SU810817A1 - Method of automatic control of cossette-water ratio in diffusion apparatus - Google Patents

Description

The drawing shows a block diagram of the automatic control of the ratio of chips - water in a screw diffusion apparatus.

The method is carried out as follows.

The diffusion apparatus / chips (solid phase) and sulfitated water (liquid phase) enter, the flow rate of which is measured by belt weights 2 and flow meter 3, respectively. Information about the values of these parameters goes to regulator 4: solid-liquid ratio, setting value The ratio is set in the controller 5 by the operator of the diffusion apparatus.

The distribution along the length of the apparatus of the content of solids (sugar) in the diffusion juice is determined by the operator, who with the help of taps 6 - // alternately connects selection devices 13-18 to the refractometer 12. Having determined the solids content values at the sampling points, the operator builds the distribution curve and compares it with the target.

In case of a mismatch of the distribution curves, it finds the sum of the magnitude of the mismatch between the actual and specified values of the solids content (sugar) at the sampling points, calculates the amount by which the ratio needs to be corrected (from the condition that the mismatch requires 0.1% ratio (by 0.5%) and, depending on whether the distribution is actually higher or lower than the specified distribution, respectively, increases or decreases the reference to controller 4 by the ratio correction value.

As a consequence, the controller 4 through the actuator 19 will increase or decrease the consumption of sulfitated water (liquid phase) fed to the apparatus in order to maintain the new value of the solid-liquid ratio.

The use of the proposed method of controlling the extraction process is less than the existing ones:

improved quality of maintaining the specified values of sugar losses in the pulp;

control application with anticipation;

prerequisites for optimizing the extraction process;

application of this method for various types of diffusion apparatus.

Improving the quality of the extraction process, resulting in a decrease in the loss of sugar in the pulp from the target value by only 0.04% by weight of the beets, provides an economic effect for the sugar factory with a capacity of 2.5 thousand tons of beets per day 50 thousand rubles for the production season.

Fore (Mula Invention

A method for automatically controlling the ratio of chips - water in a diffusion apparatus, which involves changing the flow rate of sulfitated water with

the correction of this ratio, characterized in that, in order to reduce sugar losses, the chip-water ratio is corrected depending on the magnitude of the mismatch between the actual and the specified distribution of the dry matter content in the diffusion juice.

The source of information taken into account in the examination:

1. USSR author's certificate No. 486045, cl. C 13 D 3/10 - 1974 (prototype).

,

I

//

, I Tg-J

1 I Ml-

f 4/4/4

Claims (1)

Claim A method for automatically controlling the chip-water ratio in a diffusion apparatus, which involves changing the flow rate of sulfitated water with 30 corrections of this ratio, characterized in that, in order to reduce sugar losses, the chip-water ratio is adjusted depending on the size of the mismatch between the actual and the given distribution of content solids in diffusion juice. The source of information taken into account 40 during the examination: 1. USSR copyright certificate No. 486045, cl. C 13 D 3 / 10-, 1974 (prototype).