KR900005280B1 - Anticorrosion hot water heater - Google Patents

Anticorrosion hot water heater Download PDF

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KR900005280B1
KR900005280B1 KR1019860005518A KR860005518A KR900005280B1 KR 900005280 B1 KR900005280 B1 KR 900005280B1 KR 1019860005518 A KR1019860005518 A KR 1019860005518A KR 860005518 A KR860005518 A KR 860005518A KR 900005280 B1 KR900005280 B1 KR 900005280B1
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South Korea
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hot water
water tank
acid
wall
boiler
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KR1019860005518A
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Korean (ko)
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KR880001985A (en
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최병혁
정헌생
심건주
양준환
한문희
홍기석
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한국동력자원 연구소
박긍식
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/24—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Details Of Fluid Heaters (AREA)

Abstract

boiler has a thin enameled coating on the wall of hot water tank or chimney for the domestic coal fired boiler in order to protect low temperature corrosion from acidic solution. Acidresisting and heat- resisting coating material comprising Na2O:9.8, K2O:2.5, Li2O:4.0, CaO:1.5, BaO:0.2 part etc., is coated on steel plate (2) of hot water tank (1) or wall steel-plate (4) of chimney (3).

Description

온수통 표면과 연도내벽에 내산내열 코팅재가 피막된 내부식성 온수 보일러Corrosion-resistant hot water boiler with acid-resistant heat-resistant coating on the surface of the hot water tank and the inner wall of the flue

제1도는 본 발명의 실시예를 나타내는 구조 단면도.1 is a structural cross-sectional view showing an embodiment of the present invention.

제2도는 본 발명의 온수통의 일부절개 구조 사시도.Figure 2 is a perspective view of a partially cut structure of the hot water tank of the present invention.

제3도는 본 발명의 요부 확대 단면도.3 is an enlarged cross-sectional view of the main portion of the present invention.

본 발명은 가정용 연탄 온수 보일러에서 온수통 표면 및 보일러 연도 내벽에 산성수용액으로 인한 저온부식 발생을 방지하고자 기존의 온수통표면 및 연도내부에 내산 법랑을 얇게 코팅하여 만든 내부식성 보일러를 제공함에 있다. 저온부식이란 연탄중에 함유되어 있는 유황분이 연소할 때 SOX를 포함한 연소가스를 발생하고 이 SOx가 온수통과 접촉하여 그 온도가 로점(dew point) 이하로 되면 연소가스중의 수증기와 작용하여 산성수용액(H2SO4)를 형성하는 이 보일러 내부의 강판, 특히 온수통 표면에 응축하여 부식을 발생시키는 것이다. 연탄이 연소통내에서 연소할 때는 그 온도가 상온부터 700℃ 정도까지 변화하지만 온수통 내부에 물이 순환되고 있음으로 온수통 표면의 온도는 상온부터 약 350℃까지 변화한다. 따라서 이 표면에서는 연소가스가 웅축하여 산성수용액을 형성하게 되고 이것은 강재를 부식시키는 가장 큰 원인이 되고 있다.The present invention is to provide a corrosion-resistant boiler made by coating a thin coating of acid enamel on the surface of the existing hot water tank and inside the flue in order to prevent the low temperature corrosion caused by the acidic aqueous solution on the hot water tank surface and the inner wall of the boiler flue in domestic briquette hot water boiler. Low-temperature corrosion is to when the combustion the sulfur content contained in the briquettes and generate a combustion gas containing SO X and the SO x is acting as water vapor in the combustion gas when its temperature comes into contact passes through the hot water below the dew point (dew point) acid Condensation occurs on the steel plate inside the boiler, especially the hot water tank surface, which forms an aqueous solution (H 2 SO 4 ). When briquettes are burned in a combustion tank, the temperature varies from room temperature to about 700 ° C, but the temperature of the surface of the hot water tank varies from room temperature to about 350 ° C because water is circulated inside the hot water tank. Therefore, the combustion gas expands on this surface to form an acidic aqueous solution, which is the biggest cause of corrosion of steel.

이러한 산성수용액의 저온부식을 방지하기 위하여는 밀착성, 내산성, 내열충격성, 내마모성 등이 좋은 내산법랑을 금속 소지에 코팅하여 사용 하면되나 일반적으로 사용되는 보통법랑은 내산성이 없고 내열충격성이 약하기 때문에 장기적으로 사용할 수 없는 것이다. 이하 발명의 요지를 도면과 실시예에 연관시켜 설명하면 다음과 같다. 먼저 내부식 보일러의 제조법으로서 다음과 같은 공정을 거친다.In order to prevent low temperature corrosion of the acidic aqueous solution, acid enamel having good adhesion, acid resistance, thermal shock resistance, and abrasion resistance may be coated on a metal base, but generally used enamel is not acid resistant and has a low thermal shock resistance. It cannot be used. Hereinafter, the gist of the present invention will be described with reference to the accompanying drawings and examples. First, as a method of manufacturing an internal boiler, the following process is performed.

Figure kpo00001
Figure kpo00001

상기 시유공정에서 사용되는 내산법랑유약의 산화물의 실시예는 다음과 같다. 중량비 Na2O : 9.8, K2O : 2.5, Li2O : 4.0, CaO : 1.5, BaO : 0.2, NiO : 0.2, CaO: 1.1, F2: 1.2, SiO2: 64.5, A2O3: 0.5. B2O3: 10.5, Sncl2: 0.4/100, TiO2: 3.8, MnO2: 0.2.Examples of the oxide of the acid-proof enamel glaze used in the milking process are as follows. Weight ratio Na 2 O: 9.8, K 2 O: 2.5, Li 2 O: 4.0, CaO: 1.5, BaO: 0.2, NiO: 0.2, CaO: 1.1, F 2 : 1.2, SiO 2 : 64.5, A 2 O 3 : 0.5. B 2 O 3 : 10.5, Sncl 2 : 0.4 / 100, TiO 2 : 3.8, MnO 2 : 0.2.

특히 제1-3도와 같이 온수통(1)의 표면 철관(2)과 연도(3)의 내벽철판(4)에만 본 발명에 의한 내산 내열코팅재(5)로 평균두께 200㎛ 정도 피막함으로서 내산성, 밀착성, 내열충격성, 내마모성, 열팽창계수가 향상되는데 보통법랑과 내산법랑과의 특성비교는 다음과 같다.In particular, as shown in Fig. 1-3, only the surface iron pipe 2 of the hot water tank 1 and the inner wall iron plate 4 of the flue 3 were coated with an acid-resistant heat-resistant coating material 5 according to the present invention with an average thickness of about 200 μm, so that the acid resistance, Adhesion, thermal shock resistance, abrasion resistance, and coefficient of thermal expansion are improved. The characteristics comparison between normal enamel and acid enamel is as follows.

Figure kpo00002
Figure kpo00002

상기표에서 보는 바와 같이 실시예의 내산법랑을 일반적으로 사용되는 보통법랑에 비하여 그 내산성과 내열충격성이 크게 뛰어남을 알 수 있다.As shown in the above table, it can be seen that the acid enamel of the embodiment is significantly superior in acid resistance and thermal shock resistance as compared with a common enamel commonly used.

이러한 내산법랑으로서 가정용 연탄온수보일러의 온수통 및 연도내벽에 코팅처리 함으로서 저온 부식 방지를 기하여 기존보일러의 짧은 수명을 훨씬 연장하여 물자 절감에 의한 에너지 절약을 기대할 수 있다.As such acid-resistant enamel, the coating process is applied to the hot water tank and the flue inner wall of the domestic briquette hot water boiler to prevent low temperature corrosion, which can extend the short life of the existing boilers, and thus can save energy by saving materials.

즉, 현재 사용되고 있는 가정용 온수 보일러의 수명은 약 3년으로 보고 있으나, 내산법랑 코팅 온수통을 사용하면 수배 이상은 사용할 수 있는 효과가 발생하는 것이다.In other words, the lifetime of the currently used domestic hot water boiler is reported to be about three years, but if the acid-resistant enamel coated hot water tank is used, the effect can be used more than several times.

Claims (1)

온수통(1)의 표면 철판(2)과 연도(3)의 내벽철판(4)에만 Na20 : 9.8, K2O : 2.5, Li2O : 4.0, CaO : 1.5, BaO : 0.2, NiO : 0.2, CoO : 1.1, F2: 1.2, SiO2: 64.5, A12O3: 0.5, B2O3: 10.5, SnCl2: 0.4/100, TiO2: 3.8, MnO2: 0.2로 조성된 내산 내열 코팅재(5)를 200㎛ 정도 법랑공정에 의해 피막되게 하여 제조되게 함을 특징으로 하는 온수통표면과 연도내벽에 내산 내열 로팅재가 피막된 내부식성 온수 보일러.Only on the surface iron plate 2 of the hot water tank 1 and the inner wall iron plate 4 of the flue 3 Na 2 0: 9.8, K 2 O: 2.5, Li 2 O: 4.0, CaO: 1.5, BaO: 0.2, NiO : 0.2, CoO: 1.1, F 2 : 1.2, SiO 2 : 64.5, A1 2 O 3 : 0.5, B 2 O 3 : 10.5, SnCl 2 : 0.4 / 100, TiO 2 : 3.8, MnO 2 : 0.2 A corrosion resistant hot water boiler having an acid resistant heat resistant coating material coated on a surface of a hot water tank and an inner wall of a flue, characterized in that the acid resistant heat resistant coating material (5) is coated by a 200 μm enamel process.
KR1019860005518A 1986-07-09 1986-07-09 Anticorrosion hot water heater KR900005280B1 (en)

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