Method for the production of syrup from sugar-containing raw materials

 

(57) Abstract:

The invention relates to the sugar industry. The method involves extraction of the chips with water having a salt content of not more than 30 mg/L. the Ratio of mass of water and chips is 1.1:1-1,5:1. Extraction should be performed within 30-75 min with obtaining the diffusion juice. It is cooled and subjected to ultrafiltration in several stages with the dilution of the concentrate between the specified water at the dilution ratio of 1.1 to 1.7. Mix obtained at each stage of the ultrafiltrates and the mixture is subjected to softening. Then the combined ultrafiltrate concentrated by reverse osmosis, for example, to the content of dry matter (DM) 25-40%, followed by evaporation to ST. 55-70%. The method provides a reduction in losses of sucrose, improving the quality of the syrup and reduce operating costs in the process. 3 C.p. f-crystals, 1 Il.

The invention relates to the sugar industry and can be used to produce syrup from sugar-containing raw materials, such as sugar-beet chips.

A known method of producing syrup from sugar-beet chips, providing for the extraction of sucrose from chip water to form a diffusion juice, cleansing it by Oceania syrup solids content of 60-65% with subsequent purification and filtration, then he comes to the cooking of the first massecuite (East A. I., Lepeshkin I. P. Sugar beet production. - M.: Food industry, 1973, S. 42).

The above method, although widespread, has a number of disadvantages.

The high content of ionic impurities in the water (up to 400-600 mg/l) reduces the rate of extraction of sucrose from the chip, and hence the output of sugar. To obtain milk of lime and saturation gas requires energy-intensive process of calcining limestone. Lime clear juice from macromolecular compounds (IUDs), colloids and other nasarov leads to the formation of large amounts of waste, as well as to substantial saturation of the juice ions stiffness, which is not completely removed in the process of two-stage saturation, which complicates the process of evaporation of the juice due to the heavy scale formation on the heating surfaces.

The closest technical solution to the invention is a method comprising the extraction of sucrose from strands of sugar-containing raw water with a salt content of not more than 30 mg/l, within 90-120 minutes of obtaining the diffusion juice, its cooling, the ultrafiltration in several stages, with razvalini and this is obtained at the stages of the ultrafiltrates mix, then the combined ultrafiltrate magchat and concentrated by the reverse osmosis method to obtain a syrup with DM contents of 30-50% and a filtrate having a salt content of not more than 30 mg/l, and then using it in the process of extraction and ultrafiltration (Patent of the Russian Federation 2118664, C 13 D 3/16, for the invention "method for the production of syrup from sugar-containing raw materials").

The disadvantages of this method are as follows. The extraction process is conducted in such a way that the resulting pulp contains a large amount of sucrose in the diffusion juice from the chip goes much nasarov: hydrocompaction, Navy, acids and others. As a consequence, for example, in sugar beet production, loss of sucrose in bagasse reach 0.3 to 0.5% by weight of beet and diffusion juice purity is 85-86%.

Low quality juice causes a greater dilution before ultrafiltration juice and formed at each stage concentrates, resulting in the United ultrafiltrate low DM contents of~ 2.4 percent, for thickening which requires more expensive reverse osmosis units and significant operating costs. In addition to the x-and energy-intensive installations, that increases the cost of this operation compared to the thickening of this juice by evaporation.

The technical result of the invention is to reduce losses of sucrose in the beet pulp, improving the quality of diffusion juice and syrup and reducing the cost of thickening of the United ultrafiltrate.

This is due to the fact that in the proposed method of production of the syrup provides for the extraction of crushed sugar-containing raw water with a salt content of not more than 30 mg/l with obtaining diffusion juice, its cooling, the ultrafiltration in several stages with the dilution of the concentrate between the specified water, mixing the resulting at each stage of ultrafiltrates, softening the United ultrafiltrate and its concentration by reverse osmosis, the extraction is carried out at a ratio of mass of water and raw chips 1,1:1-1,5:1 within 30-75 min and the process of ultrafiltration is carried out with dilution ratio of concentrate to 1.1 to 1.7.

Softened ultrafiltrate is advisable to discolor by ion exchange on the anion exchange resin or activated carbon adsorption. Thickening of the United ultrafiltrate reverse osmosis should be conducted to ST. 25-40%, then Poluchenie.

The proposed method is illustrated in flow diagram shown in the drawing, and consists in the following.

From the tank 1 take water with a salt content of not more than 30 mg/l by installing the regulation of pH 2 pH water brought to a level of 5.5-6.5 and then served in the extractor 3. In the extractor prototechno water serves chips sugar-containing raw materials. The extraction was carried out under the following conditions: a temperature of 60-75oWith, the mass ratio of water and shavings of 1.1:1-1,5: 1, the duration of the process 30-75 minutes Under these conditions, the loss of sucrose in bagasse reduced to 0.1 to 0.2% by weight of sugar-containing raw materials, reduced transition in diffusion juice nasarov: hydrocompaction, proteins, fats and other substances and, consequently, get the juice purity 88-90% and DM contents of 11-14%.

Resulting in the extraction process the pulp away from the extractor, compressed and used as feed for animals. Formed during pressing of the pulp pulp press station clean water thermal or chemical or other known method, and return, for example, to dilute the concentrate on stage ultrafiltration.

Obtained in the extraction process of diffusion juice cooling the bone 6. After filling capacity 6 flow diffusion juice switch capacity 7.

From the filled containers 6 juice sent to the UF plant 8, in which the use of a membrane permeable to water, sucrose, low-molecular compounds and delaying the Navy, pectins and colloids and some other Asahara. The ultrafiltration is carried out in several stages. At each stage produces two products: the ultrafiltrate and concentrate. Ultrafiltrate from all stages divert and collect in a container 9, and concentrate with every stage of the return into the tank 6.

After the first stage ultrafiltration remaining in the tank 6, the concentrate is diluted with 1.1-1.7 times the water from the tank 1 or the purified pulp press station with water, pH of which was adjusted to the level 8-11 using the installation regulation of pH 10. The diluted concentrate is subjected to a second, optionally third and fourth stages of ultrafiltration, with dilution of the resulting concentrate of the above.

The result of the United ultrafiltrate with DM contents of 8-11% and a purity of 90 to 92%.

After the last stage ultrafiltration installation 8 switch on the river is the addition of the resulting concentrate.

Remaining in the tank 6, the concentrate is drained and sent for further processing, and in the released capacity 6 again collect the diffusion juice.

After ultrafiltration of the juice from the tank 7 install 8 again switches to work with a capacity of 6, and so on

The concentrate after the last stage of ultrafiltration has the purity of 20-25% and contains 8-12% ST. Solids in the concentrate on 95-97% composed of pectins, proteins, and other Navy and not sugars. In this regard, the concentrate is used as a protein feed for animals immediately or after additional processing. Concentrate also produce valuable components, such as pectin.

United ultrafiltrate from the tank 9 guide for softening installation 11 loaded cation exchange resin in the sodium or potassium form. Regeneration of the cation exchanger was carried out with a solution of sodium or potassium salt. When regeneration obtain solutions containing desorbed salt. Regenerative solutions used for the production of valuable components, such as magnesium chloride.

Softened ultrafiltrate sent for discoloration in the column 12, filled with anion exchange resin in chloro-form, or activated carbon. Degeneratiaaaaa desorbed Asahara, used to produce valuable components, such as citric, malic acids and other compounds. Regeneration of coal is carried out after discharge thermal or thermochemical methods.

Discolored ultrafiltrate served on concentration, which should be carried out in two stages. The first stage is carried out on a reverse osmosis system 13 with getting polyurea with a DM content of 25-40% and filtrate, representing water with a salt content of not more than 30 mg/l, in which the sucrose is present in trace amounts.

The filtrate is collected in a container 1, and used for regeneration of the cation exchangers, anion exchangers and other needs of the enterprise.

The resulting Polukarov collected in the tank 14, where served on evaporating the installation of 15, where they perform the final concentration to a syrup with DM contents of 55-70%. The finished syrup is the purity of 92-95% and the chromaticity 10-15 conventional units of optical density. It is collected and stored in the tank 16. The syrup obtained from neobespechenija ultrafiltrate, has a purity of 90 to 92% and the chromaticity of 150 to 200 conventional units of optical density.

Column discoloration 13 can be set and after the evaporator (drawing does not p is receiving sucrose 17.1% in the amount of 10 kg/h Prototechno chips served water with a salt content of not more than 30 mg/l, pH of 5.9. Water consumption 12 kg/h Mass ratio of the extractant and the chip is 1.2:1, which provides the average difference between the concentration of sucrose in the head and the tail of the extractor 3.6 per cent. The temperature of extraction 70oWith the duration of 60 minutes

From the extractor taken diffusion juice in the amount of 15 kg/h Get the juice with the following indicators: ST. 12,84%, the sucrose content of 11.3%, a purity of 88%. Loss of sucrose in bagasse 0.2% by weight of beets. The juice is cooled to a temperature of 25oWith and then cleaned of sediment on the mechanical filter with a threshold detention 50 microns.

Trying to enter in the capacity of 15 kg of diffusion juice with the current settings listed above. From the tank the juice is fed to the UF plant, which use a membrane with a cutoff molecular weight of 20 thousand daltons. Ultrafiltrate from the installation (with the first and subsequent stages of ultrafiltration) away and collected in a separate container. The first stage is carried out before until in the tank remains 3.1 kg of concentrate.

The concentrate is diluted 1.35 times the water with a salt content of not more than 30 mg/l and pH 8.8. Then spend the second stage ultra the times specified above water. Then spend the third stage of ultrafiltration. Its complete, when in the tank remains 0.9 kg of concentrate, which is diluted with 1.7 times. Then spend the last fourth stage ultrafiltration, which stop when the residual mass of 0.8 kg concentrate

The concentrate from the last stage has the following characteristics: the DM content is 12%, the purity of 21.7%. Loss of sucrose in the concentrate of 0.2% by weight of beets.

United ultrafiltrate in the amount of 16.7 kg has the following characteristics: the DM content is 11%, sucrose 10%, the purity of 90,9%.

United ultrafiltrate magchat on ion-exchange type resin KU-2-8 in the sodium form, to the stiffness of 0.1 mEq/L. Softened ultrafiltrate is directed to discoloration, which is performed on ion-exchange resin type AB-17 in chloro-form. Discolored ultrafiltrate has the following parameters: DM content of 10.75%, sucrose 10%, purity 93.1% of the chromaticity 6 conventional units of optical density. Loss of sucrose in the process of softening and discoloration (during regeneration of the resin) amount of 0.05% by weight of beets.

Softened, discolored ultrafiltrate in the amount of 16.7 kg served on the pre-concentration is 0 ATM. Select 11,1 kg of the filtrate, the weight of the original ultrafiltrate decreases to 5.6 kg

The resulting Polukarov has the following characteristics: the content of ST 31.9% of sucrose 29,95%, purity 93.1% of the chromaticity 6 conventional units of optical density. The filtrate reverse osmosis sucrose is present in trace amounts.

Polukarov then evaporated to a syrup by evaporation vacuum installation at a temperature of ~120oC. Get the syrup with the following indicators: the DM content is 60%, sucrose 55,8%, purity 93%, chromaticity 15 standard units of optical density.

In the process of evaporation above polyurea on the surfaces does not scale formation. Total energy consumption by thickening ultrafiltrate reverse osmosis and evaporation are reduced by ~10-15%.

Thus, the proposed method reduces the loss of sucrose in the beet pulp, improving the quality of the syrup and reduce energy costs for its production.

1. Method for the production of syrup from sugar-containing raw materials, involving the extraction of raw chips water with a salt content of not more than 30 mg/l with obtaining diffusion juice, its cooling, ultrane each stage of ultrafiltrates the softening of the United ultrafiltrate and its concentration by reverse osmosis, characterized in that the extraction is carried out at a ratio of mass of water and raw chips 1,1: 1-1,5: 1 within 30-75 min, while the process of ultrafiltration is carried out with dilution ratio of concentrate to 1.1 to 1.7.

2. The method according to p. 1, characterized in that the thickening softened ultrafiltrate reverse osmosis is carried out until the dry matter content of 25-40%, then the received Polukarov evaporated to syrup solids content 55-70%.

3. The method according to p. 1, characterized in that softened ultrafiltrate before thickening reverse osmosis discolor by ion exchange on the anion exchange resin or activated carbon adsorption.

4. The method according to p. 1, characterized in that the obtained syrup discolor by ion exchange on the anion exchange resin or activated carbon adsorption.

 

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FIELD: sugar industry.

SUBSTANCE: method involves producing juice by macerating sugar beet or pieces of sugar beet or by extracting beet chips at temperature of at least 65°C; subjecting resultant juice to two-staged ultrafiltering through membranes having different interception threshold as to molecular weight; subjecting ultrafiltration second-stage permeate to nanofiltration through nanofiltering membrane to produce permeate and retentate having higher saccharose concentration as to dry substance than basic juice; concentrating said retentate for producing of sugar-containing syrup.

EFFECT: increased yield of product.

18 cl, 28 ex, 15 tbl, 6 dwg

FIELD: sugar industry in particular production of extracting liquid for diffusion apparatus.

SUBSTANCE: claimed method includes water filtration to remove fiber; alkalizing thereof with lime up to pH 9.5-10.0 and treatment with electrical field of alternating current with strength of 100-200 V/m for 1-2 min to form precipitate of high molecular substances. Then precipitate is removed from water by using membrane made of high porous ceramic material comprising quartz fiber of 70-80 % porosity up to accumulation of precipitate layer on its surface.

EFFECT: method of increased effectiveness; extracting liquid of improved quality.

1 ex, 1 tbl

FIELD: food industry.

SUBSTANCE: line for production of liquid sugar of sugar-containing raw material storage products includes a unit for raw material preparation, a membrane filtration unit, an electrodialysis unit, a fine purification unit, a reverse osmosis concentration unit, a graduation unit, a chemical flushing system, a water treatment plant, a heating engineering contour system. The method for production of liquid sugar of sorghum honey or crude sugar includes diluting sorghum honey or crude sugar in permeate, mixing and heating in the unit for raw material preparation with a filtrate production, filtrate purification in the membrane filtration unit, filtrate treatment in the electrodialysis unit, advanced treatment in the fine purification unit, sugars solution concentration in the reverse osmosis concentration unit and graduation of the sugar-containing solution in the graduation unit. The method for production of liquid sugar of sorghum sap includes sap production, mixing in the unit for raw material preparation with a filtrate preparation, filtrate elutriation in a precipitator tank, filtrate purification in the membrane filtration unit, filtrate treatment in the electrodialysis unit, advanced treatment in the fine purification unit, sugars solution concentration in the reverse osmosis concentration unit and graduation of the sugar-containing solution in the graduation unit.

EFFECT: invention allows to increase liquid sugar yield of sugar-containing raw material and to reduce its losses during production.

30 cl, 3 dwg, 3 ex

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