CN116715329A - Water treatment equipment of small-water-quantity multi-cylinder circulating agglomeration granulation fluidized bed - Google Patents

Abstract

The invention provides a small water volume multi-cylinder circulating agglomeration granulation fluidized bed water treatment equipment, which includes a tank. The tank is equipped with an inner cylinder, a middle cylinder and an outer cylinder in sequence from the inside to the outside. The bottom end of the tank is closed. And the top is open, the top of the outer cylinder is closed, the top of the tank is higher than the top of the outer cylinder, the internal cavity of the tank above the top of the outer cylinder is the water collection area, and the bottom of the outer cylinder is below the closed mixing cylinder. The internal cavity of the outer tank is the sludge concentration area; the open top of the tank above the water collection area is equipped with a sedimentation tank. The invention is used to treat water with high pollutant content. It adopts an open top, an inclined tube sedimentation tank with inclined tubes/plates and an overflow weir to discharge water. The equipment of the present invention adopts a four-layer structure, and the separation zone is arranged between the outer cylinder and the tank, which solves the problems in the prior art that the structure of the separation zone located at the top is complicated, and the adaptability of water quality and quantity is poor, and further improves the system. Economy.

Description

A small water volume multi-cylinder circulating agglomeration granulation fluidized bed water treatment equipment

Technical field

The invention belongs to the technical field of water treatment, relates to a circulating agglomerating and granulating fluidized bed with high pollutant content, and specifically relates to a small water volume multi-cylinder circulating agglomerating and granulating fluidized bed water treatment equipment.

Background technique

The separation of suspended solids in water is one of the hot issues in the field of water treatment. With the continuous development of the economy and society, and the continuous improvement of people's living standards, whether in the field of industrial water treatment, residential use, or drainage treatment, the requirements for the removal of suspended solids in water At the same time, as the water environment continues to change, the content of suspended solids in water at all levels and types is also increasing. The upgrading and research and development of solid-liquid separation water treatment systems is an inevitable development trend in this field. At this stage, water treatment technology and equipment based on the theoretical basis of solid-liquid separation in suspended layers are widely used. Typical devices include France's Veolia Actiflo clarifier and France's Degremont company's DensaDeg high-density clarifier. The above-mentioned water treatment system has obvious water purification effect in actual operation, but it also has many problems such as large floor area and many ancillary equipment. At present, domestic water plants mostly adopt the precipitation + concentration process. After solid-liquid separation, the supernatant is discharged or recycled, and the sludge is discharged after dehydration. This method has problems such as low efficiency, large investment, large floor space, and high operating costs.

The Chinese invention patent application publication number CN112239257A discloses a high-efficiency solid-liquid separation and high-efficiency integrated mud-water separation equipment. The system has a reaction zone, a separation zone and a sludge concentration zone. The separation zone is equipped with a suspended layer filtration solid-liquid separation device; the suspended layer filtration solid-liquid separation device is divided into upper and lower parts. The upper part is a static suspended layer and the lower part is agitating. Suspension layer, the static suspension layer is filled with floating light suspension beads, and the stirring suspension layer is equipped with filter layer stirring blades. There is an inner cylinder and a middle cylinder in the reaction zone, and the tank, the middle cylinder and the inner cylinder are arranged coaxially from the outside to the inside. The bottom end of the inner cylinder is open, and the bottom end of the middle cylinder close to the bottom end of the inner cylinder shrinks inward, so that a reflux water slit is formed between the bottom end of the inner cylinder and the contracted inner wall of the middle cylinder, which is used to form a local negative pressure. , providing backflow force to achieve circular granulation. The system has the ability to treat high-concentration suspended solids and general-concentration wastewater. In actual operation, under small water volume conditions, the suspended layer filtration solid-liquid separation device of this equipment has good operating results. However, due to its structural complexity, the suspended beads in the separation zone need to be replaced and cleaned regularly. In addition, the separation zone The mixing device increases the energy consumption of the system and increases the operating cost of the system.

Contents of the invention

In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a small water volume multi-cylinder circulating agglomeration granulation fluidized bed water treatment equipment to solve the economical operation of the closed system in the prior art under small water volume conditions. Poor technical issues.

In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve:

A small water volume multi-cylinder circulating agglomeration granulation fluidized bed water treatment equipment, including a tank. The tank is equipped with an inner cylinder, a middle cylinder and an outer cylinder in sequence from the inside to the outside. The barrel and the tank are both coaxially fixed; the bottom end of the middle barrel is open, and the bottom end of the middle barrel is connected to a mixing barrel with a closed bottom end.

The bottom end of the tank is closed and the top is open, the top of the outer cylinder is closed, the top of the tank is higher than the top of the outer cylinder, and the internal cavity of the tank above the top of the outer cylinder is the water collection area. The internal cavity of the tank below the bottom end of the outer cylinder and located outside the closed mixing cylinder is the sludge concentration area.

The bottom end of the outer cylinder is open to form a separation water inlet, and a separation area is between the outer cylinder and the tank; the top of the separation area is connected to the water collection area; the bottom of the separation area Connected to the sludge concentration area.

The open top of the tank above the water collection area is provided with a sedimentation tank. An inclined tube/plate is provided in the sedimentation tank. An outlet weir is provided in the sedimentation tank outside the inclined tube/plate. A water collection tank is provided outside the sedimentation tank. Clear water It flows out from the water collection tank through the outlet weir.

The invention also has the following technical features:

The bottom end of the inner cylinder is open, and the inside of the inner cylinder is the granulation fluidization zone; the top of the inner cylinder is open, and the top of the middle cylinder is higher than the top of the inner cylinder, forming a backflow inlet. , the circulation area is between the inner cylinder and the middle cylinder; the top of the middle cylinder is open, the top of the outer cylinder is higher than the top of the middle cylinder, forming a sludge settling port, and the middle cylinder and There is a sludge settling area between the outer cylinders, and the bottom of the sludge settling area is connected with the sludge concentration area; the inside of the mixing barrel is a mixing area, and the top of the mixing area is connected with the granulation fluidization area and the circulation area Connected.

The bottom end of the middle cylinder close to the bottom end of the inner cylinder shrinks inward to form a shrinking inner wall. A reflux water slit is formed between the bottom end of the inner cylinder and the shrinking inner wall of the middle cylinder, which is used to form a local negative pressure and provide Return force; the bottom end of the shrinkage inner wall of the middle cylinder is connected to a mixing cylinder, and the reflux water slit is connected to the top of the mixing zone.

A stirring drive motor is installed on the top of the sedimentation tank, and the stirring drive motor drives the stirring shaft; the stirring shaft passes through the sedimentation tank, the water collection area, the closed top of the outer cylinder, the inner cylinder and the mixing cylinder in sequence and extends into The bottom of the tank; the stirring shaft in the inner cylinder is equipped with a stirring blade. The mixing shaft uses a water distributor fixedly installed in the mixing cylinder as a rotation support base. The bottom end of the mixing shaft is connected to the installation The scrapers at the bottom of the tank are connected, and the rotation of the stirring shaft drives the mixing blades and scrapers to rotate.

The bottom end of the mixing drum is connected with the water inlet pipe, and the water inlet pipe extends through the side wall of the tank to the outside of the tank; a sliding sealing sleeve is provided between the bottom of the water inlet pipe and the stirring shaft.

The bottom of the tank is an arc-shaped bottom, and the bottom of the mixing barrel is a conical bucket bottom.

The tank body is made of steel material.

The tank is installed on the base frame.

The outer wall of the tank is provided with a sludge discharge pipe communicating with the sludge concentration area in the tank.

The inner diameter of the mixing cylinder is less than or equal to the inner diameter of the inner cylinder.

Compared with the existing technology, the present invention has the following technical effects:

(Ⅰ) This invention is used to treat water with high pollutant content. It adopts an open top, an inclined tube settling tank with inclined tubes/plates and an overflow weir to discharge water. The equipment of the present invention adopts a four-layer structure in which the inner cylinder, the middle cylinder, the outer cylinder and the tank are coaxially arranged. The separation zone is arranged between the outer cylinder and the tank. The top of the tank is open, which solves the problem in the existing technology of The top separation zone has complex structures and poor water quality and quantity adaptability, which further improves the system economy.

(II) The multi-cylinder structure in the present invention improves the hydraulic retention time of the system, effectively optimizes the settling effect of tiny particles, significantly reduces the water turbidity and suspended solids in the separation zone, and achieves good removal under small water volume conditions. Effect.

(III) The present invention eliminates the suspended layer filtration solid-liquid separation device in the separation zone of the system in the prior art, reduces the overall height of the equipment, and reduces the installation height of the equipment. At the same time, the regular replacement of suspension beads is avoided, the workload of equipment installation and later maintenance is reduced, the operation is simpler and more convenient, and the equipment cost is reduced.

(IV) The present invention makes good use of the high-density properties of particles. The fine particles in the raw water gradually form spherical bodies with larger effective density through the agglomeration and flocculation process in the granulation zone. The larger spherical particles pass through the inner cylinder and are directly turned into the sludge concentration zone. The tiny particles that cannot be removed at the bottom are effectively removed after passing through the sludge settling zone and separation zone. Since the stirring blades in the separation zone in the prior art are removed, the energy consumption of the rotating motor is effectively reduced, further improving the economic benefits of the system.

(V) The present invention has good treatment effects on various types of water quality under various small water volume conditions. Based on the operating experience of the existing technology, when processing water quality with high organic matter content and low suspended matter density, the operation of the device of the present invention is mainly based on sand adding cycle granulation; when processing water quality with high dissolved organic matter content, the device of the present invention The operation of the device is mainly based on the circulation and granulation of powdered carbon.

Description of the drawings

Figure 1 is a schematic structural diagram of a small water volume multi-cylinder circulating agglomeration and granulation fluidized bed water treatment equipment.

FIG. 2 is a schematic top view of the structure in FIG. 1 .

The meaning of each number in the figure is: 1-inner cylinder, 2-middle cylinder, 3-outer cylinder, 4-tank, 5-mixing cylinder, 6-water collection area, 7-sludge concentration area, 8-separation inlet Water inlet, 9-separation zone, 10-sedimentation tank, 11-inclined tube/plate, 12-granulation fluidization zone, 13-return inlet, 14-circulation zone, 15-sludge settling port, 16-sludge settling Zone, 17-mixing zone, 18-shrink inner wall, 19-return water slit, 20-stirring drive motor, 21-stirring shaft, 22-stirring blade, 23-water distributor, 24-scraper, 25 -Water inlet pipe, 26-sliding sealing sleeve, 27-base frame, 28-sludge discharge pipe, 29-outlet weir, 30-sump, 31-motor bracket.

The specific content of the present invention will be further explained in detail below with reference to the examples.

Detailed ways

It should be noted that all equipment and components in the present invention, unless otherwise specified, are all equipment and components known in the prior art.

Specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent transformations based on the technical solution of this application fall within the protection scope of the present invention.

Example:

This embodiment provides a small water volume multi-cylinder circulating agglomeration granulation fluidized bed water treatment equipment, as shown in Figures 1 and 2, including a tank 4, and inner cylinders are installed in the tank 4 from the inside to the outside. 1. The middle cylinder 2 and the outer cylinder 3, the inner cylinder 1, the middle cylinder 2, the outer cylinder 3 and the tank 4 are all coaxially fixed; the bottom end of the middle cylinder 2 is open, and the bottom end of the middle cylinder 2 is connected and has a closed bottom end. Mixing cylinder 5.

As shown in Figure 1, the bottom end of the tank 4 is closed and the top end is open, the top of the outer cylinder 3 is closed, the top of the tank 4 is higher than the top of the outer cylinder 3, and the tank 4 is located in the internal cavity above the top of the outer cylinder 3 The body is the water collection area 6, and the internal cavity of the tank 4 below the bottom end of the outer cylinder 3 and located outside the closed mixing cylinder 5 is the sludge concentration area 7.

The bottom end of the outer cylinder 3 is open to form a separation water inlet 8. Between the outer cylinder 3 and the tank 4 is a separation area 9; the top of the separation area 9 is connected to the water collection area 6; the bottom of the separation area 9 is connected to the sludge concentration Area 7 is connected.

The open top of the tank 4 above the water collection area 6 is provided with a sedimentation tank 10. An inclined tube/plate 11 is provided in the sedimentation tank 10. An outlet weir 29 is provided in the sedimentation tank 10 outside the inclined tube/plate 11. The sedimentation tank A water collection tank 30 is provided outside 10, and clean water flows out from the water collection tank 30 through the outlet weir 29.

Preferably, in this embodiment, the inner cylinder 1, the middle cylinder 2, the outer cylinder 3 and the tank 4 are respectively fixed by connecting rings or ribs.

In this embodiment, the inner diameter of the sedimentation tank 10 is larger than the inner diameter of the tank 4 .

As a specific solution of this embodiment, the bottom end of the inner cylinder 1 is open, and the inner cylinder 1 is the granulation fluidization zone 12; the top end of the inner cylinder 1 is open, and the top end of the middle cylinder 2 is higher than the top end of the inner cylinder 1. A return water inlet 13 is formed, and a circulation area 14 is formed between the inner cylinder 1 and the middle cylinder 2; the top of the middle cylinder 2 is open, and the top of the outer cylinder 3 is higher than the top of the middle cylinder 2, forming a sludge settling port 15, and the middle cylinder 2 There is a sludge settling zone 16 between the outer cylinder 3 and the bottom of the sludge settling zone 16 connected to the sludge concentration zone 7; inside the mixing cylinder 5 is a mixing zone 17, and the top of the mixing zone 17 is connected to the granulating fluidization zone 12 Connected to circulation area 14.

As a specific solution of this embodiment, the bottom end of the middle cylinder 2 close to the bottom end of the inner cylinder 1 shrinks inward to form a shrinking inner wall 18, and a backlash is formed between the bottom end of the inner cylinder 1 and the shrinking inner wall 18 of the middle cylinder 2. The outflow slit 19 is used to form a local negative pressure and provide backflow force; the bottom end of the shrinking inner wall 18 of the middle cylinder 2 is connected to the mixing cylinder 5, and the return outflow slit 19 is connected to the top of the mixing zone 17.

In this embodiment, the sludge particles in the granulation fluidization zone 12 in the inner cylinder 1 reach a dynamic balance under the action of the inlet water flow power and its own gravity, and some of the formed sludge particles rise to the surface of the inner cylinder 1 with the water flow. The top of the cylinder, and circulates back to the circulation area 14 before reaching the top of the middle cylinder 2.

In this embodiment, after the sludge particles in the inner cylinder 1 , the middle cylinder 2 and the outer cylinder 3 reach a dynamic balance, some sludge particles fall to the sludge settling area 16 , and large particles of sludge are discharged from the sludge settling area 16 It sinks directly to the sludge concentration zone 7. The small particle sludge becomes larger in the separation zone 9 and then settles to the sludge concentration zone 7.

As a specific solution of this embodiment, a stirring drive motor 20 is installed on the top of the sedimentation tank 10, and the stirring drive motor 20 drives the stirring shaft 21; the stirring shaft 21 passes through the sedimentation tank 10, the water collection area 6, and the outer cylinder 3 in sequence. The top end of the inner cylinder 1 and the mixing cylinder 5 extend into the bottom of the tank 4; the stirring shaft 21 in the inner cylinder 1 is equipped with a stirring blade 22, and the stirring shaft 21 is a water distributor fixedly installed in the mixing cylinder 5 23 serves as a rotating support base. The bottom end of the stirring shaft 21 is connected to the scraper 24 installed at the bottom of the tank 4. The rotation of the stirring shaft 21 drives the stirring blades 22 and the scraper 24 to rotate.

Preferably in this embodiment, the top of the sedimentation tank 10 is open and has an open structure, and the stirring drive motor 20 is installed on the top of the sedimentation tank 10 through the motor bracket 31 .

In this embodiment, the stirring blades 22 are installed at a certain distance from each other. The uppermost stirring blade 22 does not exceed the top of the inner cylinder 1 , and the lowermost stirring blade 22 is just arranged at the position of the return water slit 19 to achieve the desired effect. Enhance the side wall effect and mud-water separation effect.

Preferably, in this embodiment, the water distributor 23 can be a common water distributor known in the prior art.

As a specific solution of this embodiment, the bottom end of the mixing barrel 5 is connected to the water inlet pipe 25, and the water inlet pipe 33 extends through the side wall of the tank 4 to the outside of the tank 2; the bottom of the water inlet pipe 25 is connected to the mixing tube 25. A sliding seal sleeve 26 is provided between the shafts 21 .

As a preferred solution of this embodiment, the bottom of the tank 4 is an arc-shaped bottom, and the bottom of the mixing barrel 5 is a cone-shaped bucket bottom.

As a preferred solution of this embodiment, the tank body 4 is made of steel material. Preferably in this embodiment, the height of the tank 4 is about 4m, and the diameter does not exceed 2m.

As a preferred solution of this embodiment, the tank 4 is installed on the base frame 27 .

As a preferred solution of this embodiment, a sludge discharge pipe 28 connected to the sludge concentration zone 7 in the tank 4 is provided on the outer wall of the tank 4 . In this embodiment, when the sludge in the sludge concentration zone 7 accumulates to a certain height, it is discharged from the sludge discharge pipe 28 .

As a preferred solution of this embodiment, the inner diameter of the mixing cylinder 5 is smaller than or equal to the inner diameter of the inner cylinder 1 .

When the equipment of the present invention is in use, agents such as microsand/pulverized carbon can be added to the raw water as needed. The raw water enters the mixing zone 17 in the mixing cylinder 5 in the tank 4 through the water inlet pipe 25, and then enters the mixing zone 17 in the inner cylinder 1. In the granulation fluidization zone 12, the particles continue to rise under the stirring of the stirring blades 22, and the particles gradually become larger. When they reach the top of the inner cylinder 1, the particles turn down and enter the circulation area 14 between the inner cylinder 1 and the middle cylinder 2. .

When the mud water circulates back to the return outlet slit 19, a negative pressure is formed locally, and the stirring effect is strengthened through the side wall, the fine sand/powdered carbon is separated from the sludge core, and the sludge particles flow back to the granulation in the inner cylinder 1 again. In the fluidization zone 12, this cycle continues until the height of the suspended layer reaches the top of the middle cylinder 2, when the large particles fall down, and enter the sludge concentration zone 7 from the sludge settling zone 16 until they settle to the bottom of the tank 4.

When passing through the sludge settling port 15, part of the tiny particle sludge directly enters the sludge concentration zone 7 without following the water flow. It continues to grow into large particles in the sludge settlement zone 16 and then enters the sludge concentration zone 7. A small amount of ineffective granular sludge passes through the sludge settling zone 16 with the water flow and then enters the separation zone 9 and continues to grow to a certain particle size and then sinks to the sludge concentration zone 7. If there are still unsettled sludge particles, they will rise through the water collection area 6 and then enter the sedimentation tank 10. If there are still tiny particles in the water after flocculation and sedimentation, they will further pass through the sedimentation inclined tube/plate 11 in the sedimentation tank 10. Solid-liquid separation is performed, and the separated clean water flows out from the water collection tank 30 after passing through the outlet weir 29 .

During the entire process, a single stirring drive motor 20 drives the stirring blades 22 and scraper 24 of the filter layer to rotate together through the stirring shaft 21 .

Claims (9)

1. The small-water-quantity multi-cylinder circulating agglomeration granulation fluidized bed water treatment equipment comprises a tank body (4), and is characterized in that an inner cylinder (1), a middle cylinder (2) and an outer cylinder (3) are sleeved in the tank body (4) from inside to outside in sequence, and the inner cylinder (1), the middle cylinder (2), the outer cylinder (3) and the tank body (4) are coaxially and fixedly arranged; the bottom end of the middle cylinder (2) is open, and the bottom end of the middle cylinder (2) is communicated with a mixing cylinder (5) with a closed bottom end;

the bottom end of the tank body (4) is closed, the top end of the outer cylinder (3) is open, the top end of the tank body (4) is higher than the top end of the outer cylinder (3), an inner cavity of the tank body (4) above the top end of the outer cylinder (3) is a water collecting area (6), and an inner cavity of the tank body (4) below the bottom end of the outer cylinder (3) and outside the closed mixing cylinder (5) is a sludge concentration area (7);

the bottom end of the outer cylinder (3) is open to form a separation water inlet (8), and a separation area (9) is arranged between the outer cylinder (3) and the tank body (4); the top of the separation zone (9) is communicated with the water collecting zone (6); the bottom of the separation zone (9) is communicated with the sludge concentration zone (7);

the open top of the tank body (4) above the water collecting area (6) is provided with a sedimentation tank (10), an inclined pipe/plate (11) is arranged in the sedimentation tank (10), an effluent weir (29) is arranged in the sedimentation tank (10) outside the inclined pipe/plate (11), a water collecting tank (30) is arranged outside the sedimentation tank (10), and clean water flows out of the water collecting tank (30) through the effluent weir (29).

2. The small-water-quantity multi-cylinder circulating agglomeration granulation fluid bed water treatment equipment as claimed in claim 1, wherein the bottom end of the inner cylinder (1) is open, and a granulation fluidization area (12) is arranged in the inner cylinder (1); the top end of the inner cylinder (1) is open, the top end of the middle cylinder (2) is higher than the top end of the inner cylinder (1) to form a backflow water inlet (13), and a circulation area (14) is arranged between the inner cylinder (1) and the middle cylinder (2); the top end of the middle cylinder (2) is open, the top end of the outer cylinder (3) is higher than the top end of the middle cylinder (2) to form a sludge sedimentation opening (15), a sludge sedimentation area (16) is arranged between the middle cylinder (2) and the outer cylinder (3), and the bottom of the sludge sedimentation area (16) is communicated with the sludge concentration area (7); the mixing drum (5) is internally provided with a mixing zone (17), and the top of the mixing zone (17) is communicated with a granulating and fluidizing zone (12) and a circulating zone (14).

3. The small-water-quantity multi-cylinder circulating agglomeration fluidized bed water treatment equipment according to claim 2, wherein the position of the bottom end of the middle cylinder (2) close to the bottom end of the inner cylinder (1) is contracted inwards to form a contracted inner wall (18), and a backflow water outlet slit (19) is formed between the bottom end of the inner cylinder (1) and the contracted inner wall (18) of the middle cylinder (2) and is used for forming local negative pressure to provide backflow power; the bottom end of the shrinkage inner wall (18) of the middle cylinder (2) is connected with a mixing cylinder (5), and a backflow water outlet slit (19) is communicated with the top end of the mixing zone (17).

4. The small-water-quantity multi-cylinder circulating agglomeration fluidized bed water treatment equipment according to claim 1, wherein a stirring driving motor (20) is arranged at the top of the sedimentation tank (10), and the stirring driving motor (20) drives a stirring shaft (21); the stirring shaft (21) sequentially passes through the sedimentation tank (10), the water collecting area (6), the closed top end of the outer cylinder (3), the inner cylinder (1) and the mixing cylinder (5) and stretches into the bottom of the tank body (4); stirring blade (22) is installed on (21) in inner tube (1), (21) regard as rotation supporting seat with mixing drum (5) internal fixation's water-locator (23), the bottom of (21) be connected with install in the bottom of jar body (4) scraper (24), the rotation of (21) stirring blade (22) and scraper (24) rotation of drive.

5. The small-water-quantity multi-cylinder circulating agglomerating fluidized bed water treatment device according to claim 4, wherein the bottom end of the mixing cylinder (5) is communicated with the water inlet pipe (25), and the water inlet pipe (33) penetrates through the side wall of the tank body (4) and extends out of the tank body (2); a sliding sealing sleeve (26) is arranged between the bottom of the water inlet pipe (25) and the stirring shaft (21).

6. The small-water-quantity multi-cylinder circulating agglomerating fluidized bed water treatment device according to claim 1, wherein the bottom of the tank body (4) is an arc-shaped bottom, and the bottom of the mixing cylinder (5) is a conical bucket bottom.

7. The small-water-quantity multi-cylinder circulating agglomerating fluidized bed water treatment device according to claim 1, wherein the tank body (4) is made of steel materials.

8. The small water volume multi-cylinder circulating agglomeration granulation fluid bed water treatment apparatus as claimed in claim 1, wherein the tank body (4) is mounted on a base frame (27).

9. The small-water-quantity multi-cylinder circulating agglomeration fluidized bed water treatment equipment as claimed in claim 1, wherein a sludge discharge pipe (28) communicated with a sludge concentration zone (7) in the tank body (4) is arranged on the outer wall of the tank body (4).