Ask about boiler steam temperature
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This post was last edited by Xiangjiang Guest on 2009-8-14 10:01. What is the reason why the steam temperature of the steam boiler exceeds the standard range? What are the adverse consequences? Thanks!
Are you talking about superheated steam? Saturated steam is only related to pressure.
If the boiler furnace load is too large or the boiler design is unreasonable, the temperature may exceed the rated range. The boiler's superheated forging, evaporation section, economizer section, etc. have certain load distribution ratios. The heat exchange area of the superheater section is too large and can easily exceed the standard. The undesirable consequence is the safe operation of the boiler. The design and material selection of pressure vessels are based on certain design temperature and design pressure conditions. If the conditions change, there is a possibility that the original design conditions will be exceeded, and there will be safety hazards in the safe operation of the boiler. Therefore, the boiler must be designed with temperature and pressure alarms.
Thanks! Worthy of being an energy expert!
The analysis on the 3rd floor was very thorough and I learned* study *
The boiler structure is unreasonable, the furnace volume heat load is too large, the fuel quantity is not well controlled, etc. will have an impact. Excessive steam temperature will reduce the safety of the materials used in steam equipment, and creep will occur over time.
In terms of operation, 1. The furnace load is too large and the furnace temperature rises. The boiler evaporation amount should be appropriately reduced. 2. The upper primary air output is large and the powder feeder rotates at a high speed. The lower primary air output is small and the powder feeder rotates at a low speed, causing the flame center to move upward and the furnace temperature to rise. 3. The flame center moves upward due to unreasonable burner inclination. 4. The flame center moves upward due to air leakage in the lower part of the furnace. 5. Wind Excessive volume causes high smoke velocity, and the heat transfer on the convection heating surface is enhanced. 6. Air leakage in the milling process, too much air volume, and high smoke velocity. 7. Feed water temperature is too low. 8. Unreasonable use of desuperheating water, or desuperheating water pipes are blocked. 9. Too much saturated steam consumption, such as excessive sewage discharge, results in too little steam in the superheated tube. 10. Steam pressure is too high. 11. Inaccurate temperature display, instrument problems.
There are many reasons for over-temperature, such as too much fuel, poor water control, over-temperature, scaling and coking on the heating surface.