CN112106870A - Freeze-dried coffee capable of being dissolved at low temperature and preparation process thereof - Google Patents
Freeze-dried coffee capable of being dissolved at low temperature and preparation process thereof Download PDFInfo
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- CN112106870A CN112106870A CN202010874720.6A CN202010874720A CN112106870A CN 112106870 A CN112106870 A CN 112106870A CN 202010874720 A CN202010874720 A CN 202010874720A CN 112106870 A CN112106870 A CN 112106870A
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- freeze
- temperature
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- coffee
- low temperature
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- 235000013353 coffee beverage Nutrition 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 238000001035 drying Methods 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 19
- 238000007710 freezing Methods 0.000 claims abstract description 13
- 230000008014 freezing Effects 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 238000012216 screening Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 235000020289 caffè mocha Nutrition 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 32
- 239000000843 powder Substances 0.000 claims description 6
- 239000011362 coarse particle Substances 0.000 claims description 5
- 238000000859 sublimation Methods 0.000 claims description 4
- 230000008022 sublimation Effects 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 238000004108 freeze drying Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 2
- 238000010981 drying operation Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims 1
- 125000003118 aryl group Chemical group 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 206010057040 Temperature intolerance Diseases 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000008543 heat sensitivity Effects 0.000 abstract description 2
- 230000000717 retained effect Effects 0.000 abstract description 2
- 241000334160 Isatis Species 0.000 abstract 1
- 235000021539 instant coffee Nutrition 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241001122767 Theaceae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 235000020965 cold beverage Nutrition 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 239000005457 ice water Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F5/00—Coffee; Coffee substitutes; Preparations thereof
- A23F5/24—Extraction of coffee; Coffee extracts; Making instant coffee
- A23F5/26—Extraction of water-soluble constituents
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F5/00—Coffee; Coffee substitutes; Preparations thereof
- A23F5/24—Extraction of coffee; Coffee extracts; Making instant coffee
- A23F5/28—Drying or concentrating coffee extract
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F5/00—Coffee; Coffee substitutes; Preparations thereof
- A23F5/24—Extraction of coffee; Coffee extracts; Making instant coffee
- A23F5/28—Drying or concentrating coffee extract
- A23F5/30—Drying or concentrating coffee extract by freezing out the water
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Tea And Coffee (AREA)
Abstract
The invention relates to freeze-dried coffee capable of being dissolved at low temperature and a preparation process thereof, wherein the freeze-dried coffee comprises the following raw materials in parts by weight: 43-47% of Columbia coffee, 8% of Cartique, 17% of Lanshan, 13-18% of mocha, 8.5-10.5% of Java and 8% of Isatis, and the preparation method comprises the following operation steps of concentration, cooling, freezing, cooling, crushing, screening and drying, so that the drying efficiency is improved, the equipment investment and energy consumption are reduced, the volatilization of aromatic substances is reduced, meanwhile, in order to reduce the load of an ice flake maker, micropores left when water vapor escapes are fully distributed in freeze-dried coffee particles, the particles are similar to sponge, the particles are good in instant solubility and can be dissolved and used in low-temperature liquid, the drying process is carried out at low temperature and high vacuum degree, the aromatic substances with strong heat sensitivity are retained, the aroma is strong, the mouthfeel is pure, and the particle shape is not changed in the drying process.
Description
Technical Field
The invention relates to freeze-dried coffee capable of being dissolved at low temperature and a preparation process thereof, and belongs to the technical field of food processing.
Background
With the change of consumption habits of people, people like ice cold drink coffee in summer, so the demand of cold-soluble instant freeze-dried coffee is urgent, at present, most of instant coffee on the market is dissolved by hot water, after the instant coffee is filled into a beverage, a layer of fine insoluble substances are arranged at the bottom of a bottle, and the instant coffee powder sold on the market is difficult to be fully dissolved under the condition of ice water, so that the freeze-dried coffee capable of being dissolved at low temperature and the preparation process thereof are provided.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the existing defects, provide the freeze-dried coffee capable of being dissolved at low temperature and the preparation process thereof, and effectively solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme:
a freeze-dried coffee capable of being dissolved at low temperature and a preparation process thereof comprise the following raw materials in parts by weight: 43 to 47 percent of Columbia coffee, 8 percent of Cartique, 17 percent of Lanshan, 13 to 18 percent of Mocha, 8.5 to 10.5 percent of Java and 8 percent of Esomeria.
A freeze-dried coffee soluble at low temperature and its preparing process includes such steps as concentrating, cooling, freezing, cooling, breaking, sieving and drying.
The concentration operation steps are as follows: mixing the ground coffee powder with water in a weight ratio of 1: 15-25, and concentrating in steam to obtain a coffee concentrated solution with a concentration of 45%;
the cooling operation steps are as follows: the original temperature of the concentrated solution is 50 ℃, and the materials are cooled to 0-2 ℃ by adopting a plate type heat exchanger;
the freezing operation steps are as follows: conveying the material into a flake ice maker through a pipeline, wherein the evaporation temperature of a refrigerant for converting the material from a liquid state into a solid state flake ice maker is-30 ℃, and the prepared frozen material particles are 5-10mm in size and have the temperature of about-10 ℃;
the operation steps of cooling, crushing and screening are as follows: crushing the frozen material particles obtained in the freezing operation step, reducing the temperature of the material to-43 ℃ through a freezing tunnel before crushing, then sending the material into a double-roller crusher for crushing, completing crushing at a ratio of 5:1 or less at one time, directly falling into a two-stage vibrating screen for screening,
the drying operation steps are as follows: the freeze drying is carried out in batches, the materials stored in the storage chamber at the temperature of-40 ℃ are coiled, loaded and loaded on a small crane, the small crane sends the materials into a drying chamber through a head rail, the chamber door is closed immediately after the materials are loaded, the vacuum pumping is started until the pressure is 0.4mbar, and the coffee particles are dehydrated and dried at the temperature of-28 ℃ under the vacuum pressure.
As a further description of the above scheme, the operation steps of the sieving are as follows: a, conveying the coarse particles on the uppermost layer by a lifting machine, returning the coarse particles to the crusher, and crushing the coarse particles again; b) the middle layer is qualified and uniform-thickness particles, and is conveyed to a storage bin for storage, loaded by a plate which is pre-cooled to a proper temperature, hung on a crane and stored in the storage bin for preparation, and conveyed to a freeze dryer for drying in batches; the lowest layer is too fine particles and powder, falls into a concentrated solution storage tank, is mixed and melted, and is also used as a part of cold source to carry out primary cooling on the concentrated solution so as to fully utilize energy.
As further description of the scheme, heat required by sublimation of the ice crystals is provided by a heating plate arranged in the drying bin in a radiation mode so as to ensure that the materials are heated as uniformly as possible, and water vapor generated by sublimation is pumped into a condenser by a vacuum pump to be collected so as to maintain the vacuum degree in the drying bin.
As further described in the scheme, after the drying is finished, the finished product is put into a film bag as soon as possible for sealing and preservation, and the relative temperature of a subpackaging workshop is kept at 25-35% and below 20 ℃.
As further description of the above scheme, the concentration time is 5min-10min, and the temperature of the water vapor is 120-130 ℃.
The invention has the beneficial effects that:
1. the drying efficiency is improved, the equipment investment and the energy consumption are reduced, the volatilization of aromatic substances is reduced, and meanwhile, in order to reduce the load of the flake ice maker, micropores left when water vapor escapes are fully distributed in freeze-dried coffee particles, the freeze-dried coffee particles are similar to sponges, have good instant solubility, and can be dissolved and used in low-temperature liquid;
2. the drying process is carried out at low temperature and high vacuum degree, and aromatic substances with strong heat sensitivity are retained, so that the aromatic tea has strong fragrance and pure taste;
3. the drying process does not change the shape of the particles, so that the coffee particles produced retain the shape of small sand with sharp corners, no cracking, no shrinkage and no surface hardening after freezing and crushing.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a flow chart of a freeze-dried coffee that can be dissolved at a low temperature and a preparation process thereof according to the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Referring to fig. 1, the present invention provides a technical solution: a freeze-dried coffee capable of being dissolved at low temperature and a preparation process thereof comprise the following raw materials in parts by weight: 43 to 47 percent of Columbia coffee, 8 percent of Cartique, 17 percent of Lanshan, 13 to 18 percent of Mocha, 8.5 to 10.5 percent of Java and 8 percent of Esomeria.
The preparation method of the cold-soluble freeze-dried coffee comprises the following steps:
concentration: mixing the ground coffee powder with water in a weight ratio of 1: 15-25, and concentrating in steam to obtain a coffee concentrated solution with a concentration of 45%;
and (3) cooling: the original temperature of the concentrated solution is 50 ℃, and the materials are cooled to 0-2 ℃ by adopting a plate type heat exchanger;
freezing: conveying the material into a flake ice maker through a pipeline, wherein the evaporation temperature of a refrigerant for converting the material from a liquid state into a solid state flake ice maker is-30 ℃, and the prepared frozen material particles are 5-10mm in size and have the temperature of about-10 ℃;
cooling, crushing and screening: crushing the frozen material particles obtained in the freezing operation step, reducing the temperature of the material to-43 ℃ through a freezing tunnel before crushing, then sending the material into a double-roller crusher for crushing, completing crushing at a ratio of 5:1 or less at one time, directly falling into a two-stage vibrating screen for screening,
and (3) drying: freeze drying is carried out according to batches, materials stored in a storage chamber at the temperature of-40 ℃ are coiled, loaded and installed on a small crane, the small crane sends the materials into a drying chamber through a head rail, a chamber door is closed immediately after the materials are loaded, vacuumizing is started to 0.4mbar, and coffee particles are dehydrated and dried at the temperature of-28 ℃ under vacuum pressure, so that the cold-soluble freeze-dried coffee is obtained.
The above embodiments are preferred embodiments of the present invention, and those skilled in the art can make variations and modifications to the above embodiments, therefore, the present invention is not limited to the above embodiments, and any obvious improvements, substitutions or modifications made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (6)
1. A freeze-dried coffee capable of being dissolved at low temperature and a preparation process thereof comprise the following raw materials in parts by weight: 43 to 47 percent of Columbia coffee, 8 percent of Cartique, 17 percent of Lanshan, 13 to 18 percent of Mocha, 8.5 to 10.5 percent of Java and 8 percent of Esomeria.
2. The freeze-dried coffee capable of being dissolved at low temperature and the preparation process thereof according to claim 1, wherein the preparation method comprises the following operation steps of concentration, cooling, freezing, temperature reduction, crushing and screening, and drying;
the concentration operation steps are as follows: mixing the ground coffee powder with water in a weight ratio of 1: 15-25, and concentrating in steam to obtain a coffee concentrated solution with a concentration of 45%;
the cooling operation steps are as follows: the original temperature of the concentrated solution is 50 ℃, and the materials are cooled to 0-2 ℃ by adopting a plate type heat exchanger;
the freezing operation steps are as follows: conveying the material into a flake ice maker through a pipeline, wherein the evaporation temperature of a refrigerant for converting the material from a liquid state into a solid state flake ice maker is-30 ℃, and the prepared frozen material particles are 5-10mm in size and have the temperature of about-10 ℃;
the operation steps of cooling, crushing and screening are as follows: crushing the frozen material particles obtained in the freezing operation step, reducing the temperature of the material to-43 ℃ through a freezing tunnel before crushing, then sending the material into a double-roller crusher for crushing, completing crushing at a ratio of 5:1 or less at one time, directly falling into a two-stage vibrating screen for screening,
the drying operation steps are as follows: the freeze drying is carried out in batches, the materials stored in the storage chamber at the temperature of-40 ℃ are coiled, loaded and loaded on a small crane, the small crane sends the materials into a drying chamber through a head rail, the chamber door is closed immediately after the materials are loaded, the vacuum pumping is started until the pressure is 0.4mbar, and the coffee particles are dehydrated and dried at the temperature of-28 ℃ under the vacuum pressure.
3. The freeze-dried coffee capable of being dissolved at low temperature and the preparation process thereof according to claim 2, wherein the sieving comprises the following steps: (a) the topmost layer is coarse particles, and the coarse particles are conveyed by a lifting machine and returned to the crusher for crushing again; (b) the middle layer is qualified and uniform-thickness particles, and is conveyed to a storage bin for storage, loaded by a plate which is pre-cooled to a proper temperature, hung on a crane and stored in the storage bin for preparation, and conveyed to a freeze dryer for drying in batches; (c) the lowest layer is too fine granules and powder, falls into a concentrated solution storage tank, is mixed and melted, and is also used as a part of cold source to primarily cool the concentrated solution so as to fully utilize energy.
4. The freeze-dried coffee soluble at a low temperature and the preparation process thereof according to claim 2, wherein: the heat required by ice crystal sublimation is provided by a heating plate arranged in the drying bin in a radiation mode to ensure that the material is heated as uniformly as possible, and the water vapor generated by sublimation is pumped to a condenser by a vacuum pump to be collected so as to maintain the vacuum degree in the drying bin.
5. The freeze-dried coffee soluble at a low temperature and the preparation process thereof according to claim 2, wherein: after drying, the finished product is put into a film bag as soon as possible for sealing and storage, and the relative temperature of the film bag is kept between 25 and 35 percent in a subpackaging workshop and is kept below 20 ℃.
6. The freeze-dried coffee soluble at a low temperature and the preparation process thereof according to claim 2, wherein: the concentration time is 5min-10min, and the temperature of the water vapor is 120 ℃ to 130 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010874720.6A CN112106870A (en) | 2020-08-27 | 2020-08-27 | Freeze-dried coffee capable of being dissolved at low temperature and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010874720.6A CN112106870A (en) | 2020-08-27 | 2020-08-27 | Freeze-dried coffee capable of being dissolved at low temperature and preparation process thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112106870A true CN112106870A (en) | 2020-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010874720.6A Pending CN112106870A (en) | 2020-08-27 | 2020-08-27 | Freeze-dried coffee capable of being dissolved at low temperature and preparation process thereof |
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| CN (1) | CN112106870A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112619841A (en) * | 2020-12-24 | 2021-04-09 | 云南大学 | Freeze-drying ice particle processing device and preparation process |
| CN115444058A (en) * | 2022-10-14 | 2022-12-09 | 广东顺大食品调料有限公司 | Production process of freeze-dried coffee powder |
-
2020
- 2020-08-27 CN CN202010874720.6A patent/CN112106870A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112619841A (en) * | 2020-12-24 | 2021-04-09 | 云南大学 | Freeze-drying ice particle processing device and preparation process |
| CN115444058A (en) * | 2022-10-14 | 2022-12-09 | 广东顺大食品调料有限公司 | Production process of freeze-dried coffee powder |
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Application publication date: 20201222 |
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