Control system for hood type quenching furnace

Cover quench furnace control system is mainly through the temperature and pressure of the furnace, the gas pipeline flow of each furnace and the flow of flue gas and diluted air volume for conditioning and control, and is equipped with a large gas main quick blocking equipment. The concave and convex of the furnace pressure has a great impact on the use of the heating furnace, cover type quenching furnace pressure high furnace gas will rush out of the furnace body of each seal void to form air erosion, the selection of fiber material sealing furnace door and bottom pressure has a greater impact, at the same time, high mixed airflow around the furnace body and control equipment will also form an impact. When the furnace is low, the cold air is inhaled from the sealed void, in addition to adding the oxidation of the workpiece, it will also make the furnace high temperature is quickly pumped out by negative pressure to form fuel waste. To this end, the flue installation furnace pressure measuring point control electric conditioning smoke gas valve, so that the furnace pressure to maintain a micro positive pressure condition.

The furnace adopts the temperature control in different areas, and each area is equipped with a thermocouple to measure the temperature and enter into a recorder for tracking and recording the temperature in the furnace chamber. Cover type quench furnace safety interlocking system trolley and the safety interlocking of the furnace door, when the furnace door is not opened to a certain position, the trolley will lock in and out, the trolley will lock in and out when the trolley seal is not opened. If the air pressure, gas pressure and compressed air pressure do not meet the specified requirements, the incineration of the burner will not start. If the burner is being incinerated, it will be closed safely.

Cover type quenching furnace set each of the main characteristics of energy saving effect is good: the equipment furnace lining all choose high aluminum refractory fiber, compared with firebrick thermal conductivity coefficient is small, heat capacity is small, so the thickness of the refractory layer is small, and the absorption of heat greatly reduced. This equipment adopts high-speed temperated-burner system, with a high spewing speed up to 100m/s, which can use the gas from the mixing furnace. The furnace temperature is uniform, and the burner system is completely incinerated, so that the fuel can be fully utilized. choose

Zero position control and full sealing technology of furnace pressure, is the biggest combination (the sealing between furnace car and furnace body) in zero position furnace pressure, furnace gas does not leak out, cool air does not leak in, so that the heat energy generated by incineration can be usably used. When using, only 2 trolleys go in and out by turns, which is useful to eliminate the power waste of empty furnace, and the energy-saving effect is very obvious.

High degree of activeness: furnace door, furnace car all choose electric, there is an operation console, the operator can easily operate the furnace door, furnace car operation. The furnace door, the furnace car has the stroke control, to limit the bearing can stop the operation actively, in order to ensure the safety. Incineration system has a full set of incineration, large and small fire operation, detection, flameout alarm, flameout blocking and re-incineration function, and each set of burners have an independent control box, can achieve independent control. The interface of each control box can be connected with the temperature controller in the instrument room, so that the whole system can be actively controlled. Pipeline parameters should be controlled actively. Cover type quenching furnace combustion air and fuel with the pipe pressure can be set and active conditioning, so that the amount of combustion air and fuel control in the best ratio, to ensure a higher incineration power, eliminate the black smoke. Advanced intelligent digital temperature controller is selected for temperature control in the furnace, which is composed of closed loop control with temperature measuring element and automatic control burner. With high precision, high flexibility, anti - interference and high reliability. The temperature control system can take the initiative to calculate, operate, display and store the production process curve of the hot spot, and realize the whole process control. The instrument cabinet is equipped with the operating value of temperature, the operating value of each burner and pipeline parameter, the alarm of abnormal situation and the emergency protection measures to ensure the operation safety.