Biomass drying device and method

Abstract

The invention discloses a biomass drying device and method, and relates to the technical field of biomass drying. The conveying belt is arranged in the drying bin; a plurality of air chambers are uniformly arranged between a bearing layer and a return stroke layer of the conveying belt in the conveying direction; hot air in the air chambers is used for drying biomass materials conveyed on the bearing layer of the conveying belt after passing through an air distribution plate; a feeding opening scale baffle capable of moving up and down is arranged at a feeding opening of the drying bin and used for adjusting and controlling the thickness of materials. A feeding gear and a discharging gear are arranged at a feeding port and a discharging port of the drying bin correspondingly. A plurality of thermocouples and moisture meters are evenly arranged in the drying bin in the conveying direction and used for monitoring the hot air temperature and the water content of materials in real time. The drying bin is provided with a flue gas collecting port used for collecting gas generated in the drying process in real time and analyzing the gas on line. According to the invention, stable loading and unloading of light biomass materials and uniform distribution of hot air are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of biomass drying, and in particular to a biomass drying device and method. Background Art

[0002] Biomass refers to a class of materials made from naturally renewable biomass resources (such as plants, animals, microorganisms, and their metabolites) through physical, chemical, or biological processing. These materials are renewable, biodegradable, and environmentally friendly, making them an important alternative to traditional fossil-based materials such as plastics and rubber.

[0003] Biomass raw materials come from a wide range of sources, mainly including the following categories:

[0004] Plant resources: Wood, straw (such as corn straw and wheat straw), rice husks, and sugarcane bagasse are rich in cellulose, hemicellulose, and lignin, and are the main raw materials for preparing bio-based plastics, fibers, and adhesives. Starch from crops such as corn, potatoes, and sweet potatoes can be used to produce biodegradable plastics (such as one of the raw materials for polylactic acid (PL)) and food packaging materials. Vegetable oils such as soybean oil, palm oil, and castor oil can be used to make bio-based polyurethanes, lubricants, and surfactants. Cotton, hemp, and bamboo can be used directly for textiles or processed into cellulose fibers (such as bamboo fiber and lyocell fiber).

[0005] Animal resources: Silk, wool, and collagen (such as leather processing byproducts) can be used in textiles and biomedical materials (such as surgical sutures); derived from the shells of crustaceans such as shrimp and crab shells, they can be used to make biodegradable plastics, medical dressings, and environmentally friendly coatings;

[0006] Microbial resources: Polymer materials synthesized by bacteria, fungi, and other microorganisms through fermentation, such as polyhydroxyalkanoates (PHAs), are fully biodegradable and used in packaging and medical applications. Cellulose secreted by microorganisms such as Acetobacter xylinum is highly pure and strong, and can be used as a food additive and biomedical material.

[0007] Biowaste: Agricultural waste (such as fruit peels and rice husks), forestry waste (such as sawdust), food processing by-products (such as bean dregs and coffee grounds), etc. can be recycled into environmentally friendly boards, packaging materials or biofuels.

[0008] Biomass itself has a loose texture, large gaps in the fiber structure, and low bulk density (weight per unit volume). For example, straw requires manual assistance for loading and unloading under normal pressure, making it difficult to load and unload stably and automatically.

[0009] Currently, most drying devices on the market only involve grain, and most of them adopt the top-inlet drying method, which results in uneven hot air distribution, low drying efficiency, and a lack of drying devices suitable for different types of biomass. Summary of the Invention

[0010] In order to overcome the above-mentioned defects in the prior art, the present invention provides a biomass drying device and method, which ensures stable loading and unloading of light biomass materials and uniform distribution of hot air.

[0011] To achieve the above object, the present invention adopts the following technical solutions, including:

[0012] A biomass drying device comprises: a drying chamber for drying biomass materials, a conveyor belt arranged in the drying chamber for conveying the biomass materials, and an air chamber arranged in the drying chamber for providing hot air to dry the biomass materials on the conveyor belt;

[0013] Several air chambers are evenly arranged along the conveying direction between the carrying layer and the return layer of the conveyor belt. Air distribution plates are provided in the air chambers. The hot air input into the air chambers passes through the air distribution plates to dry the biomass materials conveyed on the carrying layer of the conveyor belt. At the same time, the air distribution plates automatically adjust the opening and closing degree according to the pressure difference changes in the air chambers to ensure uniform distribution of hot air.

[0014] Preferably, a loading port scale baffle that can move up and down is provided at the loading port of the drying bin to adjust the thickness of the material.

[0015] Preferably, a loading gear is provided at the loading port of the drying bin, and the biomass material enters from the loading port of the drying bin and falls onto the conveyor belt through the loading gear; a discharge gear and an ash baffle are provided at the discharge port of the drying bin, and the biomass material after being conveyed by the conveyor belt falls from the discharge port of the drying bin under the joint action of the discharge gear and the ash baffle.

[0016] Preferably, each air chamber is connected to the hot air dry pipe through the corresponding hot air branch pipe, and the hot air is transported to each hot air branch pipe through the hot air dry pipe. Each hot air branch pipe transports the hot air to the corresponding air chamber. The air distribution plate is arranged above the hot air branch pipe and is connected to the air chamber through a gravity hinge. A first flow meter with a regulating valve is provided on the hot air dry pipe, and a second flow meter with a regulating valve is provided on each hot air branch pipe.

[0017] Preferably, a number of thermocouples and moisture meters are evenly arranged on the top of the drying bin along the conveying direction for real-time monitoring of the hot air temperature and the moisture content of the material; an observation window is provided on the side wall of the drying bin for observing the drying condition of the biomass material in the drying bin; the drying bin is provided with a flue gas collection port for real-time collection of the gas generated during the drying process, and a flue gas analyzer is used for online monitoring and analysis to analyze the gas pollutant data; the drying bin is also provided with an exhaust port for exhausting the hot air introduced into the drying bin.

[0018] The present invention also provides a biomass drying method, which is applicable to the above-mentioned biomass drying device. The specific process is as follows:

[0019] In step S1, the biomass material enters the drying chamber from the loading port and falls onto the carrying layer of the conveyor belt through the loading gear. During the process, the hot air passes through the hot air main pipe and the hot air branch pipe and enters the air chamber between the carrying layer and the return layer of the conveyor belt. The hot air in the air chamber passes through the air distribution plate to dry the biomass material conveyed on the carrying layer of the conveyor belt;

[0020] S2, during the drying process, that is, during the conveyor belt conveyor, the hot air temperature and material moisture content are monitored in real time by thermocouples and moisture meters. The gas generated during the drying process is collected in real time through the flue gas collection port and the gas pollutant data is monitored and analyzed online using a flue gas analyzer;

[0021] S3, after the material is dried, that is, after being conveyed by the conveyor belt, it falls from the discharge port of the drying bin under the joint action of the discharge gear and the ash baffle.

[0022] Preferably, the drying temperature, i.e., hot air temperature, hot air speed, and conveyor belt speed, are controlled in real time according to the moisture content of the material:

[0023] If the moisture content of the material is higher than the set threshold, the conveyor belt speed is slowed down and / or the hot air speed is increased and / or the drying temperature is raised; if the moisture content of the material is too low, the conveyor belt speed is accelerated and / or the hot air speed is reduced and / or the drying temperature is lowered.

[0024] Preferably, the gas pollutant data monitored and analyzed online by the flue gas analyzer is checked in real time. If the pollutant concentration is higher than a set threshold, the drying temperature is lowered to avoid the generation of gas pollutants.

[0025] The present invention also provides an electronic device, which includes a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor implements the biomass drying method when executing the computer program.

[0026] The present invention also provides a computer program product, which includes a computer program / instruction, and when the computer program / instruction is executed by a processor, the biomass drying method is implemented.

[0027] The advantages of the present invention are:

[0028] (1) The present invention evenly arranges a number of air chambers along the conveying direction between the bearing layer (upper layer) and the return layer (lower layer) of the conveyor belt, which can accelerate the circulation of hot air, avoid the dissipation of hot air, reduce energy loss, reduce local overheating or undried areas, and achieve uniform distribution of hot air. It can also individually adjust the hot air temperature and wind speed parameters of the air chamber according to the moisture content of the material in the bearing layer above the air chamber and the changes in the material layer, thereby optimizing the drying product.

[0029] (2) The present invention provides a biomass drying device, which carries out structural design of the drying device such as feeding gear, unloading gear, and air distribution plate, thereby ensuring stable loading and unloading of light biomass materials and uniform distribution of hot air under normal pressure environment.

[0030] (3) The feeding gear is installed on the conveying roller. When the material enters the feeding port of the drying bin, the feeding gear rotates clockwise as the conveying roller rotates. The material is brought onto the conveyor belt through the material-pickup plate on the feeding gear, ensuring the stable feeding of the light biomass and preventing the hot air from leaking out.

[0031] (4) The unloading gear is installed on the conveying roller. When the material moves from the carrying layer (upper layer) of the conveyor belt to the return layer (lower layer), the unloading gear rotates counterclockwise, and the material stripping plate on the unloading gear and the conveyor belt rotate in opposite directions to each other, so that the material can be discharged stably. At the same time, the dried material can be slightly crushed. If some material is still adhered to the conveyor belt, the dust baffle can scrape it away and drop it into the unloading port of the drying bin.

[0032] (5) The air distribution plate is set above the hot air branch pipe. The thrust generated by the pressure difference of the air flow above and below the air distribution plate is balanced with the gravity mechanism. When the pressure difference changes, the opening and closing degree is automatically adjusted to ensure uniform distribution of hot air.

[0033] (6) The present invention can dry different types of biomass materials by adjusting parameters such as raw material thickness, drying temperature, and hot air volume according to different biomass materials.

[0034] (7) While drying the biomass material, the present invention also performs online monitoring and analysis of gaseous pollutant data, thereby regulating the drying temperature and avoiding the generation of gaseous pollutants. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a plan layout diagram of a biomass drying device.

[0036] Figure 2 This is a middle plan layout diagram of a biomass drying device.

[0037] Figure 3 This is an AA cross-sectional view of a biomass drying device.

[0038] Figure 4 This is a BB cross-sectional view of a biomass drying device.

[0039] In the figure: 1. Loading port scale baffle; 2. Loading gear; 3. Unloading gear; 31. Dust baffle; 4. Hot air dry pipe; 41. First flow meter; 5. Hot air branch pipe; 51. Second flow meter; 52. Air distribution plate; 53. Pipe clamp; 6. Air chamber; 61. Air chamber support; 7. Conveyor belt; 8. Thermocouple and moisture meter; 9. Smoke collection port; 10. Exhaust port; 11. Observation window; 12. Bracket. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] Depend on Figure 1 As shown, a biomass drying device includes: a drying chamber for drying biomass materials, a conveyor belt 7 arranged in the drying chamber for conveying biomass materials, and an air chamber 6 arranged in the drying chamber for providing hot air to dry the biomass materials on the conveyor belt 7.

[0042] The biomass material enters the drying bin from the loading port and falls onto the conveyor belt 7 through the loading gear 2. The loading gear 2 is installed on the conveyor roller. When the material enters the loading port of the drying bin, the loading gear 2 rotates clockwise as the conveyor roller rotates. The material is brought to the conveyor belt 7 through the prying plate on the loading gear 2, ensuring the stable loading of the light biomass and preventing the hot air from leaking out.

[0043] Between the bearing layer (upper layer) and the return layer (lower layer) of the conveyor belt 7, there are several air chambers 6 evenly arranged along the conveying direction. The air chambers 6 are supported by air chamber support frames 61. Each air chamber 6 is connected to the hot air dry pipe 4 through the corresponding hot air branch pipe 5. The hot air is transported to each hot air branch pipe 5 through the hot air dry pipe 4. Each hot air branch pipe 5 transports the hot air to the corresponding air chamber 6. An air distribution plate 52 is provided in the air chamber 6. The air distribution plate 52 is arranged above the hot air branch pipe 5 and is connected to the hot air dry pipe 4 through a gravity hinge. In the air chamber 6, the thrust generated by the air pressure difference above and below the air distribution plate 52 and the balance relationship formed by the gravity mechanism (gravity hinge) are used. When the pressure difference changes, the opening and closing degree is automatically adjusted to ensure uniform distribution of hot air. For example, when the pressure difference increases and the thrust of the hot air flow is greater than the gravity of the material bed (bearing layer), the air distribution plate moves upward to increase the ventilation gap, and the hot air in the hot air branch pipe 5 enters the top of the air chamber 6 through the air distribution plate 52, thereby providing hot air to dry the biomass material transported on the bearing layer of the conveyor belt 7.

[0044] The dried biomass material conveyed by the conveyor belt 7 falls from the discharge port of the drying bin under the joint action of the discharge gear 3 and the ash baffle 31. The discharge gear 3 is installed on the conveying roller. When the material moves from the bearing layer (upper layer) of the conveyor belt 7 to the return layer (lower layer), the discharge gear 3 rotates counterclockwise, and the material stripping plate on the discharge gear 3 and the conveyor belt 7 rotate in opposite directions to each other, so that the material can be discharged stably. At the same time, the dried material can be slightly crushed. If some material is still stuck on the conveyor belt, the ash baffle 31 can scrape it away and drop it into the discharge port of the drying bin.

[0045] The hot air main pipe 4 is provided with a first flow meter 41 with a regulating valve, and each hot air branch pipe 5 is provided with a second flow meter 51 with a regulating valve. Each hot air branch pipe 5 is also sleeved with a pipe clamp 53. The hot air main pipe 4 and each hot air branch pipe 5 are supported by a bracket 12.

[0046] Several thermocouples and moisture meters 8 are evenly arranged on the top of the drying bin along the conveying direction to monitor the hot air temperature and the moisture content of the material in real time.

[0047] An observation window 11 is provided on the side wall of the drying bin for observing the drying condition of the biomass material in the drying bin.

[0048] A loading port scale baffle 1 that can move up and down is provided at the loading port of the drying bin for regulating and measuring the material thickness.

[0049] The drying chamber is also provided with a flue gas collection port 9 and an exhaust port 10. The flue gas collection port 9 is used to collect the gas generated during the drying process in real time, and use a flue gas analyzer to monitor and analyze the gas pollutant data online; the exhaust port 10 is used to exhaust the hot air introduced into the drying chamber.

[0050] The transmission belt 7 is operated through the conveying device.

[0051] A biomass drying method, the specific process is as follows:

[0052] S1, biomass material enters the drying bin from the loading port and falls onto the carrying layer of the conveyor belt 7 through the loading gear 2. During the process, hot air passes through the hot air main pipe 4 and the hot air branch pipe 5 and enters the air chamber 6 between the carrying layer and the return layer of the conveyor belt 7. The hot air passes through the air distribution plate 52 to dry the biomass material conveyed on the carrying layer of the conveyor belt 7;

[0053] S2, during the drying process, i.e., during the conveyor belt 7, the hot air temperature and the moisture content of the material are monitored in real time by a thermocouple and a moisture meter 8. The gas generated during the drying process is collected in real time through a flue gas collection port 9, and the gas pollutant data is monitored and analyzed online using a flue gas analyzer;

[0054] S3, after the material is dried, that is, after being conveyed by the conveyor belt 7, it falls from the discharge port of the drying bin under the joint action of the discharge gear 3 and the dust baffle 31.

[0055] During the material drying process, the drying condition of the material can be checked through the observation window 11, and the material thickness, hot air temperature (drying temperature), hot air speed and the travel speed of the conveyor belt 7 at the feeding port of the drying bin can be adjusted according to the real-time monitoring of the material moisture content and gas pollutant data.

[0056] The specific control methods are as follows:

[0057] Material thickness control: After raising / lowering the feed port scale baffle 1 to the corresponding scale position, the biomass material is dropped from the feed port onto the conveyor belt 7, and then the conveyor device is opened to transport the biomass material. In this embodiment, by moving the feed port scale baffle 1 up and down, the material thickness can be controlled to 50-100mm;

[0058] The drying temperature, hot air speed and conveyor belt travel speed are controlled in real time according to the moisture content of the material: based on the real-time monitored moisture content data of the biomass material on the carrying layer of the conveyor belt 7, if the moisture content of the material is too high, the travel speed of the conveyor belt 7 is slowed down and / or the hot air speed is increased and / or the drying temperature is increased. When increasing the drying temperature, it is also necessary to check the online analysis data of the flue gas analyzer in real time to avoid the generation of gaseous pollutants; if the moisture content of the material is too low, the travel speed of the conveyor belt 7 is accelerated and / or the hot air speed is reduced and / or the drying temperature is lowered.

[0059] Drying temperature control: The drying temperature is increased in a stepwise manner, starting with a low temperature (0-100°C) for a period of stabilization before drying at a high temperature (100-350°C). During the temperature increase, the online analysis data of the flue gas analyzer should be monitored in real time to avoid the formation of gaseous pollutants. In this embodiment, the low temperature is controlled at 50-80°C, and the high temperature is controlled at 140-250°C.

[0060] Hot air speed control: Hot air passes through the hot air main pipe 4 and the hot air branch pipe 5, entering the air chamber 6 between the carrier layer and the return layer of the conveyor belt 7. To control the hot air speed, the first flowmeter 41 on the hot air main pipe 4 is used to adjust the opening of the regulating valve thereon to ensure that the air speed through the hot air main pipe 4 reaches the required speed. The second flowmeter 51 on the hot air branch pipe 5 is then used to adjust the opening of the regulating valve thereon to ensure that the air speed reaches the required drying speed. In this embodiment, the air speed is controlled at 0.5-1.2 m / s.

[0061] The present invention implements a structural design of a drying device including a loading gear 2, a discharging gear 3, and an air distribution plate 52, thereby ensuring stable loading and discharging of light biomass and uniform distribution of hot air. By adjusting parameters such as the thickness, moisture content, drying temperature, and wind speed of the biomass raw material, different types of biomass can be dried while avoiding the generation of gaseous pollutants.

[0062] Example 1

[0063] In this embodiment, corn stalks are used as biomass raw materials with an initial moisture content of 55%. The scale baffle 1 of the feeding port is raised to 50 mm and fixed, and the corn stalks are dropped onto the conveyor belt 7 through the feeding gear 2. The conveyor is turned on, and the travel speed is maintained at 1 mm / s. At the same time, the hot air device is turned on, and the opening of the regulating valve is adjusted by reading the first flow meter 41 with a regulating valve on the hot air main pipe 4. After ensuring that the wind speed through the hot air main pipe 41 meets the requirements, the opening of the regulating valve is adjusted according to the reading of the second flow meter 51 with a regulating valve on the hot air branch pipe 5. At the same time, the air distribution plate 52 automatically adjusts the opening and closing according to the pressure difference change in the air chamber 6 to ensure uniform distribution of hot air, so that the hot air speed is maintained at 0.4 m / s. The initial temperature of the hot air is set The temperature was set to 60°C, and the temperature and moisture content data were recorded in real time by a thermocouple and a moisture meter 8. After 30 minutes, the moisture content of the corn straw was still 45%. At this time, the hot air temperature was increased to 80°C. After another 3.5 hours, the flue gas analyzer did not detect any gaseous pollutants during the process. According to the data, the moisture content of the corn straw dropped to 25%, so the wind speed was increased to 0.8m / s, and the material was found to be moving normally through the observation window 11. After 2 hours, the moisture content of the corn straw dropped to 10%, and the dried corn straw was collected and stored by the unloading gear 3 and the ash baffle 31, successfully preparing a biomass alternative fuel with excellent performance.

[0064] Example 2

[0065] In this embodiment, discarded sugarcane straw is used as biomass raw material with an initial moisture content of 70%. The feed port scale baffle 1 is raised to 100mm and fixed, and the sugarcane straw is dropped onto the conveyor belt 7 through the feed gear 2. The conveyor is turned on, and the travel speed is maintained at 1mm / s. At the same time, the hot air device is turned on, and the opening of the regulating valve is adjusted by reading the first flow meter 41 with a regulating valve on the hot air main pipe 4 to ensure that the wind speed through the hot air main pipe 41 meets the requirements. Then, the opening of the regulating valve is adjusted according to the reading of the second flow meter 51 with a regulating valve on the hot air branch pipe 5. At the same time, the air distribution plate 52 automatically adjusts the opening and closing according to the pressure difference change in the air chamber 6 to ensure uniform distribution of hot air, so that the hot air speed is maintained at 0.8m / s. The initial temperature of the hot air is set to 80℃. The temperature and moisture content data are recorded in real time by the thermocouple and moisture meter 8. After 30 minutes, the moisture content of the sugarcane straw is still 65%. At this time, the hot air temperature is increased to 350℃. After 2 hours, the flue gas analyzer detects CO, CO2, NOx The gas pollutants were removed and the hot air temperature was immediately reduced to 100°C and the wind speed was increased to 1.2m / s. After another 4 hours, the moisture content of the sugarcane straw was reduced to 25%. During the process, the material was observed through the observation window 11 to see that the movement was normal. After 2 hours, the moisture content of the sugarcane straw was reduced to 10%, and a biomass alternative fuel with excellent performance was successfully prepared.

[0066] Example 3

[0067] In this embodiment, fallen camphor tree leaves are used as biomass raw materials with an initial moisture content of 35%. The feed port scale baffle 1 is raised to 80 mm and fixed, and the camphor tree leaves are dropped onto the conveyor belt 7 through the feed gear 2. The conveyor is turned on, and the travel speed is maintained at 1 mm / s. At the same time, the hot air device is turned on, and the opening of the regulating valve is adjusted by reading the first flow meter 41 with a regulating valve on the hot air dry pipe 4. After ensuring that the wind speed through the hot air dry pipe 41 meets the requirements, the opening of the regulating valve is adjusted according to the reading of the second flow meter 51 with a regulating valve on the hot air branch pipe 5. At the same time, the air distribution plate 52 automatically adjusts the opening and closing according to the pressure difference change in the air chamber 6 to ensure uniformity. The hot air was distributed so that the hot air velocity was maintained at 0.6 m / s, and the initial hot air temperature was set to 60°C. The temperature and moisture content data were recorded in real time by a thermocouple and a moisture meter 8. After 1 hour, the moisture content of the camphor tree leaves was 30%. At this time, the hot air temperature was increased to 120°C. After 20 minutes, no gaseous pollutants were detected by the flue gas analyzer. After another 4 hours, the moisture content of the camphor tree leaves dropped to 10%. The dried leaves were collected and stored by the unloading gear 3 and the ash baffle 31, and an excellent biomass alternative fuel was successfully prepared.

[0068] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A biomass drying device, characterized in that: include: A drying chamber for drying biomass materials, a conveyor belt (7) provided in the drying chamber for conveying the biomass materials, and an air chamber (6) provided in the drying chamber for providing hot air to dry the biomass materials on the conveyor belt (7); A plurality of air chambers (6) are evenly arranged along the conveying direction between the carrying layer and the return layer of the conveyor belt (7). An air distribution plate (52) is provided in the air chamber (6). Hot air input into the air chamber (6) passes through the air distribution plate (52) to dry the biomass material conveyed on the carrying layer of the conveyor belt (7). At the same time, the air distribution plate (52) automatically adjusts its opening and closing degree according to the pressure difference change in the air chamber (6) to ensure even distribution of the hot air.

2. A biomass drying device according to claim 1, characterized in that: A loading port scale baffle (1) that can move up and down is provided at the loading port of the drying bin for adjusting the thickness of the material.

3. The biomass drying device according to claim 1, characterized in that: A loading gear is provided at the loading port of the drying bin, and biomass materials enter the loading port of the drying bin and fall onto the conveyor belt (7) through the loading gear (2); a discharge gear (3) and an ash baffle (31) are provided at the discharge port of the drying bin, and the biomass materials, after being conveyed by the conveyor belt (7), fall from the discharge port of the drying bin under the joint action of the discharge gear (3) and the ash baffle (31).

4. The biomass drying device according to claim 1, characterized in that: Each air chamber (6) is connected to the hot air dry pipe (4) through the corresponding hot air branch pipe (5), and the hot air is transported to each hot air branch pipe (5) through the hot air dry pipe (4). Each hot air branch pipe (5) transports the hot air to the corresponding air chamber (6). An air distribution plate (52) is arranged above the hot air branch pipe (5) and is connected to the air chamber (6) through a gravity hinge. A first flow meter (41) with a regulating valve is provided on the hot air dry pipe (4), and a second flow meter (51) with a regulating valve is provided on each hot air branch pipe (5).

5. The biomass drying device according to claim 1, characterized in that: A plurality of thermocouples and moisture meters (8) are evenly arranged on the top of the drying bin along the conveying direction for real-time monitoring of the hot air temperature and the moisture content of the material; an observation window (11) is provided on the side wall of the drying bin for observing the drying condition of the biomass material in the drying bin; a flue gas collection port (9) is provided in the drying bin for real-time collection of the gas generated during the drying process, and a flue gas analyzer is used for online monitoring and analysis to analyze the gas pollutant data; and an exhaust port (10) is also provided in the drying bin for exhausting the hot air introduced into the drying bin.

6. A biomass drying method, characterized in that: A biomass drying device applicable to any one of claims 1 to 5 above, the specific process is as follows: S1, biomass material enters from the loading port of the drying bin and falls onto the bearing layer of the conveyor belt (7) through the loading gear (2). During the process, hot air passes through the hot air main pipe (4) and the hot air branch pipe (5) and enters the air chamber (6) between the bearing layer and the return layer of the conveyor belt (7). The hot air in the air chamber (6) dries the biomass material conveyed on the bearing layer of the conveyor belt (7) through the air distribution plate (52); S2, during the drying process of the material, i.e., during the conveyor belt (7), the hot air temperature and the moisture content of the material are monitored in real time by a thermocouple and a moisture meter (8), and the gas generated during the drying process is collected in real time through a flue gas collection port (9) and the gas pollutant data are monitored and analyzed online using a flue gas analyzer; S3, after the material is dried, that is, after being conveyed by the conveyor belt (7), it falls from the discharge port of the drying bin under the joint action of the discharge gear (3) and the dust baffle (31).

7. A biomass drying method according to claim 6, characterized in that: According to the moisture content of the material, the drying temperature, hot air temperature, hot air speed and conveyor belt speed are controlled in real time: If the moisture content of the material is higher than a set threshold, the speed of the conveyor belt (7) is slowed down and / or the hot air speed is increased and / or the drying temperature is increased; if the moisture content of the material is too low, the speed of the conveyor belt (7) is accelerated and / or the hot air speed is reduced and / or the drying temperature is lowered.

8. A biomass drying method according to claim 6 or 7, characterized in that: Check the gas pollutant data monitored and analyzed by the flue gas analyzer in real time. If the pollutant concentration is higher than the set threshold, reduce the drying temperature to avoid the generation of gas pollutants.

9. An electronic device, characterized in that: The method comprises a processor, a memory and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the method for drying biomass according to any one of claims 6 to 8 is implemented.

10. A computer program product, characterized in that The method comprises a computer program / instruction, which, when executed by a processor, implements a biomass drying method according to any one of claims 6 to 8.

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