A filter tank facility for upgrading and transforming a sewage treatment plant

Abstract

The present invention belongs to the technical field of sewage treatment, and in particular relates to a filter tank facility for upgrading and renovating sewage treatment plants. The present invention provides a filter tank facility for upgrading and renovating sewage treatment plants. By arranging an upper water pipe, a lower water pipe, an aeration pipe, a backwash air pipe, filter material, a support frame unit, a perforated lower filter unit, a rotating ring unit, and an upper filter unit on the tank body, the following can be achieved: 1. The filter material can be stably installed between the perforated lower filter unit and the upper filter unit; 2. After the rotating ring unit is lowered, the used filter material can fall and eventually be discharged at the thicker and perforated lower water pipe, ensuring that the filter material replacement operation is relatively convenient and quick.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage treatment, and in particular relates to a filter tank facility used for upgrading and transforming a sewage treatment plant. Background Art

[0002] Sewage treatment plant upgrading refers to raising existing discharge standards. For example, emissions of COD, ammonia nitrogen, total nitrogen, and total phosphorus in wastewater must be further optimized. Consequently, sewage treatment plants must improve and update treatment processes, sewage treatment equipment, and sewage treatment chemicals. This includes structural improvements to the filter tanks themselves.

[0003] The structure of existing filter tanks primarily consists of a filter body, filter media, an inlet pipe, a outlet pipe, and a downpipe. The filter body is typically rectangular, with fixed orifice plates on both the top and bottom sides of the filter media. The inlet pipe is used to add sewage and discharge backwash water, while the downpipe is used to discharge treated water and add backwash water. Furthermore, there are typically two downpipes, one for aeration and one for backwash.

[0004] Among them, the sewer pipe generally has larger openings for quickly discharging treated water, and the backwash air pipe is thicker than the aeration pipe to provide a sufficiently large backwash air volume. The aeration pipe is longer and more tortuous than the backwash air pipe to ensure that all microorganisms on the filter material can get enough air.

[0005] The Chinese utility model patent with patent publication number CN214880500U and publication date of November 26, 2021, discloses an aerated biological filter device for improving the quality of municipal sewage. Its structure includes a drainage device, a water storage tank, an outlet pipe, a leakage pipe, a right fixed frame, a reinforcement rod, an aerated biological filter, a controller, and a filter screen.

[0006] The filter device in this utility model patent has structures related to the filter material, namely, the reinforcement rod and the filter screen. From top to bottom, the structures are the reinforcement rod, the upper filter screen, and the lower filter screen. The filter material is located between the upper and lower filter screens to ensure the stability of the installation position of the filter material in the filter tank.

[0007] However, a major drawback of this filter device in actual use is that the filter material is inconvenient to replace. After the use period, the reinforcement rods need to be removed first and the filter material needs to be dug up, which is very inefficient and troublesome. This is also the technical problem to be solved by the present invention.

[0008] Therefore, in summary, there is an urgent need for a new type of filter tank facility with stable filter media installation and convenient replacement, so as to be used in the upgrading and transformation operations of sewage treatment plants. Summary of the Invention

[0009] The present invention provides a filter tank facility for upgrading and transforming a sewage treatment plant. By arranging an upper water pipe, a lower water pipe, an aeration pipe, a backwash air pipe, filter material, a support frame unit, a perforated lower filter unit, a rotating ring unit, and an upper filter unit on the tank body, the following can be achieved: 1. The filter material can be stably installed between the perforated lower filter unit and the upper filter unit; 2. After the rotating ring unit descends, the used filter material can fall and finally be discharged at a thicker and perforated lower water pipe, thereby ensuring that the filter material replacement operation is relatively convenient and quick.

[0010] The technical solution adopted by the present invention to solve the above-mentioned problems is: a filter tank facility for upgrading and transforming a sewage treatment plant, the structure of which includes a tank body, an inlet pipe, a outlet pipe, an aeration pipe, a backwash air pipe, and filter material, and also includes a support frame unit arranged on the bottom surface of the tank body, a perforated lower filter unit arranged on the support frame unit and used to support the filter material, a rotating ring unit arranged on the support frame unit and used to seal the perforated lower filter unit, and an upper filter unit arranged in the tank body and used to engage and fix the rotating ring unit.

[0011] A further preferred technical solution is that the support frame unit includes two groups of support columns arranged on the bottom surface of the pool body and located on both sides of the downpipe, aeration pipe and backwash air pipe, and an external threaded ring arranged on the upper end surface of the support column and used to screw the rotating ring unit and support the open hole lower filter unit.

[0012] A further preferred technical solution is that the perforated lower filter screen unit includes a rectangular lower filter screen and openings provided on the rectangular lower filter screen and used for discharging the filter material downward.

[0013] A further preferred technical solution is that the rotating ring unit includes an internal threaded ring arranged on the external threaded ring, and a circular ring arranged on the internal threaded ring and used to seal the opening.

[0014] A further preferred technical solution is that the rotating ring unit further includes a rotating toggle rod provided on the upper surface of the circular ring and passing through the opening.

[0015] A further preferred technical solution is that the upper filter unit includes a rectangular upper filter provided on the filter material, and a fixing hole provided on the rectangular upper filter and used for inserting the rotating toggle rod.

[0016] A further preferred technical solution is that the perforated lower filter unit also includes a protruding ring arranged on the lower surface of the rectangular lower filter, and the outer edge of the lower surface is inclined downward, the opening passes downward through the protruding ring; the outer edge of the circular ring is inclined downward.

[0017] A further preferred technical solution is that the rotating ring unit further includes an annular mesh cloth provided on the outer ring surface of the internal threaded ring and located below the circular ring for dividing air and buffering falling filter material.

[0018] A further preferred technical solution is that the outer side of the annular mesh cloth is inclined downward.

[0019] A further preferred technical solution is that the openings are in the shape of a fan ring and there are 3 or 4 openings in number. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 It is a structural schematic diagram of a filter tank in the prior art.

[0022] Figure 3 Schematic diagram of the position structure of the support frame unit in the present invention.

[0023] Figure 4 Schematic diagram of the position and shape of the support column in the present invention.

[0024] Figure 5 Schematic diagram of the position structure of the rotating ring unit in the present invention.

[0025] Figure 6 It is a schematic structural diagram of the perforated lower filter unit of the present invention from a top view.

[0026] Figure 7 Schematic diagram of the structure of the protruding ring in the present invention.

[0027] Figure 8 It is a structural schematic diagram of the upper filter unit in the present invention.

[0028] In the figure, the meanings of the marks are as follows:

[0029] Upper fixed filter a, lower fixed filter b;

[0030] Pool body 10, water supply pipe 11, water supply pipe 12, aeration pipe 13, backwashing air pipe 14, filter material 15;

[0031] Support frame unit 1, open bottom filter unit 2, rotating ring unit 3, upper filter unit 4;

[0032] Support column 101 , external thread ring 102 , rectangular lower filter 201 , opening 202 , internal thread ring 301 , circular ring 302 , rotary toggle rod 303 , rectangular upper filter 401 , fixing hole 402 , protruding ring 203 , circular mesh 304 . DETAILED DESCRIPTION

[0033] The following description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

[0034] As attached Figure 1-8 As shown, a filter tank facility for upgrading and transforming a sewage treatment plant has a structure including a tank body 10, an inlet pipe 11, a outlet pipe 12, an aeration pipe 13, a backwash air pipe 14, and filter material 15, and also includes a support frame unit 1 arranged on the bottom surface of the tank body 10, a perforated lower filter unit 2 arranged on the support frame unit 1 and used to support the filter material 15, a rotating ring unit 3 arranged on the support frame unit 1 and used to seal the perforated lower filter unit 2, and an upper filter unit 4 arranged in the tank body 10 and used to engage and fix the rotating ring unit 3.

[0035] In this embodiment, the filter facility is essentially an aerated biological pond, where wastewater treatment microorganisms are attached to the filter media 15. The pond body 10 is rectangular in shape, with a primary sedimentation tank upstream, eliminating the need for a sedimentation tank downstream. This is one of the advantages of a biological aerated pond.

[0036] In addition, the upper water pipe 11 is used to add untreated sewage or discharge backwash water, and the lower water pipe 12 is used to discharge treated water or add backwash water. The lower water pipe 12 is provided with more and larger openings to ensure faster discharge of treated water. The openings are also the location for replacing and discharging the filter material 15.

[0037] In addition, the upper filter unit 4 is snap-fitted and installed, and the perforated lower filter unit 2 is screwed or welded to ensure that the filter material 15 is fully and appropriately fixed. If the former is not removed, the rotating ring unit 3 cannot rotate, so as to avoid accidental rotation of the rotating ring unit 3 and accidental falling of the filter material 15.

[0038] Finally, in this filter tank facility, the filter material 15 is added by opening the upper filter unit 4 and then pouring it out, while the discharge method is that the rotating ring unit 3 first descends and then automatically discharges it at the sewer pipe 12. Therefore, the entire filter material replacement operation is more convenient, fast and efficient.

[0039] The support frame unit 1 includes two groups of support columns 101 arranged on the inner bottom surface of the pool body 10 and located on both sides of the downpipe 12, the aeration pipe 13 and the backwash air pipe 14, and an external threaded ring 102 arranged on the upper end surface of the support column 101 and used to screw the rotating ring unit 3 and support the open hole lower filter unit 2.

[0040] In this embodiment, there are four support columns 101, two on each side, which are used to engage, secure, or further reinforce the downcomer pipe 12, aeration pipe 13, and backwash pipe 14. The perforated lower filter unit 2 can simply be mounted on the externally threaded ring 102, which also ensures sufficient secure installation, which is very convenient.

[0041] The perforated lower filter unit 2 includes a rectangular lower filter 201 and openings 202 provided on the rectangular lower filter 201 and used for discharging the filter material 15 downward.

[0042] In this embodiment, the rectangular lower filter screen 201 and the upper filter screen unit 4 are made of metal or resin mesh with sufficient strength to ensure that the filter material 15 is fully supported and pressed.

[0043] Furthermore, when the filter tank is in use, the rotating ring unit 3 always clings to the lower surface of the rectangular lower filter screen 201, thereby blocking the opening 202 and preventing the filter material 15 from accidentally falling out. After the filter material 15 has completed its lifespan, the rotating ring unit 3 rotates downward, exposing the opening 202, ensuring that the filter material 15 can be quickly removed and replaced, which is very convenient.

[0044] In addition, the rectangular lower filter screen 201 can also be screwed and snap-fitted to the inner side surface of the pool body 10 for reinforcement. After all, under normal use, the rectangular lower filter screen 201 does not need to be disassembled.

[0045] The rotating ring unit 3 includes an internal thread ring 301 disposed on the external thread ring 102 , and a circular ring 302 disposed on the internal thread ring 301 and used to seal the opening 202 .

[0046] In this embodiment, the vertical projection of the opening 202 falls entirely on the circular ring 302 . Before the internal thread ring 301 rotates to the highest point on the external thread ring 102 , the circular ring 302 has already fully compressed and sealed the opening 202 .

[0047] The rotating ring unit 3 further includes a rotating lever 303 disposed on the upper surface of the circular ring 302 and passing through the opening 202 .

[0048] In this embodiment, the replacement operation of the filter material 15 is essentially a lowering and then raising operation of the internal thread ring 301, that is, the latter needs to be reversed first and then rotated forward, and the rotating toggle rod 303 is the force-applying part of the rotation of the internal thread ring 301.

[0049] Of course, the following two points should be noted in this process:

[0050] First, the rotating lever 303 can only be rotated after the upper filter unit 4 is taken out upwards. The former can prevent the latter from accidentally rotating and play the role of "accidental touch";

[0051] Second, when selecting the material, shape, size, and quantity of the filter material 15, the ease with which the rotating lever 303 can rotate and move inside the filter material 15 must also be considered. In other words, the filter material 15 cannot be compressed too densely to ensure that the rotating lever 303 can rotate.

[0052] On the other hand, the shape and size of the opening 202 cannot hinder the normal rotation of the rotary toggle rod 303, so its size can be appropriately larger.

[0053] The upper filter unit 4 includes a rectangular upper filter 401 provided on the filter material 15 , and a fixing hole 402 provided on the rectangular upper filter 401 and used for inserting the rotating toggle rod 303 .

[0054] In this embodiment, the rectangular upper filter 401 is engaged with the inner side surface of the pool body 10 , which can be provided with necessary blocks, and the position of the fixing hole 402 corresponds to the starting position of the rotating toggle rod 303 .

[0055] In other words, the rectangular upper filter screen 401 can be fastened downward and installed only when the internal thread ring 301 is rotated upward and tightened into place. This "in place" state means that the circular ring 302 fully blocks the opening 202.

[0056] The perforated lower filter unit 2 further includes a protruding ring 203 provided on the lower surface of the rectangular lower filter 201 and with the outer side of the lower surface tilted downward. The opening 202 passes downward through the protruding ring 203; the outer side of the circular ring 302 tilts downward.

[0057] In this embodiment, the vertical cross-section of the protruding ring 203 is a trapezoid, which is "thick outside and thin inside", corresponding to the "low outside and high inside" of the circular ring 302, ensuring that when the filter material 15 is discharged and replaced, it is not easy to remain on the circular ring 302, nor is it easy to get stuck between the rectangular lower filter screen 201 and the internal threaded ring 301.

[0058] In other words, the inclination angle of the lower surface of the protruding ring 203 is consistent with the inclination angle of the circular ring 302, ensuring that the latter can be entirely attached to the protruding ring 203, that is, the opening 202 is completely and safely blocked, and the filter material 15 will not fall accidentally.

[0059] The rotating ring unit 3 further includes an annular mesh cloth 304 disposed on the outer surface of the internal threaded ring 301 and located below the circular ring 302 for dividing air and buffering falling filter materials.

[0060] In this embodiment, the annular mesh 304 includes a mesh and radial support rods to ensure that it can be smoothly unfolded and tightened. It has two functions:

[0061] First, the "large bubbles" discharged from the aeration pipe 13 are further divided into "small bubbles" to ensure that the microorganisms on the filter material 15 can fully perform aerobic respiration, thereby improving the water purification capacity of the microorganisms;

[0062] Secondly, the “old filter material” discharged from the falling filter is buffered to prevent it from damaging the sewer pipe 12 , the aeration pipe 13 , and the backwashing air pipe 14 .

[0063] In addition, it should be noted that when the filter material 15 is discharged and replaced, water needs to be added to the upper water pipe 11 to ensure that the waste filter material 15 can be completely flushed into the lower water pipe 12 with holes and finally discharged and replaced.

[0064] The outer side of the annular mesh cloth 304 is inclined downward.

[0065] In this embodiment, the circular mesh 304 is designed to prevent a large amount of waste filter material from being trapped. Therefore, its shape is "low on the outside and high on the inside" to ensure that the filter material can completely roll down. Furthermore, the mesh size of the circular mesh 304 is significantly smaller than the size of the filter material 15, ensuring that the filter material 15 completely rolls down rather than getting stuck on the circular mesh 304.

[0066] The openings 202 are in the shape of a fan ring and are 3 or 4 in number.

[0067] In this embodiment, the number of the rotating toggle rods 303 is less than or equal to the openings 202, and the latter's fan-shaped space ensures that the rotating toggle rods 303 and the entire rotating ring unit 3 have a sufficient descending amplitude after rotation, ensuring that the filter material to be replaced can fall completely and quickly at the sufficiently open opening 202.

[0068] While the embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to the aforementioned embodiments. Various modifications are possible within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. These modifications are non-inventive and are protected by patent law as long as they fall within the scope of the claims of the present invention.

Claims

1. A filter tank facility for upgrading a sewage treatment plant, comprising a tank body (10), an inlet pipe (11), a outlet pipe (12), an aeration pipe (13), a backwashing pipe (14), and filter material (15), characterized in that: The filter further comprises a support frame unit (1) arranged on the inner bottom surface of the tank body (10), a perforated lower filter screen unit (2) arranged on the support frame unit (1) and used to support the filter material (15), a rotating ring unit (3) arranged on the support frame unit (1) and used to block the perforated lower filter screen unit (2), and an upper filter screen unit (4) arranged in the tank body (10) and used to engage and fix the rotating ring unit (3). The support frame unit (1) comprises two groups of support columns (101) arranged on the inner bottom surface of the tank body (10) and located on both sides of the downpipe (12), the aeration pipe (13) and the backwashing air pipe (14), and an external threaded ring (102) arranged on the upper end surface of the support column (101) and used for screwing the rotating ring unit (3) and supporting the open hole lower filter unit (2). The perforated lower filter screen unit (2) comprises a rectangular lower filter screen (201), and an opening (202) provided on the rectangular lower filter screen (201) and used for discharging the filter material (15) downwards. The rotating ring unit (3) comprises an internal threaded ring (301) arranged on the external threaded ring (102), and a circular ring (302) arranged on the internal threaded ring (301) and used to seal the opening (202).

2. The filter tank facility for upgrading a sewage treatment plant according to claim 1, characterized in that: The rotating ring unit (3) further comprises a rotating toggle rod (303) arranged on the upper surface of the circular ring (302) and passing through the opening (202).

3. The filter tank facility for upgrading a sewage treatment plant according to claim 2, characterized in that: The upper filter screen unit (4) comprises a rectangular upper filter screen (401) provided on the filter material (15), and a fixing hole (402) provided on the rectangular upper filter screen (401) and used for inserting the rotating toggle rod (303).

4. The filter tank facility for upgrading a sewage treatment plant according to claim 1, characterized in that: The perforated lower filter screen unit (2) further comprises a protruding ring (203) provided on the lower surface of the rectangular lower filter screen (201), the outer edge of the lower surface being inclined downward, the opening (202) passing downward through the protruding ring (203); and the outer edge of the circular ring (302) is inclined downward.

5. The filter tank facility for upgrading a sewage treatment plant according to claim 1, characterized in that: The rotating ring unit (3) further comprises a circular ring mesh (304) arranged on the outer ring surface of the internal threaded ring (301) and located below the circular ring (302) and used for dividing air and buffering falling filter material.

6. The filter tank facility for upgrading a sewage treatment plant according to claim 5, characterized in that: The outer side of the circular mesh cloth (304) is inclined downward.

7. The filter tank facility for upgrading a sewage treatment plant according to claim 1, characterized in that: The openings (202) are in the shape of a fan ring and are 3 or 4 in number.

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