Concentrated sugarcane juice powder and method for preparing the same using the convection current freeze drying apparatus

• US 10,676,797 B1
• Filed: 08/12/2019
• Issued: 06/09/2020
• Est. Priority Date: 01/27/2019
• Status: Active Grant

• Current Assignee: Vinamit Jsc
• Original Assignee: Vinamit USA LLC
• Inventors: Nguyen, Vien Lam
• Primary Examiner(s): Gravini, Stephen M
• Application Number:
  US16/538,791
• Time in Patent Office: 302 Days
• Field of Search: 34 92, 34284, 34296
• CPC Class Codes: C13B 10/006 Conservation of sugar juices
• CPC Class Codes: C13B 10/025 Treatment of sugar cane before extraction C13B5/00 takes precedence
• CPC Class Codes: C13B 10/06 Sugar-cane crushers
• CPC Class Codes: C13B 20/002 using microorganisms or enzymes
• CPC Class Codes: C13B 50/004 Agglomerated sugar products; Agglomeration

Abstract

A concentrated sugarcane juice powder obtained by a convection current vacuum freeze drying process that includes: selecting and preparing sugarcane stalks by a predetermined quality guideline; extracting sugarcane juice by inserting the sugarcane stalks into a sugarcane juice extracting apparatus having a mesh pattern of micro ridges configured to achieve a maximum extraction efficiency; adding probiotics into the extracted sugarcane juice; freezing the sugarcane juice mixed with the probiotics in molds using an individual quick freezer (IQF) to obtain frozen sugarcane juice blocks; and vacuum freezing said frozen sugarcane juice blocks using a convection current vacuum freeze drying apparatus.

Claims

1. A concentrated sugarcane juice powder obtained by a convection current vacuum freeze drying process, said process comprising the following steps:

(a) selecting and preparing sugarcane stalks by a predetermined quality guideline;

(b) extracting sugarcane juice by inserting said sugarcane stalks into a sugarcane juice extracting apparatus having a mesh pattern of micro ridges configured to achieve a maximum sugarcane juice extraction efficiency;

(c) adding probiotics into said sugarcane juice;

(d) freezing said sugarcane juice mixed with said probiotics in frozen sugarcane juice molds using an individual quick freezer (IQF) to obtain frozen sugarcane juice blocks; and

(e) vacuum freezing said frozen sugarcane juice molds using a convection current vacuum freeze drying apparatus.

2. The concentrated sugarcane juice powder of claim 1 wherein said predetermined quality guideline comprises selecting said sugarcane stalks that have a Brix level of at least 10, and performing visual inspection of said sugarcane stalks that are heavy with solid cores, and free of spoilage spots.

3. The concentrated sugarcane juice powder of claim 1 wherein said probiotics comprises lactobasillus, streptocucus, and bifidobacterium.

4. The sugarcane juice concentrate powder of claim 3 wherein an amount of 0.75 g to 1 g of lactobasillus, streptocucus, and bifidobacterium are added to every 100 g of said sugarcane juice.

5. The sugarcane juice concentrate powder of claim 4 wherein said freezing said sugarcane juice to −

40°

C. to −

35°

C. for 25 minutes to 30 minutes in said frozen sugarcane juice molds using said individual quick freezer (IQF) to form said frozen sugarcane juice blocks.

6. The sugarcane juice concentrated powder of claim 1 wherein said vacuum freezing step further comprises:

loading specific freeze drying settings for sugarcanes from a database into a controller unit;

using said controller unit to cause said convection current vacuum freeze drying apparatus to perform said vacuum freezing step in accordance with said specific freeze drying settings for sugarcanes;

measuring real-time operational parameters from said convection current vacuum freeze drying apparatus during said vacuum freezing step is performed;

comparing said specific freeze drying settings for sugarcanes with said real-time operational parameters to obtain operational differences;

if said operational differences are less than a predetermined error range, continuing said vacuum freezing step until said extracting sugarcane juice step is finished;

otherwise, adjusting said real-time parameters of said convection current vacuum freeze drying apparatus until said differences in operations are less than said predetermined error range;

wherein said convection current vacuum freeze drying apparatus further comprises a dryer chamber unit, a convection current condenser unit comprising a plurality of elongate heat exchange tubes each having fins arranged around an outer circumference of said plurality of elongate heat exchange tubes, a refrigerator unit, a cooling tower unit, a primary vacuum pump unit, and a heater unit.

7. A system for preparing sugarcane juice concentrated powder, comprising:

a sugarcane juice extracting apparatus having a mesh pattern of micro ridges operable to extract a maximum amount of sugarcane juice from sugarcane stalks;

a convection current vacuum freeze drying apparatus comprising;

a dryer chamber unit comprising a plurality of trays for depositing sugarcane juice blocks to be freeze dried;

a convection current condenser unit, mechanically connected to said dryer chamber unit, comprising a plurality of first elongate heat exchange tubes, each of said plurality of first elongate heat exchange tubes having fins arranged around an outer circumference of each of said plurality of first elongate heat exchange tubes, wherein said plurality of first elongate heat exchange tubes substantially fill an internal volume of said convection current condenser unit;

a refrigerator unit mechanically connected to said convection current condenser unit, operable to provide a cold refrigerant gas to said plurality of first elongate heat exchange tubes;

a cooling tower unit mechanically connected to said convection current condenser unit;

a primary vacuum pump unit, mechanically connected to said convection current condenser unit and said cooling tower unit, operable to provide a vacuum pressure to said convection current condenser unit; and

a heater unit mechanically connected to provide a heat energy to both said dryer chamber unit and said convection current condenser unit;

a controller unit; and

a database electrically coupled to communicate with said controller unit, wherein said controller unit is electrically coupled to control and receive sensed operational settings from said dryer chamber unit, said convection current condenser unit, said refrigerator unit, said cooling tower unit, said primary vacuum pump unit, and said heater unit, wherein said database is configured to store predetermined operational settings and wherein said controller unit is operable to compare said sensed operational settings and said predetermined operational settings.

8. The system of claim 7 wherein said sugarcane juice extracting apparatus further comprises:

an input terminal where said sugarcane stalks are inserted therethrough;

a plurality of crushing rollers arranged in a top row and a second row staggered to said top row, wherein an outer surface of each of said plurality of crushing rollers further comprises said mesh pattern of micro ridges;

a receiver basin, disposed below said plurality of crushing rollers, configured to collect said sugarcane juice; and

a rejecting terminal where sugarcane residues are collected.

9. The system of claim 8 wherein said plurality of crushing rollers in said top row are arranged in tandem, wherein said plurality of crushing rollers in said bottom row are also arranged in tandem;

and said top row are seated staggered to said bottom row so that a center of a front crushing roller in said top row and a center of a front crushing roller of said bottom row are offset by a distance of 3 cm to 7 cm and wherein said mesh pattern of micro ridges in said top row are engaged to said mesh pattern of micro ridges in said bottom row so that said plurality of crushing rollers create a drawing force that pulls said sugarcane stalks inward toward said rejecting terminal.

10. The system of claim 9 wherein said mesh pattern of micro ridges comprises a first plurality of ridges arranged from left to right forming an angle of 45 degrees with a central axis of each of said plurality of crushing rollers and a second plurality of ridges arranged from right to left forming an angle of 45 degrees from the central axis of each of said plurality of crushing rollers, and wherein said first plurality of ridges and said second plurality of ridges each having a height of 1.5 mm.

11. The system of claim 7 further comprising a plurality of sensors, wherein said plurality of sensors further comprise thermometers, pressure sensors, timing devices, pumps, valves, and flow meters.

12. The system of claim 11 wherein said plurality of first elongate heat exchange tubes forms a three-dimensional N×

M×

L array of first elongate heat exchange tubes, where N is a number of said plurality of first elongate heat exchange tubes arranged in a first direction and M is a number of said plurality of first elongate heat exchange tubes arranged in a second direction, and each of said plurality of first elongate heat exchange tubes has a length L extended in a third direction, wherein said L, M, and N are non-zero integers.

13. The system of claim 12 wherein each column of said three-dimensional N×

M×

L array comprises vertical zig-zag heat exchange tubes formed by said N of said plurality of first elongate heat exchange tubes.

14. The system of claim 12 wherein each of said vertical zig-zag heat exchange tubes are arranged in a horizontally staggered manner and strung together by first curved connecting tubes which alternatively connect two proximate ends and two distal ends of two adjacent said plurality of first elongate heat exchange tubes so that said vertical zig-zag elongate tubes are configured to receive a cold refrigerant gas from said refrigerator unit via said vertical zig-zag tubes located at the bottom row of said N×

M×

L matrix and to output a warm refrigerant liquid back to said refrigerator unit via said vertical zig-zag tubes located at the bottom row of said N×

M×

L matrix.

15. The system of claim 14 wherein said convection current condenser unit further comprises a three-dimensional M×

N×

L array of a plurality of second elongate tubes without fins, wherein said three-dimensional M×

N×

L array of said plurality of first elongate tubes is fixed on top of said M×

N×

L array of said plurality of second elongate tubes without fins.

16. The system of claim 15 wherein each column of said three-dimensional N×

M×

L array of a plurality of second elongate tubes without fins comprises N of said plurality of second elongate heat exchange tubes without fins arranged in a horizontally staggered manner and strung together by second curved connecting tubes which alternatively connect two consecutive proximate ends and two consecutive distal ends of two adjacent of said plurality of second elongate heat exchange tubes without fins so as to form second vertical zig-zag elongate tubes configured to receive a cold refrigerant gas from said refrigerator unit via said second vertical zig-zag elongate tubes located at the bottom row of said N×

M×

L array and output a warm refrigerant liquid back to said refrigerator unit via said second vertical zig-zag elongate tubes located at the top row of said N×

M×

L array of said three-dimensional N×

M array;

wherein M equals to 8 and N equals to 12 and wherein each of said plurality of second elongate heat exchange tubes has a length of 30 mm, a radius of 35 mm and a thickness of 3.4 mm.

17. The system of claim 16 wherein each of said plurality of first elongate heat exchange tubes further comprises a cylindrical tube and five rectangular fins arranged around an outer circumference of said cylindrical tube, wherein one of said five rectangular fins is located on top of said cylindrical tube and four rectangular fins are arranged on lateral sides of said cylindrical tube pointing downward so as to prevent ice and water from being collected on said cylindrical tube which is made of an aluminum alloy and has a circumference of 89.9 mm, a radius of 35 mm and a thickness of 3.4 mm and wherein said rectangular fin has a width of 30 mm and a length of 30 mm and a thickness of 4 mm.

18. A method for preparing a concentrated sugarcane juice powder comprising the following steps:

(a) selecting and preparing sugarcane stalks by a predetermined quality guideline;

(b) extracting sugarcane juice by inserting said sugarcane stalks into a sugarcane juice extracting apparatus having a mesh pattern of micro ridges;

(c) adding probiotics into said sugarcane juice;

(d) freezing said sugarcane juice in frozen sugarcane juice molds from −

40°

C. to −

35°

C. for 25 minutes to 30 minutes in said frozen sugarcane juice molds using a individual quick freezer (IQF) to form frozen sugarcane juice; and

(e) vacuum freezing said frozen sugarcane juice molds using a convection current vacuum freeze drying apparatus wherein said vacuum freezing step further comprises;

(f) loading specific freeze drying settings for sugarcanes from a database into a controller unit;

(g) using said controller unit to cause said convection current vacuum freeze drying apparatus to perform said vacuum freezing step in accordance with said specific freeze drying settings for sugarcanes;

(h) measuring real-time operational parameters from said convection current vacuum freeze drying apparatus during said vacuum freezing step is performed;

(i) comparing said specific freeze drying settings for sugarcanes with said real-time operational parameters to obtain operational differences;

(j) if said operational differences are less than a predetermined error ranges, continuing said vacuum freezing step until said extracting sugarcane juice step is finished;

otherwise, adjusting said real-time parameters of said convection current vacuum freeze drying apparatus until said differences in operations are less than a predetermined error ranges;

wherein said convection current vacuum freeze drying apparatus further comprises a dryer chamber unit, a convection current condenser unit comprising a plurality of elongate heat exchange tubes each having fins arranged around an outer circumference of said plurality of elongate heat exchange tubes, a refrigerator unit, a cooling tower unit, a primary vacuum pump unit, and a heater unit.

19. The method of claim 18 wherein said predetermined quality guideline comprises selecting said sugarcane stalks that have a Brix level of at least 10, and performing visual inspection of said sugarcane stalks that are heavy with solid cores, and free of spoilage spots.

20. The method of claim 19 wherein an amount of 0.75 g to 1 g of said probiotics comprises lactobasillus, streptocucus, and bifidobacterium are added to every 100 g of said sugarcane juice.