KR100998793B1 - The method for manufacturing a mixing solid fuel from municipal waste and landfilled waste - Google Patents

Abstract

PURPOSE: A manufacturing method of mixed solid fuel including household waste and reclaimed waste is provided to reduce the energy consumption amount for the manufacturing process, and to economically manufacture the solid fuel. CONSTITUTION: A manufacturing method of mixed solid fuel including household waste and reclaimed waste comprises the following steps: crushing the household waste with a first crushing unit(101), and separating combustible materials using a first filtering device(110); crushing the reclaimed waste with a second crushing unit(102) and separating the combustible materials using a second filtering device(120); mixing the separated combustible materials to store inside a crushed combustible material storage tank(150); and mixing the combustible materials with calcium hydroxide by controlling the combustible materials using PLC(500).

Description

The method for manufacturing a mixing solid fuel from municipal waste and landfilled waste}

The present invention relates to a method for producing mixed solid fuel of domestic waste and landfill waste, and more particularly, to combustible materials selected and separated from landfill waste with combustible materials selected and separated from domestic waste, thereby producing a high quality combustible material in landfill waste. The present invention relates to a method for producing high quality solid fuel by allowing a solid fuel to be produced together with combustible materials contained in domestic waste.

Products made of synthetic resins such as tires, vinyls and plastics, which are widely used in various industries and daily life, are recycled only after use, and most of them are classified as waste and landfilled or incinerated. The landfill cost is so large that it is not only expensive than ordinary waste but also uncorrupted by landfills.

In particular, the recycling rate of waste plastics is low compared to other wastes. Specifically, in 2005 alone, the recycling rate of waste paper is 55%, waste tires are 67%, glass bottles 58%, and scrap metal 43%, while plastics is only 15%. In addition, 4 to 5 million tons of waste plastics are generated every year, and the amount of waste plastics is increasing every year. Recently, the Ministry of Environment recognizes that waste plastics are a resource and improves the recycling rate of waste plastics. The company is actively supporting the quality and specification standards of used solid fuel products and using them as alternative fuels. In the long run, it is expected to increase the recycling rate of waste plastics by 50% and achieve economic effects of 500 billion won per year. .

With the rise of imported energy prices and the expansion of renewable energy, there is a growing interest in the utilization of waste energy. In Korea, the disposal status of most landfills in Korea is about 10 years ahead. As a result, there is a limit to recycling waste energy. In response, the government has banned treasury support for incineration since 2009, and proposed alternatives to the development of RDF through the pretreatment of household waste.

Here, the household waste pretreatment system refers to a series of processes in which a combustible material is processed into a solid fuel by separating and selecting recycled materials, combustible materials, biodegradable materials, etc. before incineration or landfill of household waste collected at home.

In view of this reality, RDF (Refuse Derived Fuel) made of solid fuel by treating combustible waste among household wastes, and RPF (Refuse Plastic Fuel) made of solid fuel by treating waste plastic Many techniques for manufacturing fuel products have been developed.

Currently, in the method of producing RDF from waste, if divided into two types according to the type and characteristics of the incoming waste, the method of producing solid fuel by sorting and processing combustible materials from landfill wastes buried in unsanitary landfill or illegal landfill; It is divided into the method of producing combustible materials as solid fuel by sorting and processing the combustible materials from the household waste collected in a pay-as-you-go bag at home, etc.In the production of each solid fuel, each pretreatment system is applied to produce solid fuel. .

The reason for this division is different depending on the landfill in case of landfill waste, but less than 20% of combustible materials, 65% or more of soil is accounted for, and the process of removing soil is the main process. There was something difficult to use.

In addition, the combustible material that is selectively separated from the landfill waste is difficult to produce a level of solid fuel that meets the quality and grade standards of the solid fuel product at the stage of processing into solid fuel when a small amount of soil or steam is contained. There was this.

In addition, in the case of landfill waste, organic matter is decomposed naturally while the waste is buried for a long time, and the classified combustible material is solid, such as vinyl / plastics, fibers / coatings, which have relatively high corrosion resistance in the state where the organic matter is removed. Although only combustible materials that can be utilized as fuels remain, there is an advantage of obtaining very good components, but there is a problem that it is difficult to apply to the domestic waste process due to the problem of earth and sand treatment.

In the case of the landfill wastes seen above, most of the landfill wastes have been difficult to recycle landfill wastes due to not only problems of soil treatment but also contaminated water or odors from landfills for long periods of time. The main focus was on the recovery of the heat energy source at the level of incineration through the combustion process and again asking the landfill site.

However, as discussed above, the amount of recycled resources recovered from the landfill waste may be relatively small, but the utilization of landfill waste is being studied in that there are many materials as solid fuels having considerable calorific value in terms of thermal efficiency. .

On the other hand, in the case of household wastes, through the mechanical mechanical ((Biological) Waste Treatment) process, we recover the most valuable materials and reduce the environmental load through mechanical separation, screening and biological treatment before the final disposal of waste. In the MT process of household waste itself, a lot of energy is consumed in producing high quality solid fuel, and RDF production as a final object has little problem in obtaining solid fuel having a high calorific value.

Therefore, a small amount of energy is required to produce high quality RDF as a recyclable material while using the MT process of household waste, while developing a pretreatment facility capable of producing solid fuel with high calorific value even with a small amount of energy. Although the need is great, there is no alternative yet.

The present invention has been made to solve the above problems, solves the problem of soil removal and odor problems of resources such as high-quality waste synthetic resins that can be recovered from landfill waste, and incineration of resources of such landfill waste In presenting the means of active recycling of the passive energy recycling problem to be recovered to the thermal energy source, the process characteristics that can be linked to the existing household waste MT process are prepared to integrate the recycling resources of landfill waste and household waste. It provides a way to produce high quality solid fuels that are blended with each recycling resource.

More specifically, the high-quality combustible material that is selectively separated from the landfill waste is mixed with the combustible material that is selectively separated from the domestic waste to produce high quality solid fuel by low energy input. In addition, the present invention by applying the combustible material separation step of the landfill waste to the combustible material separation step of the domestic waste, to reduce the operational economic loss operating in a separate process, and to include the high quality combustible material in the landfill waste in the domestic waste It is possible to manufacture solid fuels with flammable materials, to meet the quality standards of solid fuel products of the Act on Environment and Recycling Promotion (Ministry of Environment 2009), and to efficiently combustible materials in landfill wastes. It is to provide a method for fueling.

As a solution of the said subject, this invention is

S-A1) a first sorting step of separating and crushing the imported domestic waste into the first crushing crusher and passing the first sorting device to separate the domestic waste combustible material; S-B1) a second sorting process of separating the landfill wastes carried separately from the household wastes into a second shredding shredder and separating the landfill waste combustible material after passing through a second sorting device; S-C1) Combustibles mixing to store the mixed combustibles in the combustible combustibles mixed storage tank through the third sorting device by integrating the domestic waste combustibles and the landfill waste combustibles separated through the first and second sorting processes Storage process; And, S-C2) a mixing control process including a PLC control process of controlling the domestic waste combustible material and the landfill waste combustible material stored in the pulverized combustible mixed storage tank by a PLC to mix with slaked lime. Provided is a method for preparing mixed solid fuel in landfill waste.

On the other hand, the present invention, after the step S-C2), S-C3) after the mixing control process is transferred to a solid fuel molding machine to form a waste solid fuel by the solid fuel molding machine; S-C3) cooling the waste solid fuel formed by the molding machine to store in a solid fuel reservoir; And S-C4) filtering the odorous air generated in the solid fuel molding process and exhausting the filtered air through an air pollution prevention facility. The mixed solid fuel manufacturing method of claim 1, further comprising living waste and landfill waste. to provide.

On the other hand, the first sorting device and the second sorting device has one or two or more continuous configuration as the screen sorter, preferably including any one or two of trommel screen, disk screen, the third sorting device It may be characterized in that the sorting through the sequence of the dryer, wind power sorter, metal sorter, non-ferrous metal sorter, near-infrared optical sorter, and combustible shredder.

In addition, the present invention temporarily stores the domestic waste combustibles and the landfill waste combustibles flowing from the first sorting device and the second sorting device as the third sorting device, and controls the PLC in the step S-C2). It may be a method for producing a mixed solid fuel of domestic waste and landfill waste, characterized in that it further comprises a sorted mixed storage tank connected.

On the other hand, the present invention is the S-D1) caloric auxiliary material input process, before the combustibles crusher of the third sorting device, a step of injecting a caloric auxiliary material to increase the calorific value through the caloric auxiliary material input device; household waste further comprising It may be a method for producing a mixed solid fuel of the landfill waste.

In addition, the present invention, the ratio of the mixture in the mixing control step as the S-C2) step, the municipal waste combustible material: the landfill waste combustible material: the slaked lime in a weight ratio of 1: 0.2 ~ 5: 0.02 ~ 0.5 It provides a method for producing a mixed solid fuel of domestic waste and landfill waste, characterized in that the mixing and controlling.

According to the mixed solid fuel production method of the domestic waste and landfill waste of the present invention, by combustible material selected and separated from the landfill waste mixed with combustible material selected and separated from the domestic waste, the high quality combustible material in the landfill waste is included in the domestic waste The advantages of producing solid fuels of high quality by making solid fuels with combustible materials present are remarkable. This advantage is not only economical in terms of the final product, such as calorific value, low water content and low ash content of the produced solid fuel, but also low energy input in terms of the ratio of energy administered to the process as a process for producing it. This has the advantage of being possible. In addition, by applying the combustible material separation step of the landfill waste to the combustible material separation step of the domestic waste, it is excellent to reduce the economic loss when operating in a separate process.

Therefore, it is possible to actively recycle landfill waste beyond the problem of passive utilization in which landfill waste is conventionally treated by incineration, thereby significantly increasing the yield of recycling and producing high-efficiency solid fuel in connection with domestic waste. It can be expected to reduce mass production, landfills, and production costs.

In addition, since solid fuel is produced using landfill waste and low water content, it is possible to produce fluff-type solid fuel that meets environmental standards, thereby diversifying solid fuel that can be used as a resource. Can have

1 is a process diagram of manufacturing a mixed solid fuel of household waste and landfill waste according to an embodiment of the present invention.
FIG. 2 is a flow chart showing a mixed solid fuel of domestic waste and landfill waste according to another embodiment of the present invention.
3 is a flow chart showing a mixed solid fuel of domestic waste and landfill waste according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings it will be described in detail with reference to the embodiment so that it can be easily reproduced repeatedly by those skilled in the art to which the present invention pertains.

The present invention, S-A1) a first sorting step of separating the domestic waste combustible material after crushing and crushing the imported domestic waste into the first crushing crusher and passing through the first sorting device;

S-B1) a second sorting process of separating the landfill wastes carried separately from the household wastes into a second shredding shredder and separating the landfill waste combustible material after passing through a second sorting device;

S-C1) Combustibles mixing to store the mixed combustibles in the combustible combustibles mixed storage tank through the third sorting device by integrating the domestic waste combustibles and the landfill waste combustibles separated through the first and second sorting processes Storage process; And,

S-C2) a mixing control process including a PLC control process of controlling the domestic waste combustible material and the landfill waste combustible material stored in the pulverized combustible mixed storage tank by a PLC to mix with calcined lime; It provides a mixed solid fuel production method of domestic waste and landfill waste comprising a.

In addition, the present invention, after the step S-C2), S-C3) after the mixing control process is transferred to a solid fuel molding machine to form a waste solid fuel by the solid fuel molding machine; S-C3) cooling the waste solid fuel formed by the molding machine to store in a solid fuel reservoir; And S-C4) filtering the odorous air generated in the solid fuel molding process and exhausting the filtered air through an air pollution prevention facility. The mixed solid fuel manufacturing method of claim 1, further comprising living waste and landfill waste. Can provide.

In this case, the pulverized combustible mixed storage tank as a feature of the present invention is a storage tank in which the recyclable materials selected and separated are collected after the MT process and the landfill waste sorting and separation process of household waste, and collected in the combustible combustible mixed storage tank. It is one of the features of the present invention in that the mixing ratio is controlled by PLC to optimize the properties of the solid fuel to be produced by measuring the calorific rate of each waste-derived reclaimed raw material and landfilled waste-derived recycled raw material.

That is, since the amount of rehabilitation raw materials derived from landfill wastes is small, but is superior to those of household wastes derived from domestic wastes in terms of calories, the amount of heat of the mixture checked in the pulverized combustible mixed storage tank is "Act on the Promotion of Reduction and Recycling (Ministry of Environment 2009). If the quality standards of the solid fuel products of) are not met, the regeneration fuel from landfill waste will be controlled through PLC. This control process not only saves energy in each process input to produce solid waste fuel derived from household wastes, but also the above-mentioned "Employment and Recycling Promotion Act" (Ministry of Environment 2009). Fluff-type solid fuels that meet the criteria of "can be produced.

In addition, the problem as a means to solve the quantitative problem that had to be treated by the incineration problem, the problem of odor, simple incineration during the reclamation of the conventional landfill waste and the present invention is through the combustible combustible mixed storage tank described above In addition to the integrated process of reclaimed fuel derived from landfills and household waste, reprocessing fuel derived from landfills and household wastes is temporarily stored in the sorted mixture storage tank or immediately after the integrated process through the dryer without the storage process in the sorted mixture storage tank. Proceeding from the above, it is characterized in that the production of solid fuel mixed with domestic waste and landfill waste is very efficient and economical in terms of energy consumption in the production of solid fuel.

The drying step or the direct drying step associated with the sorting mixture storage tank is very effective in minimizing the water content of each rehabilitation material that can influence the quality of the solid fuel. That is, after the drying step, the soil and the like that could not be removed due to moisture in the reclaimed fuel derived from the landfill waste through the wind selector can increase the removal rate of the soil by the wind sorter after the drying step and at the same time obtain a low content recycled fuel. In this regard, the energy savings can be realized in terms of energy savings, since this process is carried out along with the drying process of the regeneration fuel derived from domestic waste and the sorting through the wind sorter.

In more detail, the present invention crushed and crushed the domestic waste and landfill waste, respectively, and after the density screening through the screen sorting machine is temporarily stored in the sorting mix storage tank before passing through the dryer or immediately through the sorting mixed storage tank After passing through the drying and drying waste-derived rehabilitation raw materials and landfill rehabilitation fuel through a drier at a time, the integrated MT process is performed through a wind separator. In summary, the integrated MT process is recycled from the domestic waste-derived reclaimed fuel and the landfill-derived regenerated waste through a dryer, a wind separator, a metal separator, a non-ferrous metal separator, and a near-infrared separator to be crushed in a combustible crusher and stored in a combustible combustible mixed storage tank. In this case, as described above, in order to manufacture the solid fuel in accordance with the standard suitability of the mixture, the combustible combustible mixed storage tank is a PLC (Programmable Logic Controller) to control the inflow of recycled fuel derived from municipal waste or recycled fuel derived from landfill waste. Each process is controlled through the process control such as to control the ratio of the mixture with the slaked lime from the slaked lime input device to meet the quality standards of the solid fuel product.

That is, through the PLC (Programmable Logic Controller) through the feedback control of the input amount of household waste combustibles and landfill waste combustibles to produce high-quality solid fuel with the slaked lime injected from the slaked lime input device. At this time, the confirmation for the control of the mixing amount can be adjusted by taking a certain amount of the mixture of the combustible combustible mixed storage tank during the process, as well as using the apparatus for checking the mixing ratio according to the properties of the mixture Means can be used.

In addition, a combustibles grinder may be further added between the first sorting device and the combustible combustibles mixing reservoir. Here, the added combustible crusher can be used to grind the separated landfill waste combustible material.

Further, when the domestic waste combustible material and the landfill waste combustible material stored in the pulverized combustible mixed storage tank are mixed with hydrated lime, the domestic waste combustible material: the landfill waste combustible material: the hydrated lime is 1: 0.2-5: 0.005-5 It is preferable to mix at a weight ratio of 0.5.

Wherein the combustible waste material: the landfill waste combustible material: the mixing ratio of the slaked lime is 1: 0.2 ~ 5: 0.005 ~ 0.5 when the weight ratio of the mixed solid fuel can exhibit excellent properties such as calories, density, etc. I never do that.

Preferably, the first screening device and the second screening device are screened screens, and the screened screens are preferably any one or a continuous configuration of a trommel screen or a disk screen.

At this time, the rehabilitation raw material passed through the first sorting device and the second sorting device passes through a third sorting device consisting of a dryer, a wind sorting machine, a nonferrous metal sorting machine, a near infrared optical sorting machine, and a combustible pulverizer. In this case, the third sorting apparatus may further include a sorting mixed storage tank before the dryer. Recycling raw materials derived from domestic waste and landfill waste derived from the waste are passed through the third sorting device integrally.

This integrated process is more efficient than producing or utilizing solid fuel through two separate lines in terms of energy efficiency, and is a key process for producing high quality solid fuel through low energy input of solid fuel.

In addition, in the integrated stage, the drying process is the beginning of the third sorting device, and the wind screening process is performed after the drying stage to efficiently remove the soil which has not been removed due to the fine moisture of reclaimed raw materials from landfill waste. As a result, it is possible to improve the quality of solid fuel to be finally produced and to simultaneously process recyclable waste derived from household waste and reclaimed waste derived from landfill through a drier, which solves the conventional problems and is very efficient in terms of energy saving. .

On the other hand, reclaimed waste derived from domestic waste introduced through the first sorting device and landfill waste derived from landfill waste introduced through the second sorting device are subjected to a drier, which may be subjected to a screening mixture storage tank before going through the drier. Is as described above. At this time, the sorting mixture storage tank may serve as a buffer before the process of the drying step through the dryer in the control of the amount of the mixture controlled through the PCL.

  Previously, the trommel screen and the disk screen are screened by particle size difference, the windscreen separator and the nonferrous metal sorter are screened by density difference, and the near-infrared optical sorter is characterized by the characteristics of the material to be screened by the reflected near-infrared wavelength. Scanning to classify the object and when the object is located in the air nozzle by blowing the compressed air instantaneous separation.

In the third sorting device, the biodegradable material is separated through a screen sorter, such as a trommel screen or a disk screen, from crushed domestic waste or landfill waste through the first sorting device and the second sorting device. The step after the step may include a step of screening the non-combustibles with a wind separator, a metal separator or a non-ferrous metal sorter and removing the polyvinyl chloride with a near infrared sorter.

Here, the incombustibles include glass, porcelain, metal recycled products.

Hereinafter, with reference to the accompanying drawings, it will be described in more detail.

1 is a process diagram of manufacturing a mixed solid fuel of household waste and landfill waste according to an embodiment of the present invention.

end. First selection of domestic waste

As shown in FIG. 1, the imported domestic waste is crushed and crushed through the first crushing crusher 101. Here, the household waste brought in by the waste collection vehicle is measured at the weighing table, and then flows into the loading site and is temporarily stored in the household waste storage tank. The household waste storage tank can be homogenized by mixing by a waste crane with a buffer function. Thereafter, household waste is introduced into the first shredding shredder 101 by a waste crane. The household waste is brought into the total amount of waste in the pay-as-you-go bag, and the waste-based bag varies in 3, 5, 10, 20, 30, 50, 75, 100 l. The first shredding shredder 101 is a pre-treatment concept for sorting to effectively shred small plastic bags in the pay-as-you-go bag, and performs an additional function of shredding large wastes of 300 mm or more.

Then, the biodegradable material is separated through the first sorting device 110 including the first trommel screen 113 and the first disk screen 114, and the particle size is selected to pass through the dryer 116. It can be, and stored in the sorted mixture storage tank 115, as shown in Figure 2 may be passed through the dryer 116.

Specifically, the separation of the biodegradable material from the crushed living waste is selected by the particle size to focus on the particle size of the biodegradable material is less than 40mm and the first trommel screen 113 and the first disk screen ( 114). The first trommel screen 113 is the most widely used type for particle size selection and can be selected according to the desired size according to the size and shape of the sieve.

Biodegradable materials, combustible materials, and incombustible materials are mixed in the sorting material having a particle size of 80mm or less, and the organic matter of 40mm or less is stored for secondary treatment, and the combustible material and incombustible material having 40mm or more are stored for secondary treatment. The material may pass through the dryer or through the dryer 116 after being temporarily stored in the sorting mixture storage tank 115 as shown in FIG.

In addition, in the case of landfill waste, landfill wastes transported after the excavation of a predetermined soil after excavation in a landfill site before being introduced into the MT process of household waste are separately pretreated by the second screening device 120.

I. Second sorting of landfill waste

The landfill waste carried separately from the household waste is crushed and crushed by the second crushing shredder 102 and passed through the second sorting device 120 to separate the landfill waste combustible material.

Landfill waste varies depending on the landfill, but the main process is to remove more soil than combustible materials, with less than 20% flammable material and 65% more soil. The primary removal of the soil is by particle size selection using the size difference between the soil and the combustible material, and the secondary removal is a mechanical screening method using only a rake to remove the combustible material. The selected soil is recycled to cover and fill material and the combustible material is directly injected into the dryer 116 or passed through the dryer 116 via the sorted mixture storage tank 115 as shown in FIG.

At this time, the landfill waste is introduced into the hopper through a loader or a crane as an input device for inserting the landfill waste into the crushing crusher is transported in a state in which the large waste is removed through a screen installed in the inlet. Waste temporarily stored in the hopper is quantitatively transferred to the second disk screen 124 by the conveyor.

The second disk screen 124 is the same as the form for pre-treatment of household waste, which is less clogged by the rotation of the disk, and enables the first sorting of the soil at the same time as the waste is transported, thereby increasing the efficiency of the entire system. The spacing between the disks is chosen to be 35 to 40 mm, taking into account the particle size and screening efficiency.

The perforation size of the second trommel screen 123 is also selected to be 35 to 40mm to minimize the loss of flammable material, thereby adding a function for removing the screen clogging phenomenon. One is a blade device to prevent clogging inside the screen, and the other is a brush device to prevent clogging outside the screen, and screen hole clogging does not occur even when a high content of landfill waste is brought in. Soil removal efficiency of the second trommel screen 123 is 95 ~ 98%.

The landfill waste, which has passed through the second sorting device, is stored together in the sorted mixed storage tank 115 in which the municipal waste-derived rehabilitation material is temporarily stored after passing through the first sorting device of the household waste in the MT process of the household waste or immediately passed through the dryer. can do.

All. Starting with the 3rd sorting and dryer MT  Process integration

The two sources that went through the first and second screening include a dryer 116, a wind separator 117, a metal sorter 118-a, a nonferrous metal sorter 118-b, and a near infrared optical sorter 119. Through the third sorting device to enter the integrated MT process. In order to increase the amount of combustibles of landfill waste more effectively, a screening mixture storage tank may be installed in front of the dryer.

The dryer 116 is an apparatus for drying combustibles crushed to 50 mm or less, and further includes a combustion furnace (not shown) for supplying hot air at 350 ° C. and a combustible storage tank (not shown) for storing the dried combustibles. The crushed combustibles are quantitatively supplied by the dryer inlet conveyor, and are discharged by drying the moisture content of the combustibles below 10% through the speed control of the dryer and the temperature control of the dryer inlet and outlet. The drying method is a rotary drum type and direct drying method in which hot air gas and crushed waste are directly contacted in the dryer to dry the waste.

The dryer 116 adjusts the residence time by applying an inverter that can adjust the drum drive speed according to the moisture content of the waste to be dried (average waste residence time: 30 minutes). In addition, the low hot air temperature (300 ~ 350 ℃) is less fire risk, there is no melting, adhesion, seizure of the waste by heat, can be operated continuously up to 24 hours per day. The dryer may control the moisture content by drying the waste by controlling the amount of waste, the amount of hot air, the drum speed when the moisture content exceeds 10%.

The combustion furnace (not shown) is a direct heating type, dry exhaust gas inlet / outlet temperature: 132 ° C./350° C., a direct heating type with excellent thermal efficiency, enhanced heat resistance by castable construction, and temperature control by LNG combustion.

The dry combustible storage tank (not shown) has the same form as the combustible combustible mixed storage tank 150.

At this time, the heat exchanger may be installed in the dryer 116 to collect the hot air generated in the drying process through the heat exchanger and use it as fuel.

Recycling raw materials derived from household waste and landfill waste derived from the dryer are transferred to the wind selector 117.

The sorted material having a particle size of 80 to 200 mm is transferred to the wind selector 117 as waste in which biodegradable substances are removed.

The sorting material having a particle size of 200 mm or more is recycled to the first crushing crusher 101 and crushed to 200 mm or less for efficient sorting of the rear stage sorting device. However, it can also be recycled to a 2nd crushing bag as needed.

The first disk screen 114 is capable of screening light materials by agitating the disk, which makes it easy to screen biodegradable materials and reduces clogging due to the rotational force of the disk. However, when the thickness of the incoming waste layer becomes thick, the screening efficiency decreases. Thereby, the screening efficiency of the biodegradable material is increased by reducing and bringing in the amount of waste carried in after the first screening with the first trommel screen 113.

The primary purpose of the wind selector 117 is to separate combustible materials such as paper, fiber, rubber / leather, vinyl / plastic, etc. by using the density difference, and the second purpose is to improve the natural drying of the waste. . In particular, one feature of the present invention is that the fine soil and the like remaining in the landfill waste-derived rehabilitation material can be removed by wind power.

Heavy objects of high density in the wind selector 117 are discharged under the wind selector 117 and flow into the metal selector 118-a. The heavy material is composed of wood, food and non-combustible materials, and the metal sorter 118-a and the non-ferrous metal sorter 118-b separate ferrous and non-ferrous metals.

The near-infrared optical sorter 119 classifies the targets by scanning the properties of the material to be sorted by the reflected near-infrared wavelengths and separates them by spraying compressed air when the targets are located in the air nozzles. Depending on the system setting, plastics can be classified by material (PE, PS, PET, PVC, etc.), but the sorting facility for waste fuelization of the present invention removes only PVC, which is a dioxin-inducing substance, during combustion.

The final selected combustible material is pulverized in accordance with the quality standards of the solid fuel in the combustible crusher 140. The grinding method is mainly represented by two-axis shearing type and grinder type, and adopts a grinder type grinder which has few mechanical devices and is easy to grind plastics and vinyls. The particle size of the pulverized product is also 50 mm or less to meet the size of 50 mm or less of the final solid fuel.

In the process of inputting the final sorted combustible material into the combustible pulverizer, in order to produce a solid fuel having a higher calorific value according to the requirements of the customer, a step of adding a calorific auxiliary material 201 can be added as shown in FIG. have. The caloric aid input process may be selectively performed as necessary. At this time, the type of caloric auxiliary material is a high-calorie flammable powder in a facility such as a recycling sorting complex, and vinyls may be mainly used.

The pulverized combustible mixture storage tank 150 is installed as a buffer function for the stable supply of waste. If the waste outlet is of the hopper type, a bridge can be formed at the end of the storage tank, and a plate-type discharge structure is adopted.

The combustibles pulverized by the combustible waste crusher 140 are stored in the combustible combustible mixed storage tank 150.

la. Combustible combustibles  Mixing control

After the domestic waste and the landfill waste pass through each of the first and second sorting devices at a time difference, the metal sorter 118-a and the nonferrous metal sorter 118-b after a drying step through one dryer. After passing through the near-infrared sorter 119 and pulverized in the combustibles crusher 140 and stored in the pulverized combustibles mixed storage tank 150, PLC (for optimization of the conditions of the blending amount of the mixture in the pulverized combustibles mixed storage tank) Programmable Logic Controller) 500 is a feature of the present invention.

At this time, the control through the PLC (Programmable Logic Controller) (500) has a high calorie content of the combustibles separated from the landfill waste, the amount inputted from the landfill waste into the combustible combustible mixed storage tank to meet the standard compliance of the solid fuel to be produced finally In order to control, when the amount of heat of the mixture in the pulverized combustible mixture storage tank 150 does not meet the reference value, the landfill provided to the selective mixing storage tank 115 from the second screen 124 through the PLC (Programmable Logic Controller) 500 The control to increase the amount of waste-derived resources is further performed, and it can also be said to be a control step to obtain the best quality solid fuel by adjusting the input amount of the slaked lime input device 155 together.

 That is, the feed rate of the household waste combustibles and the landfill waste combustibles is feedback-controlled through the PLC (Programmable Logic Controller) 500 and mixed with the slaked lime input from the slaked lime injecting device 155 at a predetermined ratio.

The mixture after the mixing process is a step prior to the forming process, and forms a kind of solid fuel in the form of fluff. Since the water content is adjusted by the simultaneous application using wind screening, it can be directly applied to the part that can be used as fuel in the fluff state.

Meanwhile, the household waste combustible material and the landfill waste combustible material stored in the pulverized combustible mixed storage tank 150 are controlled by the PLC 500, mixed with hydrated lime, and then transferred to the solid fuel molding machine 160 to the solid fuel molding machine. By 160, it is formed into waste solid fuel in the form of pallets or flakes.

On the other hand, after obtaining a flop (fluff), which is a kind of solid fuel before passing through the solid fuel molding machine, it is possible to omit the following molding step and storage step, as described above, and according to the large efficiency of energy saving You can get it.

Here, when the domestic waste combustible material and the landfill waste combustible material stored in the crushed combustible mixed storage tank are mixed with hydrated lime, the domestic waste combustible material: the landfill waste combustible material: the hydrated lime is 1: 0.2-5: 0.005-5 Mixing at a weight ratio of 0.5 is preferred.

The solid fuel molding machine 160 is a facility for finally molding the waste combustible material and the landfill combustible material mixed after the crushing and sorting process into waste solid fuel in the form of pallets or flakes. The solid fuel molding machine 160 uses a single screw extruder, and in order to prevent a process accident of the extruder, it is necessary to supply a fixed amount of the mixture and a predetermined press injection into the extruder. In addition, the dry waste is cut, compressed, and molded into the processed holes of the rotating dies by rotating rings and rollers. There is no external heating, which has the advantage of low power consumption. In addition, there is a water evaporation effect by the heat of compression, microbial sterilization effect.

Thereafter, the waste solid fuel molded by the molding machine is cooled and stored in the solid fuel storage tank 170.

Then, the odorous air generated in the household waste combustible material separation process, the landfill waste combustible material separation process, and the solid fuel molding process is filtered to exhaust the filtered air through the air pollution prevention facility 180.

Here, since the steam generated in the molding process causes a significant odor, the exhaust of the extruder is collected by the air pollution prevention facility 180 and discharged to the atmosphere after the cleaning treatment.

Hereinafter, the present invention will be described in detail by specific examples.

However, the following examples are merely to illustrate the invention, but the content of the present invention is not limited by the following examples.

After the living waste is crushed and crushed in the first shredded shredder 101 in the configuration as illustrated in FIG. 1, the household waste combustible material was separated through the first sorting device 110. That is, the debris and crushed household waste passes through the first trommel screen 113 and the first disk screen 114, and the particle size is selected to separate the biodegradable material, and the separated material is introduced into the dryer 116.

On the other hand, the landfill waste is crushed in the second bongbong shredder 102, and then passed through the second sorting device 120 to separate the landfill waste combustible material, and then put into the dryer 116.

The household waste combustibles and the landfill waste combustibles introduced into the dryer 116 were dried through a dryer and subjected to density selection through a wind separator. In this case, in the process of wind turbine selection and wind screening, in addition to density screening by wind screening, there was a great effect in removing fine soils in landfill waste and lowering the water content after passing through the dryer.

Wind dryer, metal sorter, non-ferrous metal sorter and combustible pulverizer as well as the dryer has a feature as an integrated process as a third sorting device, and the subsequent step is also a feature of the present invention that the solid fuel is produced in one line. same. The integrated process of this one line saved energy for solid fuel production.

As the third sorting apparatus described above, the combustible material passing through the dryer passes through the wind separator 117, the metal sorter 118-a, and the nonferrous metal sorter 118-b, and the non-flammables are sorted by the density, and the near-infrared optical sorter 119. ) PVC was separated.

Then, the household waste combustibles and the landfill waste combustibles were crushed in the combustible crusher 140 and then stored in the combustible combustible mixed storage tank 150.

At this time, the combustible mixed storage tank 150, the PLC (Programmable Logic Controller) (500) to control the amount of the landfill waste-derived resources and the control of the calcined lime flow by checking the amount and composition ratio of the mixture from the combustible mixed storage tank 150, It was controlled in connection with the two sorting device 120, the slaked lime input device 155. That is, the feed rate of the household waste combustibles and the landfill waste combustibles is feedback-controlled through the PLC (Programmable Logic Controller) 500 and mixed with the slaked lime input from the slaked lime injector 155 at a predetermined ratio.

The domestic waste combustible material, the landfill waste combustible material, and the slaked lime stored in the pulverized combustible mixed storage tank 150 were mixed in a weight ratio of 1: 1.5: 0.015.

The mixed domestic waste combustible material, the landfill waste combustible material, and the slaked lime were transferred to the solid fuel molding machine 160 to be formed into a mixed solid fuel in a pellet or flake form.

The shaped mixed solid fuel was cooled and stored in the solid fuel reservoir 170.

At this time, the living waste combustible material separation process, the landfill waste combustible material separation process and the odor air generated in the solid fuel molding process is filtered through the air pollution prevention facility 180 to exhaust the filtered air waste and landfill waste The mixed solid fuel was prepared and the low calorific value was measured and listed in Table 1 below.

As shown in FIG. 2, before the drying step of the dryer 116 in Example 1, a selective mixing storage tank 115 for storing the combustible material passing through the first and second sorting devices is further installed. Except for Example 1, except that.

In the case where the sorting mixed storage tank is further provided, the landfill waste, in which the combustible material having passed through the first sorting device and the second sorting device, plays a buffer role before being integrated into the third sorting device and is controlled with the control through the PCL. There was an advantage that can be smoothly performed even control of the derived rehabilitation raw materials.

As in FIG. 3, Example 1 was followed except that the caloric aid input device was further installed.

When the caloric auxiliary input device is further placed, it was confirmed that the calorific value of the solid fuel can be adjusted according to the demand of the consumer.

Comparative example  One

Using only the household waste, the process of the household waste path of Example 1 was prepared to produce a solid fuel of household waste alone, and the low calorific value was measured.

Comparative example  2

Using only the landfill waste was carried out in the process of the landfill waste path of Example 1 to prepare a solid fuel of the landfill waste alone and to measure the low calorific value is shown in Table 1 below.

Example 1 Example 2 Comparative Example 1 Comparative Example 2 Low calorific value (kcal / kg) 4000 4100 3000 3400

Here, the low calorific value is determined by the following formula.

[1]

Here, the high calorific value is the total calorific value generated when the material to be burned of the waste is completely burned to generate carbon dioxide and water,

The hydrogen composition ratio is a composition ratio of hydrogen in the waste by elemental analysis,

The moisture content refers to the moisture content in the waste.

Low calorific value of Example 1 of the present invention is 4000 kcal / kg, low calorific value of Example 2 is 4100 kcal / kg, low calorific value of Comparative Example 1 is 3000 kcal / kg, low calorific value of Comparative Example 2 is 3400 kcal / kg , The mixed solid fuel of the present invention has an excellent characteristic that the low calorific value satisfies the standard low calorific value 4000 ~ 4500kcal / kg.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas falling within the scope of the present invention should be construed as being included in the scope of the present invention.

101: first shredding shredder 102: second shredding shredder
110: first sorting device 113: first trommel screen
114: first disk screen 115: sorting mixed storage tank
116: dryer 117: wind sorter
118-a: Metal sorter 118-b: Nonferrous metal sorter
119: near infrared sorter 120: second sorting device
201: calorie aid input device 123: the second trommel screen
124: second disk screen 130: third screening device
140: third sorting device 150: combustible mixed mixture storage tank
155: slaked lime input device 160: solid fuel molding machine
170: solid fuel reservoir 180: air pollution prevention equipment
500: PLC

Claims (7)

As an integrated process that links the recycling of landfill waste in the MT (Mechanical- (Biological) Waste Treatment) process of household waste,
S-A1) a first sorting step of separating and crushing the imported domestic waste into the first crushing crusher and passing the first sorting device to separate the domestic waste combustible material;
S-B1) a second sorting process of separating the landfill wastes carried separately from the household wastes into a second shredding shredder and separating the landfill waste combustible material after passing through a second sorting device;
S-C1) Combustibles mixing to store the mixed combustibles in the combustible combustibles mixed storage tank through the third sorting device by integrating the domestic waste combustibles and the landfill waste combustibles separated through the first and second sorting processes Storage process; And,
S-C2) a mixed control process including a PLC control process of controlling the domestic waste combustible material and the landfill waste combustible material stored in the pulverized combustible mixed storage tank by a PLC and mixing them with slaked lime; household waste and landfill waste Mixed solid fuel production method.
The method of claim 1,
After step S-C2),
S-C3) after the mixing control process is transferred to a solid fuel molding machine to form a waste solid fuel by the solid fuel molding machine;
S-C3) cooling the waste solid fuel formed by the molding machine to store in a solid fuel reservoir; And
S-C4) filtering the odorous air generated in the solid fuel molding process to exhaust the filtered air through the air pollution prevention facility; mixed solid fuel production method of the municipal waste and landfill waste further comprising.
The method according to claim 1 or 2,
The first sorting device and the second sorting device have one or two to four consecutive configurations as screen sorters, and the third sorting device includes a dryer, a wind sorter, a metal sorter, a nonferrous metal sorter, a near infrared optical sorter, and a combustible material. Mixed solid fuel production method of municipal waste and landfill waste, characterized in that the sorting through the order of the crusher.
The method of claim 3,
The screen sorter is a trommel screen, a disk solid, characterized in that the mixed solid fuel production method of landfill waste.
The method of claim 3,
Before the dryer as the third sorting device, the sorting mixture storage tank temporarily storing the household waste combustibles and the landfill waste combustibles flowing from the first sorting device and the second sorting device, and linked with the control of the PLC in the step S-C2). The mixed solid fuel production method of household waste and landfill waste further comprising a.
The method of claim 3,
S-D1) caloric auxiliary material input process, the step of injecting the caloric auxiliary material to increase the calorific value through the caloric auxiliary material input device before the combustible material crusher of the third sorting device; domestic waste and landfill Process for producing mixed solid fuel of waste.
The method according to claim 1 or 2,
The ratio of the mixture in the mixing control step as step S-C2) is controlled by mixing at a weight ratio of the household waste combustible material: the landfill waste combustible material: the slaked lime = 1: 0.2-5: 0.02-0.5. Method for producing a mixed solid fuel of domestic waste and landfill waste.

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