KR20140147481A - Municipal waste treatment system - Google Patents

Municipal waste treatment system Download PDF

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Publication number
KR20140147481A
KR20140147481A KR1020130070827A KR20130070827A KR20140147481A KR 20140147481 A KR20140147481 A KR 20140147481A KR 1020130070827 A KR1020130070827 A KR 1020130070827A KR 20130070827 A KR20130070827 A KR 20130070827A KR 20140147481 A KR20140147481 A KR 20140147481A
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KR
South Korea
Prior art keywords
municipal waste
municipal
disposed
downstream side
primary
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KR1020130070827A
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Korean (ko)
Inventor
김호철
김낙준
Original Assignee
주식회사 엘드림월드
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Priority to KR1020130070827A priority Critical patent/KR20140147481A/en
Priority to CN201310716638.0A priority patent/CN104056842B/en
Publication of KR20140147481A publication Critical patent/KR20140147481A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE
    • B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/40—Solid fuels essentially based on materials of non-mineral origin
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

Abstract

The present invention provides a municipal waste treatment system for producing useful solid fuel using municipal wastes and municipal wastes made of inorganic wastes. The municipal waste treatment system of the present invention comprises a primary crusher (10) for firstly crushing municipal waste; A sorting conveyor (12) for manually sorting glass, stone, non-magnetic material and the like from the disposal of municipal waste; A magnetic separator (14) for selecting a magnetic substance material from the disposal of municipal wastes; A secondary crusher (16) for crushing again the secondary crushing of the municipal waste to a small size; A drying furnace (18) for drying a small scale of municipal waste with hot air; A mixer 34 for adding and mixing additives to the dried small scale lumps; A primary pulverizer (38) for primary pulverizing the small-scale pulverized material to which the additive has been added, into a smaller-sized pulverized material; A sorter (40) for sorting nonmagnetic materials from a small scale crushed material through specific gravity and rotation selection; A second mill (42) for secondarily pulverizing the pulverized material from which the non-magnetic substance material has been removed to a smaller-sized pulverized product; A molding machine 54 for molding the solid fuel using the secondary pulverized pulverized product; And a cold air dryer (56) for drying the molded solid fuel with cool air.

Figure P1020130070827

Description

{MUNICIPAL WASTE TREATMENT SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a municipal waste treatment system, and more particularly, to a municipal waste treatment system through a series of processes of crushing, sorting, drying, crushing collected municipal waste, In the present invention, particularly, an odor or dust generated in such a series of processes is separately collected and processed, thereby providing an environmentally friendly municipal waste treatment system.

Generally, municipal waste is composed of organic waste such as food waste, sewage sludge and livestock manure, and inorganic waste such as paper, resin, metal or glass, and this municipal waste is continuously It is a large-scale occurrence. Previously, most of the municipal waste was abandoned through marine dumping, landfill or incineration. Marine dumping, landfill or incineration is not desirable because it causes secondary environmental pollution. Currently, irregular speculation and incineration are prohibited according to various environmental regulations.

Accordingly, many attempts have been made to convert municipal wastes into resources. Typically, the municipal wastes are treated with a waste disposal device for drying, crushing and sorting non-combustible components such as moisture, metals and glass contained in municipal wastes (RDF) produced by removing only the combustible components through the process is proposed. However, the municipal waste has a moisture content of 60 to 80%. When the moisture content is less than 10%, the amount of self-heating is high. However, it is expensive to dry and has many problems in utilization as a resource due to bad odor.

In the case of food waste, a method of forced drying using heat energy is used to solve the problem that it is difficult to recycle immediately because a large amount of water is contained. A hot air dryer, a disk dryer using high-temperature steam, a microwave dryer or the like is used for forced drying. However, when the apparatus is used, excessive energy is consumed, which is economically undesirable. In addition, there are many modified methods based on composting drying method based on fermentation heat of microbial fermentation heat, and sun drying method based on fermentation compost of forced air contact circulation type. However, there is a problem that the treatment period is too long, There is a problem that the value of the fuel is deteriorated due to the reduction of the amount of heat.

Korean Patent Publication No. 2012-0064821 discloses a method for producing solid fuel using flammable waste. When incineration is carried out by using lime lime, environmental pollutants such as dioxin are not discharged, and the vinyl is melted And the solid fuel is stored for a long time so as to surround the outside of the waste containing the slaked lime. However, the above-mentioned invention has a problem that when the solid fuel is burned, the vinyl burns together and harmful substances can be generated in the air, and a separate heating device for melting the vinyl is added for molding, .

Korean Patent Registration No. 10-1125020 (Registration Date 2012.02.02) relates to a system and a method for manufacturing a solid fuel using an animal feed, wherein the animal manure is fermented for a predetermined period of time and dried by hot air. However, the above-mentioned invention has a problem in that the fermentation of livestock manure is performed for a long period of time after the fermentation for 20 days after the collection and the fermentation requires fermentation for a long period of time. Which is economically undesirable.

In the prior art including the above-mentioned two patent documents, the collected municipal waste is crushed, sorted, dried and crushed and molded into a solid fuel, and then subjected to a series of processes to treat the municipal waste. In particular, there is a problem that odor or dust generated in the series of processes is not separately collected and processed.

The present invention has been developed in view of this point of the prior art, and consists of a series of continuous processes in which collected municipal waste is crushed, sorted, dried, crushed and molded into solid fuel, And an object of the present invention is to provide an eco-friendly municipal waste treatment system including a process of separately collecting and processing stinking odor and dust.

To this end, in the present invention, a municipal waste treatment system for producing a useful solid fuel using municipal wastes such as food waste, sewage sludge, and livestock manure, and municipal wastes made of paper wastes, resin wastes, metals, . The municipal waste treatment system of the present invention comprises a primary crusher for crushing the collected municipal waste first; A screening conveyor disposed on the downstream side of the primary crusher for manually screening glass, stone, non-magnetic material and the like from crushed waste of municipal waste; A magnet sorting device disposed downstream of the sorting conveyor for sorting magnetic material from a crush of municipal waste; A secondary crusher disposed on the downstream side of the magnet sorter for secondary crushing the crushed material of municipal waste into a small scale; A drying furnace disposed downstream of the secondary crusher and drying a small scale crushed product of municipal waste by hot air; A mixer for adding and mixing an additive to a dried small scale crushed material disposed on the downstream side of the drying furnace; A primary pulverizer disposed on the downstream side of the mixer for primary pulverizing the small-scale pulverized material to which additives are added, into a smaller-sized pulverized material; A sorter disposed on the downstream side of the primary pulverizer for selecting non-magnetic material from the small-sized pulverized material through specific gravity and rotation selection; A secondary pulverizer disposed on the downstream side of the sorter to secondarily pulverize the pulverized material from which non-magnetic material has been removed and removed into a smaller-sized pulverized product; A molding machine disposed on the downstream side of the secondary pulverizer to form a solid fuel using the pulverized secondary pulverized material; And a cold air dryer disposed on the downstream side of the molding machine for drying the molded solid fuel with cool air.

The present invention also includes a deodorizer for collecting and removing odors generated from the primary crusher to the drying furnace in the line.

In the present invention, it is preferable that a concentrator for concentrating the malodorous wastewater to a high temperature on the downstream side of the deodorizer, and an evaporator for evaporating the moisture of the high concentration of the malodorous wastewater concentrated on the downstream side of the concentrator, A drum dryer is disposed.

The present invention also includes a dust collector for collecting and treating the dust generated in the pulverizing process of the municipal waste in the line from the mixer to the secondary pulverizer.

1 is an explanatory view for explaining a municipal waste treatment system of the present invention;

As mentioned in the description of the prior art, municipal wastes generally consist of organic wastes such as food waste, sewage sludge and livestock manure, and inorganic wastes such as papers, resins, metals or glass. Various methods of treating such municipal wastes are known, but a method of manufacturing a solid fuel having excellent combustibility by using municipal wastes is known in that it takes advantage of resource utilization.

In the present invention, it is intended to provide a municipal waste treatment system for the purpose of producing a solid fuel using municipal wastes.

Therefore, the objects to be treated in the present invention are municipal wastes composed of organic wastes such as food wastes, sewage sludge and livestock manure, and inorganic wastes such as paper, resin, metal or glass, as mentioned above. The treatment of municipal waste carried out by the municipal waste treatment system of the present invention is defined as the following stage.

- Collecting municipal waste including organic wastes and inorganic wastes.

- The primary step of disposing collected municipal waste.

- Manually selecting glass, stone, non-magnetic material, etc. from the disposal of municipal waste;

- selecting the magnetic material from the disposal of the municipal waste by using the magnet,

- second crushing the crushed material of glass, stone, non-magnetic material and municipal solid waste into a small size;

- drying the small scale lumps,

- collecting and removing odors generated in the crushing, sorting and drying stages,

Adding the additives to the dried small scale pulverized product and mixing them,

- a first crushing of the small-scale crushing material to which the additive has been added with a smaller crushing material,

- Selecting non-magnetic materials from small crushed materials through specific gravity and rotation selection,

- Secondary pulverization of the pulverized material, from which non-magnetic material has been removed, into smaller and smaller pulverized material,

Storing the secondary pulverized pulverized product,

- molding the solid fuel using the second pulverized pulverized product,

Drying the shaped solid fuel with cold air,

Storing the dried solid fuel,

- Measuring and discharging solid fuel.

The treatment of municipal wastes is performed by the municipal waste treatment system according to the present invention shown in Fig.

As shown in FIG. 1, the municipal waste treatment system of the present invention includes a primary crusher 10 through which collected municipal waste is injected through a slope inclined conveyor. The primary crusher 10 crushes municipal wastes covering the above-mentioned kinds of organic wastes and inorganic wastes to a size of about 100 mm in diameter or length.

On the downstream side of the primary crusher 10, a sorting conveyor 12 is disposed. This sorting conveyor 12 is provided with a relatively large waste, such as various glass, stone and non-magnetic materials, which is contained in the primary crusher 10 during the transportation of the crushed waste of municipal waste, It is manually selected and removed.

On the downstream side of the sorting conveyor 12, a magnetic separator 14 is disposed. In the magnetic separator 14, the magnetic material in the waste is selectively removed by the magnetic force.

On the downstream side of the magnet sorting device 14, a crusher of the municipal waste can be secondarily crushed to a size smaller than that of the crushed crushed material in the primary crusher 10, for example, a size of 50 mm or less in diameter or length A secondary crusher 16 is disposed.

On the downstream side of the secondary crusher 16, a drying furnace 18 is disposed. The crushed material from the secondary crusher 16 is supplied to the drying furnace 18 through the conveying conveyor. The drying furnace 18 is supplied with hot air from a combustion furnace 20 using a waste gas as a heat source to dry the waste of municipal waste supplied to the drying furnace 18. The drying furnace 18 may be constituted by a multi-stage drying stage.

Since the municipal waste having a high moisture content is treated in the primary crusher 10, the sorting conveyor 12, the magnetic separator 14, the secondary crusher 16 and the drying furnace 18, the natural evaporation or the forced evaporation It is required to collect and process odor generated from these. To this end, the upper parts of the above-mentioned components, namely the primary crusher 10, the sorting conveyor 12, the magnetic separator 14, the secondary crusher 16 and the drying furnace 18, A deodorizer 24 for collecting and deodorizing odors is arranged. Odorous water is collected by the deodorizer (24), and the water is agglomerated to produce odorous wastewater. It is preferable that such odorous wastewater is concentrated and then dried and discarded.

To this end, the concentrator 26 and the drum drier 28 are disposed on the downstream side of the deodorizer 24 in order. The high-temperature steam is supplied to the thickener 26 and the drum dryer 28 from the steam boiler 30. In the concentrator 26, the malodorous wastewater supplied thereto is evaporated and concentrated by heating using high temperature steam. The concentrated concentrated high-concentration odorous wastewater is supplied to the drum dryer 28. A high temperature steam is supplied from the steam boiler 30 to the drum dryer 28 disposed on the downstream side of the thickener 24 and an acidic or alkaline neutralizer may be supplied to neutralize the acidity of the high concentration wastewater from the neutralizer 32 have. On the drum surface of the drum dryer 28, the high-temperature steam generating high-temperature steam evaporates the moisture of the malodorous wastewater supplied thereto, and the residue of odorous components is generated in the gel state and discharged. These odor component residues in the gel state are not discharged to the outside of the system as they are added to the additives of the solid fuel as will be described in detail later.

Again, returning to the drying furnace 18, a mixer 34 is disposed downstream of the drying furnace 18. This mixer 34 is in the form of a chestnut mixer and is mixed with a secondary crush of dried municipal waste supplied from the drying furnace 18 and an additive supplied from an additive silo 36 separately provided in the mixer 34 . Here, the additive added to the secondary pulverizer of the municipal waste supplied to the mixer 34 is, for example, a mixture of organic waste selected from municipal wastes, corrosive acid, graphite powder, ferric oxide, calcium hydroxide or magnesium hydroxide And is added to the mixer 34 in the form of a dry powder. Such an additive makes it possible to improve the combustibility of the finally produced solid fuel. On the other hand, the additive silo 36 for supplying the additive to the mixer 34 is supplied with the gel odor ingredient remnants produced from the drum dryer 28 and can be used as a part of the additive.

The secondary pulverized product of the municipal waste mixed with the additive in the mixer (34) is transferred to the primary pulverizer (38) side disposed on the downstream side of the mixer (34). The secondary pulverized product of the municipal waste transferred to the primary pulverizer (38) can be pulverized to a size of 30 mm or less in diameter or length. After crushing the screen can be sorted.

On the downstream side of the primary pulverizer 38, there is disposed a sorter 40 for sorting the non-magnetic material from the primary pulverized material of municipal wastes by specific gravity or rotation sorting method. Thereafter, on the downstream side of the sorter 40, there is disposed a secondary pulverizer 42 for pulverizing the primary pulverized product of municipal waste to a size of 20 mm or less in diameter or length. The secondary pulverized product of the municipal waste mixed with additives for drying and burning by disposing the secondary pulverizer 42 is then produced as a suitable particle material as a starting material for the solid fuel to be molded.

On the other hand, in the line of the mixer 34, the primary pulverizer 38, the sorter 40 and the secondary pulverizer 42, dust is generated in the pulverizing process of municipal waste, and therefore it is necessary to collect and process these dusts. For this purpose it is possible to collect dust on the top of the above-mentioned components, namely the mixer 34, the primary crusher 38, the separator 40 and the secondary crusher 42 via respective hoods 44 A dust collector 46 is provided. The dust collector 46 collects dust by the help of the turbo fan 48 and is supplied to the adsorption tower 50 disposed downstream of the turbo fan 48 and by the activated carbon constituting the adsorption tower 50 The odor is deodorized in the dust and the finally collected residue can be recovered to the additive silo 36 side again.

On the downstream side of the secondary pulverizer 42, a facility prepared for molding solid fuel is disposed. On the downstream side of the secondary pulverizer 42, there is disposed a storage tank 52 in which the pulverized material having a size of 20 mm or less is collected and stored in the secondary pulverizer. On the downstream side of the storage tank 52, a molding machine 54 for molding the solid fuel using the pulverized municipal waste treated as described above is disposed. In this molding machine 54, a solid fuel in which the pulverized product of municipal solid waste is molded in the shape of a bar, briquet or pellet can be obtained.

On the other hand, the molded solid fuel needs to be cooled and dried since a high temperature of 65 ° C or more may occur due to the frictional heat of the additive during molding. To this end, a cold air dryer 56 is disposed downstream of the molding machine 54.

The solid fuel that has been cooled and dried while passing through the cold air dryer 56 disposed on the downstream side of the molding machine 54 passes through the storage tank 58 and the weighing bench 60 which are disposed in order on the downstream side of the cold air dryer 56 Solid fuel using municipal waste as a final product can be manufactured and carried out.

As described above, the present invention provides a system for treating municipal wastes through a series of processes for producing collected municipal wastes by crushing, sorting, drying, crushing and molding them into solid fuel, And dust are separately collected and processed, thereby providing an eco-friendly municipal waste treatment system.

10: Primary crusher, 12: Screening conveyor, 14: Magnet sorting machine, 16: Secondary crusher, 18: Drying furnace, 20: Combustion furnace, 22; 24: Deodorizer, 26: Condenser, 28: Drum dryer, 30: Steam boiler, 32: Neutralizer, 34; A mixer 36 an additive silo 38 a primary crusher 40 a selector 42 a secondary crusher 44 a hood 46 a dust collector 48 a turbo fan 50 an adsorption tower 52 a reservoir 54 a molding machine 56, Cold air dryer, 58: storage tank, 60: weighing platform.

Claims (4)

1. A municipal waste treatment system for producing a solid fuel useful by using municipal wastes such as food waste, sewage sludge and livestock manure, and municipal wastes composed of inorganic wastes such as papers, resins, metals or glass, The system
A primary crusher (10) for crushing the collected municipal waste first;
A sorting conveyor (12) disposed downstream of the primary crusher (10) for manually sorting glass, stone, non-magnetic material and the like from crushed waste of municipal waste;
A magnet separator (14) disposed on the downstream side of the screening conveyor (12) to select a magnetic substance material from a crush of municipal waste;
A secondary crusher (16) disposed on the downstream side of the magnet separator (14) for secondary crushing the crushed material of municipal waste to a small size;
A drying furnace (18) disposed on the downstream side of the secondary crusher (16) and drying a small scale crushed product of municipal waste by hot air;
A mixer (34) disposed downstream of the drying furnace (18) for adding and mixing an additive to the dried small scale crushed material;
A primary pulverizer (38) disposed on the downstream side of the mixer (34) for primary pulverizing the small-scale pulverized material to which the additive is added, into a smaller-sized pulverized material;
A sorter (40) disposed downstream of the primary pulverizer (38) for sorting the non - magnetic material from the small - sized pulverized material through specific gravity and rotation selection;
A secondary pulverizer (42) disposed on the downstream side of the sorter (40) to secondarily pulverize the pulverized material from which non-magnetic material has been removed and removed into smaller and smaller pulverized products;
A molding machine 54 disposed on the downstream side of the secondary crusher 42 for molding the solid fuel using the crushed secondary crushed material;
A cold air dryer (56) disposed on the downstream side of the molding machine (54) and drying the solid fuel formed by the cold air;
And a control unit for controlling the operation of the municipal waste treatment system. 2. The waste disposal system according to claim 1, further comprising a deodorizer (24) for collecting and removing odors generated from the primary crusher (10) to the drying furnace (18) system. The method according to claim 2, further comprising: a concentrator (26) for concentrating the malodorous wastewater to a high temperature on the downstream side of the deodorizer (24); and a high-concentration odoriferous wastewater concentrated on the downstream side of the concentrator And a drum dryer (28) is disposed to evaporate the odor component residues to generate a gel state of the residues of odorous components. 2. The method according to claim 1, further comprising a dust collector (46) for collecting and treating dust generated in the pulverizing process of municipal waste in the line from the mixer (34) to the secondary pulverizer (44) Waste treatment system.
KR1020130070827A 2013-06-20 2013-06-20 Municipal waste treatment system KR20140147481A (en)

Priority Applications (2)

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KR1020130070827A KR20140147481A (en) 2013-06-20 2013-06-20 Municipal waste treatment system
CN201310716638.0A CN104056842B (en) 2013-06-20 2013-12-23 Domestic garbage treating system

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KR1020130070827A KR20140147481A (en) 2013-06-20 2013-06-20 Municipal waste treatment system

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KR102270489B1 (en) * 2020-08-31 2021-06-29 한정근 A device for removing foreign substances and cleaning aggregates in the process of crushing construction waste and recycling it as recycled aggregate or manufacturing crushed stone aggregate
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