JPS5850197A - Dehydrator - Google Patents

Abstract

PURPOSE:To dehydrate wash water of a ready-mixed concrete plant etc. quickly and surely by simple structure by folding double a part of a filter belt, holding it in V-shape and performing dehydration by providing pressure rollers at the folded part. CONSTITUTION:Cross-section of filter cloth of a filter belt 2 of a filter conveyor 1 is held in V-shape using a holding roller 3. Waste water of washing C is let flow from a hopper 7 on the filter belt 2, and passed through pressure rollers 4 provided upright on both sides of the center of the belt 2, and dehydrated by pressure. Squeezed water is received in a receiving pan 6 provided in the lower part of the belt 2 and dehydrated sludge is scraped off by a scraper provided on the terminal part of the conveyor 1. Clogging of the filter belt 2 is prevented by pressing a roller 11 having projections against the filter belt 2 of return side.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention holds a part of a filter belt of a filter conveyor in a V-shape or a U-shape when viewed in cross section,
If the two-folded part is exposed to cleaning waste water from the raw material processing plant, etc.
This invention relates to a dehydration device that performs pressurized dehydration by pouring filtrate and passing it between pressure rollers.

Some of the cleaning wastewater in ready-mixed concrete plants is discharged through #1 or #IR overtreatment, which is used in ready-mixed concrete production;
There was no trap device available.

Conventionally, the main method used for cleaning wastewater at ready-mixed concrete plants was to settle the sludge in a settling tank without a settling tank, and then drain the supernatant liquid into the sewer system and dig up the precipitate with a washer shovel, etc., and load it into a car for disposal. Mourning. However, this method is inefficient and requires a large area, so various types of dehydration equipment have recently been used. This dehydration equipment pressurizes the sewage placed in a sewage tank and is equipped with a cylindrical filter inside. There are devices that are introduced into a tank for dewatering and treat the accumulated sludge, but this causes the sludge to accumulate inside the filter, which deteriorates the dewatering efficiency, and it is also troublesome to take out the sludge inside. It has some drawbacks and is expensive.

Therefore, the present inventor developed a device that quickly and reliably dehydrates water with a simple structure using #11 filter belt.

The present invention will be described in detail below based on an embodiment shown in FIG. 1Ilvc.

Figures 1 and 2 show an embodiment of the present invention, in which a filter conveyor (filter belt (2)) driven by a drive roller (8) is used, and a cloth is used on the filter conveyor (1). 7 in the center of the width direction when viewed from the direction of travel.
Nine holding rollers (3) (3) are supported in the shape of a letter and are rotatably provided;
2) The cross section is held in a V-shape with both ends facing upward.

Filter bell with this cross section held in a V-shape) (2
) Fresh concrete washing waste water 0 is poured from the K hopper (7), and pressure rollers (4) are installed upright to sandwich the central part of the filter belt (2) from both sides.
It is constructed so that the waste water from cleaning fresh concrete is dehydrated under pressure by passing it between ...

Note that it is also possible to pressurize and dewater the concentrated sludge after washing wastewater is put into a sewage tank, precipitated, and the supernatant liquid is discarded. Is the water squeezed out during pressurized dehydration passed through the filter bell? (The sludge installed in the 210f section is received by a tray (6), and the dehydrated sludge is collected by a filter bell.) ) terminal flK
The attached scraper (5) scrapes off the adhered sludge, and the sludge is further peeled off (9 filter pels) (f)
a-ra-an with protrusions to prevent t9
(filter bell on the return side) (2) The upper K Jl pressure is provided to enable continuous dehydration treatment.

Next, place the weir plate trout on the filter belt (2) in the hopper (
7) is installed in front of the outlet to prevent the backflow of water-rich cleaning waste water from ready-mixed concrete. However, if the driving speed of the filter conveyor (1) is increased, this weir plate trout can be eliminated. However, the wastewater will not back up.

As another means, instead of this weir plate a, as shown in FIG.
The same effect can be obtained by increasing 1 sOs by providing K and pouring the non-filtrate into this from the hopper (7).

In addition, a ball whose tip can be rotated back and forth of the pressure roller (4) is attached to the bottom of the filter belt (2), which holds a support rod 0 with a disk attached with salt 9, each folded in half in the vertical direction. When driving the filter fan pair (1) before pouring non-filtered material, the filter belt (2)
The cross section is always maintained in a V-shape,
(21t) A filter belt with a V-shaped cross section when moved in the air (prevents the bottom of the pair from lifting up, thereby preventing waste water from being splashed around when pouring in the waste material, At the same time, it also prevents the filter belt (2) itself from meandering, and when the filter belt (2) shown in Fig. 3 is held folded in half, the bottom of the holding roller (3f) In order to prevent contact between the filter belt (2) and the filter belt (2), support rods (n) are provided before and after each of the holding rollers (3) to avoid wear (damage).

In addition, if the pressure roller (4) shown in Fig. 4 is made into a wood-tube tapered shape and is provided so as to close the opening of the filter belt (2) which is folded in half at the large diameter part at the upper end, it is possible to LiK is used to pressurize and dehydrate cleaning waste water.This is to prevent the dehydrated water or sludge from leaking from the opening.

In addition, in the embodiments shown in FIGS. 1, 2, and 4, the bottom part does not usually rise up or meander #1, so it can be carried out without providing this support rod a3. . In addition, the back side of the central part in the width direction of the r cloth is thinned and woven into a groove shape over the entire inner circumference of the nine filter belt (2
Since it can be completely folded into two parts by using the filter conveyor (1), it can run stably on the filter conveyor (1), and even during pressurized dehydration, water can be drained from the thin part of the f cloth that hits the bottom sK. It also has the effect of making it easier to discharge,
When removing dehydrated sludge, use Ktf and scraper (5
) to the filter belt (2), the thin I part in the center of the P cloth will not come into contact with the sharp edge of the scraper (5), so the scraper φ can be pressed to completely remove the sludge.
) must have a protrusion at the center S of the tip.

If the pressure rollers (4) need to be easily dehydrated, then only one pair of pressure rollers (4) may be provided. It can be carried out by installing two or more pairs of rollers, and by using rollers coated with rubber, waste water containing solid substances such as gravel can be absorbed by the elasticity of the rubber, so that sufficient dewatering can be achieved. be.

The dewatering device constructed as described above holds one section of the filter belt of the filter conveyor in a 7-shaped cross section, and pours the waste water from washing the ready-mixed concrete into it, so that the waste water does not flow out from the surrounding area. The dehydrated water flows to the end of the conveyor together with the sludge, allowing for continuous and efficient dewatering without mixing the sludge, resulting in a large processing capacity. Since it can be easily modified using a conveyor driven by a belt or chain, the manufacturing cost is low and the device is not large-scale, and it can be easily installed in each factory, etc., making it more effective. .

[Brief explanation of the drawing]

1 and 2 show one embodiment of the present invention, with FIG. 1 being a plan view and FIG. 2 being a front view. In addition, Figure IN3 is a plan view of another embodiment of the present invention, and 11
FIG. 14 is a partial perspective view of still another embodiment. 1... Filter conveyor belt 2... Filter belt 3... Holding roller 4... Pressure roller 5... Scraper patent applicant Eiji Baba

Claims (1)

[Claims] l A part of the filter belt of the filter conveyor,
Hold it in a vertically folded shape to receive the liquid to be irradiated,
A dewatering device characterized in that pressure rollers for dewatering are arranged on both sides of the scissors-folded filter belt.