SU542561A1 - Device for automatic control of hydrocyclone operation - Google Patents

Description

one

The invention relates to devices for automatically controlling the operation of a hydrocyclone.

A device for controlling the operation of the separation apparatus is known, comprising a flotation concentrate sump, a density setting unit and a flotation concentrate density meter, an extremal regulator associated with a coarse sludge flow setting unit and a granulometer of the condensed flotation concentrate 1.

As a prototype, a device is selected for automatic control of the hydrocyclone operation, which contains a sensor and a slurry level regulator in the pump sump, a regulator on the water line to the sump, and an indicator of the boundary size of the pulp particles 2.

A disadvantage of the known device is the low reliability of its operation.

To improve the reliability of the device, the proposed device is equipped with a dividing unit, pulp flow sensors in a hydrocyclone and on a hydrocyclone input to the splitter unit, a pulp pressure sensor in front of the hydrocyclone and a scaling unit connected to it, the output of the dividing unit and the transmitter the boundary size of the pulp particles, the setting device, the sensor and the density regulator of the pulp in the sump, to

2

the input of which is connected to the output of the scaling unit, and the output of the density regulator is connected to the regulator on the water supply line to the sump, and the slurry level regulator in the sump is connected to the regulator installed on the pump bypass line.

The drawing shows a schematic diagram of the device. The device contains a separating unit 1, sensors 2, 3 of the pulp flow rate in the hydrocyclone 4 and on the discharge of the hydrocyclone 4, connected to the input of the separating unit 1, the sensor 5 of the pulp pressure before the hydrocyclone 1 and associated with its scaler 6, to the inputs of which the separating output is connected. unit 1 and unit 7 of the boundary size of the pulp particles, unit 8, sensor 9 and regulator 10 of the pulp density in sump 11, to the input of which the output of the unit is connected

scaling 6, and the output of the density regulator 10 is connected to the regulator 12 on the water supply to the sump 11, and the slurry level controller 13 in the sump II is connected to the level 14 sensor n by the regulator 15 installed in the bypass pump 16.

The device works as follows. Using sensors 2 and 3, respectively, the total pulp flow Qo supplied to the hydrocyclone 4 and the pulp flow Qc per

hydrocyclone discharge 4. The signals of these sensors arrive at the corresponding inputs of the separating device 1, which produces

the signal that is proportional to -,

This signal, as well as the signals of the pulp pressure sensor 5 before the hydrocyclone 4 and the setting device 7 with the logarithmic scale of the boundary particle size, passed the scaling unit 6, comes together with the setting signal 8 on the input of the automatic controller 10 of the pulp density, where they are algebraically summed.

Thus, the cumulative signal of the rpzad task. The pulp density controller 10 is configured according to the following expression:

Rpzad + LR + S-,

where is the specified value of the boundary particle size; P is the pressure of the pulp before the cyclone;

And - the initial task.

This signal is compared with the signal from the pulp density sensor 9 in the sump 11. Depending on the error signal between the predetermined and actual values of the pulp density, the regulator 10 acts on the regulator 12 installed on the water supply line to the sump 11. To stabilize the level pulp in the sump And the level is monitored by the sensor 14. The signal from the sensor 14 is fed to the input

regulator 13 level, which acts on the regulator 15, installed in the bynasnaya line of the pump 16.

QC

Claims (2)

1. The copyright certificate 9 381370, CL B 01D 37/04, 1971. 2. Author's certificate number 194655, cl. In OZS 13/04, G966.