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The current position:The solution > Solutions for Petrochemicals
High temperature heat insulation solution for ceramic fiber lining of methanol conversion furnace
Date:2016/8/28 views:960

Overview of methanol reformer
The factors to be considered in the heat preservation of methanol conversion furnace are furnace type, furnace temperature, heating mode and furnace atmosphere. Furnace type mainly has top burning square box type, side burning double chamber type, small cylinder type, etc. Equipment fuel is generally natural gas plus casting gas, clean, sulfur content is not higher than 50 ppm; The radiant section is operated under micro negative pressure ( - 5 ~ - 10 mmh2o ) and the maximum design temperature of the hot surface is 1260 ℃. Weak reducing flue gas atmosphere in the furnace.

Partition heat insulation structure of methanol conversion furnace
End and side insulation of convection section in methanol conversion furnace;
Lining thickness: 180 - 200 mm
Lining structure: 160 mm 1260 ℃ high purity ceramic fiber module + backing 20 - 40 mm 1260 ℃ grade ordinary ceramic fiber blanket
Anchoring material: s304 stainless steel
End and side upper heat preservation of convection section of methanol conversion furnace;
External insulation thickness: 30 mm
Lining structure: 30 mm 800 ℃ soluble ceramic fiber blanket
Bottom heat preservation of convection section in methanol conversion furnace;
Lining thickness: 180 - 200 mm
Lining structure: 160 mm 1260 ℃ high purity ceramic fiber module + backing 20 - 40 mm 1260 ℃ ordinary ceramic fiber blanket
Methanol conversion furnace outer wall temperature requirements:
Under the design condition that the wind speed is 2.0m / s and the ambient temperature is 25 ℃, the temperature of the outer wall of the furnace shall not exceed the specified temperature except the furnace door and the joint edge: the average temperature of the outer wall of the furnace box body: ≤ 82 ℃.

Refractory fiber lining and construction technology advantages of methanol conversion furnace;

Treatment plan for the interface between furnace wall module and opening:  sealing between furnace tube and lining is always a     difficult point in lining construction. due to the expansion and movement of furnace tube after heating, improper treatment will easily cause fire, heat loss, oxidation and deformation of pipe hanger. Reasonable ceramic fiber module structure can reduce the construction difficulty and form an effective seal between aluminum silicate lining and furnace tube.
② The ceramic fiber module and the furnace tube pressure, because the ceramic fiber compression has a certain elastic resilience, when the furnace tube by thermal expansion and cold contraction can absorb and compensate the gap caused by the volume change of the furnace tube.
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