JPS6118090B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a treatment method such as a fluidized incinerator or fluidized pyrolysis furnace for incinerating or thermally decomposing municipal waste, other waste, or loose materials (hereinafter referred to as waste). The present invention relates to a waste distribution and supply device for evenly distributing and supplying waste to a plurality of supply ports to equipment.

The amount of garbage has been increasing steadily in recent years.
Along with this, fluidized pyrolysis furnaces, fluidized incinerators, and the like (hereinafter simply referred to as "fluidized fluidized furnaces") for processing waste, etc., tend to gradually become larger. Looking at the process by which garbage is supplied to these fluidized bed furnaces, the collected garbage is first stored in a garbage pit, then crushed into pieces according to the required size and sent to a crushed garbage storage tank, and then further crushed garbage. It is transferred from the storage tank to a supply storage tank by a belt conveyor or a bucket conveyor, and is fed into the fluidized bed furnace from the lower part of this supply storage tank by a screw-type feeding mechanism or the like.

When supplying to the fluidized fluidized furnace, a material seal must be formed against the internal pressure of the fluidized fluidized furnace, and the supply rate must be stabilized to some extent. Furthermore, garbage, etc. must be uniformly dispersed into the fluidized fluidized furnace, and dispersion into the fluidized fluidized furnace becomes obstructed as the fluidized fluidized furnace becomes larger, so large fluidized fluidized furnaces are equipped with multiple supply ports. ,
When a single supply device supplies dust and the like to a plurality of supply ports, there is a drawback that the dust and the like are poorly dispersed within the supply device, making it impossible to provide a good supply.

Conventionally, this type of device has a single screw C twisted in one direction installed on a pair of feeders F and F installed on the left and right, as shown in Fig. 1, and installed in the hopper of each feeder. level switch LC
-1.The LC-2 was configured to control the distribution of garbage, etc. by rotating the screw forward and backward, but due to frequent repetition of forward and reverse rotation during operation, Shortened mechanical and electrical life and excessive transport capacity of the distribution conveyor (the transport capacity of the distribution conveyor is more than twice the transport volume of the previous stage conveyor, and the transport volume of the front stage conveyor is equal to or less than the supply capacity of the feeder duplex) Therefore, the transportation capacity of the distribution conveyor is more than four times that of a single feeder). It was impossible to store anything like that. Therefore, a separate storage tank D was required to provide a cushion for intermittent input of waste by cranes, etc., and the sequence to absorb fluctuations in transportation capacity due to changes in waste quality, etc., was complicated. .

The present invention aims to accurately eliminate these conventional drawbacks by ensuring good dispersion of dust, etc. inside the supply storage tank, preventing bridging, and ensuring a material seal that does not cause gas blow-through. The object of the present invention is to provide a waste distribution and supply device that enables stable distribution and supply of waste, etc., into a fluidized bed furnace.

The present invention includes three sets of feeders that supply garbage such as municipal waste, separated from each other, and one distribution conveyor that distributes and supplies garbage to each of the feeders, and the distribution conveyor has (a ) are provided parallel to each other, (b) are supported so as to rotate in opposite directions, (c) each screw is provided with blades extending from near the center toward both ends and having blades twisted in opposite directions, (d ) The blades of each screw are configured so that the transport capacity of the blades is 100% or more on one side from near the center and less than 100% on the other side of the transport capacity of the feeder group, (e) The screws are arranged in opposite directions with respect to their blade transport capacity, and in the portion where both screws face each other, (i) the blades of each screw are twisted in opposite directions, and (ii) the blade transport capacity is Regarding the transportation capacity of the above feeder group, one has more than 100%, the other has more than 100%.
It is configured to be less than 100%.

This is a garbage distribution and supply device characterized by comprising a pair of screws having the following configuration.

That is, regarding the transport capacity of the blades of each part of the two screws, for example, if the two screws are arranged to extend in the left and right direction, the transport capacity of the feeder group is
When set to 100%, the transport capacity of the left half of the first screw is 100% or more,
The transport capacity of the right half blade is less than 100%, preferably about 20 to 50%, and the transport capacity is varied in the left and right directions. On the other hand, the second screen
Deploy the same thing as the screw in the opposite direction. That is, the second screw is configured such that the transport capacity of the left half blade is less than 100%, preferably about 20 to 50%, and the transport capacity of the right half blade is 100% or more.

With this configuration, for example, if the capacity of the larger blade is 100% and the capacity of the smaller blade is 50%, (A) When the first screw and the second screw are rotated together, ...leftward 100 + 50 = 150 % Right direction 50 + 100 = 150%, and the same transportation capacity exceeding 100% can be obtained in both directions.

(B) If only the first screw is stopped, ...Left direction 0 + 50 = 50% Right direction 0 + 100 = 100% (C) If only the second screw is stopped, ...Left direction 100 + 0 = 100% Right direction 50 + 0 = 50%. That is, by selecting which screws to stop (or drive), the transport capacity in the left and right directions can be adjusted, and the transport capacity can be reduced to less than 100% in either the left or right direction.

Moreover, the garbage falls to the center feeder under its own weight, so that it is always operated in a full state.

An embodiment of the present invention will be described with reference to FIGS. 4 to 6. Two feeders 1, 2, and 20 each connected to the supply port of the incinerator body 10 incinerate one set of garbage, etc. It is a feeding device for the furnace main body 10, and has distribution screws 5, 6 arranged so as to connect the hoppers 3, 4 installed on these feeders 1, 2, and 20 at both ends, and with the hopper 21 located in the center.
are arranged parallel to each other to form a distribution conveyor. The screw blades 5' and 6' of the distribution screws 5 and 6 have a missing blade part near the center, and the left and right sides of the screw blades 5' and 6' are twisted in opposite directions, so that the garbage thrown in near the center is It is now possible to transport by distributing it to the left and right.

When the transport capacity of feeders 1, 2, and 20 is 100%, the left half blade 5' of one screw 5
The pitch of the blades is changed so that the transport capacity of the blade 5' is 100%, and the transport capacity of the right half blade 5' is 20 to 50%.The other screw 6 has a structure similar to that of the screw 5 arranged in reverse. The pitch of the blades is changed so that the transport capacity of the left half blade 6' is 20 to 50%, and the transport capacity of the right half blade 6' is 100%.

If you operate Screw 5 and 6 together, you can get 120-150% of the transportation capacity on both the left and right sides, and if you stop Screw 5 alone, you can move 20-50% to the left and 20 to 50% to the right.
100% transport capacity is obtained, and if only Screw 6 is stopped, 100% transport capacity can be obtained in the left direction and 20-50% transport capacity in the right direction.

The distribution screws 5 and 6 constituting the distribution conveyor are rotatably housed in a container 9 which has a crushed waste inlet 8 formed in the center and can store garbage. It is best to arrange it so that it can be loaded directly by crane from a machine or pit. Additionally, level switches LC-1 and LC-2 are installed above the hoppers 3 and 4 so that their positions can be adjusted as necessary to detect the level of the dust layer and stop the drivers 15 and 16 of the distribution screws 5 and 6. Equipped with communication equipment to control start-up. For example, it is possible to drive and stop a distribution screw with a transport capacity of 100% or more, or to control the deceleration of both.

In the figure, 11 is a feeder drive mechanism, 12 is a frame, 13 is a guide partition wall, and 14 is a bearing. The partition wall 13 is not provided above the hoppers 3, 4 and 21.

Note that the distribution screws 5 and 6 are assembled so as to rotate in opposite directions. Further, the screws 5 and 6 have at least screw blades 5',
A screw shaft in which the screw blade 6' is omitted is used, and if necessary, the screw shaft portions located above the feeders 1 and 2 at both ends may also be provided with no screw blades 5' and 6'.

As a result, the garbage thrown in by the preceding conveyor (not shown) falls and accumulates near the center of the distribution screws 5, 6, and as the distribution screws 5, 6 are driven, the garbage is transferred to the hoppers 3, 4 on the left and right feeders. transported to. At the same time that garbage starts to accumulate in the hoppers 3 and 4, the feeders 1 and 2 are driven to supply a fixed amount of garbage into the incinerator main body 10. Since the garbage in the feeders 3 and 4 cannot be emptied, the transport volume of the distribution screws 5 and 6 is larger than that of the feeders 1 and 2.
The amount transported by the feeder is 100% or more (preferably about 120 to 150%) of the amount transported by the feeder, and the garbage layer in the hoppers 3 and 4 gradually becomes higher. Level switches LC-1 and LC-2 are installed in the distribution screws 5 and 6, and the level switches detect which garbage layer has risen first.

For example, if the level switch LC-1 of the hopper 3 detects this, the distribution screw 5 is stopped. At this time, the distribution screw 6 continues to operate, so 20 to 50% of the distribution goes to the hopper 3 side, and hopper 4
This means that we are supplying 100% to the side. Therefore, the height of the garbage layer in the hopper 4 hardly changes, and the height of the garbage layer in the hopper 3 gradually decreases. here,
After the level switch LC-1 detects and the distribution screw 5 is stopped, the time for the height of the garbage layer to decrease by a certain volume of the hopper 3 is counted, and after a certain period of time has elapsed, the distribution screw 5 is started again. By operating the distribution screws 5 and 6, the hoppers 3 and 4 are supplied with 120 to 150% of the transport capacity as at the beginning, and the height of the waste layer increases. Next hoppa 4
The side level switch LC-2 detects this and stops the distribution screw 6.

The same process is repeated thereafter, and the garbage layers in hoppers 3 and 4 are not emptied or consolidated, and the operation is extremely stable without being affected by fluctuations in the amount of transport due to changes in the quality of the garbage. It becomes possible.

Furthermore, since the distribution screws 5 and 6 do not need to be repeatedly rotated in forward and reverse directions, it is possible to accumulate a considerable amount of waste on the screws. Therefore, by covering the distribution screw with a rectangular container, a considerable amount of garbage can be stored as shown in the garbage layer 7 in FIG. During cutting, excessive horsepower is not required due to the shearing resistance caused by the cut-out waste and the resistance of the storage tank wall on the cutting surface, and there is no consolidation of waste, so the storage tank has low horsepower and no mechanical trouble. It can be used as In addition, the feeder 20 is located in the center between the feeders 1 and 2, and the garbage falls under its own weight at the hopper 21, and is always operated in a full state, allowing for efficient distribution of the garbage supply and the amount of work to be distributed to both sides. It is possible to greatly improve work efficiency by reducing the

Incidentally, even if the screw blades 5', 6' are provided in the central part of the screw blades 5, 6 located above the feeder 20, the garbage accumulated thereon will be removed by the screw blades 5', 6. ' falls downward through gaps between themselves, each other, and the inner wall of the container 9, and is supplied to the hopper 21. However, in the case where large pieces of dirt are mixed in, it is preferable that the screw blades 5' and 6' are missing in this portion.

In this embodiment, in a distribution conveyor that distributes garbage almost evenly in both left and right directions, this conveyor is two screw-type conveyors, each of which is twisted in opposite directions in the left and right directions from approximately the center, and one changes the transport capacity in the left and right direction by setting it to 100% (or more than 100%) in the left direction and 0 to 100% (preferably about 20 to 50%) in the right direction, and the other one is the opposite left and right to the above one. (i.e. from 0 to 100 towards the left)
(100% in the right direction) By installing these two screws in parallel, the transport capacity in both left and right directions is the same for a set of two screws, which is 100 to 200% (preferably 120 to 150%), and detects the level of the upper hopper on each feeder on the left and right side, and stops the 100% screw on the detected side, thereby shortening the life of machines and electrical equipment due to frequent repetition of forward and reverse rotation. This enables stable operation, and although there are only two screws on the distribution conveyor, two screws can reduce the transport volume of 100 to 200 of the transport volume of one feeder set.
% (preferably 120 to 150%), and the waste is fed from the feeder located in the center by its own weight, making it efficient and economical with low rotation and low horsepower, and no reduction in transport efficiency. Not only can it be disposed of at a low cost, but the level switch detection at the hopper level above the feeder allows for a simple sequence of turning the screw ON and OFF, making it possible to greatly reduce equipment costs.Furthermore, it is effective as a storage tank because there is no problem with debris getting stuck. In addition, when used as a storage tank, there is no excessive resistance when cutting out the garbage, so the horsepower required is just for transportation, and it has the advantage that it can be used as a distribution and storage tank with very low horsepower. It distributes the amount of waste commensurate with the continuous operation of the system, suppressing the gas blow-through phenomenon, and also makes it possible to easily adjust the operation in response to changes in the quality of the waste, resulting in stable operation without causing excessive compaction or depopulation. Processing efficiency is significantly improved, and with the addition of a garbage loosening function, the operating conditions are favorable and post-processing such as incineration is possible at an economical cost without any management problems.

According to the present invention, the transport capacity in the left and right directions can be changed without rotating the screw in the forward or reverse direction.
Distribute the appropriate amount to each feeder to ensure material sealing action at each feeder,
It also prevents damage to various parts caused by frequent forward and reverse rotations.
It is possible to provide a garbage distribution and supply device that prevents transported objects from getting caught and can be used as a storage tank.

[Brief explanation of the drawing]

Fig. 1 is a system explanatory diagram of a conventional example, Fig. 2 is a longitudinal sectional view of its distribution conveyor section, Fig. 3 is a longitudinal sectional view of its feeder section, and Fig. 4 is a partially cutaway diagram showing an embodiment of the present invention. A vertical cross-sectional view, Fig. 5 is a cutaway plan view, and Fig. 6 is a longitudinal sectional view.
The figure is a sectional view taken along the line of FIG. 1, 2, 20... feeder, 3, 4, 21...
Hopper, 5, 6... Screw, 5', 6'... Screw blade, 7... Garbage layer, 8... Garbage inlet, 9... Container, 10... Incinerator body, 11...
Feeder drive mechanism, 12... Frame, 13...
Partition wall, 14... Bearing, 15, 16... Drive machine.

Claims (1)

[Scope of Claims] 1. Three sets of feeders for supplying garbage such as municipal waste are provided in isolation from each other, and one distribution conveyor is provided for distributing and supplying garbage to each of the feeders, and the distribution conveyor is , the following (a), (b), (c), (d) and
A garbage distribution and supply device characterized by comprising a pair of screws having the configuration of (e). (a) are arranged parallel to each other, (b) are supported so as to rotate in opposite directions, and (c) each screw is provided with blades extending from near the center toward both ends and having wings twisted in opposite directions, (d) The blades of each screw are configured so that the transport capacity of the blades is 100% or more on one side from near the center and less than 100% on the other side of the transport capacity of the feeder group, e) The screws are arranged oppositely to each other with respect to the transport capacity of the blades, and in the part where the screws face each other, (i) the blades of each screw are twisted in opposite directions, and (ii) the transport capacity of the blades is is 100% or more of the transport capacity of the feeder group, and the other is
It is configured to be less than 100%. 2. The device according to claim 1, wherein the screw blade is missing directly above a central feeder of the feeders.