JPH06587U - Screw press with cleaning device - Google Patents

Abstract

(57) [Summary] [Objective] To provide a screw press with a cleaning device capable of cleaning the screen plate in the secondary dehydration zone of the screw press. [Structure] Feed vane 4 horizontally installed inside housing 1
At the outer periphery of the rotary shaft 3 in the secondary dehydration zone around the rotary shaft 3 extending from the large diameter side of the cone-shaped feed shaft 2 having
Further, a cleaning liquid supply pipe 6 is attached to the inside of the screen plate 5, the cleaning liquid is supplied from the cleaning liquid inlet 9, the cleaning liquid is caused to flow from the inside of the screen plate 5, and a part of the liquid is discharged through the filtrate discharge pipe 10. The filtrate is discharged from the outlet 11 to the outside of the system.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a screw press with a cleaning device, and more particularly to a screw press having excellent dewatering efficiency without clogging of a screen plate and clogging of a filtrate tube.

[0002]

[Prior art]

 The conventional screw press 21 feeds the cake K from the cake inlet 22 and guides the feed blades 25 of the cone-shaped feed shaft 24 that is laterally installed inside the housing 23 to reduce the diameter of the cone-shaped feed shaft 24. From the side to the large diameter side (right side in FIG. 2), compressed by the reduction of the area between the housing 23 and the feed shaft 24, and the filtrate is filtered by the screen drum 26 attached to the inner surface of the housing 23. Is discharged outside the system and is primarily dehydrated.

The cake K that has passed through the feed shaft 24 moves to the side of the rotary shaft 27 that extends the feed shaft 24, is blocked from flowing out by the damper 28, and is further dehydrated in this portion (secondary dehydration zone). The filtrate is filtered by a screen plate 29 installed around the rotating shaft 27 and discharged from the filtrate pipe 30 at the other end of the screen plate 29 to the outside of the system to improve the dehydration efficiency.

[0004]

[Problems to be solved by the device]

 However, if the screen plate 29 is clogged or the filtrate tube 30 is clogged and the dehydration in the secondary dehydration zone is hindered, there is no way to clean the eye holes during operation, and stop and remove the cake for cleaning. Since it is necessary, there is a drawback that it causes a decrease in operating efficiency and a decrease in dehydration efficiency.

In view of the present situation, the present inventors have conducted earnest research to develop a screw press capable of continuous operation without clogging of the screen plate or clogging of the filtrate tube, and as a result, We have completed a screw press with a cleaning device that can be cleaned.

[0006]

[Means for Solving the Problems]

 The present invention relates to a screw press having a screen plate on the large diameter side of a cone-shaped feed shaft having a rotatable feed blade extending horizontally inside a housing, and a rotary shaft extending the large diameter of the feed shaft. The cleaning press is equipped with a cleaning liquid supply pipe on the outer periphery and inside the screen plate, and the cleaning liquid is passed from the rotary shaft side to the inside of the screen plate to clean the screen plate.

[0007]

[Action]

 The present invention is configured as described above, and the cleaning liquid supply pipe is attached around the rotation shaft extending from the large diameter of the feed shaft and inside the screen plate. In the present invention, when the screen plate is clogged and the filtrate decreases, the cleaning liquid is supplied intermittently at regular intervals to pass the cleaning liquid inside the screen plate, that is, in the direction opposite to the flow of the filtrate. Pour water to remove cake on screen plate.

Moreover, since the present invention has a simple structure in which the cleaning liquid supply pipe is attached around the rotary shaft extending from the feed shaft, it can be easily applied to the conventional screw press and dehydration is possible. In addition to improving efficiency, there is almost no stoppage of operation due to clogging of the screen plate, and the efficiency of continuous operation can also be improved.

[0009]

【Example】

 1 is an embodiment of the present invention, the present invention will be described in detail with reference to the drawings. Inside a screw press housing 1, a cone-shaped feed shaft 2 having a small diameter at the front end and a large diameter at the rear end is rotatably provided horizontally, and further extends from the large diameter side to extend from a rotation shaft 3 Is installed. A feed blade 4 is attached to the outer peripheral surface of the feed shaft 2.

A secondary dehydration zone is formed around the extended rotary shaft 3, and a cleaning liquid supply pipe 6 is attached to the outer periphery of the rotary shaft 3 and between the screen plate 5 and the cleaning liquid supply pipe 6. . In FIG. 1, reference numeral 7 is a cake inlet, 8 is a damper, 9 is a cleaning liquid inlet, 10 is a filtrate discharge pipe, 11 is a filtrate discharge port, and 12 is a screen drum.

When the screen plate 5 in the secondary dehydration zone is clogged, the cleaning liquid is supplied from the cleaning liquid intake port 9 to the cleaning liquid supply pipe 6. The cleaning liquid flows along the rotary shaft 3 toward the large diameter side of the cone-shaped feed shaft 2, flows from the tip thereof to the screen plate 5 on the outer periphery, and flows in the opposite direction to the filtrate flowing from the outside of the screen plate 5. A part of the cleaning liquid is discharged from the filtrate discharge port 11 along the rotary shaft 3 through the filtrate discharge pipe 10. By the supply of the cleaning liquid, the cake clinging to the screen plate 5 and causing clogging and the cake in the filtrate discharge pipe 10 are cleaned and removed.

In the present invention, since the space of the secondary dehydration zone around the rotary shaft 3 extending from the feed shaft 2 is narrower than that of the conventional screw press, the water squeezing action in the secondary dehydration zone is improved. As a result, there is also an effect that the dehydration efficiency can be improved. In cleaning, the damper 8 can be slightly opened to facilitate the flow of the cleaning liquid, and the cleaning effect can be further improved.

[0013]

[Effect of device]

 As described above, according to the present invention, the cleaning liquid supply pipe is attached around the rotation shaft and inside the screen plate in the secondary dehydration zone around the rotation shaft extending from the feed shaft, and the cleaning liquid is supplied from the cleaning liquid supply pipe. By supplying it, the screen plate and the filtrate discharge pipe can be easily cleaned, the clogging which is a drawback of the conventional screw press can be easily eliminated, and the dehydration efficiency and the operation efficiency can be improved. You can

[Brief description of drawings]

FIG. 1 is a schematic sectional view of an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of a conventional device.

[Explanation of Codes] 1: Housing 2: Feeding shaft 3: Rotating shaft 4: Feeding blade 5: Screen plate 6: Cleaning liquid supply pipe 7: Cake inlet 8: Damper 9: Cleaning liquid intake port 10: Filtration discharge pipe 11: Filtration discharge Exit 12: Screen drum

Claims (1)

[Scope of utility model registration request] 1. A screw press having a screen plate on the large diameter side of a cone-shaped feed shaft having rotatable feed vanes horizontally extending inside a housing, wherein a large diameter of the feed shaft is extended. A cleaning liquid supply pipe is attached on the outer circumference of the shaft and inside the screen plate.
A screw press with a cleaning device, characterized in that the cleaning liquid is passed from the rotary shaft side to the inside of the screen plate so that the screen plate can be cleaned.