Mesh belt furnace is a new type of heat treatment equipment, which uses mesh belt to transfer materials and heat treatment in high temperature atmosphere. Mesh belt furnace has the advantages of fast transmission speed, good heat treatment effect and high degree of automation, so it is widely used in steel, non-ferrous metals, ceramics, chemical industry and other industries.

First, the structure of the mesh belt furnace

The mesh belt furnace is mainly composed of heating furnace body, mesh belt conveying device, feeding and discharging device, waste gas treatment device, automatic control system and so on. The heating furnace body is the core part of the mesh belt furnace, which is mainly composed of the furnace body, heater, combustion chamber, fuel supply system, fan, waste gas treatment device, and other parts. The heater can use electric heating, gas heating, oil and gas mixed firing and other forms, according to different heating methods, combustion chambers and fuel supply systems are also different. The waste gas treatment device can be divided into dry treatment and wet treatment, according to different waste gas treatment methods, the height and position of the smoke also need to be adjusted accordingly.

Second, the working principle of the mesh belt furnace

In the mesh belt furnace, the material is sent into the furnace through the mesh belt conveyor and is heat treated in a high temperature atmosphere. The heater inside the furnace heats the air or fuel into the combustion chamber, where it is mixed with the fuel for combustion. After heating up the heater layer by layer, the high-temperature gas generated by combustion enters the furnace body, contacts with the material to be treated and transfers heat to heat it to the required temperature until the heat treatment is completed. After heat treatment, the material is sent out of the oven through the discharge device and the mesh belt conveyor.

Three, mesh furnace process design

The process design of mesh belt furnace needs to consider many factors, such as the physical and chemical characteristics of the material to be treated, heating method, heating time, atmosphere control, etc. In the aspect of furnace temperature control, PID controller and other control equipment can be used to control and adjust the intake air flow, fuel supply and other parameters to maintain the stability of furnace temperature.

For different materials, the mesh belt furnace can use different process routes for heat treatment. For example, for some materials that are easy to evaporate, vacuum heat treatment can be used to connect the heater and the furnace body to reduce the pressure in the furnace to prevent the material from evaporating. For some materials that are easy to adhere, hydrogen atmosphere control technology can be used to reduce the contact time between the material and the mesh belt, and increase the lubricant on the surface of the material

Four, mesh belt furnace automatic control system

The automatic control system of mesh belt furnace is mainly composed of PLC controller touch screen, electrical components, sensors and other parts. The system can realize the automatic adjustment of the heater, combustion chamber, fan, air inlet, temperature and other parameters, and realize the real-time monitoring, alarm and automatic switching of the furnace temperature.

At the same time, the automatic control system can also realize the automatic adjustment of the transfer speed, feed amount and discharge amount of the mesh belt to ensure the efficiency and quality of the material handling in the furnace. In addition, the system can realize remote monitoring and control through the network interface, which is easy to manage and maintain. 

In summary,the mesh belt furnace is a new type of heat treatment equipment, with the advantages of fast transmission speed, good heat treatment effect and high degree of automation. The process design of the mesh belt furnace needs to consider many factors, such as the physical and chemical characteristics of the material to be treated, heating mode, heating time, atmosphere control, etc., and it is necessary to be equipped with an automatic control system to realize the automatic adjustment and monitoring of the parameters of the heater, combustion chamber, feed, discharge, temperature and so on in the furnace, so as to improve the efficiency and quality of heat treatment.

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