JPH0111316Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a mobile sludge treatment technology used for cleaning work of sewage ditches, culverts, etc.

BACKGROUND OF THE INVENTION In recent years, water supply and sewerage systems have been developed even in local cities, and each city has to manage them, and the total length of the sewerage systems has reached a considerable length. Particularly in the case of sewerage systems, if regular maintenance and management are not done, sludge in excess of the designed value will settle in drains, culverts, etc., impeding the drainage function, so it is recommended to install a mobile sludge treatment device. , sewage ditches, culverts, etc. are constantly cleaned and maintained. Conventionally, the above-mentioned device is equipped with a tank for collecting sludge, etc. on a truck-type loading platform, and a vacuum pump is attached to the tank.
After attaching the hose and transporting the tank by car to a location close to the site, and parking it at the limit point that a car can approach,
Extend the hose and insert its inlet into the required part of the sewage ditch, culvert, etc., and use the car engine as the power source to turn the pump to suck out the sewage that overflows into the ditch and store the settled sludge in the tank. I try to do that. A system was operated in which the sludge and other substances pumped up as described above were transported by automobiles to a communal sewage treatment facility where they were treated all at once.

However, constructing a joint treatment facility requires the acquisition of a large area for pollution prevention measures, which increases the amount of public investment, and at the same time, it has become the subject of protests by local residents as a source of foul odors. It is becoming increasingly difficult to allocate suitable land due to various reasons.

Therefore, there is currently a demand for processing of sludge and the like generated during cleaning of sewage ditches, culverts, etc., on-site as much as possible, rather than having to centrally treat the sludge in one place.

Purpose This invention improves the conventional equipment, which was only intended to transport sludge generated by cleaning sewage ditches, culverts, etc., to a joint treatment facility, and incorporates a mobile simple sludge dewatering machine into it. The sludge, etc. that is pumped up once is separated into sewage and sludge on site, and the volume of the solid sludge obtained is reduced and stored and packaged in waterproof bags for easy handling and transportation. On the other hand, the separated water can be returned to the sewers, culverts, etc. on the spot, thereby solving the above difficulties and meeting the needs of the local community. The purpose is to provide an expression processing device.

The device is equipped with a traveling device and can be moved to any area as needed, and the power for sludge treatment is taken from the built-in engine, so it can be used in places where there is no expectation of electricity supply. It is possible to demonstrate its functions.

Configuration The device of the present invention includes a prime mover, a transmission capable of switching power transmission between the traveling device side and the hydraulic pump side, and a tank facility mounted on the traveling device and partitioning the inside into at least two or more mesh plates. , a stirring blade driven by a hydraulic motor installed at the bottom of one compartment of the tank; a hose with a screw-type pump driven by another hydraulic motor for feeding sludge, etc. into and out of each compartment of the tank; A centrifugal dewatering cage installed in parallel with the tank equipment and driven at high speed by another hydraulic motor, a sludge scraping arm that is close to the inside of the cage and rotatable along the inner wall of the cage, and a sludge scraping arm that is fixed to the same arm and is concentric with the cage. A centrifugal system consisting of a brake disc that rotates, a hydraulic brake that brakes and releases the disc, a roller bearing that supports the outer circumference of the lower part of the dewatering basket at at least three places, and a pipe that introduces sludge, etc. into the centrifugal dewatering basket. A case with a drain port that houses the entire dewatering mechanism, a hydraulically operated opening/closing lid that opens and closes the sludge discharge port of the case that communicates with the open bottom of the basket, a hydraulic pump, each of the above-mentioned hydraulic motors, and a hydraulic mechanism. A mobile simple sludge dewatering machine consisting of a connecting oil pipe and a control valve that allows the piping system to be opened, closed, and switched as necessary.

One embodiment of the present invention will now be described with reference to the drawings. FIG. 1 is a schematic side view of the mobile sludge treatment device of the present invention. In the drawing, 1 indicates the treatment device moving means, that is, the truck body as a whole, 11 is the engine section, 12 is the driver's seat, A control system for vehicle running direction and control means for operating the processing equipment are provided. 13 is the wheel, 14
is the loading platform, 15 is the transmission with PTO, 2
1 is a hydraulic pump, 22 is a hydraulic motor for driving a peat pump, 23 is a hydraulic motor for driving a stirring blade, 24 is a hydraulic motor for rotating a centrifugal dewatering basket, 25 is a hydraulic mechanism for controlling a brake disc brake pad, and 26 is a hydraulic motor for driving a case. This is a hydraulic mechanism for operating the sludge discharge port opening/closing lid, and both are fixed to the loading platform 14 via the frame of the device.

Reference numeral 3 denotes stirring tank equipment, including a tank body 31 and a peat pump 32 driven by a hydraulic motor 22, which is connected to a hose 33 and pumps the contents from another tank for pumping sewage, etc. to the tank 31. 34 is installed at the bottom center of the tank body to transfer the waste water, etc. after mixing and stirring the flocculant in the same tank to the centrifugal dewatering mechanism 5 side. A stirring blade is driven and rotated by a hydraulic motor 23 attached to the top of the tank 31, and after adding a flocculant to the sewage etc. stored in the tank 31 at a weight ratio of about 2%, the mixture is evenly mixed. Stir the mixture in the wastewater to ensure sufficient flocculation.

Reference numeral 5 denotes a centrifugal dehydration means installed alongside the stirring tank equipment 3 , and the dewatering means accommodates a centrifugal dewatering basket rotated at high speed by a hydraulic motor 24, a sludge scraping arm braked by a hydraulic mechanism 25, etc. It is composed of a case 54, a sludge discharge lid 59 opened and closed by a hydraulic mechanism 26, and other members, the details of which will be described later.

The above-mentioned hydraulic drive means is constituted by a hydraulic system shown in FIG. In the figure, 27 is an oil reservoir with a capacity of 100, and 21 is an oil pump with a rated pressure of 250 kg/cm ² and a maximum discharge rate of 170/min/2000 r.
pm and is driven by the engine 11 to supply pressure oil to the pipe 16. Pipe 16 and oil reservoir 27
The pipe 19 that communicates with the pipes 17 -1 , 17 -2 is connected to the pipes 17 _-1 , 17 _-2 via control valves 28 _-1 , 28 _{-2 ,} respectively.
... and pipes 18 _-1 and 18 _-2 are connected, and hydraulic motors 22, 23 and 24 and hydraulic mechanisms 25 and 26 are installed between the flow paths, respectively.

When the power transmission direction of the engine 11 is switched and the hydraulic pump 21 is driven, the pressure oil sent to the pipe 16 passes through the limit valve and leaks from the port P side to the port T side in the state shown in the second figure. The oil flows through the oil reservoir 27 and returns to the oil reservoir 27. If the control valve 28 _-1 is operated from this state to the left side, pressure oil is sent from port P to the pipe 17 _-1 side via port A, and the hydraulic motor 24 is rotated in the direction of the arrow to move the pressure oil to the pipe 17 -1 side. _-1 into port B
Flows from port T, pipe 19 to oil reservoir 27
Return to If the control valve _28-1 is moved all the way to the right, port P will communicate with port B and port A with port T, so the flow direction of the pressure oil will be opposite to the above. As a result, the rotation direction of the hydraulic motor 24 is reversed.

If the control valve _28-1 is stopped at the neutral position, communication with all ports is cut off, so that the rotation of the hydraulic motor 24 can be stopped. At this time, the driven bodies connected to the motor 24, that is, the centrifugal cage and the separated sludge, have a large moment of inertia.
Since the motor 24 does not stop immediately, it acts as a pump and sends out pressure oil, so a bypass/brake valve is connected between the pipes _17-1 and _18-1 .

The same applies when operating control valve _28-4(5) .
It is possible to control the hydraulic mechanism to change its direction of operation. However, this circuit does not necessarily require a bypass circuit.

Control valve 28 _-2(3) Hydraulic motors 22 and 23
In this case, the control method is the same as in the case described above.

The hydraulic motor 23 is for the rotating shaft of the stirring blade 34, and the required oil amount is 7.8 when the rotation speed is 1000 rpm.
/min, torque (max) 25Kg-m, the hydraulic motor 24 is for rotating the centrifugal dehydration cage, and the rotation speed is:
We use one with an output torque of 12 kg-m at a required oil volume of 81.2/min at 500 to 2000 r.pm.

FIG. 3 is a perspective view of the stirring tank equipment 3 installed in parallel with the centrifugal dewatering device 5. In the figure, 23 is a hydraulic motor for rotating the stirring blade 34 installed at the upper part of the tank body 31, and the tank body 31 is approximately The lower part is shaped like a boat bottom with a size of 1500 x 1500 x 1500 mm, and the inside is partitioned into three by mesh plates 35 and 36, and the central partition is equipped with a hydraulic motor 23, a rotating shaft, and a stirring blade 34. is provided.

An upwardly open container made of a coarse wire mesh is fitted into the first compartment, and by receiving the sludge, etc. transferred from the pumping tank via the peat pump 32, coarse dust mixed in the sludge, etc. is removed. Check for lumps, etc. When the amount of residue exceeds a predetermined amount, the wire mesh container is removed from the tank body, excess residue is removed, and then the container is inserted into the tank.

Approximately 2% (weight ratio) of a polymer flocculant, such as Evergrowth C-144 (trade name, manufactured by Ebara Inferco Co., Ltd.), is added to the sludge etc. stored in the tank 31, and the mixture is stirred by operating the control valve _28-3 . The hydraulic motor 23 is rotated to drive the agitating blades 34 to sufficiently agitate and mix the mixture to coagulate and separate the solids. As a result, fine sludge and the like that pass through the ultra-fine filter are aggregated in the paste-like material, which not only has a deodorizing effect but also facilitates subsequent separation operations. During this time, water that has been filtered out from the fluid such as sludge by the partition plate 36 made of an ultra-fine stainless steel mesh plate flows into the partition 39 side, and is drained from the drain port 40 provided at the bottom of the tank 31 to the outside, the sewer, the culvert, etc. We are trying to make it flow back into the water. Additionally, depending on the quality of the sludge, an oil coagulant or the like may be added. In this way, care is taken to increase treatment efficiency by separating water or solid components from sludge and the like as often as possible.

FIG. 4 shows a sectional view of a centrifugal dehydrator attached to the stirring tank equipment 3 , and 24 is a centrifugal dehydrator 52.
A hydraulic motor is used to drive the rotary shaft 51.
Share. Basket 5 with a diameter of 800mmφ x 500mm
The lower part of the cage 52 forms a drum shape with a reduced diameter, and its outer periphery is supported at three locations by rollers 53.
The sludge residue is passed through and rotates at high speed (2000r.pm).
Bearings are installed in such a way that vibrations are unlikely to occur even if the
55 is a sludge scraping arm that extends along the inner wall of the basket 52 and is rotatable close to the same wall; its upper end is fixed to each brake disc 55, and its lower end is pivotally supported by the rotating shaft 51. It is connected to the boss portion and is rotatably supported around an axis concentric with the cage 52.

Further, the brake disc 56 is provided so as to be braked and released by a hydraulic mechanism 25 with a brake pad installed in the dehydrator 5 .

Reference numeral 54 denotes a case/container for the dewatering machine, on the top of which a hydraulic motor 24, a sludge introduction pipe 57, and a braking hydraulic mechanism 25 are installed, and on the bottom a separated water outlet 60 and a bearing for the dewatering basket 52 are installed. Roller 5 for
3 is installed, and a sludge discharge port 58 is opened in the center thereof. The discharge port 58 is provided with a lid 59 that opens and closes the discharge port 58 using the hydraulic mechanism 26.

Therefore, the flocculant-containing sludge, etc. that has been thoroughly stirred and mixed in the tank 3 and has become paste-like, is passed through the introduction pipe 57 via the peat pump 32, while the control valve _28-1 is operated to open the dewatering basket. When rotated at high speed, the basket 52 rotates together with the scraping arm 55, separating the sludge introduced into the basket into sludge and water.The water is collected by the case 54, and the water is collected through the discharge port provided at the bottom of the basket 52. 60 and return to the old sewage ditch or culvert. At this time, the dewatering basket shows the required dewatering rate from around 500r.pm, and 30% at around 2000rpm, depending on the quality of the sludge etc.
Dehydrate to a moderate moisture content.

When the sludge accumulates on the inside wall of the cage, it is preferable to stop the supply of sludge from the introduction pipe 57, operate the control valve _28-4 to operate the hydraulic mechanism 25, and brake the disc 56. A speed difference is generated between the sludge scraping arm 55 that is rotating together with the sludge scraping arm 52, and the arm 55 eventually functions to scrape off the sludge that has accumulated on the inner wall of the cage. The scraped sludge falls into the sludge discharge part provided at the bottom of the basket, and is passed through the sludge discharge port 5 of the case 54.
8. It is deposited on the lid 59 part. 800mmφ basket
After rotating at 2000rpm for about 5 minutes, the remaining sludge has been dehydrated to such an extent that it cannot hold its shape even if squeezed tightly, that is, it is at the level of wet sand (water content about 30%).

Prepare and place a waterproof bag on the tip of the lid 59, operate the control valve _28-5 , activate the hydraulic mechanism 26, and close the lid 5.
9 is opened and the accumulated dehydrated sludge is discharged and stored in a bag. By repeating the above operations as necessary, most of the moisture in the sludge can be returned to the sewage ditch or underdrain at the site, leaving behind a small volume of sludge, which is packaged in bags and easy to handle sludge bags. Cleaning of sewers, culverts, etc. can be completed with just one. Among the above, control valve 28 _-1 of the hydraulic circuit
_{, 2} . . . can of course be set at any position convenient for operation, such as the loading platform of an automobile, the driver's seat, or any other position.

Therefore, it is possible to avoid the uneconomical cost of transporting water that is not needed for cleaning and treatment to a joint treatment facility as in the past.

Effects According to the treatment device of the present invention, it can be moved to any place where a sludge pump can fit, and it dewaters sludge generated by cleaning sewers, culverts, etc. on-site.
The volume can be reduced and packaged for easier handling, and the separated water can be returned to old sewers, culverts, etc., so if a large number of such treatment devices are prepared, it will be easier to handle than the conventional large-scale treatment equipment. Not only does it replace a large-scale treatment facility, but it also has the advantage of eliminating the need to transport unnecessary water, making overall cleaning and management easier. Furthermore, depending on its quality, the dehydrated sludge can be recycled as various materials such as potting material for plant cultivation, mixed material for blocks, and aggregate for road paving.

Furthermore, for the administrative parties, it is possible to avoid problems such as difficulties in acquiring land for expanding sludge treatment facilities in the future and persuading local residents, and to meet the needs of local residents.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of the mobile simple sludge dehydrator of the present invention, Fig. 2 is a hydraulic system diagram thereof, Fig. 3 is a perspective view of the stirring tank equipment that constitutes the processing device, and Fig. 4 is , a schematic cross-sectional view of a centrifugal dewatering device for sludge, etc. is shown. 1...Vehicle body, 15...Mision with PTO, 2
1...Hydraulic pump, 22, 23 and 24...Hydraulic motor, 25 and 26...Hydraulic mechanism, 3 ...
Stirring tank section, 32... Screw type pump (peat pump), 34... Stirring blade, 5 ... Centrifugal dewatering device, 52... Dewatering basket, 53... Bearing roller, 55
...Sludge scraping arm, 56...Brake disc, 59
...Sludge outlet opening/closing lid.

Claims (1)

[Scope of utility model registration request] A prime mover, a transmission capable of switching power transmission between the traveling device side and the hydraulic pump side, tank equipment mounted on the traveling device and having the inside divided into at least two or more mesh plates, and one compartment of the tank. A stirring blade driven by a hydraulic motor installed at the inner bottom, a hose with a screw-type pump driven by another hydraulic motor for feeding sludge, etc. into each compartment of the tank, and a hose installed in parallel with the tank equipment. , a centrifugal dewatering cage driven at high speed by another hydraulic motor, a sludge scraping arm that is close to the inside of the cage and rotatable along the inner wall thereof, and a brake disc fixed to the arm and rotating concentrically with the cage; A centrifugal dewatering mechanism is entirely housed, which includes a hydraulically operated brake that brakes and releases the disk, roller bearings that support the lower outer periphery of the dewatering basket at at least three places, and a pipe that introduces sludge, etc. into the centrifugal dewatering basket. A case with a drainage port to open the sludge discharge port of the case that communicates with the open bottom of the basket.
A hydraulically operated opening/closing lid that closes, an oil feed pipe that connects the hydraulic pump and each of the above-mentioned hydraulic motors and hydraulic mechanisms;
A mobile simple sludge dehydrator comprising control valves that enable the piping system to be opened, closed, and switched as necessary.