CN108654155A - A kind of active sand filter - Google Patents

Abstract

The present invention relates to a kind of active sand filters, it is characterised in that：Including the filter sand cleaning device (1) set gradually from inside to outside,Internal layer sand filtration component (2),Outer layer sand filtration component (3),Outer box assembly (4),The filtering sand chamber (5) for containing filter sand is equipped between internal layer sand filtration component (2) and outer layer sand filtration component (3),The water-purifying cavity (6) for containing water up to standard is equipped between outer layer sand filtration component (3) and outer box assembly (4),The water inlet pipe (7) for introducing sewage is connected on filter sand cleaning device (1),The outlet pipe (8) for the water purification in water-purifying cavity (6) to be discharged is equipped on outer box assembly (4),Outer layer sand filtration component (3) is arranged along the peripheral sidewall of filtering sand chamber (5),Multiple filter hole (31) for water purification outflow are equipped on outer layer sand filtration component (3),The active sand filter floor space is small,It is at low cost,Resource is fully used.

Description

An active sand filter

【Technical field】

The invention relates to an active sand filter.

【Background technique】

Active sand filtration is a continuous filtration technology for water treatment, which belongs to fluidized bed filtration, and sand is washed while filtering. Activated sand filtration technology occupies an increasingly important position in the advanced treatment process of municipal and industrial water and sewage due to its low one-time investment cost, no need for backwashing system operation and low maintenance cost.

In the existing active sand filter, the filtered water that meets the standard flows out from the top of the filter. This method has low filtration efficiency, large floor area, high cost, and inefficient use of resources.

Due to the above-mentioned problems, it is necessary to propose a solution, and the present invention is made under such a background.

【Content of invention】

The technical problem to be solved by the present invention is to provide an active sand filter for the deficiencies in the above-mentioned prior art. The active sand filter has a unique outer sand filter assembly, and the treated purified water is filtered The outflow around the components greatly improves the efficiency of sewage purification compared with traditional technologies, with a small footprint, low cost, and full use of resources.

To achieve the above object, the present invention adopts the following technical solutions:

An active sand filter, comprising a filter sand cleaning device 1, an inner layer sand filter assembly 2, an outer layer sand filter assembly 3, and an outer box assembly 4 arranged sequentially from the inside to the outside, the inner layer sand filter assembly 2 and the outer box assembly A filter sand chamber 5 for holding filter sand is provided between the outer sand filter assemblies 3 , and a water purification chamber for containing standard water is provided between the outer sand filter assembly 3 and the outer box assembly 4 6. The filter sand cleaning device 1 is connected with a water inlet pipe 7 for introducing sewage, and the outer box assembly 4 is provided with a water outlet pipe 8 for discharging the clean water in the clean water chamber 6, The outer layer sand filter assembly 3 is arranged along the peripheral side wall of the filter sand chamber 5 , and a plurality of filter holes 31 for clean water to flow out are arranged on the outer layer sand filter assembly 3 .

As mentioned above, the inner layer sand filter assembly 2 includes a plurality of sand retaining sheets 21 with a V-shaped cross section. The plurality of sand retaining sheets 21 are stacked up and down. Flow into the water flow channel 22 of the filter sand cavity 5 .

The size range of the distance L between the upper and lower sand blocking sheets 21 is: 40mm≦L≦60mm.

A top separation device 9 is provided on the top of the filter sand cleaning device 1 as described above, and an active sand backwash assembly 10 communicated with the filter sand cleaning device 1 is arranged in the top separation device 9. The washing component 10 is provided with a backwash drainage pipe 101 for discharging impurities such as suspended solids.

A lifting device 11 for lifting the sand-water mixture at the lower part of the filter sand chamber 5 to promote circulation is provided below the filter sand cleaning device 1 as described above.

A stirring device 12 is provided on the top separating device 9 as described above, and the stirring device 12 includes a drive motor 121 located at the top of the top separating device 9 and a motor that extends into the active sand backwash assembly 10 and the filter sand. The stirring shaft 122 in the cavity of the cleaning device 1 is cleaned.

A spiral connector 13 is provided between the active sand backwash assembly 10 and the filter sand cleaning device 1 as described above, and a spiral connector 13 is provided in the spiral connector 13 for impurities such as suspended solids to flow into the active sand backwash. The spiral pipeline 131 in the washing assembly 10.

As mentioned above, the lower part of the filter sand chamber 5 is in the shape of an inverted cone.

The beneficial effects of the present invention are:

1. The present invention provides an active sand filter. The active sand filter has a unique outer sand filter assembly. The treated clean water flows out from the outer sand filter assembly, which is greatly improved compared with the traditional technology. Improve the efficiency of sewage purification, occupy a small area, low cost, and fully utilize resources.

2. The present invention provides an active sand filter. The active sand filter has a unique inner layer sand filter assembly. The inner layer sand filter assembly includes a plurality of sand retaining pieces with a V-shaped cross section. The sand retaining pieces are On the one hand, it can ensure that the sewage smoothly enters the filter sand chamber for cleaning; on the other hand, it can prevent the filter sand in the filter sand chamber from flowing back into the filter sand cleaning device, and prevent the filter sand from blocking the filter sand cleaning device.

【Description of drawings】

Fig. 1 is a schematic cross-sectional view of the present invention.

Figure 2 is a front view of the present invention.

Fig. 3 is a cross-sectional view of A-A in Fig. 2 .

Fig. 4 is an enlarged view of part B in Fig. 3 .

Fig. 5 is an enlarged view of part C in Fig. 3 .

【Detailed ways】

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 5, an active sand filter includes a filter sand cleaning device 1, an inner layer sand filter assembly 2, an outer layer sand filter assembly 3, and an outer box assembly 4 arranged sequentially from the inside to the outside. Between the inner layer sand filter assembly 2 and the outer layer sand filter assembly 3, a filter sand chamber 5 for containing filter sand is provided, and between the outer layer sand filter assembly 3 and the outer box assembly 4 is provided There is a water purification chamber 6 for containing standard water, a water inlet pipe 7 for introducing sewage is connected to the filter sand cleaning device 1, and a water inlet pipe 7 for introducing sewage into the water purification chamber 6 is provided on the outer box assembly 4. The outlet pipe 8 for the clean water to discharge, the outer layer sand filter assembly 3 is arranged along the peripheral side wall of the filter sand chamber 5, and a plurality of outlets for the clean water to flow out are arranged on the outer layer sand filter assembly 3 Filter hole 31, the present invention provides an active sand filter, the active sand filter has a unique outer sand filter assembly, the treated clean water flows out from the outer sand filter assembly, compared to the traditional The technology greatly improves the efficiency of sewage purification, with a small footprint, low cost, and full use of resources.

As shown in Fig. 1, Fig. 3 and Fig. 4, in this embodiment, the inner layer sand filter assembly 2 includes a plurality of sand retaining sheets 21 with a V-shaped cross section, and the plurality of sand retaining sheets 21 are stacked up and down. Set, there is a water flow channel 22 for sewage to flow into the filter sand chamber 5 between the upper and lower two sand retaining sheets 21. The present invention provides an active sand filter, which has a unique inner layer of sand Filter assembly, the inner layer sand filter assembly contains a number of sand retaining pieces with a V-shaped cross-section. The filter sand flows back into the filter sand cleaning device to prevent the filter sand from clogging the filter sand cleaning device.

As shown in Fig. 1, Fig. 3 and Fig. 4, in this embodiment, the size range of the distance L between the upper and lower two sand-blocking sheets 21 is: 40mm≦L≦60mm, preferably 50mm, the sand-blocking On the one hand, the sheet can ensure that the sewage enters the filter sand chamber smoothly for cleaning, and on the other hand, it can prevent the filter sand in the filter sand chamber from flowing back into the filter sand cleaning device, and prevent the filter sand from blocking the filter sand cleaning device.

As shown in Figures 1 and 3, in this embodiment, a top separation device 9 is provided on the top of the filter sand cleaning device 1, and a The active sand backwash assembly 10 is equipped with a backwash drainage pipe 101 for discharging impurities such as suspended solids.

As shown in Fig. 1 and Fig. 3, in this embodiment, a lifting device 11 for lifting the sand-water mixture at the lower part of the sand filtering chamber 5 to promote circulation is provided under the sand filtering device 1 in this embodiment.

As shown in Fig. 1 and Fig. 3, in this embodiment, a stirring device 12 is provided on the top separating device 9, and the stirring device 12 includes a drive motor 121 and an extension provided at the top of the top separating device 9. The stirring shaft 122 in the cavity of the active sand backwashing assembly 10 and the filter sand cleaning device 1 can prevent the filter sand from clogging the filter sand cleaning device 1 and prevent impurities such as suspended solids from blocking the active sand backwashing assembly. 10.

As shown in Fig. 1, Fig. 3 and Fig. 5, in this embodiment, a helical connector 13 is provided between the active sand backwash assembly 10 and the filter sand cleaning device 1, and a helical connector 13 is provided between the helical The connector 13 is provided with a spiral pipe 131 for impurities such as suspended matter to flow into the active sand backwash assembly 10. On the one hand, the spiral pipe 131 facilitates the flow of impurities such as suspended matter into the active sand backwash assembly 10. On the other hand, it can prevent the filter sand from entering the active sand backwashing assembly 10 .

As shown in Figures 1 and 3, in this embodiment, the lower part of the filter sand chamber 5 is in an inverted cone shape, which facilitates the accumulation and circulation of filter sand in the lower part of the filter sand chamber 5, improving purification efficiency.

The activated sand filter is based on the principle of reverse flow. The raw water to be treated enters the filter through the water inlet pipe and the water distributor at the bottom of the filter. out through the overflow. The active sand filtration system is a high-efficiency filtration treatment process integrating coagulation, clarification and filtration, and is composed of multiple active sand filter units. It does not need to stop and backwash; it adopts single-stage filter material, no gradation is required, and there is no problem of uneven hydraulic distribution and primary filtrate; it does not need backwash pumps and electric and pneumatic valves for switching between shutdowns; no need for separate coagulation and clarification Pool, without coagulation, clarification mechanical equipment. Therefore, the active sand filtration system has a more compact footprint and is more economical to operate. Raw water enters the inside of the filter through the water inlet pipe, and is evenly distributed by the water distributor, and then flows upwards to the filter material layer and then discharged. During this process, the raw water is filtered, and the pollutant content in the water decreases; at the same time, the pollutant content in the quartz sand filter material increases, and the pollutant content of the lower filter material layer is higher than that of the upper filter material. The air lift pump located in the center of the filter lifts the bottom quartz sand filter material to the sand washer on the top of the filter for cleaning under the action of the air compressor. After the sand is cleaned, it returns to the filter bed, and at the same time, the pollutants produced by the cleaning are discharged. Since the quartz sand filter material is in a top-to-bottom movement state in the filter, it agitates the raw water, so the agitation and flocculation can be completed in the filter. The filter material in the filter is cleaned in time and can withstand high concentration of pollutants in the water. The special internal structure and its own characteristics of the active sand filter make coagulation, clarification and filtration all completed in the same pool. The active sand filtration system consists of concrete tanks with corresponding structures, conical sand filter guides, internal filter units, water inlet pipes, filtrate outlet pipes, flushing water outlet pipes, elastic connections between internal filter units and corresponding pipes, air compressors and control system etc. The internal filter unit includes water inlet and outlet pipes, water flow distributor, sand washing device, flushing water outlet pipe and air lift pump casing, etc. Both the water inlet and outlet pipes and the rinse water outlet pipe are located on the upper part of the filter unit. The polluted filter material at the bottom of the filter is lifted to the sand washer on the top of the filter by the air lift pump, the pollutants are separated from the active sand by turbulent flow, the impurities are discharged through the cleaning water outlet, and the clean sand is returned to the sand by its own weight. bed to achieve continuous filtration.

Claims (8)

1. An active sand filter, characterized in that: it includes a filter sand cleaning device (1), an inner layer sand filter assembly (2), an outer layer sand filter assembly (3), and an outer box assembly arranged sequentially from the inside to the outside (4), between the inner layer sand filter assembly (2) and the outer layer sand filter assembly (3), a filter sand chamber (5) for holding filter sand is provided, and the outer layer sand filter assembly (3) A clean water cavity (6) for containing standard water is provided between the outer box assembly (4), and a water inlet pipe (7) for introducing sewage is connected to the filter sand cleaning device (1) ), the outer box assembly (4) is provided with an outlet pipe (8) for discharging the clean water in the clean water chamber (6), and the outer sand filter assembly (3) is along the The peripheral side wall of the filter sand chamber (5) is arranged, and a plurality of filter holes (31) for the outflow of clean water are arranged on the outer sand filter assembly (3). 2. The active sand filter according to claim 1, characterized in that: the inner layer sand filter assembly (2) comprises a plurality of sand retaining sheets (21) with a V-shaped cross section, and a plurality of sand retaining sheets (21) The sheets (21) are stacked up and down, and there is a water flow channel (22) between the upper and lower sand-blocking sheets (21) for sewage to flow into the filter sand cavity (5). 3. The active sand filter according to claim 2, characterized in that: the size range of the distance L between the upper and lower two sand retaining sheets (21) is: 40mm≦L≦60mm. 4. The active sand filter according to claim 1, characterized in that: a top separation device (9) is provided on the top of the filter sand cleaning device (1), and a top separation device (9) is provided in the top separation device (9). An active sand backwash assembly (10) connected to the filter sand cleaning device (1), on which a backwash drainage pipe (101) for discharging impurities such as suspended solids is provided on the active sand backwash assembly (10) . 5. The active sand filter according to claim 4, characterized in that: under the filter sand cleaning device (1), there is a device for lifting the sand-water mixture in the lower part of the filter sand cavity (5) upwards to promote circulation. Mobile lifting device (11). 6. The active sand filter according to claim 4, characterized in that: a stirring device (12) is provided on the top separating device (9), and the stirring device (12) includes a The driving motor (121) at the top of the device (9) and the stirring shaft (122) extending into the cavity of the active sand backwashing assembly (10) and the filter sand cleaning device (1). 7. The active sand filter according to claim 6, characterized in that: a spiral connector (13) is provided between the active sand backwash assembly (10) and the filter sand cleaning device (1) , A spiral pipe (131) for impurities such as suspended solids to flow into the active sand backwash assembly (10) is provided in the spiral connector (13). 8. The active sand filter according to claim 1, characterized in that: the lower part of the filter sand chamber (5) is in an inverted cone shape.