Coffee extraction system

Abstract

The coffee extraction system comprises a grinding extraction unit, a homogenizing unit, a high-pressure microjet extraction unit and a centrifugal extraction unit which are sequentially connected in series, and the grinding extraction unit comprises a wet grinding device, a first extraction tank and a first heat exchanger which are sequentially connected in series; the high-pressure micro-jet unit comprises high-pressure micro-jet equipment, a second heat exchanger and a second extraction tank which are sequentially connected in series; the centrifugal unit comprises a butterfly centrifuge, a third extraction tank, a tubular centrifuge and a fourth extraction tank which are sequentially connected in series. The coffee bean cold extraction device can directly feed roasted coffee beans, the process of grinding the roasted coffee beans into powder is omitted, the process time is shortened, meanwhile, the original flavor of coffee is better reserved, the extraction rate of cold extraction can be improved, meanwhile, the extraction temperature is controlled in the whole process, and the flavor of the coffee is further guaranteed. In addition, on-line automatic control can be achieved, production efficiency is further improved, labor cost is reduced, and production cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of food processing, and in particular relates to a coffee extraction system. Background Art

[0002] Coffee is loved by consumers for its unique aroma and refreshing effects. With the improvement of living standards, people have higher and higher requirements for the quality of coffee. Coffee extract is a concentrated liquid extracted from coffee beans through an extraction process. Compared with traditional coffee powder and instant coffee, coffee extract has higher quality and richer taste. The original flavor and nutrients in the coffee beans are retained during its production process, so the taste of coffee extract is richer and more mellow. Compared with traditional ground coffee and instant coffee, the brewing process of coffee extract is simpler and faster. Just add an appropriate amount of water to the coffee extract to quickly get a cup of rich and delicious coffee. Compared with traditional coffee powder, coffee extract reduces the generation of packaging waste and is more environmentally friendly. Based on the above advantages, coffee extract, as a high-quality coffee option, has become the first choice of many consumers.

[0003] According to the different extraction temperatures, the coffee extract preparation process is divided into hot extraction process and cold extraction process. Compared with the hot extraction process, the retention effect of coffee aroma and active ingredients is significantly better, and the flavor and taste of the obtained coffee extract are significantly better. However, the cold extraction process has a long extraction cycle, low extraction rate, and high production cost, which is not conducive to industrial production, resulting in a relatively high market price for high-quality coffee extract. Summary of the invention

[0004] The utility model aims to provide a coffee extraction system which can improve coffee extraction efficiency, reduce production costs, and well preserve the original flavor of coffee for industrial production of coffee extract.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A coffee extraction system comprises a grinding extraction unit, a homogenizing unit, a high-pressure micro-jet extraction unit and a centrifugal extraction unit which are sequentially arranged in series, wherein the grinding extraction unit comprises a wet grinding device, a first extraction tank and a first heat exchanger which are sequentially arranged in series; the homogenizing unit comprises a homogenizer; the high-pressure micro-jet extraction unit comprises a high-pressure micro-jet device, a second heat exchanger and a second extraction tank which are sequentially arranged in series; the centrifugal extraction unit comprises a butterfly centrifuge, a third extraction tank, a tubular centrifuge and a fourth extraction tank which are sequentially arranged in series.

[0007] The utility model realizes a multi-stage cold extraction process of grinding extraction-homogenization-high-pressure micro-jet extraction-centrifugal extraction by organically combining a wet grinding device, a homogenizer, a high-pressure micro-jet device, a butterfly centrifuge, a tubular centrifuge and a plurality of extraction tanks. Through the multi-stage cold extraction process, the extraction rate of cold extraction is effectively improved, the flavor is better preserved, and continuous and industrialized production is realized without grinding or powdering roasted coffee beans.

[0008] Preferably, the first extraction tank, the second extraction tank, the third extraction tank and the fourth extraction tank are all provided with cooling water jackets on the outside and stirring devices on the inside.

[0009] Further preferably, the stirring device is a vertical stirrer, which has a good stirring effect.

[0010] Further preferably, the first extraction tank, the second extraction tank, the third extraction tank and the fourth extraction tank are also provided with a temperature meter (or temperature sensor), a liquid level sensor (or weighing sensor), an observation window, etc. The material temperature is controlled to be ≤10°C by the cooling water jacket and the temperature meter (or temperature sensor); the amount of material in the tank is controlled by the liquid level sensor (or weighing sensor), and the stirring extraction time of the material in the tank is controlled in combination with the material inlet and outlet flow rate.

[0011] Preferably, the first extraction tank, the second extraction tank, the third extraction tank and the fourth extraction tank are all connected to a CIP automatic cleaning system and a hot water pipeline for conveying hot water. The CIP automatic cleaning system is used to regularly clean each extraction tank, and the hot water pipeline is used to convey hot water into each extraction tank to disinfect each extraction tank.

[0012] Preferably, the first heat exchanger and the second heat exchanger are both plate heat exchangers. The plate heat exchanger is used to reduce the material temperature to below 15°C.

[0013] In the present invention, the median particle size of the material after the pulping and extraction unit is preferably 300-600 μm.

[0014] In the utility model, the homogenizer further breaks and mixes the materials, the homogenization pressure is preferably 350-450 bar, and the median particle size after homogenization is preferably 50-75 μm.

[0015] In the utility model, the high-pressure micro jet device further cavitates, collides and shears the material in the high-pressure jet cavity. The high-pressure micro jet pressure is preferably 650-750 bar, and the median particle size after the high-pressure micro jet is preferably 25-50 μm.

[0016] In the present invention, further purification is performed by butterfly centrifugation, the centrifugal speed is preferably 5500-7500 rpm, the particle size of the material after centrifugation is preferably 3-10 μm, and the slag content is preferably ≤1.2%.

[0017] In the utility model, further purification is performed by tubular centrifugation, the centrifugal speed is preferably 10000-15000rpm, the particle size of the material after centrifugation is preferably 0.5-1μm, and the slag content is preferably ≤0.8%. During the centrifugation of the butterfly centrifuge, the exhaust control valve is properly opened to exhaust the butterfly centrifuge.

[0018] According to a specific embodiment, the pulping extraction unit includes a wet grinding device, a first extraction tank, a first heat exchanger, a first pipe for conveying water connected to the wet grinding device, a second pipe for conveying coffee beans connected to the wet grinding device, a third pipe for connecting the wet grinding device and the first extraction tank, and a fourth pipe for connecting the first extraction tank and the first heat exchanger; the homogenization unit includes a homogenizer and a fifth pipe for connecting the first heat exchanger and the homogenizer; the high-pressure micro-jet extraction unit includes a high-pressure micro-jet device, a second heat exchanger, a second extraction tank, a a sixth pipeline connecting the homogenizer and the high-pressure microfluidic device, a seventh pipeline connecting the high-pressure microfluidic device and the second heat exchanger, and an eighth pipeline connecting the second heat exchanger and the second extraction tank; the centrifugal extraction unit includes a butterfly centrifuge, a third extraction tank, a tubular centrifuge, a fourth extraction tank, a ninth pipeline connecting the butterfly centrifuge and the second extraction tank, a tenth pipeline connecting the butterfly centrifuge and the third extraction tank, an eleventh pipeline connecting the third extraction tank and the tubular centrifuge, and a twelfth pipeline connecting the tubular centrifuge and the fourth extraction tank.

[0019] Further preferably, the fourth pipeline, the eighth pipeline, the tenth pipeline, the eleventh pipeline and the twelfth pipeline are all provided with a delivery pump.

[0020] Further preferably, the second pipeline, the third pipeline, the fourth pipeline, the ninth pipeline, the tenth pipeline, and the eleventh pipeline are all provided with pneumatic control valves.

[0021] Further preferably, the ninth pipeline is also connected to an exhaust pipe, and the exhaust pipe is provided with an exhaust control valve.

[0022] Preferably, the coffee extraction system also includes a concentration unit, which includes a concentration device, a third heat exchanger and a storage tank arranged in series in sequence. A cooling water jacket may be selectively provided on the outside of the storage tank, and a stirring device may be selectively provided on the inside. The storage tank may be selectively connected to a CIP automatic cleaning system and a hot water pipe for conveying hot water.

[0023] The material can be concentrated to a desired concentration by a concentration device, for example, a concentration of 65° BRIX.

[0024] According to a specific embodiment, the concentration unit includes a concentration device, a third heat exchanger, a storage tank, a thirteenth pipeline for connecting the fourth extraction tank and the concentration device, a fourteenth pipeline for connecting the concentration device and the third heat exchanger, and a fifteenth pipeline for connecting the third heat exchanger and the storage tank, the thirteenth pipeline and the fourteenth pipeline are respectively provided with a delivery pump, and the thirteenth pipeline and the fifteenth pipeline are respectively provided with a pneumatic control valve.

[0025] The coffee extraction system of the utility model also includes a control system capable of controlling the operation of each instrument in the coffee extraction system. The control system controls the start and shut down of each device (including a delivery pump and a pneumatic control valve) to achieve automated and continuous production, reduce labor costs, and reduce production costs.

[0026] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0027] The utility model realizes online coffee extraction by organically combining a wet grinding device, a homogenizer, a high-pressure microfluidizer, a butterfly centrifuge, a tubular centrifuge and multiple extraction tanks, which can not only directly feed roasted coffee beans, eliminating the process of grinding roasted coffee beans into powder, and better retain the original flavor of coffee while shortening the process time, but also can improve the extraction rate of cold extraction while controlling the extraction temperature throughout the process, further ensuring the coffee flavor. The coffee extraction system of the utility model can also realize online automatic control, further improve production efficiency, reduce labor costs, and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A schematic diagram of the process of a coffee extraction system according to an embodiment;

[0030] Figure 2 is a schematic structural diagram of a coffee extraction system in an embodiment,

[0031] In the above drawings: 11, wet grinding device; 12, first extraction tank; 13, first heat exchanger; 2, homogenizer; 31, high-pressure microfluidic device; 32, second heat exchanger; 33, second extraction tank; 41, butterfly centrifuge; 42, third extraction tank; 43, tubular centrifuge; 44, fourth extraction tank; 51, concentration device; 52, third heat exchanger; 53, storage tank; 61, first pipeline; 62, second pipeline; 63, third pipeline; 64, fourth pipeline; 65, fifth pipeline; 66, sixth pipeline; 67, seventh pipeline; 68, eighth pipeline; 69, ninth pipeline; 610, tenth pipeline; 611, eleventh pipeline; 612, twelfth pipeline; 613, thirteenth pipeline; 614, fourteenth pipeline; 615, fifteenth pipeline, 7, delivery pump; 8, pneumatic control valve; 9, exhaust control valve. DETAILED DESCRIPTION

[0032] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0033] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0034] Example

[0035] like Figure 1 As shown, this embodiment provides a coffee extraction system, which includes a pulping extraction unit, a homogenizing unit, a high-pressure micro-jet extraction unit, a centrifugal extraction unit, a concentration unit and a control system which are sequentially arranged in series.

[0036] like Figure 2As shown, the pulping extraction unit includes a wet grinding device 11, a first extraction tank 12, a first heat exchanger 13, a first pipe 61 for conveying water connected to the wet grinding device 11, a second pipe 62 for conveying coffee beans connected to the wet grinding device 11, a third pipe 63 for connecting the wet grinding device 11 and the first extraction tank 12, and a fourth pipe 64 for connecting the first extraction tank 12 and the first heat exchanger 13. The homogenization unit includes a homogenizer 2 and a fifth pipe 65 for connecting the first heat exchanger 13 and the homogenizer 2. The high-pressure micro-jet extraction unit includes a high-pressure micro-jet device 31, a second heat exchanger 32, a second extraction tank 33, a sixth pipe 66 for connecting the homogenizer 2 and the high-pressure micro-jet device 31, a seventh pipe 67 for connecting the high-pressure micro-jet device 31 and the second heat exchanger 32, and an eighth pipe 68 for connecting the second heat exchanger 32 and the second extraction tank 33. The centrifugal extraction unit includes a butterfly centrifuge 41, a third extraction tank 42, a tubular centrifuge 43, a fourth extraction tank 44, a ninth pipeline 69 for connecting the butterfly centrifuge 41 and the second extraction tank 33, a tenth pipeline 610 for connecting the butterfly centrifuge 41 and the third extraction tank 42, an eleventh pipeline 611 for connecting the third extraction tank 42 and the tubular centrifuge 43, and a twelfth pipeline 612 for connecting the tubular centrifuge 43 and the fourth extraction tank 44. The concentration unit includes a concentration device 51, a third heat exchanger 52, a storage tank 53, a thirteenth pipeline 613 for connecting the fourth extraction tank 44 and the concentration device 51, a fourteenth pipeline 614 for connecting the concentration device 51 and the third heat exchanger 52, and a fifteenth pipeline 615 for connecting the third heat exchanger 52 and the storage tank 53, which are sequentially arranged in series.

[0037] In this embodiment, the first extraction tank 12, the second extraction tank 33, the third extraction tank 42, the fourth extraction tank 44 and the storage tank 53 are all provided with cooling water jackets on the outside and vertical stirrers on the inside. The first extraction tank 12, the second extraction tank 33, the third extraction tank 42, the fourth extraction tank 44 and the storage tank 53 are also respectively provided with temperature sensors, liquid level sensors and observation windows. The first extraction tank 12, the second extraction tank 33, the third extraction tank 42, the fourth extraction tank 44 and the storage tank 53 are also respectively connected with a CIP automatic cleaning system for regularly cleaning each extraction tank and a hot water pipeline for conveying hot water into each extraction tank to disinfect each extraction tank.

[0038] In this embodiment, the fourth pipeline 64, the eighth pipeline 68, the tenth pipeline 610, the eleventh pipeline 611 and the twelfth pipeline 612 are all provided with a delivery pump 7. The second pipeline 62, the third pipeline 63, the fourth pipeline 64, the ninth pipeline 69, the tenth pipeline 610 and the eleventh pipeline 611 are all provided with a pneumatic control valve 8. The ninth pipeline 69 is also connected to an exhaust pipe, and an exhaust control valve 9 is provided on the exhaust pipe.

[0039] In this embodiment, the first heat exchanger 13 and the second heat exchanger 32 are both plate heat exchangers. The equipment used in this embodiment can be obtained from the market and can be selected according to the required parameters, which will not be described in detail here.

[0040] In this embodiment, the control system can control the operation of each instrument in the coffee system ( Figure 2 The control system controls the start and shut down of each device (including the delivery pump 7 and the pneumatic control valve 8) to achieve automated and continuous production, reduce labor costs, and reduce production costs.

[0041] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A coffee extraction system, characterized in that: It includes a pulping extraction unit, a homogenization unit, a high-pressure microfluidic extraction unit, and a centrifugal extraction unit which are sequentially arranged in series. The pulping and extraction unit comprises a wet grinding device (11), a first extraction tank (12) and a first heat exchanger (13) which are sequentially arranged in series; The homogenizing unit comprises a homogenizer (2); The high-pressure microfluidic extraction unit comprises a high-pressure microfluidic device (31), a second heat exchanger (32) and a second extraction tank (33) which are sequentially arranged in series; The centrifugal extraction unit comprises a butterfly centrifuge (41), a third extraction tank (42), a tubular centrifuge (43) and a fourth extraction tank (44) which are sequentially arranged in series.

2. The coffee extraction system according to claim 1, characterized in that: The first extraction tank (12), the second extraction tank (33), the third extraction tank (42) and the fourth extraction tank (44) are all provided with cooling water jackets on the outside and stirring devices on the inside.

3. The coffee extraction system according to claim 2, characterized in that: The first extraction tank (12), the second extraction tank (33), the third extraction tank (42) and the fourth extraction tank (44) are all connected to a CIP automatic cleaning system and a hot water pipeline for conveying hot water.

4. The coffee extraction system according to claim 1, characterized in that: The first heat exchanger (13) and the second heat exchanger (32) are both plate heat exchangers.

5. The coffee extraction system according to claim 1, characterized in that: The grinding and extraction unit comprises a wet grinding device (11), a first extraction tank (12), a first heat exchanger (13), a first pipe (61) connected to the wet grinding device (11) for conveying water, a second pipe (62) connected to the wet grinding device (11) for conveying coffee beans, a third pipe (63) for connecting the wet grinding device (11) and the first extraction tank (12), and a fourth pipe (64) for connecting the first extraction tank (12) and the first heat exchanger (13); The homogenizing unit comprises a homogenizer (2) and a fifth pipeline (65) for connecting the first heat exchanger (13) and the homogenizer (2); The high-pressure microfluidic extraction unit comprises a high-pressure microfluidic device (31), a second heat exchanger (32), a second extraction tank (33), a sixth pipeline (66) for connecting the homogenizer (2) and the high-pressure microfluidic device (31), a seventh pipeline (67) for connecting the high-pressure microfluidic device (31) and the second heat exchanger (32), and an eighth pipeline (68) for connecting the second heat exchanger (32) and the second extraction tank (33); The centrifugal extraction unit comprises a butterfly centrifuge (41), a third extraction tank (42), a tubular centrifuge (43), a fourth extraction tank (44), a ninth pipeline (69) for connecting the butterfly centrifuge (41) and the second extraction tank (33), a tenth pipeline (610) for connecting the butterfly centrifuge (41) and the third extraction tank (42), an eleventh pipeline (611) for connecting the third extraction tank (42) and the tubular centrifuge (43), and a twelfth pipeline (612) for connecting the tubular centrifuge (43) and the fourth extraction tank (44).

6. The coffee extraction system according to claim 5, characterized in that: The fourth pipeline (64), the eighth pipeline (68), the tenth pipeline (610), the eleventh pipeline (611) and the twelfth pipeline (612) are all provided with a delivery pump (7).

7. The coffee extraction system according to claim 5, characterized in that: The second pipeline (62), the third pipeline (63), the fourth pipeline (64), the ninth pipeline (69), the tenth pipeline (610), and the eleventh pipeline (611) are all provided with pneumatic control valves (8).

8. The coffee extraction system according to claim 5, characterized in that: The ninth pipeline (69) is also connected to an exhaust pipe, and an exhaust control valve (9) is provided on the exhaust pipe.

9. The coffee extraction system according to any one of claims 1 to 8, characterized in that: The coffee extraction system also includes a concentration unit, which includes a concentration device, a third heat exchanger (52) and a storage tank (53) arranged in series in sequence. A cooling water jacket can be selectively provided on the outside of the storage tank (53), and a stirring device can be selectively provided on the inside. The storage tank (53) can be selectively connected to a CIP automatic cleaning system and a hot water pipeline for conveying hot water.

10. The coffee extraction system according to claim 9, characterized in that: The concentrating unit comprises a concentrating device (51), a third heat exchanger (52), a storage tank (53), a thirteenth pipeline (613) for connecting the fourth extraction tank (44) and the concentrating device (51), a fourteenth pipeline (614) for connecting the concentrating device (51) and the third heat exchanger (52), and a fifteenth pipeline (615) for connecting the third heat exchanger (52) and the storage tank (53), the thirteenth pipeline (613) and the fourteenth pipeline (614) are respectively provided with a delivery pump (7), and the thirteenth pipeline (613) and the fifteenth pipeline (615) are respectively provided with a pneumatic control valve (8).

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