Deep filter for sewage treatment

Abstract

The utility model relates to the technical field of sewage treatment, and provides a deep filter for sewage treatment, which comprises a shell and further comprises a first separation frame, the first separation frame is arranged in the shell along the longitudinal direction, a flocculation mixing area is formed in the first separation frame, a BAF area is formed between the first separation frame and the shell, a filler bracket is arranged at the bottom of the BAF area, and the first separation frame is arranged in the shell along the longitudinal direction. A dosing area is formed between the filler bracket and the shell; the second separation frame is arranged in the shell in the longitudinal direction and located above the first separation frame, a fiber ball filtering area is formed in the second separation frame and communicated with the flocculation mixing area, a lower grid and an upper grid are installed at the bottom and the top of the fiber ball filtering area respectively, and a water outlet area is formed between the upper grid and the shell; the water inlet pipe, the water outlet pipe and the chemical feeding pipe are all installed on the shell, the water inlet pipe is communicated with the BAF area, the water outlet pipe is communicated with the water outlet area, and the chemical feeding pipe is communicated with the chemical feeding area.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a deep filter for sewage treatment. Background Art

[0002] Sewage is generated during the refining and processing of crude oil, and is characterized by high oil content and poor biodegradability, thus being difficult to treat.

[0003] There are great limitations in using the traditional activated sludge method for treatment, such as large fluctuations in water quality, high salt content, lack of N and P nutrients, the presence of harmful substances leading to sludge bulking, high content of SS (suspended solids in water quality) in the effluent, and unsatisfactory degradation effect. In recent years, the discharge of sewage has been increasing, and there is an urgent need for an effective treatment device. Summary of the Utility Model

[0004] Aiming at the defects in the prior art, the purpose of the utility model is to provide a deep filter for sewage treatment, which can specifically and effectively treat sewage.

[0005] To achieve the above purpose, the utility model is realized through the following technical solutions: A deep filter for sewage treatment includes a housing, and further includes:

[0006] A first partition frame, which is longitudinally arranged in the housing. A flocculation mixing area is formed inside the first partition frame. A BAF area is formed between the first partition frame and the housing. A filler support is arranged at the bottom of the BAF area, and the filler support is fixedly connected to both the first partition frame and the housing. A chemical dosing area is formed between the filler support and the housing;

[0007] A second partition frame, which is longitudinally arranged in the housing and above the first partition frame. A fiber ball filtration area is formed inside the second partition frame. The fiber ball filtration area is communicated with the flocculation mixing area. A lower grid and an upper grid are respectively installed at the bottom and top of the fiber ball filtration area. An effluent area is formed between the upper grid and the housing;

[0008] An inlet pipe, an outlet pipe and a chemical dosing pipe, all of which are installed on the housing. The inlet pipe is communicated with the BAF area, the outlet pipe is communicated with the effluent area, and the chemical dosing pipe is communicated with the chemical dosing area.

[0009] Furthermore, a plurality of flow disturbing plates are installed on the inner wall of the first partition frame, and the plurality of flow disturbing plates are arranged alternately longitudinally.

[0010] Further, it also includes a backwashing aeration pipe and a backwashing water inlet pipe, both of which are communicated with the chemical dosing area.

[0011] Further, a filter head plate and filter heads are also arranged in the chemical dosing area. The filter head plate is arranged above the backwashing aeration pipe and the backwashing water inlet pipe and is fixedly connected to the housing, and the filter heads are installed on the filter head plate.

[0012] Further, a movable baffle is arranged at the bottom of the first partition frame, and the end of the movable baffle is rotatably connected to the packing support.

[0013] Further, it also includes a sewage discharge pipe, which is installed at the bottom of the housing and is communicated with the chemical dosing area.

[0014] Further, the second partition frame is an inverted frustum structure.

[0015] Further, a maintenance hole is opened on the housing, the maintenance hole is communicated with the water outlet area, and a maintenance cover is installed at the maintenance hole.

[0016] Further, the housing and the first partition frame form a concentric circle structure on the same cross-section.

[0017] Advantages of the present utility model: The deep filter for sewage treatment provided by the present utility model can remove most of the organic pollutants and oil when sewage passes through the BAF area + flocculation mixing area + fiber ball filtration area successively. Volatile phenol and sulfide can basically not be detected, which reduces the burden for subsequent further treatment and can effectively treat the sewage specifically. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the present utility model;

[0019] Figure 2 is Figure 1 the sectional structural diagram along the B-B direction in

[0020] Figure 3 is Figure 1 the sectional structural diagram along the A-A direction in

[0021] Reference numerals: 10 - housing, 11 - leg, 12 - inspection cover, 20 - first partition frame, 21 - flocculation mixing zone, 22 - BAF zone, 23 - packing support, 24 - chemical dosing zone, 25 - spoiler, 26 - filter head plate, 27 - filter head, 28 - movable baffle, 30 - second partition frame, 31 - fiber ball filtration zone, 32 - lower grid, 33 - upper grid, 34 - water outlet zone, 40 - water inlet pipe, 50 - water outlet pipe, 60 - chemical dosing pipe, 70 - backwash aeration pipe, 80 - backwash inlet pipe, 90 - sewage drain pipe. Detailed implementation manners

[0022] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific implementation manners.

[0023] In this application, unless otherwise clearly specified and limited, the terms "connection" and "fixation" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "horizontal", "top", "bottom", "upper", "lower", "inner" and "outer" etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0025] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise clearly and specifically limited.

[0026] As Figures 1-3 shown, the present utility model provides a deep filter for sewage treatment, which includes a housing 10, and legs 11 are installed at the bottom of the housing 10. The above contents are all prior arts, and the specific structures will not be described in detail here. The present utility model further includes a first partition frame 20, a second partition frame 30, a water inlet pipe 40, a water outlet pipe 50 and a chemical dosing pipe 60.

[0027] The first partition frame 20 is arranged longitudinally inside the housing 10. A flocculation mixing zone 21 is formed inside the first partition frame 20. A BAF zone 22 is formed between the first partition frame 20 and the housing 10. BAF biological fillers are placed in the BAF zone 22. A filler support 23 is provided at the bottom of the BAF zone 22. The filler support 23 is fixedly connected to both the first partition frame 20 and the housing 10. A chemical addition zone 24 is formed between the filler support 23 and the housing 10.

[0028] The second partition frame 30 is arranged longitudinally inside the housing 10 and is located above the first partition frame 20. A fiber ball filtration zone 31 is formed inside the second partition frame 30. The fiber ball filtration zone 31 is communicated with the flocculation mixing zone 21. Fiber ball filter media are placed in the fiber ball filtration zone 31. A lower grid 32 and an upper grid 33 are respectively installed at the bottom and the top of the fiber ball filtration zone 31. An effluent zone 34 is formed between the upper grid 33 and the housing 10.

[0029] The water inlet pipe 40, the water outlet pipe 50 and the chemical addition pipe 60 are all installed on the housing 10. The water inlet pipe 40 is communicated with the BAF zone 22. A first valve is provided on the water inlet pipe 40. The water outlet pipe 50 is communicated with the effluent zone 34. A second valve is provided on the water outlet pipe 50. The chemical addition pipe 60 is communicated with the chemical addition zone 24. A third valve is provided on the chemical addition pipe 60.

[0030] The specific working process of the present utility model is as follows:

[0031] First, the first valve and the second valve are opened. Sewage enters the BAF zone 22 through the water inlet pipe 40, and part of the organic pollutants, most of the oil content, part of the sulfide and part of the volatile phenol are removed by the biological fillers in the BAF zone 22.

[0032] Next, the sewage enters the chemical addition zone 24. At this time, the third valve is opened, and a flocculant is added into the chemical addition zone 24 through the chemical addition pipe 60. The sewage and the flocculant enter the flocculation mixing zone 21 from bottom to top to complete mixing.

[0033] Finally, the sewage enters the fiber ball filtration zone 31, and the remaining organic pollutants are removed by the fiber ball filter media and are finally discharged through the water outlet pipe 50.

[0034] In this application, when the sewage passes through the BAF zone 22 + the flocculation mixing zone 21 + the fiber ball filtration zone 31 in sequence, most of the organic pollutants and oil can be removed, and the volatile phenol and sulfide can hardly be detected basically, which reduces the burden for subsequent further treatment and can effectively treat the sewage specifically.

[0035] In one embodiment, a plurality of flow disturbance plates 25 are installed on the inner wall of the first partition frame 20, and the plurality of flow disturbance plates 25 are arranged alternately left and right longitudinally.

[0036] When sewage enters the flocculation mixing zone 21 from bottom to top, the turbulator plates 25 arranged in a staggered manner will disturb the sewage, thus making the mixing effect of sewage and flocculant better.

[0037] In one embodiment, it further includes a backwash aeration pipe 70 and a backwash water inlet pipe 80, both of which are communicated with the chemical dosing zone 24. A fourth valve is installed on the backwash aeration pipe 70, and a fifth valve is installed on the backwash water inlet pipe 80.

[0038] During the working process of the present utility model, both the fourth valve and the fifth valve are in a closed state.

[0039] When the present utility model is not working, the staff can open the fourth valve and the fifth valve. The backwash water enters the chemical dosing zone 24 through the backwash water inlet pipe 80, and the backwash air enters the chemical dosing zone 24 through the backwash aeration pipe 70, thereby backwashing the biological fillers in the BAF zone 22 to clean the biological fillers in the BAF zone 22 and improve their activity.

[0040] In one embodiment, a filter head plate 26 and filter heads 27 are further arranged in the chemical dosing zone 24. The filter head plate 26 is arranged above the backwash aeration pipe 70 and the backwash water inlet pipe 80 and is fixedly connected to the housing 10, and the filter heads 27 are installed on the filter head plate 26.

[0041] After the backwash water sprayed by the backwash water inlet pipe 80 and the backwash air sprayed by the backwash aeration pipe 70 are distributed with water and air through the filter heads 27, the biological fillers in the BAF zone 22 are backwashed.

[0042] Practice has proved that the air-water backwashing method has a better effect than the simple water backwashing method. The air-water backwashing can destroy the mud ball structure in the biological fillers in the BAF zone 22. When air flushing, a great vibration is generated on the biological fillers in the BAF zone 22. The biological fillers collide and rub against each other repeatedly and are stirred violently, so that the mud balls cannot be formed, and the formed mud ball structure is also damaged by vibration, and the adhesions on all the biological fillers fall off and are carried away by the backwash water.

[0043] In one embodiment, a movable baffle 28 is arranged at the bottom of the first partition frame 20, and the end of the movable baffle 28 is rotatably connected to the filler support 23 through a rotating shaft.

[0044] When backwashing the biological fillers in the BAF zone 22, the staff closes the movable baffle 28 by controlling the rotating shaft. At this time, the flocculation mixing zone 21 is in a closed state.

[0045] In one embodiment, it further includes a sewage discharge pipe 90. The sewage discharge pipe 90 is installed at the bottom of the housing 10 and is communicated with the chemical dosing zone 24. A sixth valve is installed on the sewage discharge pipe 90.

[0046] During the operation of the present utility model, large suspended solids generated in the fiber ball filtration area 31 slide down along the inner wall of the second partition frame 30 to the bottom of the housing 10. The sixth valve on the sewage discharge pipe 90 is regularly opened to discharge debris through the sewage discharge pipe 90.

[0047] In one embodiment, the second partition frame 30 is an inverted frustum structure, so that large suspended solids generated in the fiber ball filtration area 31 can fall smoothly.

[0048] In one embodiment, a maintenance hole is provided on the housing 10. The maintenance hole communicates with the water outlet area 34, and a maintenance cover 12 is installed at the maintenance hole.

[0049] The staff can perform maintenance on the present utility model through the maintenance hole and replace the fiber ball filter material in the fiber ball filtration area 31.

[0050] The above shows and describes the basic principles, main features and advantages of the present utility model. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present utility model.

[0051] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A depth filter for sewage treatment, comprising a housing, characterized in that: Also includes: A first partition frame, the first partition frame is longitudinally arranged in the shell, a flocculation mixing zone is formed inside the first partition frame, a BAF zone is formed between the first partition frame and the shell, a filler bracket is arranged at the bottom of the BAF zone, the filler bracket is fixedly connected to the first partition frame and the shell, and a drug adding zone is formed between the filler bracket and the shell; a second partition frame, the second partition frame is longitudinally arranged in the shell and located above the first partition frame, a fiber ball filter area is formed inside the second partition frame, the fiber ball filter area is connected with the flocculation mixing area, a lower grid and an upper grid are respectively installed at the bottom and the top of the fiber ball filter area, and a water outlet area is formed between the upper grid and the shell; A water inlet pipe, a water outlet pipe and a dosing pipe, wherein the water inlet pipe, the water outlet pipe and the dosing pipe are all installed on the shell, the water inlet pipe is connected to the BAF area, the water outlet pipe is connected to the water outlet area, and the dosing pipe is connected to the dosing area.

2. A depth filter for sewage treatment according to claim 1, characterized in that: A plurality of spoilers are installed on the inner wall of the first partition frame, and the plurality of spoilers are alternately arranged in the longitudinal direction.

3. A depth filter for sewage treatment according to claim 1, characterized in that: It also includes a backwash aeration pipe and a backwash water inlet pipe, and both the backwash aeration pipe and the backwash water inlet pipe are connected to the dosing area.

4. A depth filter for sewage treatment according to claim 3, characterized in that: A filter head plate and a filter head are also provided in the dosing area. The filter head plate is provided above the backwash aeration pipe and the backwash water inlet pipe and is fixedly connected to the shell. The filter head is installed on the filter head plate.

5. A depth filter for sewage treatment according to claim 1, characterized in that: A movable baffle is provided at the bottom of the first partition frame, and an end of the movable baffle is rotatably connected to the filler bracket.

6. A depth filter for sewage treatment according to claim 1, characterized in that: It also includes a sewage discharge pipe, which is installed at the bottom of the shell and is connected to the drug adding area.

7. A depth filter for sewage treatment according to claim 6, characterized in that: The second partition frame is an inverted frustum structure.

8. A depth filter for sewage treatment according to claim 1, characterized in that: An inspection hole is provided on the shell, the inspection hole is communicated with the water outlet area, and an inspection cover is installed at the inspection hole.

9. A depth filter for sewage treatment according to claim 1, characterized in that: The shell and the first partition frame form a concentric circle structure on the same cross section.

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