SU1490157A1 - Saturator for sugar-beet production - Google Patents

Abstract

The invention relates to equipment of the sugar industry, in particular to apparatus for the saturation of sugar-containing solutions. The invention improves the quality of the juice. The saturator includes a vertical cylindrical body 1 with an extended upper part 2 and a conical bottom 3, a vertical cylindrical chamber 4 installed in the center of the body, with a nozzle 5 placed in its lower part for spraying liquid and equipped with a pipe 6 for gas supply and a standpipe 7. The saturator also includes a funnel 8 installed in the lower part of the body coaxially with the standpipe and with a gap, with the neck upwards forming the zone of holding the juice, and the cup 9 mounted on the standpipe bottom up. There is a control box 10 for juice output. Glass 9 forms a water lock with the mouth of the funnel to pass the evolved gas in the funnel and distribute it in the juice layer over the exposure zone, the glass 9 being installed with the possibility of reciprocating movement. To adjust the gap between the bottom end of the cup and the outer surface of the funnel, a mechanism is used, which includes a rod 11 and a toothed rack 12 mounted on the outside of the cup. 1 hp f-ly, 2 ill.

Description

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the center of the body is a vertical cylindrical chamber 4 with a nozzle 5 placed in its lower part for spraying liquid, equipped with a gas supply nozzle 6 and a standpipe 7. The saturator also includes a funnel 8 installed in the lower part of the body coaxially with the standpipe and gap, mouth up, Q forming the zone of aging juice, and a glass of 9, mounted on the standplate bottom up. There is a control box for juice output. 10. Glass

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9 forms with the throat of a funnel a hydroseal for the passage in the funnel of evolved gas and distribution in the layer of juice above the exposure zone, the cup 9 being installed with the possibility of reciprocating movement. To adjust the gap between the bottom end of the cup and the outer surface of the funnel, a mechanism is used, which includes a rod 11 and a toothed rack 12 mounted on the outside of the cup. 1 ep f-ly, 2 ill.

The invention relates to equipment for the production of sugar, namely, saturators for cleaning sugar-containing solutions by the lime-carbon-dioxide method,

The purpose of the invention is to improve the quality of the juice.

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Figure 1 shows the saturator, a longitudinal section; figure 2 - section aa in figure 1.

The saturator includes a vertical cylindrical body 1 with a widened upper part 2 and a conical bottom 3, a vertical cylindrical chamber 4 installed in the center of the body with a nozzle 5 placed in its lower part for spraying liquid, equipped with a nozzle 6 for gas supply and a standpipe 7. Saturator It also includes a funnel 8 installed in the lower part of the body coaxially with the standpipe and with the gap upwards forming the juice holding zone, and a cup 9 mounted on the standpipe bottom up. There is a control box 10 for draining the juice out of the apparatus. The glass 9 forms with the neck of the funnel a hydraulic lock for passing the evolved gas in the funnel and distributing the juice in the juice layer over the holding zone, the glass 9 being installed with the possibility of reciprocating movement. To adjust the gap between the bottom end of the cup and the outer surface of the funnel, a mechanism is used, which includes a brush 11 and a toothed rack 12, closed by a protective casing 13 and fixed to the outer surface of the pipe 14 fixed to the glass 9.

The saturator works as follows.

The refined sugar-containing solution flows under pressure (2-6) 10 Pa to nozzle 5 and is sprayed in cylindrical chamber 4. Into the upper part of cylindrical chamber 4 through pipe 6 under pressure (0.4-0.5) 10 Pa (excess) fresh saturation gas. In chamber 4, the co-gas mixture is under an overpressure determined by the height of the liquid column from the point where the gas enters the bubbling solution to the level in the control box 10. Then the two-phase mixture moves along the standpipe 7. In its lower part, the juice and gas are separated. The saturation gas, changing the direction of its movement, is mainly freed from the drops of juice and, after passing through the water trap, exits through the lower edge of the glass 9, barbling through the solution layer. The sugar-containing solution then enters the funnel 8 and gradually, without moving, flows from below, entering the bubbling zone.

In order to increase the efficiency of the rack mechanism under conditions of intensive scale formation during conduction and one saturation, it is proposed to move the lath-moth node into the superspace of the saturator, where scaling is absent. This makes it possible to adjust the gas flow through the apparatus.

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during the entire production season.

In the vertical cylindrical chamber 4, a defocused dispersed sugar-containing solution with an average alkalinity of 1.2-1.3% CaO interacts with fresh saturation gas with a high partial pressure of carbon dioxide. As a result, the alkalinity of the defecated juice rapidly decreases by 20-30% from the original and the alkalinity of the juice is lower than 1% CaO, at which the most intensive process of purifying the juice from various groups of nonsugars is observed. After separation of the juice and gas, the sugar-containing solution enters the funnel 8, where it is kept, gradually moving to the opposite open end of the funnel, without mixing for a certain time. Due to the fact that the juice contains the smallest bubbles of saturation gas with unreacted CO, and their rapid release from solution is prevented by excessive pressure from the side of the cylindrical chamber 4, the chemical reaction of the dissolving CaO with carbon dioxide continues to form in the funnel CaCCj. In this case, the growth of previously formed calcium carbonate crystals due to the formation of CaCO, accompanied by intensive deposition of various groups of nonsugars on a constantly renewed surface of CaCO crystals, is observed.

In the solution leaving the spray absorber, there is an amount of CaCOj at which it becomes supersaturated and the process of rapid nucleation of CaCOj crystals begins.

The funnel maintains a low level of calcium carbonate solution due to the chemical reaction between the dissolved lime and the carbon dioxide contained therein. Keeping the crosshair contributes to the gradual growth of simultaneously nucleated crystals, while non-sugar is adsorbed intensively on their developed surface.

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The saturation gas, the exit from the gap formed by the lower open end of the glass and the outer surface of the funnel, in the main volume of the saturator's body, by means of bubbling, makes general mixing. the

Since the desaturation of the CaCOj solution is small, the probability of the formation of new embryos is small, but the growth of calcium carbonate crystals continues during the simultaneous deposition of nonsugars on their surface. Sediment crystals have a more homogeneous composition, which has a beneficial effect on the operation of sumps and filters.

The proposed saturator makes it possible to improve the quality of the juice by organizing a common flow of juice – gas phases and a progressive decrease in the alkalinity of the juice.

Claims (2)

1. An attorney for beet sugar production, comprising a vertical cylindrical body with an expanded upper part and a conical bottom, a vertical cylindrical chamber mounted in the body d: a liquid spray nozzle placed in its lower part, equipped with a supply nozzle and a standpipe, which differs from that, in order to improve the quality of the juice, the cylindrical chamber j / is placed in the center of the body, while in the lower part of the latter it is placed in alignment with the standpipe and with a gap Onka neck upwards forming zone juice extracts, the housing is provided with a cup mounted on the standpipe bottom upwards, forming the water seal with the neck of the funnel in the funnel to pass the evolved gas and its distribution in the layer above the juice soaking zone. 2. Saturator pop.1, characterized in that the glass is installed with the possibility of vertical reciprocating movement. Figg