CN112827208A - Fructose crystallization equipment and method thereof - Google Patents

Abstract

The invention provides fructose crystallization equipment and a method thereof, and mainly relates to the technical field of fructose crystallization equipment. The fructose crystallization equipment comprises a tank body, a bottom frame and a temperature circulation controller, wherein the tank body is arranged on the upper portion of the bottom frame, the temperature circulation controller is arranged on one side of a jacket, a stirring motor is arranged on the top surface of the tank body, and a rotating shaft of the stirring motor penetrates through the top surface of the tank body. The invention has the beneficial effects that: the invention can be combined in multiple stages to form multi-stage control on fructose syrup, has high temperature control precision, more precise temperature control, more three-dimensional temperature control and more uniform stirring, is suitable for crystallization and transportation of high-viscosity materials with high dry substances, is more convenient for cleaning and sterilization of equipment, is convenient for multi-stage connection, graded temperature control and graded high-temperature sterilization, is convenient for uniform dispersion of materials, is beneficial to generation and increase of crystals, does not damage crystal structures, and ensures that the crystallization process of crystallized fructose in the fructose syrup is more efficient.

Description

Fructose crystallization equipment and method thereof

Technical Field

The invention mainly relates to the technical field of fructose crystallization equipment, in particular to fructose crystallization equipment and a method thereof.

Background

Fructose, a sugar naturally occurring in nature, has superior characteristics of unique high sweetness, low GI value (glycemic index), insulin-independent metabolism, superior food moisturizing performance and the like, and is increasingly used in the lives of people, widely applied in the medical field and popular with the market and the people. The crystalline fructose has higher purity, no other impurity sugar, low GI value and more excellent moisture retention.

Fructose as a natural grain invert sugar is prepared by converting starch into pure glucose, then converting the pure glucose into a resultant sugar solution by a high-efficiency isomerization technology, and further performing extraction, concentration and crystallization, separation and drying by special equipment through an integrated technology, particularly in the aspect of a crystallization extraction technology, particularly, the fructose crystallization equipment and the process thereof have large influence on the product quality, but related advanced technical equipment and processes have no precedent which can be followed.

Because the high-purity fructose syrup has ultrahigh viscosity and high hygroscopicity, the transfer of high-concentration fructose syrup materials in production is very difficult, particularly, the generation control of crystals is very complicated, the cleaning is also very complicated, special technical equipment and a process suitable for fructose crystallization are still lacked in the market at present, and the production, technical progress and popularization of the crystallized fructose are greatly influenced.

Disclosure of Invention

The fructose crystallization equipment and the method thereof can be combined in multiple stages to form multi-stage control on fructose syrup, are high in temperature control precision, more precise in temperature control, more three-dimensional in temperature control and more uniform in stirring, are suitable for crystallization and transportation of high-dry substance and high-viscosity materials, are more convenient for cleaning and sterilization of the equipment, are convenient for multi-stage connection, hierarchical temperature control and hierarchical high-temperature sterilization, are convenient for uniform dispersion of the materials, are beneficial to generation and increase of crystals, do not damage crystal structures, and enable the crystallization process of crystallized fructose in the fructose syrup to be more efficient.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a fructose crystallization device comprises a tank body, an underframe and a temperature cycle controller, wherein the tank body is arranged on the upper part of the underframe, a stirring motor is arranged on the top surface of the tank body, a rotating shaft of the stirring motor penetrates through the top surface of the tank body, a stirring shaft is arranged on the bottom surface of the rotating shaft of the stirring motor, a plurality of blades are uniformly arranged on two sides of the stirring shaft, a jacket is arranged on the periphery of the upper part of the tank body, a connecting pipe is arranged on the jacket, the temperature cycle controller is connected with the jacket through the connecting pipe, a placing bin is arranged on one side of the lower part of the tank body, the cross section of one side of the placing bin is in an oblique L shape, a supporting plate is arranged on the other side of the placing bin, a door opening is arranged on the supporting plate, a steam pipe is arranged on the, the material pipeline is changeed in the installation of jar body lower part opposite side, change the material pipeline and go up the installation and change the material valve, the manhole is seted up at jar body one side middle part, jar body bottom is equipped with pushes away the feed bin, place the interior installation of storehouse and push away the material motor, push away material motor pivot one end installation connecting axle, connecting axle one end runs through the body and is located the jar internally, connecting axle one end installation auger, the auger is located pushes away the feed bin.

Furthermore, a feed inlet is formed in one side of the top surface of the tank body.

Further, the temperature cycle controller is a 501A type super thermostat, and the precision of the temperature cycle controller is 0.1 ℃.

Furthermore, the bottom of the tank body is provided with a lower row of pipelines, the top end of the lower row of pipelines is communicated with the pushing bin, and the periphery of the bottom end of the lower row of pipelines is provided with a lower row of valves.

Further, the inner wall of the tank body is provided with a coil pipe.

A method for crystallizing fructose comprises the following steps:

the method comprises the following steps: purifying and evaporating, namely decoloring the high-purity fructose syrup by using active carbon, carrying out ion exchange and evaporative concentration to obtain purified concentrated fructose syrup, and evaporating and discharging by using an evaporator to control the content of dry matters of the fructose syrup to be more than 86.0 percent and controlling the temperature to be 80 +/-1 ℃;

step two: a preparation stage, connecting crystallization equipment step by step, conveying concentrated fructose syrup into the 1 st-stage crystallization equipment, accurately controlling the temperature of purified concentrated fructose syrup to 75 +/-0.5 ℃ within a period of 3 hours, controlling the temperature of purified concentrated fructose syrup to 36-40 ℃ within a period of 6-10 hours within the 2 nd-stage crystallization equipment, continuously stabilizing the temperature for 2-3 hours after the material temperature is stabilized to 36-40 ℃, and keeping the stirring speed of 100-1000 rpm/min for mixing;

step three: crystal growing and finishing, namely conveying the concentrated fructose syrup to a grade 3 crystallization device, keeping the temperature at 45-46 ℃ within 1 hour, adding fructose crystal seeds according to the inoculation amount of 0-2.0%, fully stirring and uniformly dispersing, and keeping the temperature at 45 +/-0.2 ℃ for 3-6 hours after inoculating the crystal seeds;

step four: carrying out curve-variable cooling, namely conveying the concentrated fructose syrup into 4-level crystallization equipment, keeping the temperature at 45 ℃, keeping the stirring state at 10-50rpm/min, stirring, timing, cooling to the material end point by 30 ℃ according to the cooling rate of reducing the temperature range from 0.2 ℃ to 0.5 ℃ per hour, and prolonging the crystal growth time for 30-75 hours;

step five: separating, detecting the content of crystals to be 31-60% under the condition of keeping the temperature at 30 ℃ and keeping the temperature, conveying the crystals to a feed inlet of a centrifuge through a pipeline with an outer layer covered with a jacket, starting the centrifuge to separate the crystals and the mother liquor in the crystallized material at a separation speed of more than 5000rpm/min, and collecting the crystals and the mother liquor respectively;

step six: drying, drying with fluidized bed air flow drying or sand-dragon air flow drying at 70-105 deg.C until the water content is 6-11%, collecting granular or powder crystalline fructose, and packaging.

Further, the fructose solution is a fructose-containing solution obtained by glucose isomerization, and the fructose content in the fructose solution is more than 89%.

Compared with the prior art, the invention has the beneficial effects that:

the invention can be combined in multiple stages to form multi-stage control on fructose syrup, has high temperature control precision, more precise temperature control, more three-dimensional temperature control, more uniform stirring, small temperature jump in the crystal maintenance stage, optimal crystallization effect on the self-generated crystal, better uniform dispersion degree in the crystal particle syrup, suitability for crystallization and transportation of high-dry substance and high-viscosity material, more convenience for self cleaning and sterilization of equipment, convenience for multi-stage connection, hierarchical temperature control and hierarchical high-temperature sterilization, convenience for uniform dispersion of the material, contribution to generation and enlargement of the crystal, no damage to the crystal structure, more efficient crystallization process of crystallized fructose in the fructose syrup, fuller and more uniform fructose particles, efficient and thorough fructose crystallization without pollution, high product content purity, crystalline or powdery product and better flavor of the product.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of a two-stage connection of the present invention;

reference numerals shown in the drawings: 1. a tank body; 2. a chassis; 3. a temperature cycle controller; 4. a stirring motor; 5. a stirring shaft; 6. a blade; 7. a jacket; 8. a steam pipe; 9. an air nozzle; 10. a steam valve; 11. a material transferring pipeline; 12. a material transferring valve; 13. a manhole; 14. a feed inlet; 15. a material pushing motor; 16. a packing auger; 17. a lower row of pipelines; 18. a lower discharge valve; 19. a coil pipe; 20. a connecting shaft; 21. and a support plate.

Detailed Description

The invention is further described with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.

As shown in figures 1-2, the fructose crystallization equipment and the method thereof comprise a tank body 1, a bottom frame 2 and a temperature cycle controller 3, wherein the tank body 1 is arranged at the upper part of the bottom frame 2, a stirring motor 4 is arranged at the top surface of the tank body 1, a rotating shaft of the stirring motor 4 penetrates through the top surface of the tank body 1, a stirring shaft 5 is arranged at the bottom surface of the rotating shaft of the stirring motor 4, a plurality of blades 6 are uniformly arranged at two sides of the stirring shaft 4, a jacket 7 is arranged at the periphery of the upper part of the tank body 1, a connecting pipe is arranged on the jacket 7, the temperature cycle controller 3 is connected with the jacket 7 through the connecting pipe, a bin is arranged at one side of the lower part of the tank body 1, the cross section of one side of the bin is in an oblique L shape, a support plate 21 is arranged at the other side of the bin, a door, install several evenly distributed's air nozzle 9 on the steam pipe 8, 8 side-mounting steam valve 10 of steam pipe, the material pipeline 11 is changeed in the installation of 1 lower part opposite side of the jar body, change the material pipeline 11 and go up the installation and change material valve 12, manhole 13 is seted up at 1 one side middle part of the jar body, 1 bottom of the jar body is equipped with pushes away the feed bin, place the interior installation of storehouse and push away material motor 15, push away material motor 15 pivot one end installation connecting axle 20, connecting axle 20 one end runs through body 1 and is located jar body 1, connecting axle 20 one end installation auger 16, auger 16 is located pushes away the feed bin.

Specifically, a feed inlet 14 is formed in one side of the top surface of the tank body 1. Through the feed opening 14, incoming material can be added into the tank body 1.

Specifically, the temperature cycle controller 3 is a 501A type super thermostat, and the precision of the temperature cycle controller 3 is 0.1 ℃. The temperature circulation controller 3 can accurately control the output and the backflow of the temperature of the input liquid. Refer to the new model.

Specifically, a lower row of pipelines 17 is arranged at the bottom of the tank body 1, the top end of the lower row of pipelines 17 is communicated with the pushing bin, and a lower row of valves 18 is arranged on the periphery of the bottom end of the lower row of pipelines 17. Through setting up row's pipeline 17 and lower row of valve 18, can discharge the waste material that needs to be got rid of because of washing etc. in jar body 1, get rid of waste water etc..

Specifically, a coil 19 is arranged on the inner wall of the tank body 1. The coil 19 can uniformly cool or heat the inside of the tank 1.

Example 1:

purifying and evaporating, namely decoloring the high-purity fructose syrup by using active carbon, performing ion exchange and evaporation concentration to obtain purified concentrated fructose syrup, and discharging by using an evaporator in an evaporation manner to control the content of dry matters of the fructose syrup to be more than 86.0 percent and control the temperature to be 79 ℃;

the preparation stage, connecting the crystallization equipment step by step, conveying the concentrated fructose syrup into the 1 st-stage crystallization equipment, accurately controlling the temperature of the purified concentrated fructose syrup to 74.5 ℃ within a period of 3 hours, controlling the temperature of the purified concentrated fructose syrup to 36 ℃ within a period of 6 hours within the 2 nd-stage crystallization equipment, continuously stabilizing the temperature for 2 hours after the material temperature is stabilized to 36 ℃, and keeping the stirring speed of 750rpm/min for mixing;

crystal growing and finishing, namely conveying the concentrated fructose syrup to a 3 rd-level crystallization device, keeping the temperature at 45 ℃ within 1 hour, adding fructose crystal seeds according to the inoculation amount of 0-2.0%, fully stirring and uniformly dispersing, and keeping the temperature at 44.2 ℃ for 3 hours after inoculating the crystal seeds;

carrying out curve-variable cooling, namely conveying the concentrated fructose syrup into 4-level crystallization equipment, keeping the temperature at 45 ℃, keeping the stirring state at 25rpm/min, stirring, timing, cooling to the material end point by 30 ℃ according to the cooling rate of reducing the temperature range from 0.2 ℃ to 0.5 ℃ per hour, and prolonging the crystal growth time for 55 hours;

separating, detecting the content of crystals under the condition of keeping the temperature of 30 ℃ and accompanying the temperature, conveying the crystals to a feed inlet of a centrifuge through a pipeline with an outer layer covered with a jacket, starting the centrifuge to separate the crystals and the mother liquor in the crystallized materials at a separation rotating speed of more than 5000rpm/min, and respectively collecting the crystals and the mother liquor;

drying, drying with fluidized bed air flow drying or sand-dragon air flow drying at 85 deg.C until water content reaches 8%, collecting granular or powder crystalline fructose, and packaging.

Example 2:

purifying and evaporating, namely decoloring the high-purity fructose syrup by using active carbon, performing ion exchange and evaporation concentration to obtain purified concentrated fructose syrup, and evaporating and discharging by using an evaporator to control the content of dry matters of the fructose syrup to be more than 86.0 percent and controlling the temperature to be 81 ℃;

a preparation stage, connecting crystallization equipment step by step, conveying the concentrated fructose syrup into the 1 st-stage crystallization equipment, accurately controlling the temperature of the purified concentrated fructose syrup to 75.5 ℃ within a period of 3 hours, controlling the temperature of the purified concentrated fructose syrup to 40 ℃ within a period of 10 hours within the 2 nd-stage crystallization equipment, continuously stabilizing the temperature for 3 hours after the temperature of the materials is stabilized to 40 ℃, and keeping the stirring speed for mixing at 1000 rpm/min;

crystal growing and finishing, namely conveying the concentrated fructose syrup to a 3 rd-level crystallization device, keeping the temperature at 46 ℃ within 1 hour, adding fructose crystal seeds according to the inoculation amount of 0-2.0%, fully stirring and uniformly dispersing, and keeping the temperature at 45.2 ℃ for 6 hours after inoculating the crystal seeds;

carrying out curve-variable cooling, namely conveying the concentrated fructose syrup into 4-level crystallization equipment, keeping the temperature at 45 ℃, keeping the stirring state at 50rpm/min, stirring, timing, cooling to the material end point by 30 ℃ according to the cooling rate of reducing the temperature range from 0.2 ℃ to 0.5 ℃ per hour, and prolonging the crystal growth time for 75 hours;

separating, detecting the content of crystals to be 31-60% under the condition of keeping the temperature at 30 ℃ and keeping the temperature, conveying the crystals to a feed inlet of a centrifuge through a pipeline with an outer layer covered with a jacket, starting the centrifuge to separate the crystals and the mother liquor in the crystallized material at a separation speed of more than 5000rpm/min, and collecting the crystals and the mother liquor respectively;

drying, drying with fluidized bed air flow drying or sand-dragon air flow drying at 105 deg.C until the water content is 6-11%, collecting granular or powder crystalline fructose, and packaging.

Example 3:

the temperature time change of the variable curve cooling is that the material temperature is finely controlled according to the change shown in the following table after the seed crystal cultivation and preparation stage is timed, the temperature control in the crystal cultivation and preparation stage is divided into 7 stages of equipment which are connected in series from top to bottom according to the height to realize the temperature subsection fine control, the fructose crystal particles after the 7 th stage of crystallization are discharged out of the tank, and the other steps are the same as the steps in the embodiment 2.

And (3) detecting the performance of fructose:

example 1 product performance record table:

fructose content (dry matter, liquid chromatography)%	99.7
		Acidity (milliliters of 0.02mol/L NaOH consumed to neutralize 5g of sample) ml	0.05
5-carboxymethyl furfural (dry matter)%	0.003
		Water insoluble impurity mg/kg	10
Chloride%	0.0002
		Total arsenic (As) mg/kg	0.0003
Lead (in terms of Pb) mg/kg	0.0001

TABLE 1

Example 2 product performance record table:

fructose content (dry matter, liquid chromatography)%	99.8
		Acidity (milliliters of 0.02mol/L NaOH consumed to neutralize 5g of sample) ml	0.06
5-carboxymethyl furfural (dry matter)%	0.002
		Water insoluble impurity mg/kg	8
Chloride%	0.0001
		Appearance of the product	White crystalline powder
Smell(s)	Specific sweet taste of fructose

TABLE 2

Example 3 product performance record table:

fructose content (dry matter, liquid chromatography)%	99.8
		Acidity (milliliters of 0.02mol/L NaOH consumed to neutralize 5g of sample) ml	0.04
5-carboxymethyl furfural (dry matter)%	0.0005
		Water insoluble impurity mg/kg	5
Chloride%	0.0001
		Loss on drying%	0.35
Ash content of sulfuric acid%	0.001
		Appearance of the product	White crystalline particles
Smell(s)	Specific sweet taste of fructose

TABLE 3

The invention can be combined in multiple stages to form multi-stage control on fructose syrup, has high temperature control precision, more precise temperature control, more three-dimensional temperature control, more uniform stirring, small temperature jump in the crystal maintenance stage, optimal crystallization effect on the self-generated crystal, better uniform dispersion degree in the crystal particle syrup, suitability for crystallization and transportation of high-dry substance and high-viscosity material, more convenience for cleaning and sterilization of equipment, convenience for multi-stage connection, hierarchical temperature control and hierarchical high-temperature sterilization, convenience for uniform dispersion of the material, contribution to generation and increase of the crystal, no damage to the crystal structure and more efficient crystallization process of crystallized fructose in the fructose syrup.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or the corresponding scaling up or down may be performed or some of the technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (7)

1. The utility model provides a fructose crystallization equipment, includes jar body (1), chassis (2) and temperature cycle controller (3), its characterized in that: the tank body (1) is arranged on the upper portion of the bottom frame (2), a stirring motor (4) is arranged on the top surface of the tank body (1), a rotating shaft of the stirring motor (4) penetrates through the top surface of the tank body (1), a stirring shaft (5) is arranged on the bottom surface of the rotating shaft of the stirring motor (4), a plurality of blades (6) are uniformly arranged on two sides of the stirring shaft (4), a jacket (7) is arranged on the periphery of the upper portion of the tank body (1), a connecting pipe is arranged on the jacket (7), the temperature circulation controller (3) is connected with the jacket (7) through the connecting pipe, a placing bin is arranged on one side of the lower portion of the tank body (1), the cross section of one side of the placing bin is in an oblique L shape, a supporting plate (21) is arranged on the other side of the placing bin, a door hole is formed in the supporting plate (, install several evenly distributed's air nozzle (9) on steam pipe (8), steam pipe (8) side-mounting steam valve (10), material pipeline (11) are changeed in the installation of the jar body (1) lower part opposite side, change and install material valve (12) of changeing on material pipeline (11), manhole (13) are seted up at the middle part of the jar body (1) one side, the jar body (1) bottom is equipped with pushes away the feed bin, place the interior installation of storehouse and push away material motor (15), push away material motor (15) pivot one end installation connecting axle (20), connecting axle (20) one end runs through body (1) and is located the jar body (1), connecting axle (20) one end installation auger (16), auger (16) are located and push away the feed bin.

2. The fructose crystallization apparatus according to claim 1, wherein: a feed inlet (14) is formed in one side of the top surface of the tank body (1).

3. The fructose crystallization apparatus according to claim 1, wherein: the temperature circulation controller (3) is a 501A type super thermostat, and the precision of the temperature circulation controller (3) is 0.1 ℃.

4. The fructose crystallization apparatus according to claim 1, wherein: the tank body (1) bottom installation is arranged and is arranged pipeline (17) down, arrange pipeline (17) top and push away the feed bin intercommunication down, arrange pipeline (17) bottom periphery down and install down valve (18).

5. The fructose crystallization apparatus according to claim 1, wherein: the inner wall of the tank body (1) is provided with a coil (19).

6. A method for crystallizing fructose, characterized by: the method comprises the following steps:

the method comprises the following steps: purifying and evaporating, namely decoloring the high-purity fructose syrup by using active carbon, carrying out ion exchange and evaporative concentration to obtain purified concentrated fructose syrup, and evaporating and discharging by using an evaporator to control the content of dry matters of the fructose syrup to be more than 86.0 percent and controlling the temperature to be 80 +/-1 ℃;

step two: a preparation stage, connecting crystallization equipment step by step, conveying concentrated fructose syrup into the 1 st-stage crystallization equipment, accurately controlling the temperature of purified concentrated fructose syrup to 75 +/-0.5 ℃ within a period of 3 hours, controlling the temperature of purified concentrated fructose syrup to 36-40 ℃ within a period of 6-10 hours within the 2 nd-stage crystallization equipment, continuously stabilizing the temperature for 2-3 hours after the material temperature is stabilized to 36-40 ℃, and keeping the stirring speed of 100-1000 rpm/min for mixing;

step three: crystal growing and finishing, namely conveying the concentrated fructose syrup to a grade 3 crystallization device, keeping the temperature at 45-46 ℃ within 1 hour, adding fructose crystal seeds according to the inoculation amount of 0-2.0%, fully stirring and uniformly dispersing, and keeping the temperature at 45 +/-0.2 ℃ for 3-6 hours after inoculating the crystal seeds;

step four: carrying out curve-variable cooling, namely conveying the concentrated fructose syrup into 4-level crystallization equipment, keeping the temperature at 45 ℃, keeping the stirring state at 10-50rpm/min, stirring, timing, cooling to the material end point by 30 ℃ according to the cooling rate of reducing the temperature range from 0.2 ℃ to 0.5 ℃ per hour, and prolonging the crystal growth time for 30-75 hours;

step five: separating, detecting the content of crystals to be 31-60% under the condition of keeping the temperature at 30 ℃ and keeping the temperature, conveying the crystals to a feed inlet of a centrifuge through a pipeline with an outer layer covered with a jacket, starting the centrifuge to separate the crystals and the mother liquor in the crystallized material at a separation speed of more than 5000rpm/min, and collecting the crystals and the mother liquor respectively;

step six: drying, drying with fluidized bed air flow drying or sand-dragon air flow drying at 70-105 deg.C until the water content is 6-11%, collecting granular or powder crystalline fructose, and packaging.

7. The method for crystallizing fructose of claim 6, wherein: the fructose solution is a fructose-containing solution obtained by glucose isomerization, and the fructose content in the fructose solution is more than 89%.

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