CN209564650U - A High Efficiency Vertical Flow Sedimentation Tank Suitable for Fine Granular Sludge - Google Patents

Abstract

The utility model provides a kind of high efficiency vertical sedimentation tank suitable for fine granule, including pond body and it is mounted on the intracorporal central tube in pond, reflecting plate, strainer and leads mud mud guard, it central tube, reflecting plate, strainer and leads mud mud guard pond body is divided into inhalant region, cement Disengagement zone, gathering ground, the area Dao Ni and mud collection area, inhalant region is also equipped with decompression reduction of speed device, water inlet pipe and spoiler, gathering ground is also equipped with catch basin, outlet pipe and overflow weir, and mud collection area is also equipped with sludge pipe.The high efficiency vertical sedimentation tank suitable for fine granule of the utility model reduces water inlet flow velocity by decompression reduction of speed device, it is set preferably to flocculate, decompression reduction of speed device upper end overflow can carry out water distribution uniformity, spoiler can increase flow-disturbing and slow down water impact, conducive to the further flocculation sedimentation of fine granule, sludge siltation pool wall can be prevented and prevent impurity from floating by leading mud mud guard, and strainer can stop the flocculated suspension object driven by water flow, further decrease delivery turbidity.

Description

A High Efficiency Vertical Flow Sedimentation Tank Suitable for Fine Granular Sludge

technical field

The utility model belongs to the technical field of sewage treatment equipment and relates to a sedimentation tank, in particular to a high-efficiency vertical flow sedimentation tank suitable for fine particle sludge.

Background technique

With the development of society, water pollution is becoming more and more serious, but people's quality of life has higher and higher requirements for water quality. The sedimentation method can remove sand particles, chemical sediments, flocs formed by coagulation and sludge after biological treatment in water. The precipitation process is simple and easy, and the separation effect is good. It is an important process of water treatment and is widely used. It is almost an indispensable unit in the water treatment process. There are two types of sedimentation: natural sedimentation and flocculation sedimentation. The existing sedimentation tanks are mainly divided into three types: advection sedimentation tanks, vertical flow sedimentation tanks and radial flow sedimentation tanks.

The vertical flow sedimentation tank refers to the vertical flow of sewage in the pool. The water enters the pool from top to bottom through the water inlet pipe set in the center of the pool. An umbrella-shaped baffle is set in the tube to make the waste water evenly distributed in the pool and then slowly flow along the entire cross-section. As it rises, the suspended matter enters the conical sludge hopper at the bottom of the pool due to gravity, and the clarified water flows out from the surrounding overflow weir around the pool. A baffle or a scum tank is installed in front of the weir to intercept the scum and ensure the quality of the effluent. On one side of the pool, a mud discharge pipe is set against the wall of the pool to discharge the mud regularly by hydrostatic pressure. The advantage of the vertical flow sedimentation tank is that it occupies a small area and is often used in sewage treatment plants with a water volume of less than 20,000m ³ /d. The tank body of the vertical flow sedimentation tank is generally cylindrical or square.

Although the vertical flow sedimentation tank has the characteristics of small footprint and easy operation, there are still the following problems: due to the relatively large height-to-diameter ratio of the sedimentation tank, the settled fine-grained sludge is easy to disperse and accumulate in the conical sludge hopper The sides of the sludge hopper form a settlement layer with high surroundings and low middle. It is difficult for the remaining sludge to be discharged from the sludge outlet at the bottom in time, and it is easy to accumulate on the side of the sludge hopper to form a dead zone. And there may be local uneven water distribution, which is easy to cause short flow or even dead angle in the sedimentation tank, which affects the removal effect of fine-grained sludge suspended impurities in the sedimentation tank; the coagulation process usually requires stirring, which consumes a lot of electric energy, and it is easy to dispose of the sewage The mud is stirred up, which affects the upper clear water; the fine-grained sludge is easy to flow out with the water, and the sedimentation effect is not ideal.

Contents of the invention

Aiming at the deficiencies in the prior art, the purpose of this utility model is to provide a high-efficiency vertical flow sedimentation tank suitable for fine particle sludge to solve the lack of high-efficiency vertical flow sedimentation tank suitable for fine particle sludge in the prior art. Flow sedimentation tank, the existing vertical flow sedimentation tank is easy to form a dead zone, the problem of low fine particle sludge removal efficiency caused by fine particle sludge flowing out with water.

In order to solve the above-mentioned technical problems, the application adopts the following technical solutions to achieve:

A high-efficiency vertical flow sedimentation tank suitable for fine particle sludge, including a tank body, and also includes a central cylinder installed in the tank body, a reflector, a filter screen and a mud guide fender;

The central tube, reflector, filter screen and mud guide fender divide the tank body into a water inlet area, a cement separation area, a water collection area, a mud guide area and a mud collection area. The area includes the cavity in the side wall of the central cylinder and the top plate, the cement separation area includes the cavity in the pool body between the reflector and the filter screen, and the water collection area includes the cavity between the filter screen and the top opening of the pool body The cavity in the pool body, the mud guide area includes the cavity in the pool body between the reflector and the mud guide fender, and the mud collection area includes the cavity between the mud guide fender and the bottom of the pool body cavities in the pool body;

The decompression decelerator, water inlet pipe and spoiler are installed in the water inlet area, the decompression decelerator and spoiler are installed in the central cylinder, and the water inlet pipe is installed in the The bottom of the decompression decelerator is connected to the water inlet outside the pool;

In the water collection area, a water collection tank is arranged along the inner wall of the pool, and an overflow weir is installed on the top of the inner wall of the water collection tank, and an outlet water storage tank connected to the outside of the pool is also installed in the water collection tank. the outlet pipe;

The mud collection area is installed with a mud discharge pipe passing through the pool body to communicate with an external sludge storage tank.

The utility model also has the following technical characteristics:

Specifically, a dosing pipe connected to an external auxiliary agent storage tank is also installed in the water inlet area, and the dosing pipe leads into the decompression decelerator.

Specifically, the spoiler is a plurality of annular plates fixed at intervals on the inner wall of the central cylinder or the outer wall of the decompression decelerator, the decompression decelerator, the inner wall of the central cylinder and the outer wall of the decompression decelerator. spoiler.

Specifically, the lower part of the decompression decelerator is a cone, and the upper part is a cylinder with an open top.

Specifically, the radius ratio of the decompression decelerator to the central cylinder is 2:3, and the cone base angle α of the lower cone of the decompression decelerator is 60-65°.

Specifically, the mud-guiding fender is a plurality of fan-shaped plates hinged to the pool body, which are spliced obliquely to form a conical mud-guiding cylinder.

Specifically, the mud guide fender is hinged to the pool body and can be driven by a hydraulic rod to swing around the hinge point.

Compared with the prior art, the utility model has beneficial technical effects as follows:

(I) The high-efficiency vertical flow sedimentation tank suitable for fine particle sludge of the present utility model is provided with a decompression deceleration device. The lower end of the decompression deceleration device is funnel-shaped, that is, a cone, and the upper end is a cylinder of equal cross-section. Sewage enters from the lower end of the decompression decelerator. As the cross-sectional area of the flow increases, the flow rate will decrease. The medicine is added from the upper end and convects with the sewage, which can be well mixed and flocculated without stirring and power facilities. The upper end of the decompression decelerator is an equal section with a certain height, and the water flow overflows from the upper end of the decompression decelerator after flocculation, which can achieve the effect of uniform water distribution. The setting of the decompression deceleration device provides guarantee for the subsequent precipitation, increases the coagulation reaction, can increase the particle size, and at the same time reduces the water flow velocity by increasing the cross-flow section, so that the relationship between the rising speed of the water flow and the settling velocity of the particles The difference increases, reducing the settling time. Coagulation and sedimentation share one structure, which reduces floor space and saves costs;

(II) The high-efficiency vertical flow sedimentation tank suitable for fine particle sludge of the present utility model is equipped with a spoiler. If the water flow directly passes through the central cylinder and then rises through the reflection of the reflector, the flow rate will be too large, which is not conducive to sedimentation and separation. Therefore, setting staggered rectangular spoilers in the center tube is beneficial to add water flow path, increase turbulence, alleviate the impact of water flow, slow down the flow velocity, and at the same time facilitate the further flocculation and sedimentation of particles;

(Ⅲ) The high-efficiency vertical flow sedimentation tank suitable for fine particle sludge of the present utility model is also equipped with fan-shaped mud-guiding fenders in multiple groups, and the mud-guiding fenders are ring-shaped plates spliced by petal-shaped blocks. , can use hydraulic transmission to shrink and adjust the inclination angle of the mud guide fender. The mud guide fender is located above the sludge hopper, which can guide the sedimented suspended matter to the middle of the sludge hopper, so that it can accumulate to the middle of the sludge hopper faster and more stably, and relieve the sludge in the sludge due to the large height-to-diameter ratio of the tank body. The phenomenon of accumulation on the side of the sludge hopper avoids the accumulation of sludge on the side of the sludge hopper to form a dead zone. Simultaneously, because the inclination angle of the mud-guiding fender can be adjusted, it is difficult for sludge to deposit on the mud-guiding fender. And it can prevent the impurities in the water stirred during mud discharge from floating up again. Moreover, the guiding process is similar to flexible dumping, which can improve the settlement effect and further improve the water quality.

(Ⅳ) The high-efficiency vertical flow sedimentation tank suitable for fine particle sludge of the present utility model is also provided with multiple sets of filters on the inner wall of the tank to separate the water collection area and the cement separation area. will be filtered through the filter. The filter screen can block the flocculated suspended matter driven by the water flow, prevent the fine suspended matter from flowing into the effluent, affect the effluent water quality, and further reduce the turbidity of the effluent.

Description of drawings

Fig. 1 is a schematic view of the overall structure of the utility model;

Fig. 2 is the sectional structure schematic diagram of A-A plane of Fig. 1;

Fig. 3 is the sectional structure schematic diagram of B-B plane of Fig. 1;

The meaning of each label in the figure is: 1-pool body, 2-central tube, 3-reflector, 4-filter, 5-mud guide fender;

11-water intake area, 12-cement separation area, 13-water collection area, 14-mud guide area, 15-mud collection area;

111-decompression reducer, 112-inlet pipe, 113-spoiler, 114-dosing pipe;

131-sump, 132-overflow weir, 133-outlet pipe;

151 - mud discharge pipe.

Below in conjunction with embodiment the specific content of the present utility model is described in further detail.

Detailed ways

Comply with above-mentioned technical scheme, provide the specific embodiment of the present utility model below, it should be noted that the utility model is not limited to the following specific embodiment, all equivalent transformations done on the basis of the technical solution of the present application all fall into the utility model scope of protection. Below in conjunction with embodiment the utility model is described in further detail.

Example:

This embodiment provides a high-efficiency vertical flow sedimentation tank suitable for fine-grained sludge, as shown in Figures 1 to 3, including a tank body 1, a central cylinder 2 installed in the tank body 1, and a reflector 3. Filter screen 4 and mud guide fender 5;

The central cylinder 2, the reflection plate 3, the filter screen 4 and the mud guide fender 5 divide the pool body 1 into a water inlet area 11, a cement separation area 12, a water collection area 13, a mud guide area 14 and a mud collection area 15. The water area 11 includes the cavity in the side wall of the central cylinder 2 and the roof, the cement separation area 12 includes the cavity in the pool body 1 between the reflector 3 and the filter screen 4, and the water collection area 13 includes the filter screen 4 and the pool body 1 The cavity in the pool body 1 between the top openings, the mud guide area 14 includes the cavity in the pool body 1 between the reflector 3 and the mud guide fender 5, and the mud collection area 15 includes the mud guide fender 5 and the cavity in the pool body 1 between the bottom of the pool body 1;

The decompression deceleration device 111, water inlet pipe 112 and spoiler 113 are installed in the water inlet area 11, the decompression deceleration device 111 and the spoiler 113 are installed in the central cylinder 2, and the water inlet pipe 112 is installed in the decompression deceleration The bottom of the device 111 is connected to the water inlet source outside the pool body 1;

In the water collection area 13, a water collection tank 131 is arranged along the inner wall of the pool body 1, and an overflow weir 132 is installed on the top of the inner wall of the water collection tank 131. In the water collection tank 131, a water storage tank connected to the outside of the pool body 1 is also installed. The water outlet pipe 133;

The mud collection area 15 is equipped with a mud discharge pipe 151 passing through the tank body 1 and communicating with an external sludge storage tank.

As a specific solution of this embodiment, a dosing pipe 114 connected to an external auxiliary agent storage tank is also installed in the water inlet area 11 of this embodiment, and the dosing pipe 114 leads into the decompression deceleration device 111 .

As a specific solution of this embodiment, the spoiler 113 of this embodiment is a plurality of annular plates fixed at intervals on the inner wall of the central cylinder 2 or the outer wall of the decompression decelerator 111, the decompression decelerator 111, Central cylinder 2 inner cylinder wall and spoiler.

As a specific solution of this embodiment, the lower part of the decompression decelerator 111 of this embodiment is a cone, and the upper part is a cylinder with an open top.

As a more specific solution of this embodiment, the radius ratio between the decompression decelerator 111 and the central cylinder 2 of the present embodiment is 2:3, and the cone base angle α of the lower cone of the decompression decelerator 111 is 60-65°.

As a specific solution of this embodiment, the mud-guiding fender 5 of this embodiment is a plurality of fan-shaped plates hinged with the pool body 1 , which are spliced obliquely to form a conical mud-guiding cylinder.

As a specific solution of this embodiment, the mud guide fender 5 of this embodiment is hinged to the pool body 1 and can be driven by a hydraulic rod to swing around the hinge point.

The use of the high-efficiency vertical flow sedimentation tank suitable for fine particle sludge of the present utility model is carried out through the following steps:

Step 1: Pass the sewage containing fine particle sludge to be treated from the water inlet pipe 112, and pass the flocculant agent from the dosing pipe 114 at the same time;

Step 2: Adjust the flow rate of the water in the inlet pipe 112 and/or the flow rate of the flocculation agent in the dosing pipe 114 according to the turbidity of the outlet water, and control the mud guide and mud retaining through the hydraulic control device (commercially available control device can be used) at regular intervals The plate 5 swings several times, and the fine-grained sludge that is separated after flocculation and sedimentation and temporarily adheres to the mud guide fender 5 is shaken off to the sludge collection area 15, and the settled sludge in the sludge collection area 15 is to be accumulated to a certain amount. Finally and/or at a set time interval, the settled sludge is pumped out through the sludge discharge pipe 151 and subjected to subsequent treatment; at the same time, the effluent overflowing from the overflow weir 132 and collected in the sump 131 is discharged to the effluent through the outlet pipe 133. reservoir;

Step 3: Repeat the operation of Step 2, and regularly observe the adhesion of the flocculated sludge on the spoiler 113 and the filter screen 4, and clean or replace it as necessary.

Claims (7)

1. a kind of high efficiency vertical sedimentation tank suitable for fine granule, including pond body (1), which is characterized in that further include peace It central tube (2), reflecting plate (3), strainer (4) in pond body (1) and leads mud mud guard (5)；

It the central tube (2), reflecting plate (3), strainer (4) and leads mud mud guard (5) pond body (1) is divided into water Area (11), cement Disengagement zone (12), gathering ground (13), the area Dao Ni (14) and mud collection area (15), the inhalant region (11) include Cavity in central tube (2) side wall and top plate, the cement Disengagement zone (12) include between reflecting plate (3) and strainer (4) Cavity in pond body (1), the gathering ground (13) include in the pond body (1) between strainer (4) and pond body (1) top opening Cavity, the area Dao Ni (14) includes reflecting plate (3) and leads the cavity in pond body (1) between mud mud guard (5), described Mud collection area (15) includes the cavity in the pond body (1) led between mud mud guard (5) and pond body (1) bottom；

Decompression reduction of speed device (111), water inlet pipe (112) and spoiler (113) are installed, described subtracts in the inhalant region (11) Trimetaphan device (111) and spoiler (113) are installed in the central tube (2), and the water inlet pipe (112) is installed on described Decompression reduction of speed device (111) bottom and be connected to the water inlet water source of the pond body (1) outside；

It is provided with catch basin (131) in the gathering ground (13) along described pond body (1) inner wall, the catch basin (131) Inner ring groove wall top is equipped with overflow weir (132), and connection pond body (1) water outlet storage outside is also equipped in the catch basin (131) The outlet pipe (133) in pond；

The mud collection area (15) is equipped with the sludge pipe (151) that external sludge reservoir is connected to across the pond body (1).

2. as described in claim 1 be suitable for fine granule high efficiency vertical sedimentation tank, which is characterized in that it is described into The chemical feed pipe (114) for being connected to external auxiliary agent tank is also equipped in pool (11), the chemical feed pipe (114) is passed through described subtract In Trimetaphan device (111).

3. being suitable for the high efficiency vertical sedimentation tank of fine granule as described in claim 1, which is characterized in that described disturbs Flowing plate (113) is the Circular Plate that multiple intervals are fixed on central tube (2) inner wall or decompression reduction of speed device (111) outer wall, Decompression reduction of speed device (111), central tube (2) inside barrel and the spoiler.

4. being suitable for the high efficiency vertical sedimentation tank of fine granule as described in claim 1, which is characterized in that described subtracts Trimetaphan device (111) lower part is cone, and top is the cylindrical body of top end opening.

5. being suitable for the high efficiency vertical sedimentation tank of fine granule as claimed in claim 4, which is characterized in that described subtracts The radius ratio of Trimetaphan device (111) and central tube (2) is 2:3, the cone bottom of described decompression reduction of speed device (111) the lower cone body Angle α is 60~65 °.

6. being suitable for the high efficiency vertical sedimentation tank of fine granule as described in claim 1, which is characterized in that described leads Mud mud guard (5) is the multi-disc fanning strip hinged with the pond body (1), and inclination is spliced into cone and leads mud cylinder.

7. being suitable for the high efficiency vertical sedimentation tank of fine granule as claimed in claim 6, which is characterized in that described leads Mud mud guard (5) is hinged with the pond body (1) and can be driven by hydraulic stem around hinged spot wobble.