KR20020047074A - Resources circulation management system - Google Patents

Abstract

PURPOSE: A waste recycling system is provided, which dry and screen the input waste to separate useful waste, homogenize the waste to endow more effective heating value as fuel and incinerate waste containing minimum combustible matter thus reducing air pollution. CONSTITUTION: The system comprises a measuring part(200), a drying part(300), a screening part(400), a homogenizing part(500) and an incinerating part(600). Waste coming from domestic, construction, organics and household is measured to confirm incoming weight of waste. Waste coming from domestic and organics is dried to a destined level by a drying equipment. The waste is separated into non-combustible, combustible and useful one. Combustible waste is mixed, crushed and dried to make well homogenized waste to incinerate. Then the waste is incinerated to use as fuel.

Description

Circulation system for waste resourceization {Resources circulation management system}

The present invention relates to a waste treatment process, and more particularly, it is possible to maximize the recycling of waste by treating various wastes brought into the landfill in a form suitable for the characteristics of each waste, and greatly improve the stable and efficient utilization of the landfill site. It relates to a circulatory system for waste resources that can contribute.

In recent years, as industrial development and economic scale expand, the amount of waste generated at home and industrial sites has been increasing steadily every year.

The amount of waste generation is mainly changed in accordance with the industrial structure and consumption patterns. Recently, the landfill site is finally reclaimed through the continuous waste generation control policy such as waste-based payment system, separate collection and one-time use control and expansion of waste incineration facilities. Efforts are being made to reduce the amount of waste generated.

On the other hand, the current wastes to landfills are mainly composed of household wastes and workplace wastes. Among them, household wastes are gradually decreasing due to the above-mentioned waste generation control policy and expansion of incineration facilities and recycling rate. Waste has been gradually increasing due to the increase in industrial activities and the rather expensive industrial structure.

Despite the efforts to expand and recycle incineration wastes, most of the wastes that can be recycled are simply landfilled at landfill sites, and environmental pollution is a problem due to odors, leachate, dust, and pests. It has been the subject of complaints from residents around the landfill site.

Accordingly, the present invention has been made in order to solve the above problems, the object of the present invention is to dry the various wastes to be landfilled and sorted according to their properties to separate the useful materials and finally waste in a form suitable for combustion It is possible to maximize the recovery of useful materials by fuelizing and pyrolysis, and at the same time to provide a circulation system for the recycling of waste resources to minimize the environmental pollution caused by the exhaust gas.

1 is a block diagram showing the overall process of the waste recycling circulation system according to the present invention.

Figure 2a is a block diagram showing in detail the waste treatment process shown in FIG.

Figure 2b is a cross-sectional view of the drying pit in the municipal waste treatment process shown in FIG.

Figure 3 is a block diagram showing in detail the construction waste treatment process shown in FIG.

Figure 4 is a block diagram showing in detail the process of the organic waste shown in FIG.

5 is a block diagram showing in detail the process of home waste shown in FIG.

Figure 6 is a block diagram showing in detail the process of incineration ash according to the present invention.

Description of the main parts of the drawing

311: bongbonggi 312: dry feet

313,322,333: Separator 314: By sorting

315,325,342: Magnetic separator 317,335: Air filter

318,336: Press-fit blower 321,331,341,351: Hopper

323,343: Crusher 324: Wind sorter

334 crusher 353 calcination equipment

According to the present invention, there is provided a circulation system for recycling wastes according to the present invention in a waste treatment process for treating various wastes carried into landfills, household wastes, construction wastes, organic wastes and households brought into the landfills. A waste weighing step of weighing each weight of the waste to grasp the throughput of each waste; A waste drying step of drying the water contained in the domestic waste and the organic waste among the wastes which have passed through the waste measuring process to a predetermined rate of water content through a predetermined drying means; A waste sorting step of finally sorting combustibles by separating the building wastes, household wastes, and household wastes, organic wastes, and non-combustibles from the wastes measuring process; A waste homogenization step of finally mixing, crushing and drying each waste that has undergone the waste sorting process in a form suitable for combustion and finally fueling it; And a waste incineration process for incinrating each waste that has been subjected to the waste homogenization process.

The household waste that has undergone the waste measuring process includes a paring step of digging waste using a sacking machine, a drying step of drying the crushed waste on a drying foot, and a nonflammable material contained in the dried waste through a sieve separator. After the screening step of removing the, through the manpower screening step of removing the foreign matter contained in the screening waste through the screening and the magnetic screening step of selecting the metals in the waste screened through the screening by a magnetic separator It is fed into the waste homogenization process.

The construction waste that has undergone the waste measuring process includes a hopper input step of injecting waste into a hopper, a screening step of sorting non-combustibles among wastes transferred from the hopper using a sieve separator, and a crusher of the waste that has undergone the sifting. The crushing step of crushing to a predetermined size through, and the windscreening step of sorting the wastes undergoing the crushing process back to the combustibles and non-combustibles through the wind sorter, the non-combustibles undergoing the windscreening process is put into the magnetic separator and the combustibles are the It is fed into the waste homogenization process.

The organic waste that has undergone the waste measuring process includes a hopper input step of injecting waste into a hopper, a drying step of drying the waste passed through the hopper in a dryer, and a sifting to select the dried waste by size through a sieve separator. And a crushing step of crushing the waste that has undergone the screening again through a crusher, and is introduced into the waste homogenization process or the dedicated combustion furnace.

The home waste that has passed through the waste metering process includes a hopper input step of injecting waste into a hopper, a magnetic separation step of selecting metals in the waste transported from the hopper using a magnetic separator, and a crusher of the magnetic selected waste again. Through the shredding step of shredding to a predetermined size through the waste homogenization process.

Incineration ash is further included in each waste brought into the landfill, and the incineration ash goes through a waste weighing process, and then a hopper input step of injecting the first incineration ash into the hopper, and drying the incineration ash passed through the hopper through a dryer. The drying step and the dried incineration ash is processed through a firing step of firing a certain form after heavy metal leaching prevention treatment such as melting through a firing facility.

Accordingly, through the drying, sorting, and pyrolysis (development) process of various wastes brought into the landfill, the recovery of utilization resources is maximized, and only the waste fuel processed in a form suitable for combustion is burned to finally discharge the landfilled landfill. The amount can be significantly reduced, and the general environmental pollution and the emission of the exhaust gas due to the reduction of landfill amount can be minimized.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing the overall process of the waste recycling circulation system according to the present invention.

Here, among the various wastes brought into the landfill, household wastes are generally generated in homes and are carried in the form of pay-as-you-go bags, and construction wastes include concrete, reinforcing bars, wood, paper, and synthetic resins generated at construction sites. Domestic wastes include waste synthetic resins and textiles generated from small domestic handicrafts, and organic wastes are mainly composed of sludge brought in from sewage treatment plants.

As shown in FIG. 1, the household wastes, organic wastes, construction wastes, and household wastes first introduced into a landfill site contain each waste in a waste vehicle in order to be able to grasp each waste's import, export amount, and waste throughput. The weight is metered through the meter. 200

Water content and heterogeneous domestic waste and organic waste among the wastes measured through the waste metering process 200 are dried to a predetermined moisture content through a drying apparatus in order to facilitate the subsequent waste sorting process. (300)

Thereafter, the dry and homogenized household waste, organic waste and building waste, home waste, which have undergone the measurement process through the waste drying process 300, can be recycled while going through a sieve sorter, manpower sorter, magnetic sorter, and wind sorter. Substances and incombustibles are selected and finally only combustible combustibles are separated.

Then, each waste that passed through the waste sorting process 400 is mixed homogeneously again through a mixer and dried to a constant moisture content through a dryer, and then crushed into an appropriate size and shape that can be utilized as fuel, and finally homogenized for combustion. (500)

The homogenization process 500 is to homogenize the properties of the waste (particle size, moisture, calories, etc.) to a certain level in order to fuel the waste having irregular properties, such as household waste, which has undergone the process of drying and screening, Mix the construction waste and home waste in the first stage through the mixer, and crush the waste mixed in the second stage into 20 ~ 25cm size suitable for burning, and then, in the third stage, 20 ~ 25% of moisture by indirect heat. It is dried to a content and finally made into four stages, and finally made into waste fuel having a homogeneous property by crushing and mixing to a size of 10 to 15 cm.

Waste that has undergone such a waste homogenization process 500 is finally pyrolyzed through an incinerator, and waste heat generated in this process is generated and recovered as a heat source for electricity and district heating through a power generation system. The waste heat recovered in the pyrolysis process is also provided as a heat source of the dryer described above.

Hereinafter, the process of treating each waste in detail based on the entire process will be described.

First step: household waste treatment process

2A and 2B are block diagrams and cross-sectional views specifically illustrating a process up to just before inputting the domestic waste that has passed through the waste metering process 200 into the waste homogenization process 500 in FIG. 1.

As shown in FIG. 2, the household waste that has passed through the waste metering process 200 is enclosed in a pay-as-you-go bag so that it is broken by the bagging machine 311 before being put into the drying pit 312.

Wastes that go through this digging process are put into dry pit (312) and stored for a certain period of time, and the stored waste is homogeneously mixed by a crane, and the water content of about 30% is facilitated to facilitate the subsequent waste sorting operation. To dry.

Specifically, as shown in FIG. 2B, the drying feet 312 are installed on a three-chamber scale separated by partition walls, and the waste first introduced into the drying feet 312 is properly mixed through a crane, and thus, the first chamber and the first chamber. It is transferred to 2 and 3 chambers sequentially and dried.

At this time, the odor generated during the drying of the waste is thermally decomposed and processed in the incineration process 600 through the air filter 317 and the press-fit blower 318 through the suction force of the press-fit blower 318 as shown.

On the other hand, the drying pit 312 is heated by an indirect heating method using waste heat generated during the pyrolysis of waste. That is, a plurality of hot water supply pipes through which the hot water supplied from the hot water supply device passes is installed on the outer wall and the partition wall of the drying pit 312, and the hot water is heated to a predetermined temperature by using the waste heat recovered during the pyrolysis of waste. After providing hot water heated through the hot water supply device to the hot water supply pipe, the interior of the drying pit 312 is heated to about 80 ℃ to dry the waste stored therein.

In addition, the waste crane in the drying pit 312 serves to uniformly control the moisture contained in the waste by appropriately mixing the waste stored in the drying pit 312 so as to facilitate the subsequent waste sorting operation. In charge of.

Through this process, the waste dried up to a predetermined moisture content in the drying pit 312 is input to the sieve sorter 313 to sort the non-combustible substances contained in the waste.

The sieve sorter 313 is typically a two-stage rotary screen (Trommel Screen) consisting of a wood screen and a small-screen screen, fine incombustibles such as soil, glass, stone, etc. contained in the waste in the process of passing through the sieve sorter 313 Is screened.

Here, if necessary, by appropriately adjusting the gap size, length and diameter ratio, rotational speed, inclination, etc. of the screen provided in the sieve sorter 313 so as to match the sorting efficiency of the sieve sorter 313 to the characteristics of the waste. I can regulate it.

Thereafter, the waste that has passed through the sieve sorter 313 is transferred through a conveyor, and the sorted plastics or aluminum included in the waste are sorted through the sorting 314 performed by a worker's manual work.

In this sorting step 314, since the worker is directly exposed to the odor coming from the waste, a separate air conditioning system for removing the odor is installed.

Next, the waste that has passed through the sorting 314 is input to the magnetic sorter 315 and the metals not removed through the sorting and sorting are sorted, and the sorted metals are sorted through the magnetic sorting 315. Recycled and recycled to have a density of at least 1200 kg / m 3.

Thereafter, the waste sorted through the magnetic separator 315 is introduced into the homogenization process 500, mixed, dried and crushed, and finally burned in an incinerator.

As such, the waste that has undergone the screening process through the sieve sorter 313, the water sorting 314, and the magnetic separator 315 is selected from the non-combustible and recyclable organic matter included in the waste so that only the combustibles suitable for combustion are finally obtained. As it remains, not only can the thermal efficiency be obtained better when incineration, but also the amount of harmful gases generated during the incineration process is greatly reduced, thereby reducing air pollution.

In addition, the absolute amount of waste finally incinerated during the various stages of the screening process is significantly reduced, so that the amount of waste actually buried can be naturally reduced.

Second Process: Construction Waste Treatment Process

FIG. 3 is a block diagram illustrating in detail the process up to just before input of the construction waste which passed through the waste measuring process 200 to the waste homogenizing process 500 in FIG. 1.

As shown in FIG. 3, the building waste that has undergone the waste metering process 200 is introduced into the hopper 321 through a crane, temporarily stored and homogeneously mixed.

Then, the waste discharged through the hopper 321 is again fed to the sieve sorter 322 through a conveyor to remove fine non-combustibles such as concrete, gravel, earth and sand contained in the waste.

The waste that has passed through the sieve 322 is removed from the fines and only the granulated material is left in the crusher 323 and is crushed to have a predetermined size.

Waste crushed to a certain size through the crusher 323 is again fed to the wind selector 324 to separate the non-combustibles and combustibles contained in the waste by the wind, the non-combustibles are added to the magnetic separator 325 again to the metals After removal, the remaining waste is used as landfill cover material, and the combustibles are introduced into the homogenization process 500 and finally incinerated in the incineration process 600.

Third Process: Organic Waste Treatment Process

FIG. 4 is a detailed block diagram illustrating the process up to just before the organic waste that has passed through the waste measuring process 200 in FIG. 1 is introduced into the waste homogenizing process 500.

As shown in FIG. 3, the organic waste (hereinafter referred to as 'sludge') that has passed through the waste measuring process 200 is introduced into the hopper 331 and temporarily stored and mixed.

Here, the sludge is usually carried in the form of a dehydration cake of about 80% water content in a sewage treatment plant or the like, and dried through a dryer 332 to be described later, and then introduced into the hopper 331 of about 10% water content. It is mixed with the sludge.

The waste that has passed through the hopper 331 is introduced into the dryer 332 and dried from the wet sludge of the initial moisture content of about 80% to about 10% water content.

At this time, waste heat recovered from the dedicated combustion furnace 337 is used as a heat source used for drying waste in the dryer 332, and direct heating for directly heating the waste in the dryer 332 by hot air by the waste heat. I adopt the method.

And, the sludge in the dry state coming out through the dryer 332 is introduced into the sieve sorter 333, where it is again sorted by size and the dry sludge having a diameter of 4 mm or less is incinerated or homogenized in a separate dedicated combustion furnace 337. Injected to 500 may be finally incinerated in the incineration process (600).

However, the dry sludge having a diameter of 4 mm or more is repeatedly sent to the grinder 334 to be pulverized and mixed with the first sludge introduced into the hopper 331.

At this time, the dedicated combustion furnace 337 employs a cyclone method that can obtain a relatively high heat recovery rate by using the exhaust gas as hot air directly injected into the drying, the heat source of the dryer 332 without using a separate auxiliary fuel It can be used as.

In addition, the odor generated when the waste is dried in the dryer 332 is sent to the dedicated combustion furnace 337 through the air filter 335 and the press-in blower 336 by the suction force of the press-in blower 336, and is about 850 ° C. Because it is burned at high temperature, it does not cause any odor and it can satisfy satisfactorily below atmospheric standard by air pollution prevention facilities.

4th process: home waste treatment process

FIG. 5 is a detailed block diagram illustrating a process up to just before input of the domestic waste that has passed through the waste metering process 200 into the waste homogenization process 500 in FIG. 1.

As shown in FIG. 5, the home waste containing waste synthetic resin, fabrics, etc., measured through the waste metering process 200 is introduced into a hopper 341 and homogeneously mixed by a crane, and then a magnetic separator through a conveyor ( 342) to sort the metals contained in the waste.

As such, the waste from which metals are removed while passing through the magnetic separator 342 is transferred back to the crusher 343 through a belt conveyor, and is generally crushed to have a predetermined size by a shear crushing or compression crushing method. Injected to 500, mixed, dried, crushed and finally incinerated in an incineration process (600).

5th Process: Incineration Ash Treatment Process

6 is a convex diagram illustrating a step-by-step process of incineration ash in landfill-loaded waste according to the present invention.

Among the landfill-loaded wastes shown in FIG. 1 described above, incinerator ash generally carried in the form of incineration residues already incinerated is further included, and the processing is as follows.

The incineration ash first introduced into the landfill is weighed through the waste metering process 200, like other types of waste, and then put into the hopper 351 to be temporarily stored.

At this time, the hopper 351 is injected together with the first incineration ash, and the internally treated incineration ash generated after the incineration process, which is the final treatment process of the above-mentioned household waste, organic waste, construction waste, and household waste, is added together with the first incineration ash. And the internal incineration ash are mixed homogeneously with the hopper 351.

The incineration material mixed through the hopper 351 is then transferred to the dryer 352 and dried at an appropriate moisture content for firing, and finally, in the calcination plant 353, after the heavy metal dissolution prevention treatment through melting or mixing of additives. It is recycled into road substrates and building materials. Thereby, the elution of the heavy metal by the direct embedment of an incineration ash can be prevented beforehand.

According to the present invention described above, through the process of drying and sorting the various wastes brought into the landfill, the reusable useful materials are separated and reused, and the amount of combustibles that can be combusted is also treated in a minimized form, and homogenized again. By incineration and finally incineration to improve efficiency as a fuel, which can be burned with better thermal efficiency than incineration of waste, and also because the content of impurities contained in the combustible waste finally incinerated is small. In addition, the amount of harmful gas generated by the gas is greatly reduced, thereby minimizing the air pollution caused by the emitted gas.

In addition, the absolute amount of waste finally incinerated during the various stages of the screening process is significantly reduced, so that the amount of waste actually buried is naturally reduced, which can greatly contribute to the stable and efficient use of the landfill site.

Claims (8)

In the waste treatment process for treating various wastes brought into landfill, A waste metering process (200) for determining the throughput of each waste by weighing each weight of household waste, construction waste, organic waste and household waste brought into the landfill; A waste drying process (300) for drying the water contained in the domestic waste and the organic waste among the wastes passed through the waste measuring process (200) to a water content of a predetermined ratio through a predetermined drying means; Waste sorting process for finally sorting the combustibles by separating the building wastes, household wastes and the non-combustibles and useful materials contained in the organic wastes and the organic wastes, which went through the waste measuring process 200 and the waste drying process 300. 400; A waste homogenization process 500 which finally mixes, shreds, and drys each waste that has passed through the waste sorting process 400 into a form suitable for combustion and finally fuels it; And Waste incineration process 600, characterized in that the waste incineration process (600) for incineration of each waste that passed through the waste homogenization process (500). The waste of claim 1, wherein the household waste that has passed through the waste metering process 200 is dried in a crushing waste using a sacking device 311 and dried in a drying pit 312. And a sieve screening step of removing non-combustibles contained in the dried waste through a sieve screener 313, and a manpower screening step of removing foreign substances contained in the waste screened through the sifting screening through the sorting screen 314; Circulation system for waste resources, characterized in that input to the waste homogenization process (500) through a magnetic screening step of sorting the metals in the wastes passed through the manpower selection by a magnetic separator (315). According to claim 2, the municipal waste is put into the drying pit 312 of the three-chamber structure divided into partition walls and mixed through a crane, the first chamber, the second chamber and the first by the indirect heating method by hot water supply pipe The circulation system for the waste resources, characterized in that sequentially moved to three rooms, the moisture content is dried to about 30%. According to claim 1, The building waste passed through the waste measuring step 200, the hopper input step of injecting the waste into the hopper 321, and the non-combustible waste in the waste transported from the hopper 321 sieve 322 Screening step for screening using, and the crushing step of crushing the waste after the screening by a crusher 323 to a predetermined size, and the waste after the crushing process again through the wind sorter 324 combustibles and non-combustibles Wind screening step of sorting with, and the non-combustibles undergoing the wind screening process to sort the metals, the remaining waste is subjected to a magnetic screening step of sorting through the magnetic sorter 325 to utilize the landfill cover material, the wind sorter 324 The combustibles selected in the) circulation system for waste resources, characterized in that the input into the waste homogenization process (500). The method of claim 1, wherein the organic waste that has passed through the waste metering step 200, a hopper input step of injecting waste into the hopper 331, and drying to dry the waste passed through the hopper 331 in the dryer 332 And a sieve screening step of sorting the dried waste by size through a sieve sorter 333, and sludge having a diameter of 4 mm or less selected through the sieve sorter 333 is introduced into a dedicated combustion furnace 337 and burned. The sludge having a diameter of 4 mm or more is sent to the hopper 331 again through the grinder 334, mixed with the first waste, and passed through the dryer 332 and the sieve 333 again. Circulation system for waste resources, characterized in that the input to the dedicated combustion furnace (337) or homogenization process (500). According to claim 1, The home waste is subjected to the waste measuring step 200, the hopper input step of introducing the waste into the hopper 341, and the metals in the waste conveyed from the hopper 341 magnetic separator 342 For the waste resources, characterized in that it is input to the waste homogenization process 500 through a magnetic screening step of sorting using, and a crushing step of crushing the magnetically sorted waste back to a predetermined size through the crusher (343). Circulatory system. According to claim 1, wherein each of the waste introduced to the landfill further comprises an incineration ash, the incineration ash after the waste metering process 200, and then the hopper input step of injecting the first incineration ash introduced into the hopper 351 and Drying the incineration ash through the hopper 351 through the dryer 352 and firing the dried incineration ash in a calcination facility 353 or by melting the heavy metal by the mixing of additives and then firing it in a predetermined form. Circulation system for waste resources, characterized in that processed through the firing step. According to claim 1, the waste homogenization step 500 is a mixture of each waste of irregular shape after the sorting process 400 for each type of waste well in one step, crushed in 20 ~ 25Cm size in two steps, and then in three steps A circulation system for waste resource recycling, characterized by drying at a constant moisture content of 20 to 25%, crushing to 10 to 15 Cm in four steps, and homogenizing the properties of the waste through mixing.