KR102123818B1 - Treating method of solid wastes using hydrothermal carbonization - Google Patents

Abstract

According to an embodiment of the present invention, a solid waste treatment method using hydrothermal carbonization is performed by using a solid waste treatment system comprising: a boiler for producing steam by heating water; a hydrothermal carbonization reactor for performing a hydrothermal treatment by applying steam generated in a boiler to solid waste disposed therein; a washer for washing a carbonization reaction product produced in the hydrothermal carbonization reactor; a dehydrator for dehydrating the carbonization reaction product washed in the washer; and a dryer for drying the carbonization reaction product dehydrated in the dehydrator. The solid waste treatment method comprises the steps of: producing steam by heating water received in the boiler; performing a hydrothermal treatment by applying the steam after feeding solid waste into the hydrothermal carbonization reactor; removing inorganic chlorine included in the carbonization reaction product by washing the carbonization reaction product produced in the hydrothermal carbonization reactor; dehydrating, by the dehydrator, the carbonization reaction product from which inorganic chlorine has been removed; and drying, by the dryer, the carbonization reaction product from which inorganic chlorine has been removed. According to the present invention, various types of organic waste can be efficiently treated in a short time.

Description

TREATING METHOD OF SOLID WASTES USING HYDROTHERMAL CARBONIZATION}

The present invention relates to a method of treating various solid wastes such as municipal wastes, medical wastes, and food wastes, and specifically, to a method for treating solid wastes using a hydrothermal treatment method.

Due to industrial development, urban waste, medical waste, food waste, sewage sludge, and manure are continuously increasing, and in recent years, many studies on solid waste disposal have been conducted in the context of environmental issues.

Conventional solid waste treatment methods are mainly incineration, landfill, drying, composting, and feed treatment, but excessive investment costs, emission of harmful gases, long-term treatment time, and secondary environments such as wastewater generated during treatment There is a problem that it can cause problems.

In particular, in the case of the composting treatment method, it is difficult to completely sterilize pathogens, and in the case of the incineration treatment method, there is a high possibility that dioxins, nitrogen oxides (NOx), sulfur oxides (SOx), and dusts are likely to occur.

Therefore, there is a need for an efficient method for treating solid waste that can overcome the above-described problems.

On the other hand, the following prior art documents disclose a technical content of a combustor having a plurality of solid waste distribution units for household waste, and not the technical subject matter of the present invention.

Republic of Korea Registered Patent Publication No. 10-0994174

A solid waste treatment method using hydrothermal carbonization according to an embodiment of the present invention aims to solve the problems described above.

It is to propose a solid waste treatment method that can efficiently treat various types of organic waste such as urban waste, medical waste, and food waste in a short time.

In addition, it is to propose a solid waste treatment method that can be used as a solid fuel, soil improver and compost after the treatment by producing a fuel-type product having a high energy by the treatment of solid waste.

In addition, by introducing a process of removing inorganic chlorine contained in the carbonization reaction product after the hydrothermal treatment, if the final processed product is converted to solid fuel in the future, it can suppress the emission of harmful substances such as dioxins that may occur during combustion. It is to propose a waste disposal method.

The problems of the present invention are not limited to those mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

The method for treating solid waste using hydrothermal carbonization according to an embodiment of the present invention is a boiler that generates steam by heating water, and heat-hydrocarbon treatment is performed by applying steam generated in the boiler to solid waste disposed therein And a dryer for drying the carbonized reaction product dehydrated in the dehydrator, and a centrifugal water washing reactor generated in the hydrothermal reactor, and a dehydrator for dehydrating the carbonized reaction product washed in the centuries. A solid waste treatment method using a solid waste treatment system comprising: heating the water contained in the boiler to generate steam; Performing a hydrothermal carbonization treatment by adding solid waste to the hydrocarbon reactor and then applying the steam; Removing the inorganic chlorine contained in the carbonization reaction product by washing the carbonation reaction product produced in the hydrothermal carbonization reactor; And a step in which the dehydrator dehydrates the carbonized product from which inorganic chlorine has been removed, and the dryer dries the carbonized product from which inorganic chlorine is removed.

Preferably, the solid waste treatment system further includes a condenser for condensing the steam having undergone the carbonization reaction process of the hydrothermal hydrocarbon reactor, and a waste water purification processor for purifying water condensed in the condenser.

Further comprising a screen device for screening the carbonized product dried in the dryer to produce a fuel-type product; further comprising, after the step of drying the carbonized product, the screening device screens the carbonized product to produce a fuel-type product It is preferable to further include; calculating the.

The method of treating solid waste using hydrothermal carbonization according to an embodiment of the present invention is an environmentally friendly policy by converting various types of solid waste into fuel-type products having high energy and removing harmful substances such as residual chlorine through hydrothermal carbonization. And recycling policy.

In addition, since solid waste can be disposed of in a short time, there is an advantage of high treatment efficiency and easy operation and maintenance.

In particular, in the treatment of chlorine-based wastes such as PVC, the hydrothermal reaction proceeds at 200 to 220° C., which is a temperature lower than 300° C., which is the temperature at which dioxins can be produced, and thus has excellent environmental properties. Since chlorine is converted to inorganic chlorine, there is an advantage in that chlorine inherently removed by only washing with water, which is a subsequent process, can be significantly removed.

The effects of the present invention are not limited to those mentioned above, and other effects that are not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a conceptual diagram briefly showing a solid waste treatment system for a solid waste treatment method using hydrothermal carbonization according to an embodiment of the present invention.
2 is a flowchart showing a time-series specific method for treating solid waste using hydrothermal carbonization according to an embodiment of the present invention.
3 is a flowchart showing a time-series specific method for treating solid waste using hydrothermal carbonation according to another embodiment of the present invention.
FIG. 4 is a view showing a hydrothermal hydrocarbon reactor in the solid waste treatment system of FIG. 1.
FIG. 5 is a block diagram briefly showing the detailed configuration of a control module in the solid waste treatment system of FIG. 1.
6 is a view showing a deodorizing module in the solid waste treatment system of Figure 1;

A preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings, but the same or similar elements will be given the same reference numbers regardless of the reference numerals, and redundant descriptions thereof will be omitted.

In addition, in the description of the present invention, when it is determined that detailed descriptions of related known technologies may obscure the subject matter of the present invention, detailed descriptions thereof will be omitted. In addition, it should be noted that the accompanying drawings are only for easy understanding of the spirit of the present invention and should not be interpreted as limiting the spirit of the present invention by the accompanying drawings.

Hereinafter, a method for treating solid waste using hydrothermal carbonization according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6.

A solid waste treatment method using hydrothermal hydrocarbon according to an embodiment of the present invention relates to a solid waste treatment method using the solid waste treatment system shown in FIG. 1, wherein the solid waste treatment system is as shown in FIG. 1. It includes a boiler 100, a hydrothermal reactor 200, a centrifugal 300, a dehydrator 350 and a dryer 400.

Boiler 100 performs the function of generating steam by heating water, and the hydrothermal carbonization reactor 200 is configured to apply heat generated by the boiler 100 to solid waste disposed therein to perform hydrothermal treatment. to be.

Hydrothermal treatment is a method of producing carbonized products by treating organic wastes to be treated at a temperature of about 180 to 220° C. and a pressure of about 18 to 22 bar. Specifically, hydroxide ions (OH-) and hydrogen ions in organic molecules This is the process of extracting (H+) and resynthesizing it with water.

The dehydrated organic material is formed of a new polymer material, and is mainly transformed into a carbon-rich form, which is the same as the naturally occurring coal production process.

As described above, during the hydrothermal treatment process, oxidized ions and hydrogen ions are separated and extracted, and a considerable amount of energy is released in the process where these ions are resynthesized into water (exothermic reaction) again, and the energy is used for the thermohydrocarbonation reaction. Therefore, it can be said that only minimal energy is required.

The hydrothermal hydrocarbon reactor 200 includes a body housing 210 as shown in FIG. 4, and a solid waste inlet 220 for introducing solid waste into the body housing 210 on one side of the body housing 210 ) And a steam inlet 230 for introducing steam generated in the boiler 100 into the body housing 210.

In addition, on the other side of the main body housing 210, the carbonization reaction product outlet 260 for transferring the carbonization reaction product generated in the hydrothermal processing process in the hydrothermal carbonization reactor 200 to the centuries 300 to be described later, and the thermal water carbonization It includes a residual steam outlet 270 for delivering residual steam remaining in the main body housing 210 or water generated during the hydrothermal treatment to the condenser 700 to be described later after the processing is completed.

In particular, the inside of the body housing 210 is provided with a stirring means 240 for stirring the solid waste inside the body housing 210 and a motor 250 for rotating the stirring means 240, through which Efficient hydrothermal treatment becomes possible.

In addition, since the hydrothermal carbonization process must be performed under a specific temperature and a specific pressure as described above, the hydrothermal hydrocarbon reactor 200 is a temperature sensor for real-time detecting the temperature and pressure inside the main body housing 210 during the thermal hydrocarbonization process ( 280) and a pressure sensor 290 is preferably provided.

The hydrothermal treatment in the hydrothermal reactor 200 is wet carbonization, whereby the organic chlorine contained in the solid waste is converted to inorganic chlorine by dehydrochlorination.

Since the inorganic chlorine is directly contained in the carbonization reaction product, when the carbonization reaction product is used as a solid fuel by dehydrating and drying it without additional post-treatment, harmful substances such as dioxin are generated when the solid fuel is burned. You can.

In order to prevent such a problem, in the solid waste treatment method according to an embodiment of the present invention, a process of washing with water after inputting the carbonized reaction product having been subjected to the hydrothermal carbonization treatment in the hydrothermal carbonization reactor 200 into the centuries 300 is performed. .

In particular, since inorganic chlorine is water-soluble, washing the carbonized product in the centuries 300 can remove more than 90% of the inorganic chlorine, and the ratio of the washed water used is about 1 to 2 times that of the carbonized product. , The remaining rinse water used for rinsing can be recycled by being supplied to the centuries 300 again.

The dehydrator 350 and the dryer 400 function to dehydrate and dry the carbonized products from which inorganic chlorine has been removed by the centuries 300, respectively. In particular, the filtrate from the dehydrator 350 is the above-described centrifugal 300 ), or may be delivered to the wastewater purification processor 750 to be described later.

Through this, a final product that can be used as a solid fuel or the like can be generated. Furthermore, a screening device 600 may be provided for screening to produce a final product of uniform particles.

Referring to each configuration of the solid waste treatment system described above, the solid waste treatment method according to an embodiment and another embodiment of the present invention will be summarized as follows with reference to FIGS. 2 and 3.

First, the method for treating solid waste using hydrocarbon according to an embodiment of the present invention includes heating water accommodated in the boiler 100 to generate steam as shown in FIG. 2 (S100), and hydrocarbon reactor 200 After inputting the solid waste in the step of performing the hydrothermal carbonization treatment by applying the steam generated in the boiler (100) (S200), the centrifugal (300) is washed with carbonization reaction product generated in the hydrothermal hydrocarbon reactor (200) The step of removing inorganic chlorine contained in the reaction product (S300), the step of dehydration 350 dehydrating the inorganic chlorine-removed carbonation reaction product (S400) and the dryer 400 of the inorganic chlorine-removed carbonization It is configured to include a step (S500) of drying the reaction product.

In addition, the solid waste treatment method using hydrocarbon according to another embodiment of the present invention is screened in the solid waste treatment method using hydrothermal hydrocarbon according to an embodiment of the present invention as shown in FIG. 3 (S600) Is included.

In the screening step (S600), the screen device 600 specifically screens the carbonization reaction product to calculate a fuel-type product, through which it is possible to generate a final product of uniform particles.

On the other hand, in the case of the re-synthesized water or residual steam during the thermal hydrocarbonization process of the solid waste in the hydrothermal hydrocarbon reactor 200, it may be contaminated in the hydrothermal carbonization process, and it is necessary to purify such water or residual steam and discharge it to the outside. .

To this end, the solid waste treatment system to which the solid waste treatment method according to an embodiment of the present invention is applied may further include a condenser 700, a waste water purification processor 750 and a deodorization module 500 as shown in FIG. Can be.

The condenser 700 performs the function of receiving and condensing the residual water or steam in the hydrothermal carbonization reactor 200 after the carbonization reaction process is completed.The residual water or steam is the residual steam outlet of the thermal hydrocarbon reactor 200 270) and then transferred to the condenser 700.

The wastewater purification processor 750 is a component that performs a function of purifying contaminants and the like contained in water condensed in the condenser 700, and the deodorization module 600 purifies and condensers in the wastewater purification processor 750 ( 700) is a configuration to remove the odor of the polluted gas generated in the condensation process.

Deodorizing module 500 is specifically connected to the outer case 510 in the form of an inner hollow box as shown in FIG. 6, and a wastewater purification processor 750 or a condenser 700 on one side of the outer case 510. It is configured to include a connection pipe 70 is provided, and the air outlet portion 90 provided on the other side of the outer case 510.

The outer case 510 is provided with a plurality of partition walls 520 on the inner side, the partition wall portion 520 is one side and the other side is spaced apart from the outer case 510, respectively, the upper side from the lower side It is configured to allow air to flow in a zigzag manner up to the air discharge portion 90.

And, the partition wall portion 520 provided at the bottom end is provided with a path blocking portion 540 to open and close the spaced part from the outer case 510, the path blocking portion 540 is connected to a predetermined motor remote In the automatic path opening and closing control is installed, the path blocking unit 540 performs a function for adjusting the throughput of the introduced pollutant gas.

In addition, the partition wall portion 520 is provided with a deodorizing unit 570 on one side or both sides at predetermined intervals.

Here, the deodorizing unit 570 is a disk board-shaped attachment portion 572 attached to the partition wall portion 520, the lamp portion 574 provided in the central portion of the attachment portion 572, and the lamp portion ( 574) is provided to be connected to the optical fiber rod 576, and is composed of a plurality of brush portions 578 are provided at predetermined intervals around the lamp portion 574.

Each lamp unit 574 is configured to be connected to a separate power supply and can be turned on, and the brush unit 578 forms a form in which a visible light-sensitive photocatalyst composition is coated on the surface. Detailed properties and effects of the visible light-sensitive photocatalyst composition are described in Korean Patent No. 1721027, and the detailed description of the visible light-sensitive photocatalyst composition is omitted.

In addition, the visible light-sensitive photocatalyst composition is preferably coated on both sides of the inner case 510 and the partition wall portion 520.

On the other hand, inside the outer case 510, along the space between the partition walls 520, that is, using the path blocking portion 540, the air outlet from the place where the lower partition wall portion 520 is opened in an open state ( 90) is provided with a motor unit 532 to allow air to flow to the side and a blower fan 534 connected to the rotation shaft of the motor unit 532.

The deodorizing module 500 discharges the contaminated air flowing into the lower side of the outer case 510 to the outside through the air outlet portion 90 side, but air flows between the upper partition wall portion of the outer case 510. By moving according to the operation of the unit 532 and the blower fan 534, the moving air passes through the visible light-sensitive photocatalyst composition to obtain a deodorizing effect.

In particular, the deodorizing effect can be obtained as much as possible by increasing the contact area between the air and the visible light-sensitive photocatalyst composition by the optical fiber rod 576 and the plurality of brush portions 578 provided in the deodorizing unit 570.

In the end, the steam or water generated during the hot water carbonization process is purified through the condenser 700, the waste water purification processor 750, and the deodorization module 500 and discharged to the outside, and the air discharge unit 90 of the deodorization module 500 is The exhaust gas discharged through is discharged to the outside through the atmospheric vent 590.

In addition, although not directly shown in FIG. 1, the purified water purified through the wastewater purification processor 750 may be supplied to the centuries 300 to recycle the purified water.

On the other hand, as described above, the hydrothermal hydrocarbon treatment performed in the hydrothermal hydrocarbon reactor 200 must be performed under an environment in which the temperature and pressure inside the hydrohydrocarbon reactor 200 are optimized, so that efficient thermal hydrocarbonization is possible. It is preferable to include a valve that is controlled by the control module 900 and the control module 900 to open and close the flow path.

The control module 900 is configured to include a temperature acquisition unit 910, a pressure acquisition unit 820 and a valve control unit 930, as shown in Figure 5, the temperature acquisition unit 910 and the pressure acquisition unit 820 ) Is a configuration that receives the temperature and pressure inside the hot water hydrocarbon reactor 200 in real time from the temperature sensor 280 and the pressure sensor 290 disposed inside the hot water hydrocarbon reactor 200, respectively.

The valve control unit 930 is configured to control opening and closing of the valve based on temperature or pressure obtained from at least one of the temperature acquisition unit 910 and the pressure acquisition unit 820.

Meanwhile, a first valve 810 and a second valve 820 may be provided in the solid waste treatment system in which the solid waste treatment method according to an embodiment of the present invention is performed, as illustrated in FIG. 1.

The first valve 810 is disposed between the boiler 100 and the hydrothermal hydrocarbon reactor 200 and functions to control the inflow of steam to the hydrothermal hydrocarbon reactor 200, and the second valve 820 is a hydrohydrocarbon reactor It is disposed between the 200 and the condenser 700 to perform the function of controlling the outflow of the residual water or steam after the completion of the hydrothermal carbonization in the hydrothermal reactor 200.

That is, when it is determined that the pressure obtained by the pressure acquiring unit 820 is smaller than the preset pressure, that is, when it is determined that the pressure is too low to perform the hydrothermal treatment, the valve control unit 930 first valve 810 By opening and closing the second valve 820, the inflow of steam into the hydrothermal hydrocarbon reactor 200 may be increased, thereby increasing the pressure inside the hydrohydrocarbon reactor 200.

Conversely, when it is determined that the pressure obtained by the pressure obtaining unit 820 is higher than a preset pressure, that is, when it is determined that the pressure is too high to perform the hydrothermal treatment, the valve control unit 930 first valve 810 May be closed and the second valve 820 may be opened to increase the flow rate of internal steam, thereby lowering the pressure inside the hydrothermal hydrocarbon reactor 200.

Furthermore, as shown in FIG. 1, the carbonized reaction product finally produced by the solid waste treatment method using hydrothermal carbonization according to an embodiment of the present invention may be recycled as fuel for heating the boiler 100 again.

The embodiments described in the present specification and the accompanying drawings are merely illustrative of some of the technical spirit included in the present invention. Therefore, the embodiments disclosed in the present specification are not intended to limit the technical spirit of the present invention, but to explain, and it is obvious that the scope of the technical spirit of the present invention is not limited by these embodiments. Within the scope of the technical spirit included in the specification and drawings of the present invention, modifications and specific embodiments that can be easily inferred by those skilled in the art are all included in the scope of the present invention. Should be interpreted.

100: boiler
200: hydrothermal reactor
300: centuries
350: dehydrator
400: dryer
500: deodorization module
600: screen device
700: condenser
750: wastewater purification treatment
810, 820: valve
900: control module

Claims (3)

The boiler for generating steam by heating water, the hydrothermal reactor for performing hydrothermal treatment by applying the steam generated in the boiler to the solid waste disposed therein, and the carbonized reaction product generated in the hydrothermal reactor Dehydrator for dehydrating the carbonized product washed in the centuries, drying machine for drying the dehydrated carbonized product in the dehydrator, and condenser for receiving and condensing water or steam remaining in the hydrothermal reactor. A wastewater purification processor that performs a function of purifying contaminants and the like contained in the condensed water in the condenser, and a deodorization module that removes the odor of the polluted gas generated during the purification process in the wastewater purification processor and the condensation process of the condenser Including,
The deodorizing module includes an inner hollow box-shaped outer case, a connection pipe provided to be connected to the waste water purification processor and the condenser on one side of the outer case, and an air discharge portion provided on the other side of the outer case,
The outer case is provided with a plurality of partition walls up and down inside, and the partition walls are configured such that air is flowable in a zigzag manner from the lower side to the upper air outlet part by forming a state in which one side and the other side are spaced apart from the outer case, respectively. ,
The partition wall portion is provided with a deodorizing unit on one side or both sides at predetermined intervals apart,
The deodorizing unit includes an attachment portion in the form of a disk board attached to the partition wall portion, a lamp portion provided in the center portion of the attachment portion, an optical fiber rod provided to be connected to the lamp portion, and a predetermined distance around the lamp portion. It includes a plurality of brush parts provided for each,
The brush portion in the solid waste treatment method using a solid waste treatment system consisting of a visible light-sensitive photocatalyst composition is coated on the surface,
Heating the water contained in the boiler to generate steam;
Performing a hydrothermal carbonization treatment by adding solid waste to the hydrocarbon reactor and then applying the steam;
Removing the inorganic chlorine contained in the carbonization reaction product by washing the carbonization reaction product produced in the hydrothermal carbonization reactor;
The dehydrator dehydrating the carbonized product from which inorganic chlorine has been removed;
Drying the carbonized product dehydrated by the dryer; And
Removing the odor of the polluted gas generated in the purification process and the condensation process using the deodorization module;
Solid waste treatment method using a hydrothermal hydrocarbon comprising a. delete The method according to claim 1,
Further comprising a screen device for screening the carbonized product dried in the dryer to calculate a fuel-type product;
After the step of drying the carbonization product,
The screen device screening the carbonization product to calculate a fuel-type product;
Solid waste treatment method using a hydrothermal carbonization further comprising.

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