A filter with a material escape prevention device

Abstract

A filter with a material escape prevention device relates to a sewage treatment process, comprising a tank body and a water inlet and outlet, wherein a first material escape prevention device is arranged above the water inlet and outlet, the first material escape prevention device comprising a first cylinder body, the lower end of the first cylinder body being connected to a first lower sealing plate, the first lower sealing plate being provided with a center hole and being connected to a first filter pipe, the first filter pipe being connected to the water inlet and outlet; a first filter basket limiting ring being connected within the first cylinder body, the first filter basket limiting ring separating the first cylinder body into a first filter area and a first non-filter area; a first filter basket being arranged within the first filter area, the first filter basket being arranged above the first filter basket limiting ring, the lower end of the first filter basket being provided with an opening, a first upper cover being arranged above the first filter basket, the first upper cover being connected to the upper end of the first cylinder body; a filter water inlet pipe and a backwash water outlet pipe being connected to the side wall of the first cylinder body. The present invention can prevent light filter material from being blocked and filter material from being lost during backwashing.

Description

Technical Field

[0001] The invention relates to a sewage treatment process, in particular to a filter structure. Background Art

[0002] Filters are typically connected to downstream equipment such as inclined plate degreasers, flotation systems, or hydrocyclones to further refine the wastewater's rough separation process. After the wastewater enters the filter, the filter's inlet water distribution typically uses a screen tube (net) or a bell-shaped uniform water distributor. The screen tube (net) structure is typically located within the tank. During backwashing, this structure can cause lightweight filter media to clog the screen tube (net), making it inconvenient to access the tank for maintenance. Bell-shaped uniform water distributors can also easily cause filter media to leak during backwashing. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a filter with an anti-escape device, which can prevent light filter media from being blocked and lost during backwashing.

[0004] The object of the present invention is achieved as follows: a filter with an anti-escape device comprises a tank body, a water inlet and outlet are connected to the top of the tank body, a first anti-escape device is arranged above the water inlet and outlet, the first anti-escape device comprises a vertical first cylinder body, the lower end of the first cylinder body is connected to a first lower sealing plate, the first lower sealing plate is provided with a center hole, and a first filter pipe is connected to the center hole, the first filter pipe is connected to the water inlet and outlet; a first filter basket limiting ring is connected in the first cylinder body, the first filter basket limiting ring separates the first cylinder body into a first filtering area and a first non-filtering area The first filter area is connected to the first non-filter area through the inner hole of the first filter basket limiting ring; a first filter basket is arranged in the first filter area, and the first filter basket is arranged above the first filter basket limiting ring. The lower end of the first filter basket is provided with an opening, and the opening of the first filter basket is connected to the inner hole of the first filter basket limiting ring. A first upper cover is arranged above the first filter basket, and the first upper cover is connected to the upper end of the first cylinder; a filtration water inlet pipe and a backwash water outlet pipe are connected to the side wall of the first cylinder, the filtration water inlet pipe is connected to the first non-filter area, and the backwash water outlet pipe is connected to the first filtration area.

[0005] Furthermore, an oil drain port is connected to the backwash water outlet pipe.

[0006] Furthermore, the first filter basket limiting ring is arranged obliquely, the high end of the first filter basket limiting ring is located above the filtration water inlet pipe, and the low end of the first filter basket limiting ring is located below the backwash water outlet pipe; the lower end opening of the first filter basket is an oblique opening, and the inclination of the oblique opening is consistent with the inclination of the first filter basket limiting ring.

[0007] Furthermore, a first partition is connected inside the first filter basket, a first through hole is provided on the first filter basket above the first partition, and multiple groups of first overpressure discharge mechanisms are provided on the first partition, the first overpressure discharge mechanism including a first discharge hole, a first spring, a first spring seat, a first overpressure relief disc and a first bolt; the first discharge hole is provided on the first partition, the first spring is provided below the first partition, the first spring seat is provided below the first spring, and a first through hole is also provided on the first partition, the first bolt passes through the first spring seat, the first spring and the first through hole of the first partition in sequence and then connects to the first overpressure relief disc, the first overpressure relief disc covers the first discharge hole, and the first nut is threadedly connected to the first bolt above the first overpressure relief disc.

[0008] Furthermore, the diameter of the first bolt is slightly smaller than the diameter of the first through-hole of the first partition.

[0009] Furthermore, a handle is connected to the upper surface of the first upper cover plate.

[0010] Furthermore, an oil drain interface is also connected to the top of the tank body, and a second anti-escape device is arranged above the oil drain interface, and the second anti-escape device includes a vertical second cylinder, the lower end of the second cylinder is connected to the second lower sealing plate, the second lower sealing plate is provided with a center hole, and the second filter pipe is connected at the center hole, and the second filter pipe is connected to the oil drain interface; a second filter basket limiting ring is connected in the second cylinder, the second filter basket limiting ring divides the second cylinder into a second filtering area and a second non-filtering area, and the second filtering area and the second non-filtering area are connected through the inner hole of the second filter basket limiting ring; a second filter basket is arranged in the second filtering area, and the second filter basket is arranged above the second filter basket limiting ring, the lower end of the second filter basket is provided with an opening, and the opening of the second filter basket is connected to the inner hole of the second filter basket limiting ring, and a second upper cover plate is arranged above the second filter basket, and the second upper cover plate is connected to the upper end of the second cylinder; an oil drain pipe is connected on the side wall of the second cylinder, and the oil drain pipe is connected to the second filtering area.

[0011] Furthermore, a second partition is connected in the second filter basket, a second through hole is provided on the second filter basket above the second partition, and multiple groups of second overpressure discharge mechanisms are provided on the second partition, the second overpressure discharge mechanism includes a second discharge hole, a second spring, a second spring seat, a second overpressure relief disc and a second bolt; the second discharge hole is provided on the second partition, the second spring is provided below the second partition, the second spring seat is provided below the second spring, and a second through hole is also provided on the second partition, the second bolt passes through the second spring seat, the second spring and the second through hole of the second partition in sequence and then connects to the second overpressure relief disc, the second overpressure relief disc covers the second discharge hole, and the second nut is threadedly connected to the second bolt above the second overpressure relief disc.

[0012] The beneficial effects of the present invention are as follows: during normal filtration, the incoming water enters the filter water inlet pipe of the first anti-material leakage device through external valve control, and then enters the trumpet-shaped homogenizing water distributor inside the tank body through the first filter pipe and the water inlet and outlet of the tank body. When the filter is backwashing, the backwash water enters the tank body through external valve control, and the filter material in the backwash water is intercepted by the "inverted" filter basket to prevent the filter from leaking material, and the water is discharged from the backwash water outlet pipe. When the backwash is completed, part of the filter material intercepted on the filter basket will fall back into the filter under the action of gravity. After running for a period of time, open the upper cover of the device, take out the filter basket, clean it thoroughly, and then reinstall it. This avoids blockage and loss of filter material and ensures the filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the first structure of the present invention.

[0014] Figure 2 for Figure 1 Schematic diagram of the first structure of the first anti-material escape device.

[0015] Figure 3 This is a schematic diagram of normal filtering.

[0016] Figure 4 This is a schematic diagram of backwashing.

[0017] Figure 5 This is a schematic diagram of the second structure of the first anti-material escape device.

[0018] Figure 6 for Figure 5 Partial schematic diagram.

[0019] Figure 7 for Figure 6 Enlarged view of part I in the middle.

[0020] Figure 8 This is a schematic diagram of the third structure of the present invention.

[0021] Figure 9 for Figure 8 Schematic diagram of the structure of the second anti-escape device.

[0022] Figure 10 For Figure 9 Schematic diagram after the second overpressure relief mechanism is installed.

[0023] Figure 11 This is a fifth structural diagram of the present invention.

[0024] In the figure, 1 tank body, 2 filter material, 3 bottom water inlet and outlet, 4 manhole, 5 top water inlet and outlet, 6 first filter pipe, 7 filter water inlet pipe, 8 first cylinder, 9 first anti-escape device, 10 backwash outlet pipe, 11 water distributor, 12 handle, 13 first upper cover, 14 first filter basket, 15 first filter basket limiting ring, 16 first lower sealing plate, 17 first filter area, 18 first non-filter area, 19 water inlet control valve, 20 backwash outlet valve, 21 first overpressure discharge mechanism, 22 first partition, 2 3 First through hole, 24 First double nut, 25 First overpressure relief disc, 26 First relief hole, 27 First spring, 28 First spring seat, 29 First bolt, 30 First through hole, 31 Oil drain port, 32 Second anti-escape device, 33 Second cylinder, 34 Second lower sealing plate, 35 Second filter pipe, 36 Second filter basket limiting ring, 37 Second filtering area, 38 Second non-filtering area, 39 Second filter basket, 40 Second upper cover plate, 41 Oil drain pipe, 42 Second overpressure discharge mechanism, 43 Oil drain port. DETAILED DESCRIPTION

[0025] Example 1

[0026] like Figures 1 to 4 As shown, it is the first filter with an anti-escape device, including a tank body 1, a manhole 4 is provided on the side wall of the tank body 1 and is connected to a sealing door, the top of the tank body 1 is connected to the top water inlet and outlet 5, and the bottom is connected to the bottom water inlet and outlet 3, filter material 2 is arranged in the tank body 1, and a water distributor 11 is connected to the top of the tank body 1, and the water distributor 11 is located below the top water inlet and outlet 5.

[0027] A first anti-escape device 9 is arranged above the top water inlet and outlet 5. The first anti-escape device 9 includes a vertical first cylinder 8. The lower end of the first cylinder 8 is connected to a first lower sealing plate 16. The first lower sealing plate 16 is provided with a center hole and is connected to a first filter pipe 6 at the center hole. The first filter pipe 6 is connected to the top water inlet and outlet 5.

[0028] A first filter basket retaining ring 15 is connected within the first cylinder 8. This ring divides the first cylinder 8 into a first filter area 17 and a first non-filter area 18. The first filter area 17 and the first non-filter area 18 are connected via the inner hole of the first filter basket retaining ring 15. A filter water inlet pipe 7 and a backwash water outlet pipe 10 are connected to the sidewall of the first cylinder 8. The filter water inlet pipe 7 is connected to the first non-filter area 18, and the backwash water outlet pipe 10 is connected to the first filter area 17. The first filter basket retaining ring 15 is arranged obliquely, with the upper end of the first filter basket retaining ring 15 located above the filter water inlet pipe 7 and the lower end of the first filter basket retaining ring 15 located below the backwash water outlet pipe 10.

[0029] A first filter basket 14 is disposed within the first filter area 17. The first filter basket 14 utilizes a metal or non-metal mesh structure and is bolted to the top of a first filter basket retaining ring 15. The lower end of the first filter basket 14 is provided with an oblique opening, the slope of which matches that of the first filter basket retaining ring 15. The oblique opening of the first filter basket 14 communicates with the inner bore of the first filter basket retaining ring 15, forming an "inverted" filter basket. A first upper cover plate 13 is disposed above the first filter basket 14 and is connected to the upper end of the first barrel 8. The first upper cover plate 13 presses against the first filter basket 14, and a handle 12 is attached to the upper surface of the first upper cover plate 13.

[0030] When filtering normally, such as Figure 3 As shown, open the water inlet control valve 19 and close the backwash outlet valve 20. The incoming water enters the filter water inlet pipe 7 of the first anti-escape device 9, without passing through the first filter basket 14, and then enters the water distributor 11 inside the tank body from the first filter pipe 6 and the top water inlet and outlet 5 of the tank body 1. After being filtered by the filter material 2, it is discharged from the bottom water inlet and outlet 3.

[0031] When the filter is backwashed, Figure 4 As shown, the water inlet control valve 19 is closed and the backwash outlet valve 20 is opened. After the backwash water enters the tank body 1 from the bottom water inlet and outlet 3, the filter material 2 in the backwash water is intercepted by the "inverted" first filter basket 14 to prevent the filter material from escaping. The water is then discharged from the backwash outlet pipe 10. When the backwash is completed, part of the filter material intercepted on the filter basket will fall back into the filter due to gravity.

[0032] After running for a period of time, open the upper cover 13 of the device, take out the filter basket, clean it thoroughly and then reinstall it.

[0033] The present invention has the following characteristics: 1) there is no resistance to the filtered water inlet; 2) an "inverted" filter basket is used, and part of the intercepted filter material will fall back into the filter by gravity; 3) the first anti-escape device 9 is externally placed, which increases the backwash protection height, greatly reduces the filter material in the backwash water, and is more convenient to operate and maintain.

[0034] Example 2

[0035] like Figures 5 to 7As shown, a first baffle 22 is connected to the first filter basket 14. A first through-hole 23 is provided on the first filter basket 14 above the first baffle 22. Multiple sets of first overpressure relief mechanisms 21 are provided on the first baffle 22. The first overpressure relief mechanisms 21 include a first relief hole 26, a first spring 27, a first spring seat 28, a first overpressure relief disc 25, and a first bolt 29. The first relief hole 26 is provided on the first baffle 22, the first spring 27 is provided below the first baffle 22, and the first spring seat 28 is provided below the first spring 27. A first through-hole 30 is also provided on the first baffle 22. A first bolt 29 passes through the first spring seat 28, the first spring 27, and the first through-hole 30 of the first baffle 22 in sequence before connecting to the first overpressure relief disc 25. The first overpressure relief disc 25 covers the first relief hole 26. A first double nut 24 is threadedly connected to the first bolt 29 above the first overpressure relief disc 25. The diameter of the first bolt 29 is slightly smaller than the diameter of the first through-hole 30 of the first baffle 22.

[0036] When the filter material 2 or oil stains block the first filter basket 14 and are not cleaned in time, the first overpressure discharge mechanism 21 automatically opens according to the set spring force, that is, the first spring 27 is compressed, the first spring seat 28 and the first bolt 29 move upward, driving the first overpressure relief disc 25 to move upward, opening the first relief hole 26, and then the first through hole 23 allows the inside and outside of the first filter basket 14 to communicate, thereby starting the filter basket protection function.

[0037] The remaining structure, working process and principle are the same as those in Example 1.

[0038] Example 3

[0039] like Figure 8 and Figure 9 As shown, an oil drain interface 31 is also connected to the top of the tank body 1, and a second anti-escape device 32 is arranged above the oil drain interface 31. The second anti-escape device 32 includes a vertical second cylinder 33, and the lower end of the second cylinder 33 is connected to a second lower sealing plate 34. The second lower sealing plate 34 is provided with a center hole, and a second filter pipe 35 is connected at the center hole. The second filter pipe 35 is connected to the oil drain interface 31.

[0040] A second filter basket retaining ring 36 is connected to the second cylinder 33. This second filter basket retaining ring 36 divides the second cylinder 33 into a second filter area 37 and a second non-filter area 38. The second filter area 37 and the second non-filter area 38 are connected through the inner hole of the second filter basket retaining ring 36. A second filter basket 39 is disposed within the second filter area 37. Bolted above the second filter basket retaining ring 36, the lower end of the second filter basket 39 has an opening that communicates with the inner hole of the second filter basket retaining ring 36. A second upper cover plate 40 is disposed above the second filter basket 39 and is connected to the upper end of the second cylinder 33. An oil drain pipe 41 is connected to the side wall of the second cylinder 33 and communicates with the second filter area 37. The remaining structure is the same as in Example 1.

[0041] This method can usually be used for filters containing light filter media (such as walnut shells, anthracite, activated carbon, etc.), and is installed at the oil discharge interface to intercept the filter media and prevent it from escaping.

[0042] Example 4

[0043] like Figure 10 As shown, a second overpressure discharge mechanism 42 may also be installed in the second filter basket 39 . The structure and installation method of the second overpressure discharge mechanism 42 are the same as those of the first overpressure discharge mechanism 21 , and the rest of the structure is the same as that of Example 3.

[0044] Example 5

[0045] like Figure 11 As shown, an oil drain port 43 is connected to the backwash water outlet pipe 10, and the rest of the structure is the same as that of embodiment 1.

Claims

1. A filter with an anti-escape device, comprising a tank body, with a water inlet and outlet connected to the top of the tank body, characterized in that: A first material escape prevention device is provided above the water inlet and outlet, and the first material escape prevention device includes a vertical first cylinder, the lower end of the first cylinder is connected to a first lower sealing plate, the first lower sealing plate is provided with a center hole, and a first filter pipe is connected at the center hole, and the first filter pipe is connected to the water inlet and outlet; a first filter basket limiting ring is connected in the first cylinder, the first filter basket limiting ring divides the first cylinder into a first filtering area and a first non-filtering area, and the first filtering area and the first non-filtering area are connected through the inner hole of the first filter basket limiting ring; a first filter basket is provided in the first filtering area, the first filter basket is provided above the first filter basket limiting ring, the lower end of the first filter basket is provided with an opening, the opening of the first filter basket is connected to the inner hole of the first filter basket limiting ring, a first upper cover plate is provided above the first filter basket, and the first upper cover plate is connected to the upper end of the first cylinder; a filtration water inlet pipe and a backwash water outlet pipe are connected on the side wall of the first cylinder, the filtration water inlet pipe is connected to the first non-filtering area, and the backwash water outlet pipe is connected to the first filtration area; The first filter basket limiting ring is arranged obliquely, the high end of the first filter basket limiting ring is located above the filtration water inlet pipe, and the low end of the first filter basket limiting ring is located below the backwash water outlet pipe; the lower end opening of the first filter basket is an oblique opening, and the inclination of the oblique opening is consistent with the inclination of the first filter basket limiting ring; a first partition is connected to the first filter basket, a first through hole is provided on the first filter basket above the first partition, and multiple groups of first overpressure discharge mechanisms are provided on the first partition, the first overpressure discharge mechanism includes a first relief hole, a first spring, a first spring seat, a first overpressure relief disc and a first bolt; the first relief hole is provided on the first partition, the first spring is provided below the first partition, the first spring seat is provided below the first spring, and a first through hole is also provided on the first partition. The first bolt passes through the first spring seat, the first spring, and the first through hole of the first partition in sequence and then connects to the first overpressure relief disc. The first overpressure relief disc covers the first relief hole, and the first nut is threadedly connected to the first bolt above the first overpressure relief disc.

2. The filter with the anti-escape device according to claim 1, characterized in that: An oil drain port is connected to the backwash water outlet pipe.

3. The filter with the anti-escape device according to claim 1, characterized in that: The diameter of the first bolt is slightly smaller than the diameter of the first through hole of the first partition plate.

4. The filter with the anti-escape device according to claim 1, characterized in that: A handle is connected to the upper surface of the first upper cover plate.

5. The filter with anti-escape device according to claim 1, characterized in that: The top of the tank body is also connected to an oil drain interface, and a second anti-escape device is provided above the oil drain interface, and the second anti-escape device includes a vertical second cylinder, the lower end of the second cylinder is connected to the second lower sealing plate, the second lower sealing plate is provided with a center hole, and the second filter pipe is connected at the center hole, and the second filter pipe is connected to the oil drain interface; a second filter basket limiting ring is connected in the second cylinder body, the second filter basket limiting ring divides the second cylinder body into a second filtering area and a second non-filtering area, and the second filtering area and the second non-filtering area are connected through the inner hole of the second filter basket limiting ring; a second filter basket is provided in the second filtering area, and the second filter basket is provided above the second filter basket limiting ring, the lower end of the second filter basket is provided with an opening, and the opening of the second filter basket is connected to the inner hole of the second filter basket limiting ring, and a second upper cover plate is provided above the second filter basket, and the second upper cover plate is connected to the upper end of the second cylinder body; the oil drain pipe is connected on the side wall of the second cylinder body, and the oil drain pipe is connected to the second filtering area.

6. The filter with anti-escape device according to claim 5, characterized in that: A second partition is connected inside the second filter basket, a second through hole is provided on the second filter basket above the second partition, and multiple groups of second overpressure discharge mechanisms are provided on the second partition, the second overpressure discharge mechanism includes a second discharge hole, a second spring, a second spring seat, a second overpressure relief disc and a second bolt; the second discharge hole is provided on the second partition, the second spring is provided below the second partition, the second spring seat is provided below the second spring, and a second through hole is further provided on the second partition, the second bolt passes through the second spring seat, the second spring and the second through hole of the second partition in sequence and then connects to the second overpressure relief disc, the second overpressure relief disc covers the second discharge hole, and the second nut is threadedly connected to the second bolt above the second overpressure relief disc.

Images