CN201115796Y - Percolation clarifier - Google Patents

Abstract

A percolation clarification tank, which includes a rectangular flat-bottomed tank body, a water inlet shaft leading to the bottom of the tank body is provided in the middle of the tank body, and a water distribution channel is connected to both sides of the bottom of the water inlet shaft. The side wall is connected with a plurality of water distribution pipes arranged at the bottom of the pool body, herringbone boards are arranged side by side in the water distribution area formed on the upper part of the water distribution pipes, a suspension area is formed on the upper part of the water distribution area, and a clear water area is formed on the upper part of the suspension area , in the clean water area, there is an inclined water pipe, and a water collection pipe is arranged at the upper end of the clean water area, and a V-shaped water collection canal is arranged in the middle of the water collection pipe. The side wall of the V-shaped water collection canal and the water collection pipe The inner ends of the tanks are connected, and a sludge concentration chamber is provided on both sides of the water inlet shaft, and a sludge discharge screw conveyor is installed at the bottom of the sludge concentration chamber. This percolation clarifier has simple pool type, small footprint, short residence time, high volume utilization rate, certain biological characteristics, and no large mud scraping device. It is a high-efficiency clarifier with strong adaptability.

Description

Percolation clarifier

technical field

The utility model relates to the technical field of water treatment and clarification equipment, which is an efficient water treatment device, in particular to a new concept of percolation and clarification. Not only for water supply treatment, but also for the treatment of sewage reuse.

Background technique

According to the working state of the sludge, the clarifier can be divided into two categories: the sludge suspension type clarifier and the sludge circulation type clarifier. The former plays the role of contact flocculation by maintaining a layer of mud layer in the tank. The latter enhances contact flocculation through the circulation of flocs in the flocculation zone. Sludge suspension clarifiers include suspension clarifiers (cone bottom) and pulse clarifiers (with pulse generators). Their disadvantages are that the rising velocity in the clear water area is low (0.7-1.0mm/s), the residence time is long (about 60min or more), and they cannot bear the impact load with large changes.

The stability of the suspension layer in the pulse clarifier mainly depends on the pulse action, so a pulse generating device is required to make the suspended sludge layer periodically expand and compress under the action of the pulsating water flow to achieve the purpose of water purification. The rising flow rate in the clear water area of the pulse clarifier is generally around 1.0mm/s. If the rising velocity is too high, the suspended mud layer will be destroyed and the water purification effect will be reduced.

Utility model content

The purpose of this utility model is to provide a percolation clarifier that integrates the advantages of other types of clarifiers under the premise of ensuring the water quality of the clarifier. It makes full use of the volume of the tank body, strengthens the concentration of sludge, and increases the rising velocity of the suspension area. , shorten the residence time, increase the purification capacity of the clarifier, simplify the structure without a pulse generating device, and reduce the cost of infrastructure.

To achieve the above object, the utility model takes the following technical solutions:

A percolation clarifier, characterized in that it includes a rectangular flat-bottomed tank body, a water inlet shaft leading to the bottom of the tank body is provided in the middle of the tank body, and a water distribution channel is connected to both sides of the bottom of the water inlet shaft. The two side walls of the water distribution channel are connected with a plurality of water distribution pipes arranged at the bottom of the pool body. Herringbone boards are arranged side by side in the water distribution area formed on the upper part of the water distribution pipes. A suspension area is formed on the upper part of the water distribution area. A clear water area is formed, and inclined pipes are arranged in the clear water area, and water collecting pipes are arranged at the upper end of the clear water area, and a V-shaped water collecting canal is arranged in the middle of the water collecting pipes. The side wall of the V-shaped water collecting canal and the The inner ends of the water collection pipes are connected, and an outlet pipe is provided at one end of the V-shaped water collection channel, and a raw water inlet pipe protruding from the side wall of the pool is connected to the side wall of the water inlet shaft. The sludge concentration chamber is provided with a sludge discharge screw conveyor at the bottom of the sludge concentration chamber.

There are multiple water outlet holes on the side wall of the water distribution pipe, multiple water inlet holes on the side wall of the water collection pipe, and a vertical clean water backflow pump to deliver clean water to the water inlet shaft on the V-shaped water collection main channel .

A vertical clear water return pump with automatic flow adjustment is set to balance the rising flow rate of the suspension zone to keep it relatively stable, thereby effectively preventing the impact of sudden changes in the influent load on the suspension zone and the quality of the effluent.

Fibrous fillers are longitudinally arranged in the suspension area.

Appropriately increasing the height of the suspension zone prolongs the residence time of the high-density sludge in the suspension zone, which is beneficial to the improvement of its biological performance and has a certain effect on the removal of some trace pollutants.

The fiber filler in the suspension area can maintain the stability and biological properties of the high-concentration suspended active sludge layer and enhance the ability to resist impact loads.

The upper part of the pool body is provided with a coagulant aid dosing device, and the output pipe of the coagulant aid dosing device is inserted into the water inlet shaft. When there are many trace pollutants in the raw water, a powdered activated carbon dosing device can be installed on the upper part of the pool body, and the delivery pipe of the powdered activated carbon dosing device is connected to the raw water inlet pipe.

The inclined channel wall of the V-shaped catchment main channel forms an angle of 60° with the horizontal direction, and the side walls of the inclined pipe and the clear water area form an angle of 60° with the horizontal direction. Since the pool walls on both sides of the upper part of the clear water area are 60° to the horizontal, it is beneficial to the installation of the inclined pipe, and at the same time, the water flow section in the inclined pipe area is increased.

The beneficial effects of the utility model are:

1. The pool type is flat bottom, the volume utilization rate is high, the effluent water quality is ideal, and the investment and operation costs are saved.

2. Reach a higher rising flow rate in the clear water area, the hydraulic load can reach more than 10m ³ /m ² ·h, and the sedimentation efficiency is high.

3. The suspension layer has a high concentration of sludge and has the functions of adsorption, contact, percolation and certain biological treatment (including the adsorption and biological characteristics of activated carbon).

4. The vertical clear water return pump with automatic flow adjustment can effectively prevent the sudden change of the inflow load from impacting the suspension area and the effluent water quality.

5. The sludge produced by high-concentration sludge has a low moisture content, which is conducive to dehydration and drying.

6. The pool type is simple, without large-scale mud scraping equipment, saving construction and daily management costs.

Description of drawings

Fig. 1 is the plane view of the utility model percolation clarifier.

Fig. 2 is the A-A sectional view of the percolation clarifier of the utility model.

Fig. 3 is the sectional view of B-B of the percolation clarifier of the utility model.

Fig. 4 is the C-C sectional view of the percolation clarifier of the utility model.

Fig. 5 is a D-D sectional view of the percolation clarification tank of the present invention.

FIG. 6 is an enlarged schematic view of part A of FIG. 5 .

Attached icons: 1. Tank body, 2. Raw water inlet pipe, 3. Water inlet shaft, 4. Coagulant aid dosing device, 5. Water distribution channel, 6. Water distribution pipe, 7. Herringbone plate, 8. Suspension area, 9. Fiber filler, 10. Inclined pipe, 11. Water collection pipe, 12. V-shaped water collection channel, 13. Vertical clear water return pump, 14. Sludge concentration chamber, 15. Mud discharge screw conveyor, 16. Outlet Water pipe, 17. Water distribution area, 18. Clean water area, 19. Water outlet hole, 20. Water inlet hole, 21. Output pipe, 22. Side wall of clean water area, 23. Powdered activated carbon dosing device, 24. Delivery pipe.

Detailed ways

See Figures 1 to 6: a percolation clarifier, which includes a rectangular flat-bottomed tank body 1, in the middle of the tank body is provided with a water inlet shaft 3 leading to the bottom of the tank body, at the bottom of the water inlet shaft 3 Both sides are connected with a water distribution canal 5, and the two side walls of the water distribution canal 5 are connected with a plurality of water distribution pipes 6 arranged at the bottom of the pool body. The upper part of district 17 is formed with suspending area 8, is formed with clean water district 18 at the top of this suspending district 8, is provided with inclined pipe 10 in the clear water district 18, is provided with and is arranged with water collecting pipe 11 at the upper end of clean water district 18, in water collecting pipe The middle part of 11 is provided with V-shaped water collecting channel 12, and the side wall of this V-shaped water collecting channel 12 communicates with the inner end of water collecting pipe 11, and one end of V-shaped water collecting channel 12 is provided with outlet pipe 16, in The side wall of the water inlet shaft 3 is connected with a raw water inlet pipe 2 protruding from the side wall of the pool body, and a sludge concentration chamber 14 is arranged on both sides of the water inlet shaft 3, and a mud discharge screw is arranged at the bottom of the sludge concentration chamber 14 Conveyor 15.

The side wall of the water distribution pipe 6 is provided with a plurality of water outlet holes, and the side wall of the water collection pipe 11 is provided with a plurality of water inlet holes 20, and the V-shaped water collection channel 12 is provided with a channel for transporting clean water into the water inlet shaft 3. Vertical clear water return pump 13.

A fibrous filler 9 is arranged in the suspension zone 8 . The fiber filler 9 is in the shape of a cylindrical brush and is made of fiber material, which can maintain the stability and biological properties of the high-concentration suspended active sludge layer in the suspension area 8, and enhance the ability to resist impact loads.

A coagulant aid dosing device 4 is provided on the upper part of the pool body 1 , and an output pipe 21 of the coagulant aid dosing device 4 is inserted into the water inlet shaft 3 .

When there are many trace pollutants in the raw water, a powdered activated carbon dosing device 23 can be arranged on the upper part of the pool body, and the delivery pipe 24 of the powdered activated carbon dosing device 23 is connected to the raw water inlet pipe 2 .

The inclined channel wall of the V-shaped catchment main channel 12 forms an angle of 60° with the horizontal direction, and the side wall 22 of the inclined pipe 10 and the clear water area forms an angle of 60° with the horizontal direction.

The working process of the utility model is: adding a coagulant to the raw water (powdered activated carbon should be added to the raw water pipeline when dealing with slightly polluted water), and after gas-water separation, the raw water is passed through the raw water inlet pipe 2, the water inlet shaft 3, and the water distribution channel. 5 into the water distribution pipe 6, before the raw water enters the water distribution channel 5, the organic polymer coagulant (polyacrylamide) is added to the water inlet shaft 3 through the output pipe 21 of the coagulant dosing device 4, and the raw water flows from the water distribution pipe The holes 19 of 6 flow out, get fully mixed, pass through the herringbone plate 7 to stabilize the flow, and rise to the suspension area 8, so that the high-concentration active sludge formed in the suspension area 8 is in a dynamic equilibrium state, and the micro flocs in the raw water and the active sludge The slag is fully contacted, flocculated, adsorbed, etc., which increases the density of the floc particles, increases the concentration of the sludge, and infiltrates the particulate matter. The formed sludge particles are larger, heavier, and settle faster. It adapts to the high ascending flow rate in the suspension area, and the processing efficiency is higher. After the water flow passes through the suspension area 8, it continues upward and is further purified through the inclined water pipe 10. The water outlet of the outlet hole 19 of the inclined water pipe 10 flows into the water collection pipe 11, and then flows into the V-shaped water collection main channel 12 from the water collection pipe 11. Inside, its side wall is 60° to the horizontal; the side walls 22 on both sides of the inclined water pipe 10 and the clear water area are at an angle of 60° to the horizontal direction, which is conducive to the installation of the inclined water pipe 10 and increases the clean water area Water flow section; the clear water entering the V-shaped water collecting channel 12 is discharged through the outlet pipe 16;

The vertical clear water return pump 13 is used to balance the rising flow rate of the suspension area, and the vertical clear water return pump 13 transports clear water to the water inlet shaft to keep the suspension area relatively stable, thereby effectively preventing the sudden change of the intake load from causing The impact on the suspended area and effluent water quality.

The excess aged sludge in the suspension area 8 overflows into the sludge concentration chamber 14. The sludge left standing in the sludge concentration chamber has a low moisture content and is discharged through the sludge discharge screw conveyor 15, which can be directly used for dehydration and drying.

This percolation clarifier has simple pool type, small footprint, short residence time, high volume utilization rate, certain biological characteristics, and no large mud scraping device. It is a high-efficiency clarifier with strong adaptability.

Claims (6)

1, a kind of percolation clarifier, it is characterized in that: it comprises the pond body (1) of a rectangular flat bottom, is provided with the water inlet shaft (3) leading to the bottom in the pond body in the middle part of the pond body, in the water inlet shaft ( 3) There are water distribution channels (5) connected to both sides of the bottom, and a plurality of water distribution pipes (6) arranged on the bottom of the pool body are connected to the two side walls of the water distribution channel (5), and the water distribution area formed on the upper part of the water distribution pipes (6) (17) is provided with herringbone boards (7) side by side in the top of the water distribution area (17), forming a suspension area (8), forming a clear water area (18) on the top of the suspension area (8), in the clear water area ( 18) An inclined pipe (10) is arranged inside, and a water collection pipe (11) is arranged on the upper end of the clear water area (18), and a V-shaped water collection main channel (12) is arranged in the middle of the water collection pipe (11). The side wall of the shape water collecting channel (12) communicates with the inner end of the water collecting pipe (11), and one end of the V-shaped water collecting channel (12) is provided with an outlet pipe (16), and at the water inlet shaft (3) The side wall is connected with a raw water inlet pipe (2) protruding from the side wall of the tank body, and a sludge concentration chamber (14) is provided on both sides of the water inlet shaft (3), and a sludge concentration chamber (14) is arranged at the bottom of the sludge concentration chamber (14). Mud discharge screw conveyor (15). 2. The percolation clarifier according to claim 1, characterized in that: a plurality of water outlet holes (19) are provided on the side wall of the water distribution pipe (6), and a plurality of outlet holes (19) are provided on the side wall of the water collection pipe (11) The water inlet hole (20) is provided with a vertical clear water backflow pump (13) that transports clear water in the water inlet shaft (3) on the V-shaped catchment main channel (12). 3. The diafiltration clarification tank according to claim 1 or 2, characterized in that: fiber filler (9) is arranged in the suspension area (8). 4. The percolation clarification tank according to claim 3, characterized in that: a coagulant dosing device (4) is provided on the top of the tank body 1, and the output pipe (4) of the coagulant dosing device (4) 21) Insert into the water inlet shaft (3). 5. The percolation clarification tank according to claim 4, characterized in that: a powdered activated carbon dosing device (23) is arranged on the upper part of the tank body, and the delivery pipe (24) of the powdered activated carbon dosing device (23) is fed into the raw water The water pipes (2) are connected and communicated. 6. The percolation clarifier according to claim 5, characterized in that: the inclined channel wall of the V-shaped water collecting channel (12) forms an angle of 60° with the horizontal direction, and the inclined pipe (10) and the clear water area (18) The side wall (22) of the horizontal direction forms an angle of 60°.

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