CN111759175A - High-concentration coffee extracting solution extraction system and extraction method - Google Patents
High-concentration coffee extracting solution extraction system and extraction method Download PDFInfo
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- CN111759175A CN111759175A CN202010642116.0A CN202010642116A CN111759175A CN 111759175 A CN111759175 A CN 111759175A CN 202010642116 A CN202010642116 A CN 202010642116A CN 111759175 A CN111759175 A CN 111759175A
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J31/00—Apparatus for making beverages
- A47J31/40—Beverage-making apparatus with dispensing means for adding a measured quantity of ingredients, e.g. coffee, water, sugar, cocoa, milk, tea
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J31/00—Apparatus for making beverages
- A47J31/06—Filters or strainers for coffee or tea makers ; Holders therefor
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J31/00—Apparatus for making beverages
- A47J31/44—Parts or details or accessories of beverage-making apparatus
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Abstract
The invention discloses a high-concentration coffee extract extraction system and an extraction method, the high-concentration coffee extract process flow comprises the steps of preparing materials, low-temperature extraction, low-temperature cooling, filtration, centrifugation and sterilization, in the low-temperature extraction, the flow velocity of water flow is controlled by a homogenizer, 2-4MPa pressure is applied, pure water can enter from the lower side of an extraction tank at uniform speed after passing through the homogenizer to reversely and fully extract essence components in coffee powder from bottom to top, an extraction tank group is a continuous extraction tank, namely, the pure water entering into a No. 1 extraction tank extracts the coffee powder in the tank from bottom to top to obtain a primary filtered extract, the primary filtered extract is then introduced into a No. 2 extraction tank from bottom to top to extract the coffee powder in the tank to obtain a primary filtered extract with increased concentration, and the primary filtered extract is pushed to the end of the No. 8 tank extraction, so that the coffee extract and products thereof have full aroma, Low acidity, mellow taste, softness and sweet taste.
Description
Technical Field
The invention belongs to the technical field of coffee extraction, and particularly relates to a high-concentration coffee extract extraction system and an extraction method.
Background
With the rising trend of coffee consumption, the yield, the output value and the consumption of coffee are the first in three beverages in the world. The raw coffee beans have no fragrance, and the fragrance and taste components of the raw coffee beans are derived from the change of chemical components in the roasting process of the coffee beans. The coffee aroma and taste are better released by grinding and extracting the roasted coffee beans.
The starbucks which are often used for releasing the exploded products are cold-extraction iced coffee sold in the market in the North America in 2015, the hot tide of the cold-extraction coffee is raised, and new cold-extraction coffee is continuously released by domestic large brands in nearly two years under the influence of the hot tide. The appearance of various ready-to-drink cold-extract coffee drinks meets the requirements of consumers for tasting anytime and anywhere, and is not limited to experience only by sitting in a store.
The coffee extract is used as a raw material of a high-quality coffee product, a high-temperature extraction process is mostly adopted in the traditional extract products in China at present, and the final finished product has the defects of bad foreign flavor and peculiar smell, sharp sour flavor and unsmooth feeling, heavy bitter taste and the like due to the high temperature of the extraction process. As the market demand changes, the coffee extract with better taste needs to be selected. And the coffee extract and the product thereof have rich and full aroma, low acidity, mellow mouthfeel, softness and sweet aftertaste. Therefore, the invention provides a high-concentration coffee extract extraction system and an extraction method, which aim to solve the problems in the prior art.
Disclosure of Invention
The present invention is directed to a system and a method for extracting a high concentration coffee extract, so as to solve the above problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-strength coffee extract extraction system, the extraction system comprising: the device comprises a powder bin, a feeding module, a continuous extraction module, a condensation and filtration treatment module, a centrifugal module and a sterilization module;
the powder bin and feeding module comprises a powder storage bin and a feeding conveyor, the discharge end of the powder storage bin is fixed with the feeding end of the feeding conveyor, an automatic weighing device is arranged inside the powder storage bin, a chain type conveying belt is arranged inside the feeding conveyor, and the discharge end of the feeding output device is connected to a pipeline of a feeding pipe at the top of an extraction tank set in the continuous extraction module;
the connecting type extraction module comprises a homogenizer and an extraction tank group, the extraction tank group consists of 8-sleeve type extraction tanks, the top of each extraction tank is provided with a water inlet communicated with a jacket, a liquid outlet is formed in the lower side of a top cover of each extraction tank, a 60-mesh filter is arranged between the lower sides of the top cover and the liquid outlet inside each extraction tank, the lower sides of the extraction tanks are provided with liquid inlets, the liquid inlets are fixedly connected with an output port of the homogenizer through pipelines, the bottoms of the extraction tanks are provided with slag discharge ports, slag discharge pipelines are connected to the slag discharge ports, and the liquid outlets of the extraction tank groups are connected to inlets at the lower ends of condensing tubes in the condensation filtration processing module through pipelines;
the condensation and filtration treatment module comprises a condensation pipe and a first collecting barrel, wherein the lower end of an inlet of the condensation pipe is a cold water inlet, the upper end of an outlet of the condensation pipe is a cold water outlet, condensed water enters from a water inlet at the lower end of the condensation pipe, and exits from a water outlet at the upper end of the condensation pipe, so that heat exchange is carried out on extracting solution led into the condensation pipe by the extraction tank group in a pipeline of the condensation pipe, the extracting solution is cooled to 0-10 ℃, then the extracting solution is led into a 100-mesh filter through an outlet at the upper end of the condensation pipe, an output end pipeline of the 100-mesh filter is connected onto a feed inlet at the top of the first collecting barrel, a liquid outlet is formed in the bottom of one side of the first collecting barrel, and;
the centrifugal module comprises a disc centrifuge and a second collecting barrel, a liquid outlet is formed in the side edge of the upper end of a rotary drum of the disc centrifuge, a slag discharge port is formed in the lower end of the rotary drum of the disc centrifuge, flushing nozzle systems are installed above the rotary drum of the disc centrifuge and at the slag discharge port, the liquid outlet in the side face of the rotary drum of the disc centrifuge is connected to a feed inlet in the top of the second collecting barrel through a pipeline, a liquid outlet is formed in the bottom of one side of the second collecting barrel, and the liquid outlet is connected to a feed inlet of a UHT plate type sterilization machine in the sterilization module through a pipeline;
the sterilization module comprises a UHT plate type sterilization machine and a sterilization tank, the extracting solution centrifuged by the centrifugal module enters the UHT plate type sterilization machine through a pipeline, the extracting solution exchanges heat with sterilized high-temperature materials in the UHT plate type sterilization machine, the sterilizing temperature is reached through steam heating, the effective sterilization time is reached through controlling the flow rate through the heat preservation pipe, so that sterilization is finished, the sterilized extracting solution is guided into the sterilization tank through the pipeline, and a 120-mesh filter is arranged on a liquid outlet of the sterilization tank, so that the high-concentration coffee extracting solution is obtained.
As a further scheme of the invention: the 60-mesh filter is an annular filter without a top part and a top part, and the 60-mesh filter is attached to the inner tank body of the extraction tank.
As a still further scheme of the invention: the homogenizer applies 2-4MPa pressure when controlling the flow velocity of water flow, ensures that pure water can enter from the lower side of the extraction tank at uniform speed after passing through the homogenizer after each tank reaches the required temperature, and reversely and fully extracts the essence components in the coffee powder from bottom to top.
As a still further scheme of the invention: in the extraction process of the 8-sleeve extraction tank in the extraction tank group, the primary filtering extracting solution is obtained from the coffee powder in the lower extraction tank to the coffee powder in the upper extraction tank of the pure water entering the No. 1 extraction tank, and the primary filtering extracting solution with the increased concentration is obtained from the coffee powder entering the No. 2 extraction tank from the lower extraction tank to the upper extraction tank, so that the extraction is carried out until the extraction of the No. 8 tank is finished.
As a still further scheme of the invention: the condenser pipe is composed of an outer layer, a jacket and an inner pipeline, and the condenser pipe is a pipe type heat exchanger.
As a still further scheme of the invention: the rotary drum of the disk centrifuge is arranged at the upper end of the vertical shaft and is connected with the output end of the motor through the transmission device, a group of disks which are mutually overlapped and leave gaps are arranged in the rotary drum, the disks can shorten the settling distance of a solid phase and enlarge the settling area of the rotary drum, the process is simple, convenient and efficient, and the production capacity of the centrifuge is greatly improved.
As a still further scheme of the invention: the UHT plate type sterilization machine comprises a plate type heat exchanger, a heat preservation pipe and a shell-and-tube type heat exchanger.
As a still further scheme of the invention: a method for extracting high-concentration coffee extract comprises the following steps:
the method comprises the following steps: stock preparation
Receiving a computer instruction of a powder bin system through an automatic weighing device in a powder storage bin, and automatically weighing the required quantity of coffee powder of each tube, namely 50-100kg, wherein the coffee powder is pushed to the top of the No. 1 extraction tank of the extraction tank group one by one through a chain type conveying belt in a feeding conveyor and is put into the extraction tank group;
step two: low temperature extraction
Setting the temperature in the extraction tank to 20-40 ℃, applying 2-4Mpa to pure water through a homogenizer to control the water flow speed to 15-25L/min, feeding the pure water from the lower side of the No. 1 extraction tank at a uniform speed, reversely and fully extracting essence components in the coffee powder from bottom to top, then flowing out from a liquid outlet with a 60-mesh filter to obtain a primary filtering extracting solution, feeding the primary filtering extracting solution into the No. 2 extraction tank from bottom to top to obtain the coffee powder with increased concentration, and sequentially flowing through the No. 8 extraction tank according to the flow until the extraction is finished, or finishing when the product concentration meets the requirement, wherein the extraction time of each tank is 15-25 min;
step three: low temperature cooling and filtering
The coffee extract from the extraction tank group flows through the pipeline in the condensation pipe through the pipeline for heat exchange, and the extract is quickly cooled to 0-10 ℃ by quickly transferring heat and taking away high temperature by circulating cold water, then flows through an external 100-mesh filter and enters a first collection barrel.
Step four: centrifugation
The coffee extracting solution enters the rotary drum from the first collecting barrel through a pipeline from a feed pipe of the disc type centrifugal machine, the centrifugal rotating speed is controlled at 6000-10000r/min, the extracting solution flows through the gap of the disc, under the centrifugal action caused by the high-speed rotation of the rotary drum, a solid phase heavier than the liquid is settled on the disc to form sediment, the sediment is accumulated at the position with the largest inner diameter of the rotary drum after sliding and separating along the surface of the disc, the sediment is discharged from a sediment discharge port at regular time according to set time, and the separated light liquid is discharged from a liquid outlet and enters the second collecting barrel.
Step five: sterilization
The centrifuged coffee extract enters a plate heat exchanger of a UHT plate type sterilization machine through a pipeline, flows through the left part of the heat exchanger, exchanges heat with sterilized high-temperature materials, is preliminarily preheated to 40-60 ℃, then flows through the right part of the heat exchanger, is heated to sterilization temperature through steam, the temperature is controlled to be above 95 ℃, the flow rate is controlled to be 1300 plus materials/h, the time of flowing through a heat preservation pipe reaches sterilization aging, so that the sterilization effect is achieved, then flows through a shell-and-tube heat exchanger for heat exchange and cooling, reaches the required discharge temperature, namely below 10 ℃, and enters a sterilization tank, and the extract flows through a 120-mesh filter at the liquid outlet of the sterilization tank, so that the high-concentration coffee extract is obtained.
Compared with the prior art, the invention has the beneficial effects that: the process flow of the high-concentration coffee extract comprises the steps of material preparation, low-temperature extraction, low-temperature cooling, filtration, centrifugation, sterilization and the like;
the computer of the powder bin system receives the instruction in the material preparation process, coffee powder with qualified mesh and set weight can be automatically weighed, and the coffee powder is pushed to the top of the extraction tank group to be fed through the chain type conveying belt in the feeding conveyor, so that automatic material preparation in the coffee powder extraction process is realized, and the labor intensity of operators is reduced;
in the process flows of low-temperature extraction, low-temperature cooling and filtration, the flow velocity of water flow is controlled by a homogenizer, 2-4MPa pressure is applied, pure water can enter from the lower side of an extraction tank at uniform speed after passing through the homogenizer, the essential components in the coffee powder are extracted reversely and fully from bottom to top, an extraction tank group is a continuous extraction tank, namely, the pure water entering into the No. 1 extraction tank extracts the coffee powder in the tank from bottom to top to obtain a primary filtering extraction solution, the primary filtering extraction solution with increased concentration is extracted from bottom to top by entering into the No. 2 extraction tank through a pipeline, the extraction is finished by pushing to the No. 8 tank, the extraction solution extracted by the continuous superposition extraction system meets the high-concentration requirement, and the extraction precision of the coffee liquid is higher;
in the centrifugal process, the extracting solution flows through the gaps of the discs, under the centrifugal action caused by high-speed rotation of the rotary drum, solid phase heavier than the liquid is settled on the discs to form sediments, the sediments are accumulated on the part with the largest inner diameter of the rotary drum after sliding and separating along the surfaces of the discs, and are discharged from the residue discharge port at regular time according to set time, so that the directional collection of the coffee waste residues is completed;
in the sterilization process, the extracting solution exchanges heat with sterilized high-temperature materials in a UHT plate type sterilizer, the sterilizing temperature is reached through steam heating, and the extracting solution flows through a heat preservation pipe to control the flow rate to reach the effective sterilizing time, so that the sterilization is finished, and the flavor stability and the edible safety of the product are ensured;
the obtained coffee extract and its product have rich and full fragrance, low acidity, mellow taste, and good taste.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a flow diagram of an extraction system.
FIG. 2 is a schematic diagram of an extraction apparatus in the extraction system.
In the figure: the device comprises a powder storage bin 101, a feeding conveyor 102, a homogenizer 201, an extraction tank set 202, a condensation pipe 301, a first collection barrel 302, a disk centrifuge 401, a second collection barrel 402, a UHT plate sterilizer 501 and a sterilization tank 502.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, in an embodiment of the present invention, a high concentration coffee extract extracting system includes: the device comprises a powder bin, a feeding module, a continuous extraction module, a condensation and filtration treatment module, a centrifugal module and a sterilization module;
the powder bin and feeding module comprises a powder storage bin 101 and a feeding conveyor 102, the discharging end of the powder storage bin 101 is fixed with the feeding end of the feeding conveyor 102, an automatic weighing device is arranged inside the powder storage bin 101, a chain type conveying belt is arranged inside the feeding conveyor 102, the discharging end of the feeding output device 102 is connected to a pipeline of a feeding pipe at the top of an extraction tank group 202 in the continuous extraction module, a computer of the powder bin system receives an instruction to automatically weigh coffee powder with qualified mesh and set weight, and the coffee powder is pushed to the top of the extraction tank group 201 to be fed through the chain type conveying belt inside the feeding conveyor 102;
the connection type extraction module comprises a homogenizer 201 and an extraction tank group 202, the extraction tank group 202 is composed of 8-sleeve type extraction tanks, the top of the extraction tank is provided with a water inlet communicated with a jacket, a liquid outlet is arranged on the lower side of a top cover of the extraction tank, a 60-mesh filter is arranged between the lower side of the top cover and the liquid outlet inside the extraction tank, the lower side of the extraction tank is provided with a liquid inlet, the liquid inlet is fixedly connected with an output port of the homogenizer 201 through a pipeline, the bottom of the extraction tank is provided with a slag discharge port, the slag discharge port is connected with a slag discharge pipeline, the liquid outlet of the extraction tank group 202 is connected to an inlet at the lower end of a condensing pipe 301 in the condensation and filtration processing module through a pipeline, the homogenizer 201 controls the flow rate, and applies 2-4MPa pressure to ensure that pure water can enter from the lower side of the extraction tank at uniform, the method comprises the following steps of reversely and fully extracting the essential components in the coffee powder from bottom to top, wherein an extraction tank group is a continuous extraction tank, namely, pure water entering into a No. 1 extraction tank extracts the coffee powder in the tank from bottom to top to obtain a primary filtering extracting solution, then the pure water enters into a No. 2 extraction tank through a pipeline to extract the coffee powder in the tank from bottom to top to obtain the primary filtering extracting solution with increased concentration, and the extraction is finished when the extraction in the No. 8 tank is finished, and the extracting solution obtained through the extraction of the continuous superposition extraction system meets the requirement of high concentration;
the condensation and filtration processing module comprises a condensation pipe 301 and a first collection barrel 302, wherein the lower end of an inlet of the condensation pipe 301 is a cold water inlet, the upper end of an outlet of the condensation pipe 301 is a cold water outlet, condensed water enters from a water inlet at the lower end of the condensation pipe 301, and a water outlet at the upper end of the condensation pipe 301 is discharged, so that heat exchange is carried out on extracting solution led into the condensation pipe 301 by the extraction tank group 202 in a pipeline of the condensation pipe 301, the extracting solution is cooled to 0-10 ℃, then the extracting solution is led into a 100-mesh filter through a pipeline from an outlet at the upper end of the condensation pipe 301, an output end pipeline of the 100-mesh filter is connected to a feed port at the top of the first collection barrel 302, a liquid outlet is formed in the bottom of one side of the first collection barrel 302;
the centrifugal module comprises a disc centrifuge 401 and a second collecting barrel 402, wherein a liquid outlet is formed in the side edge of the upper end of a rotary drum of the disc centrifuge 401, a slag discharge port is formed in the lower end of the rotary drum of the disc centrifuge 401, flushing nozzle systems are installed above the rotary drum of the disc centrifuge 401 and at the slag discharge port, the liquid outlet on the side surface of the rotary drum of the disc centrifuge 401 is connected to a feed inlet at the top of the second collecting barrel 402 through a pipeline, a liquid outlet is formed in the bottom of one side of the second collecting barrel 402 and is connected to a feed inlet of a UHT plate type sterilization machine 501 in the sterilization module through a pipeline, namely, an extracting solution enters the rotary drum of the disc centrifuge 401 from the first collecting barrel 302 through a pipeline and flows through a disc gap, a solid phase heavier than liquid is settled onto the disc to form settled slag, and the settled slag is accumulated at the position with the largest diameter in the rotary drum after sliding and separating, the liquid is discharged from the slag discharge port at regular time according to set time, and the separated liquid is discharged from the liquid outlet and enters a second collecting barrel 402
The sterilization module comprises a UHT plate type sterilization machine 501 and a sterilization tank 502, the extracting solution centrifuged by the centrifugal module enters the UHT plate type sterilization machine 501 through a pipeline, the extracting solution is subjected to heat exchange with sterilized high-temperature materials in the UHT plate type sterilization machine 501, the sterilizing temperature is reached through steam heating, the extracting solution flows through a heat preservation pipe, the effective sterilization time is reached through controlling the flow rate, so that the sterilization is finished, the sterilized extracting solution is led into the sterilization tank 502 through a pipeline, and a 120-mesh filter is arranged on a liquid outlet of the sterilization tank 502, so that the high-concentration coffee extracting solution is obtained.
The 60-mesh filter is an annular filter without a top part and a top part, and the 60-mesh filter is attached to the inner tank body of the extraction tank.
The homogenizer 201 applies a pressure of 2-4MPa while controlling the flow rate of water, so that pure water can enter from the lower side of the extraction tank at a uniform speed after passing through the homogenizer after each tank reaches a required temperature, and essence components in the coffee powder are extracted reversely and fully from bottom to top.
In the extraction process of the 8-sleeve extraction tank in the extraction tank group 202, the primary filtering extracting solution is obtained from the coffee powder in the lower extraction tank to the coffee powder in the upper extraction tank of the pure water entering the No. 1 extraction tank, and then the primary filtering extracting solution with the increased concentration is obtained from the coffee powder entering the No. 2 extraction tank from the lower extraction tank to the upper extraction tank, so that the process is carried out until the extraction of the No. 8 tank is finished.
The condensation pipe 301 is composed of an outer layer, a jacket and an inner pipeline, and the condensation pipe 301 is a pipe type heat exchanger.
The rotary drum of the disc type centrifuge 401 is arranged at the upper end of the vertical shaft and is connected with the output end of the motor through a transmission device, a group of discs which are mutually overlapped and leave gaps are arranged in the rotary drum, the discs can shorten the settling distance of a solid phase and enlarge the settling area of the rotary drum, the disc type centrifuge is simple, convenient and efficient, and the production capacity of the centrifuge is greatly improved.
The UHT plate sterilizer 501 comprises a plate heat exchanger, a heat preservation pipe and a shell-and-tube heat exchanger.
Example one
A method for extracting high-concentration coffee extract comprises the following steps:
the method comprises the following steps: stock preparation
Receiving a computer instruction of a powder bin system through an automatic weighing device in the powder storage bin 101 to automatically weigh 80kg of coffee powder required by each tube, and pushing the coffee powder to the top of the No. 21 extraction tank of the extraction tank group one by one through a chain type conveying belt in the feeding conveyor 102 and putting the coffee powder into the extraction tank group;
step two: low temperature extraction
Setting the temperature in the extraction tank to 30 ℃, applying 2-4Mpa to pure water through a homogenizer 201 to control the water flow speed to be 20L/min, enabling the pure water to enter from the lower side of the No. 1 extraction tank at a uniform speed, reversely and fully extracting essence components in the coffee powder from bottom to top, then enabling the pure water to flow out of a liquid outlet with a 60-mesh filter to obtain a primary filtering extracting solution, enabling the primary filtering extracting solution to enter the No. 2 extraction tank through a pipeline, reversely extracting the coffee powder from bottom to top to obtain a primary filtering extracting solution with increased concentration, sequentially flowing through the No. 8 extraction tank according to the flow, and extracting until the product concentration meets the requirement, wherein the extraction time of each extraction tank is 20 min;
step three: low temperature cooling and filtering
The coffee extracting solution flows out of the extracting tank group 202 through a pipeline and flows through the pipeline in the condensing pipe 301 for heat exchange, the circulating cold water carries away high temperature through rapid heat transfer, the extracting solution is rapidly cooled to 5-8 ℃, and then flows through an external 100-mesh filter and enters a first collecting barrel 302.
Step four: centrifugation
Coffee extracting solution enters the rotary drum from a first collecting barrel 302 through a pipeline by a feed pipe of a disc type centrifuge 401, the centrifugal speed is controlled at 8000r/min, the extracting solution flows through a disc gap, a solid phase heavier than the liquid is settled on the disc to form sediment under the centrifugal action caused by high-speed rotation of the rotary drum, the sediment is accumulated at the position with the largest inner diameter of the rotary drum after sliding and separating along the surface of the disc, the sediment is discharged from a sediment discharge port at regular time according to set time, and separated light liquid is discharged from a liquid outlet and enters a second collecting barrel 402.
Step five: sterilization
The centrifuged coffee extract enters a plate heat exchanger of a UHT plate type sterilization machine 501 through a pipeline, flows through the left part of the heat exchanger, exchanges heat with sterilized high-temperature materials, is preheated to 50 ℃ initially, then flows through the right part of the heat exchanger, is heated by steam to reach sterilization temperature, is controlled at 110 ℃, and then flows through a heat preservation pipe at a flow rate of 1500L/h to reach sterilization aging time, so that the sterilization effect is achieved, then flows through a shell-and-tube heat exchanger to exchange heat and cool to reach the required discharge temperature, namely 5-8 ℃, and enters a sterilization tank 502, and the extract flows through a 120-mesh filter from a liquid outlet of the sterilization tank 502, so that the high-concentration coffee extract is obtained.
Example two
A method for extracting high-concentration coffee extract comprises the following steps:
the method comprises the following steps: stock preparation
The required quantity of each tube of coffee powder is automatically weighed by receiving a computer instruction of a powder bin system through an automatic weighing device in the powder storage bin 101, and the coffee powder is pushed to the top of the No. 21 extraction tank of the extraction tank group one by one through a chain type conveying belt in a feeding conveyor 102 and is put into the extraction tank group;
step two: low temperature extraction
Setting the temperature in the extraction tank to 30 ℃, applying 2-4Mpa to pure water through a homogenizer 201 to control the water flow speed to be 15L/min, enabling the pure water to enter from the lower side of the No. 1 extraction tank at a uniform speed, reversely and fully extracting essence components in the coffee powder from bottom to top, then enabling the pure water to flow out of a liquid outlet with a 60-mesh filter to obtain a primary filtering extracting solution, enabling the primary filtering extracting solution to enter the No. 2 extraction tank through a pipeline, reversely extracting the coffee powder in the No. 8 extraction tank from bottom to top to obtain a primary filtering extracting solution with increased concentration, sequentially flowing through the extraction tank according to the flow until the extraction is finished in the No. 8 extraction tank, or finishing the extraction until the product;
step three: low temperature cooling and filtering
The coffee extract from the extraction tank group 202 flows through the pipeline in the condensation pipe 301 for heat exchange, and through rapid heat transfer, circulating cold water takes away high temperature, the extract is rapidly cooled to 0-5 ℃, and then flows through an external 100-mesh filter and enters the first collection barrel 302.
Step four: centrifugation
Coffee extracting solution enters the rotary drum from a first collecting barrel 302 through a pipeline by a feed pipe of a disc type centrifuge 401, the centrifugal speed is controlled at 6000r/min, the extracting solution flows through a disc gap, a solid phase heavier than the liquid is settled on the disc to form sediment under the centrifugal action caused by high-speed rotation of the rotary drum, the sediment is accumulated at the position with the largest diameter in the rotary drum after sliding and separating along the surface of the disc, the sediment is discharged from a sediment discharge port at regular time according to set time, and separated light liquid is discharged from a liquid outlet and enters a second collecting barrel 402.
Step five: sterilization
The centrifuged coffee extract enters a plate heat exchanger of a UHT plate type sterilization machine 501 through a pipeline, flows through the left part of the heat exchanger, exchanges heat with sterilized high-temperature materials, is preheated to 40-60 ℃ initially, then flows through the right part of the heat exchanger, is heated by steam to reach sterilization temperature, is controlled at 100 ℃, and then flows through a heat preservation pipe at a flow rate of 1300L/h to reach sterilization aging time, so that the sterilization effect is achieved, then flows through a shell-and-tube heat exchanger to carry out heat exchange and cooling to reach the required discharge temperature, namely 0-5 ℃, enters a sterilization tank 502, and then flows through a 120-mesh filter from a liquid outlet of the sterilization tank 502, so that the high-concentration coffee extract is obtained.
EXAMPLE III
A method for extracting high-concentration coffee extract comprises the following steps:
the method comprises the following steps: stock preparation
The required quantity of coffee powder of each tube is automatically weighed by receiving a computer instruction of a powder bin system through an automatic weighing device in a powder storage bin 101, and the coffee powder is pushed to the top of the No. 21 extraction tank of the extraction tank group one by one through a chain type conveying belt in a feeding conveyor 102 and is put into the extraction tank group;
step two: low temperature extraction
Setting the temperature in the extraction tank to 40 ℃, applying 2-4Mpa to pure water through a homogenizer 201 to control the water flow speed to 25L/min, enabling the pure water to enter from the lower side of the No. 1 extraction tank at a uniform speed, reversely and fully extracting essence components in the coffee powder from bottom to top, then enabling the pure water to flow out of a liquid outlet with a 60-mesh filter to obtain a primary filtering extracting solution, enabling the primary filtering extracting solution to enter the No. 2 extraction tank through a pipeline, reversely extracting the coffee powder in the No. 8 extraction tank from bottom to top to obtain a primary filtering extracting solution with increased concentration, sequentially flowing through the extraction tank according to the flow until the extraction is finished in the No. 8 extraction tank, or finishing the extraction until the product concentration;
step three: low temperature cooling and filtering
The coffee extracting solution flows out of the extracting tank group 202 through a pipeline and flows through the pipeline in the condensing pipe 301 for heat exchange, the circulating cold water carries away high temperature through rapid heat transfer, the extracting solution is rapidly cooled to 8-10 ℃, and then flows through an external 100-mesh filter and enters a first collecting barrel 302.
Step four: centrifugation
Coffee extracting solution enters the rotary drum from a first collecting barrel 302 through a pipeline by a feed pipe of a disc type centrifuge 401, the centrifugal speed is controlled at 10000r/min, the extracting solution flows through a gap of a disc, a solid phase heavier than the liquid is settled on the disc to form sediment under the centrifugal action caused by high-speed rotation of the rotary drum, the sediment is accumulated at the position with the largest inner diameter of the rotary drum after sliding and separating along the surface of the disc, the sediment is discharged from a sediment discharge port at regular time according to set time, and separated light liquid is discharged from a liquid outlet and enters a second collecting barrel 402.
Step five: sterilization
The centrifuged coffee extract enters a plate heat exchanger of the UHT plate type sterilization machine 501 through a pipeline, flows through the left part of the heat exchanger, exchanges heat with sterilized high-temperature materials, is preheated to 60 ℃ initially, then flows through the right part of the heat exchanger, is heated to sterilization temperature through steam, is controlled at 120 ℃, and then flows through a heat preservation pipe at a flow rate of 1700L/h to achieve sterilization aging time, thereby achieving sterilization effect, then flows through a shell-and-tube heat exchanger to perform heat exchange and cooling to reach the required discharge temperature, namely 8-10 ℃, enters a sterilization tank 502, and then flows through a 120-mesh filter from a liquid outlet of the sterilization tank 502, thereby obtaining the high-concentration coffee extract.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (8)
1. A high-strength coffee extract extraction system, the extraction system comprising: the device comprises a powder bin, a feeding module, a continuous extraction module, a condensation and filtration treatment module, a centrifugal module and a sterilization module;
the powder bin and feeding module comprises a powder storage bin (101) and a feeding conveyor (102), the discharging end of the powder storage bin (101) is fixed with the feeding end of the feeding conveyor (102), an automatic weighing device is arranged inside the powder storage bin (101), a chain type conveying belt is arranged inside the feeding conveyor (102), and the discharging end of the feeding output device (102) is connected to a pipeline of a feeding pipe at the top of an extraction tank group (202) in the continuous extraction module;
the connecting type extraction module comprises a homogenizer (201) and an extraction tank set (202), the extraction tank set (202) consists of 8-sleeve type extraction tanks, the top of each extraction tank is provided with a water inlet communicated with a jacket, a liquid outlet is formed in the lower side of a top cover of each extraction tank, a 60-mesh filter is arranged between the lower sides of the top cover and the liquid outlet in each extraction tank, the lower sides of the extraction tanks are provided with liquid inlets, the liquid inlets are fixedly connected with an output port of the homogenizer (201) through pipelines, the bottoms of the extraction tanks are provided with slag discharge ports, slag discharge pipelines are connected to the slag discharge ports, and the liquid outlets of the extraction tank set (202) are connected to inlets at the lower ends of condensing pipes (301) in the condensation and filtration processing module through pipelines;
the condensation filtration treatment module comprises a condensation pipe (301) and a first collecting barrel (303), the lower end of the inlet of the condensing pipe (301) is a cold water inlet, the upper end of the outlet of the condensing pipe (301) is a cold water outlet, condensed water enters from the water inlet at the lower end of the condensing pipe (301), the water outlet at the upper end of the condensing pipe (301) is discharged, heat exchange is carried out on the extracting solution guided into the condensing pipe (301) by the extracting tank group (202) in the pipeline of the condensing pipe (301), the extracting solution is cooled to 0-10 ℃, and then the extracting solution is guided into a 100-mesh filter through the outlet at the upper end of the condensing pipe (301), an output end pipeline of the 100-mesh filter is connected to a feed inlet at the top of the first collecting barrel (303), a liquid outlet is formed in the bottom of one side of the first collecting barrel (303), and the liquid outlet is connected with a rotary drum feed inlet of a disc type centrifuge (401) in the centrifugal module through a pipeline;
the centrifugal module comprises a disc centrifuge (401) and a second collecting barrel (402), a liquid outlet is formed in the side edge of the upper end of a rotary drum of the disc centrifuge (401), a slag discharge port is formed in the lower end of the rotary drum of the disc centrifuge (401), flushing nozzle systems are installed above the rotary drum and at the slag discharge port of the disc centrifuge (401), the liquid outlet in the side face of the rotary drum of the disc centrifuge (401) is connected to a feed inlet in the top of the second collecting barrel (402) through a pipeline, a liquid outlet is formed in the bottom of one side of the second collecting barrel (402), and the liquid outlet is connected to a feed inlet of a UHT plate type sterilization machine (501) in the sterilization module through a pipeline;
the sterilization module comprises a UHT plate type sterilization machine (501) and a sterilization tank (502), the extracting solution centrifuged by the centrifugal module enters the UHT plate type sterilization machine (501) through a pipeline, the extracting solution is subjected to heat exchange with sterilized high-temperature materials in the UHT plate type sterilization machine (501), the sterilizing temperature is reached through steam heating, the extracting solution flows through a heat preservation pipe, the effective sterilization time is reached through controlling the flow rate, the sterilization is finished, the sterilized extracting solution is led into the sterilization tank (502) through the pipeline, and a 120-mesh filter is arranged on a liquid outlet of the sterilization tank (502), so that the high-concentration extracting solution of coffee is obtained.
2. The high-gravity coffee extract extraction system of claim 1, wherein the 60 mesh filter is an annular filter without a top and a bottom, and the 60 mesh filter is attached to the inner tank of the extraction tank.
3. A high concentration coffee extract extraction system as claimed in claim 1, wherein said homogenizer (201) is controlled in the flow rate of water and applies a pressure of 2-4 MPa.
4. The high concentration coffee extraction system as claimed in claim 1, wherein the 8-tube extraction tank in the extraction tank set (202) is configured to extract pure water from the bottom to the top of the extraction tank into the primary filtered extraction solution from the coffee powder in the 1 st extraction tank, and then to extract coffee powder from the bottom to the top of the extraction tank into the 2 nd extraction tank into the primary filtered extraction solution with increased concentration from the bottom to the top of the extraction tank, and so on until the extraction in the 8 th tank is completed.
5. The extraction system and the extraction method of high concentration coffee extract as claimed in claim 1, wherein the condensation pipe (301) is composed of an outer layer, a jacket and an inner pipeline, and the condensation pipe (301) is a pipe heat exchanger.
6. The high concentration coffee extract extraction system of claim 1, wherein the bowl of the disk centrifuge (401) is mounted on the upper end of the vertical shaft and is connected to the output of the motor through a transmission device, and a set of disks are nested inside the bowl with gaps.
7. The high-concentration coffee extract extraction system of claim 1, wherein said UHT plate sterilizer (501) comprises a plate heat exchanger, a thermal insulation tube and a shell-and-tube heat exchanger.
8. The extraction method of the high-concentration coffee extract is characterized by comprising the following steps of:
the method comprises the following steps: stock preparation
Receiving a computer instruction of a powder bin system through an automatic weighing device in a powder storage bin (101) to automatically weigh the required amount of coffee powder of each tube, namely 50-100kg, wherein the coffee powder is pushed to the top of the No. 1 extraction tank of the extraction tank group (2) one by one through a chain type conveying belt in a feeding conveyor (102) and is put into the extraction tank group;
step two: low temperature extraction
Setting the temperature in the extraction tank to 20-40 ℃, applying 2-4Mpa to pure water through a homogenizer (201) to control the water flow speed to 15-25L/min, feeding the pure water from the lower side of the No. 1 extraction tank at a uniform speed, reversely and fully extracting essence components in the coffee powder from bottom to top, then flowing out from a liquid outlet with a 60-mesh filter to obtain a primary filtering extracting solution, feeding the primary filtering extracting solution into the No. 2 extraction tank from bottom to top to obtain the primary filtering extracting solution with increased concentration, and sequentially flowing through the No. 8 extraction tank according to the flow until the extraction is finished or the product concentration meets the requirement, wherein the extraction time of each tank is 15-25 min;
step three: low temperature cooling and filtering
Coffee extract flows out of the extraction tank group (202) through a pipeline and flows through an inner pipeline of the condensation pipe (301) for heat exchange, the high temperature is taken away by circulating cold water through rapid heat transfer, the extract is rapidly cooled to 0-10 ℃, then flows through an external 100-mesh filter and enters a first collection barrel (302).
Step four: centrifugation
The coffee extracting solution enters the rotary drum from a feeding pipe of a disc type centrifuge (401) through a pipeline from a first collecting barrel (302), the centrifugal rotating speed is controlled at 6000-10000r/min, the extracting solution flows through the gaps of the discs, a solid phase heavier than the liquid is settled on the discs to form sediments under the centrifugal action caused by the high-speed rotation of the rotary drum, the sediments are accumulated at the position with the largest inner diameter of the rotary drum after sliding and separating along the surfaces of the discs, the sediments are discharged from a residue discharge port at regular time according to set time, and separated light liquid is discharged from a liquid outlet and enters a second collecting barrel (402).
Step five: sterilization
The centrifuged coffee extract enters a plate heat exchanger of a UHT plate type sterilization machine (501) through a pipeline, flows through the left part of the heat exchanger, exchanges heat with sterilized high-temperature materials, is preheated to 40-60 ℃ initially, flows through the right part of the heat exchanger, is heated by steam to reach sterilization temperature which is controlled to be above 95 ℃, flows through a heat preservation pipe at a flow rate of 1300 plus 1700L/h to reach sterilization aging time, achieves sterilization effect, flows through a shell type heat exchanger to exchange heat and reduce temperature to reach the required discharge temperature, namely below 10 ℃, and enters a sterilization tank (502), and then flows through a liquid outlet of the sterilization tank (502) to pass through a 120-mesh filter, so that the high-concentration coffee extract is obtained.
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| CN112473174A (en) * | 2020-12-09 | 2021-03-12 | 海南一哟食品有限公司 | Method for accelerating coffee extraction by adopting ultrasonic waves |
| CN113180132A (en) * | 2020-12-09 | 2021-07-30 | 海南一哟食品有限公司 | Coffee extraction technology based on harmless refrigerant low-temperature wall breaking technology |
| CN113995036A (en) * | 2021-11-17 | 2022-02-01 | 云南冷萃科技有限公司 | Low-temperature vacuum concentration method of coffee |
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| CN115779484A (en) * | 2022-10-13 | 2023-03-14 | 广东顺大食品调料有限公司 | Coffee liquid self-identification steady-flow ultralow-temperature extraction process and application thereof |
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