JPH0319947Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a sludge treatment device that cleans and treats sludge that settles in a settling basin of a sewage treatment plant or the like.

Conventional technology Conventionally, dirty sand has been agitated and washed using agitating blades installed on both sides of the inner surface of the washing tank. Are listed. However, it was observed that dirt settled at the bottom of the cleaning tank between the opposing stirring blades and was not discharged.

Problems to be Solved by the Invention The washed dirt does not accumulate at the bottom of the washing tank where dirt settles, but is smoothly discharged to the downstream side, and the washing effect is improved.

Means for Solving the Problem In a dirty sand treatment device in which dirty sand is charged into a cleaning tank and is agitated and washed using stirring blades provided on opposite inner surfaces of both sides of the cleaning tank, the bottom part of the cleaning tank between the opposing stirring blades is A mountain-shaped sediment accumulation prevention part is provided at the washing water retention position.

Embodiments The present invention will be described below based on embodiments shown in the drawings. In the figure, 1 is a rectangular cleaning tank designed to wash the sludge collected in a settling basin or other means to remove organic matter contained in the sewage. supply. Additionally, cleaning water can be supplied as needed.

Stirring blades 2, 2 are provided independently on both inner surfaces of this rectangular cleaning tank 1, so that both stirring blades face each other. Next, a mountain-shaped sediment accumulation prevention plate 3 is provided at a substantially central position between both stirring blades and at the bottom of the cleaning tank. This sediment accumulation prevention plate has a mountain shape so that the dirty sand can easily fall to the bottom, and the upper tip can be shaped as required, such as a semicircular arc instead of a sharp edge.

Then, at the bottom of the cleaning tank of this sediment accumulation prevention plate,
A plurality of cleaning water supply nozzles 4 are provided. As shown in FIG. 4, this nozzle 4 is rotatably provided and the nozzle direction can be changed freely.

Next, although not shown in the drawings, a baffle plate or an openable and closable lock can be provided in order to prevent the washing water and dirt that are stirred and washed from passing through to the next process.

When the next step is reached, the organic matter and the inorganic matter, that is, the washed sand, are separately discharged out of the tank by the dust remover 5 and the conveyor 6, respectively. This dust remover uses a back-scratching screen and is installed to block the water flow in the tank, which agitates and captures suspended organic matter (garbage) and allows sand to pass through with the cleaning water. Conveyor 6 located below the dust remover
The washed sand is collected and discharged.

An overflow trough 7 shall be provided in the cleaning tank. With the above-described configuration, the dirty sand put into the cleaning tank is washed by separating organic matter and inorganic matter by the stirring flow generated by the stirring blade. In addition, the washing water supply nozzle attached to the sediment accumulation prevention plate increases the stirring flow by the stirring blades, and also repels the sediment that is about to settle, thereby preventing accumulation. The cleaning water can be supplied from this nozzle 4 without separately supplying cleaning water.

In the next step, the stirred and washed dirty sand is used to separate organic waste and inorganic sand, gravel, etc. from the tank using a dust remover and a conveyor.

Effects of the invention When using the present invention, a sediment accumulation prevention part is provided at the cleaning water flow retention position between the two stirring blades installed opposite to the cleaning tank to prevent sediment accumulation and improve the stirring effect of the stirring blades. It has a enhancing effect.

[Brief explanation of the drawing]

FIG. 1 is a front view, FIG. 2 is a plan view, FIG. 3 is a side view, and FIG. 4 is a cleaning supply nozzle. 1...Cleaning tank, 2...Agitation blade, 3...Sand accumulation prevention plate, 4...Washing water supply nozzle, 5...Dust remover, 6...Conveyor, 7...Overflow trough.

Claims (1)

[Scope of utility model registration request] In a dirty sand treatment device that charges dirty sand into a cleaning tank and agitates and cleans it using stirring blades provided on both sides of the inner surface of the cleaning tank, a mountain-like shape is provided at the cleaning water retention position at the bottom of the cleaning tank between the opposing stirring blades. A sewage treatment device characterized by being provided with a sediment accumulation prevention section.