A microwave low-temperature air jet vibration dryer for coal drying

Abstract

The invention discloses a microwave low-temperature air jet vibration dryer for drying injected coal, belonging to the technical field of coal slime drying; the dryer comprises a dryer tank body and a vibration jet drying processing mechanism and a microwave transmitting mechanism arranged therein; the bottom of the tank body is connected to a product recovery mechanism; the vibration jet drying processing mechanism comprises a high-pressure jet pipe and a product processing platform; one end of the high-pressure jet pipe is connected to an air pump pressure supply mechanism, and the other end is connected to a plurality of high-pressure nozzles, and the vibration jet drying processing mechanism performs air jet drying on the material; the microwave transmitting mechanism is used to perform microwave drying on the material; the product processing platform is connected to a vibration motor and a processing platform angle adjustment mechanism; the invention can achieve the effects of high-pressure airflow drying, microwave low-temperature dehumidification, and efficient product processing for injected coal, thereby solving the problem that the existing coal slime dehydration effect is not ideal.

Description

Technical Field

[0001] The invention belongs to the technical field of coal slime drying and relates to a microwave low-temperature air jet vibration dryer for spraying coal drying. Background Art

[0002] Blast furnace (BF) pulverized coal injection (PFI) is a production technology primarily used in blast furnace ironmaking. By replacing the coke required for conventional metallurgy with PFI, pulverized coal injection can significantly improve smelting efficiency and reduce costs. However, if the PFI coal product required in the production process contains a high moisture content, its combustion efficiency will be lower and the flue gas volume will be higher, which is not conducive to the implementation of PFI technology. Therefore, PFI coal products must reach a certain dryness to meet smelting production standards and achieve optimal production results.

[0003] Currently, the most commonly used methods for coal slime dehydration include mechanical dehydration and thermal drying. However, mechanical dehydration suffers from low dehydration efficiency and high energy consumption. While thermal drying offers high drying efficiency, it also suffers from high energy consumption and the high temperatures can lead to a harsh industrial production environment. Therefore, traditional coal slime drying technologies struggle to achieve low-energy, high-efficiency dehydration. Further research and exploration of new coal slime drying technologies are needed to address these issues. Summary of the Invention

[0004] The present invention overcomes the deficiencies of the prior art and proposes a microwave low-temperature air jet vibration dryer for coal drying to solve the above technical problems.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions.

[0006] A microwave low-temperature air jet vibration dryer for coal drying comprises a dryer tank body, a vibration jet drying mechanism and a microwave emission mechanism are provided in the dryer tank body; a discharge port at the bottom of the dryer tank body is connected to a product recovery mechanism;

[0007] The vibrating jet drying mechanism includes a high-pressure jet tube and a product processing platform; one end of the high-pressure jet tube is connected to an air pump pressure supply mechanism, and the other end is connected to a plurality of high-pressure nozzles, and the product processing platform is located directly below the plurality of high-pressure nozzles; the product processing platform is connected to a feed conveying pipeline; the gas provided by the air pump pressure supply mechanism is sprayed onto the material on the product processing platform through the high-pressure jet tube and the high-pressure nozzles, thereby performing air jet drying on the material; the microwave emission mechanism is used to perform microwave drying on the material;

[0008] The product processing platform is connected to a vibration motor and a processing platform angle adjustment mechanism; the processing platform angle adjustment mechanism is used to adjust the inclination of the product processing platform so that the material falls into the discharge port at the bottom of the dryer tank.

[0009] Furthermore, the inner wall of the dryer tank is connected to a plurality of vibrating jet drying processing mechanisms evenly distributed from top to bottom, each vibrating jet drying processing mechanism is connected to a feed conveying pipe, and the plurality of feed conveying pipes extend out of the top of the dryer tank and are connected to the feed conveyor belt.

[0010] Furthermore, the feed conveyor belt is divided into two sections for transportation, wherein the first section of the feed conveyor belt is a low-speed transportation section, the right side of the first section of the feed conveyor belt is the second section of the feed conveyor belt, the second section of the feed conveyor belt is a high-speed transportation belt, and the right side of the second section of the high-speed transportation belt is connected to the feed conveying pipeline.

[0011] Furthermore, a gate knife mechanism is installed on the upper side of the first section of the feeding conveyor belt, and the gate knife mechanism includes a gate knife, a retractable electric rod and a gate knife baffle. The gate knife is installed on the retractable electric rod, and a gate knife baffle is installed at the front end of the retractable electric rod; the gate knife is driven by the retractable electric rod to cut the coal slime on the first section of the feeding conveyor belt into pieces.

[0012] Furthermore, a connecting hinge is provided on the inner wall of the dryer tank, the end of the product processing platform is hinged to the connecting hinge, one end of the processing platform angle adjustment mechanism is hinged to the connecting hinge, and the other end is hinged to the middle part of the angle adjustment base plate, one end of the angle adjustment base plate is hinged to the inner wall of the dryer tank, and the other end is connected to the bottom end of the industrial spring, and the top end of the industrial spring is connected to the bottom of the product processing platform.

[0013] Furthermore, the processing platform angle adjustment mechanism is an electromagnetic telescopic rod.

[0014] Furthermore, the vibration motor is fixed at the bottom of the product processing platform. Inside the vibration motor is a servo motor consisting of a stator and a rotor. A group of adjustable eccentric blocks are installed at both ends of the rotor shaft of the servo motor. When the servo motor rotor shaft rotates, the adjustable eccentric blocks are driven to rotate. One end of the adjustable eccentric block is fixed on the servo motor rotor shaft, and a counterweight block is added to the other end.

[0015] Furthermore, the air pump pressure supply mechanism is composed of an air pump, an air pump air storage tank body, and an air pump pipeline connected in sequence, and a barometer is installed at the connection between the air pump pipeline and the air pump air storage tank body; the air pump pipeline is connected to the high-pressure jet tube, and a flow meter is installed at the connection between the air pump pipeline and the high-pressure jet tube.

[0016] Furthermore, the microwave emitting mechanism is located on the top inner wall of the dryer tank and consists of two microwave emitters; the discharge port is provided with a first closed valve and a second closed valve, and the first closed valve and the second closed valve are opened alternately to ensure that the dryer tank always maintains a closed environment when the pulverized coal product is discharged. When the pulverized coal is discharged, the weight sensor connected to the first closed valve and the second closed valve controls the alternating opening and closing of the valves.

[0017] Furthermore, the product recovery mechanism includes a product discharge conveyor belt and a product collection area, the feed port of the product discharge conveyor belt is arranged at the bottom of the discharge port, and the discharge port of the product discharge conveyor belt is connected to the product collection area;

[0018] The dryer tank is connected to the cyclone dust collector through an air suction pump and an air suction pump pipeline. The lower end of the cyclone dust collector is connected to the residual product collection area, and the upper end of the cyclone dust collector is connected to the waste dust collection area.

[0019] The beneficial effects of the present invention compared to the prior art are:

[0020] The microwave low-temperature air jet vibration dryer used for coal injection drying of the present invention is different from the mechanical and thermal drying and dehydration methods used in traditional coal slime drying equipment. The present invention adopts a combination of microwave emitters and high-speed and high-pressure jet treatment of coal injection products. The microwave emitter is used to quickly heat the moisture inside and on the surface of the coal injection product through high-frequency microwaves in a closed dryer tank, and the high-speed and high-pressure blowing technology is used to accelerate the drying of the coal injection slime. The dust of the coal injection product and the hot and humid air in the tank are then discharged through the exhaust gas treatment mechanism, solving the problems of low dehydration efficiency and high energy consumption in traditional mechanical and thermal drying and dehydration methods. Through the above-mentioned technical means, the coal slime drying process can be made more efficient, clean, and reduce energy consumption. The present invention relates to a systematic coal slime drying process. Unlike the super-large and lengthy coal slime drying treatment system in industrial production, the production process of the present invention is simple and more conducive to large-scale industrial coal slime drying treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the microwave low-temperature air jet vibration dryer of the present invention;

[0022] Figure 2 This invention Figure 1 A partial enlarged schematic diagram of the plane structure at point A in the middle;

[0023] Figure 3 This invention Figure 2 Schematic diagram of the three-dimensional structure;

[0024] Figure 4 This invention Figure 3 Schematic diagram of the planar structure of the vibration motor;

[0025] Figure 5 This invention Figure 1 A partially enlarged schematic diagram of the planar structure of the knife gate mechanism.

[0026] In the picture:

[0027] 1. Tank body; 2. Feeding and conveying pipeline;

[0028] 3. Feeding conveyor belt; 301. First section of feeding conveyor belt; 302. Second section of feeding conveyor belt;

[0029] 4. Blade mechanism; 401. Blade; 402. Telescopic electric rod; 403. Blade baffle;

[0030] 5. Vibratory jet drying mechanism; 501. High-pressure jet tube; 502. Product processing platform; 503. Mechanism connection hinge; 504. Vibration motor; 505. Spring connection unit; 506. Processing platform angle adjustment mechanism; 511. Airflow transport unit; 512. Airflow buffer unit; 513. Jet tube high-pressure action area; 521. Product limit baffle; 522. Industrial spring; 523. Angle adjustment base plate; 531. Servo motor; 532. Servo motor rotor shaft; 533. Adjustable eccentric block; 534. Counterweight;

[0031] 6. Air pump pipe; 7. Air pump tank; 8. Air pump; 9. Barometer; 901. Flow meter; 10. Microwave transmitter;

[0032] 11. Discharge port; 1101. First closing valve; 1102. Second closing valve.

[0033] 12. Vacuum pump; 13. Vacuum pump pipeline; 14. Cyclone dust collector; 15. Product collection area; 16. Waste dust collection area; 18. Product discharge conveyor belt. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. The technical solutions of the present invention will be described in detail below with reference to the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0035] like Figures 1 to 5As shown, this embodiment proposes a microwave low-temperature air jet vibration dryer for coal blast drying technology, including a dryer tank body 1, a gate mechanism 4 for processing incoming coal samples, a feed conveyor belt 3 for transporting incoming coal samples, a vibration jet drying treatment mechanism 5, a microwave emitting mechanism, an air pump pressure supply mechanism, an exhaust gas treatment mechanism, and a product recovery mechanism.

[0036] A feed coal sample processing mechanism is connected to the top of the dryer tank body 1, the feed coal sample processing mechanism is connected to the feed coal sample transportation mechanism, the feed coal sample transportation mechanism is connected to the vibration jet drying processing mechanism, the vibration drying processing mechanism is connected to the air pump pressure supply mechanism, a microwave transmitting mechanism is installed on the inner wall of the upper surface of the dryer tank body, the upper right corner of the dryer tank body is connected to the waste processing mechanism, and the lower end of the dryer tank body is connected to the product recovery mechanism.

[0037] The top of the dryer tank 1 is connected to the feed conveying pipe 2, the upper end of the feed conveying pipe 2 is connected to the end of the feed conveyor belt 3, and a gate mechanism 4 is installed on the upper side of the feed conveyor belt 3 for cutting and separating coal samples. The gate mechanism 4 includes a gate 401, a retractable electric rod 402 and a gate baffle 403. The gate 401 is installed on the retractable electric rod 402, and the front end of the retractable electric rod 402 is installed with a gate baffle 403. Considering safety, the gate mechanism 4 needs to be sealed in the working area during actual production work to prevent production accidents. At the same time, the sealed package should adopt a packaging box with sponge material on the inner wall, which can effectively block the noise generated by the gate mechanism 4 during the production process. The gate knife mechanism 4 cuts the coal slime into pieces through the gate knife 401, and the gate knife 401 cuts the coal slime into pieces by a retractable electric rod 402. In actual application, the gate knife 401 should adopt a front end inclination angle of 30° and a gate knife specification of not less than 20 cm in width. At the same time, it should be made of high-strength carbon steel to prevent the gate knife from being damaged by hard minerals that may exist in the injected coal, thereby improving the working intensity and service life of the gate knife. The retractable electric rod 402 is stably controlled by a servo motor. A gate knife baffle 403 is installed at the front end of the retractable electric rod 402 to block the coal slime adhered to the gate knife 401 after the coal slime cutting action, thereby forming a certain cleaning and protection effect on the gate knife 401 and improving its service life. The lower side of the knife mechanism 4 is the feed conveyor belt 3, which is divided into two sections of transportation. The first section of the feed conveyor belt 301 is a low-speed transportation section, which is mainly used for transporting pulverized coal materials and cutting and processing materials by the knife. This section of the conveyor belt needs to be built with a high-strength structure to prevent the knife 401 from working for a long time and causing damage to the conveyor belt. The right side of the first section of the feed conveyor belt 301 is the second section of the feed conveyor belt 302. The second section of the feed conveyor belt 302 is a high-speed conveyor belt, which mainly performs the function of further separating and transporting the unit materials after cutting and separation. In order to ensure the continuity of transportation and the effective separation between individual unit materials, the differential speed between the two sections of the conveyor belt should be maintained between 30% and 50%. The right side of the second section of the high-speed conveyor belt 302 is connected to the material transportation pipeline 2. There is an electromagnetic valve at the upper end of the material transportation pipeline 2. After the pulverized coal material reaches the position of each pipeline mouth, the electromagnetic valve automatically opens to realize the transportation of the pulverized coal material and enters each vibration jet drying treatment mechanism 5 along the material transportation pipeline.

[0038] like Figure 1 As shown, a plurality of vibrating jet drying treatment mechanisms 5 are arranged on the inner wall of the dryer tank 1, and the upper right end of the vibrating jet drying treatment mechanism 5 is connected to the feed conveying pipe 2. The feeding angle of the end of the feed conveying pipe 2 should be set between 15° and 45° to ensure that the pulverized coal product enters the vibrating jet drying treatment mechanism 5 smoothly. The left side of the vibrating jet drying treatment mechanism 5 is connected to the air pump pipe 6.

[0039] See Figure 2and Figure 3 The uppermost part of the vibrating jet drying treatment mechanism 5 is a high-pressure jet tube 501. The smooth airflow from the air pump pipe 6 is compressed into a high-speed high-pressure airflow when passing through the high-pressure jet tube 501 and acts on the pulverized coal product. The lower side of the high-pressure jet tube 501 is a product processing platform 502. The specifications of the product processing platform are based on the required processing volume of the pulverized coal sample. The conventional reference specification is 8m×4m. At the same time, the edge of the platform should be smooth and rounded to facilitate the pulverized coal product to fall after vibration after drying. The product processing platform 502 is connected with a mechanism connection hinge 503, a vibration motor 504 and a spring connecting part 505; the mechanism connection hinge 503 and the spring connecting part 505 are jointly connected to the processing platform angle adjustment mechanism 506.

[0040] The high-pressure jet tube 501 is divided into three parts: upper, middle and lower. The upper part of the high-pressure jet tube is the airflow transport area 511, the middle part is the airflow buffer area 512, and the lower part is the jet tube high-pressure action area 513. The key structure of the high-pressure jet tube 501 is the jet tube high-pressure action area 513 in the lower part. The jet tube high-pressure action area 513 is composed of four rows and fourteen columns of conical high-pressure nozzles. The high-pressure nozzles are wide at the top and narrow at the bottom, and the air outlet is a narrow mouth. According to the principle of the pressurizer, under this structure, a smooth airflow can form a high-pressure airflow through the mechanical structure by itself. The high-speed and high-pressure airflow can perform simple and efficient drying treatment on a large amount of pulverized coal on the product processing platform 502. At the same time, the upper, middle and lower parts of the high-pressure jet tube should maintain smooth connection at the connection to ensure the stability of the high-pressure airflow. The product processing platform 502 should be adapted to the size of the high-pressure action area 513 of the jet tube. There is a product limit baffle 521 near the mechanism connection hinge 503 on the product processing platform 502. The height of the product limit baffle should be completely close to the high-pressure action area 513 of the jet tube. The mechanism connection hinge 503 is rigidly welded to the inner wall of the dryer tank body 1. There are two corner hinge structures on one side of the mechanism connection hinge 503, which are respectively used to fix the product processing platform 502 and the processing platform angle adjustment mechanism 506. Considering the high-intensity vibration during production, the material of the corner hinge structure should be 40Cr alloy structural steel, which can be suitable for heavy-load, low-impact and wear-resistant industrial production environments.

[0041] The processing platform angle adjustment mechanism 506 is an electromagnetic telescopic rod. There is a spring connection part 505 on the processing platform angle adjustment mechanism 506, which is composed of three industrial springs 522 of certain specifications. The material properties and elastic strength of the industrial springs 522 must meet the working intensity during vibration operation. High-strength spring steel should be used. When the vibration motor 504 vibrates at high intensity, the product processing platform 502 can be fully vibrated. Combined with the processing platform angle adjustment mechanism 506, the platform inclination is adjusted, so that the processed pulverized coal injection products are completely shaken off. The spring connection part 5 The lower end of 05 is connected to the angle adjustment base plate 523 through a hinge structure, and the upper surface of the angle adjustment base plate 523 is connected to the electromagnetic telescopic rod through a hinge structure. The other end of the electromagnetic telescopic rod is connected to the mechanism connection hinge 503 through a hinge structure. The electromagnetic telescopic rod is controlled by a servo motor and a controllable PLC. The two adjustable limit positions of the electromagnetic telescopic rod correspond to the inclination limit positions of the product processing platform 502 respectively. The maximum limit position of the inclination angle of the product processing platform is the same as the feeding inclination angle of the pulverized coal material, and the minimum limit position is the same as the inclination position of the pulverized coal product after processing.

[0042] like Figure 4 As shown, the vibration motor 504 is fixed at the bottom of the product processing platform 502. The interior of the vibration motor 504 is a conventional servo motor 531 composed of a stator and a rotor. A set of adjustable eccentric blocks 533 are installed at both ends of the servo motor's rotor shaft 532. One end of the adjustable eccentric block 533 is used to be fixed on the servo motor rotor shaft 532, and the other end is used to add a counterweight block 534. When the servo motor rotor shaft 532 rotates, the adjustable eccentric block 533 is driven to rotate. Since the counterweight of the eccentric block in the rotation direction is unbalanced, the centrifugal force generated by the high-speed rotation will further obtain an exciting force, that is, high-intensity vibration is formed to shake off the processed pulverized coal products.

[0043] like Figure 1 As shown, the air pump pressure supply mechanism is composed of an air pump air storage tank body 7, an air pump pipeline 6 and an air pump 8. The main pipeline of the air pump pipeline 6 is divided into several pipelines at the connection point leading to the vibration jet drying treatment mechanism 5. A barometer 9 is installed at the connection between the air pump pipeline 6 and the air pump air storage tank body 7 for detecting the air pressure value in the air pump tank body 7. A flow meter 901 is respectively installed at the connection between the air pump pipeline 6 and the vibration jet drying treatment mechanism 5 for detecting the flow rate through the pipeline. By monitoring the high-pressure jet data and corresponding to the effect of the pulverized coal product treatment at the same time, the relevant parameters of the air pump pressure supply mechanism are continuously optimized in the actual production process to achieve better treatment effect. The air pump tank body 7 is connected to the air pump 8. The air pump tank body 7 is used to store the compressed gas generated by the operation of the air pump 8, which plays the role of air buffer and stabilizing the system pressure.

[0044] like Figure 1As shown, the microwave emitting mechanism is located on the top inner wall of the dryer tank 1 and is composed of two microwave emitters 10. The microwave emitters 10 continuously or intermittently emit high-energy microwaves when working, forming an excellent heating function inside the closed dryer tank 1. At the same time, the microwave energy can penetrate the interior of the pulverized coal product and heat the inside and outside of the pulverized coal at the same time. The ultra-high frequency microwave energy will quickly evaporate the water molecules, forming an excellent drying effect. The use of microwave drying not only has good effects, but also requires less energy consumption and is easy to control and simple and convenient. It should be noted that the temperature of the heating method using the microwave emitter should be Maintained at 50℃-120℃, the lower part of the dryer tank 1 is the discharge port 11, which is provided with a first closed valve 1101 and a second closed valve 1102. The dryer requires microwave heating and cavity air extraction when working. The double-valve discharge port with two closed valves can ensure that the pulverized coal product always maintains a closed space inside the dryer tank 1 during discharge. When the pulverized coal is discharged, the weight sensors set by the first closed valve 1101 and the second closed valve 1102 realize the alternating switching action of the valves, thereby smoothly discharging the processed pulverized coal product.

[0045] like Figure 1 As shown, the waste treatment mechanism and product recovery mechanism are located on the right side of the dryer tank body 1. The air pump 12 extracts the air inside the dryer tank body 1 through the air pump pipe 13 and transmits it to the cyclone dust collector 14. The cyclone dust collector 14 uses the turbid air carrying fine coal injection products with the help of the cyclone dust collector's own structure to capture the fine coal injection products on the wall of the device. Due to the effect of gravity, the captured coal injection will fall by itself and be collected in the product collection area 15. The lower end of the cyclone dust collector 14 is connected to the product collection area 15, and the upper end is connected to the waste dust collection area. Area 16, the exhaust port at the top of the cyclone dust collector 14 discharges mostly clean exhaust gas, which may still contain some injected coal dust, but of lower quality. This is collected in the waste dust collection area 16, improving the recovery rate while preventing environmental impact. It is also worth noting that the structural parameters and production process parameters of the cyclone dust collector 14, such as the dust collector air inlet specifications, the diameter and height of the cylinder, the diameter and depth of the exhaust port, the dust collector inlet air flow velocity, and the inlet mass concentration of the dust-laden gas, should be appropriately adjusted based on the actual production process. Below the discharge port 11 is the product discharge conveyor 18, the end of which is connected to the product collection area 15.

[0046] The method of use (working principle) of the present invention is as follows:

[0047] First, the pulverized coal raw material is transported through the first section of the feeding conveyor belt 301. When it is transported to the middle section of the conveyor belt, the pulverized coal raw material is cut by the knife mechanism 4. When passing through the junction of the first section of the feeding conveyor belt 301 and the second section of the feeding conveyor belt 302, due to the different conveying speeds of the two sections of the conveyor belt, the distance between each portion of the cut and separated pulverized coal raw material increases. As the second section of the feeding conveyor belt 302 is transported, each portion of the pulverized coal raw material is put into each feeding conveying pipe 2. At this time, the product processing platform 502 is controlled by the processing platform angle adjustment mechanism 506 to make the platform inclination angle the same as the feeding inclination angle of the feeding conveying pipe 2. The pulverized coal raw material is then transported to the product processing platform 502 of the vibrating jet drying processing mechanism 5 via the feeding conveying pipe 2.

[0048] Afterwards, the microwave launcher 10 and the high-pressure jet tube 501 start working, and the microwave launcher 10 heats the entire interior of the dryer tank body 1. At the same time, the high-pressure jet tube 501 is turned on to spray high-pressure gas from each jet tube to process the pulverized coal products on the product processing platform 502. After a certain period of processing, the vacuum pump is turned on. After the drying process of the pulverized coal products is completed, the processing platform angle adjustment mechanism 506 controls the platform angle of the product processing platform 502 to the lowest limit position, and some pulverized coal products will slide to the bottom of the dryer tank body 1 by themselves. At the same time, the vibration motor 504 at the bottom of the product processing platform 502 is turned on to make the remaining pulverized coal products on the product processing platform 502 vibrate and slide.

[0049] Finally, all the dried pulverized coal products are concentrated at the bottom of the dryer tank 1. At this time, the first closed valve 1101 and the second closed valve 1102 at the bottom of the dryer tank 1 are in the closed state. The first closed valve 1101 is opened and the second closed valve 1102 remains closed. The pulverized coal concentrated at the bottom of the dryer tank falls and is concentrated on the second closed valve 1102. Then the first closed valve 1101 is closed first, and then the second closed valve 1102 is opened to keep the internal space of the dryer tank closed. The pulverized coal products are then transported to the product discharge conveyor belt 18, and then the pulverized coal products are transported to the product collection area 15. After the turbid air inside the dryer tank is processed by the vacuum pump 12, the vacuum pump pipe 13 and the cyclone dust collector 14, the large-mass coal injection product particles contained in the turbid air are collected into the product collection area 15 from the lower discharge port of the cyclone dust collector, while the very small amount of fine coal injection dust in the turbid air is collected into the waste dust collection area 16 from the upper discharge port of the cyclone dust collector. At this point, one cycle of the production process is completed.

[0050] The above content is a further detailed description of the present invention in combination with a specific preferred embodiment. It cannot be considered that the specific embodiments of the present invention are limited to this. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the present invention, which should be regarded as belonging to the scope of patent protection determined by the submitted claims of the present invention.

Claims

1. A microwave low-temperature air jet vibration dryer for coal drying, characterized in that: The invention comprises a dryer tank body (1), wherein a vibration jet drying treatment mechanism (5) and a microwave emission mechanism are arranged in the dryer tank body (1); a discharge port (11) at the bottom of the dryer tank body (1) is connected to a product recovery mechanism; The vibration jet drying treatment mechanism (5) includes a high-pressure jet tube (501) and a product processing platform (502); one end of the high-pressure jet tube (501) is connected to an air pump pressure supply mechanism, and the other end is connected to a plurality of high-pressure nozzles, and the product processing platform (502) is located directly below the plurality of high-pressure nozzles; the product processing platform (502) is connected to a feed conveying pipeline (2); the gas provided by the air pump pressure supply mechanism is sprayed onto the material on the product processing platform (502) through the high-pressure jet tube (501) and the high-pressure nozzles, and the material is subjected to air jet drying; the microwave emission mechanism is used to perform microwave drying on the material; The product processing platform (502) is connected to a vibration motor (504) and a processing platform angle adjustment mechanism (506); the processing platform angle adjustment mechanism (506) is used to adjust the inclination angle of the product processing platform (502) so that the material falls into the discharge port (11) at the bottom of the dryer tank (1); The high-pressure jet tube (501) is divided into three parts: upper, middle and lower. The upper part of the high-pressure jet tube is an air flow transport area (511), the middle part is an air flow buffer area (512), and the lower part is a jet tube high-pressure action area (513). The key structure of the high-pressure jet tube (501) is the jet tube high-pressure action area (513) at the lower part. The jet tube high-pressure action area (513) is composed of four rows and fourteen columns of conical high-pressure nozzles. The high-pressure nozzles are wide at the top and narrow at the bottom, and the air outlet is a narrow mouth, so that the smooth air flow forms a high-pressure air flow through the mechanical structure. The size of the product processing platform (502) is adapted to the size of the jet tube high-pressure action area (513). The product processing platform (502) is provided with a product limit baffle (521) near the mechanism connection hinge (503). The height of the product limit baffle (521) is completely close to the jet tube high-pressure action area (513); The inner wall of the dryer tank (1) is connected to a plurality of vibrating jet drying processing mechanisms (5) evenly distributed from top to bottom, each vibrating jet drying processing mechanism (5) is connected to a feed conveying pipe (2), and the plurality of feed conveying pipes (2) extend out of the top of the dryer tank (1) and are connected to a feed conveying belt (3); The feed conveyor belt (3) is divided into two sections for transportation, wherein the first section of the feed conveyor belt (301) is a low-speed transportation section, the right side of the first section of the feed conveyor belt (301) is the second section of the feed conveyor belt (302), the second section of the feed conveyor belt (302) is a high-speed transportation belt, and the right side of the second section of the feed conveyor belt (302) is connected to the feed conveying pipe (2); a gate mechanism (4) is installed on the upper side of the first section of the feed conveyor belt (301); The microwave emitting mechanism is located on the top inner wall of the dryer tank body (1) and is composed of two microwave emitters (10); the discharge port (11) is provided with a first closed valve (1101) and a second closed valve (1102); the first closed valve (1101) and the second closed valve (1102) are opened alternately to achieve the purpose of maintaining a closed environment in the dryer tank body (1) when the pulverized coal product is discharged; when the pulverized coal is discharged, the weight sensor connected to the first closed valve (1101) and the second closed valve (1102) controls the alternate opening and closing of the valves.

2. A microwave low-temperature air jet vibration dryer for coal drying according to claim 1, characterized in that: The gate knife mechanism (4) comprises a gate knife (401), a telescopic electric rod (402), and a gate knife baffle (403); the gate knife (401) is mounted on the telescopic electric rod (402), and the gate knife baffle (403) is mounted on the front end of the telescopic electric rod (402); the gate knife (401) is driven by the telescopic electric rod (402) to cut the coal slime on the first section of the feeding conveyor belt (301) into pieces.

3. The microwave low-temperature air jet vibration dryer for coal drying according to claim 1, characterized in that: A connecting hinge (503) is provided on the inner wall of the dryer tank body (1), an end of the product processing platform (502) is hinged to the connecting hinge (503), one end of the processing platform angle adjustment mechanism (506) is hinged to the connecting hinge (503), and the other end is hinged to the middle of the angle adjustment base plate (523), one end of the angle adjustment base plate (523) is hinged to the inner wall of the dryer tank body (1), and the other end is connected to the bottom end of the industrial spring (522), and the top end of the industrial spring (522) is connected to the bottom of the product processing platform (502).

4. A microwave low-temperature air jet vibration dryer for coal drying according to claim 3, characterized in that: The processing platform angle adjustment mechanism (506) is an electromagnetic telescopic rod.

5. The microwave low-temperature air jet vibration dryer for coal drying according to claim 1, characterized in that: The vibration motor (504) is fixed to the bottom of the product processing platform (502). The interior of the vibration motor (504) is a servo motor (531) composed of a stator and a rotor. A set of adjustable eccentric blocks (533) are respectively installed at both ends of the rotor shaft (532) of the servo motor. When the servo motor rotor shaft (532) rotates, the adjustable eccentric blocks (533) are driven to rotate. One end of the adjustable eccentric block (533) is fixed to the servo motor rotor shaft (532), and the other end is equipped with a counterweight block (534).

6. The microwave low-temperature air jet vibration dryer for coal drying according to claim 1, characterized in that: The air pump pressure supply mechanism is composed of an air pump (8), an air pump air storage tank (7), and an air pump pipeline (6) which are connected in sequence. A barometer (9) is installed at the connection between the air pump pipeline (6) and the air pump air storage tank (7); the air pump pipeline (6) is connected to the high-pressure jet pipe (501), and a flow meter (901) is installed at the connection between the air pump pipeline (6) and the high-pressure jet pipe (501).

7. The microwave low-temperature air jet vibration dryer for coal drying according to claim 1, characterized in that: The product recovery mechanism includes a product discharge conveyor belt (18) and a product collection area (15), wherein the feed port of the product discharge conveyor belt (18) is arranged at the bottom of the discharge port (11), and the discharge port of the product discharge conveyor belt (18) is connected to the product collection area (15); The dryer tank (1) is connected to a cyclone dust collector (14) via an air extraction pump (12) and an air extraction pump pipeline (13). The lower end of the cyclone dust collector (14) is connected to a residual product collection area (15), and the upper end of the cyclone dust collector (14) is connected to a waste dust collection area (16).

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