SU928154A1 - Drying process automatic control apparatus - Google Patents

Description

(51) DEVICE FOR AUTOMATIC REGULATION OF DRYING PROCESS

I

The invention relates to energy ike, in particular, to automatic pefing of the drying process. . Devices are known for automatically controlling the drying process in a spray booster containing a flue gas temperature sensor and a material flow sensor connected to a fuel consumption regulator, p. entered with the regulatory body of its CO-supply;

However, the known device does not / allows to improve the quality of the drying process of the press powder. | The aim of the invention is to improve. The quality of the drying process is reduced.

The goal is achieved by | that the device additionally contains two temperature sensors installed at different height of the dryer, and an adder, with both sensors connected to the fuel flow controller through the adder.

The drawing shows a diagram of the device for automatic control of the drying process.

To the input of the regulator 1, a waste gas temperature meter 2 and a slip meter 3 are connected. Temperature meters 5 and 6, mounted along the height of the spray dryer, are connected to the inputs of the adder C. Moreover, the outputs of sum 10 torus C and setpoint deviation of the current humidity value of the press powder from the set value 7 are connected to the corresponding inputs of the controller 1, the output of which is connected

15 to the regulator 8, which changes the flow of fuel to the dryer. The device for automatic control of the drying process controls the flow of coolant as follows.

Reducing the temperature of the exhaust gases at the outlet of the spray dryer and the temperature along the height of the dryer leads to a decrease in signals from temperature meters 2, 5 and 6 transmitted through adder 4 to the reg- given banner. Increasing the flow of the slip leads to an increase in the signal from the flow meter of the slip 3, which, in turn, leads to an increase in the signal at the output of the regulator 1 and, consequently, to an increase in the supply of fuel to the dryer using the regulator 8. With increasing humidity of the press powder checked in the laboratory, above a given banner, increases the signal from the setpoint deviator of the current banner of the humidity of the press powder from the setpoint 7 at the input of the controller 1, which leads to an increase in the flow of fuel into the dryer using re 8. Similarly, the fuel supply decreases as the temperature of the exhaust gases increases, the temperature along the height of the dryer and the moisture content of the press powder decreases, and also when the slip flow decreases.

The use of the proposed device allows to significantly reduce the humidity fluctuations of the press powder during transients.

due to the cumulative effect of the drying agent temperature, the temperature of the exhaust gases and the corresponding change in the coolant supply with a change in the technological parameters of the slip, which significantly improves the quality of products at subsequent stages of the technological process.

Claims (1)

1. USSR author's certificate fJ 285616, cl. F 26 v. 25/22, 19 & 6 /