Hot-air circulation hot-melt coating fluidized bed

Abstract

The invention relates to a hot air circulation hot melting coating fluidized bed, which relates to the technical field of coating fluidized beds, and comprises a fluidized bed cavity, a melting tank body, an atomizing heating tank body, a cyclone separator, a dust filtering catcher, a fan and an infusion pump. By arranging the cyclone separator, large-particle materials in airflow are separated and recycled, product loss is reduced, by arranging the dust filtering catcher, fine powder can be further captured, waste gas is ensured to be clean, environmental pollution is avoided, by arranging the draught fan, airflow circulation can be driven, a closed hot air loop is formed, the heat energy utilization rate is increased, and energy conservation and emission reduction are achieved. By arranging the infusion pump, molten coating liquid can be conveyed to the atomization system from the melting tank, continuous feeding is guaranteed, a hot air circulation pipeline can be formed through the exhaust pipe, the separation air outlet pipe, the filtering air inlet pipe, the filtering exhaust pipe, the air inlet pipe, the air exhaust pipe and the air inlet pipe, waste gas reheating utilization can be achieved, and energy consumption is reduced.

Description

Technical Field

[0001] The invention relates to the field of coating fluidized beds, in particular to a hot air circulation hot melt coating fluidized bed. Background Art

[0002] Hot melt coating, also known as melt coating, is a coating technology that has recently gained popularity. It primarily involves spraying a molten material onto a substrate in a fluidized bed, where it cools and solidifies into a film. This solvent-free, highly efficient process leaves no residual solvent. Fluidized beds are commonly used for hot melt coating. Within the fluidized bed, the core particles are entrained by a hot air flow, fluidizing them. The melted hot melt coating material is then sprayed onto the core particles through spray guns at the bottom or side of the fluidized bed, gradually coating them to form a uniform, dense film. The advantages of hot melt coating technology lie in its environmental friendliness and efficiency, significantly reducing the environmental pollution associated with traditional solvent-based coatings. Furthermore, the lack of solvents makes the production process safer and reduces energy consumption and costs. Optimized fluidized bed design further enhances the effectiveness of hot melt coating. By precisely controlling air velocity, temperature distribution, and spray angle, uniform coating of the core particles is achieved, thereby improving product quality and consistency. Furthermore, the hot air circulation system within the fluidized bed effectively promotes heat transfer and material curing, shortening the process cycle and providing reliable support for large-scale industrial applications.

[0003] An existing patent (publication number: CN211434204U) discloses a fluidized bed coating machine, comprising an air inlet duct, an air filter, a heating chamber, a drum, an atomizing system, a feeder, an air outlet duct, an induced draft fan, and a PLC control system. The PLC control system is connected to and controls the operation of the air filter, atomizing system, feeder, and induced draft fan. A coating chamber is located within the drum, and an air flow distribution plate is installed at the input end of the coating chamber, forming an ascending zone, a fluidizing zone, and a descending zone within the coating chamber. The ascending zone is located at the lower end of the coating chamber, the fluidizing zone is located at the upper end, and the descending zone is located around the inner wall of the coating chamber. Air from the air inlet duct enters the drum, the air filter is located at the air inlet of the duct, the heating chamber is located behind the air filter, the atomizing system is located at the lower part of the drum, the feeder is located on one side of the drum, one end of the air outlet duct is located at the output end of the coating chamber, and the induced draft fan is located at the other end of the air outlet duct. This utility model reduces coating material waste, reduces material stickiness, and achieves uniform coating.

[0004] Although this patented technology solves the problems of easy waste of coating materials and uneven coating, the device lacks a hot air circulation function. During the hot melt coating process, the fluidized bed needs to be continuously heated to ensure that the core particles to be coated in the fluidized bed are stabilized at a temperature close to the melting point of the coating material after heat exchange with the hot air, so that the mist coating material sprayed onto the surface of the core particles to be coated can adhere evenly. Therefore, the exhaust temperature of the hot melt coating is often higher than the temperature of the core particles to be coated in the fluidized bed. The high-temperature exhaust air is discharged into the environment after filtration and cannot be recycled, while the incoming air needs to be continuously heated, resulting in a huge waste of energy. Therefore, those skilled in the art provide a hot air circulation hot melt coating fluidized bed to solve the problems raised in the above background technology. Summary of the Invention

[0005] 1. Technical problems solved The purpose of this application is to provide a hot air circulation hot melt coating fluidized bed with hot air circulation function, which solves the problem that the exhaust temperature of the hot melt coating is often higher than the temperature of the core material particles to be coated in the fluidized bed, the high-temperature exhaust air is discharged into the environment after filtering and cannot be recycled, and the incoming air needs to be continuously heated, which easily causes energy waste.

[0006] The hot air circulation hot melt coating fluidized bed provided in this application adopts the following technical solutions: The fan comprises a fluidized bed cavity, a melting tank body, an atomizing heating tank body, a cyclone separator, a dust filter collector, a fan and an infusion pump, the gas output end of the fluidized bed cavity is provided with an exhaust pipe, the gas input end of the fluidized bed cavity is provided with an air inlet pipe, the output end of the exhaust pipe is provided at the gas input end of the cyclone separator, the gas output end of the cyclone separator is provided with a separation outlet pipe, the gas input end of the dust filter collector is provided with a filter air inlet pipe, the gas output end of the dust filter collector is provided with a filter exhaust pipe, the separation outlet pipe is connected to the filter air inlet pipe, the gas input end of the fan is provided with an air inlet pipe, the gas output end of the fan is provided with an air exhaust pipe, the output end of the filter exhaust pipe is fixedly connected to the air inlet pipe, the air inlet pipe input end is provided with an air inlet heating box, the gas input end of the air inlet heating box is provided with a connecting air pipe, and the connecting air pipe is connected to the air exhaust pipe; By adopting the above technical solution and setting up a fluidized bed cavity, a material fluidization space can be provided, so that the particles are suspended under the action of hot air to achieve uniform coating. By setting up a melting tank, the coating material can be stored and heated to melt it into a liquid state, which is convenient for atomization spraying. By setting up an atomization heating tank, the compressed air can be preheated to ensure that the atomization gas temperature matches the molten coating liquid to prevent clogging of the spray gun. By setting up a cyclone separator, large particles in the air flow can be separated and recycled to reduce product losses. By setting up a dust filter collector, fine powder can be further captured to ensure that the exhaust gas is clean and avoid environmental pollution. By setting up a fan, the air flow can be driven to circulate to form a sealed The closed hot air circuit improves the utilization rate of thermal energy. By setting up an air inlet heating box, the circulating hot air can be heated and warmed. By setting up an infusion pump, the molten coating liquid can be transported from the melting tank to the atomization system to ensure continuous feeding. The exhaust pipe, separation outlet pipe, filter inlet pipe, filter exhaust pipe, air inlet pipe, air exhaust pipe and air inlet pipe can form a hot air circulation pipeline, which can realize the reheating and utilization of waste gas. The residual heat energy of the hot air after heat exchange with the coating material can be fully utilized and recycled after filtration, which greatly reduces the energy consumption of the hot melt coating process and reduces the impact of direct discharge of hot air after coating on the environment, realizing an environmentally friendly hot air circulation hot melt package.

[0007] Preferably, a first discharge valve is provided at the bottom of the cyclone separator, and a first dust collection bucket is provided at the bottom of the first discharge valve; By adopting the above technical solution and setting the first discharge valve, the timed discharge of the separated material can be controlled to prevent the backflow of airflow. By setting the first dust collection barrel, large particle materials can be recovered and put back into the fluidized bed to reduce waste.

[0008] Preferably, a second discharge valve is provided at the bottom of the dust filter collector, and a second dust collection bucket is provided at the bottom of the second discharge valve; By adopting the above technical solution and setting a second discharge valve, the captured fine powder can be discharged regularly to maintain the filter efficiency. By setting a second dust collection barrel, ultrafine dust can be collected to ensure that the discharged air meets environmental protection standards.

[0009] Preferably, a plurality of atomizing spray guns are provided on the surface of the fluidized bed cavity, and the output end of the atomizing spray gun is provided inside the fluidized bed cavity, and two upper and lower rows of fixed blocks are provided on the surface of the fluidized bed cavity, and an air pipe and a liquid pipe are respectively provided inside the upper and lower rows of fixed blocks, and the air pipe is at the top of the liquid pipe, and the input end of the atomizing spray gun is fixedly connected to a Y-shaped connecting pipe, and the two ends of the Y-shaped connecting pipe are respectively fixedly connected to the surface of the air pipe and the surface of the liquid pipe, the top of the melting tank body is provided with a stirring motor and a feeding port, the bottom of the melting tank body is provided with a discharge port, the surface of the atomizing heating tank body is provided with an air inlet valve and an air outlet valve, the output end of the air outlet valve is provided with an air connecting pipe, the liquid input end of the infusion pump is provided with a liquid extraction pipe, and the liquid output end of the infusion pump is provided with a liquid connecting pipe; By adopting the above technical solution, by setting a Y-shaped connecting pipe, hot air and molten liquid can be mixed, and then atomized under the action of the atomizing spray gun to ensure coating uniformity. By setting a stirring motor, the uniformity of the coating liquid can be maintained to prevent stratification of components. By setting a feeding port and a discharging port, raw material addition and melt liquid discharge are facilitated. By setting an air inlet valve and an air outlet valve, the temperature and flow of the atomizing gas can be precisely controlled.

[0010] Preferably, the input end of the liquid extraction pipe is fixedly connected to the output end of the discharge port; By adopting the above technical solution and arranging a liquid extraction pipe to be connected with the discharge port, the melt liquid conveying path can be shortened and heat loss can be reduced.

[0011] Preferably, the output end of the liquid connecting tube is fixedly connected to the surface of the liquid delivery tube, and the output end of the gas connecting tube is fixedly connected to the surface of the gas delivery tube; By adopting the above technical solution and providing a liquid connecting pipe and a gas connecting pipe, a straight-through design is adopted.

[0012] Preferably, a discharge port is provided at the bottom of the fluidized bed cavity, an air lock is provided at the bottom of the discharge port, and a storage barrel is provided at the bottom of the air lock; By adopting the above technical solution, the air lock device is set below the discharge port to seal the unloading, which can prevent air leakage from interfering with the fluidization state. By setting up a storage barrel, the finished products can be collected, supporting closed transfer, moisture-proof and pollution-proof.

[0013] Preferably, the surfaces of the gas connecting pipe and the liquid connecting pipe are both provided with insulation sleeves; By adopting the above technical solution, by providing a thermal insulation sleeve, the gas connecting pipe and the liquid connecting pipe can be wrapped, the temperature can be maintained, and the material can be prevented from solidifying and clogging the pipeline.

[0014] 2. Beneficial effects In summary, this application includes at least one of the following beneficial technical effects: 1. The present invention provides a hot air circulation hot melt coating fluidized bed. By setting a cyclone separator, large particles in the air flow are separated and recycled, thereby reducing product loss. By setting a dust filter collector, fine powder can be further captured to ensure the cleanliness of exhaust gas and avoid environmental pollution. By setting a fan, the air flow can be driven to circulate, forming a closed hot air loop, thereby improving the utilization rate of thermal energy. By setting an infusion pump, the molten coating liquid can be transported from the melting tank to the atomization system to ensure continuous feeding. A hot air circulation pipeline can be formed through an exhaust pipe, a separation exhaust pipe, a filter intake pipe, a filter exhaust pipe, an air intake pipe, an air exhaust pipe and an air intake pipe, thereby realizing waste gas reheating and utilization. The waste gas can be reheated and utilized, and the residual heat energy of the hot air after heat exchange with the coating material can be fully utilized and recycled after filtration, thereby greatly reducing the energy consumption of the hot melt coating process and reducing the impact of direct discharge of hot air after coating on the environment, thereby realizing an environmentally friendly hot air circulation hot melt package.

[0015] 2. The present invention provides a hot air circulation hot melt coating fluidized bed. By setting a first discharge valve, the timed discharge of the separated material can be controlled to prevent the airflow from flowing back. By setting a first dust collection bucket, large particle materials can be recovered and put back into the fluidized bed for use, reducing waste. By setting a second discharge valve, the captured fine powder can be discharged regularly to maintain the filter efficiency. By setting a second dust collection bucket, ultrafine dust can be collected to ensure that the discharged air meets environmental protection standards. By setting a Y-shaped connecting pipe, hot air and molten liquid can be mixed, and then under the action of the atomizing spray gun, it can be carried out. Atomization ensures coating uniformity. By setting a stirring motor, the uniformity of the coating liquid can be maintained and the stratification of components can be prevented. By setting a feeding port and a discharging port, the addition of raw materials and the discharge of the melt are facilitated. By setting an air inlet valve and an air outlet valve, the temperature and flow of the atomizing gas can be precisely controlled. By setting a liquid extraction pipe connected to the discharge port, the melt conveying path can be shortened and heat loss can be reduced. By setting an air lock below the discharge port, the unloading can be sealed to prevent air leakage from interfering with the fluidization state. By setting a storage barrel, the finished products can be collected, supporting closed transfer, moisture-proof and pollution-proof.

[0016] 3. The present invention provides a hot air circulation hot melt coating fluidized bed, which can wrap the gas connecting pipe and the liquid connecting pipe by arranging a heat-insulating sleeve, thereby maintaining the temperature and preventing the material from solidifying and clogging the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the front three-dimensional structure of the present invention; Figure 2 It is a structural schematic diagram of the melting tank body in the present invention; Figure 3 Schematic diagram of the structure of the cyclone separator in the present invention; Figure 4Schematic diagram of the structure of the fluidized bed cavity in the present invention; Figure 5 Schematic diagram of the structure of the infusion pump of the present invention; Figure 6 Schematic diagram of the structure of the atomizing heating tank in the present invention; Figure 7 This is a structural diagram of the core process of the hot air circulation hot melt coating fluidized bed in the present invention.

[0018] Among them, 1. Fluidized bed chamber; 101. Exhaust pipe; 102. Air inlet pipe; 103. Discharge port; 104. Air lock; 105. Storage barrel; 106. Air inlet heating box; 107. Connecting air pipe; 108. Atomizing spray gun; 109. Fixing block; 1010. Air pipe; 1011. Liquid pipe; 1012. Y-type connecting pipe; 2. Melting tank; 201. Stirring motor; 202. Feeding port; 203. Discharging port; 3. Atomizing heating tank; 301. Air inlet valve; 302. Air outlet valve; 303. Air connecting pipe; 4. Cyclone separator; 401. First discharge valve; 402. First dust collection bucket; 403. Separation outlet pipe; 5. Dust filter collector; 501. Filter air inlet pipe; 502. Filter exhaust pipe; 503. Second dust collection bucket; 504. Second discharge valve; 6. Fan; 601. Air inlet pipe; 602. Air exhaust pipe; 7. Infusion pump; 701. Liquid extraction tube; 702. Liquid connecting tube; 8. Insulation cover. DETAILED DESCRIPTION

[0019] The following is combined with Figure 1 -Attached Figure 7 , further details of this application are given.

[0020] Example 1: A hot air circulation hot melt coating fluidized bed, referring to Figure 1 、 Figure 2 and Figure 7, comprising a fluidized bed chamber 1, a melting tank 2, an atomizing heating tank 3, a cyclone separator 4, a dust filter collector 5, a fan 6 and an infusion pump 7, the gas output end of the fluidized bed chamber 1 is provided with an exhaust pipe 101, the gas input end of the fluidized bed chamber 1 is provided with an air inlet pipe 102, the output end of the exhaust pipe 101 is provided at the gas input end of the cyclone separator 4, the gas output end of the cyclone separator 4 is provided with a separation outlet pipe 403, the gas input end of the dust filter collector 5 is provided with a filter inlet pipe 501, the gas output end of the dust filter collector 5 is provided with a filter exhaust pipe 502, the separation outlet pipe 4 03 is connected to the filter air inlet pipe 501, the gas input end of the fan 6 is provided with an air inlet pipe 601, the gas output end of the fan 6 is provided with an air exhaust pipe 602, the output end of the filter exhaust pipe 502 is fixedly connected to the air inlet pipe 601, the input end of the air inlet pipe 102 is provided with an air inlet heating box 106, the gas input end of the air inlet heating box 106 is provided with a connecting air pipe 107, the connecting air pipe 107 is connected to the air exhaust pipe 602, by setting the fluidized bed cavity 1, a material fluidization space can be provided, so that the particles are suspended under the action of hot air to achieve uniform coating, and by setting the melting tank body 2, The coating material can be stored and heated to melt it into liquid state for easy atomization spraying. By setting up an atomization heating tank 3, the compressed air can be preheated to ensure that the atomization gas temperature matches the molten coating liquid to prevent clogging of the spray gun. By setting up a cyclone separator 4, large particles in the air flow can be separated and recycled to reduce product losses. By setting up a dust filter collector 5, fine powder can be further captured to ensure that the exhaust gas is clean and avoid environmental pollution. By setting up a fan 6, the air flow circulation can be driven to form a closed hot air circuit to improve the utilization rate of thermal energy. By setting up an air inlet heating box 106, the hot air after circulation can be heated and compensated. An infusion pump 7 is provided to transport the molten coating liquid from the melting tank to the atomization system to ensure continuous feeding. A hot air circulation pipeline can be formed through the exhaust pipe 101, the separation outlet pipe 403, the filter air inlet pipe 501, the filter exhaust pipe 502, the air inlet pipe 601, the air exhaust pipe 602 and the air inlet pipe 102, so as to realize the reheating and utilization of the waste gas. The residual heat energy of the hot air after heat exchange with the coating material can be fully utilized and recycled after filtration, which greatly reduces the energy consumption of the hot melt coating process and reduces the impact of direct discharge of hot air after coating on the environment, thereby realizing an environmentally friendly hot air circulation hot melt package.

[0021] See also Figure 3A first discharge valve 401 is provided at the bottom of the cyclone separator 4, and a first dust collecting bucket 402 is provided at the bottom of the first discharge valve 401. By setting the first discharge valve 401, the timed discharge of the separated material can be controlled to prevent the airflow from flowing back. By setting the first dust collecting bucket 402, large particle materials can be recovered and put back into the fluidized bed for use, reducing waste. A second discharge valve 504 is provided at the bottom of the dust filter collector 5, and a second dust collecting bucket 503 is provided at the bottom of the second discharge valve 504. By setting the second discharge valve 504, the captured fine powder can be discharged regularly to maintain the filter efficiency. By setting the second dust collecting bucket 503, ultrafine dust can be collected to ensure that the discharged air meets environmental protection standards.

[0022] See also Figure 4 、 Figure 5 and Figure 6, a plurality of atomizing spray guns 108 are provided on the surface of the fluidized bed cavity 1, and the output end of the atomizing spray gun 108 is provided inside the fluidized bed cavity 1, and two rows of upper and lower fixed blocks 109 are provided on the surface of the fluidized bed cavity 1, and the upper and lower rows of fixed blocks 109 are respectively provided with an air pipe 1010 and a liquid pipe 1011, and the air pipe 1010 is at the top of the liquid pipe 1011, and the input end of the atomizing spray gun 108 is fixedly connected with a Y-type connecting pipe 1012, and the two ends of the Y-type connecting pipe 1012 are respectively fixedly connected to the surface of the air pipe 1010 and the surface of the liquid pipe 1011, and a stirring motor 201 and a casting are provided on the top of the melting tank body 2. A material port 202 is provided, and a discharge port 203 is provided at the bottom of the melting tank body 2. An air inlet valve 301 and an air outlet valve 302 are provided on the surface of the atomizing heating tank body 3. An air connecting pipe 303 is provided at the output end of the air outlet valve 302. A liquid extraction pipe 701 is provided at the liquid input end of the infusion pump 7, and a liquid connecting pipe 702 is provided at the liquid output end of the infusion pump 7. By providing a Y-shaped connecting pipe 1012, hot air and molten liquid can be mixed, and then atomized under the action of the atomizing spray gun 108 to ensure coating uniformity. By providing a stirring motor 201, the coating liquid uniformity can be maintained to prevent component stratification. By providing a feeding port 202 and discharge port 203 are convenient for adding raw materials and discharging melt liquid. By setting the air inlet valve 301 and the air outlet valve 302, the temperature and flow of the atomizing gas can be accurately controlled. The input end of the liquid extraction pipe 701 is fixedly connected to the output end of the discharge port 203. By setting the liquid extraction pipe 701 to be connected with the discharge port 203, the melt liquid transportation path can be shortened and heat loss can be reduced. The output end of the liquid connecting pipe 702 is fixedly connected to the surface of the liquid delivery pipe 1011, and the output end of the gas connecting pipe 303 is fixedly connected to the surface of the gas delivery pipe 1010. By setting the liquid connecting pipe 702 and the gas connecting pipe 303, a straight-through design is adopted. A discharge port 103 is provided at the bottom of the fluidized bed cavity 1, an air shutoff 104 is provided at the bottom of the discharge port 103, and a storage barrel 105 is provided at the bottom of the air shutoff 104. By arranging the air shutoff 104 below the discharge port 103, the unloading can be sealed, and the air flow leakage can be prevented from interfering with the fluidization state. By arranging the storage barrel 105, the finished products can be collected, and closed transfer is supported, and moisture-proof and pollution-proof. The surfaces of the gas connecting pipe 303 and the liquid connecting pipe 702 are both provided with an insulation sleeve 8. By arranging the insulation sleeve 8, the gas connecting pipe 303 and the liquid connecting pipe 702 can be wrapped to maintain the temperature and prevent the material from solidifying and clogging the pipeline.

[0023] The implementation principle of the embodiment of the present application is as follows: when in use, the coating material can be melted into a liquid state under the action of the melting tank body 2, and then, under the action of the infusion pump 7, the molten coating liquid can be transported from the melting tank to the infusion pipe 1011 through the liquid extraction pipe 701 and the liquid connecting pipe 702. The compressed air is heated by the atomizing heating tank body 3 and then transported to the air delivery pipe 1010 through the gas connecting pipe 303. Then, under the action of the Y-shaped connecting pipe 1012, the hot air and the molten liquid can be mixed to the atomizing spray gun 108. The heated compressed air can atomize the molten coating material into tiny droplets and spray them onto the surface of the material to be coated. The purified circulating air is driven and pressurized by the fan 6 and enters the fluidized bed cavity 1 through the air exhaust pipe 602, the connecting air pipe 107, the air inlet heating box 106, and the air inlet pipe 102, entraining the coating material for fluidized motion, thereby achieving the extension of the coating film. The air after heat exchange with the coating material can enter the cyclone separator 4 through the exhaust pipe 101, which can separate the large particles in the air flow and recycle them. After passing through the cyclone separator 4, it enters the dust filter collector 5 to further capture fine powder, ensuring the cleanliness of the exhaust gas and avoiding environmental pollution. The purified hot air passes through the filter exhaust pipe 502 and the air inlet pipe 601 and enters the fan 6, and then continues to pass through the above-mentioned pipeline to enter the fluidized bed cavity 1 for circulation. After the coating is completed, the coated material enters the storage barrel 105 through the air-blocking device 104 and the discharge port 103 to complete the coating discharge. Through the above operation, the residual heat energy of the hot air after heat exchange with the coating material can be fully utilized, and it can be recycled after filtration, which greatly reduces the energy consumption of the hot melt coating process and reduces the impact of the direct discharge of the hot air after coating on the environment, thereby realizing environmentally friendly hot air circulation hot melt coating; By setting the air lock 104 below the discharge port 103, the unloading can be sealed, and the air leakage can be prevented from interfering with the fluidized state. By setting the storage barrel 105, the finished products can be collected, supporting closed transfer, moisture-proof and pollution-proof. By setting the first discharge valve 401, the timed discharge of the separated materials can be controlled to prevent the air flow from flowing back. Then, under the action of the first dust collection barrel 402, the large particle materials can be recovered and put back into the fluidized bed to reduce waste. By setting the second discharge valve 504, the captured fine powder can be discharged regularly to maintain the filter efficiency. Then, under the action of the second dust collection barrel 503, ultrafine dust can be collected to ensure that the discharged air meets environmental protection standards. When the coating material is melted, the stirring motor 201 is set. When the stirring motor 201 is running, the uniformity of the coating liquid can be maintained and the stratification of the components can be prevented. By setting the feeding port 202 and the discharging port 203, the addition of raw materials and the discharge of the melt liquid are facilitated. By setting the air inlet valve 301 and the air outlet valve 302, the temperature and flow of the atomizing gas can be accurately controlled. When the mixed hot air and the molten liquid continue to be transported, the air connecting pipe 303 and the liquid connecting pipe 702 can be wrapped under the action of the insulation sleeve 8, which can maintain the temperature and prevent the material from solidifying and clogging the pipeline.

[0024] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A hot air circulation hot melt coating fluidized bed, comprising a fluidized bed cavity (1), a melting tank (2), an atomizing heating tank (3), a cyclone separator (4), a dust filter collector (5), a fan (6) and an infusion pump (7), characterized in that: The gas output end of the fluidized bed chamber (1) is provided with an exhaust pipe (101), the gas input end of the fluidized bed chamber (1) is provided with an air inlet pipe (102), the output end of the exhaust pipe (101) is provided at the gas input end of the cyclone separator (4), the gas output end of the cyclone separator (4) is provided with a separation outlet pipe (403), the gas input end of the dust filter collector (5) is provided with a filter inlet pipe (501), the gas output end of the dust filter collector (5) is provided with a filter exhaust pipe (502), the separation outlet pipe (4 03) is connected to the filter air inlet pipe (501), the gas input end of the fan (6) is provided with an air inlet pipe (601), the gas output end of the fan (6) is provided with an air exhaust pipe (602), the output end of the filter exhaust pipe (502) is fixedly connected to the air inlet pipe (601), the input end of the air inlet pipe (102) is provided with an air inlet heating box (106), the gas input end of the air inlet heating box (106) is provided with a connecting air pipe (107), and the connecting air pipe (107) is connected to the air exhaust pipe (602).

2. The hot air circulation hot melt coating fluidized bed according to claim 1, characterized in that: A first discharge valve (401) is provided at the bottom of the cyclone separator (4), and a first dust collection bucket (402) is provided at the bottom of the first discharge valve (401).

3. The hot air circulation hot melt coating fluidized bed according to claim 1, characterized in that: A second discharge valve (504) is provided at the bottom of the dust filter collector (5), and a second dust collection bucket (503) is provided at the bottom of the second discharge valve (504).

4. The hot air circulation hot melt coating fluidized bed according to claim 1, characterized in that: The surface of the fluidized bed cavity (1) is provided with a plurality of atomizing spray guns (108), the output end of the atomizing spray gun (108) is provided inside the fluidized bed cavity (1), and the surface of the fluidized bed cavity (1) is provided with two upper and lower rows of fixed blocks (109), and the upper and lower rows of fixed blocks (109) are respectively provided with an air supply pipe (1010) and a liquid supply pipe (1011), the air supply pipe (1010) is located at the top of the liquid supply pipe (1011), and the input end of the atomizing spray gun (108) is fixedly connected to a Y-shaped connecting pipe (1012), and the two ends of the Y-shaped connecting pipe (1012) are respectively connected to the Y-shaped connecting pipe (1012). The atomizing and heating tank body (3) is fixedly connected to the surface of the gas transmission pipe (1010) and the surface of the liquid transmission pipe (1011), respectively. The top of the melting tank body (2) is provided with a stirring motor (201) and a feeding port (202), the bottom of the melting tank body (2) is provided with a discharge port (203), the surface of the atomizing and heating tank body (3) is provided with an air inlet valve (301) and an air outlet valve (302), the output end of the air outlet valve (302) is provided with an air connecting pipe (303), the liquid input end of the infusion pump (7) is provided with a liquid extraction pipe (701), and the liquid output end of the infusion pump (7) is provided with a liquid connecting pipe (702).

5. The hot air circulation hot melt coating fluidized bed according to claim 4, characterized in that: The input end of the liquid extraction pipe (701) is fixedly connected to the output end of the discharge port (203).

6. The hot air circulation hot melt coating fluidized bed according to claim 5, characterized in that: The output end of the liquid connecting tube (702) is fixedly connected to the surface of the liquid delivery tube (1011), and the output end of the gas connecting tube (303) is fixedly connected to the surface of the gas delivery tube (1010).

7. The hot air circulation hot melt coating fluidized bed according to claim 1, characterized in that: A discharge port (103) is provided at the bottom of the fluidized bed cavity (1), an air lock (104) is provided at the bottom of the discharge port (103), and a material storage barrel (105) is provided at the bottom of the air lock (104).

8. The hot air circulation hot melt coating fluidized bed according to claim 4, characterized in that: The surfaces of the gas connecting pipe (303) and the liquid connecting pipe (702) are both provided with thermal insulation sleeves (8).

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