Biomass drying machine capable of being heated uniformly

Abstract

The utility model relates to the field of dryers, in particular to a uniformly-heated biomass dryer which comprises a drying box, a combustion furnace, a feeding hopper, an air blower, an air outlet pipe, a rotating disc, an air inlet pipe, an induced draft fan, a fan wall and a moisture discharging pipe, the drying box comprises a hot air chamber, a drying chamber and an induced draft chamber, and the drying chamber is located between the hot air chamber and the induced draft chamber; the combustion furnace is located in the air inducing chamber and fixedly installed at the bottom end in the drying box. The feeding hopper is connected with the combustion furnace through a material conveying pipe, and an electronic igniter is arranged on the material conveying pipe. The air blower is fixedly installed on the outer wall of the drying box and connected with the air inlet end of the combustion furnace. One end of the air outlet pipe is located outside the drying box, and the other end is connected with the air outlet end of the combustion furnace; the rotating disc is located in the drying chamber and connected with the drying box through a first driving motor, and the rotating disc is used for placing a target drying object; one end of the air inlet pipe is positioned outside the drying box, and the other end is positioned in the air inducing chamber and faces the combustion furnace; the induced draft fan sucks hot air generated in the induced draft chamber into the hot air chamber through the induced draft pipeline; the fan wall is located between the hot air chamber and the drying chamber and fixedly connected with the drying box, a plurality of circulating fans are fixedly installed on the fan wall, and the circulating fans blow air towards target drying objects; one end of the moisture removal pipe is located outside the drying box, the other end of the moisture removal pipe is located in the drying chamber, and a moisture removal fan is fixedly installed at the end, located in the drying chamber, of the moisture removal pipe. The drying device has the effect that dried objects are evenly heated.

Description

Technical Field

[0001] The present application relates to the field of dryers, and in particular to a biomass dryer with uniform heating. Background Art

[0002] Biomass dryer is suitable for drying wood chips, sawdust, bamboo chips, wood shavings, barley straw, oat straw, wheat straw, rye straw, rice straw, sorghum straw, corn straw, as well as potato vines and legume stems, including soybean straw, broad bean straw, pea straw, cowpea straw, lupine straw and peanut vines.

[0003] Currently, biomass dryers use the heat generated by the combustion of biomass pellets to dry the material inside the drying box. However, the side of the material close to the combustion furnace is heated more, while the side of the material away from the combustion furnace is heated less, resulting in uneven heating of the material. Utility Model Content

[0004] In order to ensure that the dried material is heated evenly, the present application provides a biomass dryer with even heating.

[0005] The present application provides a biomass dryer with uniform heating, which adopts the following technical solutions:

[0006] A biomass dryer with uniform heating, comprising:

[0007] A drying box, comprising a hot air chamber, a drying chamber and an induced draft chamber, wherein the drying chamber is located between the hot air chamber and the induced draft chamber;

[0008] The combustion furnace is located in the induced draft chamber and is fixedly installed at the bottom end of the drying box;

[0009] A feeding hopper connected to the combustion furnace via a feeding pipe, wherein the feeding pipe is provided with an electronic igniter;

[0010] A blower, which is fixedly mounted on the outer wall of the drying box and connected to the air inlet end of the combustion furnace;

[0011] An air outlet pipe, one end of which is located outside the drying box and the other end is connected to the air outlet end of the combustion furnace;

[0012] A rotating disk is located in the drying chamber and is connected to the drying box via a first driving motor. The rotating disk is used to place target drying objects.

[0013] An air inlet pipe, one end of which is located outside the drying box and the other end is located in the induced draft chamber and faces the combustion furnace;

[0014] An induced draft fan draws the hot air generated in the induced draft chamber into the hot air chamber through an induced draft duct;

[0015] A fan wall is located between the hot air chamber and the drying chamber and is fixedly connected to the drying box. A plurality of circulating fans are fixedly mounted on the fan wall and blow air toward the target drying object.

[0016] A dehumidification pipe, one end of which is located outside the drying box and the other end is located in the drying chamber; a dehumidification fan is fixedly installed at the end of the dehumidification pipe located in the drying chamber.

[0017] Optionally, the combustion furnace includes a furnace body and two groups of heat dissipation tubes fixedly mounted on the furnace body, one group of heat dissipation tubes includes 12 heat dissipation tubes, and the bottom end of the furnace body is fixedly connected to the bottom end of the interior of the drying box.

[0018] Optionally, a connecting hole is provided at the front end of the drying box, a first groove and a second groove are provided on the opposite side hole walls of the connecting hole, an upper slide groove is provided on the top hole wall of the connecting hole, and a lower slide groove is provided on the bottom hole wall of the connecting hole. A sliding door is provided on the drying box, and the sliding door slides from the first groove through the upper slide groove and the lower slide groove into the second groove.

[0019] Optionally, a through hole is provided at the front end of the drying box, the through hole is connected to the second groove, a limiting groove corresponding to the through hole is provided on the sliding door, a limiting spring is fixedly installed in the limiting groove, and a limiting block is fixedly installed at one end of the limiting spring away from the bottom of the limiting groove.

[0020] Optionally, the end of the limit block facing away from the limit spring is in the shape of an inclined surface facing the sliding direction of the sliding door.

[0021] Optionally, a rectangular material control bin is provided on the feeding hopper, and the rectangular material control bin is rotatably connected to the rectangular material control bin through a second drive motor, and the top of the rectangular material control bin is open, and a right-angled trapezoidal block is fixedly installed on the relative inner wall of the feeding hopper, and the right-angled trapezoidal block is located above the rectangular material control bin, and the short side ends of the right-angled trapezoidal block face each other, and the right-angled side ends of the right-angled trapezoidal block face the bottom end of the feeding hopper, and the right-angled side ends of the right-angled trapezoidal block are provided with arc chamfers at the edges near the short side ends of the right-angled trapezoidal block, and the arc chamfers abut the top edge of the rectangular material control bin.

[0022] Optionally, a receiving groove is provided at the short side end of the right-angled trapezoidal block, and a baffle is installed in the receiving groove through an electric telescopic shaft.

[0023] Optionally, a pressure sensor is fixedly installed at the bottom end of the rectangular material control bin, and a support plate is slidably installed in the rectangular material control bin, and the bottom end of the support plate abuts against the top end of the pressure sensor.

[0024] Optionally, a screen is fixedly installed horizontally in the feeding hopper, and the screen is located above the right-angled trapezoidal block.

[0025] Optionally, the drying box is equipped with a temperature sensor, a humidity sensor and a wind speed sensor, and a control box is fixedly installed on the outer wall of the drying box. The control box is connected to the temperature sensor, humidity sensor, wind speed sensor, electronic ignition, blower, first drive motor, induced draft fan, circulating fan, dehumidification fan, second drive motor, electric telescopic shaft and pressure sensor signals through a PLC controller.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. The target drying item is placed on the rotating disk. After the air passes through the heat dissipation pipe and becomes hot air, it is drawn into the hot air chamber by the induced draft fan. The circulating fan converts the hot air in the hot air chamber into hot air and blows it toward the target drying item. The first drive motor drives the rotating disk, which in turn rotates the target drying item, thereby heating the target drying item more evenly. At the same time, some of the hot air is discharged from the drying box through the dehumidification motor, while the remaining hot air is returned to the hot air chamber through the induced draft duct, achieving hot air recycling.

[0028] 2. By adding biomass pellets into the furnace through the hopper and igniting the biomass pellets through the electronic igniter, the blower blows air into the furnace to accelerate the flow of air in the furnace, so that the biomass pellets are fully burned without sparks and smoke, with high efficiency. At the same time, in the absence of smoke filtration equipment, the air will be discharged through the outlet pipe.

[0029] 3. Fully automatic control through the control box, saving manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a biomass dryer with uniform heating according to an embodiment of the present application.

[0031] Figure 2 This is a front sectional view of the front end of a drying box of a biomass dryer with uniform heating according to an embodiment of the present application.

[0032] Figure 3 This is a top-down cross-sectional view of the front end of a drying box of a biomass dryer with uniform heating according to an embodiment of the present application.

[0033] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0034] Figure 5 This is a cross-sectional view of a drying box of a biomass dryer with uniform heating according to an embodiment of the present application.

[0035] Figure 6 This is a structural schematic diagram of a combustion furnace (without a top portion) of a biomass dryer with uniform heating according to an embodiment of the present application.

[0036] Figure 7 This is a cross-sectional view of a feeding hopper of a biomass dryer with uniform heating according to an embodiment of the present application.

[0037] Figure 8 This is a schematic diagram of the rotation of a rectangular control bin of a biomass dryer with uniform heating according to an embodiment of the present application.

[0038] Figure 9 This is a cross-sectional view of a rectangular control bin of a biomass dryer with uniform heating according to an embodiment of the present application.

[0039] Figure 10 This is a system schematic diagram of a biomass dryer with uniform heating according to an embodiment of the present application.

[0040] Explanation of reference numerals: 10, drying box; 101, hot air chamber; 102, drying chamber; 103, induced draft chamber; 104, first groove; 105, second groove; 106, upper chute; 107, lower chute; 108, connecting hole; 109, through hole; 20, combustion furnace; 201, furnace body; 202, heat dissipation pipe; 30, feeding hopper; 301, feeding pipe; 302, electronic igniter; 40, blower; 50, air outlet pipe; 60, rotating disk; 601, first drive motor; 70, air inlet pipe; 80, induced draft fan; 801, induced draft duct; 90, fan wall; 901, circulating fan; 10 0. Dehumidification pipe; 1001. Dehumidification fan; 110. Sliding door; 1101. Limiting groove; 1102. Limiting spring; 1103. Limiting block; 120. Rectangular material control bin; 1201. Second drive motor; 1202. Auxiliary chute; 1203. Support plate; 1204. Pressure sensor; 130. Right-angle trapezoidal block; 1301. Arc chamfer; 1302. Accommodating groove; 1303. Electric telescopic shaft; 1304. Baffle; 140. Screen; 150. Temperature sensor; 160. Humidity sensor; 170. Wind speed sensor; 180. Control box; 190. PLC controller. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-10 This application is described in further detail.

[0042] The embodiment of the present application discloses a biomass dryer with uniform heating.

[0043] Reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 A biomass dryer with uniform heating includes a drying box 10, a combustion furnace 20, a feeding hopper 30, a blower 40, an air outlet pipe 50, a rotating disk 60, an air inlet pipe 70, an induced draft fan 80, a fan wall 90 and a moisture removal pipe 100.

[0044] The drying box 10 includes a hot air chamber 101, a drying chamber 102, and an induced draft chamber 103. The drying chamber 102 is located between the hot air chamber 101 and the induced draft chamber 103. The combustion furnace 20 is located in the induced draft chamber 103. The combustion furnace 20 includes a furnace body 201 and two groups of heat dissipation pipes 202 fixedly mounted on the furnace body 201. One group of heat dissipation pipes 202 includes 12 heat dissipation pipes 202. The bottom end of the furnace body 201 is fixedly connected to the bottom end of the interior of the drying box 10. The feeding hopper 30 is fixedly mounted on the outer wall of the drying box 10 and connected to the combustion furnace 20 via a feed pipe 301. The feeding hopper 30 is used to add biomass pellets to the combustion furnace 20. The feed pipe 301 is fixedly mounted with an electronic igniter 302 for igniting the biomass pellets. The blower 40 is fixedly mounted on the outer wall of the drying box 10 and connected to the air inlet of the combustion furnace 20. The blower 40 and the feeding hopper 30 are located on the same outer wall of the drying box 10. One end of the air outlet pipe 50 is located outside the drying box 10, and the other end is connected to the air outlet of the combustion furnace 20. It is important to note that the bottom end of the inner portion of the feeding hopper 30 is inclined toward the feed pipe 301, which facilitates the flow of biomass particles into the feed pipe 301.

[0045] The staff adds the biomass pellets into the furnace body 201 through the hopper 30 and ignites the biomass pellets through the electronic igniter 302. The blower 40 blows air into the furnace body 201 to accelerate the flow of air in the furnace body 201, so that the biomass pellets are fully burned without sparks and smoke, with high efficiency. At the same time, in the absence of smoke purification filtering equipment, the air will be discharged through the outlet pipe 50.

[0046] The rotating disk 60 is located within the drying chamber 102 and is connected to the drying box 10 via a first drive motor 601. The first drive motor 601 is vertically fixed to the bottom of the drying box 10. The rotating disk 60 is fixedly mounted on top of the first drive motor 601 and is used to place the target drying items. An air inlet duct 70 has one end located outside the drying box 10 and the other end located in the induced draft chamber 103, facing the combustion furnace 20. The air inlet duct 70 is used to draw air into the induced draft chamber 103. The air is converted into hot air after passing through the heat dissipation pipe 202. The induced draft fan 80 draws the hot air generated in the induced draft chamber 103 into the hot air chamber 101 via the induced draft duct 801. The induced draft duct 801 is fixedly mounted on the top of the drying box 10, with one end located in the induced draft chamber 103 and the other end located in the hot air chamber 101. The fan wall 90 is located between the hot air chamber 101 and the drying chamber 102 and is fixedly connected to the drying box 10. Multiple circulating fans 901 are fixedly mounted on the fan wall 90, blowing air toward the target items. A dehumidification pipe 100 has one end located outside the drying box 10 and the other end running through the induced air duct 801 within the drying chamber 102. A dehumidification fan 1001 is fixedly mounted on the end of the dehumidification pipe 100 located in the drying chamber 102. This fan 1001 is used to quickly and efficiently remove moisture from the drying box 10, maintaining a suitable humidity environment.

[0047] The staff places the target drying object on the rotating disk 60. After the air is converted into hot air through the heat dissipation pipe 202, the hot air is sucked into the hot air chamber 101 through the induced draft duct 801 by the induced draft fan 80. The circulating fan converts the hot air in the hot air chamber 101 into hot air and blows it toward the target drying object. Since the first driving motor 601 drives the rotating disk 60 to rotate, the rotating disk 60 drives the target drying object to rotate, thereby making the target drying object heated more evenly. Part of the hot air will be discharged from the drying box 10 through the dehumidification motor, and the other part of the hot air will flow back to the hot air chamber 101 through the induced draft duct 801, thereby achieving the recycling of hot air.

[0048] To facilitate placement of the target drying items on the rotating disk 60, the drying box 10 has a connection hole 108 at the front end. A first groove 104 and a second groove 105 are defined on opposite sides of the connection hole 108. An upper groove 106 is defined at the top wall of the connection hole 108, and a lower groove 107 is defined at the bottom wall of the connection hole 108. The drying box 10 is provided with a sliding door 110, which slides from the first groove 104 through the upper groove 106 and lower groove 107 into the second groove 105. A through hole 109 is defined at the front end of the drying box 10, communicating with the second groove 105. The sliding door 110 has a stopper groove 1101 corresponding to the through hole 109. A stopper spring 1102 is fixedly mounted within the stopper groove 1101, and a stopper block 1103 is fixedly mounted on the end of the stopper spring 1102 facing away from the bottom of the stopper groove 1101. One end of the limiting block 1103 facing away from the limiting spring 1102 is in the shape of an inclined surface facing the sliding direction of the sliding door 110 .

[0049] When the staff needs to place the target drying object, the staff slides the sliding door 110 in the direction of the first groove 104. Since the end of the limit block 1103 away from the limit spring 1102 is inclined, the hole wall of the through hole 109 will exert a pressure on the limit block 1103 toward the inside of the limit groove 1101, causing the limit block 1103 to slide into the limit groove 1101, thereby causing the sliding door 110 to slide out of the second groove 105 and slide into the first groove 104. After the target drying object is placed on the rotating disk 60, the staff slides the sliding door 110 in the direction of the second groove 105. When sliding door 110 is moved, because the end of stop block 1103 facing away from stop spring 1102 is inclined, the wall of connecting hole 108 applies pressure to stop block 1103 toward the interior of stop slot 1101, causing stop block 1103 to slide into stop slot 1101 and compress stop spring 1102. This allows sliding door 110 to slide into second groove 105. When stop slot 1101 aligns with through hole 109, stop spring 1102 resets, causing stop block 1103 to slide out of stop slot 1101 and clamp onto through hole 109. It should be noted that even low wind speeds will not cause sliding door 110. It should also be noted that while the target items are being dried, hot air from inside drying box 10 does not escape through the gap between slide door 110 and drying box 10.

[0050] Reference Figure 7 、 Figure 8 and Figure 9To control the amount of biomass pellets, a rectangular control bin 120 is provided inside the feeding hopper 30. The rectangular control bin 120 is horizontally rotatably connected to the rectangular control bin 120 via a second drive motor 1201. The top of the rectangular control bin 120 is open. A right-angled trapezoidal block 130 is fixedly mounted on the opposite inner wall of the feeding hopper 30. The right-angled trapezoidal block 130 is located above the rectangular control bin 120. The long sides of the right-angled trapezoidal block 130 are fixedly connected to the feeding hopper 30, and the short sides of the right-angled trapezoidal block 130 face each other. The right-angled sides of the right-angled trapezoidal block 130 face the bottom of the feeding hopper 30. The right-angled sides of the right-angled trapezoidal block 130 are provided with arc chamfers 1301 at the edges of the right-angled trapezoidal blocks 130 near the short sides of the right-angled trapezoidal blocks 130, and the arc chamfers 1301 abut the top edge of the rectangular control bin 120. A receiving slot 1302 is defined at the short end of the right-angled trapezoidal block 130. A baffle 1304 is mounted within this slot via an electric telescopic shaft 1303. The baffle 1304's end, facing away from the electric telescopic shaft 1303, is inclined upward. A pressure sensor 1204 is fixedly mounted at the bottom of the rectangular material control bin 120. An auxiliary chute 1202 is vertically defined within the rectangular material control bin 120. A support plate 1203 is mounted on this auxiliary chute 1202, the bottom of which abuts the top of the pressure sensor 1204. It should be noted that the front end of the rectangular material control bin 120 is square.

[0051] Workers introduce biomass pellets into the hopper 30. The biomass pellets fall between two opposing baffles 1304 into the rectangular control silo 120. Since the distance between the two opposing baffles 1304 can be adjusted by a motorized telescopic shaft 1303, the flow rate of the biomass pellets into the rectangular control silo 120 can be controlled. A pressure sensor 1204 weighs the biomass pellets in the rectangular control silo 120. When the required amount is reached, the two opposing baffles 1304 rapidly close under the action of the motorized telescopic shaft 1303. Subsequently, the second drive motor 1201 drives the rectangular control silo 120 to rotate, allowing the biomass pellets in the rectangular control silo 120 to slide through the feed pipe 301 into the combustion furnace 20. It should be noted that since some biomass pellets still fall into the empty rectangular silo during the closing process of the two opposing baffles 1304, the actual weight of the biomass pellets exceeds the required amount by 0.1 kg to 0.3 kg. This error is negligible due to its small size.

[0052] Reference Figure 7 A screen 140 is fixedly installed horizontally in the feeding hopper 30, and the screen 140 is located above the right-angled trapezoidal block 130. The screen 140 can filter out large particles of impurities contained in the biomass particles, and at the same time, the screen 140 can reduce the speed at which the biomass particles fall.

[0053] Reference Figure 1 、 Figure 5、 Figure 7 、 Figure 9 and Figure 10 The drying box 10 is equipped with a temperature sensor 150, a humidity sensor 160, and a wind speed sensor 170. A control box 180 is fixedly mounted on the outer wall of the drying box 10. The control box 180 is connected to the temperature sensor 150, humidity sensor 160, wind speed sensor 170, electronic igniter 302, blower 40, first drive motor 601, induced draft fan 80, circulating fan 901, dehumidification fan 1001, second drive motor 1201, electric telescopic shaft 1303, and pressure sensor 1204 via a PLC controller. It should be noted that the control box 180 has a display screen.

[0054] The temperature sensor 150 is used to detect the temperature within the drying box 10 and output a temperature detection signal. The humidity sensor 160 is used to detect the humidity within the drying box 10 and output a humidity detection signal. The wind speed sensor 170 is used to detect the wind speed within the drying box 10 and output a wind speed detection signal. A PLC controller is used to receive the temperature detection signal, the humidity detection signal, and the wind speed detection signal, and transmit the values ​​reflected by the temperature detection signal, the humidity detection signal, and the wind speed detection signal to the control box 180, which displays the values ​​on the display screen of the control box 180.

[0055] The control box 180 also controls, via a PLC controller, the ignition of the electronic igniter 302, the opening and closing of the blower 40, the opening and closing of the first drive motor 601, the opening and closing of the induced draft fan 80, the opening and closing of the circulation fan 901, the opening and closing of the dehumidification fan 1001, the opening and closing of the second drive motor 1201, and the opening and closing of the electric telescopic shaft 1303. Simultaneously, the control box 180 also controls, via a PLC controller, the wind speeds of the blower 40, the induced draft fan 80, the circulation fan 901, and the dehumidification fan 1001.

[0056] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A biomass dryer with uniform heating, characterized by: include; A drying box (10), the drying box (10) comprising a hot air chamber (101), a drying chamber (102) and an air induction chamber (103), wherein the drying chamber (102) is located between the hot air chamber (101) and the air induction chamber (103); A combustion furnace (20), the combustion furnace (20) is located in the induced draft chamber (103) and is fixedly installed at the bottom end of the drying box (10); A feeding hopper (30), wherein the feeding hopper (30) is connected to the combustion furnace (20) via a feeding pipe (301), and an electronic igniter (302) is provided on the feeding pipe (301); A blower (40), the blower (40) is fixedly mounted on the outer wall of the drying box (10) and connected to the air inlet end of the combustion furnace (20); an air outlet pipe (50), one end of which is located outside the drying box (10) and the other end of which is connected to the air outlet end of the combustion furnace (20); a rotating disk (60), the rotating disk (60) being located in the drying chamber (102) and connected to the drying box (10) via a first driving motor (601), the rotating disk (60) being used to place target drying objects; an air inlet pipe (70), one end of the air inlet pipe (70) being located outside the drying box (10) and the other end being located in the induced draft chamber (103) and facing the combustion furnace (20); An induced draft fan (80), the induced draft fan (80) draws hot air generated in the induced draft chamber (103) into the hot air chamber (101) through an induced draft duct (801); A fan wall (90), the fan wall (90) is located between the hot air chamber (101) and the drying chamber (102), and is fixedly connected to the drying box (10). A plurality of circulating fans (901) are fixedly mounted on the fan wall (90), and the circulating fans (901) blow air toward the target drying object; A dehumidification pipe (100), one end of the dehumidification pipe (100) is located outside the drying box (10), and the other end is located in the drying chamber (102); a dehumidification fan (1001) is fixedly installed at the end of the dehumidification pipe (100) located in the drying chamber (102).

2. The biomass dryer with uniform heating according to claim 1, characterized in that: The combustion furnace (20) comprises a furnace body (201) and two groups of heat dissipation pipes (202) fixedly mounted on the furnace body (201), wherein one group of heat dissipation pipes (202) comprises 12 heat dissipation pipes (202). The bottom end of the furnace body (201) is fixedly connected to the bottom end of the interior of the drying box (10).

3. The biomass dryer with uniform heating according to claim 1, characterized in that: The front end of the drying box (10) is provided with a connecting hole (108), and the opposite side hole walls of the connecting hole (108) are provided with a first groove (104) and a second groove (105). The top hole wall of the connecting hole (108) is provided with an upper slide groove (106), and the bottom hole wall of the connecting hole (108) is provided with a lower slide groove (107). The drying box (10) is provided with a sliding door (110), and the sliding door (110) slides from the first groove (104) through the upper slide groove (106) and the lower slide groove (107) into the second groove (105).

4. The biomass dryer with uniform heating according to claim 3, characterized in that: A through hole (109) is provided at the front end of the drying box (10), and the through hole (109) is communicated with the second groove (105). A limiting groove (1101) corresponding to the through hole (109) is provided on the sliding door (110), and a limiting spring (1102) is fixedly installed in the limiting groove (1101). A limiting block (1103) is fixedly installed at one end of the limiting spring (1102) away from the bottom of the limiting groove (1101).

5. The biomass dryer with uniform heating according to claim 4, characterized in that: The end of the limit block (1103) that is away from the limit spring (1102) is in the shape of an inclined surface facing the sliding direction of the sliding door (110).

6. The biomass dryer with uniform heating according to claim 1, characterized in that: The feeding hopper (30) is provided with a rectangular material control bin (120), and the rectangular material control bin (120) is rotatably connected to the rectangular material control bin (120) via a second drive motor (1201). The top of the rectangular material control bin (120) is open, and a right-angled trapezoidal block (130) is fixedly installed on the inner wall relative to the feeding hopper (30). The right-angled trapezoidal block (130) is located above the rectangular material control bin (120), and the short sides of the right-angled trapezoidal block (130) face each other. The right-angled side of the right-angled trapezoidal block (130) faces the bottom end of the feeding hopper (30). The right-angled side of the right-angled trapezoidal block (130) is provided with an arc chamfer (1301) at the edge of the short side of the right-angled trapezoidal block (130), and the arc chamfer (1301) abuts against the top edge of the rectangular material control bin (120).

7. The biomass dryer with uniform heating according to claim 6, characterized in that: A receiving groove (1302) is provided at the short side end of the right-angled trapezoidal block (130), and a baffle (1304) is installed in the receiving groove (1302) via an electric telescopic shaft (1303).

8. The biomass dryer with uniform heating according to claim 7, characterized in that: A pressure sensor (1204) is fixedly mounted on the bottom end of the rectangular material control bin (120), and a support plate (1203) is slidably mounted inside the rectangular material control bin (120), with the bottom end of the support plate (1203) abutting against the top end of the pressure sensor (1204).

9. The biomass dryer with uniform heating according to claim 7, characterized in that: A screen (140) is fixedly installed horizontally in the feeding hopper (30), and the screen (140) is located above the right-angled trapezoidal block (130).

10. The biomass dryer with uniform heating according to claim 8, characterized in that: The drying box (10) is equipped with a temperature sensor (150), a humidity sensor (160) and a wind speed sensor (170). A control box (180) is fixedly installed on the outer wall of the drying box (10). The control box (180) is respectively connected to the temperature sensor (150), the humidity sensor (160), the wind speed sensor (170), the electronic igniter (302), the blower (40), the first drive motor (601), the induced draft fan (80), the circulating fan (901), the moisture exhaust fan (1001), the second drive motor (1201), the electric telescopic shaft (1303) and the pressure sensor (1204) through a PLC controller.

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