple adjustable positioners are installed at intervals on the support columns. Each positioner has two spaced-apart positioning plates, and an adjusting block is positioned between the two positioning plates. The adjusting block has adjusting holes along its length. This invention uses a fixed conical disc assembly to replace the agitator in the vortex grit chamber, reducing operating energy consumption. Furthermore, the assembly method of the conical discs enables axial stratified water distribution in the grit chamber, increasing the effective settling space ratio, reducing the surface load of the chamber, and allowing independent operation of the grit settling process between each conical disc, effectively improving grit settling efficiency and enhancing the operational stability of the vortex grit chamber. The assembly method using positioners, positioning plates, and positioning blocks also effectively reduces the installation difficulty of the disc assembly.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, and more specifically, to a conical disc assembly, a conical disc vortex grit chamber, and a modification method thereof. Background Technology

[0002] High concentration of inorganic sand particles is one of the prominent characteristics of urban wastewater in my country. Sand particles with a diameter >75 micrometers usually settle at the bottom of the biological treatment tank, resulting in a reduction in effective tank volume, an increase in the frequency of sludge removal, and wear and tear on propellers and return pumps. Sand particles with a diameter <75 micrometers are easily suspended in the sludge mixture, resulting in a decrease in the proportion of organic components in the activated sludge and an increase in the difficulty of sludge disposal. This leads to an increase in the overall operation and maintenance costs of wastewater treatment plants.

[0003] The current sand settling facilities used in my country are mainly designed for sand particles with a diameter >200 micrometers and a relative gravity of 2.65, and there is a lack of attention to the removal effect on sand particles with a diameter <200 micrometers.

[0004] Mechanical cyclone grit chambers are widely used in my country due to their small footprint, relatively convenient operation and management, and low energy consumption. However, these chambers are less effective at removing sand particles smaller than 200 micrometers and have limited ability to cope with fluctuations in influent flow, failing to meet the industry's demands for refined operation, energy conservation, and carbon reduction in wastewater treatment plants. Therefore, improvements are urgently needed.

[0005] The wastewater treatment devices described in known patents US6645382 and US9770722 have multiple conical discs installed in their grit chambers to reduce the surface load of the grit chambers and improve solid-liquid separation efficiency. However, the conical discs and their mounting components are difficult to manufacture and have complex assembly methods, which can lead to deformation of the components during transportation or replacement, making assembly impossible or significantly increasing the assembly difficulty, thus hindering application.

[0006] Since the conical disc and its mounting components must be installed and connected in specific positions within the sedimentation tank to ensure optimal hydraulic performance of the entire sedimentation tank, the main objective of this invention is to reduce the assembly difficulty of the conical disc by improving its form and assembly method. Summary of the Invention

[0007] This invention provides a conical disc assembly, a conical disc vortex grit chamber, and a modification method, with the aim of installing a conical disc at a specific location within the vortex grit chamber and effectively connecting it to the inlet and outlet water channels, thereby improving grit settling efficiency without increasing the floor space or operating energy consumption of the vortex grit chamber.

[0008] According to one aspect of the present invention, a conical disc assembly is provided, comprising a frame and a disc body. The frame includes a bottom frame and a top frame. The bottom frame is connected to the top frame via a plurality of support columns. A plurality of adjustable positioners are spaced apart on each support column. Two spaced positioning plates are provided on each positioner. An adjusting block is provided between the two positioning plates. An adjusting hole along the length direction is provided on the adjusting block. An adjusting bolt is provided on each positioning plate, passing through the adjusting hole for locking. A positioning hole is provided on the side of the positioning plate opposite to the positioner. The disc body includes a plurality of conical discs, and positioning columns adapted to the positioning holes are provided on each conical disc.

[0009] Based on the above scheme, the preferred embodiment is that the positioner includes a front clamping plate and a rear clamping plate, the front clamping plate and the rear clamping plate are provided with arc-shaped grooves adapted to the support column, and the front clamping plate and the rear clamping plate are arranged opposite to each other and locked together by bolts.

[0010] Preferably, based on the above scheme, the width of the adjusting hole is greater than the diameter of the adjusting bolt.

[0011] Based on the above scheme, a preferred embodiment is that multiple supporting brackets are evenly distributed on the bottom frame and the top frame.

[0012] Based on the above scheme, the preferred embodiment further includes a water distributor and a water guide channel, wherein the water guide channel is connected to the water distributor and is arc-shaped and tangentially connected to the conical disc.

[0013] The present invention also provides a conical disc vortex grit chamber, comprising a grit chamber and the conical disc assembly described above. The grit chamber includes a chamber body and a grit collection hopper. The chamber body is connected to the grit collection hopper via a settling slope. The upper part of the chamber body is provided with a water inlet and a water outlet. The conical disc assembly is installed in the grit chamber. The water inlet is connected to the water guide channel via a water distributor.

[0014] Based on the above scheme, the preferred embodiment is that the water distributor divides the pool body into multiple water outlets at equal intervals along the axial direction, and each water outlet is connected to a water guide channel, which is a gradually narrowing arc shape.

[0015] This invention also provides a method for modifying a cone-shaped vortex grit chamber, characterized by comprising the following steps:

[0016] Step 1: Remove the existing mechanical vortex grit chamber top beam and mixing system;

[0017] Step 2: Install the frame into the sedimentation tank, and fix the top and bottom frames with the support brackets. Pre-fix the positioner according to the set position.

[0018] Step 3: All the positioning pins of the first cone disc are nested into the semi-circular slots of the positioning device of the installed support fixture. The radial, axial and circumferential positions of the cone disc inside the frame are adjusted by adjusting the relative positions of the positioning device, the front clamping plate and the rear clamping plate. After positioning, the locking is completed.

[0019] Step 4: Repeat step 3 to fix the remaining cone discs to the frame.

[0020] The present invention provides a conical disc assembly, a conical disc vortex grit chamber, and a modification method thereof. A fixed conical disc assembly can replace the agitator in a vortex grit chamber, reducing operating energy consumption. Furthermore, the assembly method of the conical discs enables axial stratified water distribution within the grit chamber, increasing the effective settling space ratio, reducing surface load, and allowing independent operation of the settling process between each conical disc. This effectively improves settling efficiency and enhances the operational stability of the vortex grit chamber. The assembly method using positioners, positioning plates, and positioning blocks also effectively reduces the installation difficulty of the disc assembly. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0022] Figure 1 A front view of an existing fluidized bed grit chamber;

[0023] Figure 2 This is a perspective view of the cone-shaped vortex grit chamber of the present invention;

[0024] Figure 3 This is a cross-sectional view of the center plane of the cone-shaped vortex grit chamber of the present invention;

[0025] Figure 4 Is along with Figure 3 A sectional view of a cone-shaped vortex grit chamber taken vertically;

[0026] Figure 5 This is a top view of the cone-shaped vortex grit chamber of the present invention;

[0027] Figure 6 This is a three-dimensional view of the cone disc connected to the frame via positioning blocks;

[0028] Figure 7 This is the invention Figure 6 Detailed diagram of I;

[0029] Figure 8 This is the invention Figure 6 Detailed diagram of Π;

[0030] Figure 9 This is a perspective view of the positioning block of the present invention;

[0031] Figure 10 This is a perspective view of the supporting bracket of the present invention;

[0032] Figure 11 This is a perspective view of the cone disk assembly of the present invention after installation;

[0033] Figure 12 This is a three-dimensional sectional view of the cone disk assembly of the present invention after installation.

[0034] Explanation of icon numbers:

[0035] Pool body 1, inlet channel 11, outlet channel 12, overflow weir 121, settlement slope 13, sand collection hopper 14, mixing system 15, top beam 16;

[0036] Disc body 2, cone disc 21, water guide channel 22, water outlet 23, water inlet 24;

[0037] Positioner 25, front clamping plate 251, rear clamping plate 252, positioner 253 and bolts 254 and 255; frame 26, top frame 261, bottom frame 262, support column 263;

[0038] Positioning post 212;

[0039] Positioning hole 2531, adjusting hole 2532;

[0040] Support bracket 27, top plate 271, bottom plate 272, support rib 273;

[0041] 3. Sand discharge pipe, 31. Sand suction port, 32. Sand discharge riser, 33. Sand discharge horizontal pipe. Detailed Implementation

[0042] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0043] It should be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of a descriptive feature, integral, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or sets.

[0044] To keep the drawings concise, only the parts relevant to the invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of components with the same structure or function is shown schematically, or only one is labeled. In this document, "one" can mean not only "only one" but also "more than one".

[0045] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0046] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various components of the invention are relative rather than absolute. These descriptions are appropriate when these components are in the positions shown in the drawings. If the descriptions of the positions of these components change, these directional indications also change accordingly.

[0047] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0049] Please see Figure 2 and combined Figure 3 , Figure 4 , Figure 5 , Figure 11 and Figure 12 As shown, a conical disc assembly of the present invention includes a frame 26 and a disc body 2. The frame 26 includes a bottom frame 262 and a top frame 261, as shown. Figure 2As shown, the bottom frame 262 of the present invention is circular, while the top frame 261 is polygonal. The bottom frame 262 and the top frame 261 are connected by multiple support columns 263. Multiple height-adjustable locators 25 are spaced apart on the support columns 263. Each locator 25 has two spaced positioning plates. Specifically, the locator 25 includes a front clamping plate 251 and a rear clamping plate 252. The front clamping plate 251 and the rear clamping plate 252 are provided with arc-shaped grooves adapted to the support columns 263. The positioning plates are placed on the front clamping plate 251, and the front clamping plate 251 and the rear clamping plate 252 are locked together by bolts 254. When adjustment is required, the bolts 254 between the front clamping plate 251 and the rear clamping plate 252 can be loosened to adjust the height of the locator 25 on the support column 263, thereby adjusting the relative position of the cone disc 21 and the frame 26 in the circumferential direction.

[0050] This invention includes an adjusting block 253 between two positioning plates. The adjusting block 253 has an adjusting hole 2532 along its length. An adjusting bolt 254 is provided on the positioning plate, passing through the adjusting hole 2532 for locking. In use, the adjusting bolt 254 can be adjusted to change the relative position between the adjusting block 253 and the positioning plate, thereby changing the radial position of the disc body 2. A positioning hole 2531 is provided on the side of the positioning plate away from the positioning device 25. The disc body 2 includes multiple conical discs 21, each with a positioning post 212 adapted to the positioning hole 2531. During installation of the conical discs 21, the positioning post 212 can be used to quickly fix and lock the position between the conical discs 21 and the adjusting block 253, reducing installation difficulty. Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown.

[0051] The width of the adjustment hole 2532 of the present invention is greater than the diameter of the adjustment bolt 254, so as to ensure that the relative position can be adjusted along the radial direction of the cone plate 21 before the positioner 25 and the front clamping plate 251 are fastened by the bolt 254. It is worth noting that the positioning hole 2531 of the present invention has a D-shaped cross section, and the top and bottom of the cone plate 21 of the present invention are both open circular cross sections; the small circular surface is at the bottom and the large circular surface is at the top along the axial direction of the pool body 1, and they are arranged in an equally spaced, nested manner.

[0052] In order to ensure the connection strength between the frame 26 and the disc body 2, the positioning hole 2531 of the present invention is a through hole, and positioning posts 212 are provided at the top and bottom of the cone disc 21, thereby realizing the double positioning and locking of the cone disc 21 from top to bottom, and realizing the relative fixation between the cone disc 21 and the frame 26.

[0053] The present invention also provides a cone-disc 21 type vortex grit chamber, including a grit chamber and a cone-disc assembly. The grit chamber includes a tank body 1 and a sand collection hopper 14. The tank body 1 is connected to the sand collection hopper 14 through a settling slope 13. A water inlet 24 and a water outlet are provided at the upper part of the tank body 1. The cone-disc assembly is installed in the grit chamber. The water inlet 24 is connected to the water guide channel 22 through a water distributor.

[0054] Specifically, the conical disk assembly of the present invention also includes a water distributor and a water guide trough 22. The water guide trough 22 is connected to the water distributor and is arc-shaped and tangentially connected to the conical disk 21. The water distributor divides into multiple water outlets 23 at equal intervals along the axial direction of the pool body 1. Each water outlet 23 is connected to a water guide trough 22. The water guide trough 22 is a gradually narrowing arc shape.

[0055] The number and diameter of the cone discs 21 of the present invention can be adjusted according to the diameter and depth of the mechanical vortex sedimentation tank body 1.

[0056] It is worth noting that a plurality of supporting brackets 27 are evenly distributed on the bottom frame 262 and the top frame 261 of the present invention. Each supporting bracket 27 includes a top plate 271, a bottom plate 272, and supporting ribs 273. The top plate 271 is welded to the bottom plate 272 and connected through the supporting ribs 273. The supporting brackets 27 are used to achieve positioning and locking between the frame 26 and the sedimentation tank. For details of the structure, please refer to [link / reference]. Figure 10 .

[0057] At least three supporting brackets 27 are installed on the surface of the settling slope 13 of the sedimentation tank, so that the top plates 271 of each bracket are on the same plane; conical discs 21 are stacked and fixed on this plane, so that each conical disc 21 is placed coaxially; by adjusting the shape of the supporting ribs 273, the bottom plate 272 of the supporting bracket 27 can be fitted to the inner wall of the circular tank body 1 or the inner wall of the settling slope 13; the supporting brackets 27 are fixed to the tank body 1 or the slope using bolts 254 through the bolt holes 254 on the bottom surface.

[0058] This invention also provides a method for modifying a sedimentation tank, comprising the following steps:

[0059] Step 1: Remove the existing mechanical cyclone sedimentation tank top beam 16 and mixing system 15, as follows: Figure 1 The structure is shown below;

[0060] Step 2: Install the frame 26 into the sedimentation tank, and fix and lock the top frame 261 and the bottom frame 262 by the support bracket 27, and fix the positioner 25 according to the set position.

[0061] Step 3: All the positioning pins 212 of the first cone disc 21 are nested into the semi-circular slots of the positioning device 25 of the installed support fixture. The radial, axial and circumferential positions of the cone disc 21 inside the frame 26 are adjusted by adjusting the relative positions of the positioning device 25, the front clamping plate 251 and the rear clamping plate 252. After positioning, the locking is completed.

[0062] Step 4: Repeat step 3 to fix the remaining cone disc 21 to the frame 26.

[0063] The installation method of the conical disc 21, supporting clamp, and frame 26 of the present invention involves connecting the positioning cylinders on the top and bottom surfaces of the rectifying support groove of each conical disc 21 to the frame 26 via the supporting clamp. Therefore, by using the top and bottom surfaces of the supporting clamp to contact the frame edge of the frame 26, a single conical disc 21 and its connected positioner 25 and frame 26 can be made into a single conical disc 21 unit. Alternatively, the top and bottom surfaces of the positioner 25 can be used to contact the bottom and top surfaces of the rectifying support grooves of two different conical discs 21, allowing multiple conical discs 21 and their connected positioners 25 and frame 26 to be grouped into a single conical disc 21 unit.

[0064] The modification method of the sedimentation tank of the present invention includes the following steps: a tapered water inlet 24 is installed inside the water inlet channel 11; the end of the water inlet 24 is connected to a water distribution outlet 23, and the water distribution outlet 23 is divided into multiple outlets at equal intervals along the axial direction of the tank body 1; each outlet of the water distribution outlet 23 is connected to a water guide channel 22; the water guide channel 22 is a tapered arc shape, and is respectively connected to the water distribution outlet 23 and the top straightening support channel of the cone plate 21; the upper and lower inner surfaces of the water guide channel 22 coincide with the upper and lower outer surfaces of the straightening support channel, and the end of the water guide channel 22 coincides with the side wall of the straightening support channel, thereby realizing the covering installation of the water guide channel 22 over the straightening support channel.

[0065] The method for modifying the sedimentation tank of the present invention includes the following steps: an overflow weir 121 is set in the effluent channel 12, the top height of the overflow weir 121 is adjustable, and the height range after adjustment is from the top plane of the top cone plate 21 guide support groove to the top plane of the second top cone plate 21 guide support groove.

[0066] The method for connecting the conical disc assembly to the inlet and outlet channels 12 of the mechanical vortex grit chamber according to the present invention includes the following steps: installing a coaxial sand discharge pipe 3 along the central axis of the circular pool body 1. The sand discharge pipe consists of a sand suction port 31, a sand discharge riser 32, and a sand discharge horizontal pipe 33. The diameters of the sand discharge riser 32 and the horizontal pipe are equal but smaller than the diameter of the sand suction port 31. The sand discharge horizontal pipe 33 can be set above the top plane of the circular pool body 1 or below the bottom plane of the settlement slope 13. The position of the sand suction port 31 is no more than 50 cm away from the ground plane of the sand collection hopper 14. The length of the sand discharge riser 32 can be adjusted according to the height of the sand discharge horizontal pipe 33.

[0067] The present invention provides a cone-disc assembly, a cone-disc 21 type vortex grit chamber, and a modification method. The fixed cone-disc assembly can replace the agitator of the vortex grit chamber, reducing operating energy consumption. Furthermore, the assembly form of the cone-disc 21 can achieve axial stratified water distribution in the grit chamber, increase the effective settling space ratio of the chamber 1, reduce the surface load of the chamber 1, and enable independent operation of the settling process between each cone-disc 21, effectively improving settling efficiency and enhancing the operational stability of the vortex grit chamber. The assembly method of the positioner 25, positioning plate, and positioning block can also effectively reduce the installation difficulty of the disc assembly.

[0068] Finally, the method described in this application is merely a preferred embodiment and is not intended to limit the scope of protection of this invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A conical disk assembly, characterized in that, The device includes a frame and a disc body. The frame includes a bottom frame and a top frame. The bottom frame is connected to the top frame by multiple support columns. Multiple adjustable positioners are installed at intervals on the support columns. Each positioner has two positioning plates installed at intervals. An adjustment block is provided between the two positioning plates. The adjustment block has an adjustment hole along the length direction. Adjustment bolts are provided on the positioning plates. The adjustment bolts pass through the adjustment holes to lock the device. Positioning holes are provided on the side of the positioning plates opposite to the positioners. The disc body includes multiple conical discs. Positioning posts that are adapted to the positioning holes are provided on the conical discs.

2. The conical disk assembly as described in claim 1, characterized in that, The positioner includes a front clamping plate and a rear clamping plate. The front clamping plate and the rear clamping plate are provided with arc-shaped grooves that are adapted to the support column. The front clamping plate and the rear clamping plate are arranged opposite to each other and locked together by bolts.

3. The conical disk assembly as described in claim 1, characterized in that, The width of the adjusting hole is greater than the diameter of the adjusting bolt.

4. The conical disk assembly as described in claim 1, characterized in that, Multiple supporting brackets are evenly distributed on the bottom frame and the top frame.

5. A conical disk assembly as described in claim 1, characterized in that, It also includes a water distributor and a water guide channel, the water guide channel being connected to the water distributor, the water guide channel being arc-shaped and tangentially connected to the conical disc.

6. A cone-shaped vortex grit chamber, characterized in that, The system includes a sedimentation tank and a cone-shaped assembly as described in claim 5. The sedimentation tank includes a tank body and a sand collection hopper. The tank body is connected to the sand collection hopper via a settling slope. The upper part of the tank body is provided with a water inlet and a water outlet. The cone-shaped assembly is installed inside the sedimentation tank. The water inlet is connected to the water guide channel via a water distributor.

7. A cone-shaped vortex grit chamber as described in claim 6, characterized in that, The water distributor divides the pool into multiple outlets at equal intervals along the axial direction of the pool body. Each water outlet is connected to a water guide channel, which is a gradually narrowing arc shape.

8. A method for modifying the cone-shaped vortex grit chamber as described in claim 6, characterized in that, Includes the following steps: Step 1: Remove the existing mechanical vortex grit chamber top beam and mixing system; Step 2: Install the frame into the sedimentation tank, and fix the top and bottom frames with the support brackets. Pre-fix the positioner according to the set position. Step 3: Insert all the positioning pins of the first cone disc into the positioning holes of the positioning device of the installed support fixture, and adjust the radial, axial and circumferential positions of the cone disc inside the frame by adjusting the relative positions of the positioning device, the front clamping plate and the rear clamping plate. After positioning, lock it. Step 4: Repeat step 3 to fix the remaining cone discs to the frame.

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