KR20040000818A - Method of removing unburnt coal powder in flyash and apparatus of the same - Google Patents

Method of removing unburnt coal powder in flyash and apparatus of the same Download PDF

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Publication number
KR20040000818A
KR20040000818A KR1020020035780A KR20020035780A KR20040000818A KR 20040000818 A KR20040000818 A KR 20040000818A KR 1020020035780 A KR1020020035780 A KR 1020020035780A KR 20020035780 A KR20020035780 A KR 20020035780A KR 20040000818 A KR20040000818 A KR 20040000818A
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coal
fly ash
syn gas
decomposition furnace
high temperature
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KR1020020035780A
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Korean (ko)
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김현영
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김현영
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Publication of KR20040000818A publication Critical patent/KR20040000818A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/62—Carbon oxides
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/32—Direct CO2 mitigation

Abstract

PURPOSE: A method and an apparatus for removing particles of unburnt coal in fly ash are provided to recycle fly ash as an industrial resource by removing unburnt fine particles of coal remained in fly ash in a high efficiency at low cost. CONSTITUTION: The apparatus comprises a coal decomposition furnace(10) which is connected to a syn gas burner for producing syn gas of H2 and CO so that H2O and CO2 of high temperature generated from the syn gas burner are introduced in the coal decomposition furnace(10) through gas inflow port(13), and in which fly ash generated during combustion of coal is introduced through fly ash inflow port(14) so that CO and H2 are discharged to the outside of the coal decomposition furnace(10) through exhaust port(15) by reacting coal particles remained in the fly ash with the H2O and CO2 of high temperature respectively, wherein the coal particle free fly ash is collected through discharge port(16) formed on a lower part of the coal decomposition furnace(10) so that the collected coal particle free fly ash is recycled as a material for cement, and the coal decomposition furnace(10) comprises a refractory insulating wall body(11) formed of cerakwool that is a type of ceramic fiber, and a SiC coating layer(12) formed on an inner wall of the refractory insulating wall body(11).

Description

플라이애쉬에 포함된 석탄입자를 제거하는 방법 및 그 장치{ METHOD OF REMOVING UNBURNT COAL POWDER IN FLYASH AND APPARATUS OF THE SAME}Method and apparatus for removing coal particles contained in fly ash {METHOD OF REMOVING UNBURNT COAL POWDER IN FLYASH AND APPARATUS OF THE SAME}

본 발명은 석탄을 연소할 때 발생하는 플라이애쉬 속에 연소되지 않은 상태로 잔존하는 석탄입자를 제거하는 방법 및 그 장치에 관한 것이다.The present invention relates to a method and apparatus for removing coal particles remaining in an unburned state in a fly ash generated when burning coal.

화력발전소나 지역난방 보일러 등과 같이 석탄을 대량으로 연소하여 발생하는 열을 사용하는 산업에서 석탄을 대량으로 연소할 때 발생하는플라이애쉬(flyash)는 대부분 포집하여 시멘트재료나 콘크리트혼화재로서 재활용되고 있다. 그런데 상기 플라이애쉬속에는 연소되지 않은 상태로 배출되는 석탄입자가 포함되어 있으므로 플라이애쉬를 그대로 사용할 수 없어 그 속에 포함된 미연소 석탄입자를 제거하는 별도의 처리공정을 거쳐서 재활용되거나 그대로 폐기하고 있었다.In the industry that uses the heat generated by burning a large amount of coal, such as a thermal power plant or a district heating boiler, fly ash generated when burning a large amount of coal is collected and recycled as a cement material or concrete admixture. However, the fly ash contained coal particles discharged in the unburned state, so the fly ash cannot be used as it is, and was recycled or disposed of as it was through a separate treatment step of removing unburned coal particles contained therein.

따라서 현재 상기 플라이애쉬 속에 포함된 연소되지 않은 석탄입자를 제거하는 방법으로 여러가지가 알려져 있다.Therefore, various methods are currently known for removing unburned coal particles contained in the fly ash.

그 중 하나의 방법은 플라이애쉬를 다시 연소하여 남은 미세한 석탄입자를 제거하는 것인 데, 이러한 방법은 재연소에 상당한 열이 소요되어 비용이 증가하는 단점이 있으므로 널리 적용되지 못하였다.One method is to reburn the fly ash to remove the fine coal particles remaining. This method has not been widely applied because of the disadvantage that the reburn requires considerable heat and increases the cost.

다른 방법으로서는 미세한 석탄입자가 시멘트의 품질에 악영향을 미치지 않도록 첨가물을 첨가하는 방법이 있으나, 이 방법은 첨가물의 첨가에 의해 2차적으로 발생하는 반응물질로 인하여 만족스러운 대처방법으로 이용되지 못하고 있다.Another method is to add an additive so that fine coal particles do not adversely affect the quality of the cement. However, this method has not been used as a satisfactory countermeasure due to the secondary reactions caused by the addition of the additive.

또 다른 방법은 미세한 석탄입자를 물리적으로 분리하여 제거하는 방법인 데, 아직 실용화되지 못하고 있다.Another method is a method of physically separating and removing fine coal particles, which has not been put to practical use yet.

이에 본 발명은 상기 종래의 석탄입자 제거방법이 가진 단점을 해결하기 위하여 고안된 것으로, 플라이애쉬 속에 연소되지 않고 잔존하는 미세한 석탄입자를 저비용으로 고효율로 제거하여 플라이애쉬를 산업자원으로 재활용할 수 있도록 한 플라이애쉬 속의 미연소 석탄입자를 제거하는 방법과 그 장치를 제공함에 목적이있는 것이다.Accordingly, the present invention is designed to solve the disadvantages of the conventional coal particle removal method, and to remove the fine coal particles remaining in the fly ash without burning in high efficiency at low cost to recycle the fly ash as industrial resources. It is an object of the present invention to provide a method and apparatus for removing unburned coal particles in fly ash.

도 1은 본 발명에 따른 플라이애쉬속에 포함된 석탄입자를 제거하는 장치를 개략적으로 도시한 결합단면도이다.1 is a cross-sectional view schematically showing a device for removing coal particles contained in the fly ash according to the present invention.

※ 도면의 주요부분에 대한 부호의 설명※※ Explanation of code about main part of drawing ※

10: 석탄분해로 11: 내화단열벽체10: coal cracking furnace 11: fireproof insulation wall

12: SiC코팅층 13: Syn가스 유입구12: SiC coating layer 13: Syn gas inlet

14: 플라이애쉬 유입구 15: 배기구14: fly ash inlet 15: exhaust

상기 목적을 달성하기 위한 본 발명은 Syn 가스버너 내부에서 H2와 CO혼합가스를 연소하여 열과 H2O 및 CO2가스를 생성하는 단계와, 상기 Syn 가스버너에서 생성한 열과 H2O 및 CO2가스를 석탄분해로에 주입하여 상기 석탄분해로의 내부온도를 고온으로 유지시키는 단계와, 상기 고온의 석탄분해로 내부에 플라이애쉬를 투입하여 상기 플라이애쉬에 잔존하는 석탄입자를 H2O 및 CO2분자와 각각 반응시켜 Syn가스로 배출시키는 단계로 이루어진다.The present invention for achieving the above object is generated and a step of combustion of the H2 and CO gas mixture inside the Syn gas burner generating heat and H 2 O and CO 2 gas, in the Syn gas burner heat and H 2 O and CO 2 Injecting gas into the coal cracking furnace to maintain the internal temperature of the coal cracking furnace at a high temperature; and inserting fly ash into the hot coal cracking furnace to dispose of coal particles remaining in the fly ash in H 2 O and CO; Each step is reacted with 2 molecules and is discharged to Syn gas.

또한 본 발명에 따른 석탄입자 제거장치는 H2와 CO의 Syn가스를 생성하는 Syn가스 버너와 연결되어 상기 Syn가스 버너에서 발생한 고온의 H20와 CO2를 유입시켜 충전시키고, 아울러 석탄의 연소시 발생하는 플라이애쉬를 유입시켜 상기 플라이애쉬에 잔존하는 석탄입자를 고온하에서 상기 H20와 CO2와 각각 반응시켜 CO와 H2로 배출시키는 석탄분해로로 이루어진다.In addition, the coal particle removal device according to the invention is connected to the Syn Gas burner for generating Syn gas of H 2 and CO to, and fill, the inlet for the high temperature of the H 2 0 and CO 2 generated in the Syn gas burner, as well as the combustion of coal It is made of a coal cracking furnace in which the fly ash generated during the reaction is introduced to react the coal particles remaining in the fly ash with the H 2 O and CO 2 , respectively, and discharge them to CO and H 2 under high temperature.

상기한 바와 같이 구성되는 본 발명은 Syn가스의 고온의 열을 플라이애쉬 속에 잔존하는 석탄입자를 CO와 H2로 가스화할 때 반응열로 사용하므로 별도의 연소열을 사용할 필요가 없어 비용이 저렴하고, 또한 석탄입자의 반응이 고온에서 반응속도가 매우 빨라서 플라이애쉬 속에 포함된 석탄입자의 제거효율이 높다.The present invention configured as described above uses high-temperature heat of Syn gas as reaction heat when gasifying coal particles remaining in the fly ash into CO and H 2 , so that it is not necessary to use separate combustion heat, and thus the cost is low. The reaction rate of coal particles is very fast at high temperature, so the removal efficiency of coal particles contained in fly ash is high.

이하, 본 발명의 실시예를 첨부도면에 따라 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail according to the accompanying drawings.

도 1은 본 발명에 따른 플라이애쉬 속의 석탄입자를 제거하는 장치의 개략적인 구성을 도시한 단면도이다.1 is a cross-sectional view showing a schematic configuration of an apparatus for removing coal particles in a fly ash according to the present invention.

도시되지 않은 Syn가스버너는 반응식 1에 도시된 바와 같이, H2와 CO혼합가스를 연소하여 열과 H2O 및 CO2가스를 생성한다.Syngas burner, not shown, burns H 2 and CO mixed gas to generate heat and H 2 O and CO 2 gases, as shown in Scheme 1.

H2+ ½2O2→H2OH 2 + ½ 2 O 2 → H 2 O

CO + ½2O2→CO2 CO + ½ 2 O 2 → CO 2

상기 Syn 가스버너에서 생성한 열과 H2O 및 CO2가스는 가스유입구(13)를 통하여 석탄분해로(10)에 유입되어 내부온도를 고온으로 상승시키게 된다. 석탄을 연소할 때 발생하는 플라이애쉬를 내부가 고온으로 유지된 석탄분해로(10) 내부로 플라이애쉬 유입구(14)를 통하여 유입시키면, 상기 플라이애쉬에 잔존하는 석탄입자는 상기 석탄분해로(10)내부에서 아래의 반응식 2와 같이 H2O 및 CO2분자와 각각 반응하여 Syn가스를 생성한다.The heat generated by the Syn gas burner and H 2 O and CO 2 gas are introduced into the coal cracking furnace 10 through the gas inlet 13 to raise the internal temperature to a high temperature. When the fly ash generated when burning coal is introduced into the coal cracking furnace 10 in which the inside is kept at a high temperature through the fly ash inlet 14, the coal particles remaining in the fly ash are passed through the coal cracking furnace 10. Inside, the reaction is performed with H 2 O and CO 2 molecules, respectively, as in Scheme 2 below to generate Syn gas.

H2O + C →CO + H2 H 2 O + C → CO + H 2

CO2+ C →2COCO 2 + C → 2CO

즉, 플라이애쉬 속에 포함되어 있던 석탄입자(C)는 CO로 변화된 후, H2O와반응하여 H2와 CO2로 변화되어 배기구(15)를 통하여 석탄분해로(10)의 외부로 배출되어 제거된다.That is, the coal particles (C) were included in the fly ash is discharged and then changed to CO, outside of the H 2 O and the reaction is changed into H 2 and CO 2 coal decomposition through an exhaust port (15) (10) Removed.

여기서 상기 H2는 회수하여 청정연료로 사용될 수 있고, 석탄분해로(10)의 내부에서 생성된 상기 Syn가스(H2+CO)는 고온이므로 배기구(15)를 통하여 회수되어 다시 Syn가스 버너로 재순환하여 사용된다.Here, the H 2 may be recovered and used as a clean fuel, and the Syn gas (H 2 + CO) generated inside the coal cracking furnace 10 may be recovered through the exhaust port 15 because of high temperature, and then back to the Syn gas burner. Used for recycling.

석탄입자가 제거된 플라이애쉬는 석탄분해로(10)의 하부에 구비된 배출구(16)를 통하여 수집된 후 시멘트 재료로 재활용된다.The fly ash from which coal particles are removed is collected through the outlet 16 provided in the lower part of the coal cracking furnace 10 and then recycled into cement material.

한편, 상기 석탄분해로(10)는 도 1에 도시된 바와 같이, 세라믹파이버의 일종인 cerakwool로 만들어진 내화단열벽체(11)와, 상기 내화단열벽체(11)의 내측벽에 형성된 SiC코팅층(12)을 구비한다.Meanwhile, as illustrated in FIG. 1, the coal cracking furnace 10 includes a fireproof insulation wall 11 made of cerakwool, which is a kind of ceramic fiber, and a SiC coating layer 12 formed on an inner wall of the fireproof insulation wall 11. ).

상기한 바와 같이, 본 발명은 Syn가스의 고온의 열을 플라이애쉬 속에 잔존하는 석탄입자를 CO와 H2로 가스화할 때 반응열로 사용하므로 별도의 연소열을 사용할 필요가 없어 비용이 저렴하고, 또한 석탄입자의 반응이 고온에서 반응속도가 매우 빨라서 플라이애쉬 속에 포함된 석탄입자의 제거효율이 높다.As described above, the present invention uses high-temperature heat of Syn gas as the reaction heat when gasifying coal particles remaining in the fly ash into CO and H 2 , so that it is not necessary to use separate combustion heat, and thus the cost is low. The reaction of particles is very fast at high temperature, so the removal efficiency of coal particles contained in fly ash is high.

Claims (2)

Syn 가스버너 내부에서 H2와 CO혼합가스를 연소하여 열과 H2O 및 CO2가스를 생성하는 단계와, 상기 Syn 가스버너에서 생성한 열과 H2O 및 CO2가스를 석탄분해로에 주입하여 상기 석탄분해로의 내부온도를 고온으로 유지시키는 단계와, 상기 고온의 석탄분해로 내부에 플라이애쉬를 투입하여 상기 플라이애쉬에 잔존하는 석탄입자를 H2O 및 CO2분자와 각각 반응시켜 Syn가스로 배출시키는 단계;를 포함한 플라이애쉬 속에 잔존하는 석탄입자를 제거하는 방법.And the step of combusting the H 2 and CO gas mixture inside the Syn gas burner generating heat and H 2 O and CO 2 gas, is injected into the column and H 2 O and CO 2 gas generated in the Syn Gas burner for a coal decomposition Maintaining the internal temperature of the coal cracking furnace at a high temperature; and adding a fly ash into the hot coal cracking furnace to react the coal particles remaining in the fly ash with H 2 O and CO 2 molecules, respectively, to syngas. Method for removing coal particles remaining in the fly ash including; H2와 CO의 Syn가스를 생성하는 Syn가스 버너와 연결되어 상기 Syn가스 버너에서 발생한 고온의 H20와 CO2가 가스유입구(13)를 통하여 내부로 유입되고, 석탄의 연소시 발생하는 플라이애쉬는 플라이애쉬 유입구(14)를 통하여 내부로 유입되어 상기 플라이애쉬에 잔존하는 석탄입자가 상기 고온의 H20와 CO2와 각각 반응하여 CO와 H2로 배출되는 석탄분해로(10)로 이루어진 플라이애쉬 속에 잔존하는 석탄입자를 제거하는 장치.It is connected to the Syn Gas burner for generating Syn gas of H 2 and the CO is introduced into the high temperature of the H 2 0 and CO 2 generated in the Syn Gas burner through the gas inlet (13), fly generated during the combustion of coal Ash is introduced into the interior through the fly ash inlet 14 to the coal cracking furnace 10 in which coal particles remaining in the fly ash react with the high temperature H 2 0 and CO 2 , respectively, and are discharged to CO and H 2 . Apparatus for removing coal particles remaining in the fly ash.
KR1020020035780A 2002-06-25 2002-06-25 Method of removing unburnt coal powder in flyash and apparatus of the same KR20040000818A (en)

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CN111662029A (en) * 2019-03-07 2020-09-15 金富烈 Fly ash recycling device with built-in glass film removing function
CN111662029B (en) * 2019-03-07 2022-05-24 金富烈 Fly ash recycling device with built-in glass film removing function

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