SU1306958A1 - Method of purifying sugar-containing solutions - Google Patents

Abstract

The invention relates to the purification of sugar-containing solutions and can be used in sugar beet production. The aim of the invention is to increase the cleaning effect and reduce the cost of the process. The method consists in the fact that when cleaning the diffusion juice by preliming it with 0.25-0.3% CaO to the mass of beet, defecacin 5 1 saturation, filtering, II saturation and filtering for pre-defecation to the zone with pH 1-1, 5, 0.4-0.5% by weight of the adsorbent beet is introduced, for which lime is used, processed in a finger-type disintegrator to a particle size of 1-20 microns. The same adsorbent is also injected on I with saturation in an amount of 1.5-2.6% by weight of beet, and the defecation is carried out with lime in an amount of 0.8-1.0% CaO by weight of beet. with "g (L so OA: 0 ate CX5

Description

The invention relates to the purification of sugar-containing solutions, in particular, diffusion juice from non-sugar, and can be used in sugar beet production.

The aim of the invention is to increase the cleaning effect and reduce the cost of the cleaning process.

The method is carried out as follows.

Diffusion juice, heated to 60-65 C, is fed into the apparatus of progressive pre-defecation. As alkaline reagent, lime milk is used in the amount of 0.25-0.30% CaO by weight of beet. Processed in a finger-type disintegrator to particle sizes of 1–20 µm, lime is added in an amount of 0.4–0.5% by weight of the beets to the mixer, where a small amount of juice arrives from the pre-blender, providing a suspension with a density of 1.14–1 , 15 g / cm. By pump. Suspension is fed to the precursor compartment with a pH of 8-8.5 for carrying out the processes of precipitating nonsugars.

When processing limestone in a finger-type disintegrator, along with grinding particles up to 1–20 µm in size, they are activated, i.e. the creation in the particles by mechanical treatment of a defective structure, contributing to an increase in their reactivity, in particular, the adsorptive capacity of calcium carbonate treated in this way is significantly higher than when other grinding devices are used for this purpose. This provides a high effect of juice purification on defecation.

At the outlet of the pre-blender, the juice has a pH of 11.2-11.3. Then the juice is fed into the main bowel apparatus, where 0.8-1.0% CaO is added to the mass of beets to decompose reducing substances and amcets. From the defecator, the juice enters the saturation apparatus I, from where a part of it is selected to prepare a suspension of limestone treated in a disintegrator at a lime consumption of 2.0–3.0% by weight of beet, which is equivalent to 1.0–1.5% of lime . The suspension is introduced into the saturator. In the saturator, the juice is treated to alkalinity with 0.08-0.1% CaO and sent for filtration.

Replacing the calcium carbonate precipitate formed under the conditions of I saturation with lime treated with a disintegrator provides D1 with a sufficiently high completeness of the deposition of nonsugars and the formation of a precipitate structure ensuring a continuous process. The crushed calcium carbonate (limestone) is introduced in a dry form, which excludes the return of the purified juice to the predefinition together with the non-sugars precipitate, which can pass back into solution.

After filtering, the juice is subjected to saturation II to alkalinity. 0.02% CaO and after filtration the juice is analyzed.

Example 1, Diffusion. Juice (, 6%) is treated with lime in an amount of 0.3% by weight of beets.

Then, two cleaning methods are compared: a typical one - with a 2.3% lime stooling rate and the proposed one - with a defecation rate of 0.8% lime and replacing 1.5% lime with an equivalent amount (3.0%) of the lime-type treated in the disintegrator ka, with 0.5% of it being introduced for predefinition, and 2.5% for saturation. Comparison of the quality indicators of juices shows that the content of calcium salts in the purified carbonation juice II is 0.114% CaO in the typical method, and according to the proposed 0.106% CaO, the goodness is, respectively, 86. 2% and 86.4%. The color of the purified juice in the proposed method was lower by 5.3-5.8%. The filtration rate of the juice I saturation according to the standard method is 5.3 and according to the proposed 5.1, the sedimentation rate is 3.5 and 3.9 cm / min, respectively. Thus, the replacement of 1.5% lime with a cleaning equivalent of the amount of lime treated in the disintegrator improves the quality of the cleaned juice compared to a typical cleaning method.

. When replacing 1.5% lime with a diffusion juice purification with an equivalent amount (3%) of lime treated in a disintegrator, the amount of FLOURING for juice cleaning for a sugar beet plant with a production capacity of 3 thousand tons of beet processing per day and a juice production time of 110 days is reduced from 7425 to 2970 t.

11 p m m e p 2. Diffusion juice (, 6%) is treated with lime in an amount of 0.3% by weight of beet. Then, two cleaning methods are compared: the typical one - with a depletion rate of 2.3% lime and the proposed one with a depletion rate of 0.6% lime and the replacement of 1.7% lime with an equivalent amount (3, А%) of lime treated in the disintegrator while 0.5% of it is introduced for predefinition, and 2.9% for saturation. A comparison of the qualitative and sedimentation-filtration indicators of the juices shows that they are worsened by the proposed cleaning method. In the purified juice of carbonation II, the content of calcium salts according to the standard method is 0.118% CaO, and according to the proposed 0.138% CaO. The color of the purified juice according to the proposed method increased by 19.6-20.1%, and the purity decreased from 86.4% according to the standard method to 86.08% according to the proposed method. The coefficient of filtration rate of juice I saturation according to the standard method was 5.3, and according to the proposed 5.8; sedimentation rate, respectively, 3.7 and 3.0 cm / mi. Thus, the replacement of lime in an amount in excess of 1.5% by weight of the beets does not ensure the achievement of a positive effect on defecation.

Froze Diffusion juice (, 6%) is treated with lime in an amount of 0.3% by weight of beets. Then, two cleaning methods are compared: standard - with the consumption of lime removal and the proposed one with the consumption of defecation 1.0% lime and replacement of 1% lime with an equivalent amount (2%) of limestone treated in the disintegrator, while 0.50% of it is limestone. was administered for pretsefection, and 1.5% for saturation. A comparison of the quality indicators of the juice showed that the content of calcium salts in the purified carbonation juice II is 0.124% CaO according to the standard method, and according to the proposed 0.120% CaO. The color of the juice according to the proposed method decreased by 7.4–8.6%, and the goodness of the juice remained almost unchanged. Thus, the replacement of 1% lime with an equivalent amount of limestone processed in the UDA gives an effect that is almost equal to the effect.

achieved by replacing 1.5% lime to the mass of beets.

When replacing 1.0% lime with diffusion juice cleaning with an equivalent amount (2%) of lime processed in a disintegrator, lime consumption for juice cleaning for a sugar beet plant with a production capacity of 3 thousand tons of beet processing per day and a juice production time of 110 days decreases from 7425 to 4455 t

PRI me R 4. Diffusion juice (, 6%) is treated with lime in an amount of 0.3% by weight of beets. Then, two cleaning methods are compared: tip - with a flow rate, 2.3% of lime for defecation and the proposed one - with a flow of 1.2% for defecation and replacement of 0.8% of lime with an equivalent amount (1.6%) of treated lime disintegrator, while 0.5% of it was injected for pre-defecation, and 1.1% for saturation. A comparison of the quality indicators of juice showed that in juice saturation II, the content of calcium salts in the standard method is 0.092% CaO, and according to the proposed 0.09% CaO. The purity of the juice is respectively 86.4; and 86.5%. The color of the purified juice in the proposed method is lower by 4.4-5.2%. The rate of filtration of juice I carbonation according to the standard method is 5.8, and according to the proposed 5.6; sedimentation rate, respectively 3.6 and 3.9 cm / min. Thus, replacing 0.8% lime with an equivalent amount of lime does not improve the positive effect compared to replacing 1-1.5% lime, but the lime consumption for cleaning the juice increases.

Using the proposed method can significantly reduce the consumption of lime for cleaning the diffusion juice while achieving high technological performance of the purified juice, as well as reduce the cost of the process.

Claims (1)

Invention Formula The method of purification of the sugar-containing solution, including the preliming of calcium hydroxide in the amount of 0.25 0.3% CaO to the mass of beets, the main defecation also calcium hydroxide, I saturation, filtration, TI saturation and filtration, distinguish 51306958, 6 u and with the fact that, in order to increase the type to a particle size of 1-20 microns, effect of purification and reduction in cracking, with this adsorbent being introduced bridges of the purification process, on predef-a also on I saturation in the amount of in the zone with pH 8-8.5, 0.4-1.5-2.6% by weight of the beet is introduced, and the defecation 0.5% by weight of the beet of the adsorbent, in ca. 5 is carried out by the introduction of hydroxide which is used lime, calcium in the amount of 0.8-1.0% CaO to processed in the disintegrator finger-mass of beet.