Boiler Operation Safety and Cautions 1. The fireman must be on duty with a certificate, and the boilers, safety valves and pressure gauges shall be reported (sent) for inspection once a year. 2. The steam pressure basically meets the design requirements or the standards approved by the labor department. 3. There is no serious corrosion in the shell, hearth, gallbladder and tube parts, and the furnace wall is completely sealed, well insulated and smokeless. 4. Drive and water supply system is reliable, one boiler is equipped with two water supply pumps, which are used once a week. 5. Boilers must operate under negative pressure. 6. Various control valves have complete devices and reliable movements. 7. Rinse the water level gauge once every shift. Wear protective gloves when rinsing. Don't correct the water level gauge on your face. 8. Flush the pressure gauge once per shift, and flush the water storage elbow of the pressure gauge to prevent fouling and clogging. 9. Sewerage is discharged twice per shift. Sewerage is selected at high water level and low load. 10. Test the safety valve manually at least once a week.When the pressure rises to the supply pressure, two safety valves are manually operated to exhaust steam once.Pressure boost operation relief valve automatic exhaust once a month. 11. The leakage of water and steam from manholes, hand holes and observation holes of boilers should be tightened in time and replaced if the damage is serious.Boiler water temperature should be lowered below 60 degrees during replacement. 12. Boilers should be equipped with water treatment devices, water quality checked once per shift test paper, sampled once a week to the quality control department, water quality standard data: total hardness of feed water < 0.03 PH < 7, total alkalinity of boiler water 6-12 PH value 10-12 chloride < 44.5. 13. Causes of Boiler Explosion: 1) Overpressure: The stress of the compressed component exceeds the strength limit and breaks down. 2) Overtemperature: When the material of the compressed component exceeds its allowable operating temperature, the strength decreases or the water shortage becomes serious, it will crack. 3) Wear and corrosion: wear makes material thinner and reduces its bearing capacity; corrosion makes steel plate brittle. 4) Cracks: Frequent start-up and shutdown of boilers or frequent fluctuations of pressure and load, resulting in fatigue cracking. The main (problems reasons of boilers are congenital themselves) defects and poor operation management (incomplete and ineffective safety accessories, illegal operation and unauthorized leave of posts, diseased operation of equipment, failure to detect cracks and corrosion in time, failure of water treatment facilities or water treatment facilities, etc.). 14. Boiler explosion prevention measures: 1) Prevent overpressure (regular manual and automatic sewage discharge, prevent the safety valve from rusting; regularly flush the water storage elbow under the pressure gauge; and regularly do the water pressure test for the equipment that has been out of service for a long time). 2) Preventing overheating (preventing water shortage and scaling). 3) Prevention of corrosion (water treatment up to the standard to ensure the quality of water supply and furnace water, strengthen furnace shutdown maintenance, timely removal of soot). 4) Prevent cracking and grooving (combustion stability, no sudden cooling and sudden heating). 5) Eliminate congenital defects (strictly check and accept new boilers and boilers after maintenance).
Boiler Operation Safety and Cautions
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Uploaded by admin on 2019-10-15 11:56:08