JPH04104299U - Screen cleaning device for screw press - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a machine with high filtration capacity through two-sided filtration by installing a screen on the outer cylinder and feed shaft in a screw press, and to enable continuous operation by easily cleaning the screen. This is an attempt to realize a screw press. [Structure] An outer cylinder is supported so as to be reversed relative to a hollow feed shaft, a screen is stretched around the outer cylinder and the feed shaft, and high pressure fluid is applied around the hollow part of the feed shaft and the outer cylinder. A spout nozzle is installed to filter the stock solution supplied into the outer cylinder through both the screen of the outer cylinder and the screen of the feed shaft, and when these screen become clogged, both are automatically cleaned and regenerated even during operation. It was made so that it could be done.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is a cleaning device for the screen of a screw press used for dewatering sludge, etc. Regarding the improvement of In the clew press, the inner and outer screens can be automatically cleaned and continuous operation is possible. This paper proposes a screw press with high performance.

0002

[Conventional technology]

In a screw press, as mentioned above, a screen is installed on the outer cylinder and feed shaft. For example, there is a device proposed in Japanese Utility Model Publication No. 40-33983. this idea In this case, a screen is stretched over a fixed outer cylinder, and the feed shaft installed inside the outer cylinder is also hollow. A screen is installed around the periphery, and the filtrate from the outer cylinder and the filtrate in the feed shaft are separated from the machine. I try to take it out.

0003

[Problem that the idea aims to solve]

However, with the conventional equipment described above, if the operation continues, the screen will become clogged. If a clog occurs, the operation must be stopped and cleaned each time. And this washing It is relatively easy to clean the screen on the outer cylinder, but it is difficult to clean the screen on the feed shaft. It cannot be completely cleaned.

0004

[Means to solve the problem]

Therefore, this idea solves the conventional problems by taking the following measures. It has been decided. In other words, a spindle configured so that the outer cylinder rotates in the opposite direction with respect to the feed shaft. In a clew press, the feed shaft is made of punched metal and is hollow with a through hole at one end. A metal mesh is stretched around the periphery, and the hollow part is attached to the fuselage. A cleaning nozzle is connected to the trough attached to the feed shaft and the periphery of the outer cylinder. is arranged.

[0005]

[Effect]

This device is constructed as described above, and the stock solution supplied into the outer cylinder is The solid-liquid is separated by the screen on the feed shaft, and the filtrate from the outer cylinder is dripped and fed. The filtrate inside the shaft flows through the hollow part, flows into the trough attached to the machine, and is taken outside the machine. I can put it out. On the other hand, the solid content in the slurry is absorbed by the gap between the outer cylinder and the end of the feed shaft. It can be taken out of the machine as a cake.

[0006] Continuing this solid-liquid separation operation may cause the outer cylinder and feed shaft screen to become clogged. When this occurs, high-pressure fluid is ejected from a cleaning nozzle placed opposite these. By doing so, you can eliminate these clogging and also remove screws. - At the peripheral screen section at the end of the shaft, the cake is screened by high pressure fluid. Push up from the surface to prevent the cake from rotating with the screw shaft and improve the pressing operation. The rotation can continue. At this time, the high pressure fluid used for cleaning is For cleaning, place the feed shaft against the screen on the tray provided for the outer cylinder. The cake can be completely separated from the cake by being caught in an attached trough. It is. This invention will be specifically explained below based on the drawings.

[0007]

【Example】

In Figure 1, reference numeral 1 indicates a screen made of metal mesh, etc. stretched around the periphery. 2 is a feed shaft supported with its axis aligned with the outer cylinder 1. It is constructed by winding punched metal (a metal plate with many punched holes) into a conical shape. A spiral blade 3 is provided around the periphery, and a spacer made of metal mesh is provided. Clean is installed. 2 and 3 show the configuration of the screen portion mentioned above. Therefore, Figure 2 shows the configuration of the screen portion of the feed shaft 2, and the feed shaft 2 has a A screen 2a made of metal mesh is stretched, and Figure 3 shows the screen 2a of the outer cylinder 1. The outer cylinder 1 has a screen 1a stretched over its inner peripheral surface. Ru.

[0008] In addition, a through hole 2b is provided at the end of the hollow part of the feed shaft 2 (the left end in FIG. 1). The hollow part of the feed shaft 2 is connected to a trough 4 provided on the machine body, and A cleaning pipe 5 having a large number of cleaning nozzles 5a is arranged in the hollow shaft core of the feed shaft 2. be. Further, a cleaning pipe 6 having a large number of cleaning nozzles 6a is arranged around the outer cylinder 1. The cleaning tubes 5 and 6 are connected to a source of high pressure fluid. In addition, the symbol in the figure 7 is a roller supporting the outer cylinder, 8 is a hopper for supplying the raw solution, and the one shown in the figure is The structure is such that the outer cylinder 1 rotates in the opposite direction with respect to the feed shaft, but the hopper 8 is fixed. are doing.

[0009] This device is constructed as described above, and the stock solution supplied from the hopper 8 is , while being sent to the left in the figure by the spiral blades 3 of the feed shaft 2, the screen 1a and The solid and liquid are separated by the screen 2a of the feed shaft 2, and the filtrate is separated from the periphery of the outer cylinder 1 and the feed. The cake that is taken out of the machine from the hollow part of the shaft is located in the gap between the end of the outer cylinder 1 and the feed shaft 2. can be taken out of the machine.

0010 Then, by carrying out such solid-liquid separation operation, the screen 1a of the outer cylinder 1 and the feed When the screen 2a of the shaft 2 is clogged, the cleaning nozzles 5a and 6a By spraying pressurized water, etc., the blockage is removed and the screen is regenerated, and the operation is resumed. can be continued.

[0011] In other words, in conventional screw presses, once the screen becomes clogged, the operation stops. The rotation must be stopped and the screen cleaned, and the outer cylinder is fixed for this cleaning as well. Because of this, it took time to run the washer, and it was not possible to clean it evenly. However, in the device according to this invention, both the outer cylinder 1 and the feed shaft 2 are rotating. By installing the cleaning nozzles 5a and 6a at predetermined locations, cleaning can be done quickly and uniformly. It can be washed all at once. In particular, with conventional screw presses, When the screen on axis 2 becomes clogged, it takes a lot of effort to play it back. However, according to this invention, it is possible to automatically clean the product without touching it. It is something that can be done. Of course, this washing operation can be performed while solid-liquid separation continues. be.

0012 In addition, regarding the timing of cleaning the screens 1a and 1b, the cleaning timing of the outer cylinder 1 or the feed shaft 2 is determined. Detects screen clogging due to changes in driving motor torque (for example, excessive torque) Alternatively, the high pressure fluid pump may be operated depending on the filtrate discharge condition. It may be activated. In addition, with screw presses, filtration capacity decreases. The problem is not only that the screen is clogged, but also that the cake rotates with the end of the feed shaft 2. However, even in such cases, according to this invention, the feed shaft 2 Lifting the cake from the circumference of the feed shaft by sending high-pressure fluid through the screen This allows the cake to be fed again and the solid-liquid separation work to be restarted.

[0013]

[Effect of the idea]

In this way, the device according to this invention separates the stock solution into solid and liquid using both the outer cylinder and the feed shaft. It doubles its capacity compared to conventional screw presses and has special features. In addition, in the device according to this invention, if the screen of the outer cylinder and feed shaft becomes clogged, etc. This system automatically regenerates these to enable continuous operation. This completely eliminates all the drawbacks of the screw press.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view of a screw press to which this invention is applied.

FIG. 2 is a longitudinal sectional view of a portion of the outer cylinder according to the invention.

FIG. 3 is a longitudinal sectional view of a portion of the feed shaft according to the invention.

[Explanation of symbols]

1 Outer cylinder 2 Feed axis 4 Trough

Claims (1)

[Scope of utility model registration request] Claim 1: In a screw press configured so that an outer cylinder 1 rotates in the opposite direction with respect to a feed shaft 2, the feed shaft 2 is made of punching metal and is formed into a hollow shape, and a metal mesh 2a is stretched around the circumference of the screw press. A cleaning device for a screen in a screw press, in which the hollow part thereof is communicated with a trough 4 attached to the machine body, and cleaning nozzles 5a and 6a are arranged in the hollow shaft core part of the feed shaft 2 and the peripheral part of the outer cylinder 1. .