JPS5811382Y2 - Countercurrent sand washing equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a countercurrent type sand washing device for washing contaminated sand to which filth and impurities are attached or mixed.

The sand that settles in the sewage settling basin is contaminated with the filth in the sewage, and when this contaminated sand is stored or transported, there is a risk of dripping or dripping of the sewage, as well as foul odor pollution due to the decay of the filth. There is.

Therefore, it is necessary to wash the contaminated sand and separate the waste before disposing of it.

When washing contaminated sand, one method is to blow air into the cleaning tank and stir it with the cleaning solution to remove the dirt adhering to the contaminated sand. It tends to flow in the same direction as the washing water and flow out together with the washing water, and the washing efficiency is also poor.

This invention adopts a sand washing method using air blowing, and also allows contaminated sand to flow in the opposite direction to the flow of washing water.
That is, by adopting a countercurrent type in which the flow of the washing sand moves toward the flow of the washing water, a sand washing device is provided which prevents the washing sand from flowing out and has high cleaning efficiency.

Embodiments of the present invention will be described below based on the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a cleaning tank, and a cleaning water supply port 2 and a cleaning sand delivery device 4 using a screw conveyor 3 are provided at one end 1a of the cleaning tank 1.

Further, at the other end 1b, there is a washing water discharge port 5 and a contaminated sand supply port 6.
is provided.

And both side tank walls IC, ld extending between both ends 1a, lb
An aeration pipe 7 is provided on the tank bottom 1e along one side of the tank wall 1C, so that air is blown out.

In addition, a large number of baffle plates 8 are arranged along the tank wall 1d on the other side at appropriate intervals, and the lower part 8a of the baffle plate 8 is located closer to the cleaning water supply port than the upper part 8b. It is installed at an angle so that the

Also, the tank bottom 1f at the position where this baffle plate 8 is provided.
is inclined so that the sand slides toward the tank wall 1C side.

With the above-described structure, the cleaning water supplied from the cleaning water supply port 2 flows in the direction of the arrow A in the cleaning tank 1 to wash contaminated sand, passes through the sinkhole 9 together with dirt, and is discharged from the discharge port 5.

On the other hand, contaminated sand is supplied into the cleaning tank 1 from the contaminated sand supply chamber 6, and is blown up by the air blown up from the aeration pipe 7 at the tank bottom 1e, from the tank wall 1C side to the tank wall 1d, and onto the inclined surface of the baffle plate 8. descend.

At this time, since the baffle plate 8 is inclined toward the wash water supply port 2, the sand moves toward the wash water supply port 2, and the sand that has descended along the baffle plate 8 is further inclined. Since it descends along the tank bottom 1F, this time the tank wall 1C
As it heads to the side, it is again blown up by the jet stream from the diffuser pipe 7.

As this situation is repeated, the contaminated sand is washed while rotating as shown by arrow C, and as a whole it gradually moves in the direction of arrow B, which is opposite to the flow direction A of the washing water. Therefore, the contaminated sand does not flow out together with the washing water, and countercurrent washing can be performed.

As is clear from the above description, in the present invention, the contaminated sand to be washed moves in the opposite direction to the flow of the cleaning solution, so the contaminated sand does not flow out together with the cleaning water, and the cleaning water and contaminated sand are separated. Sufficient stirring can be obtained and efficient cleaning can be performed.

Also, since the washed sand is carried out from the washing tank at a position where the washing water is still clean and has just been supplied with washing liquid, there is no possibility that the dirt in the washing liquid will stick to the sand again when the water is drained from the washing tank. Cleaning can be carried out effectively without any problems.

[Brief explanation of drawings]

The drawings show an apparatus according to an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view thereof, and FIG. 2 is a horizontal sectional view thereof. 1...Cleaning tank, 2...Cleaning water supply port,
4... Washing sand carrying out device, 5... Washing water discharge port, 6... Contaminated sand supply port, 7......
Diffuser pipe, 8... baffle plate.

Claims (1)

[Scope of utility model registration request] A cleaning water supply port and a cleaning sand discharge device are provided at one end of the cleaning tank, and a cleaning water discharge port and a contaminated sand supply port are provided at the other end. A countercurrent sand washing device characterized in that a number of inclined baffle plates are provided at appropriate intervals on the other side of the air port so that the lower part is located closer to the washing water supply side than the upper part.