KR19990052656A - Surface Combustion Burner with Heat Insulation Plate - Google Patents
Surface Combustion Burner with Heat Insulation Plate Download PDFInfo
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- KR19990052656A KR19990052656A KR1019970072170A KR19970072170A KR19990052656A KR 19990052656 A KR19990052656 A KR 19990052656A KR 1019970072170 A KR1019970072170 A KR 1019970072170A KR 19970072170 A KR19970072170 A KR 19970072170A KR 19990052656 A KR19990052656 A KR 19990052656A
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- mat
- combustion
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- plate
- mixed gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/12—Radiant burners
- F23D14/14—Radiant burners using screens or perforated plates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
- F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
- F23D14/08—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with axial outlets at the burner head
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details
- F23D14/62—Mixing devices; Mixing tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2203/00—Gaseous fuel burners
- F23D2203/10—Flame diffusing means
- F23D2203/103—Flame diffusing means using screens
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2203/00—Gaseous fuel burners
- F23D2203/10—Flame diffusing means
- F23D2203/105—Porous plates
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
본 발명은 연소가 일어나는 다공성 매트의 하부에 단열판을 설치하여 매트의 적열에 의한 후방복사열 및 전도열을 차단함에 따라 매트에 공급되는 연료 및 공기로의 열전달을 방지하여 연료 및 공기의 온도상승을 억제함과 아울러 역화의 위험성을 배제하면서 연소용 공기의 예열온도를 극대화할 수 있게한 단열판이 장착된 표면연소버너에 관한 것으로,The present invention is to prevent the heat transfer to the fuel and air supplied to the mat to suppress the temperature rise of the fuel and air by installing a heat insulating plate in the lower portion of the porous mat where combustion occurs by blocking the rear radiant heat and conduction heat due to the mat's red light In addition, the present invention relates to a surface combustion burner equipped with a heat insulating plate capable of maximizing the preheating temperature of combustion air while eliminating the risk of backfire.
즉, 버너의 저면에 그 내부로 연료/공기혼합가스를 분사하게 분배기를 구비한 혼합가스공급관이 설치되고, 상기 분배기의 상측에 정류기능을 가진 다공판을 매개로 매트를 설치하되 상기 매트의 하부측에 혼합가스의 흐름을 용이하게 함과 아울러 압력손실이 적도록 다수의 미세한 구멍이 뚫려있는 다공판 또는 내부 공극률이 큰 판체로 되어 연소열의 전달을 방지하는 적어도 하나의 단열판이 설치됨에 따라, 안전하게 사용함과 아울러 열효율을 향상시키게 된 것이다.That is, a mixed gas supply pipe having a distributor is installed on the bottom of the burner to inject fuel / air mixed gas therein, and a mat is installed on the upper side of the distributor via a porous plate having a rectifying function. At least one heat insulation plate is installed on the side to facilitate the flow of the mixed gas and to provide a low pressure loss and a porous plate having a large number of fine holes or a plate having a large internal porosity to prevent the transfer of combustion heat. In addition to improving the thermal efficiency.
Description
본 발명은 단열판이 장착된 표면연소버너, 더욱 상세하게는 연소가 일어나는 다공성 매트의 하부에 단열판을 설치하여 매트의 적열에 의한 후방복사열 및 전도열을 차단함에 따라 매트에 공급되는 연료 및 공기로의 열전달을 방지하여 연료 및 공기의 온도상승을 억제함과 아울러 역화의 위험성을 배제하면서 연소용 공기의 예열온도를 극대화할 수 있게한 단열판이 장착된 표면연소버너에 관한 것이다.The present invention provides a heat transfer to the fuel and air supplied to the mat by blocking the rear radiant heat and conduction heat by the heat of the mat is installed by installing a heat insulating plate in the lower portion of the surface combustion burner equipped with a heat insulating plate, more specifically the porous mat in which combustion occurs The present invention relates to a surface combustion burner equipped with a heat insulating plate capable of maximizing the preheating temperature of the combustion air while preventing the temperature rise of fuel and air and preventing the backfire.
일반적으로, 산업용 보일러나 가열로 및 산업체의 가열공정에서 사용되는 연소기기에 있어서 요구되는 가장 중요한 항목중의 하나가 연소기기의 안전성이라 할 수 있다.In general, one of the most important items required for the combustion equipment used in industrial boilers, heating furnaces and industrial heating process is the safety of the combustion equipment.
가스연료용 연소기는 안전성을 확보하기 위하여 연료와 공기를 버너에 별도로 공급하는 소위 확산연소를 채택하여 역화 등의 위험적인 연소를 방지하고 있다.Combustor for gas fuel adopts so-called diffusion combustion which supplies fuel and air to burner separately to ensure safety and prevents dangerous combustion such as backfire.
그러나 표면연소기는 상기 확산연소방법과 달리 공기와 연료를 사전에 혼합하여 버너에 공급하기 때문에 역화의 위험성이 상존하였다.However, unlike the diffusion combustion method, the surface combustor mixes air and fuel in advance and supplies the burner with the risk of backfire.
그 일례로서, 세라믹 재질을 사용하는 난방용 히터(heater)는 일정 연소부하 이상에서는 과열로 인한 역화가 발생되는 것으로 지적되고 있다.As an example, it is pointed out that a heater for heating using a ceramic material causes backfire due to overheating above a certain combustion load.
표면연소기에서 버너에 도입된 혼합가스는 매트로부터의 열전달에 의해 공급온도보다 약 200℃정도 온도가 상승된 상태로 매트에 분사되어 연소되는 것으로 알려져 있는데, 이와 같은 매트 후방으로의 열전달은 과부하나 제어이상등 비정상적인 연소조건에서는 보다 큰 역화의 위험성이 있었다.It is known that the mixed gas introduced into the burner in the surface combustor is injected into the mat and burned with the temperature rising about 200 ° C. above the supply temperature by heat transfer from the mat. Under abnormal combustion conditions, there was a risk of greater backfire.
또한 통상의 연소설비에서는 연소로 출구의 연도상에 공기 열교환기를 설치하고, 연소가스의 폐열을 이용하여 연소용공기를 예열한 후 버너에 공급함으로서 연료절약을 꾀하고 있다.In addition, in a normal combustion facility, an air heat exchanger is installed on the flue at the exit of the combustion furnace, and preheating the combustion air using the waste heat of the combustion gas is performed to supply fuel to the burner.
연소용공기의 예열온도가 높을수록 외부로 방출되는 연소가스의 온도가 저하되므로 연소용공기의 온도는 가능한 한 높게 유지하는 것이 바람직하다.As the preheating temperature of the combustion air is higher, the temperature of the combustion gas discharged to the outside is lowered, so it is desirable to keep the temperature of the combustion air as high as possible.
그러나 통상의 혼합연소에서는 연료의 자연착화온도(천연가스의 경우 500∼650℃) 이상으로 연소용공기를 예열하는 경우는 온도만으로 점화가 되므로, 대부분의 경우 공기의 예열을 행하지 않는 것이 보편적이므로 이는 열효율의 저하를 수반하였다.However, in normal mixed combustion, when preheating combustion air above the natural ignition temperature of fuel (500 ~ 650 ℃ for natural gas), only the temperature is ignited, so in most cases it is common not to preheat the air. Accompanied by a decrease in thermal efficiency.
또한 연소용공기를 예열하는 경우에 있어서도 예열공기의 온도를 낮게 유지해야만 하는 것이었다.In addition, when preheating combustion air, the temperature of the preheated air had to be kept low.
더구나 표면연소의 경우는 혼합가스가 매트로부터의 열전달에 의해 온도가 상승하므로, 최대 공기예열온도가 300℃를 초과하기가 사실상 불가능하였다.Moreover, in the case of surface combustion, since the temperature of the mixed gas is increased by heat transfer from the mat, it is virtually impossible for the maximum air preheating temperature to exceed 300 ° C.
따라서 종래의 표면연소버너는 역화의 우려와 공기 예열온도의 저하에 의하여 열효율이 떨어지는 문제점이 있었다.Therefore, the conventional surface combustion burner has a problem that the thermal efficiency is lowered by the concern of backfire and lowering of the air preheating temperature.
본 발명은 위와 같은 종래의 표면연소버너의 문제점을 감안하여 안출한 것으로, 그 목적은 연소가 일어나는 매트 하부에 매트로부터 혼합가스로에 전달되는 열을 차단할 수 있는 방지할 수 있는 단열판이 장착된 표면연소버너를 제공하는 것이다.The present invention has been made in view of the problems of the conventional surface combustion burner as described above, the object of which is the surface combustion is equipped with a heat insulating plate that can prevent the heat transferred from the mat to the mixed gas to the bottom of the mat where combustion occurs To provide a burner.
이러한 목적을 달성하기 위한 본 발명은, 버너의 저면에 그 내부로 연료/공기혼합가스를 분사하게 분배기를 구비한 혼합가스공급관이 설치되고, 상기 분배기의 상측에 정류기능을 가진 다공판을 매개로 매트가 설치된 표면연소버너에 있어서, 상기 매트의 하부측에 혼합가스의 흐름을 용이하게 함과 아울러 압력손실이 적도록 다수의 미세한 구멍이 뚫려있는 다공판 또는 내부 공극률이 큰 판체로 되어 혼합가스로의 연소열의 전달을 방지하는 적어도 하나의 단열판이 설치됨에 따라, 안전하게 사용함과 아울러 열효율을 향상시킴을 특징으로 한다.In order to achieve the above object, the present invention provides a mixed gas supply pipe having a distributor for injecting fuel / air mixed gas into the bottom of the burner, and through a porous plate having a rectifying function at an upper side of the distributor. In the surface combustion burner provided with a mat, a porous plate having a plurality of fine holes or a plate having a large internal porosity to facilitate the flow of the mixed gas on the lower side of the mat and to reduce the pressure loss to the mixed gas. As at least one insulation plate is installed to prevent the transfer of heat of combustion, it is characterized in that it is used safely and improves thermal efficiency.
도 1은 종래의 기술에 의한 표면연소버너의 구성도,1 is a block diagram of a surface combustion burner according to the prior art,
도 2는 본 발명의 실시예의 단열판이 장착된 표면연소버너의 구성도이다.2 is a block diagram of a surface combustion burner equipped with a heat insulating plate according to an embodiment of the present invention.
< 도면의 주요부분에 대한 부호의 설명 ><Description of Symbols for Major Parts of Drawings>
10 : 버너 20 : 혼합가스공급관10: burner 20: mixed gas supply pipe
21 : 분배기 30 : 다공판21: divider 30: perforated plate
40 : 매트 50 : 단열판40: mat 50: insulation board
이하, 본 발명의 단열판이 장착된 표면연소버너를 첨부도면을 참조하여 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings, the surface combustion burner equipped with a heat insulating plate of the present invention will be described.
도 1은 종래의 표면연소버너의 일예를 나타낸 구성도로서, 연료/공기혼합장치에서 혼합된 혼합가스(G)가 버너(1)의 하부를 관통하여 설치된 혼합가스공급관(2)을 통해 유입된 후 분배기(3)에의해 버너의 내부에서 분사되고, 상기 분배기(3)를 통하여 분사된 혼합가스는 정류기능을 갖는 다공판(4)을 통하여 매트(5)에 공급되어 이 부분에서 연소가 이루어지게 됨에 따라, 상기 매트(5)가 적열되어 피열물(6)로 고체복사와 대류에 의한 열전달이 일어난다.1 is a configuration diagram showing an example of a conventional surface combustion burner, the mixed gas (G) mixed in the fuel / air mixing apparatus is introduced through the mixed gas supply pipe (2) installed through the lower portion of the burner (1) Then, the gas is injected into the burner by the distributor 3, and the mixed gas injected through the distributor 3 is supplied to the mat 5 through the porous plate 4 having a rectifying function, and combustion occurs at this portion. As it is, the mat (5) is glowing to heat transfer by solid radiation and convection to the object to be heated (6).
그러나 상기 종래의 표면연소버너에서는 매트(5)로부터 그 하부의 혼합가스로 직접전도와 복사열전달이 발생하게 되어 매트에 도달하기 전의 혼합가스 온도가 상승함에 따라, 표면연소 이외의 일반적인 버너에서보다 역화의 위험성이 크게 되었고, 상기 역화가 발생될 경우 화염이 혼합가스공급관(4)을 통하여 혼합가스공급관까지 전파되면서 안정상 큰 위험성이 있었음은 위에서 설명한 바 있다.However, in the conventional surface combustion burner, direct conduction and radiant heat transfer are generated from the mat 5 to the mixed gas thereunder, so that the temperature of the mixed gas before reaching the mat rises, which makes it more backfired than in a general burner other than surface combustion. The risk of increased, and when the backfire occurs, the flame propagates through the mixed gas supply pipe 4 through the mixed gas supply pipe 4, there was a great risk in stability as described above.
또한 버너내부에서 발생되는 혼합가스의 온도상승은 공기의 예열온도에 제약조건으로 작용하면서 고온의 예열공기를 사용할 때에 자연발화의 문제점이 있었다.In addition, the temperature rise of the mixed gas generated inside the burner acts as a constraint on the preheating temperature of the air, and there is a problem of spontaneous ignition when using high temperature preheating air.
통상 복사열은 마주보는 두 물체사이에서 일어나는 데, 고온부에서 저온부로의 순수한 복사열 전달량은 이론적으로 고온부 온도 4승에서 저온부 온도의 4승을 뺀 값에 비례하며, 이 원리에 따라 대부분이 스테인레스 스틸로 구성되는 고온의 매트(5)에서 다공판(4)으로, 이 다공판(4)에서 분배기(3)로 복사열이 전도되어 결국 혼합기의 온도가 상승하는 것이며, 따라서 도 1의 기술은 혼합가스의 온도상승을 근본적으로 해결할 수 없는 문제점이 있었다.Normally radiant heat occurs between two opposing objects, and the net radiant heat transfer from the hot zone to the cold zone is theoretically proportional to the quadratic temperature of the hot zone minus the quadratic of the cold zone temperature, most of which consist of stainless steel. The radiant heat is conducted from the hot mat 5 to the porous plate 4 and from the porous plate 4 to the distributor 3 so that the temperature of the mixer rises, so that the technique of FIG. There was a problem that could not fundamentally resolve the rise.
도 2는 본 발명의 실시예의 단열판이 부착된 표면연소버너의 구조를 나타낸 것으로, 단열성을 갖는 세라믹과 철피로된 버너(10)의 저면에 그 내부로 연료/공기혼합가스를 분사하게 분배기(21)를 구비한 혼합가스공급관(20)이 설치되고, 상기 분배기(21)의 상측에 정류기능을 가진 다공판(30)을 매개로 매트(40)가 설치되어 있다.2 shows a structure of a surface combustion burner with a heat insulating plate according to an embodiment of the present invention, and dispenses the fuel / air mixture gas into the bottom surface of the burner 10 made of a ceramic and steel bar having heat insulation therein. ), A mixed gas supply pipe 20 is installed, and a mat 40 is installed on the upper side of the distributor 21 via a porous plate 30 having a rectifying function.
상기 매트(40)의 하부측에는 연소열의 역화를 방지하게 적어도 하나의 단열판(50)이 설치되어 있다.At least one heat insulating plate 50 is provided on the lower side of the mat 40 to prevent backfire of combustion heat.
이 단열판(50)은 혼합가스의 흐름이 용이함과 아울러 압력손실이 적도록 다수의 미세한 구멍이 뚫려있는 다공판 또는 내부 공극률이 큰 판체로 하는 것이 바람직하나, 복사율과 열전도율이 작은 단열성 다공체(예, 다공 세라믹판, 세라믹 폼(foam), 세라믹 파이버 매트(ceramic fiber mat등)로서 상측의 매트(40)로 부터의 복사열을 충분히 차단할 수 있는 것이라면 무방하다.The insulating plate 50 is preferably a porous plate having a plurality of fine holes or a plate having a large internal porosity so that the mixed gas flows easily and the pressure loss is small. As long as it is a porous ceramic plate, a ceramic foam, and a ceramic fiber mat (ceramic fiber mat etc.), it can be sufficient to block the radiant heat from the upper mat 40.
또한 상기 단열판(50)은 단층 혹은 다층으로 설치할 수도 있으며 매트(40)와 일체화하는 것도 가능하다.In addition, the insulation plate 50 may be installed in a single layer or multiple layers, or may be integrated with the mat 40.
따라서, 상기와 같은 본 발명은 고온의 연소가 발생되는 매트(40)의 하부에 단열판(50)을 접촉 또는 근접되게 설치할 경우 단열판(50)의 열전도도가 매우 낮게되어 매트(40)로부터 혼합가스로 전도되는 열전달량은 미소하게 된다.Therefore, in the present invention as described above, the thermal conductivity of the heat insulating plate 50 becomes very low when the heat insulating plate 50 is installed in contact with or close to the lower portion of the mat 40 where high-temperature combustion is generated. The amount of heat transfer to the substrate becomes small.
복사열 전달의 경우에는 단열판(50) 자체의 복사율이 매우 작기 때문에 단열판의 온도상승은 종래 버너의 다공판(6)에 가해진 온도상승보다 매우 작은 것이다.In the case of radiant heat transfer, since the radiation rate of the insulation board 50 itself is very small, the temperature rise of the insulation board is much smaller than the temperature rise applied to the porous plate 6 of the conventional burner.
이때, 복사율을 더욱 낮출 필요성이 있을 경우 매트(40)와 마주보는 단열판(50)의 상부에 반사체를 코팅하는 것도 가능하다.In this case, when there is a need to further lower the emissivity, it is also possible to coat the reflector on the top of the heat insulating plate 50 facing the mat 40.
또한 복사현상은 두 열원이 상호 마주볼때만 일어나므로, 상기 단열판(50)이 매트(40)와 혼합가스간의 직접 복사를 차단하기 때문에 결과적으로 혼합가스 온도의 상승을 방지할 수 있는 것이다.In addition, the radiation occurs only when the two heat sources face each other, so that the insulation plate 50 blocks direct radiation between the mat 40 and the mixed gas, so that the rise of the mixed gas temperature can be prevented.
그러므로, 매트(40)하부에 단열판(50)을 설치하면 혼합가스의 온도상승을 근본적으로 방지하게 되어 역화의 위험성을 예방할 수 있고, 종래의 표면연소버너에 비해 연소용 공기의 온도를 약 200℃ 정도로 상승되게 예열할 수 있으므로 연소설비의 열효율을 높일 수 있다.Therefore, if the heat insulating plate 50 is installed under the mat 40, the temperature rise of the mixed gas is essentially prevented, and the risk of backfire can be prevented, and the temperature of the combustion air is about 200 ° C. compared with the conventional surface combustion burner. It can be preheated to an extent that can increase the thermal efficiency of the combustion plant.
이와 같은 본 발명의 단열판이 장착된 표면연소버너는 고온의 연소가 일어나는 매트로부터 혼합가스로 전도되는 열의 전달을 차단하여 안전하게 사용하게 됨은 물론 연소용 공기의 고온예열이 가능하게 됨으로써 연소효율을 높일 수 있는 등의 효과가 있다.Such a surface combustion burner equipped with a heat insulating plate of the present invention blocks the transfer of heat conducted from the mat where the high temperature combustion takes place to the mixed gas, and can be used safely, as well as high temperature preheating of the air for combustion can increase the combustion efficiency. There is such an effect.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019970072170A KR19990052656A (en) | 1997-12-23 | 1997-12-23 | Surface Combustion Burner with Heat Insulation Plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019970072170A KR19990052656A (en) | 1997-12-23 | 1997-12-23 | Surface Combustion Burner with Heat Insulation Plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR19990052656A true KR19990052656A (en) | 1999-07-15 |
Family
ID=66099056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019970072170A Withdrawn KR19990052656A (en) | 1997-12-23 | 1997-12-23 | Surface Combustion Burner with Heat Insulation Plate |
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| Country | Link |
|---|---|
| KR (1) | KR19990052656A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030093570A (en) * | 2002-06-03 | 2003-12-11 | 엘지전자 주식회사 | Insulation structure of gas radiation oven range |
| KR100864846B1 (en) * | 2007-06-21 | 2008-10-23 | 주식회사 파세코 | Premix Combustion Burner |
| KR20190009266A (en) * | 2017-07-18 | 2019-01-28 | 린나이코리아 주식회사 | all primary combustion type burner |
| KR102036286B1 (en) * | 2018-04-20 | 2019-11-26 | 한국에너지기술연구원 | Large area Nonoxidizing uniformity injection porous combustion |
| CN112594688A (en) * | 2020-11-19 | 2021-04-02 | 华帝股份有限公司 | Combustion body assembly with heat insulation and gas distribution structure |
-
1997
- 1997-12-23 KR KR1019970072170A patent/KR19990052656A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030093570A (en) * | 2002-06-03 | 2003-12-11 | 엘지전자 주식회사 | Insulation structure of gas radiation oven range |
| KR100864846B1 (en) * | 2007-06-21 | 2008-10-23 | 주식회사 파세코 | Premix Combustion Burner |
| KR20190009266A (en) * | 2017-07-18 | 2019-01-28 | 린나이코리아 주식회사 | all primary combustion type burner |
| KR102036286B1 (en) * | 2018-04-20 | 2019-11-26 | 한국에너지기술연구원 | Large area Nonoxidizing uniformity injection porous combustion |
| CN112594688A (en) * | 2020-11-19 | 2021-04-02 | 华帝股份有限公司 | Combustion body assembly with heat insulation and gas distribution structure |
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