SU977492A1 - Apparatus for predefecation of diffusion juice - Google Patents

Description

(54) INSTALLATION FOR PRE-DEFINITION OF DIFFUSION JUICE

one

The invention relates to the sugar industry, in particular, to installations for the automation of technological processes of sugar production.

A known device for the preliming of diffusion juice, consisting of a predefecator and an automatic control system for the supply of milk of lime to a predeterminer, which includes a pH meter of preliminarily dispensed juice, flow meters of diffusion juice and milk of lime, while the flow meters and pH meter are connected to the input of a ratio regulator of two. parameters with correction for the third, the controller output is connected to the actuator installed on the milk milk supply line (or juice of the main defecation) I and 2.

A disadvantage of the known installation is that it does not ensure that the preliming process is conducted optimally, since by regulating the consumption of milk of lime in terms of the diffusion juice consumption with a correction for the predefinate pH: this juice, it stabilizes the pH value of the preliminated juice, which is not straightforward but

indirect parameter of the process of predefinition, since the pH value does not clearly reflect the optimal state of the process of predefinition, because depends on the quality of the diffusion juice and, accordingly, varies in the range of pH 10.6-11.6. Under factory conditions, in order to keep the process under conditions close to optimal, it is necessary to continuously determine the required pH value by changing laboratory quality of the juice, then enter it as a pH regulator for the pre-dispensed juice, and due to the complexity of chemical Analysis of the process of predefinition in sugar factories is not carried out under optimal conditions, which reduces the quality of purification of diffusion juice and leads to waste of milk of lime. The purpose of the invention is to improve the quality of purification of diffusion juice and reduce the consumption of lime.

This goal is achieved by the fact that in a plant for the preliming of a diffusion juice containing a predeterminer, flow meters of diffusion juice and lime, connected to the input of the ratio controller, the output of which is connected to an actuator installed on the lime supply line to the predeterminer, a distinctive feature is that it is equipped with an additional predeterminer, and sensors for determining the speed of sedimentation of juices, installed at the output of predefinicators, and the sensors for determining soon minute settling juices regulator connected to the input ratios torus.

The drawing shows schematically an installation for the preliming of diffusion juice.

The installation for preliming diffusion juice contains preliming unit 1, additional predeterminer 2, sensors 3 and 4 for determining the juice settling rate, an instrument 5 installed at the output of predefecators, used to determine the difference in juice settling rates, diffusion juice flow meter with pneumatic output, and flow meter 7 for predefection. , the controller 8 of the ratio of two parameters with the correction of the third, the dispenser 9 lime.

The installation works as follows.

The pre-refined juice in a small amount, for example 1-2% of its total consumption, comes from pre-defector 1 to an additional pre-defector 2, where a small amount of milk of lime is simultaneously delivered. The additional predeterminer 2 is a cylindrical vertical vessel, inside it is equipped with a paddle mixer with a rotational speed of 20-30 rpm, for better mixing of the juice with lime milk inside, a vertical counter fender preventing the circular movement of the juice is fixed on the body wall. Juice from predefecator 1 and milk of lime come to the lower part of the additional predefiner 2 and, when moving upward, move intensively, the processed juice is withdrawn through the upper overflow communication. The volume of the additional predeterminer 2 is selected and the condition of 1-2 minutes of juice in it in the amount of I-2 ° / o of the total consumption of pre-refined juice. Due to the fact that additional quantities of juice and milk of lime are supplied to the additional predeterminer, their consumption, when adjusted, is installed by cranes mounted directly on the predeterminer and milk of lime before the dosing unit, ITo eliminates their blockage. An additional predeterminer is equipped with receiving funnels to visually monitor costs. The consumption of milk of lime for an additional predeterminer when setting up the system is set so that the pH of the juice after it is insignificant, for example, 0.1 pH more than the juice of the juice after the main predeterminer. In order to ensure simultaneous processing of the juice of the same quality in the main and additional pre-defector, the juice is extracted from the main pre-defector in the place where the juice is already practically processed, i.e. Its pH is maximal, but the time required is still the stay, equal to the residence time of the juice in the additional predeterminer, i.e. 1-2 minutes is not income to exit from the main predefinitor. The regulation of the consumption of milk of lime on the main predeterminer 1 is carried out as follows.

Devices 3 and 4 settling rates measure the settling rates of the juice after the main and additional predeterminers. The output signals of the sedimentation rate devices are fed to the device 5, which serves to determine the difference in sedimentation rates, which, depending on the sign of the difference in sedimentation rates, with its output changes the ratio of the regulator 8 between the diffusion juice flow rate measured by the flow meter 6 and the lime milk consumption measured by the flow meter 7. The regulator 8 controls the dispenser 9, which increases or decreases, in accordance with the sign of the difference between the juice settling rates, lime milk consumption for fekatsiyu. If the rate of additional sedimentation after the predefecator is greater than the speed of sedimentation after the main predetonator, increases

° consumption of milk of lime on preliming. If, on the contrary, it decreases. Moreover, in the dynamics of regulation, an increase or decrease in the consumption of milk of lime will occur until the rate of settling of the preliminated juice becomes maximum for a given quality of diffusion juice. Thus, the installation will provide optimal conditions for bringing the predefinition process, as the maximum rate of settling of the pre-juice will be achieved with the varying quality of the diffusion juice entering the predefinition.

As a result of the use of the proposed plant for the preliming of diffusion juice, the quality of the juice is improved and its quality is increased by 2 ° C, which saves sugar by 0.033% by weight of the processed beets. In addition, the consumption is reduced by 0.05% lime per predefinition.

Claims (3)

1.Azrilevich M. Ya. And others. Fundamentals of automation of sugar beet production processes. M., 1968, p. 327. 2. Voloshin 3. C. and others. Automation of sugar beet production. M., 1980, p. 117-123 (prototype). O-HXJ  .9. /