Biomass briquette boiling granulator dryer

Abstract

The present application relates to the technical field of biomass briquette production, and discloses a biomass briquette boiling granulation dryer, which comprises a bottom cylinder, a dryer is installed at the top end of the bottom cylinder, an air filtering and heating assembly is installed on one side of the bottom cylinder, an air induction channel is installed at the top end of one side of the dryer, an air induction fan is installed at one end of the air induction channel, a smoke exhaust pipe is installed on the air induction channel, and a silencer is installed on the smoke exhaust pipe. The boiling granulation dryer can drive the rack to move through the first motor, and then drive the two air inlet discs to rotate, so that the area ratio of the air inlet openings of the two air inlet discs changes, the amount of cold and hot air entering the air temperature adjusting pipe changes, the heat of the entering air is adjusted conveniently, and granulation drying is conveniently performed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of biomass briquette production, and particularly relates to a biomass briquette boiling granulation dryer. BACKGROUND

[0002] At present, the boiling drying granulator is commonly used in the product granulation process in the pharmaceutical, food, chemical, pesticide, feed, fuel and other industries, and its working process is that the powdery material is first suspended in a fluidized state and circulated, while spraying mist adhesive into the powder in the container to make the powder condense into loose small particles, and at the same time, the hot air flow is used for high-efficiency drying to make the water continuously evaporate and the powder continuously condense to form uniform spherical particles.

[0003] The prior art discloses a granulation dryer, which comprises an air inlet system, a bottom cylinder, a dryer, an air duct, an air blower and an exhaust pipe, the air inlet system comprises a primary and medium efficiency filter, a high efficiency filter and an upper air inlet channel and a lower air inlet channel arranged between the primary and medium efficiency filter and the high efficiency filter, an electric heater and an air door are arranged in the lower air inlet channel, the air door is arranged between the electric heater and the high efficiency filter, and an explosion-proof device is arranged on the air duct; the device can realize granulation of materials.

[0004] However, in the air inlet process, the electric heater heats the entering air after being powered on, and then the heated air is sent into the dryer for work, and in the drying process, the granulation temperature is different when different raw materials are granulated, the temperature of the dryer is the same as that of the hot air, and the temperature of the air is not easy to heat when the electric heater heats the air, thereby affecting the granulation effect. SUMMARY

[0005] In view of the above problems, the present application provides a biomass briquette boiling granulation dryer to effectively solve the problem that the granulation temperature is different when different raw materials are granulated, the hot air temperature is not easy to adjust, and the granulation effect is affected.

[0006] To achieve the above object, the present application provides the following technical scheme:

[0007] A biomass briquette boiling granulation dryer comprises a bottom cylinder, an air filtration and heating assembly is arranged on one side of the bottom cylinder, an air inlet channel is arranged on one side of the top end of the dryer, an air blower is arranged on one end of the air inlet channel, an exhaust pipe is arranged on the air inlet channel, and a silencer is arranged on the exhaust pipe.

[0008] The air filtering and heating assembly comprises a body, a base mounted at the bottom end of the body, an external communication pipeline mounted at the side of the body close to the bottom cylinder, a high-level filter mounted at the side of the external communication pipeline close to the bottom cylinder, a primary filter mounted at the side of the body far from the bottom cylinder, an air inlet fan mounted in the internal of the external communication pipeline, and the air inlet fan is located at the side of the high-level filter far from the bottom cylinder.

[0009] Preferably, an air temperature adjusting tube is mounted in the internal of the body, support legs are symmetrically mounted at the bottom end of the air temperature adjusting tube, the support legs are fixedly connected with the internal bottom wall of the body, an internal connection pipeline is mounted at the end of the high-level filter close to the body, the internal wall of the internal connection pipeline is close to the external wall of the air temperature adjusting tube, and an air temperature adjusting unit is mounted on the air temperature adjusting tube.

[0010] Preferably, the air temperature adjusting unit comprises a hot air inlet pipe mounted at one side of the air temperature adjusting tube and a cold air inlet pipe mounted at the other side of the air temperature adjusting tube, a rotating groove is formed in the internal of the hot air inlet pipe and the cold air inlet pipe, an air inlet disc is rotatably mounted in the internal of the rotating groove, a communication groove is formed at the side of the rotating groove close to the air temperature adjusting tube, a hot air inlet groove is formed at the side of the hot air inlet pipe close to the air temperature adjusting tube, the hot air inlet groove is in communication with the internal of the air temperature adjusting tube, a heating coil is mounted in the internal of the hot air inlet groove, a cold air inlet groove is formed at the side of the cold air inlet pipe close to the air temperature adjusting tube, and the cold air inlet groove is not in communication with the internal of the air temperature adjusting tube.

[0011] Preferably, a spiral groove is formed in the internal of the air temperature adjusting tube, the spiral groove is spirally formed in the internal of the air temperature adjusting tube, one end of the spiral groove is in communication with the cold air inlet groove, the other end of the spiral groove is provided with an air outlet groove, the air outlet groove penetrates to the side of the air temperature adjusting tube close to the bottom cylinder, and a cold and hot air mixing unit is mounted at one end of the air outlet groove.

[0012] Preferably, an air inlet is formed at one side of the air inlet disc, air inlet holes are uniformly formed at the side of the air inlet disc far from the air inlet, the air inlet disc in the internal of the hot air inlet pipe is arranged at a ninety-degree angle with the air inlet disc in the internal of the cold air inlet pipe, and a temperature adjusting driving unit is mounted at the top end of the air inlet disc.

[0013] Preferably, the temperature adjusting driving unit comprises a rotating rod mounted at the top end of the air inlet disc, a gear is mounted at the top end of the rotating rod, a rack is arranged above the air temperature adjusting tube, the rack is engaged with the two gears, a fixing frame is mounted at the top end of the air temperature adjusting tube, a sliding groove is formed in the internal of the fixing frame, a sliding block is mounted at the side of the rack close to the fixing frame, the sliding block is slidably connected with the sliding groove, a screw rod is rotatably connected at the end of the sliding groove, the screw rod is threadedly connected with the sliding block, one end of the screw rod is fixedly connected with the output shaft of a first motor, the first motor is fixedly mounted on the fixing frame, and a screw rod brake stop unit is mounted at the top end of the sliding block.

[0014] Preferably, the screw brake stopping unit includes a guide groove formed at the top of the slide groove, the guide groove extending to the top of the fixed frame, a guide block installed at the top of the slider, the guide block being slidably installed inside the guide groove, a movable groove formed inside the guide block, a movable block being movably installed inside the movable groove, a top rod installed at the top of the movable block, a locking rod installed at the top of the top rod, and a first spring installed at the bottom of the movable block, the bottom of the first spring being fixedly connected to the inner bottom wall of the movable groove.

[0015] Preferably, a horizontal plate is installed at the top of the fixing frame, and grooves are equally spaced at the top of the horizontal plate, with the locking rod matching the grooves.

[0016] Preferably, the hot and cold air mixing unit includes a guide pipe installed at one end of the air outlet slot. The guide pipe is configured in a horizontal U-shape and is located on the side of the air temperature regulating pipe near the bottom cylinder. An end block is installed at one end of the guide pipe, and a middle pipe is installed on one side of the end block. The middle pipe is located inside the air temperature regulating pipe. One end of the middle pipe is fixedly connected to a rotating shaft, and one end of the rotating shaft is fixedly connected to the output shaft of a second motor. The second motor is fixedly installed on the air temperature regulating pipe. Stirring blades are installed at equal angles on the outer wall of the middle pipe. Side holes are evenly opened on the outer wall of the middle pipe. A stop block is movably installed inside the side hole. A ventilation groove is opened inside the stop block and is connected to the inside of the middle pipe. Ventilation holes are evenly opened on the outer wall of the ventilation groove. A limit plate is installed at the end of the stop block away from the middle pipe. A second spring is installed on the side of the limit plate near the middle pipe, and one end of the second spring is fixedly connected to the outer wall of the middle pipe.

[0017] Preferably, a limiting groove is formed on the side of the end block near the middle tube, and a limiting ring is installed on the side of the middle tube near the end block, with the limiting ring rotatably connected to the inside of the limiting groove.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1) This invention uses two air intake discs set at a 90-degree angle to change the ratio of the air inlet leakage areas of the two air intake discs, thereby changing the amount of hot and cold air entering the air temperature regulating pipe, thus facilitating the adjustment of the heat of the incoming air and facilitating pelleting and drying. At the same time, after the two air intake discs rotate, the air inlet of one air intake disc rotates towards the inside of the rotating groove, while the air inlet of the other air intake disc rotates towards the outside of the rotating groove. That is, the air intake area on one side decreases, and the air intake area on the other side increases by the same amount, thereby changing the ratio of the air intake on both sides. After the air on one side is heated, two types of air are generated, one hot and one cold. The ratio of the hot and cold air is changed by the air intake discs on both sides. After the hot and cold air meet, heat is transferred. By changing the ratio of the hot and cold air, the temperature of the air after the hot and cold air are mixed is changed, thereby changing the drying temperature and facilitating the pelleting and drying of biomass briquettes.

[0020] 2) Hot air enters the air temperature regulating pipe directly through the hot air inlet slot, while cold air needs to pass through the spiral tube slot. Since the spiral tube slot is arranged in a spiral shape and closely arranged on the outside of the inner cavity of the air temperature regulating pipe, it facilitates the heat transfer between hot air and cold air, facilitates the temperature neutralization between hot air and cold air, and facilitates the temperature regulation of the air.

[0021] 3) After the cold air enters the middle tube, it enters the air temperature regulating tube through the baffle, causing the cold air to diffuse outward from the middle of the hot air, so that the cold and hot air come into contact, thus facilitating the regulation of air temperature. At the same time, when it is turned on, the rotation of the middle tube drives the stirring blade to rotate, mixing the cold and hot air entering the air temperature regulating tube, thus facilitating the regulation of air temperature. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0023] In the attached diagram:

[0024] Figure 1 This is a schematic diagram of the structure of the biomass pellet fuel fluidized bed dryer of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the machine body in this invention;

[0026] Figure 3 This is a schematic diagram of the air filter heating assembly in this invention;

[0027] Figure 4 This is a schematic diagram of the air temperature regulating unit in this invention;

[0028] Figure 5This is a schematic diagram of the temperature regulation drive unit in this invention;

[0029] Figure 6 This is a schematic diagram of the screw brake stopping unit in this invention;

[0030] Figure 7 This is a schematic diagram of the air temperature regulating pipe in this invention;

[0031] Figure 8 This is a schematic diagram of the structure of the hot and cold air mixing unit in this invention;

[0032] In the diagram: 1. Base cylinder; 2. Dryer; 3. Air filter and heating assembly; 301. Body; 302. Base; 303. Primary filter; 304. External connecting pipe; 305. Advanced filter; 306. Intake fan; 307. Internal connecting pipe; 308. Air temperature regulating pipe; 309. Support leg; 310. Air temperature regulating unit; 3101. Hot air inlet pipe; 3102. Cold air inlet pipe; 3 103. Rotary slot; 3104. Air inlet plate; 3105. Hot air inlet slot; 3106. Cold air inlet slot; 3107. Connecting slot; 3108. Heating coil; 3109. Spiral tube slot; 31010. Air inlet; 31011. Air inlet hole; 31012. Air outlet slot; 311. Temperature regulation drive unit; 3111. Rotating rod; 3112. Gear; 3113. Rack; 3114. Fixing bracket; 31 15. Slide groove; 3116. Slider; 3117. Screw; 3118. First motor; 312. Screw brake stop unit; 3121. Guide groove; 3122. Guide block; 3123. Horizontal plate; 3124. Groove; 3125. Movable groove; 3126. Movable block; 3127. Push rod; 3128. Locking rod; 3129. First spring; 313. Hot and cold air mixing unit; 3131. Guide pipe; 3 132. End block; 3133. Limiting rotating groove; 3134. Middle tube; 3135. Limiting rotating ring; 3136. Stirring blade; 3137. Rotating shaft; 3138. Second motor; 3139. Side hole; 31310. Stop block; 31311. Ventilation groove; 31312. Ventilation hole; 31313. Limiting plate; 31314. Second spring; 4. Air intake channel; 5. Exhaust fan; 6. Silencer; 7. Smoke exhaust pipe. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0034] Depend on Figures 1-3 As shown, the biomass briquette fuel fluidized bed dryer of the present invention includes a bottom cylinder 1, a dryer 2 installed at the top of the bottom cylinder 1, an air filter heating assembly 3 installed on one side of the bottom cylinder 1, an air duct 4 installed at the top of one side of the dryer 2, an air blower 5 installed at one end of the air duct 4, an exhaust pipe 7 installed on the air duct 4, and a silencer 6 installed on the exhaust pipe 7.

[0035] The air filter heating assembly 3 includes a body 301, a base 302 installed at the bottom of the body 301, an external connecting pipe 304 installed on the side of the body 301 near the bottom cylinder 1, an advanced filter 305 installed on the side of the external connecting pipe 304 near the bottom cylinder 1, a primary filter 303 installed on the side of the body 301 away from the bottom cylinder 1, an intake fan 306 installed inside the external connecting pipe 304, the intake fan 306 being located on the side of the advanced filter 305 away from the bottom cylinder 1, and an air temperature regulating pipe 308 installed inside the body 301.

[0036] During operation, the intake fan 306 is activated to draw outside air through the primary filter 303 into the machine body 301 for heating. The heated air is then filtered again through the advanced filter 305 before entering the dryer 2, thereby removing impurities and dust from the hot air to ensure product quality. The hot air enters the bottom cylinder 1 at high speed, blowing the material inside the bottom cylinder 1 into the dryer 2 for drying and evaporation. The exhaust gas is discharged to the outside through the induced draft channel 4, the induced draft fan 5, and the exhaust pipe 7. There is no dust flying, the cleaning is thorough, and there is no cross-contamination. It is a new type of structure that integrates mixing, granulation, and drying.

[0037] After the air supply system stops supplying air, the dried material falls back into the bottom cylinder 1. Then, the bottom cylinder 1 can be replaced to resume operation, which improves work efficiency. After the material is dried, in order to lower its temperature, the damper in the lower air inlet channel can be closed, and cold air can be introduced through the upper air inlet channel to cool the material in the bottom cylinder 1. The structure is simple and the operation is convenient.

[0038] See Figures 3 to 5 The present invention also has symmetrical support legs 309 installed at the bottom end of the air temperature regulating pipe 308. The support legs 309 are fixedly connected to the inner bottom wall of the body 301. An internal connecting pipe 307 is installed at the end of the advanced filter 305 near the body 301. The inner wall of the internal connecting pipe 307 is in close contact with the outer wall of the air temperature regulating pipe 308. An air temperature regulating unit 310 is installed on the air temperature regulating pipe 308.

[0039] In some embodiments, see Figures 5 to 8The aforementioned air temperature regulating unit 310 includes a hot air inlet pipe 3101 installed on one side of the air temperature regulating pipe 308 and a cold air inlet pipe 3102 installed on the other side of the air temperature regulating pipe 308. Both the hot air inlet pipe 3101 and the cold air inlet pipe 3102 have a rotating groove 3103 inside. An air inlet disc 3104 is rotatably installed inside the rotating groove 3103. A connecting groove 3107 is provided on the side of the rotating groove 3103 near the air temperature regulating pipe 308. A hot air inlet groove 3105 is provided on the side of the hot air inlet pipe 3101 near the air temperature regulating pipe 308. The hot air inlet groove 3105 is connected to the inside of the air temperature regulating pipe 308.

[0040] In order to regulate the air temperature, a heating coil 3108 may be installed inside the hot air inlet slot 3105; at the same time, a cold air inlet slot 3106 is provided on the side of the cold air inlet pipe 3102 near the air temperature regulating pipe 308; it should be noted that the cold air inlet slot 3106 is not connected to the inside of the air temperature regulating pipe 308.

[0041] Furthermore, the present invention provides a spiral groove 3109 inside the air temperature regulating tube 308. The spiral groove 3109 is spirally formed inside the air temperature regulating tube 308. One end of the spiral groove 3109 is connected to the cold air inlet groove 3106, and the other end of the spiral groove 3109 is provided with an air outlet groove 31012. Hot air enters the air temperature regulating tube 308 directly through the hot air inlet groove 3105, while cold air needs to pass through the spiral groove 3109.

[0042] Because the spiral grooves 3109 are arranged in a spiral shape and closely arranged on the outer side of the inner cavity of the air temperature regulating tube 308, it facilitates the heat transfer between hot air and cold air, facilitates the temperature neutralization between hot air and cold air, and facilitates the temperature regulation of the air.

[0043] The air outlet groove 31012 extends to the side of the air temperature regulating pipe 308 near the bottom cylinder 1. A hot and cold air mixing unit 313 is installed at one end of the air outlet groove 31012. An air inlet 31010 is opened on one side of the air inlet plate 3104, and air inlet holes 31011 are evenly opened on the side of the air inlet plate 3104 away from the air inlet 31010.

[0044] It should be noted that, optionally, the air intake plate 3104 inside the hot air inlet pipe 3101 is set at a 90-degree angle to the air intake plate 3104 inside the cold air inlet pipe 3102.

[0045] When the two air intake discs 3104 rotate simultaneously, the air inlet 31010 of one air intake disc 3104 rotates towards the inside of the rotating groove 3103, while the air inlet 31010 of the other air intake disc 3104 rotates towards the outside of the rotating groove 3103. That is, the air intake area on one side decreases and the air intake area on the other side increases, thereby changing the ratio of air intake on both sides. After the air on one side is heated, two types of air, one hot and one cold, are generated. The ratio of hot and cold air is changed through the air intake discs 3104 on both sides. Heat is transferred after the hot and cold air meet. By changing the ratio of hot and cold air, the temperature of the air after the hot and cold air are mixed is changed, thereby changing the drying temperature and facilitating granulation drying.

[0046] In use, the first motor 3118 is turned on, causing the rack 3113 to move, which in turn drives the two air intake discs 3104 to rotate. The two air intake discs 3104 are set at a 90-degree angle, which changes the ratio of the leakage area of ​​the air intake ports 31010 of the two air intake discs 3104, thereby changing the amount of hot and cold air entering the air temperature regulating pipe 308, thus facilitating the adjustment of the heat of the incoming air and facilitating granulation and drying.

[0047] In some other embodiments, the present invention mounts a temperature regulating drive unit 311 on the top of the intake disc 3104; the temperature regulating drive unit 311 includes a rotating rod 3111 mounted on the top of the intake disc 3104, a gear 3112 mounted on the top of the rotating rod 3111, a rack 3113 above the air temperature regulating pipe 308, the rack 3113 meshing with both gears 3112, and a fixing bracket 3114 mounted on the top of the air temperature regulating pipe 308, the fixing bracket 3114 having an internal... A slide groove 3115 is provided. A slider 3116 is installed on the side of the rack 3113 near the fixed frame 3114. The slider 3116 is slidably connected to the slide groove 3115. A screw 3117 is rotatably connected to the end of the slide groove 3115. The screw 3117 is threadedly connected to the slider 3116. One end of the screw 3117 is fixedly connected to the output shaft of the first motor 3118. The first motor 3118 is fixedly installed on the fixed frame 3114. A screw brake stop unit 312 is installed on the top of the slider 3116.

[0048] The screw brake stopping unit 312 includes a guide groove 3121 formed at the top of the slide groove 3115, extending through to the top of the fixed frame 3114. A guide block 3122 is mounted on the top of the slider 3116, and the guide block 3122 is slidably mounted inside the guide groove 3121. A movable groove 3125 is formed inside the guide block 3122, and a movable block 3126 is movably mounted inside the movable groove 3125. A push rod 3127 is mounted on the top of the movable block 3126, and a locking rod 3128 is mounted on the top of the push rod 3127. A first spring 3129 is mounted on the bottom of the movable block 3126, and the bottom of the first spring 3129 is connected to the movable groove 3121. The inner bottom wall of the 5 is fixedly connected, and a horizontal plate 3123 is installed on the top of the fixed frame 3114. The top of the horizontal plate 3123 is provided with grooves 3124 at equal intervals. The locking rod 3128 is adapted to the grooves 3124. During the movement of the slider 3116, the locking rod 3128 at the top of the slider 3116 is easily trapped in the grooves 3124 at the top of the horizontal plate 3123 under the elastic force of the first spring 3129, which generates resistance to the movement of the slider 3116. This prevents the output shaft of the first motor 3118 from driving the screw 3117 to continue rotating when the first motor 3118 stops, thereby improving the rotational stability of the air intake plate 3104 and improving the temperature regulation effect.

[0049] The hot and cold air mixing unit 313 includes a guide pipe 3131 installed at one end of the air outlet slot 31012. The guide pipe 3131 is configured in a horizontal U-shape and is located on the side of the air temperature regulating pipe 308 near the bottom cylinder 1. An end block 3132 is installed at one end of the guide pipe 3131, and a middle pipe 3134 is installed on one side of the end block 3132. The middle pipe 3134 is located inside the air temperature regulating pipe 308, and one end of the middle pipe 3134 is fixedly connected to a rotating shaft 3137. One end of 37 is fixedly connected to the output shaft of the second motor 3138. The second motor 3138 is fixedly mounted on the air temperature regulating pipe 308. Stirring blades 3136 are installed at equal angles on the outer wall of the middle pipe 3134. Side holes 3139 are evenly distributed on the outer wall of the middle pipe 3134. A stop block 31310 is movably installed inside the side hole 3139. A ventilation groove 31311 is formed inside the stop block 31310. The ventilation groove 31311 communicates with the inside of the middle pipe 3134. Ventilation holes 31312 are evenly distributed on the outer wall. A limit plate 31313 is installed on the end of the stop block 31310 away from the middle tube 3134. A second spring 31314 is installed on the side of the limit plate 31313 near the middle tube 3134. One end of the second spring 31314 is fixedly connected to the outer wall of the middle tube 3134. A limit groove 3133 is opened on the side of the end block 3132 near the middle tube 3134. A limit ring 3135 is installed on the side of the middle tube 3134 near the end block 3132. The limiting rotating ring 3135 is rotatably connected to the inside of the limiting rotating groove 3133. After the cold air enters the inside of the middle pipe 3134, it enters the air temperature regulating pipe 308 from the baffle 31310, so that the cold air diffuses outward from the middle of the hot air, and the cold and hot air come into contact, thus facilitating the regulation of air temperature. At the same time, after 3188 is turned on, the rotation of the middle pipe 3134 drives the stirring blade 3136 to rotate, mixing the cold and hot air entering the air temperature regulating pipe 308, thus facilitating the regulation of air temperature.

[0050] When temperature adjustment is required, the first motor 3118 is turned on, causing the screw 3117 to rotate. Since the screw 3117 is threadedly connected to the slider 3116, it drives the slider 3116 to rotate, which in turn drives the rack 3113 to move. Since the rack 3113 meshes with the gears 3112 on both sides, it drives the two air intake discs 3104 to rotate. Since the two air intake discs 3104 are set at a 90-degree angle, the ratio of the leakage area of ​​the air intake ports 31010 of the two air intake discs 3104 changes, thereby changing the amount of hot and cold air entering the air temperature regulating pipe 308. The hot and cold air mix inside the air temperature regulating pipe 308 and change the air temperature, thus facilitating the adjustment of the heat of the incoming air and facilitating the pelleting and drying of biomass briquettes.

[0051] During the process of air temperature regulation, a portion of the air enters the air temperature regulating pipe 308 from the hot air inlet pipe 3101. When the air passes through the hot air inlet slot 3105, it is heated by the heating coil 3108. Another portion of the air passes through the cold air inlet pipe 3102, through the spiral slot 3109 and the guide pipe 3131, and enters the middle pipe 3134. Since the spiral slot 3109 is arranged in a spiral shape and closely arranged to the outer side of the inner cavity of the air temperature regulating pipe 308, it facilitates the heat transfer between hot air and cold air, facilitates the temperature neutralization of hot air and cold air, and facilitates the temperature regulation of the air.

[0052] Furthermore, after cold air enters the middle tube 3134, the internal air pressure of the middle tube 3134 increases, pushing each baffle 31310 to move outward, thereby connecting the ventilation slot 31311 with the air temperature regulating tube 308, allowing cold air to enter the air temperature regulating tube 308. This allows the cold air to mix with the hot air from the middle, facilitating contact between the cold and hot air and thus facilitating air temperature regulation. At the same time, the second motor 3138 is activated, causing the middle tube 3134 to rotate, which in turn drives the stirring blade 3136 to rotate, mixing the cold and hot air entering the air temperature regulating tube 308, thereby facilitating air temperature regulation.

[0053] During the movement of slider 3116, the locking rod 3128 at the top of slider 3116 is easily trapped in the groove 3124 at the top of horizontal plate 3123 under the elastic force of the first spring 3129, thus generating resistance to the movement of slider 3116. This prevents the output shaft of the first motor 3118 from continuing to rotate due to rotational inertia when the first motor 3118 stops, thus facilitating the timely stopping of slider 3116, thereby improving the rotational stability of air intake plate 3104 and improving the temperature regulation effect.

[0054] It should be noted that, although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fluidized bed pellet dryer for biomass briquettes, comprising a bottom cylinder (1), characterized in that: A dryer (2) is installed at the top of the bottom cylinder (1), an air filter heating assembly (3) is installed on one side of the bottom cylinder (1), an air duct (4) is installed at the top of one side of the dryer (2), an air duct (5) is installed at one end of the air duct (4), an exhaust pipe (7) is installed on the air duct (4), and a silencer (6) is installed on the exhaust pipe (7). The air filter heating assembly (3) includes a body (301), a base (302) is installed at the bottom of the body (301), an external connecting pipe (304) is installed on the side of the body (301) near the bottom cylinder (1), an advanced filter (305) is installed on the side of the external connecting pipe (304) near the bottom cylinder (1), a primary filter (303) is installed on the side of the body (301) away from the bottom cylinder (1), and an intake fan (306) is installed inside the external connecting pipe (304), the intake fan (306) is located on the side of the advanced filter (305) away from the bottom cylinder (1); An air temperature regulating pipe (308) is installed inside the body (301), and an air temperature regulating unit (310) is installed on the air temperature regulating pipe (308); The air temperature regulating unit (310) includes a hot air inlet pipe (3101) installed on one side of the air temperature regulating pipe (308) and a cold air inlet pipe (3102) installed on the other side of the air temperature regulating pipe (308). Rotary grooves (3103) are provided inside both the hot air inlet pipe (3101) and the cold air inlet pipe (3102). An air intake disc (3104) is rotatably mounted inside the rotary groove (3103). A connecting groove (3107) is provided on the side of the rotary groove (3103) closest to the air temperature regulating pipe (308). The hot air inlet pipe (3101) is located near... A hot air inlet slot (3105) is provided on one side near the air temperature regulating pipe (308). The hot air inlet slot (3105) is connected to the inside of the air temperature regulating pipe (308). A heating coil (3108) is installed inside the hot air inlet slot (3105). A cold air inlet slot (3106) is provided on the side of the cold air inlet pipe (3102) near the air temperature regulating pipe (308). The cold air inlet slot (3106) is not connected to the inside of the air temperature regulating pipe (308). A temperature regulating drive unit (311) is installed at the top of the air inlet plate (3104). The air temperature regulating pipe (308) has a spiral groove (3109) inside. The spiral groove (3109) is spirally opened inside the air temperature regulating pipe (308). One end of the spiral groove (3109) is connected to the cold air inlet groove (3106). The other end of the spiral groove (3109) has an outlet groove (31012). The outlet groove (31012) extends to the side of the air temperature regulating pipe (308) near the bottom cylinder (1). A hot and cold air mixing unit (313) is installed at one end of the outlet groove (31012). The temperature regulation drive unit (311) includes a rotating rod (3111) mounted on the top of the air intake plate (3104). A gear (3112) is mounted on the top of the rotating rod (3111). A rack (3113) is provided above the air temperature regulating pipe (308). The rack (3113) meshes with both gears (3112). A fixing bracket (3114) is mounted on the top of the air temperature regulating pipe (308). A sliding groove (3115) is provided inside the fixing bracket (3114). The rack (3113) is close to the fixing bracket. A slider (3116) is installed on one side of the fixed frame (3114). The slider (3116) is slidably connected to the slide groove (3115). A screw (3117) is rotatably connected to the end of the slide groove (3115). The screw (3117) is threadedly connected to the slider (3116). One end of the screw (3117) is fixedly connected to the output shaft of the first motor (3118). The first motor (3118) is fixedly installed on the fixed frame (3114). A screw brake stop unit (312) is installed on the top of the slider (3116). The screw brake stopping unit (312) includes a guide groove (3121) opened at the top of the slide groove (3115), the guide groove (3121) extends through to the top of the fixed frame (3114), a guide block (3122) is installed at the top of the slider (3116), the guide block (3122) is slidably installed inside the guide groove (3121), a movable groove (3125) is opened inside the guide block (3122), a movable block (3126) is movably installed inside the movable groove (3125), a top rod (3127) is installed at the top of the movable block (3126), a locking rod (3128) is installed at the top of the top rod (3127), and a first spring (3129) is installed at the bottom of the movable block (3126), the bottom of the first spring (3129) is fixedly connected to the inner bottom wall of the movable groove (3125).

2. The biomass pellet fuel fluidized bed dryer according to claim 1, characterized in that: Support legs (309) are symmetrically installed at the bottom of the air temperature regulating pipe (308). The support legs (309) are fixedly connected to the inner bottom wall of the body (301). An internal connecting pipe (307) is installed at the end of the high-grade filter (305) near the body (301). The inner wall of the internal connecting pipe (307) is in close contact with the outer wall of the air temperature regulating pipe (308).

3. The biomass pellet fuel fluidized bed dryer according to claim 1, characterized in that: An air inlet (31010) is provided on one side of the air inlet plate (3104), and air inlets (31011) are evenly provided on the side of the air inlet plate (3104) away from the air inlet (31010). The air inlet plate (3104) inside the hot air inlet pipe (3101) and the air inlet plate (3104) inside the cold air inlet pipe (3102) are set at a 90-degree angle.

4. The biomass pellet fuel fluidized bed dryer according to claim 1, characterized in that: The top of the fixing frame (3114) is equipped with a horizontal plate (3123), and the top of the horizontal plate (3123) is provided with grooves (3124) at equal intervals, and the clamping rod (3128) is adapted to the grooves (3124).

5. The biomass pellet fuel fluidized bed dryer according to claim 1, characterized in that: The hot and cold air mixing unit (313) includes a guide pipe (3131) installed at one end of the air outlet slot (31012). The guide pipe (3131) is arranged in a horizontal U-shape and is located on the side of the air temperature regulating pipe (308) near the bottom cylinder (1). An end block (3132) is installed at one end of the guide pipe (3131), and a middle pipe (3134) is installed on one side of the end block (3132). The middle pipe (3134) is located inside the air temperature regulating pipe (308). One end of the middle pipe (3134) is fixedly connected to a rotating shaft (3137), and one end of the rotating shaft (3137) is fixedly connected to the output shaft of a second motor (3138). The second motor (3138) is fixedly installed on the air temperature regulating pipe (308). 4) Stirring blades (3136) are installed at equal angles on the outer wall. Side holes (3139) are evenly opened on the outer wall of the middle tube (3134). A stop block (31310) is movably installed inside the side hole (3139). A ventilation groove (31311) is opened inside the stop block (31310). The ventilation groove (31311) is connected to the inside of the middle tube (3134). Ventilation holes (31312) are evenly opened on the outer wall of the ventilation groove (31311). A limiting plate (31313) is installed at the end of the stop block (31310) away from the middle tube (3134). A second spring (31314) is installed on the side of the limiting plate (31313) close to the middle tube (3134). One end of the second spring (31314) is fixedly connected to the outer wall of the middle tube (3134).

6. The biomass pellet fuel fluidized bed dryer according to claim 5, characterized in that: The end block (3132) has a limiting groove (3133) on the side near the middle tube (3134), and a limiting ring (3135) is installed on the side of the middle tube (3134) near the end block (3132). The limiting ring (3135) is rotatably connected to the inside of the limiting groove (3133).

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