KR900007258B1 - Burner nozzle manufacturing method - Google Patents

Burner nozzle manufacturing method Download PDF

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Publication number
KR900007258B1
KR900007258B1 KR1019880004201A KR880004201A KR900007258B1 KR 900007258 B1 KR900007258 B1 KR 900007258B1 KR 1019880004201 A KR1019880004201 A KR 1019880004201A KR 880004201 A KR880004201 A KR 880004201A KR 900007258 B1 KR900007258 B1 KR 900007258B1
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South Korea
Prior art keywords
oxide
nozzle
burner nozzle
ceramic
water
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KR1019880004201A
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Korean (ko)
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KR890016331A (en
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이재현
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태평전자요업 주식회사
이재현
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Publication of KR900007258B1 publication Critical patent/KR900007258B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/38—Nozzles; Cleaning devices therefor
    • 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, e.g. noise reduction means
    • F23D14/48—Nozzles

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Gas Burners (AREA)

Abstract

A burner nozzle is produced by the stages of crushing 50-56 wt.% SiO2, 20-24 wt.% Al2O3, 2-3 wt.% ZrO2, 1.5-3 wt.% CaO, 8-11 wt.% MgO, 2-4 wt.% Cr2O3, 3-4 wt.% Fe2O3, 0.5-1 wt.% Co8O, 1.5-3 wt.% MnO2 and 1-1.5 wt.% LiO2 as the infrared radiating ceramic material, mixing with 0.5-1.5 wt.% organic adhesive e.g. polyvinylalcohol, polyvinylacetate and 40-50 wt.% water to the weight of the ceramic materials, press-moulding into the form of nozzle and sintering at the temp. of 1300-1400 deg.C. The nozzle has a good resistance of heat, corrosion and chemicals.

Description

적외선 방사 세라믹재 버너노즐의 제조방법Infrared radiation ceramic burner nozzle manufacturing method

본 발명은 알콜, 석유, 천연가스, 도시가스, LPG, 부탄등의 액체 혹은 기체연료를 연소시키는 버너류에 사용되는 연료의 분사와 연소가 이루어지는 노즐부를 고온 소결된 세라믹재로 제조하는 방법에 관한 것이다.The present invention relates to a method for producing a nozzle portion in which fuel injection and combustion are used for burners for burning liquid or gaseous fuels such as alcohol, petroleum, natural gas, city gas, LPG, butane, and the like, using high-temperature sintered ceramic materials. will be.

일반적으로 가정 공업용으로 사용되는 버너류에 있어서 연료의 분사노즐부는 대부분 황동에 내열, 내식성 재료를 배합하여 단조처리에 의하여 제작된 금속재 노즐을 사용하고 있다.In general, in the burners used for the home industry, the injection nozzle part of the fuel mostly uses a metal nozzle manufactured by forging by mixing heat and corrosion resistant materials with brass.

이들 금속재의 노즐은 사용연료의 고급화로 고열량을 내는 추세에 따라(예, LPG의 고열에너지 발열량은 23,000Kcal/m3이다). 노즐이 연소시에 1,000℃ 이상을 얻는 경우가 대부분이다. 따라서 이같은 고온 장시간 지속되면 황동 용융점(약 900℃)에 장시간 노즐이 접촉됨에 따라 노즐의 연화, 열변성, 산화등이 급격히 진행되게 된다.These metal nozzles have a high calorific value due to the use of advanced fuel (eg, LPG has a high heat energy calorific value of 23,000 Kcal / m 3 ). In most cases, the nozzle obtains 1,000 ° C or more at the time of combustion. Therefore, when such a high temperature is maintained for a long time, as the nozzle contacts the brass melting point (about 900 ° C.) for a long time, softening, thermal denaturation, and oxidation of the nozzle proceed rapidly.

예를 들어, 황동합금이 고온에서 연소시 발생되는 일산화탄소(CO), 이산화탄소(CO2)기체와 접촉되면서 표면 부식이 되고 합금중의 아연등의 금속재도 부식, 산화가 되어 노즐의 동공발생, 균열 또한 노즐변형에 따른 연료 연소시 불완전연소 발생 및 안전사고 발생등의 문제점들이 있다.For example, when brass alloy is in contact with carbon monoxide (CO) and carbon dioxide (CO 2 ) gas generated when burning at high temperature, the surface is corroded, and metal materials such as zinc in the alloy are corroded and oxidized to generate pupil holes and cracks. In addition, there are problems such as incomplete combustion and safety accidents during fuel combustion due to nozzle deformation.

본 발명은 내열, 내식, 내약품성이 우수한 세라믹재의 배합으로 되는 노즐 성형품을 고온 소결에 의한 세라믹재 노즐을 제공하므로서 상기한 문제점을 해소하고자 함에 목적이 있다.An object of the present invention is to solve the above problems by providing a ceramic nozzle by high temperature sintering of a nozzle molded article which is a mixture of a ceramic material having excellent heat resistance, corrosion resistance and chemical resistance.

또한 본 발명의 방법으로 얻어진 세라믹재 노즐은 고온에서 세라믹이 연소시 적외선을 방사시키는 효과가 크며, 화학적 변화없이 열이 넓고 고르게 퍼짐으로 세라믹의 단열효과로 난방기(스토브), 건조기, 식품조리가공기(가스렌지)등의 열기구에 있는 공급관이 가열되는 위험도 없게되는 것이 특징이다.In addition, the ceramic nozzle obtained by the method of the present invention has a large effect of radiating infrared rays when the ceramic is burned at a high temperature, the heat is wide and evenly spread without chemical change, so that the heater (stove), dryer, food cooking ( It is characterized in that there is no risk of heating the supply pipe in a hot air balloon such as a gas stove).

본 발명은 알루미나(Al2O3) 20-24%, 산화규소(SiO2) : 50-56%, 지르코니아(ZrO2) 2-3%, 산화칼슘(CaO) : 1.5-3%, 산화마그네슘(MgO) : 8-11%, 산화크롬(Cr2O3) : 2-4%. 산화철(Fe2O3) : 3-4%, 산화코발트(C8O) : 0.5-1%, 산화망간(NnO2) : 1.5-3%, 산화리튬(LiO2) : 1-1.5%의 재료를 미분쇄하여 소성후 소정의 노즐형태로 성형시킨 것을 고온 소결시켜 목적으로 하는 세라믹재 노즐을 제조한다.The present invention is alumina (Al 2 O 3 ) 20-24%, silicon oxide (SiO 2 ): 50-56%, zirconia (ZrO 2 ) 2-3%, calcium oxide (CaO): 1.5-3%, magnesium oxide (MgO): 8-11%, chromium oxide (Cr 2 O 3 ): 2-4%. Iron oxide (Fe 2 O 3 ): 3-4%, cobalt oxide (C 8 O): 0.5-1%, manganese oxide (NnO 2 ): 1.5-3%, lithium oxide (LiO 2 ): 1-1.5% The target ceramic material nozzle is manufactured by sintering the material by pulverizing the material and sintering the molded product into a predetermined nozzle shape after firing.

이상의 원료를 배합함에 있어서 소정의 원료를 균질화하도륵 공지의 분쇄기로 충분히 분쇄하여 100-150메쉬의 입도분포를 갖도록 한다. 분쇄된 것은 폴리비닐알콜, 폴리비닐아세테이트, 카르복시메틸셀룰로스 또는 기타 유기질 접착제를 상기한 세라믹재료의 중량에 대하여 0.5-1.5%로 물 40-50%와 배합하여 공지의 볼밀등으로 50-80시간 미분쇄한 다음 스프레이 드라이어로 과립화하거나 필터프레스로 수분 10% 이하의 케익상태로 탈수한후 과립으로 만를어진 재료를 요구하는 모양과 칫수의 금형에 충진하여 550Kg/㎠ 이상의 고압에 의하여 압축성형한 것을 공지의 소성로에서 1,300-1,400℃의 온도로 단계적 소성을 하면 목적으로 하는 세라믹재의 노즐이 얻어진다.In blending the above raw materials, a predetermined raw material is sufficiently pulverized with a known pulverizer to homogenize the raw materials to have a particle size distribution of 100-150 mesh. The pulverized product is blended with polyvinyl alcohol, polyvinylacetate, carboxymethylcellulose or other organic adhesive at 0.5-1.5% by weight of the above-mentioned ceramic material with 40-50% of water, and is not 50-80 hours by a known ball mill. Crushed, granulated with a spray dryer or dehydrated with a filter press to a cake state of 10% or less of moisture, and then filled into a mold of the shape and size required by the granulated material, followed by compression molding under a high pressure of 550 Kg / ㎠ or more. When the stepwise firing is carried out at a temperature of 1,300-1,400 ° C. in a known firing furnace, a nozzle of a target ceramic material is obtained.

[실시예]EXAMPLE

산화규소 5.4Kg, 고순도알루미나 2.15Kg, 산화마그네슘 0.9Kg, 산화크롬 0.3Kg, 지르코니아 0.2Kg, 산화칼슘 0.2Kg, 산화철 0.4Kg, 산화코발트 0.08Kg, 산화망간 0.25Silicon oxide 5.4Kg, high purity alumina 2.15Kg, magnesium oxide 0.9Kg, chromium oxide 0.3Kg, zirconia 0.2Kg, calcium oxide 0.2Kg, iron oxide 0.4Kg, cobalt oxide 0.08Kg, manganese oxide 0.25

Kg, 산화리튬 0.12Kg을 공지의 분쇄기로 60시간 연속 분쇄시켜서 l00메쉬 이하로 되는 것을 체거름하여 얻었다.Kg and 0.12 Kg of lithium oxide were continuously pulverized for 60 hours with a known pulverizer, and sieved to obtain less than 100 mesh.

이것에 PVA l00g, 물 8Kg을 넣은 슬러리를 공지의 볼밀기로 72시간 미분시켜서 얻은 반죽을 필터프레스로 수분함량 6%로 압축한 것을 직경 0.1-0.5mm가 되도록 과립화하였다. 이 과립체를 세공 가스렌지용 노즐제작용 금형에 넣고 유압기에(프레스성형) 의하여 60Kg/Cm2로 압축시킨 다음 소성로에 옮겨 온도는600℃에서 3-5시간 지속시킨 다음 계속 온도를 상승시켜 1,300℃-1,400℃ 올려 1시간 지속소결시키고 이어서 서서히 실온으로 냉각시키면 세라믹재 노즐이 얻어진다.The dough obtained by finely pulverizing a slurry containing PVA 100 g and 8 Kg of water for 72 hours with a known ball mill was granulated to a diameter of 0.1-0.5 mm by compressing the dough obtained by a filter press to a water content of 6%. The granules were put into a nozzle-forming mold for a pore gas stove and compressed to 60 Kg / Cm 2 by a hydraulic press (press molding), and then transferred to a kiln, where the temperature was maintained at 600 ° C. for 3-5 hours, and the temperature was continuously increased to 1,300. The ceramic material nozzle is obtained by raising sintering at 1 degreeC-1400 degreeC for 1 hour, and then cooling slowly to room temperature.

상기한 실시예에 따른 노즐은 공지의 황동등의 금속노즐과는 달리 1,400℃ 전후에서 소결된 것으로서 일반가정용 렌지의 경우 최고 1,000-1,200℃까지 온도상승이 되는 LPG 연소기에 사용되어도 극히 안정될수 있으며, 내열 내약품성을 갖는 구조로서, 산화, 열변성, 약품변성이 전혀 발견되지 않으며 완전연소가 이루어진다.The nozzle according to the above embodiment is sintered at around 1,400 ° C. unlike a metal nozzle such as brass, which is well known, and can be extremely stable even when used in an LPG combustor that has a temperature rise up to 1,000-1,200 ° C. in a general household stove. As a structure having heat resistance chemical resistance, no oxidation, heat denaturation, chemical modification is found at all, and complete combustion occurs.

Claims (1)

적외선 방사율이 많은 다음 무기질 세라믹스 원료 산화규소 50-56%, 알루미나 20-24%, 산화마그네슘 8-11%, 지르코니아 2-3%, 산화칼슘 1.5-3%, 산화크롬 2-4%, 산화 철 3-4%, 산화코발트 0.5-1%, 산화리튬 1-1.5%, 산화망간 1.5-3%로 되는 무기재료의 미분체를 유기접착제 및 물과 배합하여 소정의 노즐형태로 압축 성형한 성형체를 고온 소결하여 얻어지는 적외선 방사성 세라믹재 버너노즐의 제조방법.Inorganic ceramic raw materials with high infrared emissivity 50-56% silicon oxide, 20-24% alumina, magnesium oxide 8-11%, zirconia 2-3%, calcium oxide 1.5-3%, chromium oxide 2-4%, iron oxide A compact formed by compressing and molding a predetermined nozzle shape by mixing fine powder of an inorganic material consisting of 3-4%, cobalt oxide 0.5-1%, lithium oxide 1-1.5%, and manganese oxide 1.5% with an organic adhesive and water. A method for producing an infrared radioactive ceramic burner nozzle obtained by high temperature sintering.
KR1019880004201A 1988-04-13 1988-04-13 Burner nozzle manufacturing method KR900007258B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100756285B1 (en) * 2007-06-28 2007-09-06 주식회사태평세라믹스 How to make a burner head with increased heat-resisting and strength
KR101122899B1 (en) * 2009-03-16 2012-03-20 권은진 Producing method for a ceramic material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100756285B1 (en) * 2007-06-28 2007-09-06 주식회사태평세라믹스 How to make a burner head with increased heat-resisting and strength
KR101122899B1 (en) * 2009-03-16 2012-03-20 권은진 Producing method for a ceramic material

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Publication number Publication date
KR890016331A (en) 1989-11-28

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