Preliminary filtering device for sewage treatment

Abstract

The utility model discloses a sewage treatment preliminary filtering device which comprises a filtering box, the rear part of the filtering box is connected with a flushing box, the front part of the filtering box is provided with a sewage receiving box, one side of the top of the filtering box is provided with a water inlet, and the inner upper part of the filtering box is provided with an obliquely arranged filtering plate; flow guide boxes are installed on the two sides, close to the lower portion of the filter plate, of the interior of the filter box, a plurality of C-shaped filter screens are installed between the two flow guide boxes at equal intervals, the longitudinal length of the C-shaped filter screens is consistent with the distance between the front wall and the rear wall of the interior of the filter box, and a drainage pipe is installed on one side, close to the bottom, of the filter box; the top surfaces of the two flow guide boxes are inclined towards the middle of the interior of the filter box. The multi-filtering effect is achieved, and the surface of the filtering net can be conveniently cleaned.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment, in particular to a preliminary filtering device for sewage treatment. Background Art

[0002] Rural sewage has become a major component of water pollution due to its scattered locations, large population, and difficulty in collection. There are also large amounts of organic matter and inorganic salts such as nitrogen and phosphorus in rural sewage. During treatment, the sewage needs to be initially filtered in order to initially remove impurities such as garbage from the sewage.

[0003] At present, the existing sewage treatment preliminary filtration devices, when used for sewage preliminary filtration treatment, basically adopt a one-time filtration method for preliminary filtration treatment, and the filtration effect is relatively general, which affects the subsequent treatment progress of the sewage. Utility Model Content

[0004] The purpose of the utility model is to provide a preliminary filtering device for sewage treatment, and the utility model effectively solves the technical problems raised in the background technology.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A preliminary filtration device for sewage treatment comprises a filter box, a flushing box is connected to the rear of the filter box, a sewage receiving box is installed at the front of the filter box, a water inlet is opened on one side of the top of the filter box, and an obliquely arranged filter plate is installed on the upper part of the filter box, guide boxes are installed on both sides of the filter box below the filter plate, and a plurality of C-type filter screens are installed equidistantly between the two guide boxes.

[0007] As a further solution of the utility model, the longitudinal length of the C-type filter screen is consistent with the distance between the front and rear walls inside the filter box, and a drain pipe is installed on one side of the filter box near the bottom.

[0008] As a further solution of the utility model, the top surfaces of the two flow guide boxes are inclined toward the inner middle of the filter box.

[0009] As a further solution of the utility model, a sewage outlet is provided on the other side of the filter box, and a switch door is installed on the sewage outlet through a hinge.

[0010] As a further solution of the utility model, the connection surfaces of the flushing box, the dirt receiving box and the filter box are all embedded with pull-out plates, and a pull block is installed in the middle of the top surface of the pull-out plate.

[0011] As a further solution of the utility model, a water inlet pipe is installed inside the flushing box, three C-shaped pipes are installed at the bottom of the water inlet pipe, and a plurality of nozzles are installed at equal intervals outside the C-shaped pipe.

[0012] As a further solution of the present utility model, the C-type tube has the same curvature as the C-type filter screen, the sewage receiving box is L-shaped, and the inner bottom surface of the sewage receiving box is equipped with a guide plate with an oblique curved surface. After the pull-out plates embedded in the flushing box and the sewage receiving box are pulled out, the flushing box and the sewage receiving box are interconnected with the interior of the filter box.

[0013] Beneficial effects of the utility model:

[0014] The utility model provides a plurality of C-type filter screens, which are C-shaped and have an arc surface, so that the sewage filtering area can be increased and the filtering effect can be improved. After the sewage is filtered through the filter plate, it can be filtered twice each time it passes through a C-type filter screen, so that multiple filtering operations can be performed during the initial filtration of the sewage by using multiple C-type filter screens, which greatly improves the filtering effect.

[0015] With the C-type tube and the nozzle, after the flushing water enters the C-type tube, it is sprayed out from each nozzle. Because the C-type tube and the C-type filter have the same curvature, the nozzle can be used to flush the surface of each C-type filter, thereby flushing away the dirt on the surface of the C-type filter, making it convenient to clean the surface of the C-type filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 It is a cross-sectional view of the filter box of the present utility model.

[0019] Figure 3 It is a cross-sectional view of the flushing box in the utility model.

[0020] Figure 4 It is a cross-sectional view of the sewage box in the utility model.

[0021] Figure 5 For this utility model Figure 1 Enlarged view of area a in the middle.

[0022] In the figure: 1. Filter box; 2. Flushing box; 3. Sewage collecting box; 4. Water inlet; 5. Filter plate; 6. Guide box; 7. C-type filter screen; 8. C-type pipe; 9. Nozzle; 10. Guide plate; 11. Pull-out plate. DETAILED DESCRIPTION

[0023] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1-5 As shown, a preliminary filtration device for sewage treatment includes a filter box 1, a flushing box 2 is connected to the rear of the filter box 1, and a sewage receiving box 3 is installed at the front of the filter box 1, a water inlet 4 is opened on one side of the top of the filter box 1, and an obliquely arranged filter plate 5 is installed at the top of the filter box 1, and guide boxes 6 are installed on both sides of the inside of the filter box 1 below the filter plate 5, and a plurality of C-type filter screens 7 are installed equidistantly between the two guide boxes 6.

[0025] The longitudinal length of the C-type filter screen 7 is consistent with the distance between the front and rear walls of the filter box 1. A drainage pipe is installed on one side of the filter box 1 near the bottom.

[0026] After the sewage is filtered once by the filter plate 5, it can be filtered again by passing through a plurality of C-type filter screens 7 in sequence, thereby improving the effect of the initial filtering.

[0027] The top surfaces of the two flow guide boxes 6 are both inclined toward the inner middle of the filter box 1 .

[0028] A sewage outlet is provided on the other side of the filter box 1, and a switch door is installed on the sewage outlet through a hinge.

[0029] The guide box 6 can be provided to conveniently guide the sewage to the C-type filter screen 7 for re-filtration, and the garbage on the filter plate 5 can be cleaned through the sewage outlet after the switch door is opened.

[0030] The connection surfaces of the flushing box 2 and the dirt receiving box 3 with the filter box 1 are all embedded with a pull-out plate 11 , and a pull block is installed in the middle of the top surface of the pull-out plate 11 .

[0031] The pull-out plate 11 is provided to seal the flushing box 2 and the sewage receiving box 3 to prevent sewage from flowing into the flushing box 2 and the sewage receiving box 3 during sewage filtering.

[0032] A water inlet pipe is installed inside the flushing box 2, three C-shaped pipes 8 are installed at the lower part of the outside of the water inlet pipe, and a plurality of spray heads 9 are installed at equal intervals outside the C-shaped pipe 8.

[0033] The C-shaped tube 8 has the same curvature as the C-shaped filter screen 7, the dirt receiving box 3 is L-shaped, and the inner bottom surface of the dirt receiving box 3 is installed with a guide plate 10 with an oblique curved surface. After the pull-out plate 11 embedded in the flushing box 2 and the dirt receiving box 3 is pulled out, the flushing box 2 and the dirt receiving box 3 are interconnected with the interior of the filter box 1.

[0034] A preliminary filtering device for sewage treatment, when in use, sewage is put into the interior of the filter box 1 from the water inlet 4, the sewage first passes through the filter plate 5 for preliminary filtering treatment, then is guided by two guide boxes 6, and the sewage passes through a number of C-type filter screens 7 in turn for re-filtration treatment, the filtered sewage gathers at the bottom of the filter box 1, and can be discharged from the drain pipe for the next step of treatment.

[0035] After the filtering operation is completed, the pull-out plates 11 on the dirt receiving box 3 and the flushing box 2 can be pulled out, so that the dirt receiving box 3 and the flushing box 2 are connected to the interior of the filter box 1. At this time, flushing water can be injected through the water inlet pipe, and the flushing water is diverted to each C-type tube 8 through the water inlet pipe, and then sprayed out from each nozzle 9 outside each C-type tube 8, and the surface of each C-type filter screen 7 is flushed in turn, so that the dirt on the surface of the C-type filter screen 7 can be flushed away, and the flushed dirt enters the interior of the dirt receiving box 3, and then is diverted from the guide plate 10 to the bottom side of the dirt receiving box 3 and sent out. Part of the flushing water is filtered by the C-type filter screen 7 and discharged to the lower part of the filter box 1, and part of it enters the dirt receiving box 3 and is discharged together with the dirt, thereby achieving the cleaning treatment of the surface of the C-type filter screen 7.

[0036] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A preliminary filtration device for sewage treatment, comprising a filter box (1), characterized in that: The rear of the filter box (1) is connected to a flushing box (2), and a dirt receiving box (3) is installed at the front of the filter box (1); a water inlet (4) is opened on one side of the top of the filter box (1), and an obliquely arranged filter plate (5) is installed on the top of the filter box (1); guide boxes (6) are installed on both sides of the filter box (1) below the filter plate (5), and a plurality of C-type filter screens (7) are installed equidistantly between the two guide boxes (6).

2. A preliminary filtration device for sewage treatment according to claim 1, characterized in that: The longitudinal length of the C-shaped filter screen (7) is consistent with the distance between the front and rear walls of the filter box (1), and a drainage pipe is installed on one side of the filter box (1) close to the bottom.

3. A preliminary filtration device for sewage treatment according to claim 1, characterized in that: The top surfaces of the two flow guide boxes (6) are both inclined toward the inner middle of the filter box (1).

4. A preliminary filtration device for sewage treatment according to claim 1, characterized in that: A sewage outlet is provided on the other side of the filter box (1), and a switch door is installed on the sewage outlet via a hinge.

5. A preliminary filtration device for sewage treatment according to claim 1, characterized in that: The connection surfaces of the flushing box (2) and the dirt receiving box (3) with the filter box (1) are all embedded with a pull-out plate (11), and a pull block is installed in the middle of the top surface of the pull-out plate (11).

6. A preliminary filtration device for sewage treatment according to claim 5, characterized in that: A water inlet pipe is installed inside the flushing box (2), three C-shaped pipes (8) are installed outside the water inlet pipe at the bottom, and a plurality of spray heads (9) are installed at equal intervals outside the C-shaped pipe (8).

7. A preliminary filtration device for sewage treatment according to claim 6, characterized in that: The C-shaped tube (8) has the same curvature as the C-shaped filter screen (7); the dirt receiving box (3) is arranged in an L-shape, and a guide plate (10) arranged in an oblique curved surface is installed on the inner bottom surface of the dirt receiving box (3); after the pull-out plates (11) embedded in the flushing box (2) and the dirt receiving box (3) are pulled out, the flushing box (2) and the dirt receiving box (3) are both communicated with the interior of the filter box (1).

Images