SU859445A1 - Method of automatic control of diffusion juice defecation process - Google Patents

Description

(54) METHOD FOR AUTOMATIC CONTROL OF THE PROCESS OF DEFFECTION OF DIFFUSION JUICE

one

The invention relates to the control of technological processes, in particular, to automatic control of the process of defecation of diffusion juice in the sugar industry.

There is a known method for automatically controlling the process of diffusion juice defecation, which involves stabilization of a given content of total lime in defecated juice by adjusting the ratio of diffusion juice and lime consumption with an impact on lime consumption Dl "

The disadvantages of this method of automatically controlling the process of defecation of diffusion juice are the increased consumption of lime supplying it without taking into account the quality of the diffusion juice, the lack of adjusting the consumption of lime to predefinition with a given accuracy and recirculation juice.

The purpose of the invention is to reduce the consumption of lime for defecation and thereby improve the quality of juice cleaning by automatically controlling the process of juice defecation with a different amount of recirculation juice of the first saturation.

This goal is achieved by the fact that in the method of automatic control of the process of defecation of diffusion juice, providing for the stabilization of a predetermined content of total lime in the defended juice by adjusting the ratio of the costs of diffusion juice and

15 exposure to lime consumption, perynHpoBatme, consumption of lime for preliming at a given ratio of lime consumption for main and preliminary defecation

20 with the correction of this ratio due to the cloning of the actual pH value of the pre-pre-fermented juice from the target value and the flow rate of the unfiltered juice of the first carbonation return-; Go to pre-infection, according to the ratio of the costs of diffusion juice and juice of the first saturation, and the ratio of the costs of diffusion juice and lime for defecation is adjusted for the content of nasarov in the diffusion juice. The drawing shows a scheme for implementing the proposed method for automatically controlling the process of juice defecation. The scheme contains a progressive pre-defective unit 1 of the Brigel-Müller system, a main defecator 2, metering units 3 and 4 of active lime, a sensor 5 and a secondary device 6 of an automatic refractometer, sensors 7 and 8 of induction flow meters, transducers 9 and 10, flow meters, electropneumomotive transducers II and 12, regulator 3 ratios, regulating damper 14, regulating valves 15 and 16 with a diaphragm actuator, converters 17 and 18, regulators 19 and 20 ratios ,, block 21 ", block 22 algebraic summation of regulators or 23, a pH meter 24 with a submersible sensor and an electropneumatic transducer 25. The method is carried out as follows. The consumption of diffusion juice and active lime for defecation is measured. The ratio of diffusion juice consumption and active lime is determined by the quality of diffusion juice purity, taking into account the technological regulations of the juice purification process. Therefore, the ratio is controlled by the flow of active lime into the defecator. Then, a continuous correction of the established ratio of the content of nonsugars in the diffusion juice is carried out. For this, the solids content of the diffusion juice and its purity are measured. From these values, the sugar content in the juice is determined by multiplying the value of good quality by the value of the solids content in the juice.

Claims (1)

The content of nonsugars in the juice is determined by subtracting the values of the sugar content from the values of the solids content in the juice. The value of the non-sugars content in the juice corrects the established ratio of the flow rates of the juice and active lime, ensuring the supply of optimal plant lime to the defecation is determined using a dispenser 4 with a converter 18. The electrical output signal of the induction flow meter is converted into a pneumatic signal using an electropneumatic converter 11, the output of which is connected to the input of the regulator 20 ratio. The output stroke of lime to defecate. The consumption of lime for defecation is divided into two streams: the stream going to the ndefecator and the flow going to the main flake. The ratio of the costs of basic and pre-defecation is established empirically and regulates this ratio by the effect on the consumption of lime on the precursor. The established ratio of lime costs to the main and preliminary defecation is corrected by the deviation of the actual pH value of the juice at the outlet of the precursor from the predetermined value. The flow rate of the unfiltered juice of the first carbonation (or suspension) returned to the predefinator is regulated according to the ratio of the flow rates of the diffusion juice and the circulation juice of the first carbonation. The ratio of these expenses set on the basis of technological regulations. 1 Thus, the accuracy of adjusting the lime content in the defecated juice is increased by increasing the accuracy of lime dosing, which is achieved by adjusting the established cost ratios of lime and juice to the content of non-sugar content in the juice, which excludes cases of excess or lack of lime in the juice. Controlling the ratio of the costs of returning the juice of the first carbonation and diffusion juice and regulating the pH of the juice at the outlet of the pre-blender allows for a uniform change in pH in the pre-blender and thereby obtain a juice of good technological quality. The technological scheme of juice purification includes a progressive predzfekkator 1, and the main defekator 2, which are connected in series. Using the sensor 8 induction flow meter with a transducer 9 measure the flow rate of diffusion juice. The solids content of the diffusion juice is determined by an automatic refractometer, including a sensor 5 and a secondary device 6 with a transducer. The flow rate signal of the refractometer is fed to the input of the multiplication unit 21 and the algebraic summation unit 22. Block 21 implements a dependency. DB The value of goodness is entered manually according to the laboratory. Block 22 realizes the dependence of Hc CB-Cx, where Db is the purity of the solution; SV - the content of dry substances in the solution; Sh - sugar content is a solution; The non-sugar content in the solution is not specified. The ratio of the costs of diffusion juice and active lime is established on the basis of the technological procedures recommended by the instruction for the technological process. If the content of dry substances in the juice deviates from the nominal value, the fixed cost-to-lime ratio is corrected by the current value of the non-sugars content in the juice, determined with the aid of blocks 21 and 22. The juice-to-lime cost ratio is adjusted to affect the valve 15 consumption of lime to defecate. Determined) in this way, the flow of active lime for defecation is divided into two streams, one of which is directed to the front of the cuff, and the other. To the main defecator. To do this, install the second lime dispenser 3, by means of which the flow of lime to defecate divided in a predetermined ratio to the preliming and defecation. The inputs of the ratio controller 19 are connected to the outputs of the converters 17 and 18. The pH of the juice is measured using a pH meter 24 installed in the last section of the dreading machine. The% output of the pH meter 24 is connected to the input of the regulator 23 via the electric converter 25. The regulator 23 is set to the prescribed pH of the pre-prespecified juice. At the output of the regulator 23, a signal for the deviation of the actual pH value is formed. from a predetermined, which is a correction signal for the ratio controller 19, by providing a correction for the established ratio of lime consumption for the main and pre-5 defecation by the deviation of the pH of the juice from the predetermined value. The cost ratio is governed by the impact on the valve 16 of the milk flow rate on the pre-blender. The flow rate of the unfiltered juice of the first carbonation is controlled by the valve 14 according to the ratio of the flow rates of the diffusion juice and the juice of the first cuTjrration. For this, the inputs of the ratio controller 13 are connected to the outputs of electropneumatic converters 11 and 12 for the diffusion juice and the first carbonation juice, and the output is for the regulating gate 14. Using the proposed method of automatic control of the juice defecation process, the accuracy of lime dosing to the main and preliminary defecation is improved, necessary for optimal juice cleaning conditions. By increasing the accuracy of controlling the consumption of lime for defecation, a saving of 0.32% of lime to the mass of beet is achieved. The accuracy of controlling lime consumption is increased by the combined principle of regulation, taking into account the quality indicators of diffusion juice. Claims The method of automatic control of the process of diffusion juice defecation, which involves stabilizing a given content of total lime in the decanted juice by adjusting the ratio of the flow rates of diffusion juice and lime to the effect on lime consumption, in order to reduce lime consumption,. the lime consumption for preliming is adjusted by the specified lime expense for the main and preliminary Defecation with correction of this ratio by the deviation of the actual pH value of the pre-baked juice from the specified value and the flow rate of unfiltered juice of the first saturation returned for the predefinition, by the cost ratio of the diffusion juice, and the flow rate of unfiltered juice of the first saturation returned to the predefinition, by the cost ratio of the diffusion juice, and the flow rate of unfiltered juice of the first carbonation returned to the predefinition and juice of the first saturation. .859445g a ratio of the costs of diffusion-sources of information, In this case, the correction and correction for defecation are taken into account in the examination of the content of non-sugars B1. USSR author's certificate diffusion juice. 576339, cl. C 13 D 3/00, 1977. "QiKmitw