Denitrification deep bed filter media interception and recovery structure

Abstract

The utility model relates to the technical field of sewage treatment, specifically a filter material interception and recovery structure of a denitrification deep bed filter, comprising a filter body, inlet and outlet weirs are respectively constructed on both sides of the inner wall of the filter body, and the inlet and outlet weirs extend from one end of the filter body to the other end along the length direction; a backwash wastewater channel is formed between each of the inlet and outlet weirs and the filter body, a filter material interception mesh plate is obliquely arranged in the backwash wastewater channel, a filter material recovery hole is arranged on the inlet and outlet weir corresponding to the lower end of the filter material interception mesh plate, and a weir top slope is obliquely arranged on the top of the inlet and outlet weir, and the weir top slope corresponds to one end of the backwash wastewater channel and is higher than that corresponding to one end of the filter. The interception and recovery system can intercept the filter material in the backwash wastewater and reuse the intercepted filter material to the filter, and does not affect the normal discharge of the backwash wastewater and the normal water inflow of each filter.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a filter material interception and recovery structure of a denitrification deep bed filter. Background Art

[0002] Due to the high requirements for TN index of effluent in existing sewage treatment plants, many sewage treatment plants adopt the denitrification deep bed filter process in deep treatment. The filter needs to backwash the filter media regularly during operation. During the backwashing process, the backwash wastewater often carries a certain amount of filter media into the backwash wastewater channel and backwash wastewater pool. The filter media carried in the backwash wastewater will cause wear and tear on the pipes and equipment in the backwashing system and accelerate the corrosion process. At the same time, due to the loss of filter media, a certain amount of filter media needs to be added to the filter tank regularly. Summary of the invention

[0003] In view of the above problems, the utility model provides a filter material interception and recovery structure for a denitrification deep bed filter, which can intercept filter material in backwash wastewater and return the intercepted filter material to the filter without affecting the normal discharge of backwash wastewater and the normal water inlet of each filter.

[0004] According to the technical solution of the utility model: a filter material interception and recovery structure of a denitrification deep bed filter, characterized in that: it includes a filter body, and both sides of the inner wall of the filter body are respectively constructed with inlet and outlet weirs, and the inlet and outlet weirs extend from one end of the filter body to the other end along the length direction;

[0005] A backwash wastewater channel is formed between each of the inlet and outlet water weirs and the filter tank body, and a filter material intercepting mesh plate is obliquely arranged in the backwash wastewater channel. A filter material recovery hole is arranged on the inlet and outlet water weir corresponding to the lower end of the filter material intercepting mesh plate. The top structure of the inlet and outlet water weir has an obliquely arranged weir top slope, and the weir top slope corresponding to one end of the backwash wastewater channel is higher than that corresponding to the other end of the filter tank.

[0006] As a further improvement of the utility model, one end of the filter material intercepting mesh plate is fixed to the pool wall of the filter pool body through a filter material mesh plate support frame, and the other end is fixed to the inlet and outlet water weirs through a filter material mesh plate fixing bolt.

[0007] As a further improvement of the present invention, the aperture of the filter material intercepting mesh plate is smaller than the particle size of the filter material.

[0008] As a further improvement of the utility model, the lower part of the filter material interception screen is bent vertically and fits on the inner surface of the inlet and outlet weirs, and is fixed by the filter material screen fixing bolts;

[0009] The upper end of the filter material mesh plate support frame is bent vertically upward and then fits against the inner wall of the filter tank body and is fixed by the filter material mesh plate fixing bolts.

[0010] As a further improvement of the present utility model, the weir top and the weir body of the water inlet and outlet weir are supported and connected by water inlet and outlet weir support columns, and a filter material recovery hole is formed between two adjacent water inlet and outlet weir support columns.

[0011] As a further improvement of the utility model, the upper end of the filter material mesh plate support frame is higher than the upper end of the inlet and outlet water weirs.

[0012] As a further improvement of the utility model, the bottom of the inlet and outlet weir is constructed as an inclined surface, and the inclined surface extends from the inner wall of the filter tank body toward the upper side of the filter tank.

[0013] As a further improvement of the utility model, there are multiple filter material mesh plate support frames, and the multiple filter material mesh plate support frames are fixed to the side of the filter material interception mesh plate in sequence.

[0014] The technical effect of the utility model is that the utility model has a simple and compact structure and strong operability, can efficiently intercept the filter material carried in the backwash wastewater, and reuse the intercepted filter material, thereby reducing the wear on the backwash wastewater collection system and the amount of filter material used. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a plan view of the utility model.

[0016] Figure 2 It is a side sectional view of the utility model.

[0017] Figure 3 It is a front sectional view of the utility model.

[0018] Figure 4 It is a plan view of the filter material intercepting mesh plate of the utility model.

[0019] Figure 5 It is a cross-sectional view of the filter material intercepting mesh plate of the utility model. DETAILED DESCRIPTION

[0020] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings.

[0021] Figure 1-5 It includes weir top slope 1, filter material recovery hole 2, filter material mesh fixing bolt 3, filter material mesh support frame 4, filter material intercepting mesh plate 5, inlet and outlet weir support column 6, backwash wastewater channel 7 and the like.

[0022] like Figure 1-5 As shown, the utility model is a denitrification deep bed filter material interception and recovery structure, including a filter body, wherein both sides of the inner wall of the filter body are respectively constructed with inlet and outlet weirs, and the inlet and outlet weirs extend from one end of the filter body to the other end along the length direction.

[0023] A backwash wastewater channel 7 is formed between each of the inlet and outlet weirs and the filter tank body, and a filter material interception mesh plate 5 is arranged obliquely in the backwash wastewater channel 7. A filter material recovery hole 2 is arranged on the inlet and outlet weir corresponding to the lower end of the filter material interception mesh plate 5 to recover the filter material to the filter tank. The top of the inlet and outlet weir is structured with an obliquely arranged weir top slope 1, and the weir top slope 1 corresponding to the end of the backwash wastewater channel 7 is higher than the end corresponding to the filter tank. The weir top slope 1 can extend the separation time of the filter material in the wastewater, thereby reducing the loss of the filter material.

[0024] One end of the filter material intercepting mesh plate 5 is fixed to the pool wall of the filter pool body through the filter material mesh plate supporting frame 4, and the other end is fixed to the inlet and outlet water weir through the filter material mesh plate fixing bolt 3.

[0025] The pore size of the filter material interception mesh plate 5 is smaller than the particle size of the filter material, so that the filter material interception mesh plate 5 can intercept the filter material while also passing a portion of the backwash wastewater. It is understandable that the filter material interception mesh plate 5 includes a filter material interception net, and the pore size of the filter material interception net is the pore size of the filter material interception mesh plate 5.

[0026] Furthermore, in order to ensure reliable positioning and fixation of the filter material intercepting mesh plate 5 , the lower portion of the filter material intercepting mesh plate 5 is vertically bent and fitted to the inner surface of the inlet and outlet water weir, and is fixed by the filter material mesh plate fixing bolts 3 .

[0027] like Figure 5 As shown, the upper end of the filter material mesh support frame 4 is bent vertically upward and then fits against the inner wall of the filter tank body and is fixed by the filter material mesh fixing bolts.

[0028] The weir top and the weir body of the inlet and outlet water weir are supported and connected by the inlet and outlet water weir support columns 6 , and a filter material recovery hole 2 is formed between two adjacent inlet and outlet water weir support columns 6 .

[0029] Furthermore, the upper end of the filter material mesh plate support frame 4 is higher than the upper end of the inlet and outlet water weirs.

[0030] like Figure 2 As shown, the bottom of the water inlet and outlet weir is constructed as an inclined surface, and the inclined surface extends from the inner wall of the filter tank body toward the oblique upper part of the filter tank. By constructing the bottom of the water inlet and outlet weir as an inclined surface, the material consumption can be reduced and the capacity of the filter tank body can be increased.

[0031] like Figure 4 As shown, there are multiple filter material mesh plate support frames 4, and the multiple filter material mesh plate support frames 4 are fixed to the side of the filter material intercepting mesh plate 5 in sequence.

[0032] The present application ensures that filter material entrained in wastewater during filter backwashing can be effectively intercepted and recycled to the filter, while not affecting the normal discharge of filter backwashing wastewater and filter water inlet.

[0033] The above description is only an embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution, improvement, etc. made within the concept and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A filter material interception and recovery structure for a denitrification deep bed filter, characterized in that: The filter tank body comprises a filter tank body, wherein both sides of the inner wall of the filter tank body are respectively provided with water inlet and outlet weirs, and the water inlet and outlet weirs extend from one end to the other end of the filter tank body along the length direction; A backwash wastewater channel (7) is formed between each of the inlet and outlet weirs and the filter tank body. A filter material interception mesh plate (5) is arranged obliquely in the backwash wastewater channel (7). A filter material recovery hole (2) is arranged on the inlet and outlet weir at a position corresponding to the lower end of the filter material interception mesh plate (5). The top of the inlet and outlet weir is structured with an obliquely arranged weir top slope (1). The weir top slope (1) is higher at one end corresponding to the backwash wastewater channel (7) than at one end corresponding to the filter tank.

2. The filter material interception and recovery structure for a denitrification deep bed filter as claimed in claim 1, characterized in that: One end of the filter material intercepting mesh plate (5) is fixed to the pool wall of the filter pool body via a filter material mesh plate support frame (4), and the other end is fixed to the inlet and outlet water weir via a filter material mesh plate fixing bolt (3).

3. The filter material interception and recovery structure for a denitrification deep bed filter as claimed in claim 1, characterized in that: The pore size of the filter material intercepting mesh plate (5) is smaller than the particle size of the filter material.

4. The filter material interception and recovery structure for a denitrification deep bed filter as claimed in claim 2, characterized in that: The lower part of the filter material intercepting mesh plate (5) is bent vertically and fits onto the inner surface of the inlet and outlet weirs, and is fixed by the filter material mesh plate fixing bolts (3); The upper end of the filter material mesh plate support frame (4) is bent vertically upward and then fits against the inner wall of the filter tank body and is fixed by the filter material mesh plate fixing bolts.

5. The filter material interception and recovery structure for a denitrification deep bed filter as claimed in claim 1, characterized in that: The weir top and the weir body of the water inlet and outlet weir are supported and connected by water inlet and outlet weir support columns (6), and a filter material recovery hole (2) is formed between two adjacent water inlet and outlet weir support columns (6).

6. The filter material interception and recovery structure for a denitrification deep bed filter as claimed in claim 2, characterized in that: The upper end of the filter material mesh plate support frame (4) is higher than the upper end of the inlet and outlet water weirs.

7. The filter material interception and recovery structure for a denitrification deep bed filter as claimed in claim 1, characterized in that: The bottom of the water inlet and outlet weir is constructed as an inclined surface, and the inclined surface extends from the inner wall of the filter tank body toward the oblique upper side in the filter tank.

8. The filter material interception and recovery structure for a denitrification deep bed filter as claimed in claim 2, characterized in that: There are a plurality of filter material mesh plate support frames (4), and the plurality of filter material mesh plate support frames (4) are fixed in sequence to the side of the filter material intercepting mesh plate (5).

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