Search

JP-7856762-B2 - Batch-type combined temperature processing machine using high-temperature plasma and exhaust gas treatment method thereof

JP7856762B2JP 7856762 B2JP7856762 B2JP 7856762B2JP-7856762-B2

Inventors

  • イ、ビョン ホ
  • ジョン、ヨン ホ
  • ファン、リ ホ
  • ヒョン、ソン ユン
  • パク、サン フン
  • チョ、ヨン ファ
  • クァク、ミン ホ
  • パク、ヘ ギュン
  • イム、ギョン ワン
  • キム、ギョン ナム

Assignees

  • ビッツロ ネクステック カンパニー リミテッド

Dates

Publication Date
20260511
Application Date
20201211
Priority Date
20201030

Claims (7)

  1. It is equipped to contain organic matter for carbonization inside, A reactor formed in a circular or U-shape, with organic matter accumulating from the bottom, The reaction section includes a reaction inlet and outlet provided to form a passage through which organic matter can be introduced into the reactor , The reaction section is equipped to stir the inside of the reaction section , In order to minimize the amount of heavy metal components released from inside the reactor, a rotating part is provided that rotates in the same direction as the direction in which organic matter is introduced from the reaction inlet and outlet and the direction of the plasma flame , It includes a torch section that is provided to generate plasma to carbonize organic matter inside the reaction section, The torch portion is connected to the reaction section and is arranged to be connected to the opposite side of the position where organic matter accumulates and is stirred inside the reaction section . If the region of the reactor is defined as the first quadrant, second quadrant, third quadrant, and fourth quadrant in a counterclockwise direction from the upper right side with respect to the horizontal and vertical axes from the center of the reactor, then the reaction inlet and outlet and the torch section are formed to be located in the first or second quadrant region, so that the amount of carbonization at low, medium, and high temperatures can be adjusted by adjusting the stirring speed of the rotating section, and the amount of gasification is kept to the minimum necessary for carbonization. The torch section is connected perpendicularly to the tangential direction of the inner wall of the reactor and has a discharge direction that is at an angle of 0 degrees or more inward from the tangential direction of the outer wall of the reactor, so that organic matter absorbs the heat generated from the torch section and harmful components including nickel and chromium are not discharged to the outer wall of the reactor due to thermal effects. A batch-type combined temperature processing machine using high-temperature plasma, characterized by the following features.
  2. The aforementioned rotating part A rotating shaft formed at the center of the reaction section, Includes a plurality of rotors coupled to the aforementioned rotating shaft. A batch-type combined temperature processing machine using high-temperature plasma as described in claim 1 .
  3. The torch section is, It is provided to be coupled to the upper part of the reactor, The system is coupled to have a position and angle that discharges plasma in a direction corresponding to the direction of organic matter introduced from the reaction inlet/outlet. A batch-type combined temperature processing machine using high-temperature plasma as described in claim 1 .
  4. A first heat exchange unit is provided to exchange heat between the exhaust gas discharged from the reaction unit and the outside air to condense the moisture in the exhaust gas, A scrubber section is connected to the first heat exchange section and is provided to collect fine particles of the exhaust gas that has undergone heat exchange, A mixing unit is connected to the scrubber section and is provided to mix oxygen with the exhaust gas from which fine particles have been collected, A heater unit that controls the temperature of the exhaust gas mixed with oxygen, A purification unit is provided to cause a catalytic reaction with pollutants in the exhaust gas whose temperature is controlled by the heater unit, A second heat exchange unit is connected to the purification unit and is provided to condense the moisture in the exhaust gas by heat exchange between the exhaust gas and the outside air, The batch-type combined temperature processing machine using high-temperature plasma according to claim 1, further comprising an exhaust section for discharging the exhaust gas, which is provided downstream of the second heat exchange section.
  5. The aforementioned purification unit The CO in the exhaust gas is combined with the additionally supplied O2 by an oxidation catalyst to form CO2 . It is equipped to convert NOx into N2 and H2O using a reducing agent and a reducing catalyst. A batch-type combined temperature processing machine using high-temperature plasma as described in claim 4 .
  6. In the exhaust gas treatment method for a batch-type combined temperature processing machine using high-temperature plasma as described in claim 4 , a) A step in which exhaust gas is discharged from the reaction section, b) The first heat exchange unit performs a step of condensing moisture by exchanging heat with the outside air over the discharged exhaust gas, c) The scrubber section collects fine particles of the exhaust gas that have condensed moisture, d) The mixing unit performs the step of mixing outside air with the exhaust gas from which the fine particles have been collected, e) The heater unit controls the temperature of the exhaust gas mixed with outside air, f) The purification unit causes a catalytic reaction with respect to pollutants in the exhaust gas at a controlled temperature, g) The second heat exchange unit performs a step of condensing moisture by exchanging heat between the exhaust gas that has undergone a catalytic reaction and the outside air, h) A method for treating exhaust gas from a batch-type combined temperature processing machine using high-temperature plasma, characterized in that the exhaust section discharges the exhaust gas from which moisture has been condensed.
  7. In step f) above, The aforementioned purification unit If the temperature downstream of the oxidation catalyst for CO treatment is above a predetermined temperature, the system determines that the carbonization is complete with a moisture content of less than 1% in the reactor, and is equipped to stop the operation of the torch section. A method for treating exhaust gas from a batch-type combined temperature processing machine using high-temperature plasma as described in claim 6 .

Description

This invention relates to a batch-type combined temperature processing machine using high-temperature plasma and a method for treating its exhaust gas, and more specifically, to a batch-type processing machine for organic materials that is easy to maintain and economical, and a method for treating its exhaust gas. As cities develop and housing density increases, organic matter consisting of food waste from individual households has become concentrated. However, due to the NIMBY (Not In My Home) phenomenon, many large-scale organic waste processing plants are located on the outskirts of residential areas. Therefore, organic waste is collected in densely populated areas and then transported to these processing plants. This practice, however, has led to new complaints regarding the storage, transportation, and final processing of such organic waste, including foul odors and the emergence of harmful insects. Consequently, there is a growing recognition that food waste must be disposed of by the person who generates it. Therefore, based on this understanding, there is a great deal of activity in developing technologies for processing organic materials at their source. The organic waste treatment technology developed for household use involves crushing the organic waste with a crusher and flushing it down the drain with water. While this method simplifies the disposal of organic waste at home, it places a very large pollution burden on sewage treatment plants, causing numerous problems for their operation. Furthermore, while organic waste elimination devices that use microorganisms for aerobic decomposition have the advantage of being environmentally friendly, they require a long time for the microorganisms to completely decompose the organic matter, resulting in an economic burden of continuous supply of microbial starter cultures. Additionally, some anaerobic microorganisms produce malodorous substances such as hydrogen sulfide and mercaptans during decomposition, and installing organic waste elimination devices in every home would expand numerous points of pollution. On the other hand, to solve the aforementioned problems, there is a technique in which the liquid produced by compressing and dewatering organic matter is discarded into the sewer, and the solid matter is dried or carbonized with an electric heater or fossil fuel burner. However, this technique is cumbersome to use because the plastic bag containing the organic matter must be torn open and only the organic matter processed. Furthermore, since drying or carbonization is performed at temperatures below 600°C using an electric heater, the processing time is long, and there is a problem in that the malodorous substances generated during carbonization cannot be decomposed at high temperatures, resulting in the generation of a large amount of foul odor. Therefore, recently, methods using high-temperature plasma to carbonize organic materials have been employed, and this is sometimes used to treat recalcitrant organic materials. Furthermore, by treating organic materials and then gasifying and decomposing them, the resulting gas can sometimes be reused. The carbonization of organic materials is generally carried out in an oxygen-free reactor. The typical temperatures used are 200-400°C for low-temperature carbonization, 400-600°C for medium-temperature carbonization, and 600°C or higher for high-temperature carbonization. The method of supplying the heat source differs depending on the required temperature range. Indirect heating methods using heat transfer oil are mainly used for low-temperature carbonization, while hot air methods are mainly used for medium-temperature carbonization. For high-temperature carbonization, indirect heating methods are sometimes used because direct flame supply would require oxygen. However, when designing the equipment, steam or other heat sources may be used for efficiency, and heat generated by the oxidation of the carbon components of the material being carbonized may also be utilized. In the method of carbonizing or gasifying organic materials to be processed using high-temperature plasma as a heat source, instead of creating a vacuum, a method is used in which N2 is supplied to induce a dilute oxygen environment in order to induce thermal decomposition in an oxygen-free atmosphere. Furthermore, when using plasma to generate a flame and supply heat to the reactor as a heat source, a common method involves heating the entire reactor atmosphere to the desired temperature. However, because energy is consumed for preheating, postheating, and cooling due to the ambient temperature, plasma-based methods generally have the problem of high processing costs. Furthermore, conventionally, since the plasma torch was installed at the bottom of the reactor, moisture from organic matter could flow into the torch, interrupting its operation. This presented problems such as the need to remove all organic matter from inside the reactor