Do You Know How to Choose Industrial Furnace Insulation Mate

There are many kinds of industrial furnaces. Here is an example of which refractory insulation materials are needed for the cracking furnace lining.

 

The cracking furnace lining has higher requirements on refractory insulation materials, and needs to have the characteristics of good airtight performance and low thermal conductivity. Therefore, the furnace wall of the cracking furnace of the large ethylene cracking device adopts lightweight brick structure in the burner airflow scouring area, and other parts. A refractory fiber and fiber module structure with good thermal insulation properties are used.
 

The refractory insulation materials used are also different due to the different operating conditions of the various parts. The materials applied in the cracking furnace lining can be roughly divided into thermal insulation board, heat preservation refractory brick, refractory brick, ceramic fiber felt, ceramic fiber module, thermal insulation castable, ceramic plate and the like. When the cracking furnace lining is constructed, it can be divided into four parts: radiation chamber, transition section, convection section, flue and chimney according to its structure. The specific configuration of refractory insulation materials for each part is as follows:
 

1, the radiation room

The radiation chamber is a light hydrocarbon heating reaction part of the cracking medium, the furnace temperature is 1260 ° C, and oil and gas burners are arranged on both sides of the wall and the bottom. The refractory insulation materials used in the bottom of the radiant chamber, the side wall/end wall, and the top of the furnace are different.

1) The bottom of the furnace mainly uses thermal insulation boards, thermal insulation refractory bricks, refractory bricks, etc.

2) The side wall/end wall is made of ceramic fiber felt, insulation board, refractory insulation brick, fiber module, hook, hook fixing plate and fiber module anchoring nail.

3) The top of the furnace is mainly made of ceramic fiber felt, fiber module and fiber module anchoring nail.

2. Transition section

The side and end walls are all installed with the radiation chamber wall of the fiber module, and the special-shaped module is installed with the specially designed module; the bottom lining structure is the same as the radiant section bottom. The materials that need to be used are ceramic fiber felts, insulation boards, refractory insulation bricks, fiber modules, and fiber module anchoring nails.
 

3. Convection section

The side wall panel is prefabricated refractory castable on the ground with a thickness of 200mm; the 100mm thick insulation board is used as the backing, the end tube lining has been completed, and the elbow box lining structure is 50mm thick (2 layers 25mm) fiber blanket. The materials used for the side walls are ceramic fiberboard, castables, "Y" anchors, and "V" anchors. Anchors and ceramic fiber mats are required for the elbow box.
 

4, flue, chimney

Chimney and flue: The lining structure is a 50mm thick refractory castable. Anchors and insulation castables are required.

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