A fluidized bed boiler bottom material filling device

Abstract

The present invention relates to the technical field of boiler filling, and particularly to a bottom material filling device for a circulating fluidized bed boiler. It includes: a base; a fluidized bed boiler disposed on the base, and the base is fixedly connected with a fixed frame; a sliding shell slidably connected to the fixed frame, and the sliding shell is slidably connected to the fluidized bed boiler; a first auger rotatably connected to the inside of the sliding shell with limited movement; a power assembly disposed on the fixed frame; a first driving motor fixedly connected to the fixed frame; a reciprocating lead screw fixedly connected to the output shaft of the first driving motor, and the reciprocating lead screw is threadedly connected to the sliding shell. The present invention drives the discharge port of the sliding shell to perform a linear reciprocating motion within the fluidized bed boiler through the reciprocating lead screw, so that the bottom material is evenly laid in the furnace of the fluidized bed boiler, ensuring uniform internal temperature during the operation of the fluidized bed boiler and improving the operation stability of the fluidized bed boiler.

Description

Technical Field

[0001] The present invention relates to the technical field of boiler filling, and particularly relates to a bottom material filling device for a circulating fluidized bed boiler. Background Art

[0002] A circulating fluidized bed boiler is an efficient combustion device. The circulating fluidized bed boiler mixes fuel and bottom material and makes them in a fluidized state under the action of air flow, so as to achieve efficient combustion. Its advantages include high combustion efficiency, low pollutant emissions, strong flexibility, and easy treatment of ash and slag, etc. It is widely used in industries such as electric power, chemical industry, and papermaking. Before the circulating fluidized bed boiler is used, it is first necessary to inject the bottom material into the furnace of the circulating fluidized bed boiler to establish a stable initial combustion environment and ensure the smooth start and operation of the boiler. However, most of the existing bottom material filling devices are spliced with a screw conveyor on one side of the circulating fluidized bed boiler. When the bottom material is transported, the bottom material transported by the screw conveyor will accumulate on one side of the furnace of the circulating fluidized bed boiler, resulting in the height of the bottom material on the side of the furnace close to the screw conveyor being greater than the height of the bottom material on the side far from the screw conveyor, that is, the bottom material is unevenly distributed in the furnace, and further resulting in fluctuations in the internal combustion temperature during the initial operation of the circulating fluidized bed boiler, affecting the stable operation of the circulating fluidized bed boiler. Summary of the Invention

[0003] In order to overcome the above-mentioned disadvantages mentioned in the background art, the present invention provides a bottom material filling device for a circulating fluidized bed boiler.

[0004] The technical implementation solution of the present invention is: A bottom material filling device for a circulating fluidized bed boiler, comprising:

[0005] A base;

[0006] A fluidized bed boiler, arranged on the base, and the base is fixedly connected with a fixing frame;

[0007] A sliding shell, slidably connected to the fixing frame, the sliding shell is slidably connected to the fluidized bed boiler, and the sliding shell penetrates through the fluidized bed boiler;

[0008] A first auger, rotatably connected to the inside of the sliding shell with a limit;

[0009] A power assembly, arranged on the fixing frame, for driving the first auger to rotate and convey materials;

[0010] A first driving motor, fixedly connected to the fixing frame;

[0011] A reciprocating lead screw, fixedly connected to the output shaft of the first driving motor, and the reciprocating lead screw is threadedly connected to the sliding shell;

[0012] The bulk material component is arranged inside the fluidized bed boiler and is used for evenly distributing the materials conveyed into the fluidized bed boiler by the sliding shell.

[0013] More preferably, the bulk material component includes:

[0014] The bulk material shell is fixedly connected and communicated with the sliding shell. The bulk material shell is located inside the fluidized bed boiler, and a plurality of discharge holes are arranged on the bulk material shell;

[0015] The second auger is rotatably connected inside the bulk material shell;

[0016] The spline shaft is spline-connected inside the second auger and penetrates through the second auger to the outside of the bulk material shell;

[0017] The driving component is arranged on the spline shaft and is used for driving the second auger to rotate.

[0018] More preferably, the second auger is composed of a rotating shaft and two symmetrically distributed spiral plates, and is used for conveying the materials in the sliding shell in two directions.

[0019] More preferably, the driving component includes:

[0020] The transmission gear is fixedly connected to the spline shaft;

[0021] There are two rack frames, both of which are fixedly connected to the inside of the fluidized bed boiler, and both of the two rack frames make the transmission gear rotate in one direction;

[0022] The switching component is arranged on the spline shaft and is used for making the spline shaft slide along the second auger.

[0023] More preferably, the two rack frames are respectively located on both sides of the transmission gear, and the two rack frames are staggeredly distributed, so that the transmission gear can only be engaged with one of the rack frames at the same time.

[0024] More preferably, the switching component includes:

[0025] There are two extrusion blocks, which are fixedly connected to the inside of the fluidized bed boiler;

[0026] The pushing block is fixedly connected to the spline shaft, and both of the two extrusion blocks are used for extruding the pushing block;

[0027] The stabilizing component is arranged on the bulk material shell and is used for stabilizing the state of the spline shaft.

[0028] More preferably, the stabilizing component includes:

[0029] The clamping shaft is slidably connected to the bulk material shell;

[0030] A first elastic element is arranged between the card shaft and the bulk material shell;

[0031] The spline shaft is provided with two clamping grooves, and the card shaft limits the spline shaft through the clamping grooves.

[0032] More preferably, it further includes:

[0033] An adjusting assembly is arranged on the bulk material shell and is used to adjust the aperture of the discharge hole on the bulk material shell. The adjusting assembly includes:

[0034] A plugging frame is slidably connected to the bulk material shell, and the plugging frame slides along the bulk material shell to adjust the aperture of the discharge hole;

[0035] A second elastic element is arranged between the plugging frame and the bulk material shell;

[0036] A connecting rod is fixedly connected to the plugging frame;

[0037] A driving assembly is arranged on the fluidized bed boiler and is used to adjust the sliding distance of the plugging frame along the bulk material shell.

[0038] More preferably, the driving assembly includes:

[0039] A second driving motor is fixedly connected to the fluidized bed boiler;

[0040] An extrusion rod is fixedly connected to the output shaft of the second driving motor and is rotationally connected to the fluidized bed boiler. The extrusion rod is located inside the fluidized bed boiler, and the connecting rod is in contact with the outside of the extrusion rod.

[0041] More preferably, the extrusion rod is a special-shaped rod composed of an extrusion ring and a main shaft. The extrusion ring is provided with symmetrically distributed spiral cross-sections, and the thickness of the extrusion ring gradually increases from one side to the other side.

[0042] The present invention has the following advantages: 1. The present invention drives the discharge port of the sliding shell to perform linear reciprocating motion in the fluidized bed boiler through a reciprocating lead screw, so that the bottom material is evenly laid in the furnace of the fluidized bed boiler, ensuring uniform internal temperature during the operation of the fluidized bed boiler and improving the operation stability of the fluidized bed boiler.

[0043] 2. By switching the positions of the transmission gears, the transmission gears are respectively engaged with the upper and lower rack frames, so that the rotation direction of the second auger always remains the same, ensuring that the conveying direction of the bottom material inside it remains consistent and ensuring the uniformity of the bottom material filling.

[0044] 3. The stability of the spline shaft is improved by the cooperation of the card shaft and the two card slots, avoiding the sliding of the spline shaft along the second auger during the movement of the material scattering shell, resulting in the separation of the transmission gear and the engaged rack, causing the second auger to be unable to rotate and convey the bottom material, and affecting the evenness of the bottom material filling.

[0045] 4. By increasing the aperture of the discharge hole on the material scattering shell in the middle area of the fluidized bed boiler, the filling content of the bottom material of the material scattering shell per unit time is increased, ensuring that the bottom material liquid level in the furnace of the fluidized bed boiler is in a relatively flat and uniform state, and guaranteeing the stable operation of the fluidized bed boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0047] Figure 2 is a three-dimensional structural sectional view of the sliding shell of the present invention;

[0048] Figure 3 is a three-dimensional structural sectional view of the fluidized bed boiler of the present invention;

[0049] Figure 4 is a three-dimensional structural sectional view of the material scattering shell of the present invention;

[0050] Figure 5 is a three-dimensional structural schematic diagram of the extrusion block and the pushing block of the present invention;

[0051] Figure 6 is a three-dimensional structural schematic diagram of the extrusion block of the present invention;

[0052] Figure 7 is a three-dimensional structural schematic diagram of the plugging frame of the present invention;

[0053] Figure 8 is a three-dimensional structural schematic diagram of the second elastic element and the connecting rod of the present invention;

[0054] Figure 9 is a three-dimensional structural schematic diagram of the extrusion ring and the main shaft of the present invention;

[0055] Figure 10 is a side view schematic diagram of the extrusion ring and the main shaft of the present invention.

[0056] Meanings of the reference numerals in the drawings: 1: base; 2: fluidized bed boiler; 3: fixing frame; 4: sliding shell; 5: first auger; 6: power assembly; 7: first driving motor; 8: reciprocating lead screw; 201: bulk material shell; 202: second auger; 203: spline shaft; 204: transmission gear; 205: rack frame; 206: extrusion block; 207: pushing block; 301: clamping shaft; 302: first elastic element; 303: clamping groove; 401: plugging frame; 402: second elastic element; 403: connecting rod; 404: second driving motor; 405: extrusion rod; 4501: extrusion ring; 4502: main shaft. Detailed implementation manners

[0057] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings. It is hereby declared that the directional terms such as up, down, left, right, front, back, inside and outside that appear or will appear in the text of the present invention are only based on the drawings of the present invention, and they do not specifically limit the present invention.

[0058] Existing bottom material filling equipment usually connects a screw conveyor to one side of a circulating fluidized bed boiler. During the bottom material conveying process, the screw conveyor will accumulate the bottom material on one side of the furnace of the circulating fluidized bed boiler, resulting in the height of the bottom material on the side close to the screw conveyor being higher than that on the side far from the screw conveyor. This uneven bottom material distribution will cause a height difference in the bottom material in the furnace, and further, when the boiler starts to operate, the internal combustion temperature will fluctuate, affecting the stable operation of the circulating fluidized bed boiler.

[0059] A bottom material filling equipment for a circulating fluidized bed boiler, as Figures 1-3 shown, includes: a base 1; a fluidized bed boiler 2, arranged on the base 1, and the base 1 is fixedly connected with a fixing frame 3; a sliding shell 4, slidably connected to the fixing frame 3, the sliding shell 4 is slidably connected with the fluidized bed boiler 2, and the sliding shell 4 penetrates through the fluidized bed boiler 2; a first auger 5, limited and rotatably connected inside the sliding shell 4; a power assembly 6, arranged on the fixing frame 3, for driving the first auger 5 to rotate and convey materials; a first driving motor 7, fixedly connected to the fixing frame 3, a reciprocating lead screw 8, fixedly connected to the output shaft of the first driving motor 7, and the reciprocating lead screw 8 is threadedly connected with the sliding shell 4; a bulk material distributing assembly, arranged inside the fluidized bed boiler 2, for evenly distributing the materials conveyed by the sliding shell 4 into the fluidized bed boiler 2.

[0060] In the above solution, the fluidized bed boiler 2 consists of multiple key components, including a furnace, a wind distribution plate, a cyclone separator, a return material system and other components. The above are all prior arts and will not be elaborated here. The fixed frame 3 is made of high-strength structural steel and has sufficient support strength and structural stability. The upper side of the end of the sliding shell 4 far from the fluidized bed boiler 2 is connected to an external bottom material storage device through a corrugated pipe, and the corrugated pipe has a certain length to facilitate the change of the position of the sliding shell 4. The power assembly 6 consists of a servo motor, a first gear and a second gear, and their connection relationship is as follows: The servo motor is fixedly connected to the fixed frame 3, the output shaft of the servo motor is fixedly connected with the first gear, and the fixed frame 3 is rotationally connected with a second gear meshing with the first gear in a limited way. The second gear is splined to the first auger 5. The length of the first auger 5 is more than twice that of the sliding shell 4, and the part located outside the sliding shell 4 is all a spline part to prevent the second gear from separating from the spline part outside the first auger 5. The length of the reciprocating lead screw 8 is the same as the width of the furnace at the bottom of the fluidized bed boiler 2. The length of the sliding shell 4 is greater than the length of the reciprocating lead screw 8 to ensure that the external corrugated pipe does not contact the inner wall of the fluidized bed boiler 2. The discharge port of the sliding shell 4 is driven by the reciprocating lead screw 8 to perform a linear reciprocating motion in the fluidized bed boiler 5, so that the bottom material is evenly laid in the furnace of the fluidized bed boiler 2, ensuring uniform internal temperature during the operation of the fluidized bed boiler 2 and improving the operation stability of the fluidized bed boiler 2.

[0061] Specifically, as Figures 3-5 shown, the bulk material assembly includes: a bulk material shell 201, fixedly connected and communicating with the sliding shell 4. The bulk material shell 201 is located inside the fluidized bed boiler 2, and the bulk material shell 201 is provided with a number of discharge holes; a second auger 202, rotatably connected inside the bulk material shell 201; a spline shaft 203, splined inside the second auger 202 and penetrating through the second auger 202 to the outside of the bulk material shell 201; a driving assembly, arranged on the spline shaft 203 for driving the second auger 202 to rotate. The second auger 202 consists of a rotating shaft and two symmetrically distributed spiral plates for conveying the material in the sliding shell 4 in two directions.

[0062] In the above solution, the butt joint and communication part of the bulk material shell 201 and the sliding shell 4 is located in the middle of them. The discharge holes at the bottom of the bulk material shell 201 are equally spaced, and the number can be changed according to the actual situation to improve the evenness of the bottom material filling. The central axis of the bulk material shell 201, the central axis of the second auger 202 and the central axis of the spline shaft 203 coincide. The length of the bulk material shell 201 is the same as the length of the second auger 202, and the length of the spline shaft 203 is greater than the length of the second auger 202.

[0063] Specifically, as Figure 3 and Figure 4As shown in the figure, the drive assembly includes: a transmission gear 204 fixedly connected to a spline shaft 203; two rack frames 205 both fixedly connected to the inside of the fluidized bed boiler 2, and both of the two rack frames 205 enable the transmission gear 204 to rotate unidirectionally; a switching assembly disposed on the spline shaft 203 for sliding the spline shaft 203 along the second auger 202; the two rack frames 205 are respectively located on both sides of the transmission gear 204, and the two rack frames 205 are staggeredly distributed, so that the transmission gear 204 can only be engaged with one rack frame 205 at the same time.

[0064] In the above solution, wear-resistant coatings such as hard chromium coatings and nickel-based alloy coatings are electroplated on the outsides of the transmission gear 204 and the two rack frames 205 to improve the surface hardness and wear resistance. The two rack frames 205 are respectively located on the upper and lower sides of the transmission gear 204, and the lower rack frame 205 is close to the front side of the fluidized bed boiler 2, and the upper rack frame 205 is close to the rear side of the fluidized bed boiler 2 (taking Figure 3 the direction as an example), and the stagger distance between the two rack frames 205 is greater than the thickness of the transmission gear 204 to prevent the situation that the transmission gear 204 is stuck when docking with the two rack frames 205 at the same time.

[0065] Specifically, as Figures 3-6 shown, the switching assembly includes: two extrusion blocks 206 fixedly connected to the inside of the fluidized bed boiler 2; a pushing block 207 fixedly connected to the spline shaft 203, and both of the two extrusion blocks 206 are used to extrude the pushing block 207; a stabilizing assembly disposed on the bulk material shell 201 for stabilizing the state of the spline shaft 203.

[0066] In the above solution, both of the two extrusion blocks 206 have arc-shaped surfaces, the two extrusion blocks 206 are centrosymmetrically distributed, the pushing block 207 is composed of two identical truncated cones spliced together, and the joint surface of the two truncated cones is the large-diameter side. The arc-shaped surface of the extrusion block 206 is in contact with the side surface of the truncated cone of the pushing block 207, so that the extrusion block 206 drives the spline shaft 203 to reciprocate along the second auger 202 through the pushing block 207. Wear-resistant coatings such as hard chromium coatings and nickel-based alloy coatings are electroplated on the outsides of the two extrusion blocks 206 and the pushing block 207 to improve the surface hardness and wear resistance.

[0067] Specifically, as Figure 5 shown, the stabilizing assembly includes: a clamping shaft 301 slidably connected to the bulk material shell 201; a first elastic element 302 disposed between the clamping shaft 301 and the bulk material shell 201; the spline shaft 203 is provided with two clamping grooves 303, and the clamping shaft 301 limits the spline shaft 203 through the clamping grooves 303.

[0068] In the above solution, the bottom of the clamping shaft 301 is provided with symmetrically distributed inclined surfaces. The first elastic element 302 is a tension spring, which is used to drive the clamping shaft 301 to reset. The clamping groove 303 is an annular groove and the cross-sectional shape is an isosceles trapezoid, and the two waists of the isosceles trapezoid are attached to the inclined surfaces of the clamping shaft 301. The cooperation between the clamping shaft 301 and the two clamping grooves 303 improves the stability of the spline shaft 203 during rotation.

[0069] Working principle: When it is necessary to inject the bottom material into the fluidized bed boiler 2, the external bottom material storage device is opened to inject the bottom material into the sliding shell 4. At the same time, the servo motor is started, so that the servo motor drives the second gear to rotate through the first gear, and the second gear drives the first auger 5 to rotate. The first auger 5 drives the bottom material in the sliding shell 4 to gradually enter the middle of the material scattering shell 201. At the same time, the first driving motor 7 is started, so that the output shaft of the first driving motor 7 drives the reciprocating lead screw 8 to rotate. The reciprocating lead screw 8 drives the sliding shell 4 to slide inward along the fluidized bed boiler 2, so that the sliding shell 4 drives the material scattering shell 201 to move synchronously. The material scattering shell 201 drives the second auger 202 inside to move synchronously. The second auger 202 drives the spline shaft 203 inside to move synchronously. The spline shaft 203 drives the transmission gear 204 to move along the adjacent rack 205, so that the transmission gear 204 rotates self. The transmission gear 204 drives the second auger 202 to rotate through the spline shaft 203. The second auger 202 conveys the bottom material entering the middle of the material scattering shell 201 to both sides. At the same time, the bottom material falls into the bottom of the furnace of the fluidized bed boiler 2 along several discharge holes on the material scattering shell 201. In this way, until the material scattering shell 201 moves to the other side of the fluidized bed boiler 2. At this time, the reciprocating lead screw 8 drives the sliding shell 4 to move to the limit position, and the reciprocating lead screw 8 starts to drive the sliding shell 4 to move in the reverse direction. This cycle continues until the bottom material filling is completed, so that the reciprocating lead screw 8 drives the material scattering shell 201 to perform a linear reciprocating motion in the fluidized bed boiler 2 through the sliding shell 4, and the material scattering shell 201 continuously fills the bottom material into the fluidized bed boiler 2, so that the bottom material is evenly laid in the furnace of the fluidized bed boiler 2, ensuring that the internal temperature of the fluidized bed boiler 2 is uniform during operation and improving the operation stability of the fluidized bed boiler 2.

[0070] During the process of the reciprocating lead screw 8 driving the material scattering shell 201 to perform a linear reciprocating motion in the fluidized bed boiler 2 through the sliding shell 4, the material scattering shell 201 will switch directions on both sides of the fluidized bed boiler 2. During this process, the material scattering shell 201 drives the pushing block 207 to move synchronously through the internal spline shaft 203, so that the pushing block 207 contacts and is squeezed by the squeezing blocks 206 on both sides of the fluidized bed boiler 2, so as to Figure 3 and Figure 4Taking the rightward movement of the pushing block 207 driven by the spline shaft 203 inside the bulk material shell 201 as an example, during this process, the transmission gear 204 drives the second auger 202 to rotate clockwise. When the pushing block 207 contacts the extrusion block 206 on the right side, the transmission gear 204 separates from the rack 205 below, but the two are still in the same plane. At this time, the front circular table surface of the pushing block 207 is extruded by the extrusion block 206 on the right side, causing the pushing block 207 to drive the spline shaft 203 to slide backward along the second auger 202. The spline shaft 203 drives the transmission gear 204 to slide synchronously, causing the transmission gear 204 to be misaligned with the rack 205 below, so that the transmission gear 204 switches from the plane where the lower rack 205 is located to the plane where the upper rack 205 is located. At this time, the sliding shell 4 moves to the limit position at the right end of the reciprocating lead screw 8 and starts to switch directions, that is, the bulk material shell 201 switches directions synchronously. At this time, the bulk material shell 201 drives the spline shaft 203 inside to move leftward. The transmission gear 204 meshes with the upper rack 205, and the transmission gear 204 moves leftward along the upper rack 205. At this time, the transmission gear 204 drives the second auger 202 to still rotate clockwise. This continues until the pushing block 207 contacts the extrusion block 206 on the left side. This cycle continues until the bottom material filling is completed. By switching the position of the transmission gear 204, the transmission gear 204 meshes with the upper and lower racks 205 respectively, so that the rotation direction of the second auger 202 always remains the same, ensuring that the conveying direction of the bottom material inside it remains consistent and ensuring the uniformity of the bottom material filling.

[0071] When the spline shaft 203 slides along the second auger 202, the two card slots 303 on the spline shaft 203 will drive the card shaft 301 to move upward synchronously. The card slot 303 will squeeze the card shaft 301 to move upward, causing the card shaft 301 to slide upward along the bulk material shell 201. At the same time, the first elastic element 302 is stretched. This continues until another card shaft 301 slides into another card slot 303. At this time, the first elastic element 302 pulls the card shaft 301 to reset and insert it into the adjacent card slot 303, making the card shaft 301 cooperate with the card slot 303 to improve the stability of the spline shaft 203, preventing the spline shaft 203 from sliding along the second auger 202 during the movement of the bulk material shell 201, resulting in the separation of the transmission gear 204 from the meshing rack 205, causing the second auger 202 to be unable to rotate and convey the bottom material, affecting the uniformity of the bottom material filling.

[0072] After the bottom material filling is completed, the reciprocating lead screw 8 drives the bulk material shell 201 to reset to the initial state through the sliding shell 4. Then, the servo motor, the first drive motor 7 and the external bottom material storage device are turned off, and then the fluidized bed boiler 2 is started for combustion.

[0073] In a further embodiment, such as Figure 7 and Figure 8As shown in the figure, it further includes an adjusting component, which is arranged on the bulk material shell 201 and used to adjust the aperture of the discharge hole on the bulk material shell 201. The adjusting component includes a plugging frame 401, which is slidably connected to the bulk material shell 201. The plugging frame 401 slides along the bulk material shell 201 to adjust the aperture of the discharge hole; a second elastic element 402, which is arranged between the plugging frame 401 and the bulk material shell 201; a connecting rod 403, which is fixedly connected to the plugging frame 401; and a driving component, which is arranged on the fluidized bed boiler 2 and used to adjust the sliding distance of the plugging frame 401 along the bulk material shell 201.

[0074] In the above solution, the plugging frame 401 is composed of a connecting frame and arc-shaped sealing plates with the same number as the discharge holes. A number of arc-shaped sealing plates are staggered with the discharge holes. And in the initial state, the plugging frame 401 is in a semi-plugging state for the discharge holes on the bulk material shell 201. The second elastic element 402 is a spring, which is in a compressed state initially and used to drive the plugging frame 401 to reset. The plugging frame 401 slides along the outside of the bulk material shell 201 to adjust the aperture of the discharge hole.

[0075] Specifically, as Figure 2 and Figures 8-10 shown in the figure, the driving component includes a second driving motor 404, which is fixedly connected to the fluidized bed boiler 2; an extrusion rod 405, which is fixedly connected to the output shaft of the second driving motor 404 and is rotationally connected to the fluidized bed boiler 2. The extrusion rod 405 is located inside the fluidized bed boiler 2, and the connecting rod 403 is in contact with the outside of the extrusion rod 405; the extrusion rod 405 is a special-shaped rod composed of an extrusion ring 4501 and a main shaft 4502. The extrusion ring 4501 is provided with symmetrically distributed spiral cross-sections, and the thickness of the extrusion ring 4501 gradually increases from one side to the other side.

[0076] In the above solution, the second driving motor 404 is fixedly connected to the outside of the fluidized bed boiler 2, and there is a certain distance between the two to avoid the high temperature in the fluidized bed boiler 2 from being conducted to the second driving motor 404 and causing damage. At the same time, the second driving motor 404 is a high-temperature resistant motor. The outside of the extrusion rod 405 and the connecting rod 403 are both electroplated with wear-resistant coatings, such as hard chromium coatings and nickel-based alloy coatings, to improve the surface hardness and anti-wear ability. After the extrusion ring 4501 is "unfolded", it is an isosceles trapezoid. The thickness of the extrusion ring 4501 gradually decreases from its upper base to its lower base, and the two waists of the extrusion ring 4501 cooperate with the main shaft 4502 to form a gentle inclined surface, which is convenient for the connecting rod 403 to slide from the outside of the main shaft 4502 to the outside of the extrusion ring 4501. And in the initial state, the upper base of the extrusion ring 4501 is close to the connecting rod 403, that is, the thickest part of the extrusion ring 4501 is close to the connecting rod 403, and the width of the upper base of the extrusion ring 4501 is smaller than the width of the bottom of the furnace, and the width of the lower base of the extrusion ring 4501 is smaller than the maximum width of the furnace.

[0077] Most of the bottom of the existing circulating fluidized bed boiler is flared, that is, the cross-section is an isosceles trapezoid placed in reverse, which is used to evenly distribute the air flow, facilitate slag discharge and improve the combustion rate. When the base material is loaded into the circulating fluidized bed boiler from the bulk material shell 201, the base material falling on the inclined surface at the bottom of the furnace (the waist of the isosceles trapezoid structure placed in reverse at the bottom of the furnace, which will be referred to as such hereinafter) will roll to the bottom, resulting in the two sides of the base material loaded in the furnace being larger than the middle. Therefore, when the bulk material shell 201 reciprocates to load the base material into the furnace of the fluidized bed boiler 2, the bulk material shell 201 will drive the plugging frame 401 thereon to move synchronously. The plugging frame 401 drives the connecting rod 403 to slide along the outside of the extrusion rod 405. At this time, the connecting rod 403 slides along the main shaft 4502, and the aperture of the discharge hole of the bulk material shell 201 always remains unchanged. So until the bulk material shell 201 is no longer above the inclined surface of the fluidized bed boiler 2 and has traveled a specific distance, at this time, the bulk material shell 201 drives the connecting rod 403 to slide from the main shaft 4502 to the extrusion ring 4501 through the plugging frame 401. The extrusion ring 4501 squeezes the connecting rod 403 forward, causing the connecting rod 403 to drive the plugging frame 401 to slide along the bulk material shell 201, and at the same time increasing the aperture of the discharge hole on the bulk material shell 201, thereby increasing the unit time input amount of the bulk material shell 201 into the furnace. At the same time, the second elastic element 402 is further compressed, and the rotation speed of the servo motor is increased, so that the content of the base material entering the bulk material shell 201 from the sliding shell 4 increases, so as to ensure the increased content of the base material input by the bulk material shell 201. So until the connecting rod 403 separates from the extrusion ring 4501 and fits with the main shaft 4502, the second elastic element 402 resets and pushes the plugging frame 401 to reset, restoring the discharge aperture of the bulk material shell 201. At the same time, the rotation speed of the servo motor returns to the initial state, and then the rotation speed of the servo motor starts to put the base material on the other inclined surface. So until the bulk material shell 201 travels a stroke (the bulk material shell 201 goes from one side of the fluidized bed boiler 2 to the other side), and so on in a cycle. By increasing the aperture of the discharge hole on the bulk material shell 201 in the middle area of the fluidized bed boiler 2, the loading content of the base material of the bulk material shell 201 is increased, ensuring that the base material liquid level in the furnace of the fluidized bed boiler 2 is in a relatively flat and uniform state, and ensuring the stable operation of the fluidized bed boiler 2.

[0078] As the filling of the bottom material progresses, the height of the bottom material gradually increases. At this time, the area of the upper side of the bottom material gradually increases, which in turn causes the stacking height and range of the bottom material on both sides of the furnace bottom to gradually decrease as the height of the bottom material rises. Therefore, every time the bulk material shell 201 completes a stroke and switches the movement direction, the second drive motor 404 drives the extrusion rod 405 to rotate. The extrusion rod 405 drives the extrusion ring 4501 to rotate synchronously. When the extrusion ring 4501 rotates, the distance on the side close to the connecting rod 403 increases, thereby extending the sliding distance between the extrusion ring 4501 and the connecting rod 403. At the same time, the extrusion distance between the extrusion ring 4501 and the docking rod 403 is reduced, that is, the range of the middle area where the bulk material shell 201 increases the input amount of the bottom material per unit time is expanded, and at the same time, the increase value of the input amount per unit time of the bulk material shell 201 in the middle area of the fluidized bed boiler 2 is reduced, ensuring the uniformity of the filling of the bottom material at the furnace bottom. This continues until the filling of the bottom material is completed. Then, after the bulk material shell 201 returns to the initial state, the output shaft of the second drive motor 404 drives the extrusion rod 405 to reset to the initial state. When it is necessary to fill the bottom material in the furnace again, the above steps are repeated.

[0079] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention. The purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A circulating fluidized bed boiler bottom material filling device, characterized in that: Included are: Base (1); A fluidized bed boiler (2) is arranged on the base (1), and the base (1) is fixedly connected to a fixing frame (3); A sliding shell (4) is slidably connected to the fixing frame (3), the sliding shell (4) is slidably connected to the fluidized bed boiler (2), and the sliding shell (4) passes through the fluidized bed boiler (2); A first auger (5) is connected to the interior of the sliding shell (4) in a limited rotation manner; A power assembly (6) is disposed on the fixing frame (3) and is used to drive the first auger (5) to rotate and transport materials; A first drive motor (7) fixedly connected to the fixing frame (3); A reciprocating screw (8) fixedly connected to the output shaft of the first drive motor (7), the reciprocating screw (8) being threadedly connected to the sliding shell (4); A bulk material assembly is arranged in the fluidized bed boiler (2) and is used to evenly distribute the material transported by the sliding shell (4) into the fluidized bed boiler (2); the bulk material assembly comprises: a bulk material shell (201) fixedly connected to and in communication with the sliding shell (4), the bulk material shell (201) being located in the fluidized bed boiler (2), and the bulk material shell (201) being provided with a plurality of discharge holes; Also included are: An adjustment component is arranged on the bulk material shell (201) and is used to adjust the aperture of the discharge hole on the bulk material shell (201), wherein the adjustment component comprises: A blocking frame (401) is slidably connected to the bulk material shell (201), and the blocking frame (401) slides along the bulk material shell (201) to adjust the aperture of the discharge hole; A second elastic element (402) is arranged between the blocking frame (401) and the bulk material shell (201); A connecting rod (403) fixedly connected to the blocking frame (401); A driving assembly, arranged on the fluidized bed boiler (2), and used for adjusting the sliding distance of the blocking frame (401) along the bulk material shell (201); The drive assembly comprises: A second driving motor (404) fixedly connected to the fluidized bed boiler (2); an extrusion rod (405) fixedly connected to the output shaft of the second drive motor (404) and rotatably connected to the fluidized bed boiler (2); the extrusion rod (405) is located inside the fluidized bed boiler (2); and the connecting rod (403) is in contact with the outside of the extrusion rod (405); The extrusion rod (405) is a special-shaped rod composed of an extrusion ring (4501) and a main shaft (4502); the extrusion ring (4501) is provided with symmetrically distributed spiral sections, and the thickness of the extrusion ring (4501) gradually increases from one side to the other side; the extrusion ring (4501) is an isosceles trapezoid when unfolded.

2. The circulating fluidized bed boiler bottom material filling device according to claim 1 is characterized in that: The bulk material assembly comprises: A second auger (202) rotatably connected to the interior of the bulk material shell (201); A spline shaft (203) spline-connected to the inside of the second auger (202) and penetrating the second auger (202) to the outside of the bulk material shell (201); A driving assembly is arranged on the spline shaft (203) and is used to drive the second auger (202) to rotate.

3. The bottom material filling device for a circulating fluidized bed boiler according to claim 2 is characterized in that: The second auger (202) is composed of a rotating shaft and two symmetrically distributed spiral plates, and is used to transport the material in the sliding shell (4) in two directions.

4. The bottom material filling device for a circulating fluidized bed boiler according to claim 3 is characterized in that: The drive assembly comprises: A transmission gear (204) fixedly connected to the spline shaft (203); There are two rack racks (205), both of which are fixedly connected to the inside of the fluidized bed boiler (2), and both of the two rack racks (205) enable the transmission gear (204) to rotate in one direction; A switching component is arranged on the spline shaft (203) and is used to make the spline shaft (203) slide along the second auger (202).

5. The circulating fluidized bed boiler bottom material filling device according to claim 4 is characterized in that: The two rack racks (205) are respectively located on both sides of the transmission gear (204), and the two rack racks (205) are staggered so that the transmission gear (204) can only mesh with one rack rack (205) at a time.

6. The bottom material filling device for a circulating fluidized bed boiler according to claim 4 is characterized in that: The switching component includes: There are two extrusion blocks (206) fixedly connected to the fluidized bed boiler (2); A pushing block (207) is fixedly connected to the spline shaft (203), and the two extrusion blocks (206) are used to extrude the pushing block (207); A stabilizing component is arranged on the bulk material shell (201) and is used to stabilize the state of the spline shaft (203).

7. The bottom material filling device for a circulating fluidized bed boiler according to claim 6 is characterized in that: The stabilizing component comprises: A clamping shaft (301) slidably connected to the bulk material shell (201); A first elastic element (302) is arranged between the clamping shaft (301) and the bulk material shell (201); The spline shaft (203) is provided with two clamping grooves (303), and the clamping shaft (301) limits the position of the spline shaft (203) through the clamping grooves (303).

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