Large combustion chamber outwardly moving hot air circulation roaster

Abstract

This utility model relates to a large-scale hot air circulating roaster with an externally located combustion chamber; it includes a feeder connected to a top hopper of the roaster, the bottom of which is connected to a discharge pipe, the bottom outlet of which is connected to the roaster drum for feeding, the bottom of which is connected to the hot air outlet of the combustion chamber pipe, the other end of which is connected to the combustion chamber, a burner is installed outside one end of the combustion chamber, the hot air generated by the burner is transferred to the inside of the combustion chamber through a fire shield inside the combustion chamber, one side of which is connected to one end of the hot air pipe, the hot air pipe passes through the air inlet at the top of the hot air dust collector, the air outlet of which is connected to the rear half of the hot air pipe, and the end of the rear half of the hot air pipe is connected to the top of the afterburner; it has the advantages of reasonable structural design, recycling of heat energy, improved thermal efficiency, treated exhaust gas before emission, no environmental pollution, and better roasted coffee bean taste.

Description

Technical Field

[0001] This utility model relates to the field of coffee machinery and equipment technology, specifically a large hot air circulating roaster with the combustion chamber moved outside. Background Technology

[0002] Hot air circulating roasters are highly efficient cooking equipment widely used in the food processing industry, especially in applications requiring uniform heating and rapid drying. Traditional roasters, however, cannot recycle hot air energy, resulting in high energy consumption. Exhaust gases are emitted directly without treatment, polluting the environment and affecting the taste and aroma of coffee beans. Furthermore, untimely cleaning of the hot air dust collector frequently leads to fires, posing significant safety hazards. Utility Model Content

[0003] The purpose of this invention is to provide a large-scale hot air circulation baking machine with an externally located combustion chamber to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a large-scale hot air circulating baking machine with an externally located combustion chamber, comprising a feeder connected to a top hopper of the baking machine, the bottom of the feeder being connected to a discharge pipe, the bottom outlet of the discharge pipe being connected to the baking machine drum for feeding, the bottom of the baking machine drum being connected to the hot air outlet of the combustion chamber pipe, the other end of the combustion chamber pipe being connected to the combustion chamber, a burner being installed outside one end of the combustion chamber, the hot air generated by the burner being transferred to the interior of the combustion chamber through a protective fire chamber inside the combustion chamber, and one side of the discharge pipe being connected to one end of the hot air pipe. The air duct passes through the air inlet at the top of the hot air dust collector. The air outlet of the hot air dust collector is connected to the rear half of the hot air duct. The end of the rear half of the hot air duct is connected to the top of the afterburner. The front outlet of the combustion chamber is connected to the inlet of the cooling plate. The outlet of the cooling plate is connected to the inlet at the top of the destoner through a pipe. The silver skin outlet at the top of the destoner is connected to the first cooling fan and the cooling dust collector in sequence through pipes. A water pump is provided on one side of the baking machine. The water pump is connected to the inside of the combustion chamber, the top of the cooling plate, and the inside of the hot air dust collector through water pipes. A control cabinet for controlling the operation of the entire machine is provided on one side of the baking machine.

[0005] Preferably, a first hot air control valve is provided at one end of the hot air duct near the material discharge duct, and a second hot air control valve is provided between the top of the combustion chamber and the hot air duct.

[0006] Preferably, the outer wall of the burner is provided with a heat-insulating outer cylinder, and the top of the burner is provided with an exhaust gas recovery pipe connected to the hot air pipe.

[0007] Preferably, a fresh air distribution valve is provided at one end of the exhaust gas recovery pipe near the burner, a first air distribution valve is provided at the position of the exhaust gas recovery pipe near the hot air pipe, and a second air distribution valve is provided at the position of the hot air pipe near the exhaust gas recovery pipe.

[0008] Preferably, the cooling plate includes a body with an upper cone attached to it. The top of the upper cone has a feed inlet. An inspection plate and a detection sensor are provided on the outside of the feed cover of the feed inlet. A second cooling fan is provided on one side of the body, and a stirring motor is provided on the other side. The bottom output shaft of the stirring motor is connected to a first sprocket. A stirring shaft is provided in the middle of the body. The bottom of the stirring shaft is connected to a second sprocket. A chain is provided between the first sprocket and the second sprocket for transmission. A stirring rod is provided at the top of the stirring shaft, and a paddle is connected to the stirring rod. A temperature probe is provided on the outer wall of the body.

[0009] Preferably, the stirring motor is equipped with a manual emergency shaft on top.

[0010] Preferably, the hot air dust collector includes a hot air fan at its top, a water spray nozzle connected to a water pump pipe at the upper part of the hot air dust collector, a temperature sensor and a rotary level switch at the lower part of the hot air dust collector, and an airlock at the bottom of the hot air dust collector.

[0011] Preferably, the water pump is connected to an external water tank, the upper part of the water tank is provided with a water inlet, the water inlet is connected to a float valve located inside the water tank, the bottom of the water tank is provided with a drain outlet, and the water pump is provided with a manual ball valve, an electric ball valve and a flow meter on the pipes of the combustion chamber, the upper part of the cooling plate and the hot air dust collector respectively.

[0012] This invention moves the combustion chamber to the outside of the roaster drum and increases its length, allowing more time for the recovered exhaust gas to burn off, eliminating smoke and odors and preventing them from affecting the aroma of the coffee beans. The stirring motor of the cooling tray is externally mounted, preventing damage to the motor due to high temperatures inside the cooling tray. The stirring motor is equipped with a manual emergency shaft, which allows the material inside the cooling tray to be removed in case of power failure or motor malfunction, preventing material from being stuck. Water spray nozzles are added inside the combustion chamber, above the cooling tray, and inside the hot air dust collector to spray water to cool the temperature when it is too high, preventing fire accidents and increasing workshop safety.

[0013] This invention has the advantages of reasonable structural design, recycling of thermal energy, improved thermal efficiency, treatment of exhaust gas before emission, no environmental pollution, and better taste of roasted coffee beans. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the structure of the burner of this utility model.

[0016] Figure 3 This is a schematic diagram of the connection structure of the hot air duct of this utility model.

[0017] Figure 4 This is a cross-sectional view of the cooling plate of this utility model.

[0018] Figure 5 This is a schematic diagram of the cooling plate of this utility model.

[0019] Figure 6 This is a schematic diagram of the structure of the water pump of this utility model.

[0020] Figure 7 This is a schematic diagram of the structure of the baking machine drum of this utility model. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Please see Figure 1 As shown in Figure 7, one embodiment of this utility model is provided: a large-scale hot air circulating baking machine with an externally moved combustion chamber, including a feeding machine 2 connected to a feeding hopper 1 at the top of the baking machine. The bottom of the feeding hopper 1 is connected to a discharging pipe 3, and the bottom outlet of the discharging pipe 3 is connected to a baking machine drum 4 for feeding. The bottom of the baking machine drum 4 is connected to the hot air outlet of a combustion chamber pipe 5, and the other end of the combustion chamber pipe 5 is connected to a combustion chamber 6. A burner 7 is provided outside one end of the combustion chamber 6. The hot air generated by the combustion of the burner 7 is transferred to the interior of the combustion chamber through a fire shield 8 inside the combustion chamber 6. One side of the discharging pipe 3 is connected to one end of a hot air pipe 9, and the hot air pipe 9 passes through a hot air dust collector. The air inlet at the top of the hot air dust collector 10 is connected to the rear half of the hot air duct 9. The end of the rear half of the hot air duct 9 is connected to the top of the afterburner 11. The front outlet of the combustion chamber 6 is connected to the inlet of the cooling plate 12. The outlet of the cooling plate 12 is connected to the inlet at the top of the destoner 13 through a pipe. The silver skin outlet 14 at the top of the destoner 13 is connected to the first cooling fan 15 and the cooling dust collector 16 through pipes in sequence. A water pump 17 is provided on one side of the baking machine. The water pump 17 is connected to the interior of the combustion chamber 6, the upper part of the cooling plate 12 and the interior of the hot air dust collector 10 through water pipes. A control cabinet 18 for controlling the operation of the entire machine is provided on one side of the baking machine.

[0023] Furthermore, a first hot air control valve 19 is provided at one end of the hot air duct 9 near the material discharge duct 3, and a second hot air control valve 20 is provided between the top of the combustion chamber 6 and the hot air duct 9. The first hot air control valve 19 is normally open, and the second hot air control valve 20 is normally closed. The first function is: when the material discharge duct 3 starts to discharge, the first hot air control valve 19 is closed and the second hot air control valve 20 is opened to prevent the material from entering the hot air duct 9. When the material is discharged, the first hot air control valve 19 is opened and the second hot air control valve 20 is closed. The second function is: when the machine is cooled and shut down after baking, the second hot air control valve 20 is opened and the first hot air control valve 19 is closed, which can quickly remove the heat from the baking machine drum 4.

[0024] Furthermore, the outer wall of the burner 7 is provided with a heat-insulating outer cylinder 21, and the top of the burner 7 is provided with a tail gas recovery pipe 22 connected to the hot air pipe 9.

[0025] Furthermore, a fresh air distribution valve 23 is provided at one end of the exhaust gas recovery pipe 22 near the burner 7, a first air distribution valve 24 is provided at the position of the exhaust gas recovery pipe 22 near the hot air pipe 9, and a second air distribution valve 25 is provided at the position of the hot air pipe 9 near the exhaust gas recovery pipe 22. The hot air exhaust gas is controlled by the central control system, which adjusts the opening size of the first air distribution valve 24, the second air distribution valve 25, and the fresh air distribution valve 23 to control the air intake of each pipe. In the later stage of baking, when the flue gas is large, the opening of the first air distribution valve 24 is larger, the opening of the second air distribution valve 25 is smaller, and the opening of the fresh air distribution valve 23 is larger. In the earlier stage of baking, when the flue gas is small, the opening of the first air distribution valve 24 is smaller, the opening of the second air distribution valve 25 is larger, and the opening of the fresh air distribution valve 23 is smaller. The fresh air distribution valve 23 is mainly for distributing fresh air to ensure the extra oxygen required for combustion and to ensure the flavor of the baking.

[0026] Furthermore, the cooling tray 12 includes a body 26, on which an upper cone 27 is spliced. The top of the upper cone 27 has a feed inlet 28. An inspection plate 30 and a detection sensor 31 are located on the outer side of the feed cover 29 of the feed inlet 28. A second cooling fan 32 is located on one side of the body 26, and a stirring motor 33 is located on the other side. The bottom output shaft of the stirring motor 33 is connected to a first sprocket 34. A stirring shaft 35 is located in the middle of the interior of the body 26. The bottom of the stirring shaft 35 is connected to a second sprocket 36. A chain 37 is provided between the first sprocket 34 and the second sprocket 36 for transmission. A stirring rod 38 is located at the top of the stirring shaft 35, and a lever 39 is connected to the stirring rod 38. A temperature probe 40 is located on the outer wall of the body 26. The addition of the temperature probe 40 is necessary because previous machines relied on... The timing control and touch sensing methods are not precise enough for accurate temperature measurement. By adding a temperature probe 40, the influence of additional factors is reduced. When the set temperature of the temperature probe 40 is reached, the cooling fan 32 is turned off, the cooling and destoning switching valve switches, the cooling fan turns back on, and the destoner 13 starts working, sucking the material into the destoner chamber. Based on the different specific gravities of coffee beans and stones, impurities in the coffee beans are separated, avoiding damage to the downstream grinding system. A detection sensor 31 is added. When the feed cover 29 is opened, the detection sensor 31 detects it and stops the stirring to prevent the stirring rod from causing injury to the hands. The stirring motor 33 is externally mounted so that it will not be damaged by the high temperature inside the cooling tray. The cooling tray 12 is relatively large, measuring 2.8 meters, which is wider than a normal shipping container. The cooling tray needs to be made into a splicing structure for easy handling.

[0027] Furthermore, the stirring motor 33 is equipped with a manual emergency shaft 41 at its top; in the event of no power or motor failure, the manual emergency shaft 41 can push the material inside the cooling plate out, preventing the material from being unable to come out after a failure.

[0028] Furthermore, the hot air dust collector 10 includes a hot air blower 42 at its top, a water spray nozzle 43 connected to the water pipe of the water pump 17 at the upper part of the hot air dust collector 10, a temperature sensor 44 and a rotary paddle level switch 45 at the lower part of the hot air dust collector 10, and an airlock 46 at the bottom of the hot air dust collector 10. When roasting coffee, the hot air is oily, and the separated silver foil easily sticks to the wall of the hot air dust collector 10, causing poor material feeding and easy material accumulation. At the conical inlet, the silver foil is a flammable material, and the hot air will carry away the flammable material. A spark ignited the material, causing a fire and damaging the equipment. To address this, a temperature sensor 44 was added. When the temperature reaches a certain value, water is sprayed from the nozzle 43 to cool the material until it reaches a safe temperature. A rotary level switch 45 was also added. When the silver material reaches the level switch position, the rotary switch is damped and stops rotating, triggering an alarm that requires manual intervention. An airlock 46 was also added to ensure the hot air dust collector 10 is sealed and to continuously drop the silver material into the integrated bucket, isolating it from the hot air dust collector 10 to prevent fire.

[0029] Furthermore, the water pump 17 is connected to the external water tank 47. The upper part of the water tank 47 is provided with a water inlet 48, which is connected to a float valve 49 located inside the water tank 47. The bottom of the water tank 47 is provided with a drain outlet 50. The water pump 17 is connected to the inside of the combustion chamber 6, the upper part of the cooling plate 12, and the pipes of the hot air dust collector 10, respectively, with a manual ball valve 51, an electric ball valve 52, and a flow meter 53.

[0030] Working principle: The burner 7 is ignited and begins to heat up, raising the machine temperature to the material feeding temperature. During this process, material can be fed into the feeder 2. The high-pressure blower is started, creating negative pressure in the feeder hopper of the feeder 2, drawing the raw beans from the feeder 2 into the feed hopper 1. The discharge valve on the discharge pipe 3 is opened, and the material enters the roasting drum 4 to begin roasting. After roasting, the discharge door is opened, and the second cooling blower 32 is turned on, allowing the material to enter the cooling plate 12 for cooling. Once cooled to the discharge temperature, destoning begins. The first cooling blower 15 is started, drawing the material into the destoner 13's hopper. Based on the difference in specific gravity, the material is separated from stones, metals, etc. The final discharge is the roasted finished product.

[0031] This invention increases the length of the combustion chamber 6, giving the recovered exhaust gas more time to burn off the smoke and odors, preventing the odors from affecting the aroma of the coffee beans. The combustion chamber 6 is also moved outward, shortening the length of the main unit. The main unit can be divided into upper and lower parts, which can be transported and hoisted separately, so that it will not be too high to be transported.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. Any reference numerals in the claims should be regarded as limiting the scope of the claims.

Claims

1. A large-scale hot air circulating baking machine with an external combustion chamber, comprising a feeder (2) connected to a top feed hopper (1) of the baking machine, the bottom of the feed hopper (1) being connected to a discharge pipe (3), and the bottom outlet of the discharge pipe (3) being connected to a baking machine drum (4) for feeding, characterized in that: The bottom of the baking machine drum (4) is connected to the hot air outlet of the combustion chamber pipe (5), and the other end of the combustion chamber pipe (5) is connected to the combustion chamber (6). A burner (7) is provided outside one end of the combustion chamber (6). The hot air generated by the burner (7) is transferred to the inside of the combustion chamber through the fire shield (8) inside the combustion chamber (6). One side of the feeding pipe (3) is connected to one end of the hot air pipe (9). The hot air pipe (9) passes through the air inlet at the top of the hot air dust collector (10). The air outlet of the hot air dust collector (10) is connected to the rear half of the hot air pipe (9). The end of the rear half of the hot air pipe (9) is connected to the afterburner. (11) is connected to the top. The front outlet of the combustion chamber (6) is connected to the inlet of the cooling plate (12). The outlet of the cooling plate (12) is connected to the inlet of the upper part of the destoner (13) through a pipe. The silver skin outlet (14) at the top of the destoner (13) is connected to the first cooling fan (15) and the cooling dust removal cylinder (16) in sequence through a pipe. A water pump (17) is provided on one side of the baking machine. The water pump (17) is connected to the interior of the combustion chamber (6), the upper part of the cooling plate (12) and the interior of the hot air dust removal cylinder (10) through water pipes. A control cabinet (18) for controlling the operation of the entire machine is provided on one side of the baking machine.

2. The large-scale hot air circulating baking machine with an externally moved combustion chamber according to claim 1, characterized in that: A first hot air control valve (19) is provided at one end of the hot air duct (9) near the material discharge duct (3), and a second hot air control valve (20) is provided between the top of the combustion chamber (6) and the hot air duct (9).

3. A large-scale hot air circulating baking machine with an externally moved combustion chamber according to claim 1, characterized in that: The burner (7) has an outer wall with a heat-insulating outer cylinder (21) and a tail gas recovery pipe (22) connected to the hot air pipe (9) at the top.

4. A large-scale hot air circulating baking machine with an externally moved combustion chamber according to claim 3, characterized in that: A fresh air distribution valve (23) is provided at one end of the exhaust gas recovery pipe (22) near the burner (7), a first air distribution valve (24) is provided at the position of the exhaust gas recovery pipe (22) near the hot air pipe (9), and a second air distribution valve (25) is provided at the position of the hot air pipe (9) near the exhaust gas recovery pipe (22).

5. A large-scale hot air circulating baking machine with an externally moved combustion chamber according to claim 1, characterized in that: The cooling plate (12) includes a body (26), on which is a spliced ​​upper cone (27). The top of the upper cone (27) is provided with a feed inlet (28). The feed cover (29) of the feed inlet (28) is provided with an inspection plate (30) and a detection sensor (31) on the outside. A second cooling fan (32) is provided on one side of the body (26), and a stirring motor (33) is provided on the other side. The bottom output shaft of the stirring motor (33) is connected to the first sprocket (34). A stirring shaft (35) is provided in the middle of the interior of the body (26). The bottom of the stirring shaft (35) is connected to the second sprocket (36). A chain (37) is provided between the first sprocket (34) and the second sprocket (36) for transmission. A stirring rod (38) is provided at the top of the stirring shaft (35). A paddle (39) is connected to the stirring rod (38). A temperature probe (40) is provided on the outer wall of the body (26).

6. A large-scale hot air circulating baking machine with an externally located combustion chamber according to claim 5, characterized in that: The stirring motor (33) is equipped with a manual emergency shaft (41) on top.

7. A large-scale hot air circulating baking machine with an externally moved combustion chamber according to claim 1, characterized in that: The hot air dust collector (10) includes a hot air blower (42) at its top, a water spray nozzle (43) connected to the water pipe of the water pump (17) at the upper part of the hot air dust collector (10), a temperature sensor (44) and a rotary level switch (45) at the lower part of the hot air dust collector (10), and an airlock (46) at the bottom of the hot air dust collector (10).

8. A large-scale hot air circulating baking machine with an externally located combustion chamber according to claim 1, characterized in that: The water pump (17) is connected to the water tank (47) outside it. The upper part of the water tank (47) is provided with a water inlet (48). The water inlet (48) is connected to a float valve (49) located inside the water tank (47). The bottom of the water tank (47) is provided with a drain outlet (50). The water pump (17) is provided with a manual ball valve (51), an electric ball valve (52), and a flow meter (53) on the pipes of the combustion chamber (6), the upper part of the cooling plate (12), and the hot air dust collector (10).

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