SU1059554A1 - Device for covering component flows when mixing - Google Patents

Abstract

A DEVICE FOR REGULATING THE COSTS OF COMPONENTS DURING A MIXTURE, containing a series-connected comparison unit, an integrator and a pulse generator, n channels, respectively, the number of components to be mixed, each of which contains a component flow sensor, a reversible counter and a component flow regulator, as well as a switch, setting unit and unit selection of the maximum signal, the inputs of which are connected to the outputs of the respective component flow controllers, characterized in that, in order to enable In the event of a continuous change in their quality, it contains a total flow sensor, a switching unit, a component flow sensor connected in series with a maximum quality indicator, an additional reversible counter and a component flow controller with a maximum quality indicator, a serially connected mixture quality analyzer and a controller component consumption with a minimum quality indicator, with the output of the total consumption sensor being connected to the setpoint input, outputs which are connected to the corresponding first inputs of reversible meters, the second inputs connected to the outputs of the respective component flow sensors, and the outputs to the inputs of the corresponding component flow controllers, the output of the maximum signal selection unit is connected to the first input of the switch, the second input of which is connected to the output of component consumption with a minimum quality indicator, the third input is with the output of the switching unit, the output is with the input of the comparison unit, and the SP is the input of the commutator unit and associated with a ate ate output quality analyzer mixture pulse generator output is connected to the second input of the additional up-down counter.

Description

The invention relates to a technique for automatic control of the mixing process and can be used in the chemical and petrochemical industries.

A known system for regulating the ratios of parameters for technological processes, comprising a comparator unit, a setpoint adjuster, flow rate controllers, and an actuator 1.

The closest to the present invention is a device for controlling the flow rates of components when mixing, comprising a series-connected comparison unit, an integrator and a pulse generator, n channels, respectively, the number of components being mixed, each of which contains a component flow sensor, a reversible counter and a component flow controller, as well as a switch, a setpoint adjuster and a maximum signal selection unit whose inputs are connected to the outputs of the corresponding component 2 flow controllers.

The disadvantage of these devices is the impossibility of their use to obtain a mixture of a given quality in the case of a continuous change in the quality of the components.

The purpose of the invention is to make it possible to control the costs of components in the event of a continuous change in their qualities.

The goal is achieved in that the device contains a total flow sensor, a switching unit, a serially connected component flow sensor with a maximum quality indicator, an additional reversible counter and a component flow controller with a maximum quality indicator, sequentially, connected a mixture quality analyzer and a component flow controller with the minimum quality indicator, and the output of the total flow sensor is connected to the setpoint input, the outputs of which are connected to the corresponding The first inputs of the reversible meters, the second inputs connected to the outputs of the respective component flow sensors, and the outputs to the inputs of the corresponding component flow controllers, the output of the maximum and maximum signal selector unit is connected to the first input of the switch, the second input of which is connected to the controller output. the flow rate of the component with the minimum quality indicator, the third input is with the output of the switching unit, the output is with the input of the comparison unit, and the input of the switching unit is connected with the output of the quality analyzer with esi, pulse generator output

connected to the second input of an additional reversible counter.

The drawing shows the principal (on the scheme of the proposed device.

The device contains a component flow sensor 1 with a maximum quality indicator connected to one of the inputs of the additional reversible counter 2, the other input of which is connected to the output of the generator of 3 pulses, the input of which is connected to the output of the integrator 4, the output of the counter 2 is connected through the controller 5 consumption of the component with the maximum quality indicator with the actuator 6. A mixture quality analyzer 7 is installed on the commodity product flow, the output of which is connected through the switching unit 8, the switch 9 and the block 10 Neny to the input of the integrator 4, the analyzer output is also connected directly to the inlet flow regulator component 11 with a minimum quality indicator whose output is connected to the actuator 12 and through switch 9. - to the input of comparator unit 10. The total flow sensor 13 is connected to a setting device 14, the output of which is connected to the first inputs of the reversible meters 15, the second inputs of which are connected to the sensors 16 of the component flow, and the outputs to the flow regulators 17 of the components whose outputs are connected to the block 18 for selecting the maximum signal and with appropriate actuators 19. The output of the maximum signal selection unit 18 is connected to the switch 9. The mixture quality analyzer is located on the mixing manifold 20.

The device works as follows.

In the initial state, the actuators are closed, the components are not supplied to the mixture, since the reference voltage is removed, signals from the regulators are not received. After setting the specified ratios for i components (i 3, 4, ..., ti) using reference setter 14, reference voltage E is applied to comparison unit 10, integrator 4 is activated, the output voltage increases, as the signals from regulators do not arrive.

The generator 3 starts to generate pulses with increasing frequency, which are fed to one of the inputs of the reversible counter 2. The signal from the flow sensor 1 is not received, the output of the counter 2 is a positive error signal,. which, after being converted in regulator 5, goes to the executive 5 mechanism 6. After it is opened, component 1, having the maximum value of the basic quality indicator, begins to flow into the mixing collector 20, the output of sensor 1 is a signal that goes to counter 2, creating closed loop feedback.

At the output of the sensor 13, measuring the total consumption of leading components {a signal appears, used as a reference signal by the flow controller i of the components (i 3, 4, ..., p), the control channels of which are similar to the control channel of component 1. On the input of the 19-channel control actuator signal is received. After the actuator is opened, the mix collector begins to flow (components (i 3, 4, ..., 1), at the output of the sensor

16, a signal arriving at the second input of the reversible counter 15 results in the creation of a closed-loop feedback.

Voltage with out of controllers

17-i -channels (i 3, 4, ..., p) enter the maximum voltage selection unit 18, the output of which goes to switch 9 and then to the input of comparison unit 10, if there is no Signal from the output of controller 11.

. The output voltage of the selection unit 18 is subtracted from the reference voltage) the input voltage of the integrator 4 decreases and at some point becomes zero, the generator runs at a constant frequency, and the transient process ends. The actuator 12 is closed, the component P, which has the minimum value of the main indicator, does not enter the collector, the output of the analyzer 7 is a deviation signal from the upper limit of the allowable values of the main indicator of the commercial product, which enters the input of the regulator 11 and then the actuator 12 After it is triggered, the flow is the second component having the minimum

the value of the main quality indicator, is fed to the mixing manifold 20, the value of the quality indicator of the commercial product decreases;

At the same time, the signal from the output of the analyzer 7 is fed to the input of block 8, the output of which appears in the event that the value of the indicator is greater than the upper limit

0 valid changes. The voltage from the output of the controller 11 is fed through the switch 9 to the input of the comparator unit 10, the generator capacity and the flow rate of the first component

5 decreases, the performance of the entire system varies slightly.

Thus, the adjustment speed is increased and the stability of the adjustment system is maintained.

0 As a result of the simultaneous change in the costs of the leading components, the value of the quality indicator of a commercial product decreases and becomes less than the upper limit of permissible values. At the output of block B there is a signal, the switch 9 is in the position when the voltage from the regulator 11 is not fed to the input of the generator 3 and its performance is determined by the booster ((channel, 3, 4, ..., p), having a maximum output voltage. Since the system performance always tends to the maximum by increasing the component flow rate with the maximum value of the indicator, the quality indicator of the commercial product will tend to the upper limit of acceptable values and the probability

Receipt rejection is reduced.

The use of a device for controlling the consumption of components during mixing will allow for a more rational use of components and

5 to reduce unit operating costs by adjusting the main quality indicator and reducing the likelihood of a substandard product.

Claims (1)

A DEVICE FOR REGULATING COMPONENT EXPENDITURES IN MIXING, containing a series-connected comparison unit, an integrator and a pulse generator, η channels, respectively, of the number of mixed components, each of which contains a component flow sensor, a reversible counter and a component flow controller, as well as a switch, a setter and a selection unit maximum signal, the inputs of which are connected to the outputs of the respective flow controllers of the component, characterized in that, in order to provide the possibility of regulation , component costs in the event of a continuous change in their quality, it contains a total flow sensor, a switching unit, a component flow sensor with a maximum quality indicator connected in series, an additional reversible counter and a component flow controller with a maximum quality indicator, a mixture quality analyzer and a component flow controller connected in series e minimum quality indicator, and the output of the total flow sensor is connected to the input of the setter, the outputs of which are connected inens with the corresponding first inputs of the reversible counters, the second inputs connected with the outputs of the respective component flow sensors, and the outputs with the inputs of the respective component flow controllers, the output of the maximum signal selection unit is connected to the first input of the switch, the second input of which is connected to the output of the component flow controller with the minimum quality indicator, the third input is with the output of the switching unit, the output is with the input of the comparison unit, and the input of the switching unit is connected to the output of the analyzer A mixture of quality, the output of the pulse generator is connected to the second input of an additional reverse counter.