JPH0629797U - Screening device for screen residue in screen residue dehydrator - Google Patents

Abstract

(57) [Abstract] [Purpose] We propose a dewatering device for sewer residue in sewers, which can easily wash and separate the contaminants adhering to the residue. [Structure] In a sewer screen dehydrator, a feed device provided in a screen cylinder is a screw shaft, and a cleaning pipe is opened so as to face a terminal end of a screw wound around the screw shaft. Since the residue sent by the screw is crushed, the contaminants adhering to it can be washed off completely. Also, since the residue sent in has not yet solidified, the cleaning water pressure may be low,
Both the drive power of the device and the amount of washing water are small.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an apparatus for cleaning residue on a residue dehydrator such as sewage.

[0002]

[Prior art]

 A conventional screen residue dehydrator is shown in the drawing of Japanese Patent Laid-Open No. 4-66297. In this invention, the residue on the screen is conveyed by a plunger, and cleaning of contaminants adhering to the residue and contaminants adhering to the screen is not mentioned, but cleaning is required. In some cases, the end of the screen is washed with high pressure water.

[0003]

[Problems to be solved by the device]

 However, sewage consisting of domestic wastewater and human waste contains various solid impurities such as feces in addition to fibrous substances such as hair and paper pieces, which cannot be separated on the screen part. It is sent to the end of the screen while still attached to the residue. For this reason, solid residue is often accumulated at the end of the screen due to solid contaminants, which often makes discharge impossible. In such a case, conventionally, high-pressure washing water is sprayed on the solidified residue to wash the residue, but it is extremely difficult to clean because it is solidified.

[0004]

[Means for Solving the Problems]

 The present invention solves the above-mentioned problems, and uses a screw shaft as a feeding device to crush crushed residue and to wash the crushed residue. In the place where the screw shaft is supported in the screen cylinder and the undiluted solution supplied from one end of the screen is conveyed toward the other end to be filtered and dehydrated, in the screen residue dehydrator, at the end part of the screen, The washing water pipe is opened so as to face the end portion of the feed spiral blade wound around the screw shaft 2.

[0005]

[Action]

 Since the device according to the present invention is configured as described above and uses the screw shaft as the feeding device, the dehydrated residue in the stock solution is crushed by the spiral blade while being fed by the screw shaft. To be done. Then, since the washing water is discharged to the crushed residue, the contaminants attached to it can be washed off completely. In other words, in this invention, since the solidified residue and the residue are washed immediately after dehydration, the solid matter can be easily separated, less washing water is required, and the pressure thereof is low. The washing water containing impurities is discharged through the screen. The present invention will be specifically described below with reference to the drawings.

[0006]

【Example】

 FIG. 1 shows a main part of a residue dehydrator. In the figure, reference numeral 1 is a screen cylinder, 2 is a screw shaft supported in the screen cylinder 1, and 2a is a feed spiral wound around the screw shaft 2. The blades 3 are inlets for sewage, 4 squeeze pipes for residue, and 5 are casings for incorporating a dehydration section, and a treated water tray 5a is formed at the bottom. Next, reference numeral 6 is a washing water pipe, which is opened so as to face the ends of the screw shaft 2 and the spiral blade 2a. In the illustrated example, as shown in FIG. 2, two discharge ports 6a are provided. In addition, the symbol S indicates the residue that has been sent to the compression tube 4, and this residue is sequentially sent into the discharge pipe 7 connected to the compression tube 4 and taken out of the machine. Reference numeral 9 is a drive sprocket for the feed shaft 2, and 10 is a manhole cover.

The residue cleaning apparatus according to the present invention is configured as described above, and the sewage supplied from the inflow port 3 is conveyed inside the screen cylinder 1 by the spiral blades 2a while the screen 1 is being conveyed. Filtered by. Then, only the residue S in the dirty water is sent to the end portion of the screw shaft 2 and is washed by discharging water from the washing pipe 6. That is, the solid residue such as stool mass that cannot be separated by the screen 1 is attached to the residue S separated from the waste water, but these can be completely washed away. The washing water is separated into the saucer 5a through the screen cylinder 1, and the washed residue S is then pumped to the squeeze pipe 4 by the rotating spiral blade 2a and further squeezed and squeezed. The residue S is taken out of the machine through the discharge pipe 7.

In the dewatering and washing operation of the residue as described above, in this invention, since the feeding device provided in the screen cylinder 1 is constituted by the screw shaft 2 having the spiral blade 2a, the water is separated during the transportation. The smashed residue S can be crushed, and the washing water is discharged to the crushed residue S, so that the adhered solid matter can be completely washed away. In addition, since the washing water is released immediately after being sent to the residue which is not solidified and remains, it is easy to wash and does not require high-pressure washing water.

[0009]

[Effect of device]

 As described above, in the device for cleaning the residue according to the present invention, the screw shaft is used as the feeding device provided in the screen cylinder, and the cleaning device is provided at the end of the feed, so that the residue that is separated from the waste water is crushed. As a result, the solid matter can be easily washed, and at the same time, a small amount of washing water is sufficient and low pressure is sufficient.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view of a main part of a screen residue cleaning device according to the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 Screen cylinder 2 Screw shaft 2a Spiral blade 6 Wash water pipe

Claims (1)

[Scope of utility model registration request] 1. A screen residue dehydrator in which a screw shaft 2 is supported in a screen cylinder 1 and the undiluted solution supplied from one end of the screen cylinder 1 is conveyed to the other end for filtration and dehydration. 1. A cleaning device for cleaning residue in a residue dehydrator, characterized in that a cleaning water pipe 6 is opened so as to face the end part of the feed spiral blade 2a wound around the screw shaft 2 at the end portion of 1.