CN206168010U - Active sand filter - Google Patents

Abstract

The utility model discloses an active sand filter, which comprises a filter support, a filter body is arranged on the filter support, the filter body includes a shell, and at least two symmetrical hanging The upper part of the shell is provided with a dirty water outlet, raw water inlet and filtrate outlet, the bottom of the shell is provided with a filter sand outlet, and the center of the inside of the shell is provided with a dirty sand lift pipe, and the lower end of the dirty sand lift pipe is connected to an air lift pump. There are sand washers on both sides of the top of the dirty sand riser, and a water collector at the upper end of the dirty sand riser. The upper end of the water collector is provided with an anti-splash cap connected to the water collector, and the water collector is connected to the dirty water outlet; The outer periphery of the dirty sand riser and the inside of the shell are provided with a water distributor connected to the raw water inlet, and the outer periphery of the dirty sand riser at the lower end of the water distributor is provided with a filter sand guiding device; the dirty sand riser is composed of From inside to outside are corundum ceramics, transition layer and steel. The utility model has the advantages of simple structure, small occupied area and good filtering effect.

Description

An active sand filter

technical field

The utility model belongs to the technical field of water treatment equipment, in particular to an active sand filter.

Background technique

High-efficiency active sand filter is a continuous operation treatment equipment integrating flocculation, clarification, filtration and biological treatment functions. It is widely used in the fields of drinking water, industrial water, sewage advanced treatment and reclaimed water reuse treatment. The active sand filter (also known as the continuous flow sand filter) adopts the principle of upflow fluidized bed filtration and a single homogeneous filter material. The filtration and sand washing are carried out at the same time. It can run continuously and automatically for 24 hours without stopping for backwashing, and it can lift sand skillfully. And the sand washing structure replaces the traditional high-power backwashing system, with extremely low energy consumption, no maintenance, easy management, and unattended operation. However, the existing filters have a single structure and are difficult to meet the needs of actual use.

Utility model content

The purpose of the utility model is to provide an active sand filter.

In order to achieve the above object, the utility model adopts the following technical solutions:

An active sand filter, comprising a filter support, a filter body is provided on the filter support, the filter body includes a shell, at least two symmetrical hanging rings are arranged outside the shell, and the upper part of the shell There is a dirty water outlet, a raw water inlet and a filtrate outlet. The bottom of the shell is provided with a filter sand outlet. The center of the inside of the shell is provided with a dirty sand lift pipe. The lower end of the dirty sand lift pipe is connected to the air lift pump. There are sand washers on both sides of the top, a water collector on the upper end of the dirty sand riser, and a splash-proof cap connected to the water collector on the upper end of the water collector, and the water collector is connected to the dirty water outlet; The outer periphery and the interior of the shell are provided with a water distributor connected to the raw water inlet, and the outer periphery of the dirty sand riser at the lower end of the water distributor is provided with a filter sand guide device; Corundum ceramic, transition layer and steel.

Preferably, the dirty sand riser is a dirty sand riser made by the self-propagating high-temperature clutch synthesis method, which solves the problem that the dirty sand riser in the active sand filter is made of glass steel pipes, and the joints must be pasted by hand, and the manufacturing process is complicated. At the same time, it solves the unbearable irritating taste of the resin during the production process, the dust during grinding and cutting is not good for the environment and the health of the workers, and the resin is flammable, which also poses a greater threat to safety; said Corundum ceramics are corundum ceramics obtained at a temperature above 2200° C.; the transition layer is a technology known to those skilled in the art, so details will not be repeated here.

The utility model adopts the ceramic composite tube and has the following advantages:

1. Good wear resistance. Since the inner lining of the ceramic composite pipe is corundum ceramic (a-AL ₂ O ₃ ), the Mohs hardness can reach 9.0, which is equivalent to above HRC90. Therefore, it has high wear resistance to the abrasive media transported in metallurgy, electric power, mining, coal and other industries. It has been confirmed by industrial operation that its wear life is ten times or even dozens of times that of hardened steel.

2. The running resistance is small. Because the inner surface of the ceramic composite pipe is smooth and never rusted, there is no convex helix on the inner surface of the seamless steel pipe. According to the test of inner surface roughness and clean water resistance characteristics by relevant testing units, the inner surface smoothness is better than any metal pipe, and the clear resistance coefficient is 0.0193, which is slightly lower than seamless pipes. Therefore, the tube has the characteristics of small running resistance and can reduce operating costs.

3. Anti-corrosion and anti-scaling, because the steel ceramic layer is (a-AL ₂ O ₃ ), which is neutral. Therefore, it has acid and alkali resistance and seawater corrosion resistance, and also has anti-scaling and other characteristics.

4. The ceramic composite tube is light in weight and affordable. It is 50% lighter than cast stone pipes with the same inner diameter; 20-30% lighter than wear-resistant alloy pipes, and has good wear resistance and corrosion resistance. Operating costs are reduced. According to the comparison between the project budget and the actual project of the relevant design institutes and construction units, the project cost of the pipe is equivalent to that of cast stone. Compared with the wear-resistant alloy pipe, the project cost is reduced by about 20%. At the same time, the installation and construction are convenient. Good welding performance. Therefore, welding, flange, quick coupling and other methods can be used, which is convenient for construction and installation, and can reduce installation costs.

Compared with the traditional technology, the utility model integrates flocculation, sedimentation and filtration treatment, simplifies the process of the traditional process, has a simple structure, and occupies a small area. There are no rotating parts during operation, low failure rate and low maintenance cost. It does not require flocculation tanks, clarification tanks and other facilities. The filter utilization rate is high, the one-time investment is low, and the filter material is cleaned in time to ensure stability and good filtering effect. .

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a sectional view of the dirty sand riser of the utility model.

detailed description

The active sand filter shown in Figure 1 includes a filter holder 1, the filter holder 1 is provided with a filter body 2, the filter body 2 includes a housing 3, and the outside of the housing 3 is provided with at least Two symmetrical hanging rings 4, dirty water outlet 5, raw water inlet 6 and filtrate outlet 7 are provided on the upper part of the housing 3, filter sand outlet 8 is provided at the bottom of the housing 3, and dirty sand lifting is provided at the inner center of the housing 3 Pipe 9, the lower end of the dirty sand riser pipe 9 is connected to the air lift pump 10, the top sides of the dirty sand riser pipe 9 are provided with sand washers 11, and the upper end of the dirty sand riser pipe 9 is provided with a water collector 12, and the water collector 12 The upper end is provided with a splash cap 18 connected to the water collector 12, and the water collector 12 is connected to the dirty water outlet 5; the outer circumference of the dirty sand riser 9 and the inside of the housing 3 are provided with a water distributor connected to the raw water inlet 6 13. The outer periphery of the dirty sand riser 9 at the lower end of the water distributor 13 is provided with a filter sand guide device 14; as shown in Figure 2, the dirty sand riser 9 is corundum from the inside to the outside. Ceramic15, transition layer16 and steel17. The dirty sand riser 9 is a dirty sand riser made by a self-propagating high temperature clutch synthesis method; the corundum ceramic 15 is a corundum ceramic obtained at a temperature above 2200°C.

When working, the raw water passes through the raw water inlet 6 and enters the water distributor 13 from top to bottom to evenly distribute water to the lower part of the filter body. The filter sand that sinks into the bottom of the shell 3 and retains pollutants gathers at the bottom of the shell under the action of the filter sand guiding device 14, and is discharged upward from the bottom of the dirty sand lift pipe 9 to the top by the air lift pump 10, washing The sand tank 11 cleans the filter sand that has retained pollutants. The polluted water is stored in the water collector 12 and discharged through the pipeline through the dirty water outlet 5. The function of the anti-splash cap 18 is to prevent water, air, and filter sand from splashing out. Keeping the environment clean makes the treatment of the utility model reach a more ideal state; when the filter sand needs to be changed, the filter sand outlet 8 can be opened for easy replacement; when the filter sand needs to be moved, the hanging ring 4 can be used to facilitate lifting and moving.

Claims (1)

1. An active sand filter, characterized in that it comprises a filter holder, the filter holder is provided with a filter body, the filter body includes a housing, and the outside of the housing is provided with at least two symmetrical Hanging ring, dirty water outlet, raw water inlet and filtrate outlet are provided on the upper part of the housing, filter sand outlet is provided at the bottom of the housing, a dirty sand riser is installed at the center of the inner part of the housing, and the lower end of the dirty sand riser is connected to the air lift pump , there are sand washers on both sides of the top of the dirty sand riser, and a water collector on the upper end of the dirty sand riser. The outer periphery of the dirty sand riser and the inside of the housing are provided with a water distributor connected to the raw water inlet, and the outer periphery of the dirty sand riser at the lower end of the water distributor is provided with a filter sand guiding device; From inside to outside are corundum ceramics, transition layer and steel.