SU1585336A1 - Method of treating diffusion juice - Google Patents

Abstract

The invention relates to the sugar industry and can be used in sugar beet production in the purification of diffusion juice. The aim of the invention is to reduce the color and the content of calcium salts in the purified juice. The method includes pre-and main defecation of the juice, the first carbonation in two steps with intermediate filtration, the second carbonation and filtration. At the same time, milk of lime is added to the juice before the second stage of carbonation and additional defecation is carried out, and before the second carbonation, calcium carbonate suspension in the amount of 14-18% CACO 3 is added to the mass of diffusion juice nasarov.

Description

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(21) 4A48626 / 31-13

(22) 06/27/88

(46) 08/15/90. Kyul No. 30

(71) Voronezh Technological Institute

(72) V.A. Golybin and Yu.I. Zelepukin

(53) 664.1.038.8 (088.8)

(56) Sapronov A.R., Bobrovnik LD. Sugar. M .: Light and food industry, 1981, p. 106-108.

Patent of CPP number 85436, cl. C 13 D 3/12, 1984.

(54) METHOD FOR CLEANING DIFFUSED JUICE

(57) The invention relates to the sugar industry and can be used in sugar beet production during the purification of diffusion juice. The aim of the invention is to reduce the color and the content of calcium salts in the purified juice. The method includes pre-and main defecation of the juice, the first carbonation in two steps with intermediate filtration, the second carbonation and filtration. At the same time, lime milk is added to the juice before the second stage of the carbonation and additional defecation is carried out, and before the second carbonation, a suspension of calcium carbonate in the amount of 14-18% CaCOE is added to the mass of nonsugars of the diffusion juice.

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The invention relates to the sugar industry and can be used in sugar beet production in the purification of diffusion juice.

The purpose of the invention is to lower the 1dness and the content of calcium salts in. purified juice.

The method is carried out as follows.

Diffusion juice is subjected to preliminary defecation by adding to it a condensed suspension of the second stage of the first carbonation, a thickened suspension of the second carbonation and 9-10% CaO of the total consumption of lime for purification at 59-61 ° C for 10-11 minutes. The total consumption of CaO for purification is 100% CaO to the mass of unsaved diffusion juice. Then a warm main defecation is carried out (59-61 C, 19-20 min, 60-62% CaO from

 total cleaning costs); hot main defecation (84-85 ° C, 9-10 minutes). The first stage of the first saturation (up to pH 10.8-11.2), filtration, additional defecation (84-85 C, 5-6 min, 19-207, CaO); the second stage of the first saturation (to pH 10.8 - 11.2), filtration; After that, the juice is injected with a suspension of calcium carbonate with a density of 1.16 and a pH of 11.0– 11.2 in the amount of 14–18% CaCO to the mass of non-sugars of diffusion juice, which corresponds to 8–10% CaO to the mass of non-sugars of diffusion juice and the second saturation is carried out (up to pH 9.0-9.5) and filtered. Calcium carbonate suspension is obtained by saturation of milk of lime in the amount of 8-10% CaO by weight of non-sugar diffusion juice to pH 11.0-11.2.

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A positive effect is achieved due to the fact that additional defecation before the second stage of the first saturation allows for more complete decomposition reactions of high-molecular compounds, reducing substances and other groups of nonsugars, which are then adsorbed on the first and second stages of the first and second saturation. The introduction of pure calcium carbonate before the second saturation allows better adsorbing of nonsugar to the second saturation and significantly improving the quality of the purified juice, since CaCO particles introduced into the juice have a large adsorption surface and after the addition of nonsugars to the juice on the surface, active adsorption of nasacars occurs. Subsequent saturation of the solution to a pH of 9.0-9.5 allows MaKCHi-ianb but completely remove the coloring matter from the solution.

Adding calcium oxide before the second saturation is impractical because the alkalinity reduction causes an additional undesirable breakdown of sucrose and some sugar, i.e., a softer mode is needed: treatment at the final stage of purification. Entering pure calcium carbonate allows the desired gentle cleaning mode. As a result, it is possible to increase the overall effect of removing non-sugars from the diffusion layer. The amount of pure calcium carbonate added is 14–18% CaCO, and the mass of non-sugars from the diffusion juice corresponds to a consumption of 8–10% CaO to the mass of non-sugars from the diffusion juice. This CaO consumption allows two optimal levels of saturation under optimal conditions, t, e, to create the necessary amount of calcium carbonate for more complete removal of non-sugars, as well as to maximize the effectiveness of the second saturation for the purpose of additional non-sugars output from the juice.

Example 1 Diffusion juice P 84.60% is subjected to purification, including pre-defecation by mixing the juice with a thickened suspension of juice of the second stage of the first saturation and thickened suspension. second carbonation, add 10% CaO of the total consumption for purification at 60 ° C for

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Warm basic defecation is performed (60 ° C, 20 Min, 60% CaO); hot main bowel movement (, 10 min); the first stage is the first saturation (up to pH 11.0); filtering; additional defecation (85 C, 5 min, 20% CaO); Next, perform the second stage of the first saturation (to pH 11.0); filtering; Calcium carbonate suspension in the amount of 18% CaCO to the mass of non-sugars of diffusion juice, which requires 10% CaO to the mass of non-sugars of diffusion juice, is introduced into the juice, and a second saturation (to pH 9.2) and filtration are carried out. Indicators of the purified juice are the following; s: chromaticity 8.9 uel, unit, calcium salt 0.55% by weight of the juice.

Example. 2, Diffusion juice P 84.60% is subjected to purification, including pre-defecation by mixing the juice with a thickened slurry of the second stage of the first saturation juice, thickened by the second saturation suspension with the addition of 10% CaO of the total consumption for purification at 10 minutes. Then, warm main defecation is carried out (, 20 min, 62% CaO); hot main defecation (85 ° C, 10 min), the first stage of the first saturation (to pH 11.0); filtering; additional defecation (85 ° C, 5 min, 20% CaO); the second stage of the first saturation (up to pH 11.0); After that, a suspension of calcium carbonate in the amount of 14% CaCO by weight of non-sugar diffusion juice is introduced into juice, for preparation of which 8% CaO is used by weight of non-sugar diffusion juice; the second saturation is carried out (up to pH 9.2) and filtration. The display of purified juice is as follows: chromaticity 8.3 uel, unit, calcium salt 0.53% by weight of the juice.

Example 3 Diffusion juice P 84.60% is subjected to purification, including pre-defecation by mixing the juice with a thickened suspension of the second stage of the first saturation juice, thickened with the second saturation suspension with the addition of 10% CaO of the total consumption for purification at 60 ° C for 10 min. Preddefekovannym juice is subjected to a warm main defecation (, 20 min, 58% CaO), a hot main defecation (85 C, 10 min), the first stage of the first

saturation (up to pH 11.0); filtration of additional defecation (, 5 min, 20% CaO) j of the second stage of the first saturation (to pH 11.0) and re-filtration. Then, calcium carbonate suspension is introduced into the juice in the amount of 21% CaCOj to the mass of non-sugars of diffusion juice, the preparation of which consumes 12% CaO to the mass of non-sugars of diffusion juice; the second saturation is carried out (to pH 9.2) and filtration. The indicators of the cleaned cell are as follows: chromaticity, 10.1 used units, calcium salts, 0.59% by weight of juice. Example 4. Diffusion juice; H 84.60% is subjected to purification, including pre-defecation by mixing the juice with a thickened slurry of the second stage of the first saturation juice, thickened by the second saturation suspension with the addition of 10% CaO of the total consumption for cleaning at 10 minutes . Next, the juice is subjected to warm main defecation, 20 min, 64% CaO); hot main bowel movement (85 ° С, 10 min), first stage of the first saturation (up to pH ll, 0) i filtration} of additional defecation (85 ° С, 5 min, 20% CaO) and second stage of the first saturation ( to pH 11.0). The juice is filtered and calcium carbonate suspension is introduced into it in the amount of 11% CaCO to the mass of non-sugars of diffusion juice, for the preparation of which they consume 6% CaO to the mass of non-sugars of diffusion juice. Next, a second saturation (to pH 9.2) and filtration is carried out. Indicators of purified juice are as follows: chromaticity 9.4 sr. units,. calcium salt 0.58% by weight of juice.

Example 5. Diffusion juice P 84.60% is purified, including pre-defecation by mixing the juice with a thickened slurry of the second stage of the first saturation juice and a thickened suspension of the second saturation. 10% CaO is added to the reddening of the total consumption for purification during 10 minutes. Then a warm main defecation (, 20 min, 61% CaO), a hot main effluent (, 10 min), the first duct of the first saturation (to pH 11.0), illtraction, additional defecation-O) (85 ° C, 5 min, 20% CaO), the second stupa of the first saturation (up to pH 11.0);

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1585336

filtering. Then, calcium carbonate suspension in the amount of 16% CaCOj to ijacce non-sugars of diffusive juice, in preparation of which I consume 9% CaO to the mass of non-sugars of diffusion juice, is introduced into the juice, second saturation to pH 9.2 and filtration is carried out. Indicators of purified 10 juice are as follows: chromaticity, 7.1 used units, calcium salt, 0.50% by weight of juice.

When cleaning the diffusion juice H 84.60%, the prototype method carried out a preliminary defecation 15 by mixing the juice with a thickened suspension of the second stage of the first saturation at 55 ° C, heated the juice to, add 0.30% CaO to the beetroot mass (15% CaO of the total cost of cleaning), the total consumption of CaO for cleaning is 100% by weight of non-sugars of diffusion juice; the first stage of the first saturation is carried out (up to pH 11.0), settling, the main 25 defecation (, 15 minutes, 85% CaO of the total consumption for cleaning), the second. stage of the first saturation (up to pH 11.0); heat the juice to, filter, conduct a second saturation (to 0, pH 9.2) and filtering. Indicators of purified juice are as follows: chromaticity 11.9 sr. units, calcium salt 0.66% by weight of juice.

Claims (1)

The proposed method for purifying the sugar-g rich solution makes it possible to reduce color by 38–40% in the juice of the second saturation and reduce the content of calcium salts in it by 20–22% compared to the prototype. A reduction in the color of the purified juice makes it possible to reduce the color of the products coming to boil the loaf of the product, reduce the color of the granulated sugar, which makes it possible to get 5 sugar in accordance with GOST, even when processing beets of a reduced technological quality. A decrease in the content of calcium salts in the purified juice reduces the loss of sugar in the molasses, reduces the process of formation on the upper tubes of the apparatus, reduces the time of boiling the juice to syrup and reduces the increase in its color, improves gccnosKK boiling of the massecuite in ffOBOM branch of a sugar factory. Invention Formula I Diffusion rock cleaning method: including preliminary. And basic. 715853368 defecation, pervuk, saturation in the two first saturation carry out dopop; : t7: r- tn -Z with Gr: gltoGGO: l; what. in order to reduce color and, calcium in the amount of 4. CaCO - to the mass of non-sugars of diffumed calcium salts in purified ..zion juice Mr. Juice, before the second stage.