Sewage filtering device

Abstract

The utility model belongs to the technical field of sewage filtering, and provides a sewage filtering device which comprises a filtering device shell, one end of the filtering device shell is further connected with a water inlet pipe, and a first partition plate and a second partition plate are further arranged on the inner side of the filtering device shell. The first partition plate and the second partition plate divide an inner cavity of the filtering device shell into a first space, a second space and a third space, and a gap exists between the first partition plate and the bottom wall of the filtering device shell for water flow to pass through; a filtering frame used for primary filtering is arranged on the inner side of the first space, a secondary filtering box is arranged in the third space, sewage is conveyed into the second space after being primarily filtered by the filtering frame, and the sewage enters the second space after large-particle impurities are completely filtered through the primary filtering of the first space, the second space and the third space; the grease on the upper layer enters the second-stage filter box along the conveying structure and is filtered again through the filter structure in the second-stage filter box, so that efficient oil-water separation is completed.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage filtration, and particularly relates to a sewage filtration device. Background Art

[0002] Food waste water is domestic waste generated by residents in the process of daily consumption. It is rich in organic matter and high in water content, which can reach 80%-95%. It is rich in multiple trace elements, nitrogen, phosphorus, potassium, calcium, etc. The nitrogen and phosphorus contents are respectively several thousand and several hundred milligrams per liter. It is also rich in oil, animal fat and vegetable oil. Oil exists in waste water in the form of dissolved oil, emulsion and suspension, which causes serious pollution and harm to the environment.

[0003] In the food wastewater treatment industry, due to the high oil content in food wastewater, oil is prone to inhibit biological treatment, which increases the difficulty of treatment and reduces resource utilization rate. However, at the same time, this type of oil can be reused and converted into more advanced products after formal treatment. Therefore, whether the oil and water in the wastewater can be effectively separated in the treatment of food wastewater will affect the subsequent process of oil treatment. Utility Model Content

[0004] The utility model provides a sewage filtering device, which solves the problems in the prior art.

[0005] The technical solution of the utility model is achieved in this way:

[0006] A sewage filtering device comprises a filtering device housing, one end of the filtering device housing is further connected to a water inlet pipe, a first partition plate and a second partition plate are further arranged inside the filtering device housing, the first partition plate and the second partition plate divide the inner cavity of the filtering device housing into a first space, a second space and a third space, and there is a gap between the first partition plate and the bottom wall of the filtering device housing for water to pass through;

[0007] A filter frame for primary filtration is provided inside the first space, and a secondary filter box is provided in the third space. The sewage is initially filtered by the filter frame and then transmitted to the second space. The upper grease part in the second space is transmitted to the secondary filter box for further filtration and then discharged.

[0008] Furthermore, the filter device housing includes a device body and a box cover connected to the device body.

[0009] Furthermore, two sets of sealing cover plates are fixedly arranged at the lower end of the box cover, and the two sets of sealing cover plates are respectively sealed at the upper ends of the first space and the second space.

[0010] Furthermore, a water outlet valve is provided at the lower end of the second space for discharging water in the second space.

[0011] Furthermore, a transmission structure is connected to the upper end of the secondary filter box, and an input end of the transmission structure is connected to the upper end of the second partition. The upper layer of grease in the second space enters from the input end of the transmission structure and is then discharged into the secondary filter box for secondary filtration.

[0012] Furthermore, the transmission structure includes a connecting pipe that is plugged into the inner side of the second partition, and the tail end of the connecting pipe is also connected to a transmission pipe. The outlet of the transmission pipe is connected to an electromagnetic valve A, and the outlet of the electromagnetic valve A is also connected to an oil inlet pipe. The oil inlet pipe is connected to the upper end of the secondary filter box and is used to transmit the upper layer of grease in the second space.

[0013] Furthermore, a filtering structure is also provided at the lower end of the secondary filter box, including an oil outlet pipe and a water outlet pipe for oil-water separation.

[0014] Furthermore, the oil outlet pipeline includes an oil outlet pipe connected to the lower end of the secondary filter box, and an oil-water separation diaphragm is also embedded at the inlet of the upper end of the oil outlet pipe.

[0015] Furthermore, the water outlet pipeline includes a water outlet pipe connected to the lower end of the secondary filter box, the upper end of the water outlet pipe is connected to the electromagnetic valve B, and a receiving pipe is also provided between the inlet of the electromagnetic valve B and the secondary filter box.

[0016] Furthermore, a pull ring is movably connected to the upper end of the filter frame, and a connecting frame is fixedly arranged along the side wall of the first space corresponding to the pull ring for placing the pull ring. Baffles 12 are fixedly arranged on both sides of the first space, abutting against the lower end of the frame edge of the filter frame 30.

[0017] After adopting the above technical solution, the beneficial effects of the utility model are:

[0018] 1. In the utility model, the first, second and third spaces are provided. After the large particles of impurities are filtered out through preliminary filtration in the first space, the sewage enters the second space, so that the grease in the upper layer enters the secondary filter box along the transmission structure, and then is filtered again through the filtration structure in the secondary filter box, thereby completing efficient oil-water separation;

[0019] 2. In the utility model, by providing a pull ring and a connecting frame, etc., after being used for a long time, the filter frame can be taken out through the pull ring, which is convenient for cleaning or replacing the filter frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 This is a schematic diagram of the cross-sectional structure of a sewage filtering device of the utility model;

[0022] Figure 2 This is a schematic diagram of the internal structure of a sewage filtering device of the utility model;

[0023] Figure 3 It is a schematic diagram of the connection structure between the oil outlet pipe and the secondary filter box.

[0024] In the figure, 10, device body; 11, water inlet pipe; 12, baffle; 13, first partition; 14, second partition; 15, connecting frame; 16, water outlet valve; 20, box cover; 21, sealing cover plate; 30, filter frame; 31, pull ring; 40, secondary filter box; 41, oil inlet pipe; 50, connecting pipe; 51, transmission pipe; 52, solenoid valve A; 60, water outlet pipe; 61, solenoid valve B; 62, receiving pipe; 70, oil outlet pipe; 71, oil-water separation diaphragm. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. 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.

[0026] Example:

[0027] like Figure 1 As shown, a sewage filtering device includes a filtering device housing, the filtering device housing includes a device body 10, a box cover 20 connected to the upper part of the device body 10, and a first partition 13 and a second partition 14 are arranged inside the device body 10. The first partition 13 and the second partition 14 divide the device body 10 from left to right into three spaces, wherein, as Figure 1As shown, a water inlet pipe 11 is connected through one side of the device body 10, and the first space is used to install a filter frame 30 for primary filtration. There is a gap between the first partition 13 and the bottom wall of the device body 10, so that the water filtered from the filter frame 30 enters the second space. Since grease floats on the water surface, a transmission structure for transmitting grease is provided along the upper part of the second partition 14. The grease floating on the water surface enters the secondary filter box 40 provided in the third space through the transmission structure, is filtered again by the secondary filter box 40, and is finally discharged. Figure 1 A water outlet assembly is also provided at the bottom of the second space shown;

[0028] like Figure 1 As shown, the transmission structure includes a connecting pipe 50 inserted into the upper part of the second partition 14, and the tail end of the connecting pipe 50 is connected with a transmission pipe 51, and the tail end of the transmission pipe 51 is connected with a solenoid valve A52, and the outlet of the solenoid valve A52 is connected with the secondary filter box 40, and the upper end of the secondary filter box 40 is also provided with an oil inlet pipe 41 corresponding to the solenoid valve A52. Since the grease is located in the upper layer, the water filtered by the filter frame 30 in the first space passes through the gap between the first partition 13 and the bottom wall of the device body 10 to enter the second space and fill it. After the solenoid valve A52 is opened, the grease floating on the upper layer will pass through the connecting pipe 50, the transmission pipe 51 and the oil inlet pipe 41 into the secondary filter box 40, where a large amount of grease can be taken away, but at the same time, part of the water flow will also enter the secondary filter box 40, so filtering is still required in the secondary filter box 40;

[0029] like Figure 2-3 As shown, a filtering structure is provided along the lower end of the secondary filter box 40, including a pipeline for oil outlet and a pipeline for water outlet, wherein the pipeline for oil outlet includes an oil outlet pipe 70 plugged into the inner side of the lower end of the secondary filter box 40, and an oil-water separation diaphragm 71 is also embedded at the outlet of the oil outlet pipe 70, so that only grease is allowed to enter the oil outlet pipe 70 for oil outlet, while water will be retained in the secondary filter box 40. After the oil outlet is completed, the remaining water is discharged through the water outlet pipe, wherein, as shown in FIG. Figure 2 As shown, the water outlet pipe includes a receiving pipe 62 connected to the lower end of the secondary filter box 40, and a solenoid valve B61 is also connected along the lower end of the receiving pipe 62. The lower end of the solenoid valve B61 is also connected to the water outlet pipe 60. After the grease in the secondary filter box 40 is completely discharged, the solenoid valve B61 is opened, so that the water in the secondary filter box 40 is discharged along the receiving pipe 62 and through the water outlet pipe 60, completing all the filtering processes;

[0030] like Figure 1 As shown, a water outlet valve 16 is also connected to the lower end of the second space, so that the water in the second space is discharged through the water outlet valve 16 at the bottom end;

[0031] like Figure 1 As shown, a sealing cover plate 21 is fixedly provided at the lower end of the box cover 20. After the box cover 20 is closed, the sealing cover plate 21 covers the upper ends of the first space and the second space to form a closed space to prevent water seepage.

[0032] like Figure 1 and 2 As shown, in order to facilitate the removal of the filter frame 30, a pull ring 31 is movably connected along the upper end of the filter frame 30, and a connecting frame 15 is fixedly installed on the inner side wall of the device body 10 corresponding to the pull ring 31, which is snapped at the lower edge of the pull ring 31. Baffles 12 are fixedly arranged on both sides of the first space, located at the lower end of the frame edge of the filter frame 30, so that the filter frame 30 is suspended. After the filter frame 30 has been used for a period of time, the pull ring 31 can be removed from the connecting frame 15, and the filter frame 30 can be taken out for cleaning or replacement.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sewage filtering device, comprising a filtering device housing, one end of the filtering device housing being further connected to a water inlet pipe (11), characterized in that: A first partition (13) and a second partition (14) are also provided on the inner side of the filter device housing, the first partition (13) and the second partition (14) divide the inner cavity of the filter device housing into a first space, a second space and a third space, and there is a gap between the first partition (13) and the bottom wall of the filter device housing for water to pass through; A filter frame (30) for primary filtration is arranged inside the first space, and a secondary filter box (40) is arranged inside the third space. Sewage is initially filtered by the filter frame (30) and then transferred to the second space. The upper grease portion in the second space is transferred to the secondary filter box (40) and filtered again before being discharged.

2. The sewage filtering device according to claim 1, characterized in that: The filter device housing comprises a device body (10) and a box cover (20) connected to the device body (10).

3. The sewage filtering device according to claim 2, characterized in that: Two sets of sealing cover plates (21) are also fixedly arranged at the lower end of the box cover (20), and the two sets of sealing cover plates (21) are respectively sealed at the upper ends of the first space and the second space.

4. The sewage filtering device according to claim 1, characterized in that: A water outlet valve (16) is also provided at the lower end of the second space for discharging water in the second space.

5. The sewage filtering device according to claim 1, characterized in that: The upper end of the secondary filter box (40) is also connected to a transmission structure, and the input end of the transmission structure is connected to the upper end of the second partition (14). Grease in the upper layer of the second space enters from the input end of the transmission structure and is then discharged into the secondary filter box (40) for secondary filtration.

6. The sewage filtering device according to claim 5, characterized in that: The transmission structure comprises a connecting pipe (50) plugged into the inner side of the second partition plate (14); the rear end of the connecting pipe (50) is also connected to a transmission pipe (51); the outlet of the transmission pipe (51) is connected to a solenoid valve A (52); the outlet of the solenoid valve A (52) is also connected to an oil inlet pipe (41); the oil inlet pipe (41) is connected to the upper end of the secondary filter box (40) and is used to transmit the upper layer of grease in the second space.

7. The sewage filtering device according to claim 1, characterized in that: The lower end of the secondary filter box (40) is also provided with a filtering structure, including an oil outlet pipe and a water outlet pipe, for oil and water separation.

8. The sewage filtering device according to claim 7, characterized in that: The oil outlet pipeline comprises an oil outlet pipe (70) connected to the lower end of the secondary filter box (40), and an oil-water separation diaphragm (71) is also embedded at the inlet of the upper end of the oil outlet pipe (70).

9. The sewage filtering device according to claim 7, characterized in that: The water outlet pipeline comprises a water outlet pipe (60) connected to the lower end of the secondary filter box (40); the upper end of the water outlet pipe (60) is connected to a solenoid valve B (61); and a receiving pipe (62) is further provided between the inlet of the solenoid valve B (61) and the secondary filter box (40).

10. The sewage filtering device according to claim 1, characterized in that: The upper end of the filter frame (30) is also movably connected to a pull ring (31), and a connecting frame (15) is fixedly arranged along the side wall of the first space and corresponding to the pull ring (31) for placing the pull ring (31), and baffles (12) are fixedly arranged on both sides of the first space to abut against the lower end of the frame edge of the filter frame (30).

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