What's the difference between gasifier and return air furnace?

Hello everyone ~ Return air furnace and gasifier are two common boiler equipment, so what's the difference between them? I will explain them in detail today. Let everyone choose the appropriate equipment more accurately according to the actual needs and application scenarios when choosing boiler equipment. Let's have a look.

1, the principle is different: gasifier is a kind of combustible gas generated by decomposing wood or particles with high temperature and oxygen, and then the generated gas is transported to the combustion chamber to be mixed with secondary oxygen for combustion, thus achieving the purpose of saving fuel. The return air furnace is directly ignited and burned in the combustion chamber, and then the unburned flue gas is supplemented for a return trip and burned again.

2. Different structure: The gasifier is structurally divided into gasification part and combustion part. The structure of the return air furnace has only one combustion chamber, and a chimney is directly discharged to become a direct-fired furnace. A baffle separates the direct discharge channel, allowing the flue gas to walk a little longer, and then it is discharged from the chimney to become a return air furnace.

Function and principle of gasifier

Gasifier is a kind of furnace that converts solid or liquid fuel into combustible gas. The working principle of gasifier is to decompose fuel by using high temperature and catalyst heating to produce combustible gas. Gasifiers can use various solid or liquid fuels, such as coal, wood, domestic garbage, etc. The main function of gasifier is to convert these fuels into combustible gas for various industrial combustion machinery. Gasifier is widely used in industrial production because of its advantages of convenient use, high efficiency and high energy utilization rate.

Function and principle of return air furnace

Return air furnace is a kind of equipment for recovering waste heat from industrial furnaces. The working principle of the return air furnace is to introduce the waste gas in the furnace into the return air furnace for heat exchange, and recover the waste heat in the heat exchange process and convert it into useful heat energy. The return air furnace can recover the waste heat in industrial production, save energy and reduce environmental pollution.