CN114568609A

CN114568609A - Processing equipment and preparation method of cold-pressed fresh corn juice beverage

Info

Publication number: CN114568609A
Application number: CN202111417336.4A
Authority: CN
Inventors: 蔡水埼; 傅苏芳; 陈丙宇; 吴国美
Original assignee: Anji Zuming Soy Food Co ltd
Current assignee: Anji Zuming Soy Food Co ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-06-03

Abstract

The invention relates to the field of food processing, and discloses processing equipment and a preparation method of cold-pressed fresh corn juice beverage. The processing method of the cold-pressed fresh corn juice beverage provided by the scheme utilizes the processing equipment provided by the scheme to process and prepare the corn juice beverage without unfreezing the frozen fresh corn kernels, thereby shortening the processing steps, effectively preventing the pollution of microorganisms and ensuring the product quality; the corn juice is fine and uniform, fresh, sweet and fragrant, and has good taste.

Description

Processing equipment and preparation method of cold-pressed fresh corn juice beverage

Technical Field

The invention relates to the field of food processing, in particular to processing equipment and a preparation method of a cold-pressed fresh corn juice beverage.

Background

With the improvement of living standard and the enhancement of health consciousness of people, better taste bud experience and higher-order health requirements are pursued for the beverage. After consumers pay more attention to the health of the beverages, the beverages prepared by fresh squeezing, NFC, cold extraction and other processes are more and more favored by the consumers. The freshly squeezed full-nutrient corn juice is popular with consumers because of fresh and sweet taste, complete corn nutrient components, high dietary fiber content and the like. Because the production season of the corn is strong, and the fresh bracts of the corn still breathe vigorously after being picked, the preservation period is very short, in order to achieve the purposes of preservation, storage and transportation, convenient processing and the like, the fresh corn juice is generally prepared by freezing corn kernels at present, and the processing steps are as follows: thawing, single-stage or multi-stage pulping, filtering or not, enzymolysis or not, pasting, blending, homogenizing, filling and the like. Thermophilic bacillus is easily polluted by corn kernels in the unfreezing process, higher requirements are put forward for risk management and control in the production process, and the influence on the flavor of a corn juice product is also large. The full-nutrient corn juice is generally ground in multiple stages by adopting multiple grinding modes, and heat is easily generated in the grinding process, so that the microbial breeding environment is more easily created. The general solutions are: the production process is controlled by strengthening inspection, the pH value is adjusted by adding sodium bicarbonate, the sterilization temperature and time are increased, or the sterilization effect is achieved by adopting various sterilization modes. The methods improve the production management requirements, food additives such as sodium bicarbonate and the like are added contrary to the cleaning labels, the sterilization parameters are controlled carelessly, the browning and the taste change of the product are easily caused, the cost is increased, and the problems are urgently solved in the freshly squeezed corn juice.

Publication No. CN110973425A discloses a preparation method of a freshly squeezed corn juice beverage, which comprises the following steps: preparing raw materials: peeling corn bracts, cutting into sections, threshing, winnowing and rinsing, uniformly spreading corn grains, conveying the corn bracts into a steam room through a conveying belt, carrying out steam jet de-enzyming, carrying out shower rinsing with normal-temperature water after de-enzyming, cooling, conveying the corn bracts into quick-freezing equipment, bagging, and storing in a refrigeration house to finish raw material storage; unfreezing: unfreezing the corn kernels stored in the refrigeration house; grinding: putting the unfrozen corn seeds into purified water, and polishing to obtain sweet corn primary pulp; enzymolysis and emulsification: slowly heating the obtained corn primary pulp to 45-80 ℃, and adding 5-10U/g of corn alpha amylase and 2-20U/g of baking soda. The scheme adopts corn bracts to prepare corn juice, and has the problems that food additives such as sodium bicarbonate and the like are added and the cleaning label is contradictory.

Disclosure of Invention

In order to solve the technical problems, the invention provides processing equipment and a preparation method of a cold-pressed fresh corn juice beverage. In the scheme, the frozen fresh corn kernels do not need to be thawed, so that the processing steps are shortened, meanwhile, the pollution of microorganisms is effectively prevented, and the product quality is ensured; the corn juice is fine and uniform, fresh, sweet and fragrant, and has good taste.

The specific technical scheme of the invention is as follows: the utility model provides a processing equipment of cold press bright maize juice beverage, includes control system, including cold insulation breaker, cold insulation breaker connects cold insulation material and accepts the groove, and cold insulation material accepts the groove and passes through cold insulation screw elevator and connect one-level rubbing crusher, and one-level rubbing crusher connects gradually second grade rubbing crusher, jet mill device, gelatinization jar, blending jar, isotropic symmetry, sterilizing equipment and filling equipment through pipeline.

This scheme the processing equipment of fresh corn juice beverage of cold pressing mainly include control system, cold insulation breaker that freezes, cold insulation material receives the groove, cold insulation screw elevator, temperature control system, one-level rubbing crusher connects gradually second grade rubbing crusher, jet mill device, gelatinization jar, allotment jar, isotropic symmetry, sterilization machine, aseptic jar and filling equipment etc. constitution afterwards through pipeline. Quick-frozen corn grains are high in brittleness, a small amount of agglomerated corn is crushed in a heat preservation and freezing crushing device and enters a cold preservation material receiving tank, the corn grains in the cold preservation material receiving tank enter a grinding system through a cold preservation spiral elevator, spiral propelling discharging is carried out, and the spiral rotating speed can be controlled to control the feeding amount of grinding and the water adding amount of grinding, so that the concentration and the production amount of the corn pulp are controlled; the grain size of the frozen corn grains reaches 100-120 meshes through a primary crusher and a secondary crusher, and the temperature is controlled below 15 ℃. Because the frozen corn kernels are high in brittleness, fibers are easy to grind in a freeze-thaw state during crushing, and an ideal particle size can be achieved; the corn paste after the secondary crushing enters a jet mill, and the energy is gathered in a very small special flow channel space by the high-pressure jet mill, so that the special crushing, emulsification and homogenization under ultrahigh energy density are realized, and the excellent effect is achieved. The corn juice prepared after gelatinization has fine and rich taste and good stability.

Preferably, the lump crushing device comprises a feeding hole, a vibrating screen, a conveying belt, a crushing table and a crushing rod, wherein the vibrating screen is obliquely arranged below the feeding hole, the lower end of the vibrating screen is horizontal, the conveying belt is arranged at the lower end of the vibrating screen, the crushing table is arranged below the end point of the conveying belt in the moving direction, and the crushing rod is arranged on the crushing table; the inclination angle of the vibrating screen is 10-30 degrees, and the aperture of the vibrating screen is 1-4 cm; the crushing table is obliquely arranged below the conveying belt, the inclination angle is 15-45 degrees, the crushing rod is in vibration connection with the crushing table, and a horizontal central stirrer is arranged in the cold insulation material receiving tank; the control system is arranged in the cold insulation material receiving groove, and the temperatures of the cold insulation crushing device and the cold insulation material receiving groove are lower than 0 ℃.

The freezing-keeping crushing device comprises a feeding hole, a conveying belt, a vibrating screen, a crushing table and crushing rods, wherein quick-frozen corn kernels are poured into the feeding hole, a corn kernel dispersing part enters a cold-keeping material receiving groove through the vibrating screen, agglomerated corn kernels enter the conveying belt under the action of vibrating force and then are conveyed to the crushing table, and the agglomerated corn kernels enter the cold-keeping material receiving groove after being crushed and dispersed under the action of mechanical force of the crushing rods; the design of cold insulation material receiving groove cold insulation, horizontal central agitator stirring further guarantees the even dispersibility of kernel of corn, and horizontal agitator plays the effect of secondary crushing, and in order to improve the effect of stirring extruded process, helical blade can increase and decrease as required, also can choose for use comparatively sharp blade, and the rotational speed of spiral lifting mechanism mainly plays the effect of promoting the speed. The processing equipment for the cold-pressing full-nutrient fresh corn juice beverage has the advantages of high automation degree, sanitation, safety, full-nutrient utilization of corn kernels, no waste water and waste residues and the like, and the operating parameters, the temperature and the pH value are controlled by the control system on line.

The invention also discloses a method for preparing cold-pressed fresh corn juice beverage by using any processing equipment for cold-pressed fresh corn juice beverage, which comprises the following steps:

(a) cold pressing and coarse grinding: pouring the frozen corn kernels into a cold insulation crushing device, wherein the temperature in the cold insulation crushing device is lower than 0 ℃, feeding the crushed frozen corn kernels into a cold insulation material receiving tank, wherein the temperature in the cold insulation material receiving tank is lower than 0 ℃, conveying the frozen corn kernels into a primary crusher through a cold insulation screw elevator for coarse grinding, wherein the number of corn paste meshes after coarse grinding is 30-50 meshes, and the temperature is lower than 8 ℃, so as to obtain a coarse grinding material;

(b) fine grinding: inputting the coarsely ground material obtained in the step (a) into a secondary crusher for fine grinding, wherein the mesh number of the finely ground corn paste is 100-120 meshes, and the temperature is lower than 15 ℃ to obtain the finely ground material;

(c) a step of jet milling, which is to input the fine milled material obtained in the step (b) into a jet milling device, control the pressure to be 60-120Mpa, and control the corn paste mesh number to be 150-350 meshes to obtain slurry;

(d) pasting: feeding the slurry obtained in the step (c) into a pasting tank for boiling, keeping the temperature at 85-90 ℃ for 10-30 minutes to obtain paste;

(e) and (3) low-temperature blending: inputting the paste obtained in the step (d) into a blending tank for blending, wherein the temperature is 10-20 ℃, and the pH is 6.8-7.3, so as to obtain a blending material;

(f) homogenizing: homogenizing the blended material obtained in the step (e) in a homogenizer at a homogenizing pressure of 20-60MPa and a homogenizing temperature of 60-70 ℃ to obtain a homogenized material;

(g) and (3) sterilizing and packaging: sterilizing the homogeneous material obtained in the step (f) by a sterilizing machine UHT, and then feeding the homogeneous material into an aseptic tank, wherein the sterilization parameters are as follows: sterilizing at 130-. The product prepared by the scheme adopts UHT high-temperature instantaneous sterilization, so that the freshness of the product is kept to the maximum extent while the safety and the sanitation of the product are ensured.

Frozen corn kernels are taken out of a freezer and then poured into a cold insulation crushing device from a feeding hole at once, a corn kernel dispersing part enters a cold insulation material receiving tank through a vibrating screen, agglomerated corn kernels enter a conveying belt under the action of vibration force and then are conveyed to a crushing table, the agglomerated corn kernels enter the cold insulation material receiving tank after being crushed and dispersed under the action of mechanical force of a crushing rod, the cold insulation material receiving tank and the cold insulation crushing device are controlled by temperature to ensure that the frozen corn kernels cannot be dissolved, a horizontal central stirrer in the cold insulation material receiving tank is stirred to further ensure the uniform dispersion of the corn kernels, then the frozen corn kernels are conveyed into a primary crusher by a cold insulation screw elevator to be coarsely ground, the number of corn kernels after coarse grinding reaches 30-50 meshes, and meanwhile, the temperature is controlled below 8 ℃. When the corn is blended at low temperature, RO water is added according to the requirement to be blended to a corresponding concentration, the corn content is generally 20% -40%, white granulated sugar can be properly added to increase the sweet taste, erythritol, xylitol and other sugar substitutes can also be added, and the common addition amount is 1-5%; in the sterilization packaging process, the sterilized corn juice is cooled to 20-30 ℃ by adopting an aseptic cold filling technology, and is packaged by using a PET environment-friendly bottle, so that the obtained corn juice is fresh yellow in color, mellow and full-bodied in corn flavor and fragrant and sweet in taste, and the quality guarantee period can reach 9 months on the premise of not adding any stabilizer or preservative.

Preferably, in step (a), the temperature in the freezing and crushing device is lower than-8 ℃, and the temperature in the cold insulation material receiving tank is lower than-8 ℃; in the step (e), the corn content of the blending material is 20% -40%; and (g) filling the finished product of the cold-pressed fresh corn juice beverage into a PET environment-friendly bottle.

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

1. the cold-pressed fresh corn juice disclosed by the invention adopts a cold pressing process, the quick-frozen corn juice does not need to be unfrozen, the processing steps are shortened, meanwhile, the microbial pollution is effectively prevented, and the product quality is ensured;

2. the corn pulping equipment comprises cold-pressing coarse grinding (primary crushing), fine grinding (secondary crushing) and jet milling, corn juice after three times of pulping is grinded to be fine and smooth, the state is good under the condition of not adding any stabilizer, and the three times of pulping can also be subjected to parameter adjustment or permutation and combination to meet the requirements of different tastes;

3. the processing equipment for cold-pressing full-nutrient fresh corn juice beverage controls the operation parameters, temperature and pH value by the control system, and has the advantages of high automation degree, sanitation, safety, full-nutrient utilization of corn kernels, no waste water and waste residue and the like;

4. the technology of low-temperature blending, UHT instantaneous ultra-high temperature sterilization and aseptic cold filling is adopted, the freshness of the product is ensured, the prepared corn juice product has bright yellow color, pure and rich corn flavor and fragrant and sweet taste, and the shelf life can reach 9 months on the premise of not adding any stabilizer or preservative.

Drawings

FIG. 1 is a schematic view of a cold-pressed fresh corn juice beverage processing apparatus according to the present invention;

FIG. 2 is a schematic sectional view of a frozen material storage tank and a frozen crushing apparatus according to the present invention;

FIG. 3 is a schematic view showing the positional relationship of the vibrating screen, the crushing table and the crushing rod according to the present invention;

the reference signs are:

1. the device comprises a cold insulation crushing device, 11 parts of a feeding hole, 12 parts of a vibrating screen, 13 parts of a conveying belt, 14 parts of a crushing table, 15 parts of a crushing rod, 2 parts of a cold insulation spiral elevator, 3 parts of a primary crusher, 4 parts of a secondary crusher, 5 parts of a jet mill device, 6 parts of a pasting tank, 7 parts of a blending tank, 8 parts of a sterilizing device, 9 parts of a cold insulation material receiving tank, 91 parts of a horizontal central stirrer, 92 parts of a control system, 10 parts of a filling device and 16 parts of a homogenizer.

Detailed Description

The present invention will be further described with reference to the following examples. The devices, reagents and methods referred to in the present invention are those known in the art unless otherwise specified.

Example 1

Method for preparing cold-pressed fresh corn juice beverage by utilizing processing equipment of cold-pressed fresh corn juice beverage in scheme

(a) Cold pressing and coarse grinding: the frozen corn kernel freezing warehouse is taken out and poured into a cold insulation crushing device 1 from a feeding hole 11, the temperature in the cold insulation crushing device 1 is controlled to be-8 ℃ through a control system 92, a corn kernel dispersing part enters a cold insulation material receiving groove 9 through a vibrating screen 12, agglomerated corn kernels enter a conveying belt 13 under the action of vibration force and then are conveyed to a crushing table 14, the agglomerated corn kernels are crushed on the crushing table 14 by the mechanical force of a crushing rod 15 and then enter the cold insulation material receiving groove 9 after being subjected to vibration screening through the vibrating screen 12, the inclination angle of the vibrating screen is 20 degrees, and the aperture of the vibrating screen is 3 cm; the crushing table is obliquely arranged below the conveying belt, and the inclination angle is 30 degrees; stirring by a horizontal central stirrer 91 in a cold insulation material receiving tank 9 to further ensure the uniform dispersibility of the corn kernels, wherein the temperature of the cold insulation material receiving tank is-8 ℃, conveying the frozen corn kernels into a primary crusher 3 for coarse grinding by a cold insulation spiral elevator 2, and obtaining coarse ground corn paste with the grain number of 30 meshes and the temperature of 4 ℃ after coarse grinding; .

(b) Fine grinding: inputting the coarsely ground material obtained in the step (a) into a secondary grinder 4 for fine grinding, wherein the grain number of the finely ground corn paste is 100 meshes, and the temperature is 10 ℃, so as to obtain a finely ground material;

(c) jet mill, namely inputting the finely ground material obtained in the step (b) into a jet mill device 5, controlling the pressure at 100Mpa and the number of corn paste meshes at 150 meshes to obtain slurry;

(d) pasting: feeding the slurry obtained in the step (c) into a pasting tank 6 for boiling, keeping the temperature at 88 ℃ for 20 minutes to obtain a paste material;

(e) and (3) low-temperature blending: inputting the paste obtained in the step (d) into a blending tank 7 for blending, wherein the temperature is 15 ℃, and the pH value is 7.0 to obtain a blending material;

(f) homogenizing: homogenizing the blended material obtained in the step (e) at 50MPa and 60 ℃ to obtain a homogeneous material;

(g) and (3) sterilizing and packaging: and (f) feeding the homogenized material obtained in the step (f) into a sterilizing device 8, sterilizing for 10s at 130 ℃, then feeding into a filling device 10, and filling at 25 ℃ to obtain a finished product of the cold-pressed fresh corn juice beverage.

Comparative example 1

Comparative example 1 a fresh corn juice beverage was prepared using a conventional method. The difference from example 1 is that comparative example 1 first thawed the quick frozen corn kernels.

The product of example 1 of the invention was compared with the product of comparative example 1, and the sensory index of table 1, the physicochemical index of table 2 and the hygiene index of table 3 were obtained by testing, after 6 months of storage under the same storage conditions:

TABLE 1

TABLE 2

Item	Index (I)	Example 1 measurement of	Comparative example 1 measurement
				Total solids (g/100 g)	≥6.0	7.1	6.7

TABLE 3

Item	Index (I)	Example 1 measurement of	Comparative example 1 measurement
				Total number of colonies (CFU/ml)	n＝5,c＝2,m＝100,M＝1000	＜1,＜1,＜1,＜1,＜1	With bag expanding
Coliform group (CFU/ml)	N＝5,c＝2,m＝1,M＝10	＜1,＜1,＜1,＜1,＜1	With bag expanding

Unfreezing the quick-frozen corn kernels, grinding the quick-frozen corn kernels into slurry in a single stage or multiple stages, filtering or not filtering, carrying out enzymolysis or not, pasting, blending, homogenizing, filling and the like. The thawing generally carries out thawing or bubble thawing on the corn kernels stored in a refrigeration house, the thermophilic bacillus is easily polluted by the corn kernels in the thawing process, higher requirements are provided for risk management and control in the production process, and the influence on the flavor of a corn juice product is great;

traditional full-nutrient corn juice generally adopts multi-stage pulping in a plurality of pulping modes, heat is easily generated in the pulping process, the microbial breeding environment is easier to build, and the common solution is as follows: the production process is controlled by strengthening inspection, the pH value is adjusted by adding sodium bicarbonate, the sterilization temperature and time are increased, or the sterilization effect is achieved by adopting various sterilization modes. The methods improve the production management requirements, food additives such as sodium bicarbonate and the like are added contrary to the cleaning label, the sterilization parameters are controlled carelessly, the browning and the flavor change of the product are easily caused, and the cost is increased. The cold pressing and pulping mode can effectively prevent the propagation of microorganisms, pH value regulators such as sodium bicarbonate and the like can be not added by controlling the pulping temperature and the pH value of the corn paste, and meanwhile, sterilization parameters are more controllable, the energy is saved, the environment is protected, the product quality is stable, the color and luster are bright yellow, and the corn juice is fragrant, sweet and rich.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a processing equipment of cold press fresh corn juice beverage, includes control system (92), a serial communication port, including cold insulation breaker (1), cold insulation material receiving tank (9) is connected in cold insulation breaker (1), cold insulation material receiving tank (9) are through cold insulation screw elevator (2) connection one-level rubbing crusher (3), one-level rubbing crusher (3) connect gradually second grade rubbing crusher (4) through pipeline, jet mill device (5), gelatinization jar (6), blending jar (7), isotropic symmetry (16), sterilizing equipment (8) and filling equipment (10).

2. The processing equipment according to claim 1, characterized in that the lump crushing device (1) comprises a feeding hole (11), a vibrating screen (12), a conveying belt (13), a crushing table (14) and a crushing rod (15), wherein the vibrating screen (12) is obliquely arranged below the feeding hole (11), the lower end of the vibrating screen (12) is horizontal, the conveying belt (13) is arranged at the lower end of the vibrating screen (12), the crushing table (14) is arranged below the end point of the moving direction of the conveying belt (13), and the crushing rod (15) is arranged on the crushing table (14).

3. The processing plant according to claim 2, characterized in that the angle of inclination of the vibrating screen (12) is 10-30 °, the aperture of the vibrating screen being 1-4 cm.

4. The processing plant according to claim 2, characterized in that the crushing table (14) is arranged obliquely below the conveyor belt (13) at an angle of 15-45 °, the crushing bar (15) being in vibrating connection with the crushing table (14).

5. A processing plant according to claim 1, characterized in that the control system (92) is arranged in the cold insulation material receiving tank (9), and the temperature of the cold insulation crushing means (1) and the cold insulation material receiving tank (9) is below 0 ℃.

6. A processing plant according to claim 1, characterized in that a horizontal central stirrer (91) is arranged in said cold-insulated material receiving tank (9).

7. A method of preparing a cold-extracted fresh corn juice beverage using the apparatus for processing cold-extracted fresh corn juice beverage of any one of claims 1 to 6, comprising the steps of:

(a) cold pressing and coarse grinding: pouring frozen corn kernels into a cold insulation crushing device (1), wherein the temperature in the cold insulation crushing device (1) is lower than 0 ℃, feeding the crushed frozen corn kernels into a cold insulation material receiving tank (9), the temperature of the cold insulation material receiving tank (9) is lower than 0 ℃, conveying the frozen corn kernels into a primary crusher (3) through a cold insulation spiral elevator (2) for coarse grinding, and obtaining coarse grinding materials, wherein the number of corn paste meshes after coarse grinding is 30-50 meshes, and the temperature is lower than 8 ℃;

(b) fine grinding: inputting the coarsely ground material obtained in the step (a) into a secondary crusher (4) for fine grinding, wherein the mesh number of the finely ground corn paste is 100-120 meshes, and the temperature is lower than 15 ℃ to obtain a finely ground material;

(c) a step of jet milling, which is to input the fine milled material obtained in the step (b) into a jet milling device (5), control the pressure to be 60-120Mpa, and control the corn paste mesh number to be 150-350 meshes to obtain slurry;

(d) pasting: feeding the slurry obtained in the step (c) into a pasting tank (6) for boiling, keeping the temperature at 85-90 ℃ for 10-30 minutes to obtain a paste material;

(e) and (3) low-temperature blending: inputting the paste obtained in the step (d) into a blending tank (7) for blending, wherein the temperature is 10-20 ℃, and the pH value is 6.8-7.3, so as to obtain a blending material;

(f) homogenizing: homogenizing the blended material obtained in the step (e) in a homogenizer (16) at a homogenizing pressure of 20-60MPa and a homogenizing temperature of 60-70 ℃ to obtain a homogenized material;

(g) and (3) sterilizing and packaging: and (f) inputting the homogenized material obtained in the step (f) into a sterilizing device (8), then inputting the homogenized material into a filling device (10), and filling at 20-30 ℃ to obtain a finished product of the cold-pressed fresh corn juice beverage.

8. The process according to claim 7, wherein in step (a), the temperature in said cryo-disruption apparatus (1) is below-8 ℃ and the temperature in said cold-holding material receiving tank (9) is below-8 ℃.

9. The process of claim 7 wherein in step (e) the blend has a corn content of 20% to 40%.

10. The process of claim 7, wherein in step (g), the finished cold-pressed fresh corn juice beverage is filled into PET bottles.