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KR-20260064781-A - Reforming System

KR20260064781AKR 20260064781 AKR20260064781 AKR 20260064781AKR-20260064781-A

Abstract

A reforming system according to one embodiment of the present invention comprises: a first housing; a preheater disposed within the first housing and heating ammonia; a first reforming reactor that reforms ammonia passing through the preheater into hydrogen and nitrogen; a combustion heater disposed within the first housing and heating the preheater and the first reforming reactor; a second reforming reactor that reforms ammonia passing through the first reforming reactor into hydrogen and nitrogen; and an electric heating unit that heats the second reforming reactor.

Inventors

  • 안대환
  • 김희경

Assignees

  • 에이치디한국조선해양 주식회사

Dates

Publication Date
20260508
Application Date
20241029

Claims (10)

  1. First housing; and A preheater disposed within the first housing and heating ammonia; A first reforming reactor that reforms ammonia passed through the above preheater into hydrogen and nitrogen; A combustion heater disposed within the first housing to heat the preheater and the first reforming reactor; A second reforming reactor that reforms ammonia passed through the first reforming reactor into hydrogen and nitrogen; and A reforming system comprising an electric heating unit for heating the second reforming reactor.
  2. In paragraph 1, The above electric heating unit includes a plurality of electric heaters, and The above plurality of electric heaters are arranged from the front to the rear of the second reforming reactor in a reforming system.
  3. In paragraph 2, The above plurality of electric heaters are each independently controlled reforming systems.
  4. In paragraph 1, It includes a waste heat recovery unit that heats ammonia flowing into the first housing, and A reforming system in which exhaust gas generated from the combustion heater is introduced into the waste heat recovery unit.
  5. In paragraph 1, The above combustion heater is a reforming system that burns ammonia and a portion of the hydrogen reformed in the above second reforming reactor.
  6. In paragraph 1, A reforming system in which ruthenium, nickel, or cobalt is used as a catalyst in the first reforming reactor and the second reforming reactor.
  7. In paragraph 1, A reforming system further comprising a post-treatment device for processing combustion gas generated in the combustion heater above.
  8. In paragraph 1, A first line supplying ammonia from a storage tank to the preheater; It includes a first branch line branched from the first line above, and The above combustion heater is a reforming system that receives ammonia through the above first branch line.
  9. A step of comparing the measured log-average temperature difference calculated in the first modification section with a preset target log-average temperature difference; A step of adjusting the amount of fuel in a combustion heater placed in the first reforming section so that the measured log-average temperature difference approaches the target log-average temperature difference; and A method for controlling a reforming system comprising the step of adjusting the current of an electric heating unit placed in the second reforming unit based on the outlet temperature of the second reforming unit that reforms the reaction gas passing through the first reforming unit.
  10. In Paragraph 9, A reforming system in which the control of the above fuel amount and the above current are controlled through feedback control.

Description

Reforming System The present invention relates to a reforming system for producing hydrogen supplied to demand centers. Ammonia is attracting attention as a useful substance for storing and transporting hydrogen. In particular, ammonia does not emit greenhouse gases during the hydrogen production process and can be stored and transported relatively stably, making it highly promising as a raw material for clean fuels. Due to these characteristics of ammonia, research and development are actively underway regarding systems that use ammonia as fuel and reforming systems that extract hydrogen from ammonia. Conventional ammonia reforming systems primarily utilize heat to reform ammonia. This method supplies the heat required for the reforming reaction through a combustion heater, thereby decomposing ammonia into hydrogen and nitrogen. However, reforming methods relying solely on combustion heaters make precise control of the reforming reaction difficult and may face limitations in efficiently adjusting the reforming rate, particularly in situations where hydrogen demand is variable. Furthermore, in existing systems, it is difficult to precisely control the temperature of the reaction gas using only combustion heaters, making it difficult to maintain a constant hydrogen production efficiency. To improve the reaction efficiency of ammonia reforming, additional heating means are required in addition to combustion heaters; this must enable more precise temperature control and reaction control during the reforming process. Figure 1 illustrates the structure of a modification system according to an embodiment of the present invention. Figure 2 illustrates the structure of a modification system according to another embodiment of the present invention. FIG. 3 is a flowchart illustrating a control method for an individual room system according to an embodiment of the present invention. 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. Terms such as "first," "second," etc., may be used to describe various components, but the order, size, location, or importance of these components is not limited by terms such as "first," "second," etc., and they are named solely for the purpose of distinguishing one component from another. Regarding direction, the term "forward" may refer to the direction in which fluid enters a certain configuration, and the term "rear" may refer to the direction in which fluid exits a certain configuration. Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the attached drawings. FIG. 1 illu