1.2.1 The use of industrial boilers
1. Provide the required heat energy for the production process of petroleum, chemical, textile, printing and dyeing, papermaking, pharmaceutical and other industrial sectors.
2. It is used in many aspects of people's life such as heating, food processing, sanitation and disinfection.
3. Recycle the waste (waste) heat in the production process of the industrial sector.
1.2.2
Industrial boilers are commonly used equipment in industrial production. Practice has proved that it is a special equipment with a relatively high accident rate and serious accident hazards. Its characteristics are mainly manifested in: accident-prone, strong destructive power, and great harm. 1.1.2.1 The particularity of industrial boilers
Compared with other equipment, boiler equipment has the following particularities:
1. The danger of explosion
Boiler equipment is generally equipment that bears pressure loads (except for atmospheric hot water boilers). If the pressure in the pot rises during operation and exceeds the allowable working pressure, but the safety accessories fail, and the alarm and exhaust pressure are not timely, and when the pressure is greater than the limit pressure that the pressure components can withstand, an explosion will occur. Or under normal working pressure, due to defects (corrosion, wear, creep, fatigue failure, etc.) leakage, or even explosion. When the boiler explodes, the pressure inside the boiler suddenly drops, and the high-temperature saturated water in the boiler leaks and vaporizes, and its volume expands hundreds of times, forming a huge shock wave, causing the furnace body to fly out and destroy the building, which will give national property and people causing serious damage and casualties.
2 indestructible
Since the heating surface of the boiler has been working under high temperature conditions for a long time, and is also eroded by fire, flue gas, ash, water, steam, scale, etc., the pressure components of the boiler are corroded, and the fly ash in the flue gas is washed and worn. Changes in load and combustion occur thermal expansion and contraction, resulting in fatigue damage and creep cracks. At the same time, due to lack of water, scaling or water circulation damage, the heat transfer of the boiler will be hindered, causing the heating surface in the high temperature area to burn out, drum marks, cracks, etc. Therefore, boiler equipment operates under harsh conditions and is more prone to damage than general mechanical equipment.