JPS6331901A - Treating facility for municipal waste such as dust - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to equipment for treating urban waste such as garbage.

[Prior Art] Currently, the collected waste is incinerated in a garbage incineration facility or disposed of in a landfill.

[Problems to be Solved by the Invention] In the conventional waste treatment method, an incinerator is required, and the amount of waste is larger than that which can be handled by the existing waste incineration equipment. If the amount of waste increases, additional waste incineration equipment will have to be installed. However, when constructing a new garbage incineration facility, it is necessary to secure land for the garbage incinerator, and also to deal with pollution problems related to smoke exhaust, drainage, etc., and to avoid problems such as public sentiment. do not have. Therefore, it is not easy to install new garbage incineration facilities.

In addition, the method of transporting waste to a nearby landfill and dumping it is fine if the landfill is nearby, but if there is no nearby landfill, the waste must be transported far away, resulting in transportation costs. It is bulky and increases processing cost. Furthermore, when dumping on beaches or lakeshores, problems such as water pollution and compensation for fishing rights cannot be avoided.

Furthermore, in cities adjacent to the coast, there is a method of transporting waste by sea using barges.

This method has been used for a long time as offshore dumping, but recently it is no longer allowed due to seawater and underwater pollution problems, so in the end, waste disposal by barges has to be carried out in distant landfills or on the coast. The final waste treatment is no different from the treatment method described above, except that the waste is transported to the garbage incineration facility.

In view of the above-mentioned circumstances, the present invention aims to make it possible to process municipal waste without securing a disposal site such as a land waste incineration facility or a landfill.

[Means for Solving the Problems] The present invention provides a waste treatment plant offshore, a barge that shuttles between the treatment plant and the land-side quay, and a garbage truck is mounted on the barge from the quay. The present invention is characterized in that either the waste treatment plant or the barge is provided with a device for scooping out waste and the like from the barge.

[Operation] Garbage, etc. disposed of in each municipality is collected by garbage trucks, which transport the garbage to the quay and transfer it to a barge. The barge will transport the garbage offshore to Garbage Treatment Plan I and deliver it to the garbage treatment plant, which will process this garbage.

[Example] The present invention will be described in detail below with reference to the drawings.

First, an outline will be explained with reference to FIG.

General household garbage 1 and industrial waste 2 discharged in City A are collected by a garbage truck 3 and then transported to a pier 4 provided on a quay. A barge 5 for transporting garbage is waiting at the pier 4, and garbage 11 and waste 2 are transferred onto the barge 5 by a garbage truck 3. The collection volume of garbage etc. of barge 5 is
This should be about 2 to 3 days worth of trash from small and medium-sized cities.

Similarly, general household garbage and waste discharged in B town and C village are similarly collected by garbage trucks, transported to pier 4, and transferred to barge 5.

When the barge is full of garbage, it is towed one or more barges by a tugboat or the like to a waste treatment plant 6 located several tens of kilometers offshore. At the barge docking point of the waste treatment plant 6, a receiving device such as a belt conveyor is installed for receiving garbage, etc., and the garbage is transferred from the barge 5 to the receiving device using necessary means such as a crane. etc. are transported to the processing line of the waste treatment plant.

When the transfer of garbage and the like is completed and the barge 5 is emptied, it is again towed by a tugboat or the like and docked at the pier 4.

Next, the barge 5 used in the above equipment will be explained using FIG. 2.

The barge 5 has a hopper 7 in its center that is a storage space for garbage, etc. A conveyor 8 is installed at the bottom of the hopper 7, and the other end of the conveyor 8 is raised up and bent toward the stern. It is forced to protrude out of the ship. A chute 9 is provided at the projecting end of the conveyor. Movable bar F on the bow side of barge 5
JlO will be set up, garbage truck 3 or fixed pier 1 from quay 11
2. It is designed so that it can be transferred to the bow side plate of the barn 5 via the movable pier 10.

In the figure, 13 is a dustproof cover.

Also, one example of a waste treatment plant will be explained.

Since the waste treatment plant 6 is huge, it is installed on a large ship or marine rig platform, and as mentioned above, it is moored or moored offshore several tens of kilometers from the coast.

In FIG. 3, reference numeral 19 denotes a side for coming alongside the barge, and a garbage conveyor 18 is provided extending from the side 19 to the garbage input pit 20. A front-stage crusher 21 is provided adjacent to the garbage input pit 20, and a delivery conveyor 22 is provided between the front-stage crusher 21 and the garbage official bit 20. An 0-cli dryer 23 is provided downstream of the pre-stage crusher 8!21, and a belt conveyor 24 is provided downstream from the outlet of the low cli dryer 23, and a magnetic separator 25 is installed above the terminal end of the belt conveyor 24. establish. Further, a rear crusher 26 is provided below the terminal end of the belt conveyor 24, and the rear crusher 26
A non-magnetic material sorter 27 is disposed on the exit side of the pipe 6, and a vibration sorter 28 is disposed further downstream. A press molding machine 29 is installed in the final step of garbage disposal.

All the devices described above are sealed by a cover 30, and an exhaust gas treatment device 31 is connected to the cover 30.

Further details will be explained.

The input pit 20 has a watertight structure capable of storing water, and its upper part is surrounded by an enclosure 33, and the population of the enclosure 33 is blocked off by an air curtain 34. In addition, an inclined surface 35 is provided at the boundary between the gunwale 19 and the garbage input pit 20, and the loading conveyor 1
To allow the garbage thrown in from 8 to fall into a garbage input pit 20 without getting caught on the way. A discharging conveyor 22 is provided so as to span between the front crusher 21 adjacent to the garbage input pit 20 and the bottom part 36 of the garbage input pit 20.

The unloading conveyor 22 is constructed by wrapping a flexible member 41 provided with fins 40 at a required pitch around rollers 311 and 39 disposed at the bottom 36 and above the socket 37 of the front crusher, respectively. The entire conveyor 22 is housed in a watertight cover 42, and a chute 43 connected to the socket 37 is provided at the end of the cover 42.

The pre-stage crusher 21 is a twin-barrel type crusher and has the following configuration.

Two rollers 44 and 45 are provided facing each other so as to rotate around parallel axes, and the rotating shaft 46 of one of the rollers 45 is supported so that its position is fixed, and a driven sprocket is attached to one end of the rotating shaft 46. 47, and a drive sprocket (
(not shown).

The rotating ring 48 of the other roller 45 is supported so as to be able to move toward and away from the opposing rotating shaft, and its bearing 49 is biased toward the approaching side with a required force by a spring 50. A driven sprocket (not shown) rotated in the opposite direction by the chain to the driving sprocket is fitted onto the other end of the rotating shaft 48.

A crushing motor 51 is provided close to the roller 44, and a sprocket 52 fixed to the output shaft of the motor 51 and the driven sprocket 47 are connected by a chain 53. Note that both rollers 44 and 45 may be directly driven by individual motors, or only one may be driven and the other may be used as an idler.

Further, a large number of protrusions are provided on the outer peripheral surfaces of both the rollers 44 and 45, so that the dust that is pressed between the rollers 44 and 45 is crushed by the large number of protrusions. The shape of the protrusions and the distance between the protrusions are larger than those of the later-described crusher, and the crushed pieces are coarse and relatively large.

A chute 43 is provided between the rotary dryer 23 and the front crusher 21, and the garbage crushed by the chute 43 is sent to the front crusher 21 together with water contained in the garbage and washing water.
be led to.

Guide rings 55, 55 are fixed to both ends of the rotary drum 54 of the rotary dryer 23, and gears 57 are fixed to predetermined positions on the rotary drum 54. Said guide ring 55.
Support rollers 5B, 5B are in rolling contact with 55, and rotatably support the rotary cylinder 54. Reference numeral 58 denotes a motor for driving the rotary cylinder, a reducer 59 is connected to the motor 58, and a binion gear 60 is fixed to the output shaft of the reducer 59.
meshes with the gear 57. Also, rotary dryer 23
is equipped with a hot air generating furnace 61 and an exhaust gas circulation blower 62, and the hot air generating furnace 61 generates combustion gas for drying garbage.
The combustion gas is forced into the rotary dryer 23 by an exhaust gas circulation blower 62.

The magnetic separator 25 has a motor 66 that rotates a belt 65 that is wound around rollers 63 and 64 at both ends. It crosses over to form a magnetized zone 68, and directly above the magnetic single receiving box 67 is a non-magnetized zone 6.
9.

The rear crusher 26 installed below the end of the belt conveyor 24 has the same structure as the front crusher 21, but the spacing between the protrusions is smaller than that of the front crusher 21 so that the garbage can be crushed into finer pieces. be.

Non-magnetic metal sorter 27 installed downstream of the latter-stage crusher 26
The method applies a required vibration to the table 70 to make the crushed pieces fluid and generates a traveling magnetic field that acts in a direction perpendicular to the flow direction. A current is induced and a thrust perpendicular to the flow direction is applied to sort the objects falling to the side edge of the table, while non-conductive objects are caused to fall from the downstream end of the table by the flow induced by the vibrations.

As mentioned above, the vibration sorter 28 is disposed downstream of the non-magnetic metal sorter 27, and the sorting table 71 of the sorter 28 is lowered toward the downstream side, and the table surface has a side surface on the upstream side. The flexible sorting hairs are densely planted at an angle.

Therefore, the crushed pieces transferred onto the table 71 are vibrated by the table 71 and become fluid. Also, among the crushed pieces, relatively small and light pieces flow down along the slope of the table 71, while relatively large and heavy pieces are prevented from descending by the repulsive force of the sorting bristles, and are moved upstream by vibration. They are moved and sorted.

The dust finally sorted by the vibration sorter 28 is fed into a press molding machine 29. The press molding machine 29 compresses the waste into a nodule shape and injects it into a desired shape, for example, into a rod shape. The injected molded product is conveyed to a required location by a conveyor 72.

As described above, each of the devices arranged above is sealed with a cover 30, and a ventilation blower 7 is installed at a predetermined position of the cover 30.
3 will be provided. The air inside the cover sucked by the ventilation blower 73 is sent to the exhaust gas treatment device 31 via a cyclone dust collector 74 and an induced blower 75.

The gas that has flowed into the exhaust gas treatment device 31 is passed through the afterburner 76.
In the process of passing through the combustion chamber, combustible gas and combustible dust are burned and deodorized. Water cleaning nozzles 78 are installed at required positions in the ventilation passage in the exhaust gas treatment equipment.
are arranged as appropriate, and the cleaning water sucked up by the circulation pump 79 is spouted out from the nozzle 78. The exhaust gas is washed with water to remove harmful components and dust, and is then discharged along with water vapor from the flue. The sediment is sent to the garbage input pit 20 through a discharge line 80.

81 in the figure is a dryer exhaust gas circulation circuit, and a portion of the exhaust gas is branched from this circuit and guided to the exhaust gas treatment device 31.

Next, the flow of garbage disposal will be explained.

A barge 5 is berthed to a quay 11 and a movable pier 10 is spanned over the pier 4 so that a garbage truck 3 can be transferred from the quay 11 to the barge 5 via the pier 4 and the movable pier IO.

Garbage truck 3 loaded with garbage etc. is transferred onto barge 5,
The loaded garbage and the like are dropped into the hopper 7 and returned to the quay 11. When garbage is thrown into the hopper 7 from the garbage truck 3, a pile of garbage is formed on the bow side of the hopper 7, but a conveyor 8 is driven to move the pile of garbage sequentially to the stern side. The garbage thrown in by the operation of the conveyor 8 is evenly stacked in the hopper.

This transfer of garbage from the garbage truck 3 to the barge 5 is continued until the hopper 7 is full.

When the hopper 7 is full, the movable pier IO is raised and left the shore.

The barge 5 is towed to the waste treatment plant e by a tugboat (not shown) or the like. The barge 5 is brought alongside the side 19 of the waste treatment plant side as shown in FIG. The barge that has been completely transferred is towed by a tugboat or the like and returned to the quay 11.

Garbage and the like are thrown into the garbage input pit 20 by the carry-in conveyor 18, but the thrown garbage and the like slide down the slope 35 and accumulate at the bottom of the pit. Dust, odors, etc. generated during this garbage disposal work are blocked by the air curtain and do not leak outside.

At the bottom of the pit 36, water contained in the garbage and the like, or the above-mentioned cleaning water, is accumulated, and the delivery conveyor 22 scoops up and conveys the garbage together with this water. The front-stage crusher 21 crushes garbage and the like into a required size, and the water passes through as it is and is thrown into the rotary dryer 23. still,
In the front-stage crusher 21, garbage and the like are pinched by opposing rollers 44 and 45, and the protrusions break the garbage, so that the garbage and the like are effectively crushed. Also, if the circumferential speeds of the rollers 44 and 45 are changed, a tearing action will occur between the rollers 44 and 45.
The crushing effect is further increased, and since only compressive force acts on the protrusions under normal conditions, unlike crushing due to shearing, it is difficult to cause the blade to spill. Furthermore, when a large and solid lump that cannot be crushed by this crusher 2■ is introduced, the spring 50
is bent and the roller 45 moves in the direction of separation, and the rollers 44,
45 and protrusions from damage. The rotating body 54 is the motor 5
8, the crushed pieces move downstream while being reversed. The residence time of the crushed pieces is determined by the inclination angle and rotation speed of the rotating drum 54, and the inclination angle and rotation speed are set so that the crushed pieces are in an appropriate dry state in consideration of the amount of heat given from the hot air generating furnace 81.

Further, since the dust and the like are crushed into the required size in advance during this drying process, drying can be carried out efficiently.

Since drying in the low dryer 23 does not involve combustion, the temperature inside the furnace is at most 100° C. to 150° C., and the amount of heat required for good drying is small, and hardly any harmful gases are generated.

Exhaust gas (steam, odor, etc.) generated by the rotary dryer 23,
One part of the combustion gas (used for drying) is sent to the exhaust gas treatment device 31, and the remaining part is sent to the rotary dryer 23 again through the exhaust gas circulation blower 62.

Dust and the like dried to a predetermined state by the rotary dryer 23 are transferred to a magnetic separator 25 by a belt conveyor 24. The magnetic separator 25 attracts magnetic materials such as iron, moves the magnetic pieces to a receiving box 67, and removes them, thereby collecting the magnetic pieces. In addition, the remaining garbage etc. are thrown into the latter-stage crusher.

The latter-stage crusher 28 crushes garbage and the like into finer pieces.

Here, when a large foreign object is thrown in, one of the rollers escapes, as in the case of the front crusher.

The non-magnetic material sorter 27 uses the above-mentioned action to classify the materials into metals and non-metals, and the vibration sorter 28 further divides the materials into non-combustible materials such as dirt and glass, and combustible trash. Therefore, almost all the garbage and the like thrown into the press molding machine 29 are combustible.

The press molding machine 29 compresses combustible waste and the like into a mass, and injects the mass into a desired shape through a nozzle. If the injection shape is rod-shaped, later handling becomes easier. Injection molded materials are thoroughly dried flammable materials,
It can be used immediately as fuel. The molded product is carried out of the facility by a conveyor 72, but a portion can also be used as fuel for the drying oven. It goes without saying that an air curtain is provided at the outlet for molded products to isolate the inside and outside of the equipment.

Further, magnetic materials such as iron recovered by the magnetic separator 25 and metals such as aluminum recovered by the non-magnetic material separator 27 are reused.

The fuel molded by the press molding machine 29 can be supplied as fuel for ships towing barges such as tugboats, and can also be supplied as fuel for power generation in the waste treatment plant 6 and as fuel for the lH water supply system, making it self-sufficient. It becomes self-sufficient and the running cost of the entire system becomes extremely low.

Most of the garbage treated by the waste treatment plant is reused, and the gas discharged is clean and does not cause air pollution or ocean pollution.

In the above embodiment, the movable pier may be provided on the barge side or on the fixed pier side, and a grab crane may be used as the device for scooping out the garbage in the hopper. The device may be located at the waste treatment plant. Further, as shown in FIG. 4, the barge may carry a convoy 14 and transport it by a bushy boat 15, or the barge itself may be equipped with an outboard motor or the like so that it can propel itself.

In addition, in the waste treatment plant mentioned above, either the front-stage crusher or the rear-stage crusher may be omitted, and when there is no need to classify metals, the vibration sorter 28 may be used as the sorter. Alternatively, the crusher may be of a guillotine type or a shearing type with a set of rotary cutters, and it goes without saying that the sorter and dryer may also be of types other than those shown in the above embodiments.

Furthermore, it goes without saying that the waste includes sewage, Shobara treatment dehydrated cake, and the like.

[Effects of the Invention] As described above, according to the present invention, the following excellent effects are exhibited.

(+) It is possible to construct garbage treatment facilities even in areas where it is not possible to secure garbage treatment facilities or other landfill sites on land.

(i) Since the waste treatment plant is located sufficiently offshore, there will be no problems with neighboring residents regarding the construction and operation of the facility.

■On the ground side, all that is needed is a pier or quay, and there is no need to install any new equipment.

[Brief explanation of drawings]

Figure 1 is a block diagram showing an overview of the present invention, Figure 2 is an explanatory diagram showing the relationship between a barge and a quay, Figure 3 is a schematic diagram showing an example of a garbage treatment plant, and Figure 4 is a diagram of a barge transportation method. It is an explanatory view showing one example. 3 is a garbage truck, 5 is a barge, 6 is a waste treatment plant, 8 is a conveyor, and 11 is a quay.

Claims (1)

[Claims] 1) A garbage treatment plant is installed offshore, a barge is arranged to shuttle between the treatment plant and the land-side quay, and a garbage truck can enter the barge from the quay. A facility for processing urban waste such as garbage, characterized in that either one of the barges is provided with a device for scooping out garbage, etc. inside the barge.