CN113712224B - Coffee bean baking system capable of controlling caffeine content and baking method thereof - Google Patents
Coffee bean baking system capable of controlling caffeine content and baking method thereof Download PDFInfo
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- CN113712224B CN113712224B CN202110976245.8A CN202110976245A CN113712224B CN 113712224 B CN113712224 B CN 113712224B CN 202110976245 A CN202110976245 A CN 202110976245A CN 113712224 B CN113712224 B CN 113712224B
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- 238000000034 method Methods 0.000 title claims abstract description 40
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- 229960001948 caffeine Drugs 0.000 title claims abstract description 31
- VJEONQKOZGKCAK-UHFFFAOYSA-N caffeine Natural products CN1C(=O)N(C)C(=O)C2=C1C=CN2C VJEONQKOZGKCAK-UHFFFAOYSA-N 0.000 title claims abstract description 31
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23N—MACHINES OR APPARATUS FOR TREATING HARVESTED FRUIT, VEGETABLES OR FLOWER BULBS IN BULK, NOT OTHERWISE PROVIDED FOR; PEELING VEGETABLES OR FRUIT IN BULK; APPARATUS FOR PREPARING ANIMAL FEEDING- STUFFS
- A23N12/00—Machines for cleaning, blanching, drying or roasting fruits or vegetables, e.g. coffee, cocoa, nuts
- A23N12/08—Machines for cleaning, blanching, drying or roasting fruits or vegetables, e.g. coffee, cocoa, nuts for drying or roasting
- A23N12/10—Rotary roasters
-
- 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
- A23F5/10—Treating roasted coffee; Preparations produced thereby
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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 belongs to the technical field of baking, and particularly relates to a coffee bean baking system capable of controlling caffeine content and a baking method thereof. Roasting means for roasting coffee beans in real time in the system; ice quenching device for carrying out real-time ice quenching on the roasted coffee beans; the freeze-drying device is used for drying the coffee beans after ice quenching in real time; and the control device is used for respectively controlling the baking device, the ice quenching device and the freeze-drying device in real time, so that the cooling time is short, the oxidation and deterioration of oil on the surface of the coffee beans are not easy to cause, meanwhile, the continuous carbonization of the coffee beans is avoided, namely, the bitter taste is reduced, the coffee beans are not easy to become crisp, the fire is not easy to cause after people drink, the quality of commercial coffee beans is improved, and the caffeine content in the coffee beans can be controlled.
Description
Technical Field
The invention belongs to the technical field of baking, and particularly relates to a coffee bean baking system capable of controlling caffeine content and a baking method thereof.
Background
At present, commercial cooked coffee beans are roasted in a roasting furnace, the temperature of the cooked coffee beans is generally 180-190 ℃ when the cooked coffee beans are taken out of the pot, then the cooked coffee beans are cooled by air, the cooling time is long, oil on the surface of the coffee beans is easy to oxidize and deteriorate, meanwhile, the coffee beans are easy to continuously carbonize, the bitter taste is increased, the coffee beans become crisp, and the cooked coffee beans are easy to cause excessive internal heat after being drunk by people, so that the quality of the commercial cooked coffee beans is influenced, and the caffeine content in the cooked coffee beans cannot be effectively controlled.
Therefore, in order to solve the above technical problems, there is an urgent need to design and develop a coffee bean roasting system capable of controlling the content of caffeine and a roasting method thereof.
Disclosure of Invention
A first object of the present invention is to provide a coffee bean roasting system capable of controlling the content of caffeine;
a second object of the present invention is to provide a coffee bean roasting method capable of controlling the content of caffeine;
the first object of the present invention is achieved by: the system specifically comprises: roasting means for roasting coffee beans in real time; ice quenching device for carrying out real-time ice quenching on the roasted coffee beans; the freeze-drying device is used for drying the coffee beans after ice quenching in real time; and a control device for controlling the operations of the baking device, the ice quenching device and the freeze-drying device in real time respectively.
The second object of the present invention is achieved by: the method specifically comprises the following steps:
weighing a certain amount of raw coffee beans, and placing the raw coffee beans in a raw bean ring storage tank;
heating the rotary drum until the temperature in the rotary drum chamber reaches a preset value, and injecting the coffee beans in the green bean ring storage tank into the heated rotary drum chamber; baking according to a preset baking process;
carrying out ice quenching treatment on the roasted coffee beans in real time;
and carrying out quick-freezing and drying treatment on the coffee beans after ice quenching in real time.
The invention provides a roasting device for roasting coffee beans in real time in the system; ice quenching device for carrying out real-time ice quenching on the roasted coffee beans; the freeze-drying device is used for drying the coffee beans after ice quenching in real time; and the control device is used for respectively controlling the operations of the baking device, the ice quenching device and the freeze-drying device in real time, so that the cooling time is short, the oxidation and deterioration of oil on the surface of the coffee beans are not easy to cause, the continuous carbonization of the coffee beans is avoided, namely, the bitter taste is reduced, the coffee beans are not easy to become crisp, the ignition is not easy to cause after people drink, the quality of the commercial cooked coffee beans is improved, and the caffeine content in the cooked coffee beans can be controlled, namely, the coffee product obtained by the process method of the scheme has dry aroma (citrus aroma and burnt aroma); wet aroma (caramel aroma); mouthfeel: mellow, smooth, balanced, rich and plump; acidity: moderate and low bitter; sweetness: medium to high; the overall aftertaste is long, and the lips and teeth keep fragrance; long shelf life and no excessive internal heat.
Drawings
FIG. 1 is a schematic diagram of a coffee bean roasting system capable of controlling caffeine content according to the present invention;
FIG. 2 is a schematic diagram showing the construction of a roasting apparatus of a coffee roasting system capable of controlling caffeine content according to the present invention;
FIG. 3 is a schematic diagram showing the construction of a hot exhaust treatment system of a coffee bean roasting system capable of controlling caffeine content according to the present invention;
FIG. 4 is a schematic view of a part of an enlarged structure of a hot exhaust treatment system device A of a coffee bean roasting system capable of controlling caffeine content according to the present invention;
FIG. 5 is a schematic view showing a part of an enlarged structure of a hot exhaust air treatment system device B of a coffee bean roasting system capable of controlling the content of caffeine according to the present invention;
FIG. 6 is a schematic diagram of a gas supply device of a coffee bean roasting system capable of controlling caffeine content according to the present invention;
FIG. 7 is a schematic diagram of a water supply apparatus of a coffee bean roasting system capable of controlling caffeine content according to the present invention;
FIG. 8 is a schematic diagram of a variety of graphs and process parameters of a coffee roasting system capable of controlling caffeine content in accordance with the present invention;
FIG. 9 is a diagram showing two kinds of graphs and process parameters of a coffee bean roasting system capable of controlling caffeine content according to the present invention;
FIG. 10 is a schematic flow chart of a method for roasting coffee beans capable of controlling the content of caffeine according to the present invention;
description of the drawings:
1-tail gas burner, 2-explosion-proof device, 3-cyclone separator; 31-a first cyclone; 32-a second cyclone; 4-silver skin compressor; a 5-burner; 6-a rotary drum; 7-a combustion chamber; 8-cooling plate; 9-cooked bean conveyor; 10-a cooked bean cache tank; 11-temporarily storing a raw bean pot; 12-a hot air circulating fan; 13-a hot air inlet elbow; 14-a drum shaft; 15-a hot air outlet; 16-raw bean trays; 17-bearings; 171-front end bearing; 172-rear end bearings; 18-front corner; 19-supporting feet; 191-front support feet; 192-rear support legs; 20-a heat preservation and insulation layer; 21-an outer layer of the rotary drum; 22-drum wall; 23-capping; 24-nut; 25-axial pauses; 26-floating bars; 27-tail slider; 28-pressure gauge; 29-pressure gauge hole; 30-a pressure reducing valve; 301-a first pressure reducing valve; 302-a second pressure relief valve; 31-a steam filter; 32-measuring point of pressure; 33-a shut-off valve; 34-a filter; 35-damper joint; 36-linker; 37-cooling water pipe; 38-an emergency water supplementing pipe; 39-a rescue water outlet pipe of the cooling disc; 40-a water outlet pipe for drum rescue; 41-a hot air pipeline rescue water outlet pipe; 42-drum rescue water, two-stage drainage pipe; 43-a first reservation pipe; 44-two-stage water supplementing pipe; 45-a second reserved pipe; 46-a pressure switch; 47-manometer.
Detailed Description
The present invention will be further described with reference to the drawings and examples, so that those skilled in the art will understand the present invention in detail, but do not limit the present invention in any way. Any alterations or modifications made in accordance with the teachings of the invention are intended to be within the scope of the invention.
The invention is further elucidated below in connection with the accompanying drawings.
As shown in fig. 1 to 10, the present invention provides a coffee bean roasting system capable of controlling the content of caffeine, the system comprising in particular: roasting means for roasting coffee beans in real time; ice quenching device for carrying out real-time ice quenching on the roasted coffee beans; the freeze-drying device is used for drying the coffee beans after ice quenching in real time; and a control device for controlling the operations of the baking device, the ice quenching device and the freeze-drying device in real time respectively.
The baking device is provided with a coffee bean tray for weighing and placing the coffee bean; a burner for providing heat for real-time baking; a burner for roasting coffee beans in real time; a drum for collecting and roasting raw coffee beans in real time; a cooling plate for cooling the roasted coffee beans in real time; a conveyor for transporting the coffee beans in real time; a cache tank for holding coffee beans.
The cache tank comprises a raw bean cache tank for collecting raw coffee beans and a cooked bean cache tank for collecting cooked coffee beans.
A weight weighing control module for controlling the weight of the raw coffee beans is arranged in the raw coffee bean tray; the weight weighing control module is provided with a weight adjustable threshold value.
A stirring container is arranged in the ice quenching device; an ice crystal generating module for generating ice crystals with the size smaller than 1mm in real time is arranged in the stirring container; the first induction reminding module is used for inducing and reminding the ice crystal content in the liquid of the stirring container in real time;
the ice crystal generation module specifically comprises: and (3) continuously and circularly treating the liquid containing the coffee oil through a good ice particle making mechanism of the refrigerating mechanism.
The freeze-drying device is internally provided with a solid-liquid separation module for carrying out solid-liquid separation on the coffee beans after ice quenching; the steel belt type quick-freezing mechanism is used for quick-freezing the coffee beans after the solid-liquid separation treatment; a refrigeration unit for providing refrigeration; a cold air mechanism for providing cold air; and a sublimation bin for performing sublimation treatment on the quick-frozen coffee beans;
and the freeze-drying device is also provided with a second induction reminding module for inducing and prompting the water content of the coffee beans after drying treatment in real time.
The system also comprises a hot exhaust air treatment device for treating baking hot exhaust air; a gas supply for providing a gas supply for the system; and a water supply for providing a water source for the baking process in real time.
The outer side of the system is also provided with a first cyclone separator and a second cyclone separator respectively; and a tail gas burner for treating the baking tail gas in real time.
The invention also provides a coffee bean roasting method capable of controlling the content of caffeine, which specifically comprises the following steps:
s1, weighing a certain amount of raw coffee beans, and placing the raw coffee beans in a raw bean ring storage tank;
s2, heating the rotary drum until the temperature in the rotary drum chamber reaches a preset value, and injecting the coffee raw beans in the raw bean ring storage tank into the heated rotary drum chamber; baking according to a preset baking process;
s3, carrying out ice quenching treatment on the roasted coffee beans in real time;
s4, quick-freezing and drying the ice-quenched coffee beans in real time.
The method comprises the following steps of carrying out ice quenching treatment on roasted coffee beans in real time: s31, continuously and circularly processing the ice particles sequentially through a refrigerating mechanism and an ice particle mechanism to generate ice crystals smaller than 1mm in real time;
the method comprises the following steps of carrying out quick-freezing and drying treatment on the ice-quenched coffee beans in real time: s41, carrying out solid-liquid separation treatment on the ice quenched coffee beans in real time; s42, quick-freezing the coffee beans after solid-liquid separation treatment, wherein the quick-freezing treatment time is 2 hours; s43, performing sublimation treatment on the quick-frozen coffee beans in real time, wherein the sublimation treatment time is 3 hours.
The invention is further elucidated below in connection with the accompanying drawings.
That is, in the present invention, there is provided a coffee bean roasting system capable of controlling the content of caffeine, in which roasting means for roasting coffee beans in real time are provided, the means including a roasting oven, an ice quenching system, a freeze-drying system, and an automatic control system, the roasting oven including a green coffee bean tray, a combustion oven, a burner, a drum, a cooling tray, a conveyor, a boiled bean buffer tank, etc. The system also comprises an ice quenching device for carrying out real-time ice quenching on the roasted coffee beans, wherein the ice quenching device comprises refrigeration equipment, ice particle making equipment and the like. The system also comprises a freeze-drying device for drying the quenched coffee beans in real time, wherein the freeze-drying device comprises a steel belt type quick-freezing device, a refrigerating unit, a cold air system, a dishing system, a sublimation bin, a vacuum unit, a trolley and the like. The system is also provided with a control device for respectively controlling the baking device, the ice quenching device and the freeze-drying device in real time.
Specifically, in the baking device, the baking furnace mainly comprises a temporary storage raw bean tank 11 (raw bean cache tank), a rotary drum 6, a rotary drum motor, a drum chamber, a combustor 5, a combustion chamber 7, a hot air circulation fan 12, a cooling fan, a cooling disc 8, a stirrer, a tail gas combustor 1, a cyclone separator 3, a silver skin compressor 4, a quenching water system, a hot air valve, a cold air valve, a cooked bean conveyor 9 (with stone removal function), a cooked bean cache tank 10, a hot air pipe, a lubricating oil centralized distributor, a monitoring system, an emergency water spraying system and the like. That is, a rotary drum 6 is connected to the outlet end of the temporary storage raw bean tank 11, a burner 5 and a combustion chamber 7 are arranged outside the rotary drum 6, one side of the combustion chamber 7 is connected to a tail gas burner 1, one end of the tail gas burner 1 is provided with a first cyclone separator 31, the first cyclone separator 31 is also connected to a silver skin compressor 4 and a hot air circulating fan 12, and preferably, the top end of the first cyclone separator 31 is provided with an explosion-proof device 2; the other end of the hot air circulating fan 12 is connected with a temporary storage raw bean tank 11 (raw bean cache tank); a cooling plate 8 is arranged at one end of the rotary drum 6, a cooked bean conveyor 9 (with stone removing function) is arranged at one end of the cooling plate 8, the cooked bean conveyor 9 conveys cooked beans to a cooked bean cache tank 10, and a second cyclone separator 32 is arranged between the cooked bean cache tank 10 and the cooling plate 8.
In other words, the baking device is provided with a machine body with a coating and a frame for operation and maintenance; a temporary storage tank with coffee bean material level detection function; a torrefaction drum and a variable frequency drive system; a coffee bean roasting temperature monitoring system; discharging the roasted coffee beans from the roasting drum to a control system; a manual sampling port and a sampling groove; an auto-ignition system; an automatic pre-cooling water quenching device in the baking drum; an automatic emergency water quenching device; a coffee roasting hot air control system; a cooling air control system; a destoner delivery system; a thermal exhaust treatment system; an automatic control system; a pipeline safety system.
Among the main components of the baking furnace device, a baking furnace drum, a fuel gas supply device of a baking system and a water supply device of the baking system are contained; wherein a first pressure reducing valve in a gas supply device of the baking system is a first-stage pressure reducing valve, and the outlet pressure is 1bar flow; the second pressure reducing valve is a two-stage pressure reducing valve with an outlet pressure of 30mbar and a flow rate of twice the required maximum flow rate.
The main parameters of the baking system are as follows: capacity: 3-600 kg/batch; baking time: 3-20 minutes/batch; energy consumption value: 498000 (-510000 Kcal/T baked beans).
Principle of baking system: the material flow comprises the following steps: raw coffee bean materials are weighed according to each batch of weight value set by a baking system, then enter a raw bean temporary storage tank, when the temperature of a rotary drum reaches a set value, a discharge valve of the temporary storage tank is opened, raw coffee beans enter the rotary drum for baking, the discharge valve of the temporary storage tank is closed after all raw coffee beans enter the rotary drum, baking is carried out according to a baking process (curve graph) preset by a control system, quenching water is carried out after completion, the raw coffee beans enter a cooling disc (the raw coffee beans enter the rotary drum again) and the cooked beans are conveyed to a ripening bin through a cooked bean conveying system after the set cooling time (the set time is set according to the cooling effect, namely the temperature) is reached.
Hot air flow: fresh air and circulating air are heated to a set temperature in a combustion chamber and enter a drum chamber, the fresh air is sent to a cyclone separator through a hot air circulating fan after baking green coffee beans, and solids such as silver skin brought out by the hot air fall on the lower part of the cyclone separator, enter a silver skin compressor through a wind blocking device, and are transported outwards after being compressed. The hot air from the upper part of the cyclone separator is divided into two paths, one path is directly discharged to the atmosphere after being combusted by a tail gas burner, the discharge of the hot air in the path is intermittent, the discharge time and the discharge volume are determined by the process, and the control system is automatically controlled. The other path of hot air circulates back to the combustion chamber, the circulating quantity and the fresh air quantity are determined by the process, and the control system is automatically controlled.
Process parameters (graph): parameters such as temperature, hot air quantity, pressure and the like in a drum of a process for roasting coffee beans are changed along with roasting time, and the coffee beans of different types and the coffee beans of different roasting degrees have different parameters such as temperature, hot air quantity, pressure, roasting time and the like, so that the corresponding parameters such as temperature, hot air quantity, pressure, roasting time and the like are set according to various processed varieties, namely, the parameters such as process curve exists in a computer, and are directly called from the computer when in use. As shown in the accompanying drawings, the method is particularly used for preparing graphs and process parameters of different varieties of embodiments.
The baking process and quality are related, and the same coffee beans are baked by different processes to obtain different qualities, which is the following specific case.
Table 1 below: baking with different process parameters.
TABLE 1 baking with different process parameters
Table 2 below: results for the different cups corresponding to Table 1 above
Table 2: results for different cups
Specifically, the baking system is used and maintained as follows, and checking before starting up: checking whether the pressure of the liquefied gas is normal; checking whether water is in a normal supply state; checking whether each motor is added with lubricating oil; checking whether the baking pan is cleaned; checking whether the cooling bed is cleaned; checking whether the steering of all motors and fans is correct; checking whether all power supplies and circuits are normal; checking whether the compressed air is in a normal supply state; turning around the baking system for one round of inspection before starting;
starting up operation: opening a computer host switch; opening a liquefied gas, water, electricity and compressed air switch; putting the weighed coffee beans into a roasting pan; setting process baking parameters;
inspection in operation: checking the color change of the roasted beans in the pot; checking whether the equipment links are loose or not, wherein the equipment links are loose to be screwed; checking whether the flow of the liquefied gas is sufficient at any time; observing the temperature change in the furnace at any time; checking whether the liquefied gas, water and compressed air are normally supplied; checking whether the deslagging system is normal;
and (3) stopping operation: closing the liquefied gas, water and compressed air valve after stopping baking; closing the computer operation host; closing a power supply and cleaning a hearth;
fault state handling and emergency shutdown: turning off the liquefied gas when a power failure occurs, turning off a control power switch, and restarting according to a starting program when an incoming call comes; if the liquefied gas is insufficient, the liquefied gas must be turned off, and the baking pan is restarted according to a starting program (the baking pan cannot be stopped) after the liquefied gas is sufficient; if the conveying pipeline is abnormal in baking, stopping preparation work is needed, and starting according to a starting operation program after the inspection is finished; if water is stopped and compressed air is low, opening a discharging door to discharge and stopping;
checking after stopping: checking whether the liquefied gas is tightly closed; checking whether the wire line is broken or not; checking the firmness degree of all the connecting devices.
In the embodiment of the invention, the freeze drying device of the system has the following technical parameters:
the design requirements are as follows: heating plate area 200m 2 The method comprises the steps of carrying out a first treatment on the surface of the Maximum charge amount 5.4m 3 The method comprises the steps of carrying out a first treatment on the surface of the Tray size and number: 538X 610X 35 mm/612; the heating mode is as follows: double-sided radiation; plate temperature adjusting range: 30-130 ℃; maximum design water capture capacity: 440kg/h; rated working vacuum: adjustable at more than 50 Pa; no-load pumping to 133 Pa: 15min; dedicated freezing store: 11.7X4.75X3 meters, 2 seats.
The structure of the vacuum freeze-drying apparatus is as follows:
the drying cabin is in a horizontal cylinder shape, is made of 304 stainless steel, has the diameter of 2560mm and the total length of 10.5m. The cabin door is a flat-open type, and two observation windows are arranged on the cabin door.
The upper part in the drying cabin is provided with a heating plate assembly, and each heating plate assembly is provided with 16 layers of heating plates which are installed in a bilateral symmetry cantilever manner. The middle is a wider passage for the feeding pulley to go in and out and for cleaning and maintaining the corridor. The heating plate is made of special hollow aluminum profiles, and is formed by argon arc welding, and the surface is subjected to special surface treatment, so that the heating plate has higher emissivity.
And the water vapor trapping and deicing system comprises: the water vapor catcher is built-in and is directly arranged at the lower part of the drying cabin, and cold traps at the left side and the right side can alternately catch water vapor and melt ice. Negative pressure steam is used for melting ice.
The heating system adopts a fully-closed constant-pressure type, and is provided with an overtemperature alarm and overpressure safety protection device. The working medium adopted by the heating system is deionized water. The heating source is steam.
And a vacuum system adopts a mechanical pump combination. The device comprises a pre-pumping unit and a vacuum unit. A matched film capacitance type vacuum gauge.
The ammonia circulation system adopts an ammonia flooded circulation system, is provided with a specially required pump ammonia separator, and is cooled by a refrigeration compressor station of a demand party according to the demand.
The air control system consists of an air compressor, an air dryer and a filter to provide dry and clean compressed air. The air distribution box with various electromagnetic combination valves and electromagnetic two-way valves is used for supplying air to the pneumatic valves and the like according to the command of the control system.
A material conveying system: the conveying track is composed of hot dip zinc No. 12 common I-steel as main body, and comprises a supporting mechanism, a switcher, a brake and the like, and can be circularly operated from loading, freezing, drying, unloading to loading room. The material containing pulley is composed of an anti-rust aluminum profile. The tray is formed by stamping an aviation rust-proof aluminum alloy.
The control system adopts a programmable controller PLC and is provided with an industrial personal computer as an upper computer for recording and storing various information and participating in network management. The control system has the sound and light alarm functions of overtemperature, overpressure, pump, valve faults and the like.
The pre-freezing system is a forced air-cooled freezing warehouse, and can simultaneously freeze the carrying materials of 8 pulleys at one time, and the circulating temperature of cold air is lower than-35 ℃. The warehouse body adopts polyurethane sandwich foam materials with the thickness of 120mm, and the panel is a plastic-sprayed color plate. The track system is connected with the material conveying system in the tunnel, and the full aluminum evaporator and the blower are side-mounted defrosting systems with water. The garage door is a push-pull type electric heating system with frost prevention.
The equipment configuration and the drying bin configuration are shown in the following table 3;
table 3 drying bin configuration
The water catcher configuration is shown in Table 4 below
Table 4 water trap configuration
The vacuum system configuration is shown in Table 5 below
Table 5 vacuum system configuration
The heating cycle configuration is shown in Table 6 below
TABLE 6 heating cycle system configuration
The control system configuration is shown in Table 7 below
Table 7 control system configuration
Quick-freezing warehouse is shown in the following table 8
Table 8 quick-freezing warehouse
The water cooling system is shown in Table 9 below
Table 9 Water Cooling System
The specific principle of the invention is as follows: raw coffee bean materials are weighed according to each batch of weight value set by a baking system, then enter a raw bean temporary storage tank, when the temperature of a rotary drum reaches a set value, a discharge valve of the temporary storage tank is opened, raw coffee beans enter the rotary drum for baking, the discharge valve of the temporary storage tank is closed after all raw coffee beans enter the rotary drum, the next batch of raw coffee beans are conveyed to the raw bean temporary storage tank again, baking is carried out according to a baking process (curve graph) preset by a control system, and the raw coffee beans directly enter a stirring container of an ice quenching system after the raw coffee beans are finished. The baking system is started, the ice quenching system is also started, the liquid containing the coffee oil in the stirring container is continuously circulated through the refrigerating equipment and the ice particle making equipment, ice crystals smaller than 1mm are continuously generated in the liquid, when the content of the ice crystals reaches 50% -70%, the concentration of the coffee oil in the liquid is improved, baked coffee beans (the temperature is 185 ℃) directly enter the stirring container, and the heat of the coffee beans is absorbed due to the fact that a large amount of ice crystals are contained in the liquid, the oil on the surface of the coffee beans is reduced to zero within 10 seconds, meanwhile, the coffee oil in the liquid is also coated on the surface of the coffee beans, oxidation of the coffee oil is avoided, ice quenching is carried out on the coffee beans, and the quality of the coffee beans is improved. The ice quenched coffee beans are directly conveyed to a steel belt type quick-freezing device after solid-liquid separation, quick-frozen for 2 hours and then put into a tray, and then the tray is pushed into a sublimation bin for 3 hours to be dried, wherein the water content of the product is less than 3%.
The invention provides a roasting device for roasting coffee beans in real time in the system; ice quenching device for carrying out real-time ice quenching on the roasted coffee beans; the freeze-drying device is used for drying the coffee beans after ice quenching in real time; and the control device is used for respectively controlling the operations of the baking device, the ice quenching device and the freeze-drying device in real time, so that the cooling time is short, the oxidation and deterioration of oil on the surface of the coffee beans are not easy to cause, the continuous carbonization of the coffee beans is avoided, namely, the bitter taste is reduced, the coffee beans are not easy to become crisp, the ignition is not easy to cause after people drink, the quality of the commercial cooked coffee beans is improved, and the caffeine content in the cooked coffee beans can be controlled, namely, the coffee product obtained by the process method of the scheme has dry aroma (citrus aroma and burnt aroma); wet aroma (caramel aroma); mouthfeel: mellow, smooth, balanced, rich and plump; acidity: moderate and low bitter; sweetness: medium to high; the overall aftertaste is long, and the lips and teeth keep fragrance; long shelf life and no excessive internal heat.
Claims (7)
1. A coffee bean roasting system capable of controlling the caffeine content, characterized in that it comprises in particular:
roasting means for roasting coffee beans in real time;
the ice quenching device is used for carrying out real-time ice quenching on the roasted coffee beans, and a stirring container is arranged in the ice quenching device; an ice crystal generation module for generating ice crystals in real time is arranged in the stirring container; the first induction reminding module is used for inducing and reminding the ice crystal content in the liquid of the stirring container in real time; the ice crystal generation module specifically comprises: continuously and circularly treating liquid containing coffee oil through a refrigerating mechanism and an ice particle mechanism in sequence;
the freeze-drying device is used for drying the ice-quenched coffee beans in real time, and a solid-liquid separation module used for carrying out solid-liquid separation on the ice-quenched coffee beans is arranged in the freeze-drying device; the steel belt type quick-freezing mechanism is used for quick-freezing the coffee beans after the solid-liquid separation treatment; a refrigeration unit for providing refrigeration; a cold air mechanism for providing cold air; and a sublimation bin for performing sublimation treatment on the quick-frozen coffee beans; the freeze-drying device is also provided with a second induction reminding module for inducing and reminding the water content of the dried coffee beans in real time;
and a control device for controlling the operations of the baking device, the ice quenching device and the freeze-drying device in real time respectively.
2. A coffee bean roasting system capable of controlling caffeine content according to claim 1, characterized in that the roasting device is provided with a coffee bean tray for weighing and placing the coffee beans; a burner for providing heat for real-time baking; a burner for roasting coffee beans in real time; a drum for collecting and roasting raw coffee beans in real time; a cooling plate for cooling the roasted coffee beans in real time; a conveyor for transporting the coffee beans in real time; a cache tank for holding coffee beans.
3. A coffee bean roasting system capable of controlling caffeine content according to claim 2, characterized in that the buffering tanks comprise a raw bean buffering tank for holding raw coffee beans and a cooked bean buffering tank for holding cooked coffee beans.
4. A coffee bean roasting system capable of controlling caffeine content according to claim 2, characterized in that the coffee bean tray is provided therein with a weight weighing control module for controlling the weight of the coffee beans; the weight weighing control module is provided with a weight adjustable threshold value.
5. A coffee bean roasting system capable of controlling caffeine content according to claim 1, characterized in that the system further comprises a hot exhaust air treatment device for treating roasting hot exhaust air; a gas supply for providing a gas supply for the system; and a water supply for providing a water source for the baking process in real time.
6. A coffee bean roasting system capable of controlling caffeine content according to claim 1, characterized in that the outside of the system is further provided with a first cyclone and a second cyclone, respectively; and a tail gas burner for treating the baking tail gas in real time.
7. A method of roasting coffee beans based on a coffee bean roasting system capable of controlling the content of caffeine according to any one of claims 1 to 6, characterized in that the method comprises the steps of:
weighing a certain amount of raw coffee beans, and placing the raw coffee beans in a raw bean cache tank; heating the rotary drum until the temperature in the rotary drum chamber reaches a preset value, and injecting the coffee beans in the green bean buffer tank into the heated rotary drum chamber; baking according to a preset baking process;
carrying out ice quenching treatment on roasted coffee beans in real time, wherein the ice quenching treatment comprises continuous cyclic treatment sequentially through a refrigerating mechanism and an ice particle mechanism, and ice crystals are generated in real time;
carrying out quick-freezing and drying treatment on the ice-quenched coffee beans in real time, wherein the quick-freezing treatment comprises the steps of carrying out solid-liquid separation treatment on the ice-quenched coffee beans in real time, and carrying out the quick-freezing treatment on the ice-quenched coffee beans for 2 hours; and carrying out sublimation treatment on the quick-frozen coffee beans in real time, wherein the sublimation treatment time is 3 hours.
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