KR101551476B1

KR101551476B1 - Method for manufacturing Solid Refuse Fuel having single crushing process

Info

Publication number: KR101551476B1
Application number: KR1020150086460A
Authority: KR
Inventors: 김장용
Original assignee: 주식회사 신텍
Priority date: 2015-06-18
Filing date: 2015-06-18
Publication date: 2015-09-09

Abstract

The present invention relates to a method for manufacturing a solid fuel having a single crushing process. The purpose of the present invention is to provide a manufacturing method of a solid fuel which reduces energy consumption and a content of incombustibles while increasing a calorific value of combustibles by omitting a crushing process in the beginning when selecting combustibles contained in the waste, and supplying incombustibles mixed in the combustibles to a crushing unit after multistage classification by using an air circulation wind gravity screening technology and a magnet. The present invention may include the steps of: selecting coarse combustibles by breaking a plastic bag surrounding the waste in a non-crushing manner; removing soils from the selected waste by using a vibrating hopper; increasing selection efficiency by removing a curtain phenomenon to transfer the waste in which soils are removed through a speed-adjustable transfer conveyor; classifying the discharged waste into incombustibles, heavyweight combustibles, and lightweight combustibles by a wind weight three-screening unit comprising both a multistage air conveyor and a cyclone for three-screening; and crushing the heavyweight and lightweight combustibles merged after being selected and discharged with a crusher.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for manufacturing a solid fuel having a single crushing process,

The present invention relates to a method of manufacturing a solid fuel having a single crushing process, and more particularly, to a method of manufacturing a solid fuel having a crushing process, And the incombustibles are broken together to reduce the quality of solid fuel production.

In general, waste disposal uses landfill or incineration methods. In the landfill method, it is difficult to acquire additional landfill sites and environmental problems, and the existing landfill has reached the end of its life. Also, Since additional construction is not easy, waste disposal is becoming a big social problem.

Recently, in order to solve such a problem, a variety of solid fuel (SRF: Solid Refuse Fuel / hereinafter referred to as "SRF") production method capable of selectively burning combustible materials including tires, vinyls and plastics contained in wastes to be landfilled or incinerated Technology is on the rise. This SRF manufacturing technology is a very desirable phenomenon in terms of resource recycling, with the advantage of reducing the amount of waste to be landfilled or incinerated.

Solid fuel is a resource that is similar to coal calorific value (4,000 ~ 5,000 ㎉ / ㎏) by improving the transportability, storage stability and combustion stability of waste synthetic resin, waste rubber and waste wood that were previously incinerated or buried. These solid fuels are made of high-calorific waste and generate uniform thermal power when incinerated. Therefore, they are widely used in private power plants and industrial boilers. They are also supplied by heating heat of general households in various district heating companies.

Korean Patent No. 10-0998800 (a method for producing mixed solid fuel of municipal solid waste and landfill waste through calorimetry), Korean Patent No. 10-1021754 (mixed solid fuel of municipal solid waste and landfill waste using a dryer) And Korean Patent No. 10-1270936 (a method for producing solid fuel of municipal solid waste and landfill waste using a dual drying system and a dual exhaust gas treatment system).

Korean Patent No. 10-0998800 discloses a method of solving the problem of the removal of the soil and the odor of resources such as high quality waste synthetic resins that can be recovered from the landfill waste and by simply burning the resources of the landfill waste, In presenting the means of aggressive recycling of the problem of passive energy recycling to be recovered, the characteristics of the process that can be linked to the conventional MBT process are provided, and the recycling resources of the landfill waste and municipal waste are integrated, The main purpose of the present invention is to provide a method for producing a solid fuel of high quality by mixing a recycled wastewater with a recycled wastewater, S-A1) PLC (Programmable Logic Controller) processing system that controls and monitors each process as a whole A first sorting step of separating the municipal waste brought in by the crushing and crushing of the municipal waste into a first crushing crusher, passing the crushed material through the first sorting device, and then separating the municipal waste combustible material; S-B1) a second sorting step of separating buried waste taken separately from the municipal wastes by a second crushing crusher, crushing the crushed waste, passing the crushed material through a second sorting device, and then separating the burnt waste combustible material.

Korean Patent No. 10-1021754 discloses a method for solving the problem of soil removal and odor problems of resources such as high quality waste synthetic resins that can be recovered from landfilled wastes, In presenting the means of aggressive recycling of the problem of passive energy recycling to be recovered, the characteristics of the process that can be linked to the conventional municipal waste MT process are prepared and the recycled resources of the landfill waste and municipal waste are integrated, The main purpose of the process is to integrate the recycling process of recycled waste in the MT process. The overall process of S-A1 is to control and monitor each process. The municipal waste is broken and crushed by the first crushing crusher by the process control of the PLC, A first sorting step of separating the municipal waste combustible material after passing through the separate device; S-B1) a second sorting step of separating buried waste taken separately from the municipal waste by crushing and crushing the buried waste with a second crushing crusher, passing the crushed material through a second sorting device, and then separating the burnt waste combustible material; S-C1) The water content measuring device of the screening mixture storage tank for temporarily storing the municipal waste combustible material and the landfill waste combustible material separated through the first sorting process and the second sorting process is controlled by the PLC, And when the water content of the mixed material is not more than 10%, it is supplied to the step S-C3), and when the water content is more than 10%, it is supplied to the third sorting device of the following step S-C2) And a control step.

Korean Patent No. 10-1270936 does not require a large-scale facility investment cost in producing solid fuel by using municipal waste combustible material, and it is energy-saving by effectively utilizing hot wind in a wind power sorter and securing equal quality of waste And a method for manufacturing a solid fuel of municipal solid waste and landfill waste by using a dual drying system and a double exhaust gas treatment system, which are improved in efficiency and economy in terms of energy consumption, ) The first sorting process is to carry out the municipal waste, break it with crusher, sort the crushing by the trommel screen, separate the incombustible metal by the magnetic separator, and selectively sort combustible waste by water line. ST-D1) The municipal waste and the landfill waste combustible material separated through the first sorting process (ST-C1) are separated by a wind-powered separator connected to a drying hot air fan and stored in a box. Or a flammable material having a water content of 25% or less; ST-C2) In order to produce an unformed RDF having a water content of 25% or less or a molded RDF having a water content of 10% or less by crushing a combustible material flowing through the first drying step (ST-D1) And a pulverizing step of pulverizing the mixture.

However, most of the SRF manufacturing technologies including the above-mentioned SRF manufacturing techniques are produced by crushing flammable materials with a primary crusher and then sorting the specific gravity of the wind or crushing the combustible materials with a secondary crusher to produce SRF of a size (50 mm or less) During the primary crushing process, productivity is lowered due to excessive consumption of the primary crusher due to incombustibles such as steel products and occurrence of breakdown. In the case of separating iron products using a magnet installed after the primary crusher, crushed steel products are mixed with combustible materials It is difficult to sort by being supplied, and the productivity is deteriorated due to the problem of re-classifying the flammable material again, and the incombustibles and combustibles are mixed to the final stage in many cases, thereby deteriorating the quality of SRF.

Also, there is a disadvantage that the recoverability of resources that can be recycled is low due to the low separation and sorting ability of combustibles contained in soil with high water content.

In addition, there is a disadvantage in terms of environmental pollution that countermeasures against fugitive dust and odor generated when flammable materials are sorted are small.

Korean Registered Patent Publication No. 10-0998800 (Nov. 30, 2010) Korean Registered Patent Publication No. 10-1021754 (Mar. 4, 2011) Patent Registration No. 10-1270936 (2013.05.29)

In order to solve the above problems, an object of the present invention is to provide a method of sorting incombustibles contained in buried or municipal wastes by omitting the crushing process in the early stage, So that only the pure combustible material is supplied to the crusher to reduce the energy consumption while reducing the content of the incombustible material and increasing the calorific value of the combustible material.

It is another object of the present invention to provide an air conveying apparatus and a method for separating a lightweight combustible material having a large size scattered from a cyclone, And a method for manufacturing an environmentally-friendly solid fuel which can suppress the generation of fugitive dust and odor while performing smooth selection of the specific gravity of the fuel.

In order to accomplish the above objects and to solve the conventional drawbacks of the present invention, the present invention provides a method of separating a plastic bag wrapped with an excavator equipped with a toothed trowel or wrapped with municipal waste by a non- A breaking step;

A waste sorting step of removing waste in the wastes sorted and broken by using a vibration hopper;

A high-speed conveyor conveying step of conveying the waste material from which the soil-free material has been removed at a high tilt angle through a speed-controlled conveying conveyor to prevent a curtain phenomenon overlapping between combustible materials and incombustible materials, thereby improving sorting efficiency;

The wastes discharged from the end of the speed-controlled conveying conveyor are sorted into incombustibles, heavy combustibles and lightweight combustibles while reducing scattering dust and odor through a multi-stage air conveyor and a cyclone separator for three-way selection. A step of selecting three wind power specific gravity;

And crushing the combined weighted combustibles and the lightweight combustibles with the crusher after the selective discharge to prepare a solid fuel having a predetermined size.

In a preferred embodiment of the present invention, in the step of selecting three wind power specific gravity, the heavy incombustibles among the wastes are dropped and discharged into the incombustible conveying conveyor at the bottom by the wind power at the end of the speed-controlled conveying conveyor, and the light combustibles are scattered, A first sorting step of flowing into the air conveyor;

A secondary sorting step of dropping the heavy combustibles among the selected combustible materials in the primary sorting step to the lower heavy combustible conveying conveyor by using a catching film provided at the end of the first air conveyor;

A third sorting step of letting the lightweight combustibles that have passed through the secondary sorting flow in the lateral direction of the cyclone selecting cyclone connected to the end of the second air conveyor and then downwardly rotating so as to drop and discharge the lightweight combustibles into the conveying conveyor .

In a preferred embodiment, the incombustible conveying conveyor and the heavy-matter conveying conveyor can be constructed such that the driving drum provided at the end portion is constituted by a permanent magnet drum to sort the iron products.

In a preferred embodiment, the multi-stage air conveyor is constituted by a tilted structure in which a first air conveyor and a second air conveyor, which are clogged with upper and left and right sides, are moved up so as to move air and combustibles scattered by wind force, The first lower conveying conveyor and the second lower conveying conveyor are spaced apart from each other by a predetermined distance at an upper portion of the open bottom of the conveyor and the second conveying conveyor Medium size can be configured to prevent the release of large, light flammable materials.

In a preferred embodiment, the first lower conveying conveyor is configured to be driven to rotate forward so as to discharge the heavy combustible material falling into the conveying conveyor, and the combustible discharged from the second conveying conveyor is heavy, And may be configured to be driven to rotate in reverse to be discharged by the conveying conveyor.

According to a preferred embodiment of the present invention, the latching membrane may be configured as a separable mounting type so that a plurality of the latching membranes are arranged in the width direction of the first air conveyor, and the position of the latching membrane is adjusted in the longitudinal direction of the first air conveyor.

According to a preferred embodiment of the present invention, the retaining film is configured such that the upper surface thereof is pressurized by the fastening means constituting the support member to prevent the release of the retaining film. The shape of the retaining film is large on the upper surface and narrow on the lower surface, It may be in the form of a chisel.

In a preferred embodiment, the cyclone selecting cyclone may be configured to include a wind power discharge pipe provided at the lower end of the speed-controlled conveying conveyor to provide wind power.

In the present invention, when the combustible material is selected from the landfill or municipal wastes, the initial combustible material and the nonflammable material are mixed, the nonfracturing type is selected, and the crushing is performed only for the combustible material subjected to the air circulation wind force specific gravity selection step It is possible to produce a high-quality solid fuel having a high combustible content and a low incombustible content,

Also, by simplifying the sorting process and equipment, it is possible to produce high quality solid fuel while reducing energy consumption,

In addition, by including a step of sorting air circulating wind force using air conveyor and cyclone capable of multi-stage classification, it is advantageous to solve the environmental pollution problem by removing fugitive dust and odor generated from combustibles from waste by circulating air It is a highly anticipated invention in the industry.

FIG. 1 is a view showing a process of manufacturing a solid fuel according to an embodiment of the present invention,
2 is a perspective view showing a solid fuel producing apparatus according to an embodiment of the present invention,
3 is a front view showing a solid fuel producing apparatus according to an embodiment of the present invention,
4 is a side view showing a solid fuel producing apparatus according to an embodiment of the present invention,
FIG. 5 is a plan view of a part of an apparatus for sorting wind specific gravity triangles provided with a latching membrane according to an embodiment of the present invention,
FIG. 6 is a cross-sectional side view of an apparatus for selecting a wind specific gravity triangle according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

2 is a perspective view showing a solid fuel producing apparatus according to an embodiment of the present invention. FIG. 3 is a cross-sectional view of a solid fuel producing apparatus according to an embodiment of the present invention. 4 is a side view showing a solid fuel producing apparatus according to an embodiment of the present invention. FIG. 5 is a sectional view of a solid fuel producing apparatus according to an embodiment of the present invention. And FIG. 6 is a side elevational cross-sectional view of an apparatus for selecting a specific gravity of three winds equipped with a latching membrane according to an embodiment of the present invention.

As shown in the figure, the present invention is a method for separating buried or municipal waste by a non-crushing method using an excavator (1) equipped with a tooth punch (101) S100).

When the waste sorting step is carried out in the initial treatment stage, the crude flammable material can not be crushed, so that it can be easily selected and can be directly input into the SRF manufacturing process without any unnecessary sorting process. Thus, It is efficient because only the remaining waste is selected.

In particular, since the incombustibles in the waste mixed with the combustible and incombustible materials are not crushed, the process of selecting the incombustible materials in the subsequent sorting process becomes much easier, thereby preventing the deterioration of the screening ability. That is, when the incombustible and combustible materials are crushed in the mixed state, the primary crusher may be excessively consumed or broken due to incombustibles such as steel products. In addition, when the crusher is operated in a state where the earth, A lot of energy is consumed and it is inefficient.

Meanwhile, the breaking rods used in performing the breaking and breaking are mounted on a bucket installed at an end of an arm of an excavator, or a bucket is removed from an end of an excavator arm, and the waste is shredded by a replaceable device. It is sufficient to have a sharpness enough to break the plastic bag of the weight-based plastic bag to take out the carried waste. Therefore, it is possible to construct various tooth shapes and connect them to the bucket, or to use it as a dedicated mount to be mounted directly on the end of the arm after removing the bucket.

One type of wave envelope can be configured to cover the middle three teeth among the teeth formed in the existing bucket and to connect the teeth of the long shape longer than 500 mm. In this type of coupling, the bucket is not removed but the existing bucket is covered with the tie. In the coupling, the existing tooth and the wave envelope can be connected to each other by using pins or the like, You may. It is sufficient that the above-described method for attaching the barbed tooth is provided so as to be capable of breaking with a tooth of various methods as an example.

Through a perforated network in which a plurality of holes having an arbitrary size are arranged so that the plastic bag is removed through the breaking and sorting and the buried or municipal waste from which coarse combustibles have been removed is put into the vibration hopper 2 and spread uniformly and evenly And a soil selection step (S200) for discharging and selecting the soil to the lower side.

The waste having been removed from the soil through the soil sorting step (S200) is elevated along a conveyor inclined at high speed through a speed-controlled conveying conveyor (3), and a load is generated using the weight and area difference between the waste according to the speed And a high-speed conveyor transfer step (S300) for preventing curtain phenomenon in which incombustibles and combustible materials are overlapped to increase the sorting efficiency.

Curtain phenomenon refers to a phenomenon in which flammable materials and incombustibles are overlapped and can not be sorted. When light incombustibles overlap, incombustibles are discharged to a combustible conveyor. When they are overlapped with heavy incombustibles, flammable materials are not sorted and discharged to incombustible conveying conveyors.

In the above description, the speed of the speed-adjustable conveyor is referred to as a high speed. This is not to say that the speed of the speed-adjustable conveyor is high. However, when waste composed of combustible materials and incombustibles supplied through the coarse incombustibles and the sorbent sorting process is being conveyed along the conveyor, This is the speed at which it can be selected. The speed value can be set at the speed at which the sorting effect can be obtained at the time of transporting, based on the kind or form of the supplied waste. That is, the high speed is not limited to a specific value but is a speed relatively higher than a conveying speed of a general waste conveying conveyor, and it may be adjusted according to a site condition or a speed may be set according to a waste type in advance.

Preferably, the motor that provides the driving force of the speed-adjustable conveyor is configured to adjust the speed using an inverter motor. As described above, when the waste is moved quickly by controlling the speed of the conveying conveyor, the incombustibility of the incombustibles and the combustibles are reduced as described above, so that the sorting efficiency of the combustibles is improved.

And a non-combustible conveying conveyor 422 for conveying the non-combustible material falling down to the bottom of the end of the speed-controlled conveyor 3 to convey the non-combustible material that has not flowed into the wind force specific gravity separator 4. At this time, a driving drum 423 provided at an end of the incombustible conveyor 422 to provide a driving force of the conveyor is installed as a permanent magnet type driving drum to sort iron objects contained in the incombustible material and to discharge only pure incombustible material.

The waste supplied through the high-speed conveyor transfer step after the soil sorting step has a step of selecting three stages of the specific gravity of the three phases (S400) through the three-stage selection device for the specific gravity of wind force (4).

The apparatus for sorting wind specific gravity triplets comprises a multi-stage air conveyor 41 and a three-way sorting cyclone 42 for supplying a wind power and a suction force to the multi-stage air conveyor.

The multi-stage air conveyor 41 is composed of an inclined structure in which the first air conveyor 411 and the second air conveyor 412 are upwardly clogged so that air and combustibles can be scattered by the wind, The first lower conveying conveyor 413 and the second lower conveying conveyor 414 are installed at the same interval of the same upward slope and spaced apart from each other at the open bottom of the air conveyor and the second air conveyor.

In addition, the first lower conveying conveyor 413 is configured to be forwardly driven so as to discharge the heavy combustible material falling down to the flamer conveying conveyor 415, and heavy in the combustible material blown by the second lower conveying conveyor 414, To discharge the flammable material falling into the flammable matter conveying conveyor.

Also, the heavy combustible conveying conveyor 415 includes a driving drum 417 as a permanent magnet type driving drum to sort iron products mixed with and discharged as a combustible material by wind power, and then to discharge only pure combustible materials. The position of the driving drum is preferably located at the end.

A perforated cover 4151 is formed on the upper part of the heavy combustible conveying conveyor so as to prevent the heavy combustible material from scattering and being scattered during transportation and to arrange a plurality of holes having large diameters so that the lightweight combustible materials can fall and join. A cover is installed.

Further, a plurality of locking films 416 protruding downward are arranged and installed in the upper part of the inner end of the first air conveyor. As shown in FIG. 5, the combustible material having such a size that it is difficult to pass through the space between the engagement films arranged so as to be arranged so that a plurality of positive-locking films 416 are arranged in the width direction of the first air conveyor is caught by the engagement film, . The latching membrane is configured as a separable mounting type so that the upper face side is pressed by the fastening means 4181 constituting the support member 418 to prevent the escape. In addition, the support member 418 may be moved in the longitudinal direction of the first air conveyor to advance or retreat the position of the retention film, if necessary. For this purpose, a rod 4182 formed on one side of the support member And the nut 4184 is rotated at both sides of the fixed portion to interrupt the movement. According to such position adjustment, the position of the scattered combustibles can be adjusted, and it is possible to smoothly sort the combustibles by moving them forward and backward according to the amount and size of the combustibles to be scattered.

According to the illustrated embodiment, the upper surface is larger and the lower surface is narrower, and the shape of the side surface of the retaining film may be a concave rounded rake shape. However, this exemplary shape does not limit the shape of the stopping film of the present invention, but can be changed into various shapes as long as it can be held.

In this way, the catching membrane is composed of a primary air conveyor to a secondary air conveyor, but it is configured to prevent the discharge of flammable material which is light and blown. Large flammable material flies to the cyclone for three-circle selection, . If the cyclone is clogged, the cyclone may fail, so the tripping mechanism plays a very important role for continuous operation.

In addition, the three-circle selection cyclone 42 includes a wind power discharge pipe 421 provided at the lower end of a speed-controlled conveying conveyor 3 for conveying waste that has passed through the soil sorting step and providing wind power through a nozzle, do.

More specifically, the steps of selecting three wind power specific gravity are explained.

The waste having passed through the soil sorting step first descends into the speed-controlled conveying conveyor 3 and moves at a high speed in order to prevent the curtain phenomenon, while the wind power of the cyclone selecting cyclone provided at the lower end of the speed- The combustible contained in the incombustible matter is scattered by the wind power discharged through the discharge pipe 421 and flows into the first air conveyor 411 of the multi-stage air conveyor 41 constituting the three-element selection device for wind specific gravity, And a primary sorting step.

The heavy incombustibles can not be blown into the first air conveyor 411 by the wind force and are discharged through the non-incombustible conveyor installed at the lower end of the speed-adjustable conveying conveyor 422.

The discharged incombustible matter is discharged from the end after transferring. The incombustible incombustible conveyance conveyor 422 installs the driving drum 423 as a permanent magnet type driving drum so as to sort out the iron materials contained in the incombustible matter, and then discharge only pure incombustibles. The position of the driving drum is preferably located at the end.

Among the combustibles in which the incombustibles and the combustibles are sorted by the primary sorting, heavy combustibles are prevented from flowing into the secondary air conveyor 412 through the engagement film 416 protruding downward from the upper side inside the end of the first air conveyor 411 And a secondary flushing conveyor 415 disposed below the gap between the first lower conveying conveyor and the second lower conveying conveyor. The reason for selection is that large size heavy combustibles may be burdened with flammable recovery of cyclone for three-source selection.

The lightweight combustible material passing through the secondary sorting flows in the lateral direction of the three-circle selection cyclone 42 connected to the end of the second air conveyor 412 and then downwardly rotated to be dropped into the lightweight combustible conveying conveyor 419, And the lightweight flammable material conveyed by the lightweight flammable material conveying conveyor 419 is discharged to the lightweight flammable material conveying conveyor 420 installed upwardly at the end so that the perforation of the perforated cover 4151 provided on the upper portion of the heavy flammable material conveying conveyor 415 And is conveyed together with the heavy flint conveying conveyor 415. [

On the other hand, the heavy combustible material heavy in weight is discharged to the heavy combustible conveying conveyor 415 by the second lower conveyance conveyor which falls and is driven in the reverse rotation, among the combustibles scattered by the second air conveyor and being conveyed. At this time, the heavy combustible conveying conveyor 415 for discharging the heavy combustible material installs the driving drum 417 as a permanent magnet type driving drum to sort iron products mixed and discharged together with wind power by wind power, and then to discharge only pure combustible materials. The position of the driving drum is preferably located at the end.

In this way, it is possible to prevent environmental pollution, which reduces scattered dust and odor generation, through the step of selecting the three wind power specific gravity.

The weighted combustibles and the lightweight combustibles selected through the step of selecting the wind power specific gravity are merged at the heavy combustible conveying conveyor 415, and then supplied to the crusher 5 to produce the required size (S500).

In this case, the size of the crushing can be adjusted according to the installation interval of the crushing blade. In the present invention, the crushing size can be, for example, 50 mm or less. However, such a numerical value does not limit the present invention.

The crusher 5 is a high-speed crusher, and any crusher capable of controlling the crushing size of the combustible is sufficient.

(1): Excavator (2): Vibration hopper
(3): Speed-controlled conveying conveyor (4)
(5): crusher (41): multi-stage air conveyor
(42): Cyclone for three-way selection (101): Tooth
(411): first air conveyor (412): second air conveyor
(413): first lower conveying conveyor (414): second lower conveying conveyor
(416): latching membrane (415): heavy flint conveyor
(417, 423): driving drum (418): supporting member
(419): Lightweight flotation conveyor (420): Lightweight flotation conveyor
(421): wind power discharge pipe (422): incombustible conveying conveyor
(4151): perforated cover 4181:
(4182): Road (4183): Fixed portion
(4184): nut

Claims

A step of separating a plastic bag wrapped with an excavator equipped with a toothed trowel or wrapped with municipal waste in a non-crushing manner to select a coarse combustible;
A waste sorting step of removing waste in the wastes sorted and broken by using a vibration hopper;
A high-speed conveyor conveying step of conveying the waste material from which the soil-free material has been removed at a high tilt angle through a speed-controlled conveying conveyor to prevent a curtain phenomenon overlapping between combustible materials and incombustible materials, thereby improving sorting efficiency;
The wastes discharged from the end of the speed-controlled conveying conveyor are sorted into incombustibles, heavy combustibles and lightweight combustibles while reducing scattering dust and odor through a multi-stage air conveyor and a cyclone separator for three-way selection. A step of selecting three wind power specific gravity;
And crushing the combined weighted combustibles and lightweight combustibles with the crusher after the selective discharge to produce a uniform size crushing process.

The method according to claim 1,
In the step of selecting three wind power specific gravity,
A primary sorting step of dropping heavy incombustible waste among the waste by wind power at the end of the speed-controlled conveying conveyor to the lower incombustible conveying conveyor and discharging the light incombustible material into the first air conveyor of the multi-stage air conveyor;
A secondary sorting step of dropping the heavy combustibles among the selected combustible materials in the primary sorting step to the lower heavy combustible conveying conveyor by using a catching film provided at the end of the first air conveyor;
And a tertiary sorting step of letting the lightweight combustibles having passed through the secondary sorting flow in the lateral direction of the cyclone selecting cyclone connected to the end of the second air conveyor and then downwardly rotating so as to drop and discharge the lightweight combustibles to the conveying conveyor &Lt; / RTI > wherein the process comprises the steps of:

The method of claim 2,
Wherein the incombustible conveying conveyor and the driving drum provided at the end portion of the heavy-matter conveying conveyor are constituted by a permanent magnet drum so as to sort iron materials.

The method according to claim 1 or 2,
Wherein the multi-stage air conveyor comprises a first air conveyor and a second air conveyor, the upper and left and right sides of which are closed so that the air and the combustible are scattered by the wind force, And the first lower conveying conveyor and the second lower conveying conveyor are spaced apart from each other by a predetermined distance. The size of the combustible discharged through the secondary air conveyor by the fastening film provided at the end of the first air conveyor is large Wherein the flame retardant is formed to prevent the release of light flammable substances.

The method of claim 4,
The first lower conveying conveyor is configured to be driven to rotate forward so as to discharge the heavy combustible material falling down to the heavy flammable conveying conveyor and to discharge the combustible material falling into the second conveyor to the heavy flammable conveying conveyor because it is heavy among the combustible materials blown by the second lower conveying conveyor And a second crushing step for crushing the solid fuel.

The method of claim 4,
The method of claim 1, wherein the first air conveyor includes a first air conveyor and a second air conveyor. The first air conveyor is configured to be separated from the first air conveyor, .

The method of claim 6,
The retaining film is configured such that the upper surface thereof is pressed by the fastening means constituting the support member to prevent the release film from falling off. The upper surface of the retaining film is large and the lower surface thereof is narrow. &Lt; / RTI > wherein the process comprises the steps of:

The method according to claim 1 or 2,
Wherein the cyclone selecting cyclone comprises a wind power discharge pipe provided at the lower end of the speed-controlled conveying conveyor to provide wind power.