A wear-resistant repair material feeding device and method for CFB circulating fluidized bed

Abstract

The present invention discloses a feeding device and method for wear-resistant repair material for a circulating fluidized bed (CFB), relating to the technical field of circulating fluidized bed repair. The device comprises a crushing barrel, a stirring and kneading assembly connected to the crushing barrel via a detachable feeding pipe, and a molding die connected to the stirring and kneading assembly via a detachable discharge pipe. The stirring and kneading assembly comprises two symmetrically arranged kneading barrels, with two mixing augers symmetrically arranged between the two kneading barrels. The method comprises the following steps: S1, crushing; S2, primary stirring and kneading; S3, secondary stirring and kneading; and S4, molding. The present invention optimizes the stirring and kneading assembly in response to the preparation process and performance of circulating fluidized bed repair material, further improving the mixing effect. Material can be added while mixing, and uniform mixing can be achieved by alternating the materials in the two mixing barrels, thereby improving the mixing effect and further increasing the strength of the repair material.

Description

Technical Field

[0001] The invention relates to the technical field of circulating fluidized bed repair, and in particular to a wear-resistant repair material feeding device and method for a CFB circulating fluidized bed. Background Art

[0002] CFB (Circulating Fluidized Bed) boilers utilize the most advanced clean coal combustion technology. They employ fluidized combustion, and their primary structure consists of a combustion chamber (including dense and dilute phase zones) and a circulating recirculation furnace (including a high-temperature gas-solid separator and return system). The key difference from bubbling fluidized bed combustion technology is the high operating wind speed, which intensifies heterogeneous reaction processes such as combustion and desulfurization. This allows for expansion of boiler capacity to a level acceptable to the power industry (600MW or above). CFB boilers have effectively addressed fundamental issues in thermodynamics, mechanics, and materials science, as well as engineering challenges such as expansion, wear, and overheating, making them an advanced technology for the energy utilization of difficult-to-burn solid fuels (such as coal gangue, oil shale, municipal solids, sludge, and other wastes).

[0003] During the use of the CFB circulating fluidized bed, the fluidized particles move at high speed and scour the water-cooled wall, which may cause the water-cooled wall or furnace wall to become thinner or produce local grooves, or even leakage. Therefore, it is necessary to promptly repair the water-cooled wall or furnace wall inside the circulating fluidized bed. Currently, the most commonly used repair methods are surfacing or pouring refractory repair materials.

[0004] However, in the prior art, the patching material is generally prepared and then transported to the vicinity of the circulating fluidized bed, and the preparation method and device adopt the traditional concrete preparation method. There are few dedicated preparation and feeding devices for circulating fluidized bed patching materials. Summary of the Invention

[0005] In view of the above problems, the present invention provides a device and method for feeding wear-resistant repair material for a CFB circulating fluidized bed.

[0006] The technical solution of the present invention is:

[0007] A feeding device for wear-resistant repair material for a CFB circulating fluidized bed, comprising a crushing barrel, a stirring and mixing assembly connected to the crushing barrel via a detachable feeding pipe, and a forming die connected to the stirring and mixing assembly via a detachable feeding pipe;

[0008] The stirring and kneading assembly includes two symmetrically arranged kneading barrels, two kneading augers are symmetrically arranged between the two kneading barrels, a fixed rod is provided in the middle of the two kneading barrels and passes through the interior thereof, the fixed rod is rotatably connected to the two kneading barrels, a plurality of stirring rods are equidistantly arranged around the outer wall of the fixed rod at positions corresponding to the interior of the two kneading barrels, a drive assembly for driving the two kneading barrels to rotate synchronously is provided on one side of the stirring and kneading assembly, a circle of tooth grooves are provided on the outer walls of the two kneading barrels on opposite sides, and the tooth grooves are respectively meshed and connected with two driving gears provided in the drive assembly;

[0009] A driving motor is provided at the outer center of one of the driving gears, a fixed block is provided at the outer center of the other driving gear, a connecting rod is fixed at the centers of the two driving gears, one end of the connecting rod is connected to the output end of the driving motor, and the other end of the connecting rod is rotatably connected to the fixed block, and a first auxiliary gear and a second auxiliary gear are symmetrically provided on both sides of the middle part of the connecting rod for controlling the rotation of the two mixing augers respectively, the first auxiliary gear and the second auxiliary gear are periodically meshed and connected with the strip grooves provided on the outer walls of the two mixing augers respectively, and the mixing augers are rotatably engaged with the inner and outer walls of the two mixing barrels, so that the mixing augers and the mixing barrels rotate synchronously while completing periodic self-rotation by periodically meshing with the first auxiliary gear or the second auxiliary gear.

[0010] Furthermore, a fixing platform is provided at each end of the fixing rod, the driving motor and the fixing block are symmetrically arranged, and supporting legs are provided at the bottom of the driving motor and the fixing block.

[0011] Note: The stable operation of the entire device is ensured by the setting of the fixed platform and support legs.

[0012] Furthermore, the number of the stirring rods is 5 to 9, and the mixing barrel corresponding to the rear side of the tooth groove is hemispherical.

[0013] Note: The structure and shape of the mixing barrel are set to make it more compatible with the stirring and mixing components.

[0014] Furthermore, a feed port is provided on the inner outer wall of one of the mixing barrels, and a discharge port is provided on the inner outer wall of the other mixing barrel. The feed port is detachably connected to the feeding pipe, and the discharge port is detachably connected to the discharge pipe.

[0015] Note: The feeding and discharging are completed by setting the feeding port and the discharging port. The feeding port and the discharging port are kept sealed during operation.

[0016] Furthermore, the first auxiliary gear and the second auxiliary gear are movably connected by a telescopic rod and a spring, the telescopic rod and the spring are symmetrically arranged about the connecting rod, the first auxiliary gear is fixed to the connecting rod, the second auxiliary gear is slidingly arranged to the connecting rod, and the inner edge of the second auxiliary gear is provided with a step surface, the fixed block and the top of the driving motor are both provided with a fixed plate, a threaded rod is provided between the two fixed plates, the middle threaded connecting sleeve of the threaded rod is provided with a threaded connecting block, the external rotating connecting sleeve of the threaded connecting block is provided with a limit plate, the limit plate is aligned with the step surface for limiting the second auxiliary gear, the top of the two fixed plates is provided with a limit rod, and the limit rod is slidably connected to the groove provided at the center of the top of the limit plate.

[0017] Description: The two auxiliary gears can be used to rotate the two mixing augers, and the threaded connection block and the limit plate can be used to make one of the auxiliary gears slide and shift, separate from the strip groove, and stop the rotation of one mixing augers, thereby achieving the purpose of one-way feeding.

[0018] Furthermore, the limiting plate is rotatably connected to a limiting groove provided on the outer wall of the threaded connection block.

[0019] Note: The setting of the limiting groove enables the limiting plate and the threaded connection block to rotate relative to each other and maintain the limit on the step surface.

[0020] Furthermore, a conveying rod is provided in the middle part of the mixing auger, and a spiral conveying blade is provided on the conveying rod, each of the conveying blades is fixedly connected to the inner wall of the mixing auger, and a first clamping ring is provided at both ends of the mixing auger, and the first clamping ring is rotatably connected to the first clamping groove provided on the inner outer wall of the mixing barrel, and a second clamping ring is provided on the outer wall of the fixed rod corresponding to the outer inner wall of the mixing barrel, and the second clamping ring is rotatably connected to the second clamping groove provided on the outer inner wall of the mixing barrel.

[0021] Description: The internal structure of the mixing auger enables it to transport materials alternately in the two mixing barrels, thereby improving the stirring and mixing effect.

[0022] A method for feeding wear-resistant repair material for a CFB circulating fluidized bed using any one of the feeding devices described above comprises the following steps:

[0023] S1. Crushing: Aggregates and admixtures are placed in a crushing barrel for crushing, and then the crushed aggregates and admixtures are fed into a mixing barrel of a stirring and mixing assembly through a feeding pipe;

[0024] S2. Primary stirring and mixing: adding phosphoric acid solution into the mixing barrel, turning on the drive motor to drive the connecting rod and two driving gears to rotate, thereby driving the two mixing barrels to rotate under the meshing action of the driving gears and the tooth grooves, and the fixed rod and the stirring rod are always kept fixed during the rotation of the mixing barrel, so that the stirring rod completes the stirring and mixing of the aggregate and the admixture to obtain a primary mixed material, and the primary mixed material is allowed to stand in the mixing barrel for 16 to 24 hours;

[0025] S3. Secondary stirring and mixing: continue to add phosphoric acid solution and coagulant into the mixing barrel, turn on the drive motor to drive the connecting rod and the two drive gears as well as the first auxiliary gear and the second auxiliary gear to rotate synchronously, and whenever the two mixing augers rotate to the position of the first auxiliary gear or the second auxiliary gear, the mixing augers are periodically meshed with the first auxiliary gear or the second auxiliary gear to complete periodic rotation. The stirring and mixing time is 1 to 2 hours to obtain a secondary mixed material;

[0026] S4. Molding: The secondary mixed material is introduced into the molding die through the feeding pipe, and after vibration molding, the mold is demoulded and dried to obtain the wear-resistant repair material for the circulating fluidized bed, and the wear-resistant repair material for the circulating fluidized bed is sent into the circulating fluidized bed for repairing the designated position.

[0027] Furthermore, the mass concentration of the phosphoric acid solution is 45-55%, the coagulant is alumina cement, and the weight ratio of the aggregate, the admixture, the phosphoric acid solution added during the first stirring and mixing, the phosphoric acid solution added during the second stirring and mixing, and the coagulant is: 60-70:30-40:3-5:7-10:1-3. The rotation speed of the mixing barrel in steps S2 and S3 is 40-80 rpm, and the rotation angle of the mixing auger is 120°-180° whenever the mixing auger is engaged with the first auxiliary gear or the second auxiliary gear.

[0028] Note: By optimizing the ratio of the raw materials of the repair material and the mixing speed, the mixing effect is improved, thereby further improving the strength of the repair material.

[0029] The beneficial effects of the present invention are:

[0030] (1) The wear-resistant repair material feeding device for a CFB circulating fluidized bed of the present invention is optimized with a stirring and mixing component according to the preparation process and performance of the circulating fluidized bed repair material. It can not only achieve sufficient mixing of multiple materials, but also achieve alternating conveying of materials in two mixing barrels during mixing, thereby further improving the mixing effect. It can add materials during mixing and achieve the purpose of uniform mixing by alternating conveying of materials in two mixing barrels, thereby improving the mixing effect and further improving the strength of the repair material.

[0031] (2) The wear-resistant repair material feeding device for the CFB circulating fluidized bed of the present invention can complete the rotation of two mixing augers through the setting of two auxiliary gears, and can make one of the auxiliary gears slide and shift through the setting of the threaded connection block and the limit plate, separate from the strip groove and stop controlling the rotation of one mixing augers, thereby achieving the purpose of one-way feeding.

[0032] (3) The method for feeding wear-resistant repair material for a CFB circulating fluidized bed of the present invention is based on the device of the present invention, provides a detailed process flow, and provides a mixing method of primary stirring and mixing and secondary stirring and mixing for the structural arrangement of two mixing barrels, a mixing auger, and a driving assembly, thereby preparing a repair material with excellent performance, thereby further improving the strength of the repair material. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the overall structure of the wear-resistant repair material feeding device for a CFB circulating fluidized bed of the present invention;

[0034] Figure 2 This is a schematic structural diagram of a stirring and mixing assembly in a wear-resistant repair material feeding device for a CFB circulating fluidized bed according to the present invention;

[0035] Figure 3 This is a schematic diagram of the connection structure between the first auxiliary gear and the second auxiliary gear in the wear-resistant repair material feeding device for a CFB circulating fluidized bed of the present invention;

[0036] Figure 4 This is a schematic diagram of the internal structure of the mixing barrel of the wear-resistant repair material feeding device for the CFB circulating fluidized bed of the present invention and the connection structure with the mixing auger;

[0037] Figure 5 This is a cross-sectional view of the interior of a mixing barrel in a wear-resistant repair material feeding device for a CFB circulating fluidized bed according to the present invention;

[0038] Figure 6 It is a schematic diagram of the second auxiliary gear and the strip groove after the limit plate is displaced in the wear-resistant repair material feeding device for a CFB circulating fluidized bed of the present invention;

[0039] Figure 7 This is a front view of a limit plate of a wear-resistant repair material feeding device for a CFB circulating fluidized bed according to the present invention;

[0040] Figure 8 The present invention is a flow chart of a method for feeding wear-resistant repair material for a CFB circulating fluidized bed.

[0041] Among them, 1-crushing barrel, 11-feeding pipe, 2-stirring and mixing assembly, 21-mixing barrel, 211-feeding port, 212-discharging port, 213-first card slot, 214-second card slot, 22-mixing auger, 221-strip slot, 222-transmission rod, 223-transmission blade, 224-first clamping ring, 23-fixing rod, 231-second clamping ring, 24-stirring rod, 25-tooth groove, 26-fixed platform, 3 -forming mold, 31-feeding pipe, 4-driving assembly, 41-driving gear, 42-driving motor, 43-fixing block, 44-connecting rod, 45-first auxiliary gear, 46-second auxiliary gear, 461-step surface, 47-support leg, 48-telescopic rod, 49-spring, 5-fixing plate, 51-threaded rod, 52-threaded connecting block, 53-limiting plate, 54-limiting rod, 55-groove, 56-limiting slot. DETAILED DESCRIPTION

[0042] Example 1

[0043] like Figure 1 As shown, a wear-resistant repair material feeding device for a CFB circulating fluidized bed includes a crushing barrel 1, a stirring and kneading assembly 2 connected to the crushing barrel 1 via a detachable feeding pipe 11, and a forming mold 3 connected to the stirring and kneading assembly 2 via a detachable discharge pipe 31. A feed port 211 is provided on the inner and outer walls of one mixing barrel 21, and a discharge port 212 is provided on the inner and outer walls of the other mixing barrel 21. The feed port 211 is detachably connected to the feeding pipe 11, and the discharge port 212 is detachably connected to the discharge pipe 31.

[0044] like Figures 2 to 5 As shown, the stirring and kneading component 2 includes two symmetrically arranged kneading barrels 21, two kneading augers 22 are symmetrically arranged between the two kneading barrels 21, a fixed rod 23 is provided in the middle of the two kneading barrels 21, and the fixed rod 23 is rotatably connected to the two kneading barrels 21. Six stirring rods 24 are evenly spaced around the outer wall of the fixed rod 23 corresponding to the internal positions of the two kneading barrels 21. A driving component 4 for driving the two kneading barrels 21 to rotate synchronously is provided on one side of the stirring and kneading component 2. A circle of tooth grooves 25 are provided on the outer walls of the opposite sides of the two kneading barrels 21. The tooth grooves 25 are respectively meshed and connected with two driving gears 41 provided in the driving component 4. The kneading barrel 21 corresponding to the rear side of the tooth grooves 25 is hemispherical.

[0045] like Figure 2 、 6As shown, a driving motor 42 is provided at the outer center of one of the driving gears 41, a fixing block 43 is provided at the outer center of the other driving gear 41, and a connecting rod 44 is fixed at the center of the two driving gears 41. One end of the connecting rod 44 is connected to the output end of the driving motor 42, and the other end of the connecting rod 44 is rotatably connected to the fixing block 43. A first auxiliary gear 45 and a second auxiliary gear 46 for controlling the rotation of the two mixing augers 22 are symmetrically provided on both sides of the middle of the connecting rod 44. The first auxiliary gear 45 and the second auxiliary gear 46 are respectively connected to the two mixing augers 22. The strip grooves 221 provided on the outer wall of each mixing auger 22 are periodically meshed and connected, and the mixing auger 22 is rotatably connected to the inner and outer walls of the two mixing barrels 21, so that the mixing auger 22 rotates synchronously with the mixing barrel 21 and completes periodic rotation by periodically meshing with the first auxiliary gear 45 or the second auxiliary gear 46. A fixing platform 26 is provided at each end of the fixing rod 23, and the drive motor 42 and the fixing block 43 are symmetrically arranged. Support legs 47 are provided at the bottom of the drive motor 42 and the fixing block 43. The drive motor 42 is a commercially available motor.

[0046] like Figure 3 、 6 As shown in , 7, the first auxiliary gear 45 and the second auxiliary gear 46 are movably connected by a telescopic rod 48 and a spring 49. The telescopic rod 48 and the spring 49 are symmetrically arranged about the connecting rod 44. The first auxiliary gear 45 is fixed to the connecting rod 44, and the second auxiliary gear 46 is slidingly arranged with the connecting rod 44. A step surface 461 is provided on the inner edge of the second auxiliary gear 46. A fixing plate 5 is provided on the top of the fixing block 43 and the driving motor 42. A threaded rod 51 is provided between the two fixing plates 5. A threaded connecting block 52 is provided on the middle threaded connecting sleeve of the threaded rod 51. A limiting plate 53 is provided on the external rotating connecting sleeve of the threaded connecting block 52. The limiting plate 53 is aligned with the step surface 461 for limiting the second auxiliary gear 46. A limiting rod 54 is provided on the top of the two fixing plates 5. The limiting rod 54 is slidably connected to the groove 55 provided at the top center of the limiting plate 53, and the limiting plate 53 is rotatably connected to the limiting groove 56 provided on the outer wall of the threaded connecting block 52.

[0047] like Figure 4 As shown, a conveying rod 222 is provided in the middle part of the mixing auger 22, and a spiral conveying blade 223 is provided on the conveying rod 222. Each conveying blade 223 is fixedly connected to the inner wall of the mixing auger 22. A first clamping ring 224 is provided at both ends of the mixing auger 22. The first clamping ring 224 is rotatably connected to the first clamping groove 213 provided on the inner outer wall of the mixing barrel 21. A second clamping ring 231 is provided on the outer wall of the fixed rod 23 corresponding to the outer inner wall of the mixing barrel 21. The second clamping ring 231 is rotatably connected to the second clamping groove 214 provided on the outer inner wall of the mixing barrel 21.

[0048] Example 2

[0049] This embodiment differs from embodiment 1 in that:

[0050] The number of stirring rods 24 is five.

[0051] Example 3

[0052] This embodiment differs from embodiment 1 in that:

[0053] The number of stirring rods 24 is nine.

[0054] Example 4

[0055] This embodiment is a method for feeding wear-resistant repair material for a CFB circulating fluidized bed according to the feeding device in Example 1, comprising the following steps:

[0056] S1. Crushing: Aggregates and admixtures are placed in a crushing barrel 1 for crushing, and then the crushed aggregates and admixtures are fed into a mixing barrel 21 of a stirring and mixing assembly 2 through a feeding pipe 11;

[0057] S2. Primary stirring and mixing: A phosphoric acid solution having a mass concentration of 50% is added to the mixing barrel 21. The drive motor 42 is turned on to drive the connecting rod 44 and the two driving gears 41 to rotate, thereby driving the two mixing barrels 21 to rotate under the meshing action of the driving gears 41 and the tooth grooves 25. During the rotation of the mixing barrels 21, the fixed rod 23 and the stirring rod 24 are always kept fixed, so that the stirring rod 24 completes the stirring and mixing of the aggregate and the admixture to obtain a primary mixed material. The primary mixed material is allowed to stand in the mixing barrel 21 for 20 hours.

[0058] S3, secondary stirring and mixing: continue to add phosphoric acid solution and coagulant into the mixing barrel 21, the coagulant is alumina cement, turn on the drive motor 42 to drive the connecting rod 44 and the two drive gears 41 as well as the first auxiliary gear 45 and the second auxiliary gear 46 to rotate synchronously, and whenever the two mixing augers 22 rotate to the position of the first auxiliary gear 45 or the second auxiliary gear 46, the mixing augers 22 are periodically meshed with the first auxiliary gear 45 or the second auxiliary gear 46 to complete periodic rotation. The stirring and mixing time is 1 to 2 hours to obtain a secondary mixed material;

[0059] The weight ratio of the aggregate, the admixture, the phosphoric acid solution added during the first mixing and kneading, the phosphoric acid solution added during the second mixing and kneading, and the coagulant is 65:35:4:8:2. The rotation speed of the mixing barrel 21 is 60 rpm. Whenever the mixing auger 22 is engaged with the first auxiliary gear 45 or the second auxiliary gear 46, the rotation angle of the mixing auger 22 is 160°.

[0060] S4, molding: The secondary mixed material is introduced into the molding die 3 through the feeding pipe 31, and after vibration molding, the mold is demolded and dried to obtain the wear-resistant repair material for the circulating fluidized bed, and the wear-resistant repair material for the circulating fluidized bed is sent into the circulating fluidized bed for repairing the designated position.

[0061] Example 4

[0062] This embodiment differs from embodiment 3 in that:

[0063] S2. Primary stirring and mixing: add phosphoric acid solution with a mass concentration of 45% into the mixing barrel 21, turn on the drive motor 42 to drive the connecting rod 44 and the two driving gears 41 to rotate, thereby driving the two mixing barrels 21 to rotate under the meshing action of the driving gear 41 and the tooth groove 25. During the rotation of the mixing barrels 21, the fixed rod 23 and the stirring rod 24 are always kept fixed, so that the stirring rod 24 completes the stirring and mixing of the aggregate and the admixture to obtain a primary mixed material, and the primary mixed material is allowed to stand in the mixing barrel 21 for 16 hours.

[0064] Example 5

[0065] This embodiment differs from embodiment 3 in that:

[0066] S2. Primary stirring and mixing: add phosphoric acid solution with a mass concentration of 55% into the mixing barrel 21, turn on the drive motor 42 to drive the connecting rod 44 and the two driving gears 41 to rotate, thereby driving the two mixing barrels 21 to rotate under the meshing action of the driving gear 41 and the tooth groove 25. During the rotation of the mixing barrel 21, the fixed rod 23 and the stirring rod 24 are always kept fixed, so that the stirring rod 24 completes the stirring and mixing of the aggregate and the admixture to obtain a primary mixed material, and the primary mixed material is allowed to stand in the mixing barrel 21 for 24 hours.

[0067] Example 6

[0068] This embodiment differs from embodiment 3 in that:

[0069] The weight ratio of aggregate, admixture, phosphoric acid solution added during the first mixing and kneading, phosphoric acid solution added during the second mixing and kneading, and coagulant is 60:30:3:7:1. The rotation speed of the mixing barrel 21 is 40 rpm. Whenever the mixing auger 22 engages with the first auxiliary gear 45 or the second auxiliary gear 46, the rotation angle of the mixing auger 22 is 120°.

[0070] Example 7

[0071] This embodiment differs from embodiment 3 in that:

[0072] The weight ratio of aggregate, admixture, phosphoric acid solution added during the first mixing and kneading, phosphoric acid solution added during the second mixing and kneading, and coagulant is 70:40:5:10:3. The rotation speed of the mixing barrel 21 is 80 rpm. Whenever the mixing auger 22 engages with the first auxiliary gear 45 or the second auxiliary gear 46, the rotation angle of the mixing auger 22 is 180°.

[0073] Example 8

[0074] This embodiment differs from embodiment 3 in that:

[0075] The aggregate is brown corundum powder, and the admixtures are 2 parts of aluminum dihydrogen phosphate binder, 1 part of explosion-proof fiber, 1 part of ceramic fiber, 0.5 parts of dispersant, 3 parts of zirconium dioxide powder, 3 parts of yttrium oxide powder, and 1 part of titanium diboride powder.

[0076] Working principle:

[0077] The working principle of the wear-resistant repair material feeding device for a CFB circulating fluidized bed of the present invention is briefly described below in conjunction with the method of the present invention.

[0078] When in use, first install the feed pipe 11, add the aggregate, admixture, and phosphoric acid solution through the feed port 211, then remove the feed pipe 11, and seal the feed port 211, and then stir and mix according to the method in step S2. At this time, the state of the stirring and mixing component 2 is as follows: Figure 6 As shown, the second auxiliary gear 46 and the strip groove 221 of the mixing auger 22 are not on the same horizontal plane. During the rotation of the mixing barrel 21, only one strip groove 221 of the mixing auger 22 is alternately engaged with the first auxiliary gear 45 to complete the periodic rotation, thereby gradually conveying the material inside the mixing barrel 21 corresponding to the feed port 221 to the other mixing barrel 21, and continuing to be mixed in the other mixing barrel 21.

[0079] When step S3 is required, the threaded connecting block 52 is rotated by a specific tool to rotate along the threaded rod 51, and at the same time, the limiting plate 53 is driven to move toward the first auxiliary gear 45, thereby causing the second auxiliary gear 46 to also move toward the first auxiliary gear 45 until the second auxiliary gear 46 is aligned with the strip groove 221 of the other mixing auger 22. Figure 3As shown, at this time, during the rotation of the mixing barrel 21, the strip grooves 221 of the two mixing augers 22 are alternately meshed with the two auxiliary gears, so that the two mixing augers 22 achieve synchronous periodic rotation. Taking the parameters in Example 7 as an example, whenever the mixing augers 22 rotate to the auxiliary gear position, they rotate 180° under the meshing action of the auxiliary gear and the strip groove 221, and then separate, and the mixing augers 22 stop rotating. Under the premise that the two mixing augers 22 rotate at the same angle, the materials transported by the internal rotating blades 223 are also the same, thereby achieving mutual transportation of the materials inside the two mixing barrels 21, thereby improving the mixing effect;

[0080] Before proceeding to step S4, the position of the threaded connection block 52 must first be reset to Figure 6 In the state shown in , all the materials can be transported to the mixing barrel 21 on the side where the discharge port 212 is located, and then the discharge port 212 of the mixing barrel 21 is moved to the bottom by the driving motor 42, and the rotation is stopped. The discharge port 212 is opened and the discharge pipe 31 is installed to complete the material discharge.

Claims

1. A wear-resistant repair material feeding device for a CFB circulating fluidized bed, characterized in that: It comprises a crushing barrel (1), a stirring and kneading assembly (2) connected to the crushing barrel (1) via a detachable feeding pipe (11), and a forming die (3) connected to the stirring and kneading assembly (2) via a detachable feeding pipe (31); The stirring and kneading assembly (2) comprises two symmetrically arranged kneading barrels (21), two kneading screws (22) are symmetrically arranged between the two kneading barrels (21), a fixed rod (23) is provided in the middle of the two kneading barrels (21) and passes through the inside thereof, the fixed rod (23) is rotatably connected to the two kneading barrels (21), a plurality of stirring rods (24) are equidistantly arranged around the outer wall of the fixed rod (23) at positions corresponding to the inside of the two kneading barrels (21), a driving assembly (4) for driving the two kneading barrels (21) to rotate synchronously is provided on one side of the stirring and kneading assembly (2), a circle of tooth grooves (25) are provided on the outer walls of the two kneading barrels (21) on the opposite side, and the tooth grooves (25) are respectively meshed and connected with two driving gears (41) provided in the driving assembly (4); A feed port (211) is provided on the inner outer wall of one of the mixing barrels (21), and a discharge port (212) is provided on the inner outer wall of the other mixing barrel (21), wherein the feed port (211) is detachably connected to the feeding pipe (11), and the discharge port (212) is detachably connected to the discharge pipe (31); A driving motor (42) is provided at the center of the outer side of one of the driving gears (41), a fixed block (43) is provided at the center of the outer side of the other driving gear (41), and a connecting rod (44) is fixed at the center of the two driving gears (41), one end of the connecting rod (44) is connected to the output end of the driving motor (42), and the other end of the connecting rod (44) is rotatably connected to the fixed block (43), and first auxiliary screws for controlling the rotation of the two mixing screws (22) are symmetrically provided on both sides of the middle of the connecting rod (44). An auxiliary gear (45) and a second auxiliary gear (46), wherein the first auxiliary gear (45) and the second auxiliary gear (46) are periodically meshed and connected with the strip grooves (221) provided on the outer walls of the two mixing screws (22), respectively, and the mixing screw (22) and the inner and outer walls of the two mixing barrels (21) are both rotatably engaged, so that the mixing screw (22) and the mixing barrel (21) rotate synchronously and simultaneously complete periodic self-rotation through periodic meshing connection with the first auxiliary gear (45) or the second auxiliary gear (46).

2. A wear-resistant repair material feeding device for a CFB circulating fluidized bed according to claim 1, characterized in that: A fixing platform (26) is provided at each end of the fixing rod (23), the driving motor (42) and the fixing block (43) are symmetrically arranged, and supporting legs (47) are provided at the bottom of the driving motor (42) and the fixing block (43).

3. The wear-resistant repair material feeding device for a CFB circulating fluidized bed according to claim 1, characterized in that: The number of the stirring rods (24) is 5 to 9, and the mixing barrel (21) corresponding to the rear side of the tooth groove (25) is hemispherical.

4. The wear-resistant repair material feeding device for a CFB circulating fluidized bed according to claim 1, characterized in that: The first auxiliary gear (45) and the second auxiliary gear (46) are movably connected via a telescopic rod (48) and a spring (49). The telescopic rod (48) and the spring (49) are symmetrically arranged with respect to the connecting rod (44). The first auxiliary gear (45) and the connecting rod (44) are fixedly arranged. The second auxiliary gear (46) and the connecting rod (44) are slidably arranged. The inner edge of the second auxiliary gear (46) is provided with a step surface (461). A fixing plate (5) is provided on the top of each of the fixing block (43) and the driving motor (42). A threaded rod (51) is provided between the two fixed plates (5), a threaded connection sleeve in the middle of the threaded rod (51) is provided with a threaded connection block (52), an external rotation connection sleeve of the threaded connection block (52) is provided with a limit plate (53), the limit plate (53) is aligned with the step surface (461) and is used to limit the second auxiliary gear (46), a limit rod (54) is provided on the top of the two fixed plates (5), and the limit rod (54) is slidably connected to a groove (55) provided at the center of the top of the limit plate (53).

5. A wear-resistant repair material feeding device for a CFB circulating fluidized bed according to claim 4, characterized in that: The limiting plate (53) is rotatably connected to a limiting groove (56) provided on the outer wall of the threaded connection block (52).

6. The wear-resistant repair material feeding device for a CFB circulating fluidized bed according to claim 1, characterized in that: A conveying rod (222) is provided in the middle of the mixing auger (22), and a spiral conveying blade (223) is provided on the conveying rod (222). Each conveying blade (223) is fixedly connected to the inner wall of the mixing auger (22). A first clamping ring (224) is provided at both ends of the mixing auger (22). The first clamping ring (224) is rotatably connected to a first clamping groove (213) provided on the inner outer wall of the mixing barrel (21). A second clamping ring (231) is provided on the outer wall of the fixed rod (23) corresponding to the outer inner wall of the mixing barrel (21). The second clamping ring (231) is rotatably connected to a second clamping groove (214) provided on the outer inner wall of the mixing barrel (21).

7. A method for feeding wear-resistant repair material for a CFB circulating fluidized bed using the feeding device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Crushing: Aggregates and admixtures are placed in a crushing barrel (1) for crushing, and then the crushed aggregates and admixtures are fed into a mixing barrel (21) of a stirring and mixing assembly (2) through a feeding pipe (11); S2, primary stirring and mixing: adding phosphoric acid solution into the mixing barrel (21), turning on the driving motor (42) to drive the connecting rod (44) and the two driving gears (41) to rotate, thereby driving the two mixing barrels (21) to rotate under the meshing action of the driving gear (41) and the tooth groove (25), and the fixed rod (23) and the stirring rod (24) are always kept fixed during the rotation of the mixing barrel (21), so that the stirring rod (24) completes the stirring and mixing of the aggregate and the admixture to obtain a primary mixed material, and the primary mixed material is left to stand in the mixing barrel (21) for 16 to 24 hours; S3, secondary stirring and mixing: continue to add phosphoric acid solution and coagulant into the mixing barrel (21), turn on the drive motor (42) to drive the connecting rod (44) and the two drive gears (41) as well as the first auxiliary gear (45) and the second auxiliary gear (46) to rotate synchronously, and whenever the two mixing screws (22) rotate to the position of the first auxiliary gear (45) or the second auxiliary gear (46), the mixing screw (22) is periodically engaged with the first auxiliary gear (45) or the second auxiliary gear (46) to complete periodic self-rotation, and the stirring and mixing time is 1 to 2 hours to obtain a secondary mixed material; S4, molding: The secondary mixed material is introduced into the molding die (3) through the feeding pipe (31), and after vibration molding, the material is demoulded and dried to obtain the wear-resistant repair material for the circulating fluidized bed, and the wear-resistant repair material for the circulating fluidized bed is sent into the circulating fluidized bed for repairing the designated position.

8. The method for feeding wear-resistant repairing material according to claim 7, characterized in that: The mass concentration of the phosphoric acid solution is 45-55%, the coagulant is alumina cement, and the weight ratio of the aggregate, the admixture, the phosphoric acid solution added during the first stirring and mixing, the phosphoric acid solution added during the second stirring and mixing, and the coagulant is 60-70:30-40:3-5:7-10:1-3. In steps S2 and S3, the rotation speed of the mixing barrel (21) is 40-80 rpm, and the rotation angle of the mixing auger (22) is 120°-180° whenever the mixing auger (22) is engaged with the first auxiliary gear (45) or the second auxiliary gear (46).

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