JPH0593680U - Screener dehydrator - Google Patents

Abstract

(57) [Summary] [Purpose] We propose a sludge dewatering device used in sewage treatment plants, etc., which can wash dewatered residue scraped up from a raw water reservoir with raw water to perform dewatering treatment. [Structure] A screen having a feed shaft extending horizontally is provided therein, and a raw water supply tank provided above the start end of the screen communicates with the screen, and a screen for discharging residue is connected to the other end of the screen. A damper was provided at the end opening of the discharge cylinder. The raw water supplied from the supply tank into the screen is trapped by the screen, and the trapped residue is conveyed to the other end inside the screen by the feed shaft, and further, the damper is pushed open through the discharge tube. Be discharged outside the aircraft. During this period, the residue that has been separated from the raw water is washed with a large amount of raw water and then squeezed in the discharge tube to remove water and dehydrated to obtain a residue from the damper part.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a dewatering device for a residue generated in a sewage terminal treatment plant or the like.

[0002]

[Prior Art]

 2. Description of the Related Art Conventionally, a device for dehydrating the residue generated in a sewage treatment plant is known. An example is the device of Japanese Utility Model Publication No. 56-10475. In this device, a long cleaning cylinder is moved while cleaning the residue, and water is drained by the screen portion added to the cleaning cylinder. Further, in this invention, the residue is crushed and then washed and dehydrated. In addition, as shown in FIG. 1, as a conventional technique, the screen end of the cylindrical screen is made to face the discharge portion of the scraped residue scraped up from the wastewater storage tank A, and the screened residue S is cleaned while cleaning There is also an actual device that is supplied to and dehydrated.

[0003]

[Problems to be solved by the device]

 However, in a device such as the device of Japanese Utility Model Publication No. 56-10475, the residue is separated from the raw water and the residue is washed again, which requires a separate separating device and a large amount of washing water. It becomes long and the device becomes large. Further, even if the actual apparatus as shown in FIG. 1 is used, a separate cleaning device N for the residue is required, and the installation location is limited due to communication with the scraping machine B or the like.

[0004]

[Means for Solving the Problems]

 Therefore, in this invention, the raw water itself is used to separate and wash the residue, and the separated and washed residue is automatically squeezed to drain the water. A raw water supply tank is provided above the start end of the screen with a screw shaft installed, and this raw water supply tank is connected to the start end of the screen, and at the other end opening of the residue discharge pipe connected to the end of the screen. In the normal state, a damper is provided which biases the opening portion in a blocking manner.

[0005]

[Action]

 The device according to the present invention is configured as described above, and the raw water can be directly supplied to the screen from above the starting end portion of the screen, and the raw water can be separated by the screen at the same time as the raw water. Can be washed by. That is, since the residue is separated at a minute amount, it is easy to separate, and since the amount of raw water is large, the separated residue can be washed, and the residue is constantly moved on the screen so that the residue moves. It is possible to prevent clogging. The screen residue separated in this way is conveyed toward the other end of the screen by rotating the screw, the moisture is removed, and the screen residue discharged from the other end opening is blocked at the other end of the discharge tube. As a result, the water is drained by being pressed into the discharge pipe in a compact manner. The damper of the discharge cylinder may be mechanically opened when the pressing force of the residue reaches a certain level. Hereinafter, the present invention will be specifically described with reference to the drawings.

[0006]

【Example】

 2 and 3, reference numeral 1 is a screen having slits, 2 is a raw water supply tank provided above the starting end of the screen, 3 is a screw shaft laid horizontally in the screen, and 4 is a screw shaft wound around the screw shaft 3. The screw 5 is a residue discharge tube connected to the end of the screen 1, and the end of the screen is raised so that a damper 6 is provided at the opening. The damper 6 is designed so that the opening is closed by a spring 7. Reference numeral 8 in FIG. 3 is a chute provided in the opening of the discharge tube 5. Further, in FIG. 2, reference numeral 2a denotes a raw water supply pipe to the supply tank 2, and reference numeral 9 denotes a separation water tank. In the illustrated example, the screen 1 has a gutter-shaped start end portion and a cylindrical rear-end portion.

The apparatus according to the present invention is configured as described above, and the raw water in the supply tank 2 is directly supplied to the starting end portion of the screen 1 as indicated by the arrow, and the screen 1 captures the residue S 2. , The separated water falls into the separated water tank 9. The captured screen residue S is conveyed toward the other end of the screen 1 by the screw 4 as the screen shaft 3 rotates, and is pushed into the discharge tube 5. The residue that has been pushed into the discharge tube 5 is then in a consolidated state, and water is further drained by the consolidated pressure. When the compacting pressure (compressing pressure) reaches a certain level or higher, the damper 6 is pushed up against the spring 7 and discharged from the opening of the discharge pipe, guided by the chute 8 and discharged outside the machine. The compaction pressure at which the damper operates can be set in advance, but it is also possible to adjust the set pressure or to make it operate periodically.

[0008]

[Effect of the device]

 In the treatment operation as described above, in the present invention, the raw water is directly filtered by the screen 1, so that the residue can be reliably captured and separated at a minute stage, and a large amount of the raw water can be obtained. Therefore, the residue can be washed at the same time, the apparatus for separating residue and the cleaning device, which have been required in the past, are not required, and the facility is inexpensive and the operation is simple. Also, by providing a damper in the discharge tube, the compaction pressure (squeezing pressure) can be adjusted, the water content of the residue can be adjusted, and the screw 4 moves the residue on the screen. Since the screen surface can be washed with a large amount of raw water, there is an advantage that the screen 1 is not clogged.

[Brief description of drawings]

FIG. 1 is a schematic side view of a conventional screen residue dehydrator, which is shown as a cross-sectional view.

FIG. 2 is a vertical sectional side view of a screen residue dehydrator according to the present invention.

FIG. 3 is likewise an enlarged view of the damper portion.

[Explanation of symbols]

 1 Screen 2 Supply Tank 3 Screw Shaft 5 Discharge Tube 6 Damper

Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location B03B 5/00 Z 8925-4D C02F 11/12 D 7824-4D

Claims (1)

[Scope of utility model registration request] 1. A screen 1 incorporating a screw shaft 3 therein.
A raw water supply tank 2 is provided above the starting end of the screen 1, and the raw water supply tank 2 communicates with the starting end of the screen 1, and at the other end opening of the residue discharge pipe 5 connected to the end of the screen 1. A drainage device for residue, which is characterized in that a damper 6 for urging the opening to block the opening is provided in a normal state.