SU364818A1 - LIBRARY - Google Patents

Description

one

The invention can be used in the construction ceramics industry.

There is a known method for automatically controlling thermal conditions in a slit furnace by supplying coolant to the heating and firing zones and supplying a cooling agent to the boundary of the firing and cooling zones.

However, this method does not provide the necessary accuracy of maintaining the mode in the furnace.

The purpose of the invention is to improve the performance of the process in any "disturbances.

This is achieved by adjusting the coolant supply by the temperature at the beginning of the preheating zone.

The invention is illustrated in the drawing.

Temperature control in the heating zone L of the furnace is carried out using a thermocouple signal from which is fed to the regulating device 2.

As the temperature increases, the regulator 4 and the regulator 5 act on the regulator through the trigger 3. Thus, the gas supply to the preheating zone is reduced, and the temperature returns to normal.

When the temperature decreases, the gas supply to the preheating zone is increased and the temperature returns to its previous value. Similarly, the regulation is carried out.

The temperature in zone B of firing from thermocouple 6 through regulator 7, starting device 8, actuator 9 and regulator 10 changed gas supply B to this zone.

During a break in the supply of the products to be calcined, the temperature to the zone of calcination, measured by the thermocouple 6, decreases sharply and the increase in the gas supply does not bring the temperature to the desired value. In this case, additional exposure is necessary by reducing the supply of cold air to the OZG roziad roasting and cooling (zone B). Since it is not possible under the conditions of a slot-type roller furnace to signal the cessation of the supply of products to the burning zone using conventional techniques, the effect of increasing the temperature at the beginning of the preheating zone after the break in the supply of products is used for this purpose. In this case, the temperature measured by thermocouple 11 gradually rises and by the time when the supply of products to the firing zone stops, reaches a certain value.

At this moment, the supply of cold air to the boundary of the burning and cooling zones is reduced by means of the controller 12, the starter 13, the actuator 14 and the regulator 15.

When simultaneously exposed to the flow of cold air, the temperature measured by thermocouple 6 will return to the specified value. This prevents the possibility of rejection after the resumption of movement along the conveyor of the products to be baked.

Subject invention

A method of automatically controlling the thermal condition in a slit furnace by supplying coolant to the heating zones, firing and supplying a cooling agent to the boundary of the burning and cooling zones, characterized in that, in order to improve the performance of the process during any "disturbances in the furnace, the flow of the cooling agent is adjusted by temperature at the beginning of the preheating zone.

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