JPH0413249B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is a method for separating waste residue generated from a settling basin in sewage treatment using a screen made of paper, food waste, plastic bags, fibers such as cloth, etc. , a storage hopper located at a high place, and a sludge transporter for transporting to the next stage processing equipment such as an incinerator.

[Conventional technology]

Before transporting the residue to a storage hopper, incinerator, or other processing equipment, the residue is washed and dehydrated in advance.
Various methods have been devised as means for washing and dehydrating the residue. In addition, a skip elevator, for example, is currently used as a transport machine for transporting the residue after cleaning and dewatering to the next processing machine located at a location higher than the settling basin.

[Problem that the invention seeks to solve]

However, with regard to the skip elevator mentioned above, there are concerns such as intermittent operation, contact with the eyes, and leakage of odor into the surrounding environment, as well as the need to adjust the wire rope and sheave car.
Currently, there are problems such as the need for maintenance of the drive device and the generation of noise due to contact between the bucket troller and the guide frame rail when the bucket is raised and lowered, and a satisfactory transporter has not yet been provided.

The purpose of this invention is to solve the above-mentioned problems, and to enable smooth continuous operation in the sludge transport machine that transports the sludge to the next stage processing machine located at a high place, and to provide a system that is sealed in the piping. By doing so, the residue is isolated from the outside environment, and by using an extrusion mechanism, the structure of the conveyor is simplified as a whole, and the effort required for equipment adjustment and maintenance is minimized. The goal is to provide the following.

[Means for solving problems]

In order to solve the above problems and achieve the above objects, the present invention is configured as follows.
That is, the present invention forms a transport path for transporting the residue to a high place from an extrusion mechanism and an upwardly sloped straight pipe, and also includes steps in which the diameter of the straight pipe is gradually increased from the bottom to the top. The present invention relates to a sludge transporting machine characterized in that a part is formed. Furthermore, to explain in more detail, this sludge transporter uses a hydraulic cylinder, pneumatic cylinder, or electric cylinder as the extrusion mechanism, and whether the cylinders are two cylinders or one cylinder, Further, the extrusion cylinder may include a plurality of extrusion cylinders. In the case of two cylinders, the former cylinder compresses and dehydrates the residue, and the latter cylinder dehydrates and pushes up and transports the residue, and both processes of compression dewatering and pushing up transport may be combined, or one In the case of a cylinder, both processes of compressing and dehydrating the residue and pushing it up and transporting it are performed simultaneously. Furthermore, when the extrusion cylinders are arranged in multiple stages, the pressing and dewatering process is performed in a cylinder different from the first cylinder, but by combining straight pipes, it is possible to carry the residue to a higher location. Note that the compression dehydration of the residue may be performed using a device other than a cylinder, and may be performed using a commonly used dehydrator such as a screw press or a roll press.

[Effect]

Since the sludge conveyor according to the present invention is constructed as described above, it operates as follows. That is, the residue extruded by the extrusion mechanism is compressed by the extrusion pressure, is pushed up in an upwardly sloping straight pipe, and is conveyed, and is finally sent to the next processing machine, e.g. , is thrown into the hopper of the incinerator. The gravitational force acting on the scum inside a straight pipe is divided into a force component parallel to the slope inside the straight pipe and a force component perpendicular to the slope inside the straight pipe, and the latter component causes a shear force corresponding to the friction coefficient between the slope and the scum. A resistance force is generated in the residue, but since the straight pipes of the conveyance path of this invention form step portions at appropriate places, this slipping resistance force can be directly supported by the step portions of each straight pipe. The force to push up the residue, that is, the pushing force of the extrusion mechanism, is made as small as possible, and even if the extrusion mechanism is small, it is possible to smoothly push the heavy residue to a high place. . In this way, the diameter of the straight pipe increases stepwise from the bottom to the top, so the dehydrated residue that tends to slide down when the residue is transported is absorbed by the step part of each straight pipe diameter. The residue to be pushed up is smoothly lifted to a high place by the extrusion mechanism. In addition, the hydraulic mechanism can be operated continuously, and the conveyance path, which is a combination of straight pipes, has a simple structure as a whole, and the residue is conveyed within the pipes and is not exposed to the surrounding environment.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a sludge transporter according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a residue conveyor in which the hydraulic mechanism, which is one of the extrusion mechanisms, is composed of one hydraulic cylinder. 1 is the hydraulic unit that cleans screen residue, that is, paper, toilet paper, kitchen waste such as food waste, plastic bags, human excrement, and fibers such as cloth generated from the settling basin during sewage treatment. After that, the scum is introduced from the sludge input chute 2 and reaches the inside of the hydraulic cylinder 3. The outlet of the hydraulic cylinder 3 is arranged at an angle of approximately 5° to 90°, preferably 45° to
It is connected to a straight pipe having an upward slope at an angle of 75 degrees, that is, the first conveying pipe 4. The residue is compressed and dehydrated in the bent pipe section. 1st
Straight pipes are connected above the conveyance pipe 4, and these straight pipes are connected in sequence as a second conveyance pipe 5, a third conveyance pipe 6, and a fourth conveyance pipe 7. It extends linearly at the same slope as pipe 4 (45° to 75°). For example, the first to fourth conveyance pipes 4 to 7 each have a diameter of 250 mm,
The pipes are 300mm, 350mm, and 350mm, each having a length of 2.5m, with a total length of 10m, and a height difference of about 8.7m to 10m. The uppermost end of the fourth conveyance pipe 7 is curved, facing diagonally downward, and is configured to serve as a sludge outlet and send the sludge to a sludge storage hopper 8 of an incinerator or the like.

Connection part between the first conveyance pipe 4 and the second conveyance pipe 5
a ₁ and the connection part a ₂ between the second conveyance pipe 5 and the third conveyance pipe 6, the pipe center lines are continuous on a straight line, but there is a stepped portion 11 according to the difference in the diameter of the pipes. Therefore, in the transportation piping process in which compressed and dehydrated residue rises in the transportation piping, if there is no difference in the diameter of the piping, this level difference prevents slippage due to frictional resistance with the inner surface of the piping and the influence of gravity. Since the part 11 receives the residue, it is possible to prevent the residue from slipping down, and the residue can be smoothly pushed up to a high place.

Reference numeral 9 denotes a water collection gutter for the dewatered liquid removed from the screen by a hydraulic cylinder during the pressing process.

Next, with reference to FIG. 2, the step portion 11 and the conveyance of the residue therein will be explained in detail.

FIG. 2A is a diagram showing a stepped portion 11 connected from the first conveyance pipe 4, which is a straight pipe with a diameter d1, to the second conveyance pipe ₅ , which is a straight pipe with a diameter d2 _, which is one step larger. In this case, both diameters d ₁ and d ₂ have a conveying pipe step diameter ratio of d ₂ =(1.1 to 1.4)×d ₁ , preferably d ₂ =(1.14 to 1.5)×d ₁ .

To explain the behavior of the transported sludge in _the transport process shown in _FIG . ₂ , when entering the zone of the second conveying pipe 5 with length l ₂ , the diameter is d ₁
Since it spreads from to d ₂ , the residue is left open.

(ii) When the residue moves to the upper part of the zone of the second conveying pipe 5, it is consolidated in the zone and becomes full in the zone.

(iii) When the consolidated residue moves from the zone of the second conveyance pipe 5 to the zone of the third conveyance pipe 6 having a diameter d ₃ and a length l ₃ , it becomes open as in the case of (i) above, The residue can be transported smoothly.

(iv) The residue moves from the zone of the first conveying pipe 4 to the zone of the second conveying pipe 5 and the zone of the third conveying pipe 6 due to the action of gravity, especially when being pushed up and conveyed directly. Since it is close to the inner surface of the pipe, which is affected by friction with the inner surface of the pipe, the residue constantly tends to fall, but it is stopped by the pipe stepped portion 11 (section a in FIG. 2A) and does not slide down.

Next, another embodiment of the present invention will be described based on FIG.

In FIG. 3A, components designated by the same reference numerals as those shown in FIG. 1 constitute the same components as those shown in FIG. 1, and detailed explanations thereof will be omitted here.

In this embodiment, the squeezing process and the conveyance process are separated as a conveyance path, and the hydraulic cylinder 3
is used only for pressing. The dewatered residue from the first conveying pipe 4 is once transferred to the second conveying pipe 5, which is located at a position offset from the first conveying pipe 4 but has the same slope angle. The dewatered residue transferred to the second transfer pipe 5 is pushed up by the pressing force of the transfer hydraulic cylinder 10 to the third transfer pipe 6 and fourth transfer pipe 7, which have larger diameters, and is stored in the incinerator. Sent to Hoppa 8. The hydraulic cylinder 10 is,
Simultaneously with the hydraulic cylinder 3, it receives hydraulic pressure from the hydraulic unit 1 and is controlled.

The transfer from the squeezing process to the conveyance process in FIG. 3A is an open type, but instead, as shown in FIG. It can also be moved.

Further, in the transport path, a hydraulic mechanism is provided for each transport pipe or for each transport pipe group to increase the force for pushing up the residue and to transport it to a higher location.

〔Effect of the invention〕

Since the present invention is configured as described above, it has the following effects. That is, since the sludge carrying machine according to the present invention uses an extrusion mechanism for squeezing and transporting the sludge, it can be configured to have a simple structure for compressing and transporting the sludge. Since most or all of the processes of squeezing and conveyance are performed within the piping, the odor of the residue does not leak into the surrounding environment, and the residue does not come into contact with the eyes of workers and the like. Further, since the extrusion mechanism does not require frequent adjustment or maintenance, it can be operated continuously for a relatively long period of time. Furthermore, since the extrusion mechanism operates under high hydraulic pressure, it contains water and the water content of the residue can be significantly reduced. Further, since the conveying path does not include any connecting and sliding parts, noise during the residue conveying process can be almost completely eliminated. In addition, the diameter of the conveyor piping in the conveyor path is gradually expanded from bottom to top, so that the dehydrated residue that tends to slip down inside the piping when the residue is transported is removed by connecting the piping. Since it can be stopped at the stepped part formed in the part, the dehydrated residue can be smoothly lifted to a high place.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing an embodiment of the sludge carrying machine according to the present invention in which the hydraulic mechanism is composed of one hydraulic cylinder, and Figs. FIG. 3A is a schematic view showing another embodiment of the sludge transporting machine according to the present invention, and FIG. FIG. 7 is a schematic diagram showing still another embodiment of the present invention showing another form of a connection part in a conveyance process. 1...Hydraulic unit, 2...Residue input chute, 3, 10...Hydraulic cylinder, 4, 5, 6, 7
...Conveyance piping, 8...Residue storage hopper, 9...Desorbed liquid collection gutter, 11...Step portion.

Claims (1)

[Scope of Claims] 1. The residue separated by a screen or the like is transported to a storage hopper located at a high place or a next-stage processing machine such as an incinerator. It is composed of a residue extrusion mechanism and a plurality of straight pipes with an upward slope, and the diameter of the straight pipe located above is formed to be gradually larger than that of the straight pipe located below, and the connecting portion of the straight pipe is A sludge transporting machine characterized by forming a stepped portion. 2. According to claim 1, the sludge extrusion mechanism includes two cylinders, the former cylinder compresses and dehydrates the sludge, and the latter cylinder presses and transports the dehydrated sludge. Rice residue transport machine. 3. The sludge transporting machine according to claim 1, wherein the sludge extrusion mechanism includes one cylinder, and presses and dehydrates the sludge and simultaneously pushes and transports the sludge. 4. The sludge transporting machine according to claim 1, wherein the transport path is formed by interposing a bent pipe between the sludge extrusion mechanism and an upwardly inclined straight pipe.