KR200292147Y1 - Filtrate washing device of continuous washing filter - Google Patents

Abstract

The present invention relates to a filter medium cleaning device of the continuous washing filter, the filter medium cleaning chamber 30 is installed on the upper side of the filter tank 10 filled with the filter medium 20 therein, and the filter medium cleaning chamber 30 Including air bubble supply means for supplying air bubbles to the lower part, it is possible to easily remove the contaminants adsorbed on the media and to raise the raw water to increase the floating time of the contaminants to remove a large amount of contaminants in a short time. Increasing the cleaning efficiency is to improve the water quality of the treated water.

Description

Filtrate washing device of continuous washing filter

The present invention relates to a continuous washing filter for continuously washing and supplying sand or filter medium used as a filter medium.

The filter is a device that removes contaminants in water, and there are various fields of application such as purified water, process water, raw material purification and recovery, as well as treatment of contaminated water such as sewage, wastewater, and sewage.

Normal pressurized filters should be back washed after a certain time due to contaminants attached to the media and the water treatment should be stopped during back washing.

In order to eliminate such inconvenience, the use of a continuous washing filter that can continuously proceed to the cleaning of the filter medium during operation has been increased.

The continuous washing filter has a built-in type and an external type according to the filter feeding method, and is divided into an upflow type and a downflow type according to the filtration direction, and has a filter washing chamber 130 for continuous washing of the filter medium.

As shown in Figure 1, the conventional continuous washing filter is filled with the filter medium 120 therein and the filter tank 110 receives the raw water, and the filter medium for purifying while crossing the filter medium in the reverse direction with the wash water The cleaning chamber 130 and the filter medium transport pipe 114 for circulating and supplying the filter medium 120 into the filter medium cleaning chamber 130.

The conventional continuous washing filter supplies the filter medium 110 at the lower portion of the filtration tank 110 to the filter medium 110 through the filter medium 110 to filter the washing water while the filter medium 120 moves downward by its own weight. It moves upward to the inside of the cleaning chamber 130 to wash the filter medium and to separate the waste water discharged.

Here, the conventional continuous washing filter is washing the filter medium by the filter medium washing chamber 130, but the device has a large specific gravity in the process of contacting the filter medium and the wash water is lowered, the pollutants with a small specific gravity to the flow rate of the raw water It is lifted to the top by the removal and requires a lot of washing water.

That is, the conventional filter medium cleaning chamber 130 is to remove the contaminants by the washing water while the filter medium is passed, when the flow rate of the wash water is low, because the contaminant can be lowered with the filter medium to maintain the flow rate quickly In order to speed up the flow rate, the flow rate of the washing water should be increased or the cross-sectional area of the filter medium cleaning chamber 130 having a corrugated passage should be small. However, in the former case, the washing water is consumed a lot, and in the latter case, the passage may be blocked. There was a problem.

Washing water used for backwashing is usually about 10-15% of the amount of filtered water, and the washing wastewater has to go through the whole process of wastewater treatment again, which is a direct cause of the increase in treatment cost.

Therefore, the present invention has been devised to solve the above-mentioned problems, and it is possible to increase the cleaning efficiency of the contaminants attached to the media by using pressurized water or air and to promote the increase of the contaminants, thereby increasing the cleaning efficiency. It is an object to provide a wash filter.

The present invention for achieving the object of the above, the filter medium is installed on the upper side of the filter tank filled with the filter medium, and the raw water in the filter tank is converted into pressurized water and supplied to the lower portion of the filter medium chamber The pressurized water supply pipe and the upper portion of the pressurized water supply pipe is provided, and includes a distribution pipe for dispersing the pressurized water and supplying it to the filter medium cleaning chamber.

Therefore, it is possible to improve the water quality of the treated water by easily removing the contaminants attached to the filter medium to increase the washing action and to raise the removed contaminants to increase the cleaning efficiency of the filter medium.

1 is a side cross-sectional view showing a continuous washing filter according to the prior art,

Figure 2 is a side cross-sectional view showing a continuous washing filter with a first embodiment of the present invention,

Figure 3 is a side cross-sectional view showing a filter medium cleaning device of the first embodiment of the present invention,

4 is a perspective view showing a distribution pipe of a first embodiment of the present invention;

Figure 5 is a side cross-sectional view showing a continuous washing filter with a second embodiment of the present invention,

Figure 6 is a side cross-sectional view showing a filter with a third embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: filtration tank 11: raw water inlet pipe

12: treated water discharge pipe 13: washing waste water discharge pipe

14: media transfer 20: media

30: media cleaning chamber 40: distribution pipe

50: pressurized water supply pipe 60: pressurized pump

70: diffuser

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a side cross-sectional view showing a continuous washing filter with a first embodiment of the present invention, Figure 3 is a side cross-sectional view showing a filter medium of the first embodiment of the present invention, Figure 4 is a first view of the present invention It is a perspective view which shows the distribution pipe of an Example.

The filter medium cleaning device of the continuous washing filter according to the present embodiment, the filter medium cleaning chamber 30 is installed on the upper side of the filter tank 10 filled with the filter medium 20 therein, and the inside of the filter tank (10) Air supply valve 65 for injecting air into the filtered water and pressurized water to pressurize the water injected to produce pressurized water and to supply the lower portion of the filter medium cleaning chamber 30 through the pressurized water supply pipe 50. A pump 60 and a distribution pipe 40 which is provided on the pressurized water supply pipe 50 to distribute the pressurized water to the filter medium cleaning chamber 30.

The filtration tank 10 is filled with the filter medium 20 therein, the raw water inlet pipe 11 is connected to one side, the treatment water discharge pipe 12 is connected to the upper side, the washing waste water discharge pipe 13 is on the upper side It is connected.

The raw water inlet pipe 11 is a passage through which raw water to be purified from the outside is introduced, and the treated water discharge pipe 12 passes through the filter medium 20 inside the filtration tank 10 to purify the treated water outside. The washing waste water discharge pipe 13 is a passage through which the washing waste water passing through the filter medium cleaning chamber 30 is discharged to the outside.

Here, the raw water refers to the water before purification, the treated water refers to the purified water through the filter medium 20, the washing water to wash the filter medium 20 passing through the filter medium cleaning chamber 30 of the treated water In order to refer to the water introduced into the filter medium washing chamber 30, the washing waste water refers to the water contaminated through the filter medium washing chamber (30).

The media transfer pipe 14 is vertically installed in the center of the filtration tank 10 to transfer the media 20 in the filtration tank 10 to the upper portion of the media cleaning chamber 30.

The filter medium cleaning chamber 30 is a corrugated passage having an inner wall, which is installed above the filter tank 10, passes raw water in the filter tank 10 upwardly, and filters the filter medium transport pipe 14. As the filtering medium 20 rises down, the raw water is filtered while passing downward.

The contaminated washing wastewater passing upward through the filter medium washing chamber 30 overflows and is discharged to the outside through the washing wastewater discharge pipe 13.

Raw water of the filtration tank 10 is converted into pressurized water by the air supply valve 65 and the pressure pump 60 is supplied to the distribution pipe 40 through the pressurized water supply pipe (50).

The air supply valve 65 supplies air to the raw water supplied from the filtration tank 10 to the pressure pump 60, and the raw water containing air is pumped by the pressure pump 60 to generate fine bubbles to pressurize the air. Will be converted to a number.

Pressurized water pressurized by the pressure pump 60 is uniformly sprayed on the lower front surface of the filter medium cleaning chamber 30 through the distribution pipe 40 to remove and remove contaminants attached to the filter medium 20 by stirring. Contaminants rise quickly.

Accordingly, the washing of the filter and the rise of contaminants in the filter cleaning chamber 30 are facilitated so that the contaminants are re-introduced into the filter tank 10 together with the filter 20 and are not mixed with the treated water. The water quality can be improved, and the amount of washing water used can be reduced.

The contaminants are suddenly floated by the buoyancy of the air bubbles attached to the surface and floats on the water surface. When the water level rises as the pollutants floating on the water gradually increase, the pollutants are discharged to the outside through the washing wastewater discharge pipe 13.

At this time, the discharged washing waste water is mixed with pressurized water and contaminants to be discharged in the form of high concentration liquid sludge, and the amount of overflowing washing waste water is overrun by the difference between the washing waste water discharge pipe 13 and the treated water outflow surface. Since the amount of the flowing waste water is changed, it is possible to control the amount of discharged.

Figure 5 is a side cross-sectional view showing a continuous washing filter with a second embodiment of the present invention.

The filter medium cleaning device of the continuous washing filter according to the present embodiment, the filter medium cleaning chamber 30 is installed on the upper side of the filter tank 10 filled with the filter medium 20 therein, and the filter medium cleaning chamber 30 And a diffuser 70 for injecting fine air downward, and an air pump (not shown) for supplying air to the diffuser 70.

The diffuser 70 is installed in the lower portion of the filter cleaning chamber 30, and generates bubbles of a fine size by the voids to pass upwardly into the filter cleaning chamber 30.

The diffuser 70 is uniformly dispersed in the pressurized water to collide with the falling media, the fine air is uniformly sprayed by the diffuser 70 to the lower front surface of the filter medium cleaning chamber 30 a strong stirring By acting to promote the effect and injury is to remove the contaminants attached to the filter medium 20 to rise.

Figure 6 is a side cross-sectional view showing a filter with a third embodiment of the present invention.

As shown in Figure 6, the filter of the present embodiment is the filter medium transport pipe (14 ') is provided on the outside of the filtration tank 10, the filter medium (10) inside the filtration tank 10 to the outside of the filtration tank (10) It is fed upward through the supply to the inside of the filter medium cleaning chamber (30).

As described above, according to the filter medium of the continuous washing filter according to the present invention, it is easy to remove the contaminants attached to the filter medium to increase the washing action, and to boost the water quality of the treated water by sharply removing the contaminants attached to the filter medium. And it has the effect of reducing the amount of wash water used.

Claims (3)

It is provided with a filtration tank 10 filled with the filter medium 20 therein, and the raw water introduced through the raw water inlet pipe 11 into the filter tank 10 to pass through the filter medium 20 to purify the raw water. In the continuous washing filter, having a filter cleaning chamber 30, the filter medium for cleaning the filter medium while passing the washing water and the filter medium 20 in the filter cleaning chamber 30 in the reverse direction, And a bubble supply means for passing air bubbles upwards into the filter cleaning chamber (30). According to claim 1, The bubble supply means, Air supply valve for injecting air into the filtered water in the filtration tank (10) (65); Pressurized pump 60 for producing pressurized water by pressurizing the water injected with air and supplying the pressurized water to the lower portion of the filter medium cleaning chamber 30 through the pressurized water supply pipe 50; Filtering device of the continuous washing filter characterized in that the; provided in the upper portion of the pressurized water supply pipe 50 is distributed pipe 40 for distributing the pressurized water to supply to the filter medium cleaning chamber (30). According to claim 1, wherein the bubble supply means, The diffuser (70) for injecting air to the lower portion of the filter medium cleaning chamber (30); Air filter for supplying air to the diffuser (70); Media cleaning device of the continuous-type filter characterized in that the.