A water-coal slurry feeding device for a multi-pass circulating fluidized bed boiler

Abstract

The present invention discloses a water-coal slurry feeding device for a multi-pass circulating fluidized bed boiler, which relates to the technical field of boilers, including a shotcrete box and a slurry supply pipe. A discharge plate is arranged on the right side of the slurry supply pipe, a movable frame is arranged on the right side of the discharge plate, a spray hole is opened at the right end of the shotcrete box, and an adjustment component is arranged in the spray hole. The water-coal slurry feeding device for a multi-pass circulating fluidized bed boiler, through the powerful thrust generated by the rotation of the hydraulic blades, not only improves the output power of the spray hole, but also enables the sprayed water-coal slurry to obtain a greater driving force, thereby significantly improving the work efficiency; through the movement of the third gear rod, the precise control of the control rod and the adjustment plate, the operator can flexibly adjust the injection speed of the water-coal slurry according to actual needs, and realizes the precise control of the injection process; the knocking action of the knocking rod can effectively prevent the water-coal slurry particles from blocking the pipeline during the transportation process, thereby improving the stability and reliability of the entire system.

Description

Technical Field

[0001] The invention relates to the technical field of boilers, in particular to a water-coal slurry feeding device for a multi-pass circulating fluidized bed boiler. Background Art

[0002] With the increasingly stringent environmental protection requirements and the continuous improvement of energy utilization efficiency, multi-pass circulating fluidized bed boilers, as a high-efficiency, low-pollution combustion equipment, have been widely used in industrial production. Its core advantage is that it can achieve efficient combustion of solid fuels and achieve efficient heat recovery and utilization through circulating fluidization technology. However, for water-coal slurry, a new type of clean coal-based fuel, the traditional feeding device has the following significant defects when applied to multi-pass circulating fluidized bed boilers:

[0003] Insufficient precise control: Traditional water-coal slurry feeding devices usually rely on mechanical transmission and simple control systems, which cannot achieve precise control of the water-coal slurry injection speed and injection amount, which leads to unstable supply of water-coal slurry during combustion, affecting the combustion efficiency and environmental performance of the boiler;

[0004] Poor adjustment flexibility: Existing feeding devices often lack a flexible adjustment mechanism and cannot adjust the injection speed and injection amount of water-coal slurry in real time according to the actual working conditions and needs of the boiler, which limits the adaptability of the boiler to different fuels and operating conditions;

[0005] Easy to block problem: Due to the viscosity and fluidity of water-coal slurry, it is easy to form blockage in the pipeline during transportation. The traditional feeding device lacks effective anti-blocking measures. Once blocked, it not only affects the continuity of feeding, but may also cause boiler shutdown and affect production efficiency. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a water-coal slurry feeding device for a multi-pass circulating fluidized bed boiler, which solves the technical problems mentioned in the background technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A water-coal slurry feeding device for a multi-pass circulating fluidized bed boiler, comprising a shotcrete box, a slurry supply pipe located inside the shotcrete box, a discharge plate is arranged on the right side of the slurry supply pipe, a movable frame is arranged on the right side of the discharge plate, a spray hole is opened at the right end of the shotcrete box, and an adjustment component is arranged in the spray hole;

[0008] The adjusting component includes a fixed disk fixed inside the spray hole, a gear ring is rotatably connected inside the fixed disk, four groups of first gears are meshedly connected to the inner side of the gear ring, the inner end of the first gear is meshedly connected to the first gear rod, the other end of the first gear rod is fixedly connected to an adjusting plate slidably mounted on the inner wall of the fixed disk, and the four groups of adjusting plates are staggered, and the inner ends form adjusting grooves, a through groove is opened on the surface of the fixed disk, and the position of the groove corresponds to the position of the adjusting groove, an arc groove is opened on the side of the fixed disk close to the movable frame, and a control rod is slidably connected in the arc groove, one end of the control rod is fixedly connected to the gear ring, and the other end is movably connected to the movable frame through a transmission member.

[0009] As a further preferred embodiment of the present technical solution, the control component includes a second gear rotatably mounted inside the spray box, the upper and lower ends of the second gear are respectively meshed with a second gear rod and a third gear rod, and the second gear rod and the third gear rod are both slidably mounted on the spray box in cooperation with a fifth damping spring, a rectangular frame is fixedly connected to the top of the second gear rod, and the end of the control rod is located in the rectangular frame, one end of the third gear rod is fixedly connected to the second connecting rod, and the other end of the second connecting rod is fixedly connected to a positioning block, and the position of the positioning block corresponds to the position of the movable frame.

[0010] As a further preferred embodiment of the present technical solution, a baffle is slidably connected to the outer wall of the slurry supply pipe, and the baffle is slidably installed on the inner end of the spray box, a first connecting rod is fixedly connected between the baffle and the discharge plate, the first connecting rod is slidably installed on the spray box, and a first damping spring is sleeved on the outer wall of the first connecting rod.

[0011] As a further preferred embodiment of the present technical solution, a slurry discharge hole is provided on the surface of the discharge plate, the specifications of the slurry discharge hole are matched with the specifications of the conveying pipe, a trapezoidal block is fixedly connected to the side of the discharge plate close to the movable frame, and an inclined groove which is matched with the trapezoidal block is provided on the surface of the movable frame.

[0012] As a further preferred embodiment of the present technical solution, the outer end of the movable frame is slidably connected to the inner wall of the spray box through a slider, a fourth damping spring is fixedly connected to the inner wall of the spray box, a stopper is fixedly connected to the other end of the fourth damping spring, and the stopper is slidably mounted on the spray box.

[0013] As a further preferred embodiment of the present technical solution, a delivery pipe corresponding to the spray hole is arranged on the movable frame, a shaft sleeve is rotatably arranged on the delivery pipe, the inner and outer walls of the shaft sleeve are respectively provided with hydraulic blades and pneumatic blades, a motor for driving the shaft sleeve to rotate is arranged on the movable frame, a scraper is fixedly connected to the inner wall of the shaft sleeve, and the scraper slides in contact with the inner wall of the delivery pipe.

[0014] As a further preferred embodiment of the present technical solution, a cross bar is fixedly connected to the outer wall of the sleeve, a knocking rod is rotatably connected to the outer wall of the cross bar, a top plate is fixedly connected to the top of the cross bar, a second damping spring is fixedly connected to the bottom end of the top plate, the other end of the second damping spring is fixedly connected to the knocking rod, and a plurality of lifting blocks are fixedly connected to the outer wall of the conveying pipe, the positions of the lifting blocks correspond to the positions of the knocking rod, and the plurality of lifting blocks are arranged in a circular array.

[0015] As a further optimization of the present technical solution, a conical cylinder is laterally slidably connected to the outer wall of the conveying pipe, a third damping spring is arranged on the side of the conical cylinder away from the pneumatic blades, the opening direction of the conical cylinder corresponds to the position of the pneumatic blades, a push plate is fixedly connected to the bottom end of the outer wall of the conical cylinder, and a step is arranged on one side of the push plate.

[0016] Compared with the prior art, it has the following beneficial effects:

[0017] Through the linkage mechanism among the baffle, discharge plate, trapezoidal block and mobile frame, as well as the relative position adjustment among the conveying pipe, discharge hole and spray hole, it is ensured that the material can accurately enter the conveying pipe from the discharge hole and be sprayed out through the spray hole, thereby improving the accuracy and efficiency of the work.

[0018] Through the cooperation of the moving frame, the positioning block and the second connecting rod, and the meshing of the third gear rod with the second gear, the system can accurately control the movement of the third gear rod, and then accurately control the position of the rectangular frame and the control rod, thereby ensuring the accuracy and stability of the entire transmission system; through the rotation of the control rod and the gear ring, and the movement of the first gear rod and the adjustment plate, the system can accurately adjust the size of the adjustment groove, thereby flexibly controlling the injection speed of the water-coal slurry to meet different work requirements.

[0019] The powerful thrust generated by the rotation of the hydraulic blades not only improves the output power of the spray hole, but also makes the sprayed water-coal slurry obtain greater driving force, thereby significantly improving work efficiency; through the movement of the third gear rod, the precise control of the control rod and the adjustment plate, the operator can flexibly adjust the injection speed of the water-coal slurry according to actual needs, thereby realizing precise control of the injection process; the knocking effect of the knocking rod can effectively prevent the water-coal slurry particles from clogging the pipeline during the transportation process, thereby improving the stability and reliability of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the discharge plate and the movable frame in the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the delivery pipe and the adjustment component in the present invention;

[0023] Figure 4 It is a schematic cross-sectional view of the structure of the delivery pipe in the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the delivery pipe and the shaft sleeve in the present invention;

[0025] Figure 6 for Figure 5 The enlarged view of point A in the middle;

[0026] Figure 7 It is a structural schematic diagram of the regulating component in the present invention;

[0027] Figure 8 It is a schematic diagram of the internal structure of the fixed disk in the present invention;

[0028] Fig. 9 It is a schematic diagram of the structure of the control member and the push plate in the present invention;

[0029] Fig.10 for Fig. 9 Enlarged view of point B in the middle.

[0030] In the figure: 1, spray box; 2, slurry supply pipe; 3, discharge plate; 4, mobile frame; 5, spray hole; 6, adjustment assembly; 21, baffle; 22, first connecting rod; 23, first damping spring; 31, slurry discharge hole; 32, trapezoidal block; 41, conveying pipe; 42, bushing; 43, pneumatic blade; 44, hydraulic blade; 45, scraper; 46, cross bar; 47, knocking rod; 48, top plate; 49, second damping spring; 410, conical cylinder; 411, push plate; 412, ladder; 413, third damping spring ; 414, inclined groove; 415, motor; 416, fourth damping spring; 417, stopper; 418, slider; 419, lifting block; 61, fixed plate; 62, gear ring; 63, first gear; 64, first gear rod; 65, adjustment plate; 66, adjustment groove; 67, slot; 68, arc groove; 69, control rod; 610, second gear; 611, second gear rod; 612, rectangular frame; 613, third gear rod; 614, second connecting rod; 615, positioning block; 616, fifth damping spring. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings of the specification. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] Embodiment 1: Combination Figure 1 - Fig.10As shown, the present invention provides a technical solution: a water-coal slurry feeding device for a multi-pass circulating fluidized bed boiler, comprising a shotcrete box 1, a slurry supply pipe 2 located inside the shotcrete box 1, and a discharge plate 3 on the right side of the slurry supply pipe 2, a movable frame 4 is arranged on the right side of the discharge plate 3, so that the coal slurry in the slurry supply pipe 2 can be evenly and stably discharged into the shotcrete box 1, a spray hole 5 is opened at the right end of the shotcrete box 1, and the spray hole 5 is used to spray the coal slurry into the circulating fluidized bed boiler, and in order to realize the adjustment function of the spray hole 5, an adjustment component 6 is specially arranged in the spray hole 5;

[0033] The adjustment component 6 is mainly composed of a fixed disk 61, a gear ring 62, four groups of first gears 63, a first gear rod 64, an adjustment plate 65, a slot 67, an arc slot 68 and a control rod 69. The fixed disk 61 is fixed inside the spray hole 5, and the gear ring 62 rotates inside the fixed disk 61. The four groups of first gears 63 are arranged in a circular array and meshed with the inner side of the gear ring 62. They can rotate with the rotation of the gear ring 62. The inner end of the first gear 63 is meshed with the first gear rod 64, and the other end of the first gear rod 64 is fixedly connected to the adjustment plate 65. These adjustment plates 65 are slidably mounted on the inner wall of the fixed disk 61, and the four groups of adjustment plates 65 are staggered. The inner ends form an adjustment groove 66. By adjusting the rotation of the gear ring 62, the first gear 63, the first gear rod 64 and the adjustment plate 65 can be driven to be linked, thereby changing the size of the adjustment groove 66 to achieve adjustment of the spray hole 5.

[0034] The surface of the fixing plate 61 is also provided with a through slot 67, the position of the slot 67 corresponds to the position of the adjustment slot 66, and the specification of the slot 67 is larger than that of the adjustment slot 66;

[0035] In order to realize the control of the adjustment component 6, an arc groove 68 is further provided on the side of the fixed plate 61 close to the moving frame 4, and a control rod 69 is slidably connected in the arc groove 68. One end of the control rod 69 is fixedly connected to the ring gear 62, and the other end is movably connected to the moving frame 4 through a transmission member. In this way, when the moving frame 4 moves, the ring gear 62 can be driven to rotate by the control rod 69, thereby realizing the adjustment of the adjustment component 6;

[0036] In addition, in order to achieve precise control of the control rod 69, a control member is also provided. The control member mainly includes a second gear 610 rotatably mounted on the inside of the spray box 1. The upper and lower ends of the second gear 610 are respectively meshed with a second gear rod 611 and a third gear rod 613. The second gear rod 611 and the third gear rod 613 are both slidably mounted on the spray box 1 in cooperation with a fifth damping spring 616, so that they can move smoothly when subjected to force. A rectangular frame 612 is fixedly connected to the top of the second gear rod 611, and the end of the control rod 69 is located in the rectangular frame 612. 12, so that the control rod 69 can drive the movement of the second gear rod 611 when it moves, one end of the third gear rod 613 is fixedly connected to the second connecting rod 614, and the other end of the second connecting rod 614 is fixedly connected to the positioning block 615, and the position of the positioning block 615 corresponds to the position of the moving frame 4. In this way, when the moving frame 4 moves, the second gear rod 611 and the third gear rod 613 can be controlled through the interaction between the positioning block 615 and the third gear rod 613, thereby realizing precise adjustment of the control rod 69 and the adjustment component 6.

[0037] In the embodiment of the present invention, by cleverly cooperating with the moving frame 4, the positioning block 615 and the second connecting rod 614, the third gear rod 613 can be accurately driven to move to one side. During this process, the fifth damping spring 616 is compressed, thereby generating a moderate damping force to ensure the stable movement of the third gear rod 613. As the third gear rod 613 moves, it will mesh with the second gear 610, thereby driving the second gear 610 to start rotating. During the rotation of the second gear 610, through the principle of gear transmission, it will synchronously drive the second gear rod 611 and the rectangular frame 612 to move in the opposite direction of the movement of the third gear rod 613. This coordinated action ensures the stability and accuracy of the entire transmission system. As the rectangular frame 612 moves, it will drive the control rod 69 to move in the arc groove 68. The movement of the control rod 69 further drives the gear ring 62 to rotate. The fixed disk 61 rotates inside. As the core component of the entire transmission system, the fixed disk 61 will drive the four groups of first gears 63 to rotate synchronously during the rotation process. Since the ring gear 62 and the first gear rod 64 are in a meshing relationship, the rotation of the ring gear 62 will drive the first gear rod 64 to move to one side, and the movement of the first gear rod 64 will further drive the four groups of adjustment plates 65 to move synchronously. The function of these four groups of adjustment plates 65 is to control the size of the adjustment groove 66. By accurately controlling the moving distance of the adjustment plate 65, we can achieve precise adjustment of the size of the adjustment groove 66. When it is necessary to speed up the injection speed of the water-coal slurry, we can achieve it by increasing the size of the adjustment groove 66; conversely, when it is necessary to slow down the injection speed of the water-coal slurry, we can achieve it by reducing the size of the adjustment groove 66. This flexible adjustment method enables the entire system to be accurately controlled according to different work requirements.

[0038] Embodiment 2: Combination Figure 1, Figure 2 As shown, on the basis of the first embodiment, the slurry supply pipe 2 is an important part of the entire spraying system, and its outer wall is cleverly designed with a baffle 21, so that the baffle 21 can slide smoothly along the outer wall of the slurry supply pipe 2. This design not only ensures the smooth progress of the slurry supply process, but also provides great convenience for subsequent adjustment and control. The baffle 21 can not only slide on the slurry supply pipe 2, but also is cleverly installed on the inner side end of the spraying box 1. This installation method not only ensures the stability of the baffle 21, but also enables it to play the greatest role in the spraying process. The outer end of the slurry supply pipe 2 is connected to the granulation air inlet for providing granulation air. Wind, and the slurry supply pipe 2 is connected to the water-coal slurry inlet. After the granulated wind pushes the baffle 21 to the side of the spray hole 5, when the water-coal slurry enters the conveying pipe 41 and the spray hole 5 through the slurry supply pipe 2, under the action of the granulated wind, the water-coal slurry is dispersed into drop-shaped particles at the outlet and is sent into the furnace through the outlet. The surface of the baffle 21 is also provided with a through hole for the granulated wind to act on the water-coal slurry. In order to further strengthen the connection between the baffle 21 and the discharge plate 3, the two are fixedly connected by a first connecting rod 22. At the same time, the first connecting rod 22 is also slidably installed on the spray box 1. Such a design enables it to move freely without affecting the operation of other components.

[0039] In addition, in order to further improve the stability and reliability of the entire system, a first damping spring 23 is sleeved on the outer wall of the first connecting rod 22. The presence of the first damping spring 23 can effectively reduce the energy generated by vibration or impact, thereby protecting the entire system from damage;

[0040] The surface of the discharge plate 3 is provided with a slurry discharge hole 31, and the specification of the slurry discharge hole 31 is adapted to the specification of the conveying pipe 41, which ensures that the slurry can smoothly pass through the slurry discharge hole 31 into the conveying pipe 41 and finally be conveyed to a predetermined position;

[0041] It is worth mentioning that the discharge plate 3 is also fixedly connected with a trapezoidal block 32 on one side close to the mobile frame 4. This design enables a close matching relationship to be formed between the discharge plate 3 and the mobile frame 4, and the surface of the mobile frame 4 is provided with an inclined groove 414 that is mutually compatible with the trapezoidal block 32;

[0042] The movable frame 4 is another important part of the entire shotcrete system. Its outer end is slidably connected to the inner wall of the shotcrete box 1 through a slider 418. This connection mode enables the movable frame 4 to move flexibly inside the shotcrete box 1, thereby realizing precise control of the shotcrete process.

[0043] In order to further improve the stability of the mobile frame 4, a fourth damping spring 416 is fixedly connected to the inner wall of the spray box 1, and the other end of the fourth damping spring 416 is fixedly connected to a stopper 417, so that the stopper 417 can play a buffering and stabilizing role when the mobile frame 4 moves. At the same time, the stopper 417 is also slidably installed on the spray box 1. This design enables it to be freely moved and adjusted without affecting the operation of other components.

[0044] In the embodiment of the present invention, when the work starts, the granulated wind becomes the key factor to push the baffle 21 to move. The force of the wind makes the baffle 21 move toward the side of the spray hole 5. At the same time, the linkage mechanism between the baffle 21 and the first connecting rod 22 plays a role. The movement of the baffle 21 drives the movement of the first connecting rod 22, thereby pushing the discharge plate 3 to move toward the side of the moving frame 4. In this process, the movement of the discharge plate 3 will compress the first damping spring 23, causing the spring to deform and store energy. The role of the first damping spring 23 is far more than that. After the work is completed, when the discharge plate 3 is no longer required to remain in a specific position, the first damping spring 23 will use its stored energy to push the baffle 21 and the discharge plate 3 back to the initial position to achieve reset. This reset mechanism ensures that the device can be restored to its original state after each use, ready for the next work.

[0045] As the discharge plate 3 moves, the trapezoidal block 32 also moves into the inclined groove 414. The matching relationship between the trapezoidal block 32 and the inclined groove 414 enables the trapezoidal block 32 to push the moving frame 4 to move forward and backward. This moving mechanism causes the relative positions of the conveying pipe 41, the slurry discharge hole 31 and the spray hole 5 to change.

[0046] Specifically, when the trapezoidal block 32 moves in the inclined groove 414, it pushes the moving frame 4 to move forward and backward along a certain trajectory. This movement gradually adjusts the positional relationship between the conveying pipe 41 and the slurry discharge hole 31 and the spray hole 5, and finally makes the three of them in the same horizontal position. This positional correspondence is the key to ensure the smooth progress of the work.

[0047] As the discharge plate 3 continues to move to the right, the communication relationship between the two ends of the conveying pipe 41 and the slurry discharge hole 31 and the spray hole 5 is gradually established. This communication setting ensures that the material can smoothly enter the conveying pipe 41 from the slurry discharge hole 31 and finally be sprayed out through the spray hole 5;

[0048] As the discharge plate 3 continues to move, the slider 418 will be driven to push the stopper 417 to move to one side. During this process, the stopper 417 will compress the fourth damping spring 416, causing the spring to deform and store energy. Similar to the first damping spring 23, the fourth damping spring 416 also plays a role in resetting. When the work is completed, the fourth damping spring 416 will use its stored energy to push the stopper 417 back to the initial position, thereby driving the moving frame 4 to reset.

[0049] To sum up, the entire device achieves precise control and adjustment of the positional relationship between the conveying pipe 41, the slurry discharge hole 31 and the spray hole 5 through the elastic force of the first damping spring 23 and the fourth damping spring 416, and the linkage mechanism between the various components. This design not only improves work efficiency, but also ensures work stability and reliability.

[0050] Example 3: Combination Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Fig. 9 As shown, on the basis of the second embodiment, the mobile frame 4 is one of the core structures of the whole device, on which a delivery pipe 41 corresponding to the spray hole 5 is cleverly arranged, on the delivery pipe 41, a shaft sleeve 42 is rotatably arranged, and the inner and outer walls of the shaft sleeve 42 are cleverly arranged with liquid blades 44 and pneumatic blades 43, respectively. The liquid blades 44 are responsible for generating a driving force when the liquid flows, and the pneumatic blades 43 are driven by the motor 415 to rotate the shaft sleeve 42. In order to drive the rotation of the shaft sleeve 42, a motor 415 is specially arranged on the mobile frame 4, which provides a continuous source of power for the rotation of the shaft sleeve 42, and the scraper 45 fixedly connected to the inner wall of the shaft sleeve 42 slides in contact with the inner wall of the delivery pipe 41, effectively preventing the blockage and accumulation of materials;

[0051] The outer wall of the shaft sleeve 42 is also fixedly connected to a cross bar 46, which connects the shaft sleeve 42 and a knocking rod 47. The knocking rod 47 rotatably connected to the outer wall of the cross bar 46 can knock the delivery pipe 41 in certain circumstances to help remove attachments on the inner wall;

[0052] In order to ensure the stability and flexibility of the knocking rod 47, a top plate 48 is fixedly connected to the top of the cross bar 46, and a second damping spring 49 fixed at the bottom of the top plate 48 plays a role of buffering and stabilization, so that the knocking rod 47 can be more stable and powerful when knocking;

[0053] A plurality of lifting blocks 419 are fixedly connected to the outer wall of the delivery pipe 41. The positions of these lifting blocks 419 and the knocking rod 47 correspond to each other, and can provide additional support and stability when the knocking rod 47 knocks. At the same time, the plurality of lifting blocks 419 are arranged in a circular array, making the entire structure more uniform and stable.

[0054] In addition, the outer wall of the delivery pipe 41 is also laterally slidably connected to a conical cylinder 410. The design of the conical cylinder 410 is very clever. The opening direction thereof corresponds to the position of the wind blades 43, so that the wind generated by the wind blades 43 can smoothly enter the conical cylinder 410. The third damping spring 413 arranged on the side of the conical cylinder 410 away from the wind blades 43 plays a role in buffering and regulating the air volume.

[0055] The pushing plate 411 fixed at the bottom end of the outer wall of the conical cylinder 410 can generate a driving force under the action of wind, further enhancing the dynamic performance of the entire device, and the step 412 set on one side of the pushing plate 411 makes the pushing plate 411 more stable and smooth during the pushing process.

[0056] In the embodiments of the present invention, in modern industrial production, how to effectively control the injection speed of water-coal slurry and prevent the blockage of the conveying pipeline has always been a challenge that engineers need to face. This article aims to introduce in detail a synchronous rotation device of pneumatic and hydraulic blades driven by a motor, which can not only improve the injection power of water-coal slurry, but also effectively prevent the blockage of the conveying pipeline;

[0057] First, let's look at the main working principle of the device. After the motor 415 is started, it drives the shaft sleeve 42, the pneumatic blades 43 and the hydraulic blades 44 to realize synchronous rotation on the conveying pipe 41. At this time, the rotation of the hydraulic blades 44 will generate a strong thrust, which pushes the water-coal slurry to flow to the spray hole 5 more quickly. This thrust not only increases the output power of the spray hole 5, but also makes the sprayed water-coal slurry obtain greater driving force, thereby improving the working efficiency.

[0058] During the rotation of the wind blade 43, it generates a thrust for the cone tube 410 to move to one side. This thrust compresses the third damping spring 413, thereby realizing precise control of the cone tube 410. The moving distance of the cone tube 410 is proportional to the thrust generated by the wind blade 43, that is, the greater the thrust, the farther the cone tube 410 moves to one side. This design enables the step 412 to cooperate with the positioning block 615 and the second connecting rod 614 to drive the third gear rod 613 to move precisely.

[0059] The moving distance of the third gear rod 613 further affects the moving distance of the control rod 69, thereby realizing precise control of the four groups of adjustment plates 65. When the adjustment plates 65 move away from each other, the adjustment slot 66 becomes larger, thereby accelerating the injection speed of the water-coal slurry. Conversely, when the adjustment plates 65 move closer to each other, the adjustment slot 66 becomes smaller, thereby slowing down the injection speed of the water-coal slurry. This design enables the operator to flexibly adjust the injection speed of the water-coal slurry according to actual needs.

[0060] In addition, when the shaft sleeve 42 rotates, it can also drive the cross bar 46 and the knocking rod 47 to realize synchronous rotation. When the end of the knocking rod 47 contacts the surface of the lifting block 419 during the rotation process, due to the blocking effect of the lifting block 419, the knocking rod 47 will rotate outward and compress the second damping spring 49. When the knocking rod 47 slides over the lifting block 419, the elastic force of the second damping spring 49 will push the knocking rod 47 to rotate to the side of the conveying pipe 41, thereby knocking the conveying pipe 41. This knocking effect can effectively prevent the water-coal slurry particles from blocking the pipeline during the conveying process, thereby improving the stability and reliability of the entire system.

[0061] The motor 415 can be used to accurately adjust the rotation speed of the pneumatic blades 43 and the hydraulic blades 44. When the injection speed of the water-coal slurry needs to be accelerated, the speed of the motor can be increased; conversely, when the injection speed needs to be slowed down, the speed of the motor can be reduced. This intelligent control method enables the device to adapt to different working environments and process requirements, thereby improving work efficiency and product quality.

[0062] Working principle of water-coal slurry feeding device for multi-pass circulating fluidized bed boiler:

[0063] Step 1: The water-coal slurry is transported to one side of the discharge plate 3 through the slurry supply pipe 2, and the wind is used to push the baffle plate 21 to move to the side of the spray hole 5. The baffle plate 21 cooperates with the first connecting rod 22 to push the discharge plate 3 to move to the side of the movable frame 4, so that the trapezoidal block 32 moves into the inclined groove 414, so that the trapezoidal block 32 cooperates with the inclined groove 414 to push the movable frame 4 to move forward and backward, thereby driving the positions of the conveying pipe 41 and the slurry discharge hole 31 and the spray hole 5 to correspond to each other, so that the conveying pipe 41, the slurry discharge hole 31 and the spray hole 5 are in the same horizontal position, and as the discharge plate 3 continues to move to the right, the two ends of the conveying pipe 41 are connected with the slurry discharge hole 31 and the spray hole 5, and in the process of continuing to move, it can drive the slider 418 to push the block 417 to move to one side;

[0064] Step 2: Turn on the motor 415 to drive the sleeve 42, the pneumatic blades 43, and the hydraulic blades 44 on the conveying pipe 41 to rotate synchronously. At this time, the rotation of the hydraulic blades 44 will form a thrust, so that the water-coal slurry is input into the spray hole 5 more quickly, thereby increasing the output power of the spray hole 5, so that the sprayed water-coal slurry obtains a greater driving force. At the same time, when the pneumatic blades 43 rotate, they generate a thrust to move the conical cylinder 410 to one side and compress the third damping spring 413, that is, The greater the thrust generated on the conical cylinder 410, the farther the conical cylinder 410 moves to one side, that is, the farther the step 412 moves, the farther the step 412 cooperates with the positioning block 615 and the second connecting rod 614 to drive the third gear rod 613 to move, thereby cooperating with the second gear 610, the second gear rod 611, and the rectangular frame 612 to drive the control rod 69 to move farther, thereby controlling the four groups of adjustment plates 65 to move away from each other, and the adjustment slot 66 becomes larger;

[0065] Step 3: The conical cylinder 410 pushes the push plate 411 to move to one side. Since the push plate 411 is provided with a step 412, the push plate 411 cooperates with the step 412, the positioning block 615, and the second connecting rod 614 to push the third gear rod 613 to move to one side, so that the third gear rod 613 drives the second gear 610 to rotate. During the rotation process, the second gear 610 drives the second gear rod 611 and the rectangular frame 612 to move in the opposite direction of the third gear rod 613, so that the rectangular frame 612 drives The movable control rod 69 moves in the arc groove 68, and the control rod 69 drives the gear ring 62 to rotate in the fixed plate 61. During the rotation of the fixed plate 61, the four sets of first gears 63 are driven to rotate synchronously, and the gear ring 62 drives the meshing first gear rod 64 to move to one side, thereby driving the four sets of adjustment plates 65 to move synchronously, and then the four sets of adjustment plates 65 are used to control the size of the adjustment groove 66, that is, to control the adjustment groove 66 to increase, thereby accelerating the injection speed of the water-coal slurry, and to control the adjustment groove 66 to decrease, thereby slowing down the injection speed of the water-coal slurry.

[0066] Step 4: When the shaft sleeve 42 rotates, it can drive the cross bar 46 and the knocking rod 47 to rotate synchronously. When the knocking rod 47 rotates, when the end of the knocking rod 47 slides toward the surface of the lifting block 419, the knocking rod 47 rotates outward under the action of the lifting block 419 and compresses the second damping spring 49. When the knocking rod 47 slides over the lifting block 419, the knocking rod 47 is pushed to rotate toward the side of the conveying pipe 41 under the elastic force of the second damping spring 49, so that the knocking rod 47 knocks the conveying pipe 41, thereby preventing the conveying pipe 41 from being blocked by the water-coal slurry particles.

[0067] Step 5: The water-coal slurry is transformed into fine water-coal slurry droplets through the conveying pipe 41, the regulating assembly 6 and the nozzle 5, and evenly sprinkled from the top of the furnace and put into the lower part of the combustion chamber of the main combustion chamber. The water-coal slurry droplets are dried and pyrolyzed during the falling process, and fall into the hot bed material composed of quartz sand and limestone, the temperature of which is about 850-950°C. The water-coal slurry is heated by the hot fluidized bed material to quickly precipitate the remaining water, volatilize and analyze, ignite and burn, and the coke is burned, and particles are formed in the fluidized state. The granular water-coal slurry further disintegrates into fine particles, which are carried out of the dense phase area by the hot flue gas and enter the dilute phase area to continue burning. The low-temperature combustion process (850-950℃) effectively controls the formation of thermal NOX. Since the media material is composed of quartz sand and limestone, the limestone is calcined at high temperature to generate CaO, and CaO reacts with SO2 to further generate CaSO4, which inhibits the emission of SO2. The operating temperature of the combustion device is the optimal operating temperature for CaO desulfurization, which can effectively reduce the emission of SO2.

[0068] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water-coal slurry feeding device for a multi-pass circulating fluidized bed boiler, comprising a shotcrete box (1) and a slurry supply pipe (2) located inside the shotcrete box (1), characterized in that: A discharge plate (3) is arranged on the right side of the slurry supply pipe (2), a movable frame (4) is arranged on the right side of the discharge plate (3), a spray hole (5) is opened at the right end of the spray box (1), and an adjustment component (6) is arranged in the spray hole (5); The adjustment component (6) comprises a fixed disk (61) fixed inside the spray hole (5), a gear ring (62) rotatably connected inside the fixed disk (61), four groups of first gears (63) meshingly connected inside the gear ring (62), the inner end of the first gear (63) meshingly connected to a first gear rod (64), the other end of the first gear rod (64) fixedly connected to an adjustment plate (65) slidably mounted on the inner wall of the fixed disk (61), the four groups of adjustment plates (65) are staggered, and the inner ends form an adjustment groove (66), a through groove (67) is formed on the surface of the fixed disk (61), and the position of the groove (67) corresponds to the position of the adjustment groove (66), an arc groove (68) is formed on a side of the fixed disk (61) close to the movable frame (4), and a control rod (69) is slidably connected inside the arc groove (68), one end of the control rod (69) is fixedly connected to the gear ring (62), and the other end is movably connected to the movable frame (4) through a transmission member; The movable frame (4) is provided with a delivery pipe (41) corresponding to the spray hole (5); a shaft sleeve (42) is rotatably provided on the delivery pipe (41); the inner and outer walls of the shaft sleeve (42) are respectively provided with hydraulic blades (44) and pneumatic blades (43); the movable frame (4) is provided with a motor (415) for driving the shaft sleeve (42) to rotate; a scraper (45) is fixedly connected to the inner wall of the shaft sleeve (42), and the scraper (45) is slidably fitted with the inner wall of the delivery pipe (41); The outer wall of the shaft sleeve (42) is fixedly connected to a cross bar (46), the outer wall of the cross bar (46) is rotatably connected to a knocking rod (47), the top of the cross bar (46) is fixedly connected to a top plate (48), the bottom end of the top plate (48) is fixedly connected to a second damping spring (49), the other end of the second damping spring (49) is fixedly connected to the knocking rod (47), and the outer wall of the conveying pipe (41) is fixedly connected to a plurality of lifting blocks (419), the position of the lifting blocks (419) corresponds to the position of the knocking rod (47), and the plurality of lifting blocks (419) are arranged in a circular array; The outer wall of the delivery pipe (41) is laterally slidably connected to a conical cylinder (410); a third damping spring (413) is provided on a side of the conical cylinder (410) away from the wind blades (43); an opening direction of the conical cylinder (410) corresponds to the position of the wind blades (43); a push plate (411) is fixedly connected to the bottom end of the outer wall of the conical cylinder (410); and a step (412) is provided on one side of the push plate (411).

2. The water-coal slurry feeding device for a multi-pass circulating fluidized bed boiler according to claim 1, characterized in that: The control component comprises a second gear (610) rotatably mounted inside the spray box (1); the upper and lower ends of the second gear (610) are respectively meshedly connected with a second gear rod (611) and a third gear rod (613); the second gear rod (611) and the third gear rod (613) are both slidably mounted on the spray box (1) in cooperation with a fifth damping spring (616); a rectangular frame (612) is fixedly connected to the top of the second gear rod (611); an end of the control rod (69) is located in the rectangular frame (612); one end of the third gear rod (613) is fixedly connected to a second connecting rod (614); the other end of the second connecting rod (614) is fixedly connected to a positioning block (615); and the position of the positioning block (615) corresponds to the position of the moving frame (4).

3. The water-coal slurry feeding device for a multi-pass circulating fluidized bed boiler according to claim 1, characterized in that: The outer wall of the slurry supply pipe (2) is slidably connected to a baffle plate (21), and the baffle plate (21) is slidably mounted on the inner end of the shotcrete box (1). A first connecting rod (22) is fixedly connected between the baffle plate (21) and the discharge plate (3), and the first connecting rod (22) is slidably mounted on the shotcrete box (1), and a first damping spring (23) is sleeved on the outer wall of the first connecting rod (22).

4. The water-coal slurry feeding device for a multi-pass circulating fluidized bed boiler according to claim 1, characterized in that: A slurry discharge hole (31) is provided on the surface of the discharge plate (3), and the specifications of the slurry discharge hole (31) are mutually compatible with the specifications of the conveying pipe (41). A trapezoidal block (32) is fixedly connected to the side of the discharge plate (3) close to the movable frame (4), and an inclined groove (414) mutually compatible with the trapezoidal block (32) is provided on the surface of the movable frame (4).

5. The water-coal slurry feeding device for a multi-pass circulating fluidized bed boiler according to claim 4, characterized in that: The outer end of the movable frame (4) is slidably connected to the inner wall of the shotcrete box (1) via a slider (418); a fourth damping spring (416) is fixedly connected to the inner wall of the shotcrete box (1); a stopper (417) is fixedly connected to the other end of the fourth damping spring (416); and the stopper (417) is slidably mounted on the shotcrete box (1).

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