KR20240122965A - A low-temperature pyrolysis regenerative resource recovery device using saturated steam and superheated steam - Google Patents

Abstract

The present invention relates to a low-temperature pyrolysis regenerative resource recovery device using saturated steam and superheated steam, and more specifically, to a low-temperature pyrolysis regenerative resource recovery device using saturated steam and superheated steam, which suppresses oxidation and explosion of heated materials such as waste vinyl, waste plastic, and marine waste by cycloneizing the steam flow inside the pyrolysis furnace to release residual oxygen and treat them under a low-oxygen state, has a fast heat transfer rate and extends the residence time due to the effects of pressure and temperature to increase oil yield, prevents condensation of superheated steam by reprocessing through recycling of wax and tar, maintains combustion oil at an optimal temperature for combustion to stabilize the burner flame, removes environmental pollutants by high-temperature combustion of exhaust gas and odor using carbides, excess non-condensable gas, and pyrolysis oil as an energy source, and prevents gas explosion by preventing pyrolysis gas from being liquefied and solidified in front of a condenser, and prioritizes safety, and is environmentally friendly and efficient.

Description

{A low-temperature pyrolysis regenerative resource recovery device using saturated steam and superheated steam}

The present invention relates to a low-temperature pyrolysis regenerative resource recovery device using saturated steam and superheated steam, and more specifically, to a low-temperature pyrolysis regenerative resource recovery device using saturated steam and superheated steam, which suppresses oxidation and explosion of heated materials such as waste vinyl, waste plastic, waste tires, waste rubber, and marine waste by cycloneizing the steam flow inside the pyrolysis furnace to release the remaining oxygen and process them under a low-oxygen condition, has a fast heat transfer rate and extends the residence time due to the effects of pressure and temperature to increase the oil yield, prevents condensation of superheated steam by reprocessing through recycling of wax and tar, maintains the combustion oil at the optimum temperature for combustion to stabilize the burner flame, removes environmental pollutants by high-temperature combustion of exhaust gas and odor using carbides, excess non-condensable gas, and pyrolysis oil as an energy source, and prevents gas explosion by preventing pyrolysis gas from being liquefied and solidified in front of a condenser, and prioritizes safety, and is environmentally friendly and efficient.

Currently, greenhouse gases and fine dust are recognized as problems regardless of national borders, and policies to protect the environment for the benefit of each country are being strengthened. In particular, indiscriminately discarded waste is one of the main causes of global pollution, causing headaches for all countries. In addition, discarded plastics break down into small pieces in nature and flow into the ocean and rivers as microplastics (less than 5 mm). Microplastics become food for fish and birds, disrupting the ecosystem and ultimately lowering our quality of life. Approximately 4.8 to 12 million tons of plastics flow into the ocean, mainly containing PE, PP, and nylon. Therefore, reduction technologies are being developed to fundamentally block the flow of microplastics into the ocean.

Plastics take tens to hundreds of years to decompose when landfilled, and when incinerated, they cause secondary air pollution or emit harmful gases, so recycling waste plastics is very important.

The recycling method of waste plastics can be largely divided into chemical recycling, physical recycling, and thermal recycling. In order to recycle waste plastics, it is very important to separate and sort the waste plastics generated by type. Waste plastics sorted by type can be produced into recycled products through physical crushing and solidification, and can be recycled as materials. In the case of waste plastics containing a large amount of foreign substances, it is difficult to physically recycle them or they cannot be recycled into high value-added products, so chemical raw materials can be recovered through chemical recycling and recycled as raw materials. In cases where physical or chemical recycling is difficult, thermal recycling can be used as an energy source, or they can be recycled through pyrolysis to emulsify and gasify them.

Pyrolysis emulsification technology has been distributed to the market since the early 1990s through basic research, and is currently a small-scale business in the form of manual labor that requires a lot of labor. In addition, various catalysts have been developed and used to shorten wax removal and reaction time, and in the case of batch method, the total operating time per cycle is approximately 20 to 30 hours (operation time 11 to 18 hours, cooling time 10 hours). The yield of selected products after removing foreign substances, drying, and crushing processes is investigated to be 40 to 60%, and that of unselected products is 30% or less.

Therefore, despite the high market demand for eco-friendly treatment and energy conversion of waste plastics, the absence of commercial-scale pyrolysis technology suitable for domestic conditions is an obstacle to business expansion. Therefore, the development of pyrolysis emulsification technology that is suitable for domestic conditions and overcomes technological limitations is urgently needed.

Plastics are made by decomposing naphtha obtained by fractional distillation of crude oil. Therefore, the main components of plastics are carbon and hydrogen, like petroleum, and can basically be turned into fuel through thermal decomposition. However, plastics are used for various purposes, and additives are added to create polymer units with properties suitable for the purpose. Therefore, there are various types of plastics even among plastics intended for use as fuel, and they exhibit different fuel properties depending on the type of plastic. In the case of polyvinyl chloride (PVC) or PET, they are made by chemically combining chlorine and oxygen, respectively, so chlorine and oxygen account for a significant portion of the mass.

On the other hand, polyethylene (PE) and polypropylene (PP) are composed only of carbon and hydrogen, so they do not produce harmful substances such as dioxin or hydrogen chloride when burned, and thus exhaust gas can be controlled by applying the existing technology to reduce harmful exhaust gases from gas or oil fuels. These two types of plastics account for approximately 64% of the total plastic usage.

Unlike the general incineration technology for combustible waste, the pyrolysis emulsification technology does not generate hazardous substances such as dioxin during the pyrolysis process, minimizes secondary pollution such as wastewater or waste, and can produce more than 70% of the energy potential of polymer waste in the form of high-value-added, high-grade fuel oil as a substitute for diesel.

In this respect, for polymer waste, especially waste plastic, pyrolysis emulsification technology can be evaluated as the most environmentally friendly, economically efficient, and effective recycling technology, and its combustion characteristics are as follows.

Combustion characteristics of plastics division Flash point (℃) Decomposition temperature (℃) Calorific value (kcal/kg) PAN 340 250~280 8,300 PET 390 285~305 5,500 HDPE 340 335~450 11,110 PP 375 328~410 11,064 PS 350 285~440 9,620 AS 366 250~280 8,600 Polycarbonate 467 420~620 7,290 Polyamide 390 310~380 7,370 PVC 390 200~300 4,500 Wood and paper 230 140~240 4,600

Pyrolysis emulsification is a technology that converts polymer waste (which has low thermal conductivity and requires a relatively long decomposition time) such as waste plastic, waste tires, waste vinyl, waste rubber, and waste fishing nets into liquid fuel through a pyrolysis process that breaks the carbon chains that make up the polymer raw material and decomposes it into low molecules in a relatively low temperature range of approximately 350–450°C (melting temperature is 250–300°C, pyrolysis temperature is 350–450°C) by applying external heat under anaerobic conditions. The oil produced is mainly used as an industrial alternative fuel, a petrochemical raw material, or to generate electricity by operating a generator.

The emulsifier that pyrolyzes waste plastics mainly uses a batch method that heats and melts waste in a pyrolysis furnace, but waste vinyl or waste plastics that are brought in in a compressed state are moved by a forklift and put into the pyrolysis furnace, and the worker directly bolts the fixing bolts of the inlet with a tool to open and close them for a long time, and the worker manually ignites the burners of the heating device. After preparing the fluid flow of the oil or gas pipes, multiple burners are ignited and heated. Depending on the situation, only the ignited burner area is heated, so that uniform heat transfer does not occur, and contact heat transfer does not occur well. Since a small amount of pyrolysis gas is discharged and the flow rate is low, condensation and solidification occur in the pipes, which reduces the yield. After cooling for a long time after operation, the residues remaining in the pyrolysis furnace are removed, and then raw materials are re-injected. It is difficult to process pollutants contained in the exhaust gas discharged because the combustion of the burner of the heating device is unstable. The temperature of the pyrolysis gas in front of the condenser must be higher than 100℃ to form a flow. As the temperature drops, condensation and solidification occur in the pipes, causing blockages. This requires frequent maintenance and creates repeated difficulties in operation due to the generation of foul odors.

That is, the conventional pyrolysis emulsification process has a long pyrolysis time, and in the case of PE decomposition, wax is generated and the pyrolysis gas solidifies after cooling and condensation in the pipe in front of the condenser, causing the pipe to close and high-boiling-point oil is generated, and the heat transfer is reduced due to coking on the heat-conducting surface inside the reactor, and sufficient cooling is required to discharge the pyrolysis residue, and there are problems such as the advanced exhaust gas pollutant treatment facility of the pyrolysis heating furnace and the generation of an unpleasant odor when the pyrolysis oil and non-condensed gas are burned.

1. Domestic registration patent no. 10-0609316

2. Domestic registration patent no. 10-1916128

The present invention is to solve the above-mentioned problems, and the purpose of the present invention is to provide a low-temperature pyrolysis regeneration resource recovery device using saturated steam and superheated steam, which can suppress oxidation and explosion of a heated material by cycloneizing the steam flow inside a pyrolysis furnace to release the remaining oxygen and treat it in a low-oxygen state, and has a fast heat transfer rate and increases oil yield by extending the residence time due to the effects of pressure and temperature.

Another object of the present invention is to provide a low-temperature pyrolysis regenerative resource recovery device using saturated steam and superheated steam capable of removing odor by burning it at high temperature.

Another object of the present invention is to provide a low-temperature pyrolysis regenerative resource recovery device using saturated steam and superheated steam, which produces medium-temperature water by burning an energy source at high temperature, and maintains the temperature of the pyrolysis oil pipe and the pyrolysis gas pipe as a medium-temperature double pipe to prevent condensation and solidification by stably heating the burner combustion and the pyrolysis gas pipe.

Another object of the present invention is to provide a low-temperature pyrolysis regenerative resource recovery device using saturated steam and superheated steam, which can use surplus non-condensable gas generated in a pyrolysis process, combusted and discharged to the atmosphere, and carbides that must be processed externally as energy sources.

The present invention is a means for achieving the above-mentioned purpose, and comprises a regenerative resource recovery device comprising a raw material input device, a pyrolysis device, a pyrolysis gas treatment device, a condensation device, a non-condensed gas purification and backfire prevention device, an oil storage tank, and an exhaust gas treatment device.

The above raw material input device is composed of a raw material inlet and storage for compressed raw materials made of waste vinyl and waste fishing nets that have undergone a preprocessing process, a mobile hydraulic multi-stage raw material input device, and a raw material input and transfer device.

The above pyrolysis device is composed of a pyrolysis furnace that supplies superheated steam to waste raw materials supplied through an inlet from the above raw material input/transport device to perform pyrolysis, and a superheated steam supply device that supplies superheated steam to the pyrolysis furnace.

The above pyrolysis gas treatment device includes a differential screw conveyor for transporting and discharging tar separated from the pyrolysis gas discharged during the pyrolysis process to the outside, a gas separator connected to the differential screw conveyor for separating the pyrolysis gas discharged together with the tar, a moisture separator for separating moisture including tar from the pyrolysis gas, a multi-stage wax collector for separating and collecting wax from the pyrolysis gas from which the tar and moisture have been separated, and a re-injection device configured to re-inject the separated and collected tar and wax into the pyrolysis device for reprocessing, and the pyrolysis gas pipe to the condenser is configured to be installed as a double pipe using medium-temperature water to prevent condensation in the pipe.

The above condensing device is composed of a multi-stage condenser, a drain tank, a cooling tower, a cooling water storage tank, and a collection and separation tank that collects condensed oil components to separate moisture, and the pyrolysis gas in which wax is collected from the multi-stage wax collector is condensed into oil through a condensation process using cooling water and stored in a drain tank, then collected in a collection and separation tank and stored in an oil storage tank after passing through a filter, thereby providing a low-temperature pyrolysis regeneration resource recovery device using saturated steam and superheated steam.

In addition, the superheated steam supply device of the pyrolysis device is characterized by being composed of a saturated steam supply device that supplies saturated steam, a moisture filter that filters the saturated steam, a pressure reducing valve that reduces the pressure of the saturated steam to increase the dryness, a superheated steam generator that generates superheated steam and supplies it to the pyrolysis furnace through a pipe, and a bypass pipe that supplies the saturated steam directly to the pyrolysis furnace without passing through the superheated steam generator depending on the raw material of the waste.

In addition, the pyrolysis furnace is characterized in that the external supply pipe is insulated to prevent condensation of the superheated steam supplied thereto, and a superheated steam condensation prevention section is formed by a blocking space that reduces temperature loss to the outside, and a burner heating device that maintains a constant temperature by indirect heat is installed in the superheated steam condensation prevention section, and the burner heats the non-condensed gas generated in the pyrolysis process and the pyrolysis oil that is maintained at a constant temperature by a double piping of medium temperature water as initial fuel, and when the heating conditions are established, it heats it as a non-condensed gas.

In addition, the inlet of the pipe through which superheated steam is supplied to the pyrolysis furnace is formed at an upper side off the center, and the pipe is reduced (axially compressed) to increase the supply velocity of the expanded superheated air, and the pipe is divided into four points perpendicular to the outer diameter of the pyrolysis furnace so that the expanded superheated steam inside the pyrolysis furnace can form a cyclone.

According to the present invention, the oxidation and explosion of the heated object can be suppressed by improving the input method and releasing the remaining oxygen through the steam flow inside the pyrolysis furnace, the heat transfer rate is fast and the residence time is extended to increase the oil yield, the burner flame is stabilized to prevent condensation of superheated steam by recirculating the reactants and maintaining the combustion oil at the optimum temperature for combustion, and the residue and excess non-condensable gas are used as an energy source to remove environmental pollutants by high-temperature combustion of exhaust gas and odor, and the pyrolysis gas is prevented from liquefying and solidifying, thereby minimizing the time required to inspect the pipeline and equipment. In addition, the improvement of the raw material input method eliminates worker fatigue and shortens the input time, and the reaction time can be shortened by stabilizing the burner flame by recirculating the reactants and maintaining the combustion oil at the optimum temperature for combustion.

In addition, according to the present invention, by using residue and surplus non-condensable gas as energy sources, exhaust gas and odor are combusted at high temperatures by a high-temperature cyclone combustion device to remove environmental pollutants while producing medium-temperature water, and by configuring the pyrolysis oil pipeline and the pyrolysis gas pipeline as medium-temperature water double pipes, solidification due to liquefaction of the pyrolysis gas is prevented, thereby providing the effect of giving priority to safety, such as preventing gas explosions, by only performing a pipeline inspection.

Figure 1 is a block diagram according to one embodiment of the present invention.
Figure 2 is a specific flow sheet according to one embodiment of the present invention.
Figure 3 is a configuration diagram showing the separation and recirculation of pyrolysis gas according to one embodiment of the present invention.
Figure 4 is a configuration diagram of a high-temperature exhaust gas treatment device according to one embodiment of the present invention.
Figure 5 is a configuration diagram of a superheated steam device of a pyrolysis device according to one embodiment of the present invention.
Figure 6 is a diagram showing the external structure and internal superheated steam flow of a pyrolysis furnace according to one embodiment of the present invention.

Hereinafter, a saturated steam and superheated steam decomposition regeneration resource recovery device according to one embodiment of the present invention will be specifically described with reference to the drawings.

When describing embodiments of the present invention, unnecessary technical contents that are well known in the technical field to which the present invention belongs and are not directly related to the present invention are omitted for clearer delivery without obscuring the gist of the present invention.

FIG. 1 is a block diagram according to one embodiment of the present invention, FIG. 2 is a specific flow sheet according to one embodiment of the present invention, FIG. 3 is a configuration diagram showing pyrolysis gas separation and recirculation according to one embodiment of the present invention, FIG. 4 is a configuration diagram of a high-temperature exhaust gas treatment device according to one embodiment of the present invention, FIG. 5 is a configuration diagram of a superheated steam device of a pyrolysis device according to one embodiment of the present invention, and FIG. 6 is a diagram showing the external structure and internal superheated steam flow diagram of a pyrolysis furnace according to one embodiment of the present invention.

Referring to FIGS. 1 to 6, a low-temperature pyrolysis regenerative resource recovery device using saturated steam and superheated steam according to one embodiment of the present invention comprises a raw material input device (100), a pyrolysis device (200), a pyrolysis gas treatment device (300), a condensation device (400), a non-condensed gas purification and flashback prevention device (500), an oil storage tank (600), an exhaust gas treatment device (700), and an outdoor deodorization device (900).

The above raw material input device (100) is composed of an inlet (101) for compressed waste raw materials such as waste vinyl and waste fishing nets that have undergone a preprocessing process, a storage (102), a raw material input and transport device (103), and a mobile hydraulic multi-stage raw material input device (104).

The above pyrolysis device (200) is a device that supplies superheated steam to waste raw materials supplied through an inlet from the above raw material input device (100) to perform pyrolysis, and includes a pyrolysis furnace (220) and a superheated steam supply device (240) for supplying superheated steam to the pyrolysis furnace (220). The superheated steam supply device (240) is composed of a saturated steam supply device (241), a water filter (242), a pressure reducing valve (243), and a bypass pipe (245) that supplies saturated steam directly to the pyrolysis furnace (220) without passing through a superheated steam generator (244), and is formed in various shapes, such as a hexahedron or a cylinder, as a whole.

The above-described pyrolysis furnace (220) is provided with an internal space for pyrolyzing compressed raw materials and a space for the rotational flow of superheated steam, and is equipped with a screw conveyor (230) described below, which is provided with an inlet for hydraulic desorption, a hydraulic wrench for indicating torque, and a structure for continuously discharging tar and pyrolysis gas and re-injecting wax separated from the tar and pyrolysis gas captured in the moisture for reprocessing.

The inlet of the above pyrolysis furnace (220) is opened by a hydraulic automatic detachment method, and then 1/2 of the existing number of bolts are opened and then hydraulically automatically opened. When closed, the hydraulic automatic closing is performed and then 1/2 of the existing number of bolts are bolted at a constant torque using a torque indicating wrench for sealing, thereby shortening the insertion time and increasing the safety of the worker and the life of the equipment.

In addition, an overheated steam condensation prevention unit (246) that is blocked from the outside is installed on the outside of the pyrolysis furnace (220), and a burner heating device (210) that maintains a constant temperature by using a double pipe for non-condensed gas and medium-temperature water generated in the pyrolysis process is installed in the overheated steam condensation prevention unit (246) as a device that supplies an indirect heat source.

Here, the burner of the burner heating device (210) is heated using non-condensed gas generated in the pyrolysis process and pyrolysis oil maintained at a constant temperature by a double pipe of medium temperature water as fuel. Initially, oil is supplied as a heating means, and when non-condensed gas is generated and the heating condition is established, the amount of oil following the combustion control signal is gradually reduced so that the oil supply is kept to a minimum, and when the amount of non-condensed gas is reduced, the oil burner is automatically combusted and heated.

In addition, the inlet of the conduit (247) through which superheated steam is supplied to the thermal decomposition furnace (220) is formed at an upper side off the center, but the conduit is reduced (condensed) to increase the supply velocity of the expanded superheated air, and the conduit (247) is installed by dividing it into four points perpendicular to the outer diameter of the thermal decomposition furnace (220) so that the expanded superheated steam can form a cyclone inside the thermal decomposition furnace (220).

The superheated steam supplied to the pyrolysis furnace (220) of the pyrolysis device (200) having such a configuration is supplied in a state where the moisture present in the steam is completely vaporized and exceeds the saturation temperature, and the transfer speed increases with temperature at the same pressure and has excellent heating capacity with a constant pressure specific heat of about twice that of heated air, and the enthalpy is very high compared to the latent heat, so it not only possesses high energy, but also has good heat efficiency because a composite heat transfer action occurs in which convection, radiation, and condensation heat are transferred, and by performing pyrolysis in a low-oxygen state (reducing atmosphere; only a few ppm of oxygen exists), oxidation and combustion of the heated material can be suppressed (oxygen deficiency, one of the three elements of combustion), ensuring safety with extremely low risk of fire and explosion.

In this way, the pyrolysis device (200) of the present invention has the advantage of combining the fluid dynamics and cyclone theory of Swirl flow with the strengths of superheated steam, and has the advantage of preventing the generation of droplets by compensating for some of its shortcomings.

strength disadvantage 1) Energy saving: The energy of the evaporated superheated moisture can be easily recovered through steam condensation, and the higher the temperature of the steam, the more effective it is. 1) Sealing issues: Great care must be taken to seal the device because steam leakage may occur. 2) Reduction of hazardous emissions: Dust, hazardous compounds, solvents, or volatile substances emitted during the process are removed in the form of condensate generated when superheated steam condenses. 2) Droplet generation: When the surface temperature is below the condensation temperature (100℃, atmospheric pressure), condensation of superheated steam may occur, generating droplets. 3) Stability and quality improvement: Since oxidation or combustion reactions are impossible, there is no risk of fire or explosion and no oxidation reactions. 3) Insulation required: Adequate insulation is required to maintain the temperature above the condensation temperature. 4) Improved response speed and shortened response time 4) Condensation: There are cases where slight condensation occurs due to the temperature difference at the input. 5) Sterilization, deodorization: Sterilization, sterilization, and deodorization are possible by using the high temperature of superheated steam.

In detail, the saturated steam produced in the saturated steam supply device (241) passes through a moisture filter (242) that removes residual moisture and a pressure reducing valve (243) that increases the dryness, and is then produced as superheated steam in the superheated steam supply device (240), and then passes through a reduced conduit at the entrance of the pyrolysis furnace (220), where the supply velocity increases, and is then supplied to the inside of the pyrolysis furnace (220) and expanded. At this time, the superheated air is supplied in several layers (determined according to the processing capacity) at four points perpendicular to the outer diameter of the pyrolysis furnace (220) so that cyclone formation can occur, and at the start and end of the reaction, it also plays a role in discharging oxygen and pyrolysis gas inside the pyrolysis furnace (220) to the outside, so that pyrolysis proceeds in an oxygen-free state, thereby preventing explosions, etc., and indirectly heating the superheated steam condensation prevention unit (246) outside the pyrolysis furnace (220). Thermal decomposition is performed by a system that prevents condensation by controlling and insulating the temperature inside the thermal decomposition device (200) by a burner heating device (210) (a thermal decomposition oil that maintains a constant temperature through a double pipe of non-condensable gas and medium-temperature water generated in the thermal decomposition process).

In addition, a pressure reducing valve (243) is installed in the duct of the saturated steam supply device (241) so that dried saturated steam is supplied to the superheated steam supply device (240), thereby increasing the dryness as follows and increasing the performance of the superheated steam supply device (240), and there is a characteristic that a bypass pipe (245) is installed to directly supply dried saturated steam to the pyrolysis furnace (220) depending on the raw material.

For example, if the steam conditions generated from saturated steam are 6 barG dry saturated steam with 95% dryness, then the dryness at 1 barG on the secondary side is calculated as primary heat transfer (Hg1) = sensible heat (hf1) + latent heat (hfg1) x dryness (x) = 167 kcal/kg + (494 kcal/kg x 0.95) = 636 kcal/kg The reduced steam at 1 barG on the secondary side has a heat transfer of 636 kcal/kg, so 636 kcal/kg = 120.86 kcal/kg + (525.794 kcal/kg * x) The secondary dryness is 98%, which increases by 3%.

The above pyrolysis gas treatment device (300) is composed of a diaphragm screw conveyor (230) that transports and discharges tar separated from the pyrolysis gas discharged during the pyrolysis process of the pyrolysis furnace (220), a gas separator (310) connected to the diaphragm screw conveyor (230) that separates the tar and the pyrolysis gas discharged, a moisture separator (320) that separates moisture including tar from the pyrolysis gas, and a multi-stage wax collector (330) that separates and collects wax from the pyrolysis gas separated in the gas separator (310) and supplies it to the diaphragm screw conveyor (230) for reprocessing and recycling.

The above-mentioned pyrolysis gas treatment device (300) has a screw conveyor (230) of a different diameter installed inside the outer tube (231) so as to be capable of forward and reverse rotation, and a pyrolysis gas passage is formed in the upper space by a screw conveyor (232) of a smaller diameter than the outer tube, and the screw conveyor (230) has a structure of a different diameter, and when discharging, it rotates forward, and when re-introducing the tar and wax that have not been removed from the water separator (320) and the multi-stage wax collector (330) for reprocessing, it rotates in reverse so that the pyrolysis reaction continues as a contact decomposition at 350°C to 450°C while being mixed with the existing reactants in the pyrolysis furnace (220), thereby discharging the pyrolysis gas.

Here, when reinjected, the pyrolysis gas is discharged to the upper space (233) inside the screw conveyor (230), so it not only does not affect the flow, but also has the function of cleaning tar, etc. existing inside, thereby shortening the pyrolysis time.

In this way, the water separator (320) and the multi-stage wax collector (330) connected to the screw conveyor (230) are installed with a recirculation pipe (340) connected to enable re-injection.

In addition, the pyrolysis gas pipe (350) connecting the screw conveyor (230), the water separator (320), the gas separator (310), and the multi-stage wax collector (330) from the pyrolysis gas treatment device (300) to the condenser (400) is configured with a medium-temperature water double pipe to prevent liquefaction within the pipe before the pyrolysis gas is supplied to the condenser (400), thereby preventing the pyrolysis gas pipe (350) from being clogged.

The condenser (400) is composed of a multi-stage condenser (410), a drain tank (420), a cooling tower (430), a cooling water storage tank (440), and a collection and separation tank (450) that collects condensed oil components and separates moisture. The pyrolysis gas from which wax is collected from the multi-stage wax collector (330) undergoes a condensation process using cooling water and is condensed into oil, stored in the drain tank (420), collected in the collection and separation tank (450), and stored in the oil storage tank (600) after passing through a filter.

In this way, the oil stored in the oil storage tank (600) is sent to the burner heating device (210) of the overheated steam condensation prevention unit (246) through the service oil tank (470) and used as fuel for the burner, and the wastewater separated in the collection and separation tank (450) is sent to the secondary combustion chamber (711) of the high-temperature cyclone combustor (710) of the heating furnace exhaust gas treatment device (700) through the supply pipe and is sprayed and re-burned in the low NOx process.

In addition, the non-condensed gas that is not condensed in the condenser (400) is purified in the non-condensed gas purification and backfire prevention device (500) and then sent to the burner heating device (210) of the superheated steam condensation prevention unit (246) to be used as a heating source for the burner, and the surplus non-condensed gas is supplied to and used in the primary combustion chamber (712) of the high-temperature cyclone combustor (710) that performs high-temperature combustion treatment of the exhaust gas treatment device (700).

The exhaust gas treatment device (700) is a high-temperature cyclone combustor (710) having a primary combustion chamber (712) and a secondary combustion chamber (711) and a combustion air blower (701) that supplies combustion air through an indoor odor suction pipe while combusting exhaust gas discharged from a burner heating device (210) of an overheated steam condensation prevention unit (246) installed outside a pyrolysis furnace (220) with residues such as char and surplus non-condensed gas as primary fuel and spraying moisture and waste water at a high temperature (850°C to 1200°C) to perform low NOx secondary combustion while simultaneously sucking in and removing other pollutants such as indoor odors, and gas exhausted from the high-temperature cyclone combustor has its temperature rapidly lowered (200°C to 250°C) in the primary passage, and ash descends in the middle and then passes through the secondary passage. It consists of a high-temperature exhaust gas treatment device (720) that dries moisture to produce medium-temperature water, an induced blower (721) that maintains a constant wind pressure in front of the high-temperature exhaust gas treatment device (720), a wet treatment device (722) that removes residual acid gas contained in gas discharged at low temperature from the high-temperature exhaust gas treatment device (720), and a low-temperature exhaust gas treatment device (730) that is equipped with a white smoke reduction device (723) that removes moisture contained in the discharged gas.

In addition, the outdoor deodorizing device (900) includes an outdoor deodorizing device (900) that captures odors generated in an outdoor area, sucks them in with a blower through an outdoor odor suction pipe (800), and removes them through a deodorizing process.

The operation process of the present invention will be described in more detail.

The raw material input and transfer device (103) is installed in the upper space (233) of the pyrolysis furnace (220) and is connected to the inlet (101), the storage (102), and the movable hydraulic multi-stage raw material input device (104). The raw material is supplied as compressed (Bale) from the inlet (101) and stored in the storage (102). After opening the inlet of the pyrolysis furnace (200) by the first-in, first-out method, the raw material is continuously supplied in an amount appropriate for the capacity of the pyrolysis furnace (200) to the connected movable hydraulic multi-stage raw material input device (104) and safely fed into the pyrolysis furnace (200). The burner heating device (210) of the superheated steam supply device (240) and the superheated steam condensation prevention device (246) installed outside the pyrolysis furnace (220) are operated.

In addition, a combustion air blower (701) for supplying combustion air through a high-temperature cyclone combustor (710) of an exhaust gas treatment device (700) and an indoor odor suction pipe of a high-temperature exhaust gas treatment device (720), a first combustion chamber (712) for combusting surplus non-condensable gas and carbonized materials of a pyrolysis furnace (220), a second combustion chamber (711) including a connection to an exhaust gas pipe of a heating device (210), a spraying of waste water, and a pyrolysis oil burner for maintaining an outlet temperature (850°C or higher), a high-temperature exhaust gas treatment device (720) for instantaneous cooling and reprocessing of high-temperature exhaust gas and a moisture drying function and producing medium-temperature water, and an induced blower (721) for VVVF control with a ventilation controller having a ventilation balance function are operated.

Here, the low-temperature exhaust gas treatment device (730) removes residual acid gas using a wet treatment device (722) that includes spray water containing an alkaline agent (e.g., NaOH).

When the outlet temperature of the high-temperature cyclone combustor (710) of the exhaust gas treatment device (700) becomes 850℃ or higher and the oil burner of the burner heating device (210), the service oil tank (470) and the supply pipeline equipment are completed, the differential screw conveyor (230) of the pyrolysis device (200) starts to rotate in the forward direction, and the oil burner of the burner heating device (210) of the overheated steam condensation prevention device (246) is ignited to maintain the temperature of the overheated steam condensation prevention device (246) constant while controlling the amount of overheated steam supplied by the internal temperature controller of the pyrolysis furnace (220) (same as the temperature of the pyrolysis gas inlet line of the gas separator (310), and if there is a difference, the inside of the differential screw conveyor (230) should be checked) to increase the temperature, and when it reaches 120℃, the tar recirculation of the water separator (320) is stopped for about 30 minutes. After the temperature is raised and the multi-stage wax collector (330) and wax recirculation are performed, the pyrolysis gas from which the wax has been removed is supplied to the condenser (400) through the pyrolysis gas pipe (350) made of a double tube by medium temperature water.

Dual slide gate valves are installed in the tar recirculation of the water separator (320) and the wax recirculation pipe of the multi-stage wax collector to sequentially open and lock, and the screw conveyor (232) inside the differential screw conveyor (230) is driven in reverse rotation to reversely introduce gas from the outside to the inside of the pyrolysis furnace (220). At this time, the pyrolysis gas is discharged to the upper space (233) inside the differential screw conveyor (230), so that the flow is not affected, and it also has the function of cleaning the residue existing in the differential screw conveyor (230), and it also plays a role in shortening the pyrolysis time by mixing with the reactants inside the pyrolysis furnace (220) so that contact heat transfer proceeds quickly.

Meanwhile, when the cooling tower (430), the cooling water storage tank (440), and the outdoor deodorizing device (900) including the deodorizing tower and the outdoor odor suction pipe (800) are operated, cooling water is supplied to prevent the temperature of the multi-stage wax collector (330) from rising above 250 degrees (if it rises above 250 degrees, the wax vaporizes and passes to the pyrolysis gas pipe (350)), the pyrolysis gas is condensed into oil in the condensing device (400) and supplied to the sales and service oil tank (470) and the supply pipeline facility as a means for storing and transporting pyrolysis oil, and the non-condensed gas purified through the non-condensed gas purification and backfire prevention device (500) is supplied to the burner of the heating device (210) and combusted, and also, the surplus non-condensed gas is combusted in the primary combustion chamber (712) of the high-temperature cyclone combustor (710) and collected and separated in the pyrolysis oil collection and separation tank (450). The wastewater generated through the separation process is sprayed into the secondary combustion chamber (711) of the high-temperature cyclone combustor (710) through the wastewater tank and supply pipe and re-combusted in the low-NOx process.

Here, the non-condensable gas purification and flashback prevention device (500) has the function of preventing leakage due to pressure increase of the purified gas and separating the non-condensable gas supplied to the burner of the burner heating device (210) and the surplus non-condensable gas.

The present examples and the drawings attached to the present specification are merely intended to clearly illustrate a portion of the technical idea included in the present invention, and it will be obvious that various modified examples and specific embodiments that can be easily inferred by a person skilled in the art within the scope of the technical idea included in the specification and drawings of the present invention are all included in the scope of the rights of the present invention.

100: Raw material input device 101: Inlet 102: Storage 103: Input and transfer device
104: Mobile hydraulic multi-stage raw material feeder 200: Pyrolysis device 210: Burner heating device 220: Pyrolysis furnace 230: Differential screw conveyor 231: Outer cylinder 232: Screw conveyor 233: Upper space 240: Superheated steam supply device 241: Saturated steam supply device
242: Water filter 243: Pressure reducing valve 244: Superheated steam generator 245: Bypass pipe
246: Superheated steam condensation prevention unit 247: Pipe 300: Pyrolysis gas treatment device 310: Gas separator 320: Water separator 330: Multi-stage wax collector 340: Recirculation pipe 350: Pyrolysis gas pipe 00: Condensing device 410: Multi-stage condenser 420: Drain tank 430: Cooling tower 440: Cooling water storage tank 450: Collection and separation tank 470: Service oil tank
500: Non-condensable gas purification and flashback prevention device 600: Oil storage tank 700: Heating furnace exhaust gas treatment device 701: Combustion air blower 710: High-temperature cyclone combustor 711: Secondary combustion chamber 712: Primary combustion chamber 720: High-temperature exhaust gas treatment device 721: Induced blower 722: Wet treatment device 723: White smoke reduction device 730: Low-temperature exhaust gas treatment device 800: Outdoor odor suction pipe 900: Outdoor deodorization device

Claims (4)

In a regenerative resource recovery device consisting of a raw material input device, a pyrolysis device, a pyrolysis gas treatment device, a condensation device, a non-condensed gas purification and backfire prevention device, an oil storage tank, an exhaust gas treatment device, and an outdoor deodorization device,
The above raw material input device is composed of a raw material inlet and storage for compressed raw materials made of waste vinyl and waste fishing nets that have undergone a preprocessing process, a mobile hydraulic multi-stage raw material input device, and a raw material input and transfer device.
The above pyrolysis device is composed of a pyrolysis furnace that supplies superheated steam to waste raw materials supplied through an inlet from the above raw material input/transport device to perform pyrolysis, and a superheated steam supply device that supplies superheated steam to the pyrolysis furnace.
The above pyrolysis gas treatment device includes a differential screw conveyor for transporting and discharging tar separated from the pyrolysis gas discharged during the pyrolysis process to the outside, a gas separator connected to the differential screw conveyor for separating the pyrolysis gas discharged together with the tar, a moisture separator for separating moisture including tar from the pyrolysis gas, a multi-stage wax collector for separating and collecting wax from the pyrolysis gas from which the tar and moisture have been separated, and a re-injection device configured to re-inject the separated and collected tar and wax into the pyrolysis device for reprocessing, and the pyrolysis gas pipe to the condenser is configured to be installed as a double pipe using medium-temperature water to prevent condensation in the pipe.
The above condensing device is composed of a multi-stage condenser, a drain tank, a cooling tower, a cooling water storage tank, and a collection and separation tank that collects condensed oil components to separate moisture, and the pyrolysis gas in which wax is collected from the multi-stage wax collector is condensed into oil through a condensation process using cooling water and stored in a drain tank, then collected in a collection and separation tank and stored in an oil storage tank after passing through a filter. It is a low-temperature pyrolysis regeneration resource recovery device using saturated steam and superheated steam. In the first paragraph, the superheated steam supply device of the pyrolysis device is characterized by comprising a saturated steam supply device that supplies saturated steam, a moisture filter that filters the saturated steam, a pressure reducing valve that reduces the pressure of the saturated steam to increase the dryness, a superheated steam generator that generates superheated steam and supplies it to the pyrolysis furnace through a pipe, and a bypass pipe that supplies the saturated steam directly to the pyrolysis furnace without passing through the superheated steam generator depending on the raw material of the waste. In the first paragraph, the pyrolysis furnace is configured with a superheated steam condensation prevention section made of a blocking space that reduces temperature loss to the outside and insulates the external supply pipe to prevent condensation of the superheated steam supplied thereto, and a burner heating device that maintains a constant temperature by indirect heat is installed in the superheated steam condensation prevention section, and the burner heats the non-condensed gas generated in the pyrolysis process and the pyrolysis oil that is maintained at a constant temperature by a double pipe of medium temperature water as initial fuel and, when the heating conditions are established, heats it as a non-condensed gas. A low-temperature pyrolysis regeneration resource recovery device using saturated steam and superheated steam, characterized in that in the first paragraph, the inlet of the pipe through which superheated steam is supplied to the pyrolysis furnace is formed at an upper side off the center, but the pipe is reduced (condensed) to increase the supply velocity of the expanded superheated air, and the pipe is divided into four points perpendicular to the outer diameter of the pyrolysis furnace so that the expanded superheated steam inside the pyrolysis furnace can form a cyclone.