Double-temperature-zone oil-tea camellia seed drying system

Abstract

The utility model discloses a kind of double-temperature-zone camellia seed drying systems, it is related to camellia seed drying technical field, including heating device, first drying device, second drying device, further including heating pipe assembly, heating pipe assembly is located between the air outlet of heating device and the air inlet of first drying device, second drying device, air return pipe assembly is located between the air inlet of heating device and the air outlet of first drying device, second drying device, two temperature-adjusting structures are respectively located between heating pipe assembly and the air inlet of first drying device, second drying device;This kind of double-temperature-zone camellia seed drying system, two drying devices can be realized single heating device to double-temperature-zone heating, realize the overall utilization of heat, and can avoid the problem of rising of later artificial and maintenance cost brought by double heating device.

Description

Technical Field

[0001] This utility model relates to the field of camellia seed drying technology, specifically a dual-temperature zone camellia seed drying system. Background Technology

[0002] Camellia seeds are the core raw material of the camellia oil industry, and their moisture content directly affects the efficiency of subsequent processing steps such as pressing and refining, as well as the quality of the finished oil. During camellia seed processing, two drying processes are required to achieve the ideal processing state. The first drying is carried out at a medium temperature of around 60℃ to cause the camellia fruit to burst open, separating the outer shell from the seed. The second drying requires a lower temperature of around 50℃ to slowly bake away the bound moisture inside the kernel, while preventing over-drying that could cause the camellia seeds to crack and lose nutrients.

[0003] Currently, the industry generally adopts a matching mode of two independently heated drying ovens plus two drying units. That is, the first drying oven provides 60℃ hot air to the first drying unit, and the second drying oven provides 50℃ hot air to the second drying unit, so as to achieve independent drying in a single temperature zone.

[0004] However, the two drying ovens need to maintain hot air supplies at different temperatures, making it impossible to achieve coordinated utilization of heat. Especially under low-capacity conditions, the heat load rate of a single drying oven is insufficient, resulting in a large amount of energy loss. At the same time, the two pieces of equipment need to be operated and maintained separately, which will increase the labor and maintenance costs in the later stages. Utility Model Content

[0005] The purpose of this invention is to provide a dual-temperature zone camellia seed drying system. This dual-temperature zone camellia seed drying system can realize dual-temperature zone heating of two drying devices by a single heating device, realize the overall utilization of heat, and avoid the problem of increased labor and maintenance costs caused by dual heating devices.

[0006] The above-mentioned optimized structure of this utility model is achieved through the following technical solution: a dual-temperature zone camellia seed drying system, including a heating device, a first drying device, a second drying device, and a heating pipe assembly, wherein the heating pipe assembly is disposed between the air outlet of the heating device and the air inlet of the first drying device and the second drying device. A return air pipe assembly is provided between the air inlet of the heating device and the air outlets of the first drying device and the second drying device. Two temperature control structures are respectively located between the heating pipe assembly and the air inlet of the first drying device and the second drying device.

[0007] In some embodiments, the heating pipe assembly includes a main heating pipe connected to the air outlet of the heating device; The first heating branch pipe is located between the main heating pipe and the air inlet of the first drying device. The second heating branch pipe is located between the main heating pipe and the air inlet of the second drying device.

[0008] In some embodiments, the temperature control structure includes an air pump, the outlet of which is connected to the first heating branch pipe or the second heating branch pipe. The first temperature measuring instrument is located between the first heating pipe and the air inlet of the first drying device, or between the second heating pipe and the air inlet of the second drying device.

[0009] In some embodiments, the temperature control structure further includes a second temperature measuring instrument, which is disposed between the air outlet of the air pump and the first heating branch pipe or the second heating branch pipe. A flow control valve is provided between the second thermometer and the outlet of the air pump.

[0010] In some embodiments, the temperature control structure further includes a flow meter, which is disposed between the heating main pipe and the first heating branch pipe or the second heating branch pipe.

[0011] In some embodiments, the temperature control structure further includes a filter screen disposed at the air inlet of the air pump.

[0012] In some embodiments, the system further includes a venturi tube, the two ends of which are connected to the main heating pipe, the first heating branch pipe, or the second heating branch pipe, respectively, and the throat of the venturi tube is connected to the outlet of the air pump.

[0013] In some embodiments, the return gas pipe assembly includes a return gas main pipe connected to the air inlet of the heating device; Two return air branch pipes are respectively located between the main return air pipe and the air inlet of the first drying device, and between the main return air pipe and the air inlet of the second drying device.

[0014] In summary, this utility model has the following beneficial effects: This invention, by setting up a heating pipe assembly, a return gas pipe assembly, and two temperature control structures, enables independent temperature regulation of the first and second drying devices, meeting the different temperature requirements of camellia seeds at different drying stages, improving drying efficiency and camellia seed quality; at the same time, the return gas pipe assembly realizes the recycling of gas, saving energy. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] In the diagram: 1. Heating device; 2. First drying device; 3. Second drying device; 4. Heating pipe assembly; 41. Main heating pipe; 42. First heating branch pipe; 43. Second heating branch pipe; 5. Return gas pipe assembly; 51. Main return gas pipe; 52. Return gas branch pipe; 6. Temperature control structure; 61. Air pump; 62. First thermometer; 63. Second thermometer; 64. Flow control valve; 65. Flow meter; 7. Venturi tube. Detailed Implementation

[0017] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] refer to Figure 1 A dual-temperature zone camellia seed drying system includes a heating device 1, a first drying device 2, a second drying device 3, a heating pipe assembly 4, a return air pipe assembly 5, and two temperature regulating structures 6. The heating device 1 can be an electric heater, providing a heat source for the entire system. The first drying device 2 performs initial medium-temperature drying (around 60°C) on the camellia seeds, and the second drying device 3 performs secondary low-temperature drying (around 50°C). The heating pipe assembly 4 is located between the air outlet of the heating device 1 and the air inlets of the first and second drying devices 2 and 3, respectively, and can directionally transport the hot air output from the heating device 1 to the first drying device 2. The second drying device 3 and the return air pipe assembly 5 are located between the air inlet of the heating device 1 and the air outlets of the first drying device 2 and the second drying device 3. They can return the hot and humid airflow discharged from the first drying device 2 and the second drying device 3 to the heating device 1 for reheating, so as to realize the recycling of hot airflow and reduce energy consumption. Two temperature adjustment structures 6 are respectively located between the heating pipe assembly 4 and the air inlet of the first drying device 2 and the second drying device 3. They can adjust the temperature of the hot air entering the first drying device 2 and the second drying device 3 respectively, realize precise temperature control in dual temperature zones, and meet the different temperature requirements of the first drying device 2 and the second drying device 3.

[0019] In some embodiments, the heating pipe assembly 4 includes a main heating pipe 41, a first heating branch pipe 42, and a second heating branch pipe 43. One end of the main heating pipe 41 is sealed to the air outlet of the heating device 1, which can collect the hot air output by the heating device 1. The two ends of the first heating branch pipe 42 are sealed to the main heating pipe 41 and the air inlet of the first drying device 2, respectively, which can supply hot air to the first drying device 2. The two ends of the second heating branch pipe 43 are sealed to the main heating pipe 41 and the air inlet of the second drying device 3, respectively, which can supply hot air to the second drying device 3. The branch pipe design avoids mutual interference between the airflows flowing to the first drying device 2 and the second drying device 3, ensuring the stability of their respective drying temperatures.

[0020] In some embodiments, the temperature control structure 6 includes an air pump 61 and a first thermometer 62. The air pump 61 is a temperature control power source, and its outlet is connected to the first heating branch pipe 42 or the second heating branch pipe 43 through a pipe. It can pump ambient air into the branch pipe and mix it with the hot air delivered by the main heating pipe 41 to reduce the temperature. The first thermometer 62 is installed between the first heating branch pipe 42 and the air inlet of the first drying device 2, or between the second heating branch pipe 43 and the air inlet of the second drying device 3. It can detect the temperature of the mixed air before entering the first drying device 2 or the second drying device 3 in real time, provide data for temperature regulation, and ensure that the air temperature entering the first drying device 2 or the second drying device 3 meets the target requirements. The first thermometer 62 can be a thermocouple sensor.

[0021] In some embodiments, the temperature control structure 6 further includes a second thermometer 63 and a flow control valve 64. The second thermometer 63 is installed on the connecting pipe between the outlet of the air pump 61 and the first heating branch pipe 42 (or the second heating branch pipe 43) to detect the ambient temperature air output by the air pump 61, avoiding the impact of ambient temperature changes on the accuracy of the mixing temperature calculation. The second thermometer 63 can be a thermocouple sensor. The flow control valve 64 is connected in series between the second thermometer 63 and the outlet of the air pump 61 and can be an electromagnetic control valve. It can precisely adjust the flow rate of the ambient temperature air output by the air pump 61 based on the detection data of the first thermometer 62 and the second thermometer 63. If the mixing temperature is higher than the target value, the opening of the flow control valve 64 is increased to increase the amount of ambient temperature air mixed in; if the mixing temperature is lower than the target value, the opening is decreased to reduce the amount of mixed air, thereby achieving fine temperature control.

[0022] In some embodiments, the flow meter 65 is installed at the connection between the heating main pipe 41 and the first heating branch pipe 42 or the second heating branch pipe 43. It can detect the flow rate of hot air flowing into the first heating branch pipe 42 or the second heating branch pipe 43 in real time, so as to adjust the opening of the flow control valve 64 to provide an appropriate amount of external gas and ensure that the temperature of the mixed gas meets the set value.

[0023] In some embodiments, the temperature control structure 6 also includes a filter screen, which is fixedly installed at the air inlet of the air pump 61. The filter screen can be made of 80-100 mesh metal filter screen and can be fixed by welding. It can filter out dust, lint and other impurities in the air. This prevents impurities from entering the drying device with the airflow, adhering to the surface of the camellia seeds and affecting their quality, clogging pipes or ventilation holes of the drying device, and reducing the frequency of equipment maintenance.

[0024] In some embodiments, a Venturi tube 7 is also included. One end of the Venturi tube 7 is sealed to a branch end of the heating main pipe 41, and the other end is sealed to a first heating branch pipe 42 or a second heating branch pipe 43. The throat of the Venturi tube 7 is connected to the outlet of the air pump 61 through a branch pipe. When the hot air from the heating main pipe 41 flows through the throat of the Venturi tube 7, the flow velocity increases and the pressure decreases, which will have a suction effect on the room temperature air output by the air pump 61, causing the two airflows to mix violently at the throat. This avoids the phenomenon of local high temperature or local low temperature, further improves the uniformity of the air temperature entering the drying device, improves the accuracy of the measurement results of the first thermometer 62, and ensures consistent drying effect of the camellia seeds.

[0025] In some embodiments, the return gas pipe assembly 5 includes a main return gas pipe 51 and two branch return gas pipes 52. One end of the main return gas pipe 51 is sealed to the air inlet of the heating device 1, which can collect the return gas discharged from each drying device. One end of each of the two branch return gas pipes 52 is sealed to the air outlet of the first drying device 2 and the air outlet of the second drying device 3, respectively, and the other end merges into the main return gas pipe 51. Although the airflow discharged from the drying device contains a certain amount of moisture, it still retains a lot of heat. By sending it back to the heating device 1 for reheating through the return gas pipe assembly 5, the fuel consumption of the heating device 1 can be reduced.

[0026] In some embodiments, a control system is also included, which is electrically connected to the air pump 61, the first thermometer 62, the second thermometer 63, the flow control valve 64, and the flow meter 65 to realize automated control of the drying system and improve the reaction speed.

[0027] The specific working principle is as follows: First, heating device 1 generates hot air, which is then transported through the main heating pipe 41. For the first drying device 2 and the second drying device 3, temperature regulation is achieved through corresponding temperature control structures 6: an air pump 61 pumps in outside air or treated air, filters impurities through a filter screen, and controls the flow rate through a flow control valve 64. A second thermometer 63 detects the temperature of the air output from the air pump 61, and a flow meter 65 detects the flow rate of the hot air transported from the main heating pipe 41. Then, at the venturi tube 7, the air pumped in by the air pump 61 mixes thoroughly with the hot air from the main heating pipe 41 at the throat of the venturi tube 7. The temperature of the mixed air can be detected by the first thermometer 62. If the temperature does not meet the requirements, the opening of the flow control valve 64 can be adjusted to change the flow rate of the air pumped in by the air pump 61, thereby adjusting the temperature of the mixed air so that the air entering the first drying device 2 or the second drying device 3 reaches the required drying temperature. During the drying process, after the first drying device 2 and the second drying device 3 dry the camellia seeds, the discharged gas is returned to the main gas return pipe 51 through the return gas branch pipe 52, and then transported to the air inlet of the heating device 1 by the main gas return pipe 51. The heating device 1 reheats the returned gas to achieve gas recycling and save energy.

[0028] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A dual-temperature zone camellia seed drying system, comprising a heating device (1), a first drying device (2), and a second drying device (3), characterized in that: It also includes a heating pipe assembly (4), which is located between the air outlet of the heating device (1) and the air inlets of the first drying device (2) and the second drying device (3). The return air pipe assembly (5) is located between the air inlet of the heating device (1) and the air outlets of the first drying device (2) and the second drying device (3). Two temperature control structures (6) are respectively located between the heating pipe assembly (4) and the air inlets of the first drying device (2) and the second drying device (3).

2. The dual-temperature zone camellia seed drying system according to claim 1, characterized in that: The heating pipe assembly (4) includes a main heating pipe (41), which is connected to the outlet of the heating device (1). The first heating branch pipe (42) is located between the heating main pipe (41) and the air inlet of the first drying device (2); The second heating branch pipe (43) is located between the heating main pipe (41) and the air inlet of the second drying device (3).

3. The dual-temperature zone camellia seed drying system according to claim 2, characterized in that: The temperature control structure (6) includes an air pump (61), the outlet of which is connected to the first heating branch pipe (42) or the second heating branch pipe (43). The first thermometer (62) is located between the first heating pipe (42) and the air inlet of the first drying device (2) or between the second heating pipe (43) and the air inlet of the second drying device (3).

4. The dual-temperature zone camellia seed drying system according to claim 3, characterized in that: The temperature control structure (6) also includes a second thermometer (63), which is located between the outlet of the air pump (61) and the first heating branch pipe (42) or the second heating branch pipe (43). A flow control valve (64) is provided between the second thermometer (63) and the outlet of the air pump (61).

5. The dual-temperature zone camellia seed drying system according to claim 3, characterized in that: The temperature control structure (6) also includes a flow meter (65), which is located between the main heating pipe (41) and the first heating branch pipe (42) or the second heating branch pipe (43).

6. The dual-temperature zone camellia seed drying system according to claim 3, characterized in that: The temperature control structure (6) also includes a filter screen, which is located at the air inlet of the air pump (61).

7. The dual-temperature zone camellia seed drying system according to claim 3, characterized in that: It also includes a venturi tube (7), the two ends of which are connected to the main heating pipe (41), the first heating branch pipe (42) or the second heating branch pipe (43) respectively, and the throat of the venturi tube (7) is connected to the outlet of the air pump (61).

8. The dual-temperature zone camellia seed drying system according to claim 1, characterized in that: The return gas pipe assembly (5) includes a return gas main pipe (51), which is connected to the air inlet of the heating device (1). Two return gas branch pipes (52) are respectively located between the return gas main pipe (51) and the air inlet of the first drying device (2), and between the return gas main pipe (51) and the air inlet of the second drying device (3).

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