SU1286236A1 - Automatic control system for liquid filter - Google Patents

Abstract

The invention of the OTUJCHTCH to an automatic control system for a liquid filter can be used in the oil industry and can improve the quality of cleaning of oil-containing water. The automatic control system (SAR) contains a water flow control loop with correction for the water content in the liquid filter 2 by the effect on the oil output (the flow sensor 6 associated with the input of the flow regulator 9, the moisture meter 8 connected via the regulator 10 with another regulator input torus 9 connected to valve 11). 1 il. (L N3 00 O5 oo 05

Description

The invention relates to a system for automatically controlling liquid filters and can be used in the oil industry in the separation of oil from water.

The purpose of the invention is to improve the quality of purification of oily water.

The drawing shows a schematic diagram of an automatic liquid filter control system.

The automatic control system contains a tank 1, the upper part of which is filled with oil, forming its liquid filter 2, the pipeline 3 supplying purified water, the pipeline 4 purified water and the pipeline 5 extraction of oil.

The pipeline 3 has a sensor 6 for the flow of purified water passing through the sensing element 7, and a moisture meter 8 is installed in the liquid filter 2. The output of the sensor 6 for the flow 6 is connected to the first input of the first regulator 9, the second input of which is connected to the output of the second regulator 10, the inlet of which is connected to the outlet of the moisture meter 8. The outlet of the first regulator 9 is connected to the actuating mechanism 1 of the oil recovery pipeline 5.

The automatic control system works as follows.

Oily water enters through the sensitive element 7 of the flow sensor 6 through conduit 3 into the upper part of the tank 1, inside of which the liquid filter 2 is located. The water is cleaned by passing it through the liquid filter 2.

The moisture meter 8 determines the water content in the liquid filter 2. Its corresponding signal is fed to the input of the second regulator 10. The output signal of the second regulator 10 is the reference for the first regulator 9, to the first input of which the signal from the flow sensor 6 is received for cleaning water. The output signal of the first regulator 9 acts on the actuator 1 1 installed on the pipeline 5 oil extraction from the installation.

The state of the liquid filter 2 is determined, 1 is the water content in it. The optimum ox content in the liquid filter 2 is determined by the quality requirements for the prepared oil and water. When the water content in the liquid filter 2 deviates from the optimal second controller 10, it generates a reference correction signal to the first controller 9, which regulates the operation of the liquid filter 2 so as to ensure the specified water content in it.

During normal operation of the liquid filter 2, the volume of water contained in it corresponds to the volume of water entering the purification system. During the operation of the tank 1, small dispersed water and mechanical particles accumulate in the bottom of the liquid filter 2. With their significant content, they are included in the composition of purified water, which reduces the quality of its purification. Their volume is defined as the difference in the volume of water that must be contained in the liquid filter 2 at a given water capacity with the actual volume of water contained in the liquid filter 2.

The amount of water to be contained in the liquid filter 2 is determined by the formula

Y ,, Ji

U.F.

CH)

where QB is the capacity capacity by

water, m / h;

Nf.f. - height of the liquid filter, m (set by the design of the apparatus);

.F.- filtration rate, i.e. the rate of passage of water through

the liquid filter, m / h, is calculated according to the Stokes law and is constant for each type of oil. If the actual volume of water contained in the liquid filter 2 is less than the estimated volume of water for a given capacity, the signal of the moisture meter 8 through regulators 9 and 10 is fed to the actuator 11, which increases the flow area of the valve, thereby increasing the oil output from the tank 1 .

The excess of the actual volume Vii2 over the calculated content of 1; water Uch indicates the accumulation in the filter of dispersed water and mechanical impurities that increase its specific

weight. At the same time, the signal of moisture meter 8 through the regulators 9 and 10 is fed to the actuator 11. which reduces the flow area of the valve, closing the oil outlet from the tank.

The second controller 10 realizes the dependence

  axj f- b.

where Y is the signal for adjusting the oil discharge from the liquid filter; X - signal of moisture content of the liquid filter;

a is the coefficient for adjusting the reference signal by the value of the moisture content of the liquid filter; b - calibration factor. The first regulator 9 implements the dependence

for VcT, the control signal to the actuator of the oil withdrawal pipeline;

previous value of this signal; signal from the sensor flow of incoming water.

1286236

Claims (1)

The claims of neither the quality of purification of an oil-containing automatic control system, the system additionally contain a wet-flow filter containing a sensor-meter installed in a liquid filter the flow rate of the purified water, the installed second regulator, while the output of the water supply filter to the filter, and the first flow rate is connected to the first input of the primary controller to the actuator, the main regulator, and the output of the moisture meter installed on the pipeline selection of the nev through the second regulator with the second input ti, characterized in that, for the purpose of a higher-first controller.