Heating furnace drying issues
Thread Content
The newly built heating furnace (in the north) does not yet meet the conditions for furnace drying; construction is scheduled to begin in May next year. If we do not carry out the drying process now and let it endure the winter, can we carry out the drying process next year?
1. The purpose of furnace drying is to remove the free water and crystalline water contained in the refractory bricks and lining materials within the furnace by raising the temperature gradually, thereby strengthening the material and extending its service life. The furnace testing is conducted to verify whether the steel structure of the furnace, as well as components such as the \"three doors and one plate\" (air doors, fuel valves, and flue dampers), burners, and valves, are installed in a way that ensures smooth and efficient operation ； Test whether the system instruments are easy to use ； Check whether the fuel system is operating effectively. Be thoroughly familiar with the performance and operational requirements of the heating furnaces and air preheater systems used in the equipment. 2. If the furnace is not heated, the lining undergoes cycles of freezing and thawing over the course of a winter, causing the entire lining to crumble. The furnace must be baked
If it is allowed to air-dry long enough, there is no problem leaving it unheated. You should be fine with a natural drying time during the summer. Buildings in the north (even those without heating) do not turn pink over the winter. However, the time mentioned above is an uncertain amount; as a precaution, it is best to heat the natural water to 150 degrees and ensure that it is heated evenly and thoroughly. Personal opinions are for reference only!
It is necessary to keep it warm to prevent freezing; it will be troublesome if the casting material freezes
The furnace must be dried; in principle, the sooner it is dried after the pouring material is prepared, the better, especially in the north
It’s September 28th, and in the north temperatures will drop below zero in about 20 days; there’s simply not enough time for natural drying. The furnace isn’t ours, so we can’t be responsible for it ourselves – we must follow the requirements strictly. There is no such thing as luck
It must be dried; temporary facilities can be used for this purpose, and no connection with the main equipment is required – it’s fine to use a separate drying oven
The furnace must be heated; if such conditions are not available, charcoal fire must be placed inside the furnace to maintain a temperature of over 4°C
My personal opinion is the same as that on floor 3: bake it at 200°C, then stop and bake it again next year; otherwise, poor temperature control can have an impact on the furnace tubes.
Use temporary wiring and steam for the process; the treatment time needs to be long enough so that there are no problems during the winter. The quality of the work should be checked after the furnace is dried, and the manufacturer should conduct inspections together with you
Hydrocracking at Dushanzi was not carried out with strict furnace drying, for the following reasons: 1. The conditions were not available. 2. The special weather conditions in Xinjiang. 3. The heating furnace lining manufacturer agrees. 4. Pass the freezing test; 5. Use electrical equipment for simple furnace drying