How to choose the type of high-temperature muffle furnace?

The furnace type of high temperature muffle furnace should be selected according to the size of the heat load, the nature of the heated medium and the operating cycle and other process operation requirements, according to the principle of convenient installation and maintenance, low investment, and combined with site conditions and hot spots of the waste heat recovery system. In general, the selection of high temperature muffle furnace must meet the following requirements:

1. When the design load is less than 1MW, the pure radiant high-temperature muffle furnace should be selected, and the pure radiant cylindrical furnace should be preferred. When the high-temperature muffle furnace group shares a combined waste heat recovery system and a reformer heating furnace is required, this is not necessary.

2.When the design load is 1~30MW, the radiant convection cylindrical furnace should be selected first. When the design load is greater than 30MW, it is necessary to select a cylindrical furnace, box furnace, vertical furnace or other furnace types with tubes in the middle of the furnace through technical and economic comparison.

3. If the heated medium is heavy, the gasification rate is high, it is easy to coke, or there are special process requirements, you should choose a horizontal tube vertical furnace. If the heated medium is easy to pull out crystals, or if it contains solid substances, you should choose Spiral tube cylinder furnace.

4. The furnace tube is expensive and requires the surface utilization of the furnace tube, or when it is required to reduce the heating area and shorten the process length to reduce the pressure drop, the furnace type with single-row tube and double-sided radiation should be selected.

5. When the heated medium uses the gas phase as the continuous phase, the volume flow is large, and the pressure drop is required to be small, it is suitable to choose the manifold vertical tube type, U-shaped, inverted U-shaped or ∏-shaped coil structure box furnace, small load It is also possible to use a riser cylinder furnace where the coil is connected to the manifold.

6. When the heated medium has a chemical reaction, the temperature field in the furnace should be compatible with the chemical reaction process in the tube, and a box furnace with a single-row tube and double-sided radiation should be selected.