Phosphorus removal device

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a dephosphorization device. The dephosphorization device comprises an outer cylinder body, an inner cylinder body, a perforated plate assembly, an inclined plate assembly and the like, the outer barrel comprises an outer barrel body, and the inner barrel comprises an inner barrel body; a water outlet channel communicated with the water outlet pipe is arranged between the outer cylinder body and the inner cylinder body; the water outlet channel and the water outlet pipe are positioned at the upper part of the outer cylinder body; a water flow descending channel is formed in the inner barrel body; the perforated plate assembly is arranged in the water flow descending channel; a water flow ascending channel is defined by the outer cylinder body, the water outlet channel and the inner cylinder body, and the inclined plate assembly is arranged in the water flow ascending channel. According to the utility model, flocculation and precipitation are integrated, the structure is compact, the occupied area is saved, the kinetic energy and potential energy of wastewater are fully utilized to realize high-efficiency hydraulic flocculation, and the operation cost is lower; the dephosphorization effect is greatly improved through the ingenious design that the perforated plate assembly is integrated in the water flow descending channel and the inclined plate assembly is integrated in the water flow ascending channel.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field, concretely relates to a phosphorus removal device. BACKGROUND

[0002] At present, a large number of phosphorus-containing sewage is discharged into natural water bodies, leading to the eutrophication of rivers and lakes, and causing serious damage to the ecological environment. In addition, phosphorus precipitated in the bottom mud of water bodies during the natural circulation process is difficult to return to land, and phosphate rock, as a non-renewable resource, is increasingly exhausted with mining and use. Therefore, it is very important to deeply remove and recycle phosphorus in sewage.

[0003] The current commonly used phosphorus removal technologies mainly include biological method, crystallization method, adsorption method and flocculation sedimentation method, among which the flocculation sedimentation method is the most widely used method.

[0004] The patent application with publication number CN115504556A in the prior art discloses a flocculation and sedimentation integrated sewage microflocculation deep phosphorus removal device, which uses a mechanical stirring paddle to mix reagents to promote reaction, has high energy consumption, and the internal structure of the device is complex.

[0005] In summary, there is an urgent need for a phosphorus removal device with simple structure, low operating cost and good phosphorus removal effect to solve the problems existing in the prior art. UTILITY MODEL CONTENT

[0006] The utility model aims at providing a phosphorus removal device with simple structure, low operating cost and good phosphorus removal effect, and the specific technical solutions are as follows:

[0007] A phosphorus removal device, comprising an outer cylinder, an inner cylinder, a water inlet pipe, a water outlet pipe, a sludge discharge pipe, a perforated plate assembly and an inclined plate assembly; the outer cylinder comprises an outer cylinder body with an opening at the upper end and a movable cover, the movable cover is detachably arranged at the opening; the inner cylinder comprises an inner cylinder body with an opening at the lower end, the inner cylinder body is arranged in the containing cavity of the outer cylinder body, and a water outlet channel communicating with the water outlet pipe is arranged between the inner wall of the outer cylinder body and the outer wall of the inner cylinder body, the water outlet channel and the water outlet pipe are both located at the upper part of the outer cylinder body; a water flow descending channel is formed in the inner cylinder body, the water inlet pipe communicates with the water flow descending channel, and the water outlet end surface of the water inlet pipe is higher than the upper end surface of the water outlet channel; the perforated plate assembly is arranged in the water flow descending channel;

[0008] The inner wall of the outer cylinder body, the water outlet channel and the outer wall of the inner cylinder body enclose a water flow ascending channel, and the inclined plate assembly is arranged in the water flow ascending channel;

[0009] The sludge gathering area is formed at a position below the inner cylinder body in the outer cylinder body accommodating cavity, and the sludge discharge pipe is communicated with the sludge gathering area.

[0010] The phosphorus removal device comprises an outer cylinder body, an inner cylinder body, a water inlet pipe, a water outlet pipe, a sludge discharge pipe, a perforated plate assembly and an inclined plate assembly; the outer cylinder body comprises an outer cylinder body with an opening at an upper end and a movable cover body, and the inner cylinder body comprises an inner cylinder body with an opening at a lower end; a water outlet channel communicated with the water outlet pipe is arranged between the inner wall of the outer cylinder body and the outer wall of the inner cylinder body, and the water outlet channel and the water outlet pipe are located at the upper part of the outer cylinder body; a water flow descending channel is formed in the inner cylinder body; the perforated plate assembly is arranged in the water flow descending channel; the inner wall of the outer cylinder body, the water outlet channel and the outer wall of the inner cylinder body enclose a water flow ascending channel, and the inclined plate assembly is arranged in the water flow ascending channel. The flocculation and sedimentation are integrally arranged, the overall structure is compact, the land occupation is saved, the kinetic energy and potential energy of the wastewater are fully utilized to realize efficient hydraulic flocculation, the energy consumption is lower than that of conventional mechanical mixing flocculation, and the operation cost is lower; the perforated plate assembly is integrated in the water flow descending channel, can make the wastewater form micro eddy flow through the perforated plate assembly, enhance the contact reaction between the flocculant and the phosphorus in the wastewater, strengthen the production of phosphorus-containing sludge flocs insoluble in water, and combine the inclined plate assembly integrated in the water flow ascending channel to strengthen the settlement of the phosphorus-rich sludge in the wastewater under the dual action of gravity and the interception of the inclined plate assembly to the sludge gathering area, thereby greatly improving the phosphorus removal effect.

[0011] Preferably, along the water flow direction in the water flow descending channel, the perforated plate assembly comprises a first perforated single piece, a second perforated single piece and a third perforated single piece arranged in sequence, the first perforated single piece comprises one or more than two first perforated plates arranged at intervals, the second perforated single piece comprises one or more than two second perforated plates arranged at intervals, and the third perforated single piece comprises one or more than two third perforated plates arranged at intervals.

[0012] The ratio of the total area of the through holes in the first perforated plate to the plate area is P1, the ratio of the total area of the through holes in the second perforated plate to the plate area is P2, the ratio of the total area of the through holes in the third perforated plate to the plate area is P3, and P1 < P2 < P3.

[0013] The perforated plate assembly with gradually increasing total area of through holes is adopted, so that micro eddy flow is formed when the wastewater flows through the through holes of the perforated plate assembly, and the capture efficiency of the flocculant to the phosphorus is improved.

[0014] Preferably, the P1 is 2.5% to 3%; the P2 is 3.5% to 4.5%; and the P3 is 5.0% to 6.0%.

[0015] Preferably, the first perforated plate, the second perforated plate and the third perforated plate are detachably arranged on the inner wall of the inner cylinder body by the support.

[0016] The first perforated plate, the second perforated plate and the third perforated plate are detachably designed in the utility model, which is convenient for installation and replacement and has high practicability.

[0017] Preferably, the first perforated plate, the second perforated plate and the third perforated plate are detachably arranged on the inner wall of the inner cylinder body by the support.

[0018] Preferably, the inclined plate assembly is arranged on the inner wall of the outer cylinder body and the outer wall of the inner cylinder body by an inclined plate support frame; the inclined plate assembly comprises a plurality of settlement inclined plates arranged in a spaced and staggered manner, and the gaps between the plurality of settlement inclined plates form a flow channel.

[0019] The settlement inclined plate is detachably designed in the utility model, which is convenient for installation and replacement.

[0020] Preferably, along the water flow direction, the water inlet pipe comprises a horizontal pipe section, an arc-shaped transition pipe section and a vertical pipe section arranged in sequence, and the water outlet end surface of the vertical pipe section is 5-20 cm higher than the upper end surface of the water outlet channel.

[0021] Preferably, the water outlet channel is a ring-shaped water collecting groove.

[0022] Preferably, the lower part of the containing cavity of the outer cylinder body is a circular truncated cone structure with a wide upper part and a narrow lower part, and the sludge discharge pipe is in communication with the lower side of the circular truncated cone structure.

[0023] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. The utility model will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings constituting a part of the present application are used to provide further understanding of the utility model, and the schematic embodiments of the utility model and the description thereof are used to explain the utility model and do not constitute improper limitation on the utility model. In the drawings:

[0025] Figure 1 is a structure schematic view of the phosphorus removal device in the utility model (the black arrow represents the flow direction of wastewater);

[0026] Figure 2 is Figure 1 a structure schematic view of the first perforated plate in the utility model;

[0027] Figure 3 is Figure 1Structure schematic view of the second perforated plate;

[0028] Figure 4 is Figure 1 Structure schematic view of the third perforated plate;

[0029] Wherein, 1, outer cylinder, 1.1, outer cylinder body, 1.2, movable cover body;2, inner cylinder, 2.1, inner cylinder body;3, water inlet pipe;4, water outlet pipe;5, sludge discharge pipe;6, perforated plate assembly, 6.1, first perforated plate, 6.2, second perforated plate, 6.3, third perforated plate;7, inclined plate assembly;8, water outlet channel;9, support;10, inclined plate support frame;11, inner cylinder support frame;A, water flow descending channel, B, water flow ascending channel, C, sludge accumulation area, D, through hole. DETAILED DESCRIPTION

[0030] The embodiments of the utility model are described in detail below in combination with the drawings, but the utility model can be implemented in multiple different ways limited and covered by the claims.

[0031] Embodiment:

[0032] Referring to Figure 1 A phosphorus removal device, comprising an outer cylinder 1, an inner cylinder 2, a water inlet pipe 3, a water outlet pipe 4, a sludge discharge pipe 5, a perforated plate assembly 6 and an inclined plate assembly 7, details as follows:

[0033] The outer cylinder 1 includes an outer cylinder body 1.1 with an opening at the upper end and a movable cover body 1.2, and the movable cover body 1.2 is detachably arranged at the opening (preferably, the opening is arranged at the top of the outer cylinder body). In this embodiment, the outer cylinder body 1.1 is composed of a hollow cylindrical vertical cylinder and a hollow circular truncated cone cylinder with a wide upper end and a narrow lower end, and the hollow circular truncated cone cylinder is located at the lower end, i.e. the bottom of the outer cylinder is a circular truncated structure.

[0034] The inner cylinder 2 includes an inner cylinder body 2.1 with an opening at the lower end, and the inner cylinder body is arranged in the containing cavity of the outer cylinder body 1.1. In this embodiment, the inner cylinder body 2.1 also adopts a hollow cylindrical vertical cylinder. In this embodiment, it is preferred that the height of the inner cylinder body 2.1 is 60% to 80% of the height of the outer cylinder body 1.1, and the inner cylinder body is supported by the inner cylinder support frame 11 located at the bottom of the outer cylinder body, and the upper end surface of the inner cylinder body can abut or be gap-set with the lower surface of the movable cover body on the cover.

[0035] A water outlet channel 8 in communication with the water outlet pipe 4 is arranged between the inner wall of the outer cylinder body 1.1 and the outer wall of the inner cylinder body 2.1, and in this embodiment, the water outlet channel is a ring-shaped water collecting groove. The water outlet channel 8 and the water outlet pipe 4 are both located at the upper part of the outer cylinder body 1.1.

[0036] The inner cylinder body 2.1 forms a water flow descending channel A and a flocculation reaction area.

[0037] The water inlet pipe 3 is communicated with the water flow descending channel A and the water outlet end surface of the water inlet pipe 3 is higher than the upper end surface of the water outlet channel 8. In the embodiment, along the water flow direction, the water inlet pipe 3 comprises a horizontal pipe segment, an arc transition pipe segment and a vertical pipe segment arranged in sequence, and the water outlet end surface of the vertical pipe segment is 5-20 cm higher than the upper end surface of the water outlet channel 8. That is, the water inlet pipe extends to the axis of the inner cylinder body 2.1 and is bent upward by 90 degrees to form the arc transition pipe segment after penetrating the outer cylinder body 1.1 and the inner cylinder body 2.1 in the horizontal direction, and finally extends in the vertical direction to form the vertical pipe segment, and the water outlet end surface (i.e. the water outlet position) of the vertical pipe segment is higher than the top of the water collecting tank.

[0038] The perforated plate assembly 6 is arranged in the water flow descending channel A. In the embodiment, along the water flow direction in the water flow descending channel A, the perforated plate assembly 6 comprises a first perforated single piece, a second perforated single piece and a third perforated single piece arranged in sequence, the first perforated single piece comprises one or more than two first perforated plates 6.1 arranged at intervals, the second perforated single piece comprises one or more than two second perforated plates 6.2 arranged at intervals, and the third perforated single piece comprises one or more than two third perforated plates 6.3 arranged at intervals. Figure 1 It is shown in the figure that the first perforated plate 6.1, the second perforated plate 6.2 and the third perforated plate 6.3 are detachably arranged on the inner wall of the inner cylinder body 2.1 by the support 9. Preferably, the support can adopt a horizontal straight plate and a vertical straight plate arranged at an angle of 90°, the vertical straight plate is used for being fixed to the inner wall of the inner cylinder body 2.1, and the horizontal straight plate is used for being connected or clamped with the perforated plate in the perforated plate assembly. The first perforated single piece comprises two first perforated plates arranged at intervals, the second perforated single piece comprises two second perforated plates arranged at intervals, and the third perforated single piece comprises two third perforated plates arranged at intervals.

[0039] It is further preferred in the embodiment that the first perforated plate, the second perforated plate and the third perforated plate are all circular plates, and the diameter of the circular plate is slightly smaller than the inner diameter of the inner cylinder body, for example, 20 mm smaller. Circular through holes are arranged on the first perforated plate, the second perforated plate and the third perforated plate, and the center axis of the circular through hole is the same as the water flow direction in the water flow descending channel A. The ratio of the total area of the through holes to the plate area of the first perforated plate is P1, the ratio of the total area of the through holes to the plate area of the second perforated plate is P2, and the ratio of the total area of the through holes to the plate area of the third perforated plate is P3, and P1 Figure 2The first perforated plate is provided with four layers of holes arranged from the center to the periphery, that is, water-passing circular holes with a radius of 15-20mm are equally spaced on the center and three concentric circles (shown as through holes D in the figure); the value of P2 is 4%, see Figure 3 The second perforated plate is provided with a five-layer hole group arranged from the center to the periphery, that is, water-passing circular holes with a radius of 15-20mm are equally spaced on the center and four concentric circles (shown as through holes D in the figure); the value of P3 is 5.5%, see Figure 4 The third perforated plate is equipped with a six-layer perforation group arranged from the center to the periphery, that is, water-passing circular holes with a radius of 15-20mm are equally spaced on the center and five concentric circles (shown as through holes D in the figure). The perforated plate assembly with a unique structure can form micro eddies when the liquid flows through the perforated plate assembly, thereby improving the flocculant's capture efficiency of phosphorus in the liquid.

[0040] The inner wall of the outer cylinder body 1.1, the outlet channel 8, and the outer wall of the inner cylinder body 2.1 form a water flow rising channel B, and the inclined plate assembly 7 is disposed in the water flow rising channel B. Preferably, in this embodiment, the inclined plate assembly 7 is disposed on the inner wall of the outer cylinder body 1.1 and the outer wall of the inner cylinder body 2.1 via an inclined plate support frame 10; the inclined plate assembly 7 includes multiple settling inclined plates spaced apart and staggered, with the gaps between the multiple settling inclined plates forming a flow channel. The inclined plate assembly increases the settling area, shortens the settling time, and changes the water flow from a turbulent state to a laminar state, thereby improving the sludge settling efficiency.

[0041] In this embodiment, the water effluent from the upper part of the water flow rising channel B is regulated by the water outlet channel 8 and then discharged through the water outlet pipe 4. This can eliminate the short-flow phenomenon of the water effluent, which is conducive to the stability of the operating state, improves the mud-water separation effect, reduces other pollutants carried in the effluent, and thus improves the pollutant removal rate.

[0042] The sludge accumulation zone C is formed in the portion of the outer cylinder body 1.1 below the inner cylinder body 2.1. In this embodiment, the hollow frustum-shaped cylinder of the outer cylinder body 1.1 is the sludge accumulation zone, and the inverted frustum structure is conducive to the accumulation and compression sedimentation of phosphorus-rich sludge. The sludge discharge pipe 5 is connected to the sludge accumulation zone C. In this embodiment, the sludge discharge pipe 5 is connected to the lower side of the frustum structure.

[0043] The phosphorus removal device of this invention operates as follows: In continuous flow operation, phosphorus-containing wastewater mixed with flocculant (iron salt or aluminum salt and polyacrylamide) enters the receiving cavity of the outer cylinder body 1.1 in the outer cylinder 1 through the inlet pipe 3; the wastewater falls into the upper part (i.e., the reaction zone) of the water flow down channel A under gravity; after being fully mixed in the reaction zone, it continues to pass through the perforated plate assembly 6 under gravity to reach the bottom of the water flow down channel A. When the wastewater flows through the through holes of the perforated plate, it forms a micro-vortex, thereby enhancing the contact reaction between the flocculant and the phosphorus in the wastewater. The wastewater, which reaches the bottom of the downward flow channel A, slowly flows upward into the upward flow channel B. During the upward flow of the wastewater, it passes through the inclined plate assembly 7. The settling inclined plate can greatly improve the separation efficiency of phosphorus-rich sludge and wastewater. Under the action of gravity and the interception of the inclined plate assembly, the phosphorus-rich sludge in the wastewater settles into the sludge accumulation area C. The sludge is continuously concentrated by gravity and discharged from the sludge discharge pipe 5. The clarified wastewater overflows into the outlet channel 8 located at the top of the outer cylinder body 1.1, and then flows out through the outlet pipe 4 into the next wastewater treatment unit.

[0044] The effect of applying the technical solution of this embodiment is:

[0045] ① The phosphorus removal device fully utilizes the kinetic and potential energy of the wastewater to achieve efficient hydraulic flocculation, which is more energy-efficient and has lower operating costs than conventional mechanical mixing flocculation; flocculation and sedimentation are integrated into one unit, the device has a compact structure and saves space.

[0046] ② The water flow downflow channel A is equipped with a perforated plate assembly 6. Perforated plates with different porosities can form micro-vortices when wastewater flows through, so that the flocculant in the wastewater can fully contact the pollutant phosphorus. As the porosity of the perforated plate increases in the direction of water flow, more micro-vortices are generated to improve the flocculant's capture efficiency of phosphorus in the liquid. At the same time, the generated flocculent sludge particles are larger, which is conducive to the sedimentation and concentration of sludge in the sludge aggregation zone.

[0047] ③ An inclined plate assembly 7 is installed in the water flow upward channel B, which increases the sedimentation area of ​​sludge in wastewater and shortens the sedimentation time. At the same time, the water flow in the plate changes from turbulent flow to laminar flow, which improves the sedimentation efficiency of sludge.

[0048] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A phosphorus removal device, characterized in that, It includes an outer cylinder (1), an inner cylinder (2), an inlet pipe (3), an outlet pipe (4), a sludge discharge pipe (5), a perforated plate assembly (6), and an inclined plate assembly (7); The outer cylinder (1) includes an outer cylinder body (1.1) with an opening at the upper end and a movable cover (1.2), wherein the movable cover (1.2) is detachably disposed at the opening; The inner cylinder (2) includes an inner cylinder body (2.1) with an opening at the lower end. The inner cylinder body is disposed in the receiving cavity of the outer cylinder body (1.1), and a water outlet channel (8) communicating with the water outlet pipe (4) is provided between the inner wall of the outer cylinder body (1.1) and the outer wall of the inner cylinder body (2.1). The water outlet channel (8) and the water outlet pipe (4) are both located at the upper part of the outer cylinder body (1.1). A water flow down channel (A) is formed inside the inner cylinder body (2.1). The water inlet pipe (3) is connected to the water flow down channel (A), and the water outlet end face of the water inlet pipe (3) is higher than the upper end face of the water outlet channel (8). The perforated plate assembly (6) is disposed in the water flow down channel (A). The inner wall of the outer cylinder body (1.1), the water outlet channel (8), and the outer wall of the inner cylinder body (2.1) form a water flow rising channel (B), and the inclined plate assembly (7) is disposed in the water flow rising channel (B); The accommodating cavity in the outer cylinder body (1.1) is located below the inner cylinder body (2.1) to form a sludge accumulation area (C), and the sludge discharge pipe (5) is connected to the sludge accumulation area (C).

2. The phosphorus removal device according to claim 1, characterized in that, Along the water flow direction in the water flow downflow channel (A), the perforated plate assembly (6) includes a first perforated piece, a second perforated piece, and a third perforated piece arranged in sequence. The first perforated piece includes one or more first perforated plates (6.1) arranged at intervals. The second perforated piece includes one or more second perforated plates (6.2) arranged at intervals. The third perforated piece includes one or more third perforated plates (6.3) arranged at intervals. The ratio of the total area of ​​through holes to the area of ​​the plate in the first perforated plate is P1, the ratio of the total area of ​​through holes to the area of ​​the plate in the second perforated plate is P2, and the ratio of the total area of ​​through holes to the area of ​​the plate in the third perforated plate is P3, and P1 < P2 < P3.

3. The phosphorus removal device according to claim 2, characterized in that, The value of P1 is 2.5% to 3%; the value of P2 is 3.5% to 4.5%; and the value of P3 is 5.0% to 6.0%.

4. The phosphorus removal device according to claim 2, characterized in that, The first perforated plate (6.1), the second perforated plate (6.2), and the third perforated plate (6.3) are all detachably mounted on the inner wall of the inner cylinder body (2.1) via a support member (9).

5. The phosphorus removal device according to claim 2, characterized in that, The first perforated component includes two spaced-apart first perforated plates, the second perforated component includes two spaced-apart second perforated plates, and the third perforated component includes two spaced-apart third perforated plates.

6. The phosphorus removal device according to any one of claims 1-5, characterized in that, The inclined plate assembly (7) is mounted on the inner wall of the outer cylinder body (1.1) and the outer wall of the inner cylinder body (2.1) via an inclined plate support frame (10); the inclined plate assembly (7) includes multiple settling inclined plates spaced apart and staggered, and the gaps between the multiple settling inclined plates form a flow channel.

7. The phosphorus removal device according to claim 6, characterized in that, Along the direction of water flow, the inlet pipe (3) includes a horizontal pipe section, an arc-shaped transition pipe section and a vertical pipe section arranged in sequence. The outlet end face of the vertical pipe section is 5-20cm higher than the upper end face of the outlet channel (8).

8. The phosphorus removal device according to claim 6, characterized in that, The outlet channel (8) is a ring-shaped water collection trough.

9. The phosphorus removal device according to claim 6, characterized in that, The lower part of the receiving cavity of the outer cylinder body (1.1) is a frustum structure that is wider at the top and narrower at the bottom, and the mud discharge pipe (5) is connected to the lower side of the frustum structure.

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