JPH04135094A - Dehydrator for sieve residue - Google Patents

Abstract

PURPOSE:To carry out washing and dehydration by compression of sieve residue at the same time and to eliminate the need for an equipment such as a conventional washer etc., by washing and removing silt, etc., by wash water, then, compressing and dehydrating the sieve residue only by a feeding blade. CONSTITUTION:The slit of the sieve residue supplied into a hopper 6 is washed and removed by the wash water from a jet 5c, compressed by a feeding blade 5a, fed to a small diameter side of a screen drum 1 and dehydrated and taken off from a output port 11 at its end part to the outside of the machine. On one hand, the silt washed and separated at the inlet part of the screen drum 1 passes through opening of the screen drum 1 and is taken off the drum. When the screen drum 1 is jammed in these operations, wash water is injected from a wash nozzle 10, in this way, the washing drum can be regenerated and continuous drive can be made.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a washing and dewatering device for sieve sludge generated at the entrance of a settling basin in a sewage treatment plant or the like.

[Conventional technology]

Conventionally, in sewage treatment plants, a dust remover is installed at the entrance of a settling basin to scrape up and separate the sieve residue that has accumulated in front of the entrance of the dust remover, and then introduce this scraped up sieve residue into a washer. After washing and separating the sand and mud, it is compressed and dehydrated using a sieve residue dehydrator. Fig. 2 shows a schematic diagram 70-, in which the sieve residue scraped up by a dust remover is conveyed by an endless conveyor.
The sifter is led to a sand washing machine, and the washed sieve residue is squeezed out by a dehydrator.

[Problem that the invention seeks to solve]

In the above-mentioned conventional apparatus, the scraped sieve residue is put into the washing machine again to wet it and dehydrate it. That is, the sieve residue that has been drained with a dust remover is put back into water to dehydrate the wet sieve residue. Further, in such a system, the equipment including the transport device and the washing machine is large and requires a large installation area.

[Means for solving problems]

This invention solves the above-mentioned conventional problems, and its gist is that the center shaft of a rotatably supported screen drum is provided with an inner surface of the screen drum on its shoulder surface. In a screw press in which a feed shaft having adjacent feed blades is supported to force feed raw materials supplied to one end of the screen drum to the other end, a hopper for feeding raw materials is connected to one end of the screen drum. In addition, a cleaning water spout is opened at the inlet of the screen drum, and a cleaning nozzle is provided around the rotation of the screen drum.

[Effect]

The apparatus according to the present invention is constructed as described above, and the sieve residue introduced into the hopper is first washed with washing water to remove sand and mud, and then only the sieve residue is compressed and dewatered by the feed blades. , taken out from the other end. That is, according to the present invention, the washing of the sieve residue and the pressing and dehydration are performed at the same time, and conventional equipment such as a washing machine is not required.

However, in this invention, the screen drum is rotatably supported and the cleaning nozzle is provided around it, so even if the screen drum becomes clogged during cleaning or press dehydration, it can be washed and regenerated. Continuous operation is possible.

The present invention will be specifically explained below with reference to the drawings.

〔Example〕

In FIG. 1, reference numeral 1 is a screen drum, 2 is a drive gear thereof, 3 is a drive motor, and 4 is a support roller.

Next, reference numeral 5 is a feed shaft supported within the screen drum 1, 5a is a feed blade wound around the feed shaft 5, 5b is a cleaning water supply path provided within the feed shaft, and 5c is a cleaning water spout. be. Reference numeral 6 indicates a hopper connected to the large diameter side of the screen drum 1. Reference numeral 7 indicates a washing water pump. The feed shaft 5 is driven by a motor 8 provided on the left side in the figure, and the reference numeral 9 at the right end in the figure is a rotary valve, and the reference numeral 10 is a washing water pipe for washing the screen drum.

In the sieve residue dehydration device configured in this way, the
The sieve residue fed into the screen 6 is washed with sand and mud removed by the washing water from the spout 5c, and is sent under pressure to the small diameter side of the screen drum 1 by the feed blade 5a, where it is dehydrated. It is taken out of the machine from exit 11. on the other hand,
The sand and mud washed and separated at the entrance of the screen drum 1 passes through the screen drum 10 in that section and is taken out of the drum. During the above operations, if the screen drum 1 becomes clogged, it can be regenerated by spraying cleaning water from the cleaning nozzle 10, allowing continuous operation. In addition, in the above-mentioned operation, the separated sieve sludge and sand mud are of course collected and treated separately, and the mesh stretched on the screen drum 1 is also adjusted as appropriate depending on the properties of the sieve sludge and sand mud. 0 [Effects of the Invention] As described above, according to the device according to the present invention, sieve residue containing sand and mud can be treated all at once without using a washer or the like that was required in the past. , it does not take up much space, can be operated continuously, and completely eliminates the conventional problems in sewage treatment plants, etc.

[Brief explanation of drawings]

FIG. 1 is a schematic vertical sectional view of a sieve residue dewatering apparatus according to the present invention, and FIG. 2 shows a conventional sieve residue treatment flow sheet. 1 Screen drum 5 Feed shaft 5a Feed vane
5c spout 6 Hosopar 10 Dust in the washing water pipe December 70, 1991 2. Name of the invention: Sieve residue dewatering device 3. Person making the amendment. Relationship with the case. Patent applicant address: 103 Furikanacheu Oukuninenbashi Address: 3-4-15 Nihonbashi, Chuo-ku, Tokyo Furinaishio Kikikou Name: Ishigaki Kiko Co., Ltd. Number of inventions increased due to company amendment 6. In column 7 of the title of the invention in the specification subject to amendment, the name of the invention in the statement of contents of the amendment is written as "Sieve residue washing and dehydrating device". Correct the dehydration bag of sieve residue.

Claims (1)

[Claims] (1) A feed shaft 5 having a feed blade 5a close to the inner surface of the screen drum 1 on its circumferential surface is supported on the center shaft of the screen drum 1 which is rotatably supported, and the feed shaft 5 is supplied to one end of the screen drum 1. In this screw press, a hopper 6 for feeding raw materials is connected to one end of the screen drum 1, and an inlet of the screen drum 1 is provided with washing water. This is a sieve residue dewatering device in which a spout 5c is opened and a cleaning nozzle 10 is disposed around the rotation of the screen drum 1.