Search

KR-20260063242-A - EXHAUST GAS AFTERTREATMENT SELF-GENERATION SYSTEM

KR20260063242AKR 20260063242 AKR20260063242 AKR 20260063242AKR-20260063242-A

Abstract

An exhaust gas aftertreatment self-generating system according to one embodiment of the present invention includes a ship engine, an exhaust gas aftertreatment device that processes high-temperature exhaust gas discharged from the ship engine using microwaves, a waste heat recovery device that generates electricity by recovering waste heat from the exhaust gas using a thermoelectric semiconductor or an Organic Rankine Cycle (ORC), and a control unit that controls the electricity generated from the waste heat recovery device to be supplied to the exhaust gas aftertreatment device or stored in an Energy Storage System (ESS).

Inventors

  • 정다희
  • 김도윤
  • 고결
  • 곽진수
  • 황소영

Assignees

  • 에이치디한국조선해양 주식회사

Dates

Publication Date
20260507
Application Date
20241030

Claims (5)

  1. Ship engine; An exhaust gas aftertreatment device that processes high-temperature exhaust gas discharged from the above-mentioned ship engine using microwaves; A waste heat recovery device that generates electricity by recovering waste heat from the exhaust gas using a thermoelectric semiconductor or an Organic Rankine Cycle (ORC); and A control unit comprising a control unit that controls the supply of electricity generated from the above waste heat recovery device to the above exhaust gas aftertreatment device or to store it in an Energy Storage System (ESS). Exhaust gas aftertreatment self-generating system.
  2. In paragraph 1, The above waste heat recovery device is configured to generate electricity by utilizing the temperature difference between the waste heat of the exhaust gas and the outside air or cooling water using a thermoelectric power generation element. Exhaust gas aftertreatment self-generating system.
  3. In paragraph 1, Further including an Energy Storage System (ESS) that stores the generated electricity, Exhaust gas aftertreatment self-generating system.
  4. In paragraph 1, The above control unit is, Determining whether the above exhaust gas aftertreatment device is in operation, When the above exhaust gas aftertreatment device is not in operation, controlling the generated electricity to be stored in the ESS, Exhaust gas aftertreatment self-generating system.
  5. In paragraph 4, The above control unit is, When the exhaust gas aftertreatment device is in operation, in a state where CO2 emissions must be restricted, or when the ESS is not in a state where storage is possible, controlling the generated electricity to be supplied to the exhaust gas aftertreatment device. Exhaust gas aftertreatment self-generating system.

Description

Exhaust Gas Aftertreatment Self-Generation System The present invention relates to an exhaust gas aftertreatment self-generation system capable of self-generation. To post-treat exhaust gases from ship engines, substances contained in the exhaust gases can be subjected to oxidation or reduction reactions. Solid catalysts are used for these oxidation or reduction reactions. To activate the oxidation or reduction reaction, the catalyst needs to be heated to an appropriate temperature; while the optimal temperature range may vary depending on the type of catalyst, it is typically required to be a temperature significantly higher than room temperature. Furthermore, exhaust gas aftertreatment devices may utilize microwaves to promote catalytic reactions, but additional power may be required to generate these microwaves. Meanwhile, since exhaust gases are discharged at high temperatures, there is a need for technology that saves energy by generating electricity from the waste heat of the exhaust gases and reusing it in the exhaust gas aftertreatment device. FIG. 1 is a block diagram of an exhaust gas aftertreatment self-generation system according to one embodiment of the present disclosure. FIG. 2 shows an exhaust gas aftertreatment self-generation system to which a waste heat recovery device using a thermoelectric power generation element is applied according to one embodiment of the present disclosure. FIG. 3 shows an exhaust gas aftertreatment self-generation system to which a waste heat recovery device using a thermoelectric power generation element and cooling water is applied according to one embodiment of the present disclosure. FIG. 4 shows an exhaust gas aftertreatment self-generation system to which a waste heat recovery device using ORC is applied according to one embodiment of the present disclosure. FIG. 5 shows an exhaust gas aftertreatment self-generation system to which a waste heat recovery device using ORC and thermoelectric power generation elements is applied according to one embodiment of the present disclosure. FIGS. 6 and 7 show operation flowcharts of a control unit according to one embodiment of the present disclosure. The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the invention to specific embodiments, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. The term "and/or" includes a combination of a plurality of related described items or any of a plurality of related described items. Terms such as "~part," "~section," "~part," etc. may be used to describe various components, but said components should not be limited by said terms. These terms may refer not only to physically or visibly distinguishable components but also to descriptions of the function or configuration of a relevant part, even if the distinction or division is not clearly defined. The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to specify the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application. In the description below, terms related to direction such as "front," "rear," "side," "front," "back," "up and down," "top," "upper," "top," "bottom," "lower," "bottom," and "left and right" are defined based on the vehicle or vehicle body. Furthermore, while terms such as "first," "second," etc., may be used to describe various components, the order, size, location, or