Pulverized coal mixing and drying device for ore pulp ash analyzer

Abstract

The utility model relates to the technical field of mixing and drying devices, and discloses a pulverized coal mixing and drying device for an ore pulp ash analyzer, which comprises a coal slime drying machine, a separation box and a crushing device, an inner-layer groove, a middle-layer groove and an outer-layer groove are arranged in the coal slime drying machine, the middle-layer groove is sleeved on the outer side of the inner-layer groove and located in the outer-layer groove, and the outer-layer groove is located in the separation box. The smashing device in the separation box is started, the driving motor drives a shaft rod of the driving smashing hammer to rotate, the driving gear on the driving smashing hammer is meshed with the driven gear, the driven gear is meshed with the middle-layer groove, the middle-layer groove is communicated with the middle-layer groove, the middle-layer groove is communicated with the middle-layer groove, and the tail end of the middle-layer groove is communicated with the middle-layer groove and the tail end of the middle-layer groove of the coal slime drying machine. And the crushing device crushes caked pulverized coal, so that the uniform particle size of the discharged material is ensured, the detection result of the ore pulp ash analyzer is prevented from being influenced by non-uniform particles, and a high-quality sample is provided for subsequent detection.

Description

A pulverized coal mixing and drying device for a pulp ash meter Technical field

[0001] The utility model relates to the technical field of mixing and drying devices, in particular to a pulverized coal mixing and drying device for a pulp ash meter. Background technique

[0002] The pulverized coal mixing and drying device supporting the pulp ash meter is a key pretreatment device in the ash detection process. Its core value lies in providing a qualified sample for detection through efficient drying, uniform mixing, and particle size control, thereby improving the accuracy and timeliness of ash data. Its operating principle: The pulverized coal drying device consists of a feeder, a heat source, a coal slime dryer, a cyclone discharger, and an induced draft fan to work together for drying and feeding. The feeder sends wet pulverized coal into the inlet of the dryer, and at the same time, the high-temperature hot air flow generated by the heat source enters the dryer interior synchronously. The pulverized coal is lifted or fluidized by the scraper plate and fully mixed with the hot air flow. The hot air flow transfers heat to the pulverized coal, causing its moisture to evaporate into water vapor, forming a gas-solid mixed flow of "pulverized coal + wet steam". The induced draft fan uses the air flow power to push the mixed flow forward (in the co-current or counter-current direction), ensuring that the pulverized coal has enough residence time in the dryer to complete drying. After the mixed flow enters the cyclone discharger, the pulverized coal (heavy particles) is thrown to the wall of the device by centrifugal force and slides to the discharge port to complete discharging. The air flow containing wet steam is discharged from the top, and the induced draft fan introduces the tail gas (containing a small amount of dust) into the dust collector for purification, and after reaching the standard, it is discharged or the waste heat is recovered (part of the heat can be returned to the heat source for reuse).

[0003] The existing pulverized coal mixing and drying devices work together through a closed-loop process of "feeding → heating and drying → separation → tail gas treatment" to achieve efficient drying of wet pulverized coal. At the same time, through the air flow regulation of the induced draft fan and the physical separation of the cyclone separator, the drying efficiency and system stability are ensured. However, the coal blocks are thrown to the wall of the device by centrifugal force and slide to the discharge port for feeding, and the coal blocks cannot be thoroughly pulverized, which is not conducive to the pulverized detection of the mixed coal slime by the pulp ash meter. Summary of the invention

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, and a pulverized coal mixing and drying device for a pulp ash meter is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A coal powder mixing and drying device for a slurry ash analyzer includes a coal slime dryer, a separation box, and a crushing device. The coal slime dryer has an inner trough, a middle trough, and an outer trough. The middle trough is fitted outside the inner trough and located inside the outer trough. The beginning and end of the middle trough are connected to the middle trough and the outer trough, respectively. The tail ends of the inner and middle troughs of the coal slime dryer are inserted into the separation box. The tail end of the outer casing of the coal slime dryer is fixedly connected to the outer wall of the separation box. The crushing device is fixedly installed inside the separation box and is located at the bottom of the middle trough of the coal slime dryer. The crushing device includes... The separation chamber includes an active crushing hammer, a driven crushing hammer, an active gear, a driven gear, and a drive motor. The two ends of the active and driven crushing hammers are rotatably connected to the inner wall of the separation chamber. The active and driven gears are respectively fixedly connected to one end of the active and driven crushing hammers. The active and driven gears are located on the outer wall of the separation chamber and mesh with each other. The drive motor is fixedly connected to the horizontal plate on the outer wall of the separation chamber. The output end of the drive motor is fixedly connected to the shaft of the active crushing hammer and is located on one side of the active gear.

[0007] As a further embodiment of this utility model, the bottom of the active crushing hammer is provided with a vibrating screen plate, which is fixedly connected to the inner wall of the separation box in an inclined manner. A first discharge pipe is integrally connected to the outer side of the separation box. The first discharge pipe communicates with the interior of the separation box and is located at the lowest inclined end of the vibrating screen plate. A particle collection box is provided on the outer side of the separation box. The particle collection box is located at the bottom of the first discharge pipe. A straight discharge port is opened through the bottom side of the separation box. A dust box A is provided at the bottom of the vibrating screen plate.

[0008] As a further embodiment of this utility model, the dust box A is inserted into the direct discharge port, and a bin wall vibrator B is fixedly connected to the side of the separation box away from the first discharge pipe. The separation box has a feed inlet on the side near the drive motor, and a hopper is provided on the top of the drive motor. The hopper is fixedly connected to the outer wall of the separation box, and the feed inlet communicates with the inside of the hopper. A limiting plate is fixedly connected to one side of the top of the hopper, and sliding grooves are provided on the inner side of the limiting plate and the outer wall of the separation box. A hopper cover is movably installed on the top of the hopper.

[0009] As a further embodiment of this utility model, the hopper cover is located between the separation box and the limiting plate. Sliding columns are fixedly connected to both sides of one end of the hopper cover. The sliding columns drive the hopper cover to slide in the sliding groove. A frame is provided on the top of the particle collection box. The frame is fixedly connected to the outer wall of the separation box. A support frame and a cyclone unloader are provided on the top of the frame. The cyclone unloader is fixedly connected to the support frame. A dust box B is provided at the bottom of the cyclone unloader. The dust box B is located on the top of the frame. One side of the support frame is fixedly connected to the separation box.

[0010] As a further embodiment of this utility model, a blower is provided on one side of the cyclone unloader and is fixedly installed on the top of the support frame. The exhaust pipe of the blower is fixedly connected to the top of the cyclone unloader. The tail end of the outer pipe at the top of the cyclone unloader is fixedly connected to the top of the separation box. A mixing tank is provided on one side of the separation box. The mixing tank includes a stirrer, a drive motor and a discharge pipe. The shaft of the stirrer is rotatably connected to the top cover of the mixing tank. The drive motor is fixedly connected to the top cover of the mixing tank.

[0011] As a further embodiment of this utility model, the output end of the drive motor is fixedly connected to the shaft of the agitator, the agitator is located inside the mixing tank, the discharge pipe is integrally connected to the bottom of the mixing tank, an electric control valve is fixedly connected to the outer wall of the discharge pipe, a bin wall vibrator A is fixedly connected to the outer wall of the mixing tank, the mixing tank is located at the top of the coal slime dryer, the discharge pipe is fixedly connected to the feed pipe of the coal slime dryer by bolts, a hot air chamber is fixedly connected to the end of the coal slime dryer away from the separation box, an air inlet pipe is fixedly connected to the outer side of the hot air chamber, and the hot air chamber is interconnected with the coal slime dryer.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The coal slime dryer adopts a three-layer structure: inner, middle, and outer. The middle layer trough connects the outer and inner layers, forming a hot air circulation channel. Coal slime enters from the inner layer trough, and the high-temperature hot airflow generated by the heat source simultaneously enters the inner layer trough of the dryer. Inside the dryer, coal powder is lifted or fluidized by the lifting plates, and fully mixed and contacted with the hot airflow. The hot airflow transfers heat to the coal powder, causing its moisture to evaporate into water vapor. The dried coal lumps are pushed out of the outer layer trough by the airflow and fall into the separation box. The layered drying structure extends the contact path between the hot air and the coal slime, improves the heat exchange efficiency, and ensures that the coal slime is fully dried and agglomerated. The crushing device in the separation box is activated, and the drive motor drives the shaft of the active crushing hammer to rotate. The active gear on the active crushing hammer meshes with the driven gear, causing the driven crushing hammer to rotate in the opposite direction, crushing the coal lumps. The crushing device breaks up the agglomerated coal powder, ensuring uniform particle size of the output and avoiding the impact of uneven particle size on the slurry ash content analyzer test results, thus providing high-quality samples for subsequent testing.

[0014] 2. The pulverized coal falls onto an inclined vibrating screen plate. The vibration of the screen plate causes the coal to be screened. Smaller particles pass through the screen holes and fall into dust box A through the direct discharge port at the bottom of the separation box. Larger particles slide along the inclined surface of the screen plate and enter the particle collection box from the first discharge pipe. This achieves precise particle size classification of the coal, avoids the accumulation of fine powder in the separation box, which affects the operation of the equipment, and improves the stability of the device. The bin wall vibrator B periodically vibrates the wall of the separation box to prevent coal powder from adhering to the inner wall of the separation box. After the granular coal blocks enter the particle collection box, they are poured into the hopper by workers. From the hopper, they enter the separation box through the feed inlet for secondary crushing and grinding, so that the coal blocks are completely crushed into powder, which is convenient for the slurry ash analyzer to detect the coal powder. Attached Figure Description

[0015] Figure 1 is a three-dimensional structural schematic diagram of a coal powder mixing and drying device for a slurry ash analyzer proposed in this utility model;

[0016] Figure 2 is a schematic diagram of the disassembled structure of a coal powder mixing and drying device for a slurry ash analyzer proposed in this utility model;

[0017] Figure 3 is a schematic diagram of the disassembled structure of the crushing device in the coal powder mixing and drying device for a slurry ash analyzer proposed in this utility model.

[0018] Figure 4 is a schematic diagram of the internal structure of the separation box of a coal powder mixing and drying device for a slurry ash analyzer proposed in this utility model.

[0019] Figure 5 is a schematic diagram of the hopper structure of a coal powder mixing and drying device for a slurry ash analyzer proposed in this utility model.

[0020] In the diagram: 1. Coal slime dryer; 101. Hot air chamber; 102. Air inlet pipe; 2. Mixing tank; 201. Agitator; 202. Drive motor; 203. Feed pipe; 205. Electrically controlled valve; 204. Bin wall vibrator A; 3. Separation box; 301. Feed inlet; 302. Vibrating screen plate; 303. First discharge pipe; 304. Direct discharge port; 305. Bin wall vibrator B; 4. Crushing device; 401. Active crushing hammer; 402. Driven crushing hammer; 403. Drive gear; 404. Driven gear; 405. Drive motor; 5. Dust box A; 6. Particle collection box; 7. Hopper; 701. Limiting plate; 702. Hopper cover; 703. Sliding column; 8. Slide chute; 9. Frame; 901. Dust box B; 10. Support frame; 11. Cyclone unloader; 12. Exhaust fan. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Referring to Figures 1-5, a coal powder mixing and drying device for a slurry ash analyzer includes a coal slime dryer 1, a separation box 3, and a crushing device 4. The coal slime dryer 1 has an inner trough, a middle trough, and an outer trough inside. The middle trough is fitted outside the inner trough and located inside the outer trough. The beginning and end of the middle trough are connected to the outer trough, respectively. The tail ends of the inner and middle troughs of the coal slime dryer 1 are inserted into the separation box 3. The tail end of the outer casing of the coal slime dryer 1 is fixedly connected to the outer wall of the separation box 3. The crushing device 4 is fixedly installed inside the separation box 3, located at the bottom of the middle trough of the coal slime dryer 1. The crushing device 4 includes an active crushing hammer 401, a driven crushing hammer 402, and a main crushing hammer 403. The driving gear 403, driven gear 404, and drive motor 405 are connected to the inner wall of the separation box 3 by the shafts at both ends of the driving hammer 401 and driven hammer 402. The driving gear 403 and driven gear 404 are respectively fixedly connected to one end of the shafts of the driving hammer 401 and driven hammer 402. The driving gear 403 and driven gear 404 are both located on the outer wall of the separation box 3 and mesh with each other. The drive motor 405 is fixedly connected to the horizontal plate of the outer wall of the separation box 3. The output end of the drive motor 405 is fixedly connected to the shaft of the driving hammer 401. The drive motor 405 is located on one side of the driving gear 403.

[0025] In use, the coal slime dryer 1 adopts a three-layer structure: inner, middle, and outer. The middle layer trough connects the outer and inner layers, forming a hot air circulation channel. The coal slime enters from the inner layer trough, and the high-temperature hot airflow generated by the heat source simultaneously enters the inner layer trough of the dryer. Inside the dryer, the coal powder is lifted or fluidized by the lifting plates and fully mixed and contacted with the hot airflow. The hot airflow transfers heat to the coal powder, causing its moisture to evaporate into water vapor. The dried coal blocks are pushed out of the outer layer trough by the airflow and fall into the separation box 3. The layered drying structure extends the contact path between the hot air and the coal slime, improves the heat exchange efficiency, and ensures that the coal slime is fully dried and agglomerated. The crushing device 4 in the separation box 3 is activated, and the drive motor 405 drives the shaft of the active crushing hammer 401 to rotate. The active gear 403 on the active crushing hammer 401 meshes with the driven gear 404, causing the driven crushing hammer 402 to rotate in the opposite direction, crushing the coal blocks. The crushing device 4 crushes the agglomerated coal powder, ensuring uniform particle size of the output and avoiding the impact of uneven particle size on the slurry ash content analyzer test results, thus providing high-quality samples for subsequent testing.

[0026] In this embodiment, the active crushing hammer 401 is provided with a vibrating screen plate 302 at the bottom. The vibrating screen plate 302 is fixedly connected to the inner wall of the separation box 3 in an inclined shape. The first discharge pipe 303 is integrally connected to the outer side of the separation box 3. The first discharge pipe 303 communicates with the interior of the separation box 3 and is located at the lowest inclined end of the vibrating screen plate 302. A particle collection box 6 is provided on the outer side of the separation box 3. The particle collection box 6 is located at the bottom of the first discharge pipe 303. A straight discharge port 304 is opened through the interior of the bottom side of the separation box 3. A dust box A5 is provided at the bottom of the vibrating screen plate 302.

[0027] During use, the pulverized coal powder falls onto the inclined vibrating screen plate 302. The vibration of the vibrating screen plate 302 causes the coal powder to be screened. The smaller coal powder particles pass through the screen holes and fall into the dust box A5 through the straight discharge port 304 at the bottom of the separation box 3. The larger coal powder particles slide along the inclined surface of the vibrating screen plate 302 and enter the particle collection box 6 from the first discharge pipe 303. This achieves accurate particle size classification of coal powder, avoids the accumulation of fine powder in the separation box 3, which affects the operation of the equipment, and improves the stability of the device operation.

[0028] In this embodiment, the dust box A5 is inserted into the direct discharge port 304. The side of the separation box 3 away from the first discharge pipe 303 is fixedly connected to the silo vibrator B305. The side of the separation box 3 near the drive motor 405 has a feed inlet 301. The top of the drive motor 405 is provided with a hopper 7. The hopper 7 is fixedly connected to the outer wall of the separation box 3. The feed inlet 301 communicates with the inside of the hopper 7. A limiting plate 701 is fixedly connected to one side of the top of the hopper 7. The inner side of the limiting plate 701 and the outer wall of the separation box 3 are both provided with sliding grooves 8. A hopper cover 702 is movably installed on the top of the hopper 7.

[0029] During use, the B305 vibrator periodically vibrates the wall of the separation box 3 to prevent coal powder from adhering to the inner wall of the separation box 3. After the granular coal blocks enter the particle collection box 6, they are uniformly poured into the hopper 7 by the workers. From the hopper 7, they enter the separation box 3 through the feed inlet 301 for secondary crushing and grinding, so that the coal blocks are completely crushed into powder, which is convenient for the slurry ash analyzer to detect the coal powder.

[0030] In this embodiment, the hopper cover 702 is located between the separation box 3 and the limiting plate 701. Sliding columns 703 are fixedly connected to both sides of one end of the hopper cover 702. The sliding columns 703 drive the hopper cover 702 to slide in the sliding groove 8. The top of the particle collection box 6 is provided with a frame 9, which is fixedly connected to the outer wall of the separation box 3. The top of the frame 9 is provided with a support frame 10 and a cyclone unloader 11. The cyclone unloader 11 is fixedly connected to the support frame 10. The bottom of the cyclone unloader 11 is provided with a dust box B901, which is located at the top of the frame 9. One side of the support frame 10 is fixedly connected to the separation box 3.

[0031] In use, push the bucket cover 702. The bucket cover 702 drives the sliding column 703 to slide in the chute 8. When it slides to the end of the limit plate 701, the sliding column 703 falls down and hooks onto the bottom of the chute 8. At the same time, the bucket cover 702 rotates 90° and fits against the outer wall of the hopper 7. It is opened when feeding and closed after feeding to seal and prevent dust. The hot air discharged from the coal slime dryer 1 enters the separation box 3. At the same time, some of the coal dust crushed by the crushing device 4 is pulled up with the hot air. The hot air carries the dust up into the cyclone unloader 11. Centrifugal force is used to separate the fine powder from the gas. The fine powder falls into the dust box B901 below, and the gas is discharged from the top. The cyclone unloader 11 achieves efficient gas-solid separation, secondary recovery of the fine powder entrained in the crushing process, reduces material loss, improves coal powder utilization, and reduces the pressure on subsequent dust removal equipment.

[0032] In this embodiment, a blower 12 is provided on one side of the cyclone unloader and is fixedly installed on the top of the support frame 10. The exhaust pipe of the blower 12 is fixedly connected to the top of the cyclone unloader. The tail end of the outer pipe at the top of the cyclone unloader is fixedly connected to the top of the separation box. A mixing tank 2 is provided on one side of the separation box 3. The mixing tank 2 includes a stirrer 201, a drive motor 202 and a discharge pipe 203. The shaft of the stirrer 201 is rotatably connected to the top cover of the mixing tank 2. The drive motor 405 is fixedly connected to the top cover of the mixing tank.

[0033] In use, the induced draft fan 12 is connected to the top of the cyclone unloader 11 through the exhaust pipe. When running, it generates negative pressure, which drives the flow of hot air in the drying system and discharges the exhaust gas separated by the cyclone unloader 11. The induced draft fan 12 maintains the airflow pressure balance of the drying system, ensures stable flow of hot air, and ensures that the drying process is carried out continuously and efficiently. The drive motor 202 in the mixing tank 2 drives the agitator 201 to rotate, which stirs and mixes the material entering the mixing tank 2. The electric control valve 204 on the discharge pipe 203 controls the material discharge. The mixing tank 2 achieves uniform mixing of materials, making the coal powder composition uniform, meeting the strict requirements of the slurry ash analyzer for the test samples, and improving the accuracy of the test.

[0034] In this embodiment, the output end of the drive motor 202 is fixedly connected to the shaft of the agitator 201. The agitator 201 is located inside the mixing tank 2. The feed pipe 203 is integrally connected to the bottom of the mixing tank 2. An electric control valve 204 is fixedly connected to the outer wall of the feed pipe 203. A bin wall vibrator A205 is fixedly connected to the outer wall of the mixing tank 2. The mixing tank 2 is located at the top of the coal slime dryer 1. The feed pipe 203 is fixedly connected to the feed pipe of the coal slime dryer 1 by bolts. A hot air chamber 101 is fixedly connected to the end of the coal slime dryer 1 away from the separation box 3. An air inlet pipe 102 is fixedly connected to the outer side of the hot air chamber 101. The hot air chamber 101 is interconnected with the coal slime dryer 1.

[0035] During use, the silo vibrator A205 is installed on the outer wall of the mixing tank 2 to vibrate the wall of the mixing tank 2, preventing the sticky coal slime from adhering and ensuring smooth mixing and feeding. The coal slime inside the mixing tank 2 enters the coal slime dryer 1. At the same time, the air inlet pipe 102 introduces high-temperature hot air generated by an external heat source, which is evenly distributed to the inner, middle and outer troughs of the coal slime dryer 1 through the hot air chamber 101. Meanwhile, the hot air is pulled by the induced draft fan 12 to push the dried coal blocks out of the outer trough and into the separation box 3.

[0036] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: The coal slime dryer 1 adopts an inner, middle, and outer three-layer structure. The middle layer trough is connected to the outer layer trough and the inner layer trough at both ends, forming a hot air circulation channel. The coal slime enters from the inner layer trough, and the high-temperature hot airflow generated by the heat source enters the inner layer trough of the dryer simultaneously. Inside the dryer, the coal powder is lifted or fluidized by the lifting plates and fully mixed and contacted with the hot airflow. The hot airflow transfers heat to the coal powder, causing its moisture to evaporate into water vapor. The dried coal blocks are pushed out of the outer layer trough by the airflow and fall into the separation box 3. The layered drying structure extends the contact path between the hot air and the coal slime, improves the heat exchange efficiency, and ensures that the coal slime is fully dried and solidified into blocks. The crushing device 4 in the separation box 3 is started, and the drive motor 405 drives the shaft of the active crushing hammer 401 to rotate. The active gear 403 on the active crushing hammer 401 meshes with the driven gear 404, causing the driven crushing hammer 402 to rotate in the opposite direction and crush the coal blocks. The coal powder is crushed and agglomerated to ensure uniform particle size of the output, avoiding the impact of uneven particle size on the ash content analyzer test results, and providing high-quality samples for subsequent testing. The hot air discharged from the coal slime dryer 1 enters the separation box 3. At the same time, some of the coal dust crushed by the crushing device 4 is pulled up with the hot air. The hot air carries the dust up into the cyclone discharger 11, where centrifugal force separates the fine powder from the gas. The fine powder falls into the dust box B901 below, and the gas is discharged from the top. The cyclone discharger 11 achieves efficient gas-solid separation, secondary recovery of the fine powder entrained during the crushing process, reduces material loss, improves coal powder utilization, and reduces the pressure on subsequent dust removal equipment. The induced draft fan 12 is connected to the top of the cyclone discharger 11 through the exhaust pipe. When running, it generates negative pressure, drives the flow of hot air in the drying system, and discharges the waste gas separated by the cyclone discharger 11. The induced draft fan 12 maintains the airflow pressure balance of the drying system, ensures stable flow of hot air, and ensures continuous and efficient drying process.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A coal powder mixing and drying device for a slurry ash analyzer, comprising a coal slime dryer (1), a separation box (3), and a crushing device (4), characterized in that, The coal slime dryer (1) has an inner trough, a middle trough, and an outer trough inside. The middle trough is fitted outside the inner trough and located inside the outer trough. The beginning and end of the middle trough are connected to the middle trough and the outer trough, respectively. The tail ends of the inner trough and the middle trough of the coal slime dryer (1) are inserted into the separation box (3). The tail end of the outer casing of the coal slime dryer (1) is fixedly connected to the outer wall of the separation box (3). The crushing device (4) is fixedly installed inside the separation box (3). The crushing device (4) is located at the bottom of the middle trough of the coal slime dryer (1). The crushing device (4) includes an active crushing hammer (401), a driven crushing hammer (402), an active gear (403), a driven gear (404), and a drive motor (405). The two ends of the crusher (401) and the driven crusher (402) are rotatably connected to the inner wall of the separator (3). The driving gear (403) and the driven gear (404) are respectively fixedly connected to one end of the shaft of the driving crusher (401) and the driven crusher (402). The driving gear (403) and the driven gear (404) are both located on the outer wall of the separator (3). The driving gear (403) and the driven gear (404) mesh with each other. The drive motor (405) is fixedly connected to the horizontal plate of the outer wall of the separator (3). The output end of the drive motor (405) is fixedly connected to the shaft of the driving crusher (401). The drive motor (405) is located on one side of the driving gear (403).

2. The coal powder mixing and drying device for a slurry ash analyzer according to claim 1, characterized in that, The active crushing hammer (401) is provided with a vibrating screen plate (302) at the bottom. The vibrating screen plate (302) is fixedly connected to the inner wall of the separation box (3) in an inclined shape. The first discharge pipe (303) is integrally connected to the outer side of the separation box (3). The first discharge pipe (303) connects to the interior of the separation box (3) and is located at the lowest inclined end of the vibrating screen plate (302). A particle collection box (6) is provided on the outer side of the separation box (3). The particle collection box (6) is located at the bottom of the first discharge pipe (303). A straight discharge port (304) is opened through the interior of the bottom side of the separation box (3). A dust box A (5) is provided at the bottom of the vibrating screen plate (302).

3. The coal powder mixing and drying device for a slurry ash analyzer according to claim 2, characterized in that, The dust box A (5) is inserted into the straight discharge port (304). The separation box (3) is fixedly connected to the side away from the first discharge pipe (303) with a bin wall vibrator B (305). The separation box (3) has a feed inlet (301) on the side near the drive motor (405). The drive motor (405) has a hopper (7) on top. The hopper (7) is fixedly connected to the outer wall of the separation box (3). The feed inlet (301) communicates with the inside of the hopper (7). A limiting plate (701) is fixedly connected to one side of the top of the hopper (7). The inner side of the limiting plate (701) and the outer wall of the separation box (3) are both provided with sliding grooves (8). The top of the hopper (7) is movably installed with a hopper cover (702).

4. A coal powder mixing and drying device for a slurry ash analyzer according to claim 3, characterized in that, The hopper cover (702) is located between the separation box (3) and the limiting plate (701). Sliding columns (703) are fixedly connected to both sides of one end of the hopper cover (702). The sliding columns (703) drive the hopper cover (702) to slide in the sliding groove (8). The top of the particle collection box (6) is provided with a frame (9). The frame (9) is fixedly connected to the outer wall of the separation box (3). The top of the frame (9) is provided with a support frame (10) and a cyclone unloader (11). The cyclone unloader (11) is fixedly connected to the support frame (10). The bottom of the cyclone unloader (11) is provided with a dust box B (901). The dust box B (901) is located at the top of the frame (9). One side of the support frame (10) is fixedly connected to the separation box (3).

5. A coal powder mixing and drying device for a slurry ash analyzer according to claim 4, characterized in that, The cyclone unloader (11) is provided with an induced draft fan (12) on one side and is fixedly installed on the top of the support frame (10). The exhaust pipe of the induced draft fan (12) is fixedly connected to the top of the cyclone unloader. The tail end of the outer pipe at the top of the cyclone unloader is fixedly connected to the top of the separation box. The separation box (3) is provided with a mixing tank (2) on one side. The mixing tank (2) includes a stirrer (201), a drive motor (202) and a discharge pipe (203). The shaft of the stirrer (201) is rotatably connected to the top cover of the mixing tank (2). The drive motor (405) is fixedly connected to the top cover of the mixing tank (2).

6. A coal powder mixing and drying device for a slurry ash analyzer according to claim 5, characterized in that, The output end of the drive motor (202) is fixedly connected to the shaft of the agitator (201). The agitator (201) is located inside the mixing tank (2). The feed pipe (203) is integrally connected to the bottom of the mixing tank (2). An electric control valve (204) is fixedly connected to the outer wall of the feed pipe (203). A bin wall vibrator A (205) is fixedly connected to the outer wall of the mixing tank (2). The mixing tank (2) is located at the top of the coal slime dryer (1). The feed pipe (203) is fixedly connected to the feed pipe of the coal slime dryer (1) by bolts. A hot air chamber (101) is fixedly connected to the end of the coal slime dryer (1) away from the separation box (3). An air inlet pipe (102) is fixedly connected to the outer side of the hot air chamber (101). The hot air chamber (101) is connected to the coal slime dryer (1).

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