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1.폐열 보일러에서 회수되는 폐열의 종류
The principle of waste heat boiler is that the fuel oil, gas and coal are burned to produce the heat emission of high-temperature flue gas. The high-temperature flue gas first enters the furnace chamber, then enters the waste heat recovery device of the front smoke box, then enters the pyrotechnics pipe, and finally enters the waste heat recovery device of the flue pipe of the back smoke box. The high-temperature flue gas turns into low-temperature flue gas and is discharged into the atmosphere through the stack.
1. High temperature flue gas waste heat: it is a common form, its characteristics are large output, concentrated production point, strong continuity, easy to recover and use, heat absorb accounted for 40~50% of the total heat, the waste heat boiler recovery heat, can be used in production or daily life heat and power generation.
2. Residual heat from high temperature furnace slag,
3. High temperature product waste heat: such as steel billet, high temperature forging part etc,
4. The residual heat of combustible waste gas and liquid waste,
5. Residual heat of chemical reaction,
6. Residual heat of cooling medium,
7. Waste heat from condensation water.
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2.HRSG가 핀 튜브를 사용하는 이유는 무엇입니까?
HRSG에서 핀 튜브를 사용하는 이유 : 폐열 보일러의 효율을 높이려면 연기 온도와 보일러 증기 온도의 온도 차이를 줄여야합니다. 면적, 저항 및 온도 차이 모순이 있습니다. 폐열 보일러의 가열 면적이 증가합니다. 유동 저항 손실을 감소시키기 위해, 유동 면적이 증가 될 수 있고 유속이 감소 될 수있다. 그러나, 저속 흐름은 열전달 효율을 감소시키기 위해 구속된다; 열전달 면적을 증가시키기 위해; 차례로 HRSG의 영역이 무한대로 증가합니다. 나선형 핀 튜브를 사용하면 충분한 열 전달 영역을 보장하고 열 전달을 향상 시키며 연도 가스 저항을 줄일 수 있습니다!
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3.보일러 팁
1. The drum is connected by a riser and a downcomer to form a natural circulation loop.Upper drum is filled with water and steam mixture from circulation loop,normally there will be water steam seperating device and feeding water distribution pipe.In order to improve the quality of boiler water some boilers are also equipped with continuous sewage pipe and dosing pipe. There is a regular sewage discharge device in the lower drum. On the outer wall of the upper boiler drum of steam boiler, there are also flanged short pipes connecting the main steam pipe and the secondary steam pipe and flanges and short pipes connecting the continuous water level gauge, pressure gauge, safety valve and other accessories. There is a regular blowdown device for discharging sediment in the lower boiler drum.
2. For larger capacity boilers, simply using natural separation of steam and water can no longer meet the requirements, need to install a seperating device inside upper drum.
3. The water-cooled wall tube is usually a no.10 or no.20 seamless steel tube with an outer diameter of 51~76mm and a wall thickness of 3.5~6.0mm. The distance between the center of the tube is generally 1.25~2 times of the outer diameter of the tube.Both finned tubes and bare tubes.
4. Water - cooled walls are generally fixed on the upper, the lower can be free expansion.
5. The function of steam superheater is to heat the saturated steam drawn out of the upper drum to a certain temperature of the superheated steam.
Industrial steam is mostly saturated steam, so normally general boiler are not equipped with steam superheater. A steam superheater is installed in the boiler only if the production steam requires a higher temperature and does not require an increase in steam pressure, or if superheated steam is required in order to reduce condensation losses during steam transmission. In industrial boilers, the temperature of superheated steam is 250℃ and 350℃ for the boilers with working pressure of 1.25MPa, and 350℃ for the boilers with working pressure of 1.6MPa.
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4.보일러 기본 지식
보일러는 연료 연소 또는 기타 열 에너지에 의해 방출 된 열 에너지를 사용하여 물 또는 다른 작동 매체를 가열하여 특정 매개 변수 (온도, 압력) 및 품질로 증기 또는 온수를 생성하는 장비를 말합니다. 보일러의 분류 : 적용 : 발전소 보일러, 산업용 보일러 증기 : 초 임계 압 보일러, 아 임계 압 보일러, 초고압 보일러, 고압 보일러, 중압 보일러, 저압 보일러. 증발 용량 : 대규모, 중형, 소형. 매체 : 증기 보일러, 온수 보일러, 유기 열 운반 보일러 열원 : 석탄 연소 보일러, 석유 연소 보일러, 가스 연소 보일러, 폐열 보일러, 전기 보일러. 구조 : 쉘 보일러, 수관 보일러.
최신 가격을 받으시겠습니까? 우리는 가능한 한 빨리 응답 할 것이다 (12 시간 이내에)
