KR20130062214A - How to change the flue gas flow path for improving the life and environment of the circulating fluidized bed boiler for solid fuel (RDF, RPF) combustion - Google Patents

How to change the flue gas flow path for improving the life and environment of the circulating fluidized bed boiler for solid fuel (RDF, RPF) combustion Download PDF

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KR20130062214A
KR20130062214A KR1020110128902A KR20110128902A KR20130062214A KR 20130062214 A KR20130062214 A KR 20130062214A KR 1020110128902 A KR1020110128902 A KR 1020110128902A KR 20110128902 A KR20110128902 A KR 20110128902A KR 20130062214 A KR20130062214 A KR 20130062214A
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South Korea
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combustion
flow path
boiler
fluidized bed
rdf
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KR1020110128902A
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Korean (ko)
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유지원
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유지원
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/18—Details; Accessories
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
    • F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
    • F22D1/02—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G1/00—Steam superheating characterised by heating method
    • F22G1/02—Steam superheating characterised by heating method with heat supply by hot flue gases from the furnace of the steam boiler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/02—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
    • F23C10/04—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
    • F23C10/08—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)

Abstract

PURPOSE: A method for changing a flow path of an exhaust combusting gas, capable of improving the environment and extending the lifetime of a circulating fluidized bed boiler for combusting solid fuel(RDF,RPF) is provided to prevent from shortening the lifetime of a louver due to a toxic gas by improving the thermal balance and adding a secondary dust collector. CONSTITUTION: A method for changing a flow path of an exhaust combusting gas comprises; a step of passing high temperature combusting gas combusted in a furnace(1) through a first cyclone(2) and a second cyclone(5); a step of delivering the heat to a boiler louver while the combusting gas passes through a super heater(7); and a step of discharging the combusting gas by passing through a coal economizer(8) and an air heater(9).

Description

고형 연료(RDF,RPF) 연소용 순환 유동층 보일러의 수명과 환경 개선을 위한 배출 연소가스 유로 변경 방법{omitted}Method for changing the exhaust flue gas flow path for improving the life and environment of the circulating fluidized bed boiler for solid fuel (RDF, RPF) combustion

도1 : 본 발명에 의한 순환 유동층 연소로 및 보일러 전체 구조도1: Overall structure diagram of a circulating fluidized bed combustion furnace and boiler according to the present invention

도2 : 본 발명에 의한 유로 변경 보일러의 상부 구조도Figure 2: upper structure diagram of the flow path change boiler according to the present invention

도3 : 본 발명에 의한 유로변경 하부 구조도Figure 3 is a structural diagram of the lower flow channel change according to the present invention

도4 : 본 발명에 의한 2차 사이클론 연도 및 보일러 통과 연돌 상세도4: Detail of secondary cyclone flue and boiler passing stack according to the present invention

도5 : 기존의 연소가스 흐름도Figure 5: Existing Combustion Gas Flowchart

도6 : 본 발명에 의한 연소가스 흐름도6 is a flow chart of the combustion gas according to the present invention

* 도면의 주요부분에 대한 부호의 설명DESCRIPTION OF THE REFERENCE NUMERALS

1. 연소로 2. 1차 싸이크론 1. combustion furnace 2. primary cyclone

3. 1차 연도 4. 2차 싸이크론 입구 유로 3. First year 4. Second cyclone inlet flow path

5. 2차 싸이크론 6. 보일러 통과 유로 5. Secondary cyclone 6. Boiler passage

7. 슈퍼히터 8. 절탄기 7. Super heater 8. Crusher

9. 에어히터 10. 연돌 가스 배출 구 9. Air heater 10. Flue gas outlet

11. 1차 싸이크론 입구 연도 12. 유로 칸막이11. Year of the first cyclone inlet 12. Euro divider

13. 2차 먼지 배출 장치13. Secondary Dust Discharge Device

본 발명은 폐기물인 슬러지와 폐 플라스틱을 혼합하고 고형화 하여 제조한 고체연료(RPF 또는 RDF)를 순환 유동층 열병합 보일러에 연소하여 에너지를 회수하고 폐기물을 안전하게 처리할 수 있는 알디에프 및 알피에프 연소용 모래 순환 유동층 보일러의 연료가스의 효율성 증가 및 설비 내구성 증가를 위한 연소가스 유로 변경 장치의 구성과 방법에 대한 것이다.In the present invention, the solid fuel (RPF or RDF) produced by mixing and solidifying waste sludge and waste plastic is burned in a circulating fluidized bed cogeneration boiler to recover energy and to safely treat waste. The configuration and method of a flue gas flow path changing device for increasing efficiency of fuel gas and increasing durability of a circulating fluidized bed boiler.

기존의 고형연료용 순환 유동층 보일러는 연소로에서 연소한 가스가 1차 사이클론을 통하여 비교적 온도가 불균일한 상태로 상부에서 직접 슈퍼히터를 통하고 절탄기와 에어히터를 통하여 배기되는 구조로 이는 온도가 불균일한 상태 즉 온도 편차 및 유해성분이 비교적 많은 상태의 연소가스가 본 순환 유동층 보일러의 핵심부품인 슈퍼히터에 직접 작용을 함으로서 열교환 장치인 슈퍼히터 튜버를 손상시키는 원인이 되어 보일러의 수명이나, 열전달의 효용 면에서도 매우 불리한 문재점을 안고 있었다.Conventional solid fuel circulating fluidized bed boilers have a structure in which the gas burned in the combustion furnace is discharged through the superheater directly from the top through the first cyclone and through the coal cutter and the air heater. Combustion gas in one state, that is, temperature fluctuations and relatively high toxic components, acts directly on the super heater, which is a key part of the circulating fluidized bed boiler, causing damage to the superheater tube, which is a heat exchanger. It also had a very disadvantageous door.

따라서 불 안정한 연소가스가 직접 슈퍼히터에 직접 닿지 않도록 하면서 유해가스가 저감된 상태에서 고온 열 교환이 이루어지도록 하는 노력이 보일러 제조업체를 중심으로 활발한 노력을 하고 있으나, 연소열과 유해가스에 의한 튜버의 손상 및 수명 저하의 문제는, 지속적으로 발생하고 있었다.Therefore, efforts have been actively made by boiler manufacturers to prevent unstable combustion gas from directly contacting the super heater and to achieve high temperature heat exchange in a state where harmful gases are reduced, but damage to the tube due to combustion heat and harmful gases And the problem of deterioration of life has been continuously occurring.

따라서 본 발명에서는 상기 도출된 문제를 해결하기 위하여 기존의 순환 유 동층 보일러의 구조를 크게 변형시키지 않으면서, 효과가 매우 큰 특징을 가지는, 유로 변경을 실시하는 창출한 결과 보다 균일한 유온을 유지하면서 유해 물질을 제거한 고열의 유체를 얻음으로서 직접 열에 의한 열 교환 튜버의 표면 손상을 방지하고, 유해 가스 접촉에 의한 수명저하를 방지할 수 있는 장점을 가지는 방법으로서 유로 내부의 열의 균일화와 유해가스 제거는 기술적으로 매우 중요한 과제이다.Therefore, in the present invention, to solve the above-mentioned problems, without significantly modifying the structure of the existing circulating fluidized bed boiler, the effect is very large, while creating a flow path change, while maintaining a more uniform oil temperature By obtaining a high-temperature fluid from which harmful substances are removed, it is possible to prevent surface damage of the heat exchanger tube by direct heat and to reduce the lifespan caused by contact with harmful gases. This is a very technically important task.

본 발명에서는 상기의 목적을 달성하기 위하여 기존의 연소로에서 발생한 가스가 1차 싸이클론을 통과하고, 이후 보일러의 튜버에 직접적으로 접촉하여 열교환이 이루어지는 방법을 개선하여 기존의 1차 싸이클론과는 별개로 보일러 하부 경사부에 2차 싸이클론 집진 설비를 구성하고 1차 싸이클론을 통과한 유체가스를 보일러 본체 내 여분의 공간에 별도의 칸막이를 만들고 칸막이를 통하여 연소가스가 통과하도록 함으로서 1차 싸이클론을 통과한 고온의 유체가 2차 싸이클론으로 통과한 연소 가스가 수퍼 히터에 접촉하도록 장치되어 있다. 따라서 불균일한 온도나, 유해가스가 포함된 연소가스가 온도가 보다 균일하고, 유해가스가 저감된 상태로 슈퍼히터에 접촉하도록 하여, 보일러 설비에서의 강장 핵심부인 수퍼히터의 손상과 수명을 개선할 수 있는 연소가스 이동 라인을 제공함으로서 보일러의 수명을 연장하는 효과를 가지는 특징이 있는 발명이다.In the present invention, in order to achieve the above object, the gas generated in the existing combustion furnace passes through the primary cyclone, and then directly contacts the tubing of the boiler to improve the method of heat exchange, thereby improving the existing primary cyclone. Separately, a secondary cyclone dust collector is formed at the lower slope of the boiler, and the fluid gas passing through the primary cyclone is made into a separate partition in the extra space in the boiler body, and the combustion gas passes through the partition. The hot gas that has passed through the clones is arranged so that the combustion gas that has passed through the secondary cyclones contacts the super heater. Therefore, it is possible to improve the damage and lifetime of the super heater, which is the core part of the boiler, by making the non-uniform temperature or the combustion gas containing harmful gas contact the super heater with the temperature more uniform and the harmful gas reduced. The invention is characterized by having the effect of extending the life of the boiler by providing a combustion gas moving line.

이하 유첨된 도면에 의하여 본 발명의 실시 예를 설명하기로 한다. 이는 바람직한 실시 예로서 본 발명을 제한하거나, 국한하는 것은 아니다. 도1 : 본 발명에 의한 순환 유동층 연소로 및 보일러 전체 구조도이며, 도2는 본 발명에 의한 유 로 변경 보일러의 상부 구조도이고, 도3은 본 발명에 의한 유로변경 하부 구조도이다. 그리고 도4는 본 발명에 의한 2차 사이클론 연도 및 보일러 통과 연돌 상세도이다. 또 연소가스 흐름도로서 도5는 기존의 연소가스 흐름도이며, 도6은 본 발명에 의한 연소가스 흐름도이다. 먼저 도 1에 보이는 바와 같이 연소로(1)에서 연소된 연소가스가 도2의 상부에 있는 1차 싸이클론 연도(11)를 통과하여 1차 싸이클론(2)에서 1차로 집진을 실시하고 이후 1차 집진된 연소가스가 1차연도(3)을 통과한 후 보일러 본체에 투입된다.Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. This is not a limitation or limitation of the invention as a preferred embodiment. 1 is an overall structural diagram of a circulating fluidized bed combustion furnace and a boiler according to the present invention, FIG. 2 is an upper structural diagram of a flow path changing boiler according to the present invention, and FIG. 4 is a detailed view of secondary cyclone flue and boiler passing stack according to the present invention. 5 is a conventional combustion gas flow diagram, and FIG. 6 is a combustion gas flow diagram according to the present invention. First, as shown in FIG. 1, the combustion gas combusted in the combustion furnace 1 passes through the primary cyclone flue 11 in the upper part of FIG. The primary combustion dust is passed into the primary flue (3) and then injected into the boiler body.

상기 보일러 본체에 투입된 상기 연소 가스는 보일러 본체에 장치된 칸막이로 된 2개의 유체 통로, 즉 2차 싸이클론 입구 유로(4)와 보일러 통과 유로(6)에서 상기 2차 싸이클론 입구 유로(4)를 통하여 상기 보일러 하부에 위치한 2차 싸이클론(5)으로 투입된다. 상기 보일러 통과 유로(6)는 반드시 상기 2차 싸이클론을 통해서만 상기 2차 싸이클론 입구 유로(4)로 상기 연소가스가 통과하도록 장치되어 있으며, 벽체 내부는 일반 보일러에서 사용되는 내화 벽돌로 보호되어 있음은 주지하는 바와 같다.The combustion gas introduced into the boiler body is divided into two fluid passages, namely, secondary cyclone inlet flow passages 4 and boiler passage flow passages 6, which are partitions installed in the boiler body. Through the secondary cyclone (5) located in the lower portion of the boiler through. The boiler passage passage 6 is provided so that the combustion gas passes through the secondary cyclone inlet passage 4 only through the secondary cyclone, and the inside of the wall is protected by a refractory brick used in a general boiler. It is as noted.

이후 상기 2차 싸이클론(5)에서 한 번 더 집진된 연소 가스는 도 6과 도7의 흐름도에서와 같이 기존의 고온이 슈퍼히터, 절탄기, 에어히터 순으로 상부에서 하부로 배치되어 하부로 관통되는 것과는 반대로 도1에서 보이는 바와 같이 하부에서 순서대로 슈퍼히터(7), 절탄기(8), 에어히터(9)로 배치되어 상기 슈퍼히터(7)를 통과하고, 이후 상기 절탄기(8)을 통과하며, 이후 상기 에어히터를 통과함으로서 고온의 연소가스가 상부로 흘러가는 시스템으로 구성되면서 보다 균일한 열 전달과, 듀버 외면의 손상을 방지할 수 있는 특징을 가지는 순환 유동층 보일러 연소가스 공급 방법 및 장치를 제공한다.Then, the combustion gas collected once more in the secondary cyclone 5 is disposed from top to bottom in the order of the superheater, the coal mill, and the air heater in order of the existing high temperature as shown in the flowcharts of FIGS. 6 and 7. Contrary to being penetrated, as shown in FIG. 1, the super heater 7, the pelletizer 8, and the air heater 9 are arranged in order from the bottom to pass through the super heater 7, and then the pelletizer 8. After passing through the air heater, the circulating fluidized bed boiler flue gas supply having a characteristic of more uniform heat transfer and damage to the outer surface of the duplexer is composed of a system in which hot combustion gas flows upwards through the air heater. It provides a method and apparatus.

이상과 같이 본 발명에 의하면 저급 탄인 고형 연료(RDF, RPF)용 순환 유동층 보일러의 연소가스 유로를 변경하여, 집진 효율과 보일러 튜버의 수면을 연장시키는 목적으로 기존의 연소가스가 상부에서 하부로 흘러가는 것을 하부에서 상부로 흘러가는 유로로 창안하면서 2차 집진 장치를 추가하고 열의 균형을 보다 더 개선함으로서 유해 가스(분진)에 의한 튜버의 수명 단축을 방지하고, 열응력의 불 균일에 의한 튜버의 손상을 방지하는 연소가스 유로 변경 방법을 창안함으로서 고형연료를 이용하는 보일러의 이용을 활성화하여, 날로 증가하는 쓰레기 및 폐비닐, 폐 플라스틱을 자원화 하여 환경 정화는 물론 폐기물을 이용하여 에너지를 얻을 수 있는 순환 유동층 보일러의 수명연장과 공해 물질의 저감 등 많은 장점을 가지게 된다.As described above, according to the present invention, by changing the combustion gas flow path of the circulating fluidized bed boiler for low fuel solid fuels (RDF, RPF), the existing combustion gas flows from the top to the bottom for the purpose of extending dust collection efficiency and the surface of the boiler tube. By adding a secondary dust collector and improving the heat balance even more while creating a flow path flowing from the bottom to the top, preventing the shortening of the life of the tube due to harmful gases (dust), By devising a method to change the combustion gas flow path to prevent damage, the use of boilers using solid fuels is activated, and recycling of waste, vinyl and waste plastics, which are increasing day by day, can be used to clean up the environment as well as to obtain energy using waste. It has many advantages, such as extending the life of fluidized bed boilers and reducing pollutants.

Claims (3)

유동층 보일러 구조에 주로 폐플라스틱과 쓰레기부터 얻어진 고형연료인 알피에프(RPF) 또는 알디에프(RDF) 연소로의 유로 변경에 대한 것으로, 연소로(1)에서 연소된 고온의 연소가스가 1차 싸이클론(2)을 통과하고, 2차 싸이클론(5)을 통과하며 상기 2차 싸이클론(5)를 통과한 연소가스가 슈퍼히터(7)을 통과하면서 보일러 튜버에 열을 전달하고, 이후 상기 연소 가스는 절탄기(8)를 거쳐 에어히터(9)을 통과하여 배출되는 것을 특징으로 하는 고형 연료(RDF,RPF) 연소용 순환 유동층 보일러의 수명과 환경 개선을 위한 배출 연소가스 유로 변경 방법.The fluidized bed boiler is designed to change the flow path of the RF or RDF combustion furnace, which is a solid fuel obtained mainly from waste plastics and waste, and the high temperature combustion gas combusted in the combustion furnace 1 The combustion gas passing through the clone (2), passing through the secondary cyclone (5) and passing through the secondary cyclone (5) passes heat to the boiler tube while passing through the super heater (7), and then the Combustion gas is discharged through the air heater (9) through the coal blower (8) to change the exhaust gas flow path for improving the life and environment of the circulating fluidized bed boiler for solid fuel (RDF, RPF) combustion. 1항에 있어서 상기 1차 싸이클론(2)을 통과한 상기 연소가스가 2차 싸이클론 입구 유로(4)를 통과하는 동안, 상기 슈퍼히터(7)와 상기 절탄기(8) 및 상기 에어히터(9)를 통과하는 유로인, 보일러 통과 유로(6)와는 격벽으로 구성되어 별개의 유로 라인으로 구성됨을 특징으로 하는 고형 연료(RDF,RPF) 연소용 순환 유동층 보일러의 수명과 환경 개선을 위한 배출 연소가스 유로 변경 방법.The superheater (7), the crusher (8), and the air heater according to claim 1, while the combustion gas passing through the primary cyclone (2) passes through the secondary cyclone inlet flow passage (4). Emission for improving the life and environment of the circulating fluidized bed boiler for solid fuel (RDF, RPF) combustion, characterized in that the passage through the boiler (9), the passage through the boiler (6) consists of a partition wall and a separate flow path. How to change the flue gas flow path. 1항에 있어서 상기 슈퍼히터(7) 상부에 상기 절탄기(8)가 배치되고 상기 절탄기(8) 상부에 상기 에어히터(9)가 배치되고 상기 연소가스가 하부에서 상부로 이동하는 것을 특징으로 하는 고형 연료(RDF, RPF) 연소용 순환 유동층 보일러의 수명과 환경 개선을 위한 배출 연소가스 유로 변경 방법.According to claim 1, wherein the superheater (7) is arranged on the top of the coal mill 8, the air heater (9) is arranged on the top of the coal mill 8 and the combustion gas is moved from the bottom to the top Method for changing the flue gas flow path for improving the life and environment of the circulating fluidized bed boiler for solid fuel (RDF, RPF) combustion.
KR1020110128902A 2011-12-02 2011-12-02 How to change the flue gas flow path for improving the life and environment of the circulating fluidized bed boiler for solid fuel (RDF, RPF) combustion KR20130062214A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106838966A (en) * 2017-01-13 2017-06-13 张瀮升 A kind of energy-saving industrial boiler
KR20180000380A (en) 2016-06-22 2018-01-03 한국에너지기술연구원 Circulating fluidized bed combustion boiler for solid refused fuel with tube corrosion prevent and clinkers reduction fuction
KR20180073783A (en) 2016-12-22 2018-07-03 한국에너지기술연구원 A Circilation Fluidized Bed Boiler for Overcome Combustion Failure in a Circulating Fluidized Bed Boiler Using Solid Fuel Containing Nonflammable and Chorine Component

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180000380A (en) 2016-06-22 2018-01-03 한국에너지기술연구원 Circulating fluidized bed combustion boiler for solid refused fuel with tube corrosion prevent and clinkers reduction fuction
KR20180073783A (en) 2016-12-22 2018-07-03 한국에너지기술연구원 A Circilation Fluidized Bed Boiler for Overcome Combustion Failure in a Circulating Fluidized Bed Boiler Using Solid Fuel Containing Nonflammable and Chorine Component
CN106838966A (en) * 2017-01-13 2017-06-13 张瀮升 A kind of energy-saving industrial boiler

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