CN103241815B - Water purifying device - Google Patents

Abstract

The invention belongs to the technical field of sewage treatment devices, particularly relates to a water purifying device capable of processing the high-turbidity water, and aims at providing a water purifying device integrating the coagulation, settlement and filtering, occupying a small land area and ensuring the stable water quality. The technical scheme adopted by the invention is as follows: the water purifying device comprises a cyclone mixing reaction area, a high-efficiency oblique plate settling area and a shallow-layer filtering area and is a continuous concentric reactor, the upper part of a water purifying device body is a cylindrical shell, the lower part of the device body is a conical shell, the middle part of the cylindrical shell is a circular filtering pond which is concentric with the cylindrical shell, and an area defined by the conical shell is the cyclone mixing reaction area.

Description

Water purification device

technical field

The invention belongs to the technical field of sewage treatment devices, and in particular relates to a water purification treatment device capable of treating high turbidity water.

Background technique

The sedimentation process forms used in sewage treatment mainly include advection tanks, small-space inclined plate and inclined tube sedimentation tanks, etc. Among them, the inclined plate with small spacing and the inclined tube sedimentation tank fully embody the advantages of the shallow tank, and the sedimentation efficiency is very high, and the smaller the distance between the inclined plates, the higher the sedimentation efficiency. However, in practical applications, after a period of operation of the inclined plate sedimentation tank with a small inclined plate spacing, or when the water quality and quantity change, its sedimentation efficiency and effluent water quality will drop significantly, resulting in serious mud accumulation and blockage between the inclined pipe and the inclined plate. Even collapsed inclined pipes and inclined plates. Therefore, many water plants use advection pools that occupy a large area and have low efficiency, but are quite stable in operation. The main reason for the above problems is that for the inclined tube sedimentation tank, its hexagonal structure is not conducive to mud discharge. For inclined plate sedimentation tanks, since the smaller the spacing, the higher the sedimentation efficiency, it is often used in inclined plate sedimentation tanks with smaller spacing, but when the spacing of the inclined plates is reduced, the mud discharge will not be smooth, which will lead to Mud and blockage.

In addition to this deficiency, when the existing technology is used to directly purify high-concentration sewage, the quality of the effluent water can reach the "Discharge Standard of Pollutants for Urban Sewage Treatment Plants" GB 18918-2002 Class A Standard. Those that can barely meet this standard are generally complex in structure, high in precision, high in cost, or use a large amount of chemicals, or have short backwashing cycles and high energy consumption.

Contents of the invention

The invention overcomes the deficiencies of the prior art, and the technical problem to be solved is to provide a water purification treatment device which integrates coagulation, sedimentation and filtration, occupies a small area, and has stable effluent quality.

In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: the water purification treatment device, including the swirl mixing reaction zone, the high-efficiency inclined plate sedimentation zone and the shallow filter zone, is a continuous concentric circle reactor, the equipment body The upper part is a cylindrical shell, the lower part of the equipment body is a conical shell, the middle part of the cylindrical shell is a circular filter pool concentric with the cylindrical shell, and the area surrounded by the conical shell is a swirl mixing reaction zone. The part between the cylindrical shell and the filter tank is a high-efficiency inclined plate sedimentation zone, and the inside of the filter tank is a shallow filter zone; the lower part of the conical shell is provided with an annular water distribution pipe surrounding the conical shell, The water distribution pipe is provided with a plurality of branch pipes to communicate with the swirl mixing reaction zone, the swirl mixing reaction zone is provided with a mud discharge pipe, the lower port of the mud discharge pipe is located at the bottom of the swirl flow mixing reaction zone, and the mud discharge pipe The upper port of the mud discharge pipe is connected to the atmosphere, and the mud outlet in the middle of the mud discharge pipe extends out of the equipment body; the middle part of the high-efficiency sloping plate sedimentation area is provided with a sloping plate, and the sloping plate includes an upper sloping plate and a lower sloping plate that are fitted together plate; the upper part of the high-efficiency sloping plate sedimentation area is provided with a plurality of water collection tanks, and the water collection tanks are evenly distributed along the radial direction; the position corresponding to the filter tank and the water collection tanks is provided with water distribution holes; The water distribution baffle, the inner upper part of the water distribution baffle is provided with an annular drainage groove, and the drainage groove is connected with a water outlet pipe, and the water outlet pipe passes through the high-efficiency inclined plate sedimentation area and protrudes outside the equipment body.

The cone angle of the conical shell is 60°.

The angle formed by the oblique holes of the upper inclined plate and the lower inclined plate is 90°-120°, and the height of the lower inclined plate is 1/4-1/3 of the total height of the inclined plate.

The plurality of branch pipes that the water distribution pipe communicates with the swirl mixing reaction zone are all tangent to the equipment body.

The water distribution baffle is provided with double-layer filter materials.

The double-layer filter material is graded from bottom to top and from coarse to fine.

The filter is provided with a backwash air pipe and a backwash drainage pipe, the backwash air pipe passes through the equipment body and the high-efficiency inclined plate sedimentation area and is arranged circularly inside the filter, and the backwash drainage pipe passes through the equipment body and the high-efficiency inclined plate The plate sedimentation area passes vertically upwards from the center of the filter tank to a position lower than the notch of the drainage tank.

The inclined plate is replaced with an inclined tube.

The quantity of the sump is 3-6.

The number of the branch pipes is 3-6.

Compared with the prior art, the present invention has the following beneficial effects.

1. The present invention adopts the form of annular water distribution, specifically the tangential direction of water distribution, to ensure that the raw water entering the system forms a swirling flow form with the pool wall, so that the raw water entering the equipment forms a hydraulic swirl rising effect. Impact the sludge layer, using the formed sludge layer particles as a carrier, so that the flocs formed by the coagulant and coagulant added to the system gradually increase according to the hydraulic change, and use the reflection of the pool wall to form a substance that is easy to settle ; This form of reaction design saves about 15% of the amount of flocculant used, and as the swirl rises, the flocs formed continue to increase and become sludge that is easy to settle and remove.

2. The high-efficiency inclined plate precipitation area adopts double-layer inclined plates, and the inclined holes of the upper inclined plate and the lower inclined plate are arranged (90-120?), and the height of the lower inclined plate is 1/4-1 of the total height of the inclined plate /3, prolonging the popular time of raw water in the inclined plate area, reducing the appearance of turbulent flow, making the water outlet effect better, reducing the load of subsequent treatment facilities, and improving the sedimentation efficiency. The inclined plate design of the present invention does not require the inclined plate spacing while improving the sedimentation efficiency.

3. The water in the shallow filtration area is entered by the water distribution baffle, and the filtration form is the same flow, and the direction of the water flow is the same as the direction of the filter material gradation, which maximizes the interception ability of the filter material and prolongs the filter backwash cycle ;The form of filter material adopts double-layer filter material, the raw water enters from the bottom, and the filter material is graded from coarse to fine in order to maximize the interception ability of the filter material; the backwash adopts the combination of forward air washing and water washing, The expansion of the filter layer is minimized, and the pollutants attached to the filter material are discharged from the system under the action of water flow after scrubbing with air. Compared with existing similar products, the energy consumption of backwashing in the present invention can be saved by 40%-50%, and the water consumption of backwashing can be saved by 40%-60%.

4. The water purification index of the water purification treatment device of the present invention is compared with the traditional process device, can handle the sewage with a turbidity up to 2000mg/L, and make the clarification effect suspended matter content reach 5mg/L, compared with "urban sewage treatment plant" Pollutant Discharge Standard "GB 18918-2002 Class A Class A standard of 10mg/L has been increased by 50%; the water consumption of the discharged sludge is 3%-5% lower than that of the existing technology, and it is easier to compress.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing.

Fig. 1 is a schematic diagram of the layout of the present invention.

Fig. 2 is a sectional view along line 1-1 of Fig. 1 .

Figure 3 is a schematic diagram of the layout of the water distribution pipes.

In the figure, 1 is the cyclone mixing reaction zone, 2 is the high-efficiency inclined plate sedimentation area, 3 is the shallow filter area, 4 is the equipment body, 5 is the filter tank, 6 is the water distribution pipe, 7 is the mud discharge pipe, and 8 is the inclined plate , 9 is a sump, 10 is a water distribution baffle, 11 is a drainage tank, 12 is an outlet pipe, 13 is a backwash air pipe, and 14 is a backwash drain.

Detailed ways

The present invention will be further described below in conjunction with specific examples.

The water purification treatment device, including the swirl mixing reaction zone 1, the high-efficiency inclined plate sedimentation zone 2 and the shallow filter zone 3, is a continuous concentric circular reactor. The upper part of the equipment body 4 is a cylindrical shell, and the lower part of the equipment body 4 It is a conical shell, and the middle part of the cylindrical shell is a circular filter pool 5 concentric with the cylindrical shell. The area surrounded by the conical shell is a swirl mixing reaction zone 1. The cylindrical shell and the filter pool The part between 5 is the high-efficiency inclined plate sedimentation zone 2, and the inside of the filter tank 5 is a shallow filter zone 3; the lower part of the conical shell is provided with an annular water distribution pipe 6 surrounding the conical shell, and the distribution The water pipe 6 is provided with a plurality of branch pipes to communicate with the swirl mixing reaction zone 1, and the swirl mixing reaction zone 1 is provided with a mud discharge pipe 7, and the lower port of the mud discharge pipe 7 is located at the bottom of the swirl flow mixing reaction zone 1, The upper port of the mud discharge pipe 7 communicates with the atmosphere, and the mud outlet in the middle of the mud discharge pipe 7 extends outside the equipment body 4; the middle part of the high-efficiency inclined plate sedimentation area 2 is provided with a slant plate 8, and the slant plate 8 includes a fitting The upper inclined plate and the lower inclined plate together; the upper part of the high-efficiency inclined plate sedimentation area 2 is provided with a plurality of water collection tanks 9, and the water collection tanks 9 are evenly distributed in the radial direction, and the filter tank 5 corresponds to the water collection tanks 9 A water distribution hole is provided at the position of the filter tank 5. A water distribution baffle 10 is arranged inside the filter tank 5. An annular drainage groove 11 is arranged on the inner upper part of the water distribution baffle 10. The drainage groove 11 is connected with a water outlet pipe 12, and the water outlet pipe 12 protrudes outside the equipment body 4 through the high-efficiency inclined plate precipitation area 2 .

The cone angle of the conical shell is 60°.

The angle formed by the oblique holes of the upper inclined plate and the lower inclined plate is 90°-120°, and the height of the lower inclined plate is 1/4-1/3 of the total height of the inclined plate 8 .

The plurality of branch pipes that the water distribution pipe 6 communicates with the swirl mixing reaction zone 1 are all tangent to the equipment body 4 .

The water distribution baffle 10 is provided with double layers of filter material.

The double-layer filter material is graded from bottom to top and from coarse to fine.

The filter tank 5 is provided with a backwash gas pipe 13 and a backwash drain pipe 14. The backwash gas pipe 13 passes through the equipment body 4 and the high-efficiency inclined plate sedimentation zone 2 and is arranged circularly inside the filter tank 5. The backwash drain pipe 14 passes through the equipment body 4 and the high-efficiency sloping plate sedimentation zone 2 and passes vertically upward from the center of the filter tank 5 to a position lower than the notch of the drainage tank 11.

Described inclined plate 8 replaces with inclined pipe.

The quantity of the sump is 3-6.

The number of the branch pipes is 3-6.

When in use, the raw water enters the swirling flow mixing reaction zone 1 from the water distribution pipe 6 through the branch pipe in the form of a swirling flow, forming a hydrocyclone rising effect, and impacting the sludge layer at the water inlet end with the help of the inlet water pressure, and utilizing the formed sludge The layer particles are used as the carrier, so that the flocs formed by the coagulant and coagulant added to the system gradually increase according to the hydraulic change, and use the reflection of the pool wall to form substances that are easy to settle; the raw water rises in the swirl mixing reaction zone 1 , enter the upper part of the high-efficiency inclined plate precipitation area 2 through the inclined plate 8, and enter the shallow filter area 3 from the sump 9, and filter through the filter material from the bottom of the filter tank 5 from bottom to top under the action of the water distribution baffle 10, and filter The final clear water is discharged by the outlet pipe 12 communicated with the drain tank 11.

The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Within the scope of knowledge of those of ordinary skill in the art, various modifications can be made without departing from the gist of the present invention. kind of change.

Claims (10)

1. The water purification device, including the swirl mixing reaction zone (1), the high-efficiency inclined plate sedimentation zone (2) and the shallow filtration zone (3), is a continuous concentric circle reactor, and the upper part of the equipment body (4) It is a cylindrical shell, the lower part of the equipment body (4) is a conical shell, the middle part of the cylindrical shell is a circular filter pool (5) concentric with the cylindrical shell, and the area surrounded by the conical shell is a rotary Flow mixing reaction zone (1), the part between the cylindrical shell and the filter tank (5) is a high-efficiency inclined plate sedimentation zone (2), and the inside of the filter tank (5) is a shallow filter zone (3); It is characterized in that: the lower part of the conical shell is provided with an annular water distribution pipe (6) surrounding the outside of the conical shell, and the water distribution pipe (6) is provided with a plurality of branch pipes to communicate with the swirl mixing reaction zone (1), The swirl mixing reaction zone (1) is provided with a mud discharge pipe (7), the lower port of the mud discharge pipe (7) is located at the bottom of the swirl flow mixing reaction zone (1), and the upper end of the mud discharge pipe (7) is The port is connected to the atmosphere, and the mud outlet in the middle of the mud discharge pipe (7) protrudes from the outside of the equipment body (4); the middle part of the high-efficiency sloping plate sedimentation area (2) is provided with a sloping plate (8), and the sloping plate (8 ) includes an upper sloping plate and a lower sloping plate that are bonded together; the upper part of the high-efficiency sloping plate sedimentation area (2) is provided with a plurality of water collection grooves (9), and the water collection grooves (9) are uniformly arranged in the radial direction, The position corresponding to the filter tank (5) and the water collection tank (9) is provided with a water distribution hole, the inside of the filter tank (5) is provided with a water distribution baffle (10), and the inner upper part of the water distribution baffle (10) is provided with An annular drainage groove (11), the drainage groove (11) is connected with a water outlet pipe (12), and the water outlet pipe (12) protrudes outside the equipment body (4) through the high-efficiency inclined plate sedimentation area (2). 2. The water purification device according to claim 1, characterized in that: the cone angle of the conical shell is 60°. 3. The water purification treatment device according to claim 1, characterized in that: the angle formed by the inclined holes of the upper inclined plate and the lower inclined plate is 90°-120°, and the height of the lower inclined plate is slanted 1/4-1/3 of the total height of the plate (8). 4. The water purification treatment device according to claim 1, characterized in that: the plurality of branch pipes connected by the water distribution pipe (6) to the swirl mixing reaction zone (1) are all tangent to the equipment body (4) . 5. The water purification treatment device according to claim 1, characterized in that: the water distribution baffle (10) is provided with double-layer filter materials. 6. The water purification device according to claim 5, characterized in that: the double-layer filter material is graded from bottom to top and from coarse to fine. 7. The water purification treatment device according to claim 1, characterized in that: the filter (5) is provided with a backwash air pipe (13) and a backwash drain pipe (14), and the backwash air pipe (13) Through the equipment body (4) and the high-efficiency sloping plate sedimentation area (2), it is arranged circularly inside the filter (5), and the backwash drainage pipe (14) passes through the equipment body (4) and the high-efficiency inclined plate sedimentation area (2 ) from the center of the filter tank (5) vertically upwards to a position lower than the notch of the drainage tank (11). 8. The water purification treatment device according to claim 1 or 3, characterized in that: the inclined plate (8) is replaced by an inclined pipe. 9. The water purification treatment device according to claim 1, characterized in that: the number of the water collection tanks (9) is 3-6. 10. The water purification device according to claim 1, characterized in that: the number of said branch pipes is 3-6.