SU742689A1 - Method of automatic regulation of heat condition in slot-type furnace - Google Patents

Description

The invention relates to the production of ceramic products and can be used in the construction ceramics industry.

A known method is to supply the coolant in the heating zone, firing and supplying a cooling agent to the boundary of the firing and cooling zones, and the supply of the cooling agent is adjusted by temperature at the beginning of the heating zone [1].

Yu

However, the known method can not ensure the stability of the temperature of the furnace height in the burning zone, since the breaks in the conveyor stops supplying the tiles must be submitted on the ability boosted _{signals? 5} shenie coolant supply adjustment zone. Otherwise, the temperature gradient along the height of this zone is significantly different from the set one. This leads to the fact that, passing through the zone and its products are deformed, and hence, _Μ reduced quality of finished products.

The purpose of the invention is the stabilization of the temperature of the medium along the height of the furnace in the firing zone and improving the quality of finished products.

This is achieved by the fact that in the method of automatically controlling the thermal regime in a slit furnace by supplying a coolant under the product to the heating and firing zones according to the deviation of the temperature regime from the predetermined one and supplying a cooling agent to the cooling zone, the coolant and cooling agent are additionally supplied to the firing zone above products on the deviation of the temperature of the medium above the products in this aeon from the set value and on the rate of change of the temperature of the medium under the products, and the cooling agent in this zone served in the case of reducing the flow of coolant over the products to a minimum.

The method is as follows.

Ceramic products move sequentially through the firing and cooling heating zones. The required temperature of the medium along the length of the furnace is maintained by regulating the flow of coolant under the product, and the temperature gradient along the height of the furnace in the firing zone by additional supply of coolant and cooling agent over the products. The flow rate of the coolant under the product is regulated when the temperature of the medium deviates along the length of the mesh from the required values.

An increase in the temperature of the medium above the products in the firing zone leads to the fact that the difference between the measured and the required values becomes greater than zero.

Under the influence of this difference, the flow of coolant over the products is reduced. If, when the coolant supply is reduced to a minimum value of _10, the temperature difference does not decrease to zero, then the coolant supply is turned on, and the temperature of the medium above the products decreases to the required value. Similarly, the flow rate of the coolant and the cooling agent is regulated with an increase in the temperature of the medium under the products at the rate of its change.

Thus, through the use of an additional supply of coolant and coolant- ²⁰ agent to the firing zone over the products and controlling the magnitude of these costs by deviating the temperature of the medium above the products from the set value and by the rate of change of the temperature of the medium along the height of the furnace in the firing zone, the quality of the finished products increases.

Claims (1)

37, the heat transfer media for the products are adjusted when the temperature of the medium along the length of the lake deviates from the required values. The increase in the temperature of the medium over the products in the area of the flow of the drift valve to the fact that the difference between the measured and required values becomes greater than zero. Under the slash, this difference reduces the flow of body over the products. If op decreases the coolant supply to the minimum value and the temperature difference decreases to mud, IO turns on the cooling agent flow, and the temperature of the medium above the products decreases to the desired value. Similarly, the flow rate of the coolant and the cooling agent is controlled when the temperature of the medium under the products increases in terms of the speed of its change. Thus, by using an additional supply of coolant and cooling agent to the burning zone above the products and controlling the magnitude of these costs for the deviation of the medium temperature over the products from the specified value and for the rate of temperature change of the medium along the furnace height in the burning zone, the quality of the finished products. Claims The method of automatic regulation of feroio mode in a slit furnace by feeding the substrate under the product to the heating and firing zones according to the deviation of the temperature from the set point and the flow of the cooling agent to the cooling zone, characterized in that in order to stabilize the medium temperature along the height of the furnace in the burning zone and improving the quality of the finished products, in addition, the supply of the heat medium and the cooling agent to the burning zone over the products is carried out according to the deviation of the medium temperature over the products into this zone from the predetermined value and the rate of change in the temperature of the medium under the products, and the cooling agent is supplied to this zone if the flow of coolant over the products is reduced to a minimum. Sources of information taken into account in the examination of the USSR Copyright Certificate N 364818, cl. F 27 B 9/40, 1974.