JPH0576898A - Grinding and washing device for screen residue - Google Patents

Abstract

PURPOSE:To wash the non-ground matter of scraped up and recovered screen residue under grinding to supply the same to a dehydration process. CONSTITUTION:A washing water jet means always injecting washing water to the non-ground matter such as sludge in the screen residue recovered from a sewage treatment plant and charged in a grinding and washing device 2 under high pressure and a press plate roller grinding the non-ground sewage in the charged screen residue are provided in the casing 21 of the grinding and washing device 2. A rinsing tank 5 is arranged at the position where the ground screen residue falls from the gap between a roller 23 and a press plate 22. A nozzle 52 injecting washing water having rinsing and discharge functions under high pressure is provided to the rinsing tank 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a screen for cleaning uncrushed screen residue scraped and collected from a water channel such as a sewage treatment plant or a pumping station while crushing and supplying the screen residue to a dehydration process. The present invention relates to a device for crushing and cleaning residue.

[0002]

2. Description of the Related Art In a sewage treatment plant, a pump station, etc., solid matter mixed in wastewater is separated from wastewater and the solid matter and wastewater are treated separately. This solid matter is generally called screen residue, and since it is scraped and collected from wastewater with a dust remover, it also contains a large amount of uncrushed human dung, and the water content is extremely high. Not to mention dumping and incineration, it is not possible to carry it to the dumping position. For this reason, the collected screen residue is dehydrated to the required water content. As a dehydrator for this screen residue
7-43049 and JP-A-1-117118.

However, uncrushed human feces are also contained in the screen residue collected from the sewage treatment plant. Therefore, if the screen residue is directly dehydrated by a piston type dehydrator, the uncrushed human feces and the like will be crushed and then transported to the incinerator via a conveyor truck for disposal. Therefore,
Even when the screen residue is dehydrated, crushed human feces contained in the screen residue give off a bad odor, and the working environment becomes poor in terms of hygiene.

It is an object of the present invention to more reliably dehydrate the screen residue by crushing and washing the recovered screen residue and then dehydrating it, and sending it to the next conveyance, incineration and discarding.

[0005]

Means for Solving the Problems The present invention has been made in order to achieve the above-mentioned object, and it is possible to collect uncrushed substances such as sludge in screen residue collected from a sewage treatment plant and put into a crushing and washing apparatus. On the other hand, the washing water spraying means for constantly spraying the washing water at a high pressure and the press plate roller for crushing the uncrushed dirt in the thrown screen residue are provided in the casing of the crushing cleaning device and the crushed screen residue is removed. The essence is that a rinsing tank is arranged at a position where it falls from between the roller and the press plate, and that this rinsing tank is provided with a nozzle for rinsing and discharging the cleaning water at high pressure. .

[0006]

[Operation] Screen residue collected from a sewage treatment plant is passed between a roller equipped with a simple cleaning function and a press roller to crush uncrushed sludge and the like, and after washing with high-pressure washing water, Desired dehydration is performed by a pressure type dehydrator using a piston. As a result, even screen residue mixed with uncrushed sludge can be reliably crushed and washed, incinerated as it is, and odors can be prevented from scattering.

[0007]

The present invention will be described below with reference to the illustrated embodiments. The screen residue, which has been fried and collected by a dust remover or the like from a water channel such as a sewage treatment plant or a pumping station, is continuously or intermittently supplied to the crushing / cleaning device 2 via the conveyor 1 and then crushing / cleaning device 2 It is supplied to the pressure dehydrator 3 arranged below this. The crushing / cleaning device 2 is arranged at a lower position of the upper end of the conveyor 1, and is also arranged above the pressure dehydrator 3 so as to also serve as a hopper so that the screen residue is easily introduced.

In the crushing and washing apparatus 2, a press plate 22 and a roller 23 are provided inside a casing 21 so as to face each other, and the roller 23 is rotated to move the press plate 22 to the roller 2.
A cleaning nozzle 24 is provided so as to press against the 3 side at a required pressure and spray cleaning water toward the outer peripheral surface of the roller or between the roller and the press plate at a required high pressure to clean dirt.

As a result, the recovery screen residue introduced into the casing 21 directly from the conveyor 1 or via the switching chute 4 falls between the press plate 22 and the roller 23, and the rotation of the roller 23 and the press plate 22. By the pressing force of the roller to the roller side, the uncrushed dirt in the screen residue is crushed and washed with washing water sprayed at high pressure.

The press plate 22 has an arcuate shape, its upper end is pivotally attached to the casing 21, and its lower end is formed along the outer peripheral surface of the roller 23. Therefore, since the space between the press plate 22 and the roller 23 is wide on the upper side of the press plate and narrow on the lower side, the screen residue dropped on the press plate by the rotation of the roller naturally follows the surface of the press plate. And slides downward, and is strongly pressed between the press plate and roller at the roller lower position to be dehydrated.

Further, the rinsing bath 5 is formed on the inner bottom surface of the lower part of the casing 21 and at the position where the crushed screen residue falls between the roller and the press plate. The rinsing and washing tank 5 is a shallow tank, and an inclined weir plate 51 is provided on the discharge chute 25 side, and a wash water injection nozzle 52 is provided on the opposite side of the weir plate 51, so that the wash water is pressurized toward the weir plate 51 at a high pressure. Let's spray it with. As a result, the screen residue dropped in the rinsing tank 5 is rinsed and washed by jetting washing water, and after passing through the barrier plate 51 by this jet pressure, is sent to the lower pressure dehydrator 3 through the discharge chute 25. is there.

The pressure dewatering device 4 is provided with a piston (or screw) of a hydraulic cylinder for squeezing and dewatering the screen residue supplied from the rinsing and washing device 5 from the crushing and washing device 3 in the dewatering cylinder, and By operating this cylinder, this piston moves forward and backward in the cylindrical dehydration cylinder to intermittently squeeze and dehydrate the screen residue supplied from the rinse tank through the discharge chute 24.

[0013]

EFFECTS OF THE INVENTION According to the present invention, even if uncrushed filth is mixed in the screen residue collected from a sewage treatment plant or the like, it is crushed and washed in advance by a simple washing means composed of rollers, a press plate and a washing water jet nozzle. In addition, since this is rinsed and rinsed in the rinsing tank for pressure dehydration, it is possible to continuously treat the screen residue collected from the treatment plant, etc., and to directly incinerate it. There is an advantage that processing can be performed easily.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing a crushing and washing apparatus for screen residue of the present invention.

FIG. 2 is a plan view of the same.

[Explanation of symbols]

 1 Conveyor 2 Crushing / cleaning device 21 Casing 22 Press plate 23 Roller 24 Cleaning nozzle 25 Discharging chute 3 Pressurizing / dehydrating device 4 Switching chute 5 Rinsing / rinsing tank 51 Weir plate 52 Cleaning water jet nozzle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masao Matsuoka 3-11-1 Shimozakabe, Amagasaki City, Hyogo Prefecture Hitachi Kiden Kogyo Co., Ltd.

Claims (1)

[Claims] 1. Washing water injection means for constantly injecting washing water at a high pressure with respect to uncrushed substances such as sludge in screen residue collected from a sewage treatment plant and put into a crushing and washing device,
A press plate roller for crushing uncrushed waste in the input screen residue is provided in the casing of the crushing / cleaning device, and a rinsing bath is installed at a position where the crushed screen residue falls from between the roller and the press plate. A screen residue crushing and washing apparatus, characterized in that the rinsing tank is provided with a nozzle for spraying washing water having a rinsing and discharging function at high pressure.