Biomass drying machine capable of being heated uniformly

Abstract

The invention 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 mounted in the air inducing chamber; the feeding hopper is connected with the combustion furnace; the air blower is installed on the outer wall of the drying box and connected with the air inlet end of the combustion furnace. The air outlet pipe is connected with the air outlet end of the combustion furnace; the rotating disc is mounted in the drying chamber; one end of the air inlet pipe is positioned outside the drying box; 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 a plurality of circulating fans blowing towards the target drying object are fixedly installed on the fan wall; and a moisture removal fan is mounted on 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 chips, wood shavings, barley straw, oat straw, wheat straw, rye straw, rice straw, sorghum straw, corn straw, as well as potato vines and bean stems, including soybean straw, broad bean straw, pea straw, cowpea straw, lupine straw and peanut vines.

[0003] At present, biomass dryers use the heat generated by the combustion of biomass particles to dry the dried materials inside the drying box. However, the side of the dried materials close to the combustion furnace is heated more, while the side of the dried materials away from the combustion furnace is heated less, resulting in uneven heating of the dried materials. Summary of the invention

[0004] In order to ensure uniform heating of the dried material, the present application provides a biomass dryer with uniform heating.

[0005] The present application provides a biomass dryer with uniform heating, which adopts the following technical solution: A biomass dryer with uniform heating, comprising: A drying box, the drying box comprising a hot air chamber, a drying chamber and an air induction chamber, the drying chamber being located between the hot air chamber and the air induction chamber; A combustion furnace, which is located in the draft chamber and fixedly installed at the bottom of the drying box; A feeding hopper, the feeding hopper is connected to the combustion furnace through a feeding pipe, and the feeding pipe is provided with an electronic igniter; A blower, the blower is fixedly mounted on the outer wall of the drying box and connected to the air inlet end of the combustion furnace; 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; A rotating disk, the rotating disk is located in the drying chamber and connected to the drying box via a first driving motor, the rotating disk is used to place target drying objects; An air inlet pipe, one end of which is located outside the drying box, and the other end of which is located in the induced draft chamber and faces the combustion furnace; An induced draft fan, wherein the induced draft fan draws the hot air generated in the induced draft chamber into the hot air chamber through an induced draft duct; A fan wall, which 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 installed on the fan wall, and the circulating fans blow air toward the target drying object; A dehumidification pipe, one end of which is located outside the drying box and the other end of which is located in the drying chamber; a dehumidification fan is fixedly installed at the end of the dehumidification pipe located in the drying chamber.

[0006] Optionally, the combustion furnace includes a furnace body and two groups of heat dissipation tubes fixedly installed 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.

[0007] 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, and 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.

[0008] 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.

[0009] Optionally, one 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.

[0010] 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 driving motor, the top of the rectangular material control bin is open, and a right-angled trapezoidal block is fixedly installed on the inner wall relative to the feeding hopper, the right-angled trapezoidal block is located above the rectangular material control bin, the short side ends of the right-angled trapezoidal block face each other, the right-angled side ends of the right-angled trapezoidal block face the bottom end of the inside of the feeding hopper, 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 are in contact with the top edge of the rectangular material control bin.

[0011] Optionally, a receiving groove is provided at the short side end of the right-angle trapezoidal block, and a baffle is installed in the receiving groove through an electric telescopic shaft.

[0012] 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.

[0013] Optionally, a screen is fixedly installed horizontally in the feeding hopper, and the screen is located above the right-angled trapezoidal block.

[0014] 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 igniter, 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.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: 1. By placing the target drying object on the rotating disk, the air becomes hot air through the heat dissipation pipe, and the hot air is attracted to the hot air chamber through the induced draft of the induced draft fan. The circulating fan converts the hot air in the hot air chamber into hot air and blows it to the target drying object. Since the first driving motor drives the rotating disk to rotate, the rotating disk drives the target drying object to rotate, so that the target drying object is heated more evenly. At the same time, part of the hot air will be discharged from the drying box through the dehumidification motor, and the other part of the hot air will flow back to the hot air chamber through the induced draft duct, so as to achieve the recycling of hot air.

[0016] 2. By adding biomass particles into the furnace through the hopper, and igniting the biomass particles through the electronic igniter, the blower blows air into the furnace to speed up the flow of air in the furnace, so that the biomass particles are fully burned without sparks and smoke, and the efficiency is high. At the same time, in the absence of smoke purification filtering equipment, the air will be discharged through the outlet pipe.

[0017] 3. Fully automatic control through the control box, saving manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a biomass dryer with uniform heating according to an embodiment of the present application.

[0019] Figure 2 It is a front view 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.

[0020] Figure 3 It is a top view of the front end of a drying box of a biomass dryer with uniform heating according to an embodiment of the present application.

[0021] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0022] Figure 5 It is a cross-sectional view of a drying box of a biomass dryer with uniform heating according to an embodiment of the present application.

[0023] Figure 6 It is a structural schematic diagram of a combustion furnace (without a top) of a biomass dryer with uniform heating according to an embodiment of the present application.

[0024] Figure 7 It is a cross-sectional view of a feeding hopper of a biomass dryer with uniform heating according to an embodiment of the present application.

[0025] Figure 8 It is a schematic diagram of the rotation of a rectangular material control bin of a biomass dryer with uniform heating according to an embodiment of the present application.

[0026] Fig. 9 It 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.

[0027] Fig.10 It is a system schematic diagram of a biomass dryer with uniform heating according to an embodiment of the present application.

[0028] Description 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 slide groove; 107, lower slide groove; 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 driving 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 sliding groove; 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

[0029] The following is combined with Figure 1-10 This application is described in further detail.

[0030] The embodiment of the present application discloses a biomass dryer with uniform heating.

[0031] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6A biomass dryer with uniform heating includes a drying box 10, a combustion furnace 20, a charging 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.

[0032] The drying box 10 includes a hot air chamber 101, a drying chamber 102 and an induced draft chamber 103, wherein 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, and the combustion furnace 20 includes a furnace body 201 and two groups of heat dissipation pipes 202 fixedly installed on the furnace body 201, wherein one group of heat dissipation pipes 202 includes 12 heat dissipation pipes 202, and the bottom end of the furnace body 201 is fixedly connected to the bottom end of the drying box 10. The feeding hopper 30 is fixedly installed on the outer wall of the drying box 10, and the feeding hopper 30 is connected to the combustion furnace 20 through a feeding pipe 301, and the feeding hopper 30 is used to add biomass particles into the combustion furnace 20, and an electronic igniter 302 is fixedly installed on the feeding pipe 301, and the electronic igniter 302 is used to ignite the biomass particles. 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. The blower 40 and the 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 end of the combustion furnace 20. It should be noted that the bottom end of the inner part of the hopper 30 is inclined toward the direction of the feeding pipe 301, so as to facilitate the flow of biomass particles into the feeding pipe 301.

[0033] The staff adds the biomass particles into the furnace body 201 through the feeding hopper 30, and ignites the biomass particles through the electronic igniter 302. The blower 40 blows air into the furnace body 201 to speed up the flow of air in the furnace body 201, so that the biomass particles are fully burned without sparks and smoke, and the efficiency is high. At the same time, in the absence of smoke purification filtering equipment, the air will be discharged through the outlet pipe 50.

[0034] The rotating disk 60 is located in the drying chamber 102 and is connected to the drying box 10 through the first driving motor 601. The first driving motor 601 is vertically fixedly installed at the bottom of the drying box 10. The rotating disk 60 is fixedly installed at the top of the first driving motor 601. The rotating disk 60 is used to place the target dried object. One end of the air inlet pipe 70 is located outside the drying box 10, and the other end is located in the induced draft chamber 103 and faces the combustion furnace 20. The air inlet pipe 70 is used to draw air into the induced draft chamber 103, and the air becomes 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 to the hot air chamber 101 through the induced draft duct 801. The induced draft duct 801 is fixedly installed at the top of the drying box 10. One end of the induced draft duct 801 is located in the induced draft chamber 103, and the other end is 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. A plurality of circulating fans 901 are fixedly installed on the fan wall 90, and the circulating fans 901 blow air toward the target drying object. One end of the dehumidification pipe 100 is located outside the drying box 10, and the other end passes through the induced air duct 801 and is located in the drying chamber 102. A dehumidification fan 1001 is fixedly installed at one end of the dehumidification pipe 100 located in the drying chamber 102, and the dehumidification fan 1001 is used to quickly and effectively discharge moisture in the drying box 10 to maintain a suitable humidity environment.

[0035] 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 attracted to the hot air chamber 101 through the induced draft duct 801 by the induced draft function of 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, so as to achieve the recycling of hot air.

[0036] In order to facilitate placing the target dried object on the rotating disk 60, a connection hole 108 is provided at the front end of the drying box 10, a first groove 104 and a second groove 105 are provided on the hole wall on the opposite side of the connection hole 108, an upper slide groove 106 is provided at the top hole wall of the connection hole 108, and a lower slide groove 107 is provided at the bottom hole wall of the connection hole 108. A sliding door 110 is provided on the drying box 10, 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. A through hole 109 is provided at the front end of the drying box 10, and the through hole 109 is connected to 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, and a limiting block 1103 is fixedly installed at one end of the limiting spring 1102 away from the bottom of the limiting groove 1101. One end of the limiting block 1103 which is away from the limiting spring 1102 is in the shape of an inclined surface facing the sliding direction of the sliding door 110 .

[0037] 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 apply a pressure to 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 in the direction of the second groove 105. The sliding door 110 is movable. Since the end of the limit block 1103 that is away from the limit spring 1102 is in an inclined shape, the hole wall of the connecting hole 108 will apply a pressure to the limit block 1103 toward the inside of the limit groove 1101, causing the limit block 1103 to slide into the limit groove 1101 and compress the limit spring 1102, and then the sliding door 110 slides into the second groove 105. When the limit groove 1101 corresponds to the through hole 109, the limit spring 1102 is reset, the limit block 1103 slides out of the limit groove 1101, and clamps at the through hole 109. It should be noted that a small wind force will not cause the sliding door 110 to slide. It should also be noted that during the drying process of the target drying object, the hot air inside the drying box 10 will not flow out through the gap between the sliding door 110 and the drying box 10.

[0038] Reference Figure 7 , Figure 8 and Fig. 9In order to control the amount of biomass particles, 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 through a second driving motor 1201, and the top of the rectangular control bin 120 is open. A right-angled trapezoidal block 130 is fixedly installed 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 side of the right-angled trapezoidal block 130 is fixedly connected to the feeding hopper 30, and the short side of the right-angled trapezoidal block 130 faces each other. The right-angled side of the right-angled trapezoidal block 130 faces the bottom of the inside 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 right-angled side of the right-angled trapezoidal block 130 near the short side of the right-angled trapezoidal block 130, and the arc chamfer 1301 abuts against the top edge of the rectangular control bin 120. The short side of the right-angled trapezoidal block 130 is provided with a receiving groove 1302, and a baffle 1304 is installed in the receiving groove 1302 through an electric telescopic shaft 1303, and the end of the baffle 1304 away from the electric telescopic shaft 1303 is in an upward inclined shape. A pressure sensor 1204 is fixedly installed at the bottom end of the rectangular material control bin 120, and an auxiliary chute 1202 is vertically opened relative to the inside of the rectangular material control bin 120, and a support plate 1203 is installed at the auxiliary chute 1202, and the bottom end of the support plate 1203 is in contact with the top end of the pressure sensor 1204. It should be noted that the front end of the rectangular material control bin 120 is square.

[0039] The staff introduces the biomass particles into the hopper 30, and the biomass particles will fall into the rectangular control bin 120 through the two relative baffles 1304. Since the distance between the two relative baffles 1304 can be adjusted by the electric telescopic shaft 1303, the flow rate of the biomass particles falling into the rectangular control bin 120 can be controlled. The pressure sensor 1204 weighs the biomass particles in the rectangular control bin 120. When the required amount is reached, the two relative baffles 1304 are quickly closed under the action of the electric telescopic shaft 1303, and then the second drive motor 1201 drives the rectangular control bin 120 to rotate, so that the biomass particles in the rectangular control bin 120 slide into the combustion furnace 20 through the feeding pipe 301. It should be noted that, since biomass particles will still fall into the rectangular empty bin during the closing process of the two relative baffles 1304, the actual weight of the biomass particles is 0.1kg to 0.3kg more than the required amount, which can be ignored due to the small error.

[0040] Reference Figure 7 A screen 140 is fixedly installed horizontally in the hopper 30, and the screen 140 is located above the right-angle trapezoidal block 130. The screen 140 can filter the large particle impurities contained in the biomass particles, and at the same time, the screen 140 can also reduce the speed at which the biomass particles fall.

[0041] Reference Figure 1 , Figure 5, Figure 7 , Fig. 9 and Fig.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 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 dehumidification fan 1001, the second drive motor 1201, the electric telescopic shaft 1303 and the pressure sensor 1204 through a PLC controller. It should be noted that the control box 180 has a display screen.

[0042] The temperature sensor 150 is used to detect the temperature in the drying box 10 and output a temperature detection signal; the humidity sensor 160 is used to detect the humidity in the drying box 10 and output a humidity detection signal; the wind speed sensor 170 is used to detect the wind speed in the drying box 10 and output a wind speed detection signal. The PLC controller is used to receive the temperature detection signal, the humidity detection signal and the wind speed detection signal, and upload the values ​​reflected by the temperature detection signal, the humidity detection signal and the wind speed detection signal to the control box 180, which is displayed on the display screen of the control box 180.

[0043] The control box 180 also controls 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 through the PLC controller. At the same time, the control box 180 also controls the wind speed of the blower 40, the wind speed of the induced draft fan 80, the wind speed of the circulation fan 901, and the wind speed of the dehumidification fan 1001 through the PLC controller.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope 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 mounted 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 which is located outside the drying box (10), and the other end of which is located in the induced draft chamber (103) and faces the combustion furnace (20); An induced draft fan (80), wherein 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) being located between the hot air chamber (101) and the drying chamber (102), and being fixedly connected to the drying box (10), and having a plurality of circulating fans (901) fixedly mounted on the fan wall (90), the circulating fans (901) blowing air towards target drying objects; 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), one group of heat dissipation pipes (202) comprising 12 heat dissipation pipes (202), and 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), the through hole (109) being in communication with the second groove (105), a limiting groove (1101) corresponding to the through hole (109) is provided on the sliding door (110), a limiting spring (1102) is fixedly installed in the limiting groove (1101), and 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: One 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 driving motor (1201). The top of the rectangular material control bin (120) is open. A right-angled trapezoidal block (130) is fixedly mounted 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 of the inside 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-angle 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), wherein the bottom end of the support plate (1203) abuts 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-angle 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 dehumidification 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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