KR101221851B1 - Manufacturing method for solid fuel including the carbon source mixed with binder and solid fuel thereby - Google Patents

Abstract

The present invention relates to a method for producing a solid fuel mixed with a binder material and a carbon source, and to a solid fuel produced by the method, which prevents reingression of moisture while drying the moisture-containing carbon source, The purpose of the present invention is to improve moldability and to significantly improve the economics by using a binder material from waste plastic.
In the present invention, a material containing a binder material is mixed with a solvent, kerosene, diesel, or a mixture thereof, and heated to a temperature of 150 ° C. or less to uniformly disperse the binder material in a solvent, and then the solid foreign material is filtered to obtain a binder material and a solvent. Obtaining a mixed solution of; Adding a carbon source having 10 to 80% by weight of moisture to the mixed solution and mixing the mixed solution; Solid-liquid separation of the mixture of the mixed solution and carbon source in a solid-liquid separator; and drying the solid separated in the solid-liquid separator by conduction heat transfer to obtain moisture and water in the mixture of the mixed solution and carbon source. Removing the solvent component by evaporation.

Description

Manufacturing method for solid fuel including the carbon source mixed with binder and solid fuel

The present invention relates to a method for producing a solid fuel mixed with a binder material and a carbon source and to a solid fuel produced by the method. More specifically, the present invention relates to various types of carbon sources including high-function low-grade coal or sewage sludge as fuel. The present invention relates to a method for preventing reabsorption of water during transport and storage by performing a necessary drying process after uniformly mixing the binder and the carbon source for use and manufacturing a solid fuel compact through the molding process.

Here, the binder material is not only asphalt, palm oil, coal tar, but also PE (polyethylene), PP (polypropylene), PS (polystyrene), ABS (Acrylonitrile butadiene styrene), PET (Polyethylene terephthalate) By recycling the polymer waste plastics such as to obtain the effect of controlling the calorific value of the carbon source fuel and improve the formability.

The high-moisture coal, which is largely present in Indonesia, Australia, and the United States, has not been used smoothly due to problems such as low calorific value, excessive transportation cost, and re-infiltration of moisture after drying.

Conventional domestic techniques related to the manufacture of coal briquettes include "Method for manufacturing low pollution high calorific value coal briquettes (Korean Patent Registration No. 10-0424849)", in which plastic and low carbon sources are mixed and melted to produce molded fuel through a nozzle. Can be mentioned. However, this technique does not consider the drying of moisture from the carbon source at all and mixes only the plastic and carbon source without using solvents. Particularly produced products are a mixture of plastic and coal in similar proportions and suitable for fluid bed combustion.

There are many techniques for removing moisture from coal, including Upgdading Brown Coal (UBC), Bindless Coal Briquette (BCB), Mechanical Thermal Expression (MTE), K-Fuel (K-Fuel), SynCoal, etc. The closest technology is UBC, which combines heavy water and light oil with high moisture coal to remove moisture under operating conditions above 150 ° C and 3.5 atm, leaving only heavy oil to remain in coal and recovering light oil. Patent 3920304). Such Japanese patents use expensive heavy oil and require high pressure and high temperature.

Therefore, while drying a carbon source containing water at a low cost, it is desired to not only prevent the repermeation of moisture of the carbon source but also to improve the formability of the carbon source.

In this regard, the present applicant has filed a patent application No. 10-2009-0018057 with the contents of "drying moisture-containing carbon source and coating method by polymer material and solid fuel coated with polymer material".

According to the prior art, a waste containing polymer material is mixed with kerosene and diesel as solvents, and heated to a temperature of 150 ° C. or less to uniformly disperse the polymer material in the solvent, and then filtered to mix the polymer material and the solvent. Obtaining a solution, adding a water-containing carbon source to the mixed solution, followed by heating to remove water, followed by heating under atmospheric pressure or reduced pressure to distill off the solvent component from the mixture of the mixed solution and carbon source.

In the above prior art, a process of removing moisture by adding a carbon source containing water to a mixed solution in which a waste material containing a polymer material and a solvent (kerosene and diesel oil) are mixed and then heating is applied. The carbon source was fried with a solvent so that solvent components such as kerosene and light oil were replaced in the pores where water was removed from the carbon source. However, this requires a lot of energy in the process after removing the solvent component, and also because the polymer has to fill the water hole in the carbon source in order to act as a binder of the molding, there was a problem that a large amount of the polymer according to the molding is required.

Accordingly, the present invention has been made to solve the above-mentioned problems of the prior art, wherein the binder component does not penetrate into the pores of the carbon source and is distributed at the pore inlet or particle surface, and the binder component is a high molecular weight material or a low-cost heavy hydrocarbon. The purpose is to drastically improve economics by using it.

In addition, the present invention is applied to the prior art (Patent Application No. 10-2009-0018057), but using a heat conduction method rather than the process of splashing the water by heating the carbon source with a solvent (kerosene and diesel) when removing the water in the carbon source. It is another object of the present invention to simplify the manufacturing process by drying the carbon source and to significantly reduce energy in the overall process.

As a technical means for achieving the above object, in the present invention, a high molecular material in a binder, for example, waste plastic, is dissolved in a solvent, and a water-containing carbon source is added to a solution containing the high molecular material dissolved in this manner. After scavenging the solvent, the process is simplified by omitting the process of frying the carbon source in oil, which is a step of removing moisture by drying only the remaining components after recovering the solvent.

In addition, while drying the separated carbon source in a thermally conductive drying device to proceed with water drying and solvent recovery at the same time, by coating the outside of the carbon source with the polymer material remaining in the process to the carbon source coated with the polymer material of interest in the present invention It is characterized by obtaining a solid fuel comprising.

Thereafter, the polymer material coated on the outside of the carbon source in the molding process serves as a binder, and thus the moldability is improved, and the molded carbon source can prevent reabsorption of moisture during the transportation and storage process.

According to the method for producing a solid fuel mixed with a binder material and a carbon source according to the present invention and the solid fuel produced by the method, the solid fuel of the carbon source by drying a low-quality carbon source containing a lot of moisture and coating the surface with a polymer material It is possible to obtain the effect of improving the moldability of the furnace, preventing reabsorption of moisture and increasing the calorific value of the produced solid fuel.

In addition, in the prior art, a process in which wastes containing polymer materials are skipped by using solvents (kerosene and diesel) is omitted, and instead, by applying a method of removing moisture using conductive heat transfer, solvents (kerosene and diesel) are applied. The recovery energy of is small, the amount of polymer used is small, the energy of the whole process is greatly reduced, the process is simplified, the formability is improved and spontaneous ignition is prevented.

1 is a process schematic diagram of a method for producing a solid fuel mixed with a binder material and a carbon source according to an embodiment of the present invention,
2 is a block diagram of a thermally conductive drying apparatus according to an embodiment of the present invention,
3 is a perspective view of main parts of a thermally conductive drying apparatus according to an embodiment of the present invention.

The present invention relates to a method for producing a solid fuel mixed with a binder material and a carbon source, and to a solid fuel produced by the method. First, a waste containing a polymer material (binder material) is used as a solvent, kerosene, diesel, or a mixture thereof. And then, mixed with them while heating to a temperature of less than 150 ℃ to uniformly disperse the polymer material in the solvent, and then to obtain a mixed solution of the polymer material and the solvent for filtering the solid foreign matter;

A carbon source having a water content of 10 to 80% was added to the mixed solution, stirred for a predetermined time, and then solid-liquid separated (filtration) to separate the carbon source treated with the mixed solution, and the carbon source thus separated was heated by conduction heat transfer to obtain moisture and It provides a method for producing a solid fuel comprising a carbon source coated with a polymer material on the surface; the step of separating and removing the solvent component.

In the process of the present invention, the polymer material is preferably polyethylene (PE), polypropylene (PP: Polypropylene), polystyrene (PS: Polystyrene), acrylonitrile butadiene styrene (ABS), polyethylene terephthalate (PET: polyethylene terephthalate) or a mixture thereof. Waste, which is a source of such polymeric materials, is preferably waste plastic, such as waste vinyl.

In the method of the present invention, the content of the polymer substance in the mixed solution of the polymer substance and the solvent is 40% by weight or less. Such polymeric materials are used in appropriate amounts to coat the carbon source. If the amount of the polymer material is too large compared to the solvent, the problem of poor dissolution occurs, and it is appropriate to be used in an amount of 40% by weight or less.

In the process of the invention, the carbon source is sewage sludge or coal with a water content of 10 to 80% by weight.

The present invention also provides a solid fuel prepared by the method of the present invention comprising a carbon source coated with a polymeric material on its surface.

The present invention also provides coal briquettes made from the solid fuel of the present invention.

In the present invention, unlike conventional methods such as pellet production (including RPF), pyrolysis, emulsification, gasification, and incineration when recovering a polymer resin from a waste, a polymer resin is used by using a solvent. The present invention provides a method of coating a polymer resin having high calorific value while recovering water as a solution and storing it as a liquid or solid fuel, using it as a fuel, or removing moisture from a low carbon source having a high moisture content. It is a technique to increase the calorific value of the product carbon source produced by coating the polymer resin on the carbon source and to prevent the external moisture is reabsorbed to the product carbon source during storage and transportation. The present invention is that by using a polymer resin (particularly waste plastic) instead of heavy oil as in the prior art, it is possible to dramatically improve the economics and to obtain the side effect of treating waste. In addition, since it operates at normal pressure, initial investment cost and operation maintenance cost are low and safety is improved. In addition, since the polymer resin such as waste plastic is coated on the surface of the carbon source in a mixed state with a solvent, the amount of use is reduced compared to using heavy oil that penetrates into the pores of the carbon source.

In addition, by applying a method of removing water by conduction heat transfer instead of using a solvent (kerosene and diesel) to remove moisture at high temperatures, the recovery energy of the solvent (kerosene and diesel) is small, and a polymer The amount is low, the energy of the whole process is greatly reduced, the process is simplified, the formability is improved and spontaneous ignition is prevented.

At this time, the heat conduction type drying apparatus used in the conductive heat transfer method is provided with a disk-shaped disk of a metallic material in the lower part of the drying chamber, and a heating means such as a heating plate or a burner is provided in the lower part of the disk-shaped disk to heat the disk-shaped disk. It is to generate a, the disk-shaped disk has a configuration in which the stirring blade is rotated, the solid object is accommodated on the disk-shaped disk to generate the conductive heat and mixed through the rotation of the stirring blade to achieve a quick drying.

In addition, the disk-shaped disk is heated to 60 ℃ ~ 140 ℃, the stirring blade is rotated at a speed of 0.1rpm ~ 10rpm to allow even drying to the solid object, the drying time is to last for 5 to 30 minutes This is preferred.

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

1 is a process schematic diagram of a method for producing a solid fuel mixed with a binder material and a carbon source according to an embodiment of the present invention.

In the present invention, the waste vinyl and the solvent (kerosene and diesel) are put into the first mixing tank 10 and sufficiently stirred, and then the mixed solution in which the waste vinyl and the solvent are sufficiently mixed is heated while raising the temperature to 150 ° C.

Thereafter, the mixed solution is separated and removed from the foreign matter using the filter 20 and then transferred to the second mixing tank 30. At this time, the raw material carbon source of high moisture is also added to the second mixing tank 30 and stirred to sufficiently mix the mixed solution and the raw material carbon source.

Next, the solid and liquid components are separated by transferring the mixed solution containing the source carbon source to the solid-liquid separator (filter) 40, and the separated solid components are transferred to the thermally conductive drying apparatus 50, and the liquid The component is conveyed to the cooling tank 60.

The solid separated through the solid-liquid separation process is accommodated in the thermally conductive drying device 50 and undergoes a drying process. The thermally conductive drying device 50 heats the solid to the solid by heat conduction on the heated disc-shaped disc. The transfer was to be made to dry, the disk was rotated on the stirring disk was rotated to allow even drying. At this time, the water and kerosene in the liquid state in the drying process to be vaporized at the same time the gas is delivered to the cooling tank (60).

Thereafter, the carbon source of the solid component, which is a residue of the thermally conductive drying process, is recovered as a solid fuel, and the solid fuel obtained through the process is molded by pressing the mold at a constant pressure and passing the mold to coat the surface with a polymer material. The production of a solid fuel containing a carbon source is completed.

In addition, in the present invention, the liquid component separated through the solid-liquid separation process and the vaporized gas component through the thermally conductive drying process are transferred to the cooling tank 60 to cool the liquid component and condense the gas component. The condensed and cooled liquid component is passed through the oil-water separator, the oil component is recovered as a solvent, re-introduced into the first mixing tank, and the separated water is transferred to the sewage treatment apparatus.

Waste carbon sources, such as low grade coal and sewage sludge, which contain too much water, are not only low in utilization, but also have a high cost of treatment. As a result, waste of resources and costs is great, so it is used as a raw material for coal briquettes, thereby contributing to national resource utilization and securing energy resources. In addition, by using waste plastic that is a landfill and incineration treatment to cause environmental pollution to date, it intends to suppress the increase in cost caused by the drying of moisture. In order to achieve the above object, the optimum combination of the polymer resin and the solvent and the optimum operating conditions should be derived. Operating conditions include temperature, pressure, and the form of polymer resins. In general, the solvent is most commonly used kerosene or diesel in consideration of price, safety, supply and demand. Here, it is most important how the polymer resin is mixed in what form and at what temperature. In the case of waste vinyl, when mixed with kerosene in a proportion and heated to less than 150 ℃, all the vinyl components are dissolved into a homogeneous solution. Similarly, in the case of other polymer resins, it is possible to make a uniform solution. In order to increase the dissolution rate, it is advantageous to add a thin film (or thin slice) such as vinyl. The viscosity of the homogenized solution depends on the temperature and the mixing ratio and therefore may vary depending on the application.

The present invention is a low-grade carbon source produced at home and abroad and polymers such as PE (Polyethylene), PP (Polypropylene), PS (Polystyrene), ABS (Acrylonitrile butadiene styrene), PET (Polyethylene terephthalate), etc. It is composed of a process of preparing a solution in which a resin and a solvent are mixed at a constant ratio, a drying process of removing moisture from a low-grade carbon source, and a technique of manufacturing a high calorific coal by leaving a high molecular material together with the carbon source.

By coating the surface of the low-grade carbon source with a high molecular material, it prevents the repermeation of moisture during storage and transportation, and at the same time, the high molecular material is first vaporized and combusted during combustion to help the ignition. In addition, by adjusting the ratio of mixing the solvent and the polymer, it is possible to adjust the calorific value of the solid fuel finally formed.

According to the present invention, by drying a low-grade carbon source containing a lot of moisture and coating the surface with a polymer material, it is possible to obtain the effect of improving the moldability to a solid fuel, preventing resorption of moisture and increasing the calorific value of the generated fuel. have. The coal briquettes are developed by utilizing low-grade coal, such as Indonesia and Australia, which are low in fuel value due to their high moisture content, which contributes to the development of important energy, as well as the fuelization of sewage sludge, which is prohibited from dumping at sea, and the waste vinyl generated from rural waste. The environmental pollution prevention effect of processing can also be obtained.

While the existing technology leaves heavy oils in the pores of coal, the manufacturing cost increases and there is a risk of volatilization and ignition of heavy oils, while in the present invention, the amount of used by coating the surface of the solid carbon source with a polymer material such as waste plastic or waste vinyl And reduced manufacturing costs, and concerns about volatilization and spontaneous firing of the coated polymers have been significantly reduced. In addition, since waste plastic is used as a raw material, it is possible to obtain additional economic benefits due to environmental pollution improvement. When molding the dried solid carbon source in the form of granules, the polymeric material coated on the surface serves as a binder, and since the bonding strength of the polymeric material is superior to heavy oil at room temperature, moldability can be further improved.

Hereinafter, although this invention is demonstrated concretely with reference to an Example, this invention is not limited by this.

<Examples>

5 g of waste vinyl and 1 L of light oil solvent were added to the first mixing tank, and the vinyl component was dissolved while mixing and heating up to 150 ° C. at a rate of 10 ° C./min.

◎ When the mixed solution produced through the above process is homogenized, foreign substances were separated and removed using a filter.

◎ The filtered mixed solution is transferred to the second mixing tank. At this time, 1000g of the high moisture raw material carbon source is added to the second mixing tank and mixed.

After 15 minutes of mixing using an agitator, the mixed solution and the raw carbon source mixture were transferred to a solid-liquid separator.

The solid component separated in the solid-liquid separator was transferred to a thermally conductive drying apparatus and dried, and the liquid component was transferred to a cooling bath.

◎ The thermally conductive drying device accommodates the solid on the disk-shaped disk heated to 80 ° C., and the stirring disk rotates at the speed of 0.5rpm on the disk-shaped disk to allow even drying. The drying time lasts for 10 minutes. It was.

◎ The vaporized gas component was transferred to the cooling tank and liquefied together with the drying process of the solid, and the dried residue was recovered as a solid fuel.

◎ The solid fuel obtained through the above process was molded by pressing and passing through a forming mold to form a final solid fuel molding having a constant shape.

◎ In addition, the liquid transferred through the solid-liquid separation and the gas transferred during the heat-conductive drying process are liquefied in a cooling tank, the liquid component is passed through the oil-water separator, and the oil component is recovered as a solvent and is returned to the first mixing tank. The solvent was reused because the separated water was transferred to a sewage treatment device.

The thermally conductive drying apparatus is to evaporate the moisture of the solid by the thermal conductivity method, the configuration is as shown in Figs.

As described above, the thermally conductive drying apparatus 50 is provided with a disc-shaped disk 52 made of a metal material under the drying chamber 51, and a heating means 53 such as a heating plate or a burner is provided below the disc-shaped disk 52. It is provided to generate the conductive heat by heating the disk-shaped disk 52, the disk-shaped disk 52 has a configuration that includes a rotating stirring blade 54. That is, the solid object is accommodated on the disk-shaped disk 52 that generates the conductive heat and mixed through the rotation of the stirring blade 54 to achieve fast drying.

In addition, the dried solid fuel is pressurized at a constant pressure to pass through the molding die, and the polymer resin component plays a role between the solid fuel particles and the particles and covers the outer surface of the molded fuel to absorb additional moisture. Function to prevent it. In addition, the polymer resin component coated on the surface is first vaporized by burning when the solid fuel is burned, thereby increasing the temperature of the solid fuel, thereby improving the combustion efficiency of the solid fuel.

<Experimental Example>

In this experiment, the water content was measured by comparing the dried foods and the dried foods using the heat conduction method for the carbon source containing water.

Comparative example

700 g of water with 30.91% of coal is mixed with 0.7 liter of kerosene and heated to 130 ° C. for 30 minutes, followed by frying and drying. The solid coal is separated from the filter, and then to 130 ° C. in a disk dryer rotating at 0.45 rpm. Coal obtained by drying was used as a comparison target.

Example

700 g of coal having a water content of 30.91% was mixed with 0.7 liters of kerosene at room temperature for 10 minutes, and the solid coal was separated from the filter, and then dried at 130 ° C. in a disk dryer rotating at 0.45 rpm. Used.

Experimental results of coal water content measurement using coal dryer
Sample type
Moisture content before drying (%)
Moisture content after drying (%)
Example: Mixed-Filter-Disk Drying
30.91
1.39
Comparative Example: Mixed-Frying Drying-Filter-Disk Drying
30.91
2.23

(Coal: 700g Kerosene 0.7 ℓ, Disk Dryer: 0.45 rpm)

As a result of comparing the final moisture content of the coal through the experiment it can be seen that the moisture content of the coal did not go through the fry drying process is rather smaller. In addition, the entire process time was 35 minutes or more if the frying drying process was completed, but it was found that the complete process in 15 minutes without the frying drying process.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. And can be modified and changed.

10: first mixing tank 20: filter
30: second mixing tank 40: solid-liquid separator
50: heat conductive drying apparatus 51: drying chamber
52 disc disk 53 heating means
54: stirring blade 60: cooling tank
70: oil-water separator

Claims (13)

delete delete The waste containing the binder material is mixed with kerosene, diesel, or a mixture thereof, and heated to a temperature of 150 ° C. or lower to uniformly disperse the binder material into the solvent, and then the solid foreign material is filtered to mix the binder material and the solvent. Obtaining a;
Adding a carbon source having 10 to 80% by weight of moisture to the mixed solution and mixing the mixed solution;
Solid-liquid separation of the mixture of the mixed solution and carbon source in a solid-liquid separator; and
And heating and drying the solid separated in the solid-liquid separator by conducting heat transfer to evaporate and remove moisture and solvent components from the mixture of the mixed solution and the carbon source.
In the drying process of the conductive heat transfer method, a thermally conductive drying device is applied, which is provided with a disk-shaped disk made of a metal material in the lower part of the drying chamber, and a heating means is provided in the lower part of the disk-shaped disk to conduct conduction heat by heating the disk-shaped disk. Is formed, the stirring blade to rotate on the disk-shaped disc is formed, characterized in that the solid object is accommodated on the disk-shaped disk to generate the conductive heat and mixed through the rotation of the stirring blade to achieve rapid drying A process for producing a solid fuel in which a binder material and a carbon source are mixed.
The method of claim 3, wherein
In the drying process of the conductive heat transfer method, the solid is accommodated in the upper portion of the disk-shaped disk heated to 60 ~ 140 ℃, the stirring disk is rotated at a speed of 0.1 ~ 10rpm above the disk-shaped disk can be mixed evenly dried The drying time is 5 to 30 minutes to produce a solid fuel mixed with a binder material and a carbon source.
The method of claim 3, wherein
The binder material is polyethylene (PE: Polyethylene), polypropylene (PP: Polypropylene), polystyrene (PS: Polystyrene), acrylonitrile butadiene styrene (ABS), polyethylene terephthalate (PET: polyethylene terephthalate) A method for producing a solid fuel mixed with a binder material and a carbon source, characterized in that any one of a polymer material and palm oil, asphalt, coal tar is applied, or a mixture of at least two binder materials.
The method according to any one of claims 3 to 5,
A method for producing a solid fuel mixed with a binder material and a carbon source, characterized in that the content of the binder material in the mixed solution of the binder material and the solvent is 40% by weight or less.
The method according to any one of claims 3 to 5,
A method for producing a solid fuel mixed with a binder material and a carbon source, characterized in that the carbon source is sewage sludge or coal having a water content of 10 to 80% by weight.
A solid fuel in which a binder material prepared by the method according to claim 3 or 4 is mixed with a carbon source.
The method of claim 8,
The binder material is a polymer such as polyethylene (PE: Polyethylene), polypropylene (PP: Polypropylene), polystyrene (PS: Polystyrene), acrylonitrile butadiene styrene (ABS), polyethylene terephthalate (PET) A solid fuel mixed with a binder material and a carbon source, characterized in that any one of the material and palm oil, asphalt, coal tar is applied, or a mixture of at least two binder materials.
The method of claim 8 ,
A solid fuel comprising a carbon source coated with a binder material on a surface, wherein the carbon source is sewage sludge or coal having a water content of 10 to 80% by weight.
Coal briquettes prepared from the solid fuel of claim 8 .
The method of claim 3, wherein
The solid fuel heat-dried by the conductive heat transfer method is pressurized to a constant pressure to pass through the mold to form a final solid fuel molding, characterized in that the binder material and the carbon source is a method for producing a solid fuel mixed.
A solid fuel mixed with a binder material prepared by the method of claim 12 and a carbon source.

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