SU991262A2 - Device for measuring pulp density in a reservoir - Google Patents

Description

The invention relates to devices for measuring and regulating the technological parameters of chemical, hydrochemical, food, for example fermentation, industries and can be used in measuring the density of liquids in tanks.

According to the main author of St. 675346; A device is known for measuring the density of a pulp in a tank, consisting of a diflunometer, measuring the differential pressure over the height of a pulp column connected to the tank by means of separation vessels located at pressure take-off points on the tank or vertical pipelines, at different heights, equipped with separating membranes and connecting (impulse) tubes, filled with working fluid. A differential device is connected to the differential pressure gauge, according to a diffusion transformer circuit, indicating pulp density.

The device is also equipped with a high-level signal generator in the tank and a valve installed above the negative manometer of the master pressure gauge and a controlled relay connected to the output of the level indicator 1 1J.

However, the use of a known device in winemaking allows to measure only the density of the wort, but it does not allow sufficiently to measure the concentration of sugar and crust, i.e., during fermentation, i.e. in the presence of alcohol.

The aim of the invention is to improve the accuracy of the density measurement

10 fresh, fermenting, and alcoholic wort, as well as the concentration of sugar and alcohol in it during fermentation and alcoholization without sampling from the reservoir.

15

The goal is achieved by the fact that the device is equipped with an adder, an indicator of the concentration of sugar and alcohol, and two sensors built into the secondary indicating device, while the adder's input is connected to the sensors, and the output is to the indicator.

FIG. 1 shows a diagram of the device; in fig. 2 - electric circuit of the device; in fig. 3.- schedule zag

25 dependence of density increment on concentration.

The device includes a reservoir I, in which devices 2 and 3 are made for taking pressure drop.

30 of the same height of the pillars controlled 4 and the working fluid. Separating in the loose membranes 5 and b, connected to the differential pressure gauge 7 by means of impulse tubes i8 and 9 filled with a standard liquid, the density of which is equal to the minimum density of the controlled liquid, such as water, are embedded in these methods. Above the inlet to the negative chamber of the differential pressure gauge, a valve 10 is installed, for example, a solenoid valve or a solenoid valve. At the height of the maximum level in the tank, the sensor 11 of the upper level of the automatic level 12 alarm indicator is installed. In addition, a block 16 is included, algebraically summing the normalized voltages, ordered from sensors 17 and 18 embedded in the secondary indicating device 15, as well as a high-resistance indicator 19, for example, of a digital type, connected to the output of the summing unit 16. A voltage sensor 18 integrated in the device 15 is connected to its measuring part, and the sensor using a manual pick-up screw 20 fixes the initial value the density of the wort at the beginning of its fermentation or alcohol. The summing unit 16 consists of a transformer 22, the low-voltage secondary windings 23 and 24 of which are fed through a three-position one to four circuits, switch 21 / sensors 17 and 18 embedded in the secondary indicating device 15, as well as a high-resistance voltmeter 19, for example, of digital type, connected to the output of the summing unit 16. Sensors 17 and 18 are connected to the transformer windings feeding them through normalizing resistors 26-31. Transformer 22 is also supplied with an auxiliary winding 25 supplying additional constant-voltage sensor 33 normalizing of the resistor 32. The device operates as follows. After filling tank 1 with grape wort to the maximum level from sensor 12, a pulse is given which triggers relay 13. The latter turns on the power supply to the solenoid actuator), which opens valve 10. Relay 13 also includes signal devices 14 and power supply telemetering system between the differential pressure gauge 7 and the secondary device 15, as well as the power supply of the summing unit 16 and the digital indicator 19. After switching on the differential pressure gauge 7 and the secondary device 15, e The measuring system will measure the initial density value of the Fresh wort into the wort tank and later, during its fermentation and alcoholization, it measures the current density value of the other fermenting and spirited wort in the tank. Depending on the position of the switch 21, the summing unit 16 provides signals proportional to the concentration of sugar (GCX) alcohol concentration (Sel) or Increments of alcohol concentration as a result of alcoholization. According to the chemical reaction of bro. marriages of monosaccharides (glucose and fructose, causing the sugar content of the wort) 4V ° 6-2CiH. OH + 2CO, FROM GE ammolecule 1 sugar g forms 2 grgmdaydulekuly alcohol (ethanol) 92 g, i.e. 0.5 g of alcohol is formed from 1 g of sugar. Considering that the density of pure alcohol is about 0.8 g / ml, the alcohol formed from 1 g of sugar has a volume of 0.64 ml. Taking into account the compression of Contraccinic-alcohol-water mixture, we assume that 0.6 vol.% Of alcohol is formed from 1 g of dissolved sugar. The fermentation of grape must is accompanied by a decrease in its density for two reasons: by reducing the concentration of sugar, as well as by increasing the concentration of alcohol, the density of which is less than the density of water. . As can be seen from the graph of dependences of the increment of the density rp (relative to the density of water) of aqueous solutions of sugar and alcohol as a function of their concentrations (Fig. 3), the dependence of AC (Ccx) is Ai. 3 86. Lx U / lOO cn / and f () is equal to uf, -.X, Ug / ml V i- - (1.2g1.5) 101 „1, L-cf Cf / a and the dependence D b – c at condition 0.6; dS, (%), is equal to 4. +, 3.86 + (1.2g1.5) di ,. D cA with l tp / MG / G / ShN, 6 4.58 g 79 g / 100mlSep /

Accept averaged 4,, 79z: 4, i.

From these data it follows that the current value (during the fermentation of the wort) sugar concentration (and alcohol in it according to the increments measured by this device relative to the water density of fresh ufj, and the priming wort can be calculated by the equations:

n Ari-dut about 047 DR + 3,864,70,01 / JH +

sc

+ 0,213- - A (g / 100 ml), (1)

where А 1,5 4 2,5 ;;

   Ph) o, 6.Afti:

 0.127 (L9, -l) 0.127dr -0.127lrg (%) and during the alcoholization increment of the alcohol concentration of the ASCV 3 equation

ls- 071 .G

where Lr g .d increments (relative) density at the end of fermentation and alcoholization.

The positive effect of using, for example, in the winemaking of this device is based on the fact that, thanks to automation with its help, the current monitoring of the course of the fermentation of grape must in the tanks according to the content of caxaj a and

of alcohol and ensuring that this process is managed, it is possible to obtain a precisely specified value of the concentration of residual sugar and stop fermentation in a timely manner and begin to alcoholize, which as a result allows to achieve the specified values for the concentration of sugar and alcohol in the resulting winematerial without additional blending operations (topping up

dosed volumes of other wine varieties of different composition). This eliminates the loss of wine products associated with the performance of onepaiuitt blending, which is 0.2% of the co5 according to the norms.

Claims (1)

1. USSR author's certificate 675346, cl. G 01 N 9/26. 1977.