SU349898A1 - DEVICE FOR AUTOMATIC DOSING, SOLID AND LIQUID COMPONENTS - Google Patents

Description

Devices are known for a B-Va-t. M, and Icheok 0 solid-liquid and liquid coliponeite dosimetry, containing (solid weight flow control unit, including | weight sensor sensor averaging unit, solid flow repulator, associated with executive mech.ism, articulated with a rheostat of excitement of the two, gigabyte of direct current solid feeder, and the node was regulated by the flow of liquid iKOMiHOHCHTa, including a flow sensor connected to a regulator acting on the actuator, installed on the pipeline along Aci liquid component.

The disadvantage of the known device is. low dosage efficiency: NI | I due to a change in the size of 1 piece of the solid component. This leads to different consequences depending on the process technology, -in (Which 1B1 device is. When dosing crushed custody and alkaline solution in a tubular leach, iKyoKOiB instability greatly influences the instability of the aust modulus of the alumina-lo solution.

When dosing solid and liquid components to a wet breakage mill, a change in the size of the solid leads to a change in moisture output from the pulp mills.

Improving the dosing efficiency by taking into account the average Kuyuk-oa solidity of solid 1m. It is sufficient that the device is snubbed by the sorration unit containing the signal multiplying unit of the weight gauges, the output of which is a solid pacxo.ia averaging unit output connected, n the input of the difference unit connected with | V. of frequency meter connected to the input of the correction regulator, and the output of the last one is connected to the specifying input of the regulator of the liquid component.

The drawing shows a schematic diagram of the proposed device for the case of dosing into a mill of a wet eO.

A device for metering solid and solid KO.MiHoneHTOiB contains a node for automatic regularization and consumption of solid, an automatic control unit} for polishing the liquid and the correction input unit for medium-sized pieces of solid.

The unit for automatic adjustment of the solid component flow consists of a block / averaging signal for solid flow, to the input of which a sensor 3 of weight.srntel 4 is connected through block 2 of signal multiplication. The output of the block is connected to the input block of correction for the size of solid and with the regulator 5 solid flow, at the outlet of which the switch-on excitation resistor 6 of the engine 7 is constant of the drive current of the feeder 8.

The automatical unit for controlling the flow rate of the liquid component consists of a flow sensor, for example, a differential pressure meter 9 complete with a diaphragm 10 that measures the flow rate of the liquid component that flows through the pipeline 12 to the mill 12 and the output 13 of the liquid component connected to the inlet the actuator is connected with the regulatory body 14.

Correction input node; in terms of the average size of solid pieces, consists of a difference block 15, the output signal of which is proportional to the difference between the measured and averaged signals of the consumption of a solid component; the frequency meter 16 And the adjusting regulator 17, the output of which is fed to the master input of the flow regulator of the liquid component 1-3.

The principle of operation of the device is as follows.

From the hopper 18, a solid component is supplied, supplied by the feeder 8 to the weighing device 4 and then to the mill 12. At the same time, the IB mill receives the liquid component. The zuhlia obtained in the grinding process in the mill goes on further (processing. The unit for controlling the solid flow maintains a predetermined weight flow of the solid component. The sensor 8 of the weight measuring device 4 converts the immediate changes in the weight flow into an effective signal of the direct current. is proportional to the average BOMiy flow rate, so the signal from sensor 3, passing through the signal multiplication unit 2, goes to the block / averaging s: G11al, which provides echivaet filtering fluctuations and the average value selection .silnala, iroPortsionalnogo mass flow of the solid.

The flow regulator 5 is solid, and the motor excitation resistor is applied to the direct current, which drives the power supply, when the average flow rate deviates from, this changes the feed rate of the solid feeder, returning the flow rate of the solid to the specified value.

When the liquid flow rate deviates from the specified value, the liquid flow regulator, through the actuator, we control, p1II body 14, installed on the liquid supply pipeline, returns the liquid flow value to the specified one. Odprememeino from the signal multiplication unit 2, a signal that is permeable to the instantaneous value of the solid flow rate, but not equal to the difference unit 15, where the signal from the unit / averaging signal is also supplied. In the difference | block, a sigal is formed, and the difference of the instantaneous and average values of the sensor signal 3.

It is known that the average duration of the fluctuations of the signal coming from the weighing sensor, depends fuctionally on the average slope of the solid component. Since fluctuations of the signal at the output of the sensor occur continuously when the solid is moving, the average duration of fluctuations of the parameter is 5 by the number of fluctuations per unit of time, i.e. by the frequency of fluctuations.

The fluctuation frequency is inversely proportional to the average duration of the fluctuation. The signal from the output of the difference unit 15 is fed to the frequency meter 16, (the output signal of which is fed to the corrective adjustment | 0p17, which selects the average value of the signal n enters and corrects the iB flow regulator of the liquid component 13.

Coordination of the direction of the corrective action, taking into account the inverse proportionality of the average value of the fluctuation frequency versus the duration

fluctuations or from the average size of the solid component with the direction of displacement of the regulating organ 14, as well as the choice of the temporal law of the corrective effect (continuous, positional, impulse) is made during the adjustment of the device. Thus, at the output of the correction regulator 17, a 1sial is formed, functionally related to the average particle size of the solid component.

Subject invention

A device for automatic dosing of solid and liquid components containing a weight control unit

solid, including the averaging unit of the signals of the weight gauge sensor, the flow regulator of the solid, associated with an operating mechanism coupled to the motor excitation rheostat of the solid feeder, and the flow control unit of the liquid component, including the flow sensor coupled to the regulator, acting on the actuator mounted on the pipe} liquid supply line

co.mayunent, characterized in that, for the purpose of increasing the efficiency and dosage of the metering means among the size of the solid .KOMiHO.neiHTai pieces, it is syabheno by the spore section containing the breeding unit

weight meter signals, the output of which and the output of the averaging unit of solid flow are connected to the inlet of the difference block connected to the frequency meter input, paddled up 1t. inlet corrected; its controller

The output of the latter is connected to the back of the IZCIM B: by the course of the regulator of the liquid component.

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