Bottom material filling equipment for circulating fluidized bed boiler

Abstract

The invention relates to the technical field of boiler filling, in particular to circulating fluidized bed boiler backing material filling equipment. Comprising a base; the fluidized bed boiler is arranged on the base, and the base is fixedly connected with a fixing frame; the sliding shell is connected to the fixing frame in a sliding mode, and the sliding shell is connected with the fluidized bed boiler in a sliding mode; the first auger is rotationally connected to the interior of the sliding shell in a limiting manner; the power assembly is arranged on the fixing frame; the first driving motor is fixedly connected to the fixing frame; and the reciprocating lead screw is fixedly connected to an output shaft of the first driving motor, and the reciprocating lead screw is in threaded connection with the sliding shell. The reciprocating lead screw drives the discharging port of the sliding shell to do linear reciprocating motion in the fluidized bed boiler, so that bottom materials are evenly laid in a hearth of the fluidized bed boiler, it is guaranteed that the internal temperature is even when the fluidized bed boiler operates, and the operation stability degree of the fluidized bed boiler is improved.

Description

Technical Field

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

[0002] A circulating fluidized bed boiler is a highly efficient combustion device. A circulating fluidized bed boiler achieves efficient combustion by mixing fuel and base material and fluidizing them under the action of airflow. It has the advantages of high combustion efficiency, low pollutant emissions, strong flexibility, and easy ash handling. It is widely used in the power, chemical, papermaking and other industries. Before using a circulating fluidized bed boiler, it is first necessary to inject base material into the furnace of the circulating fluidized bed boiler to establish a stable initial combustion environment and ensure that the boiler can start and operate smoothly. However, most of the existing base material filling equipment splices the screw conveyor with one side of the circulating fluidized bed boiler. When the base material is conveyed, the base material conveyed by the screw conveyor will accumulate on one side of the furnace of the circulating fluidized bed boiler, resulting in the base material height on the side of the furnace close to the screw conveyor being greater than the base material height on the side away from the screw conveyor, that is, the base material is unevenly distributed in the furnace, which in turn causes the internal combustion temperature of the circulating fluidized bed boiler to fluctuate during initial operation, affecting the stable operation of the circulating fluidized bed boiler. Summary of the invention

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

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

[0005] Base;

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

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

[0008] A first auger, limitedly rotatably connected to the interior of the sliding shell;

[0009] A power assembly is disposed on the fixed frame and is used to drive the first auger to rotate and transport materials;

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

[0011] A reciprocating screw, fixedly connected to the output shaft of the first drive motor, the reciprocating screw being threadedly connected to the sliding shell;

[0012] The bulk material assembly is arranged in the fluidized bed boiler and is used for evenly distributing the material transported into the fluidized bed boiler by the sliding shell.

[0013] More preferably, the bulk material assembly comprises:

[0014] A bulk material shell, fixedly connected to and communicated with the sliding shell, the bulk material shell is located in the fluidized bed boiler, and the bulk material shell is provided with a plurality of discharge holes;

[0015] A second auger, rotatably connected to the interior of the bulk material shell;

[0016] A spline shaft, spline-connected to the second auger and passing through the second auger to the outside of the bulk material shell;

[0017] A driving assembly 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 to transport the material in the sliding shell in two directions.

[0019] More preferably, the driving assembly comprises:

[0020] A transmission gear, fixedly connected to the spline shaft;

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

[0022] A switching component is arranged on the spline shaft and is used to make the spline shaft slide along the second auger.

[0023] More preferably, the two rack racks are respectively located on both sides of the transmission gear, and the two rack racks are staggered so that the transmission gear can only mesh with one rack rack at a time.

[0024] More preferably, the switching component includes:

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

[0026] A pushing block is fixedly connected to the spline shaft, and the two extrusion blocks are used to extrude the pushing block;

[0027] A 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 comprises:

[0029] A clamping shaft, slidably connected to the bulk material shell;

[0030] A first elastic element, disposed between the clamping shaft and the bulk material shell;

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

[0032] More preferably, it also includes:

[0033] An adjusting component 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 component includes:

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

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

[0036] A connecting rod, fixedly connected to the blocking frame;

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

[0038] More preferably, the driving assembly comprises:

[0039] a second driving motor, fixedly connected to the fluidized bed boiler;

[0040] The 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 consisting of an extrusion ring and a main shaft, the extrusion ring is provided with symmetrically distributed spiral 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 screw, so that the bottom material is evenly laid in the furnace of the fluidized bed boiler, ensuring that the internal temperature of the fluidized bed boiler is uniform during operation, thereby improving the operating stability of the fluidized bed boiler.

[0043] 2. By switching the position of the transmission gear, the transmission gear is meshed with the upper and lower racks respectively, so that the rotation direction of the second auger always remains the same, so as to ensure that the conveying direction of the bottom material inside remains consistent and the uniformity of the bottom material filling is ensured.

[0044] 3. The stability of the spline shaft is improved by the cooperation between the clamping shaft and the two clamping grooves to prevent the spline shaft from sliding along the second auger during the movement of the bulk material shell, causing the transmission gear to separate from the meshing rack, making it impossible for the second auger to rotate and transport the bottom material, affecting the uniformity of the bottom material filling.

[0045] 4. By increasing the aperture of the discharge hole on the bulk material shell in the middle area of ​​the fluidized bed boiler, the filling content of the bottom material of the bulk material 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, thereby ensuring the stable operation of the fluidized bed boiler. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0047] Figure 2 It is a schematic cross-sectional view of the three-dimensional structure of the sliding shell of the present invention;

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

[0049] Figure 4 It is a schematic cross-sectional view of the three-dimensional structure of the bulk material shell of the present invention;

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

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

[0052] Figure 7 It is a schematic diagram of the three-dimensional structure of the occlusion frame of the present invention;

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

[0054] Fig. 9 It is a schematic diagram of the three-dimensional structure of the extrusion ring and the main shaft of the present invention;

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

[0056] The meanings of the reference numerals in the figure are as follows: 1: base, 2: fluidized bed boiler, 3: fixed frame, 4: sliding shell, 5: first auger, 6: power assembly, 7: first drive motor, 8: reciprocating screw, 201: bulk shell, 202: second auger, 203: spline shaft, 204: transmission gear, 205: rack rack, 206: extrusion block, 207: pushing block, 301: clamping shaft, 302: first elastic element, 303: clamping groove, 401: sealing frame, 402: second elastic element, 403: connecting rod, 404: second drive motor, 405: extrusion rod, 4501: extrusion ring, 4502: main shaft. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that the directional terms such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and are not specific limitations of 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 pile up the bottom material on one side of the furnace of the circulating fluidized bed boiler, causing the bottom material height on the side close to the screw conveyor to be higher than that on the side far from the screw conveyor. This uneven distribution of bottom material will lead to height differences of the bottom material in the furnace, and then during the initial operation of the boiler, the internal combustion temperature will fluctuate, affecting the stable operation of the circulating fluidized bed boiler.

[0059] A circulating fluidized bed boiler bottom material filling device, such as Figure 1-Figure 3 As shown, it includes: a base 1; a fluidized bed boiler 2, which is arranged on the base 1, and the base 1 is fixedly connected to a fixing frame 3; a sliding shell 4, which 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 penetrates the fluidized bed boiler 2; a first auger 5, which is limitedly rotatably connected to the inside of the sliding shell 4; a power component 6, which is arranged on the fixing frame 3 and is used to drive the first auger 5 to rotate and transport materials; a first drive motor 7, which is fixedly connected to the fixing frame 3, a reciprocating screw 8, which is fixedly connected to the output shaft of the first drive motor 7, and the reciprocating screw 8 is threadedly connected to the sliding shell 4; a bulk material component, which is arranged in the fluidized bed boiler 2 and is used to evenly distribute the materials transported to the fluidized bed boiler 2 by the sliding shell 4.

[0060] In the above scheme, the fluidized bed boiler 2 is composed of multiple key components, including a furnace, an air distribution plate, a cyclone separator and a return system, etc. The above are all existing technologies and will not be described in detail here. The fixed frame 3 is high-strength structural steel with sufficient supporting strength and structural stability. The upper side of the sliding shell 4 away from one end of the fluidized bed boiler 2 is connected to the external bottom material storage device through a bellows, and the bellows has a certain length to facilitate the position change of the sliding shell 4. The power assembly 6 is composed of a servo motor, a first gear and a second gear, and the mutual connection relationship is: the servo motor is fixedly connected to the fixed frame 3, the output shaft of the servo motor is fixedly connected to the first gear, and the fixed frame 3 is limitedly rotated and connected to the first gear. A second gear is meshed with a gear, and 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 parts located outside the sliding shell 4 are all spline parts, which avoids the second gear from being separated from the spline parts outside the first auger 5. The length of the reciprocating 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 screw 8, which ensures that the external bellows does not contact the inner wall of the fluidized bed boiler 2. The reciprocating screw 8 drives the discharge port of the sliding shell 4 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 that the internal temperature of the fluidized bed boiler 2 is uniform during operation, thereby improving the operating stability of the fluidized bed boiler 2.

[0061] Specifically, Figure 3-Figure 5 As shown, the bulk material assembly includes: a bulk material shell 201, which is fixedly connected and communicated with the sliding shell 4, the bulk material shell 201 is located in the fluidized bed boiler 2, and the bulk material shell 201 is provided with a plurality of discharge holes; a second auger 202, which is rotatably connected to the inside of the bulk material shell 201; a spline shaft 203, which is spline-connected to the inside of the second auger 202 and passes through the second auger 202 to the outside of the bulk material shell 201; a driving assembly, which is arranged on the spline shaft 203 and is used to drive the second auger 202 to rotate; 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.

[0062] In the above scheme, the connection point between the bulk material shell 201 and the sliding shell 4 is located in the middle thereof, the discharge holes at the bottom of the bulk material shell 201 are evenly spaced, and the number can be changed according to actual conditions to improve the uniformity of 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 with each other, 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, Figure 3 and Figure 4As shown, the driving assembly includes: a transmission gear 204, which is fixedly connected to the spline shaft 203; two rack racks 205, which are fixedly connected to the inside of the fluidized bed boiler 2, and the two rack racks 205 both make the transmission gear 204 rotate in one direction; a switching assembly, which is arranged on the spline shaft 203 and is used to make the spline shaft 203 slide along the second auger 202; 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 the same time.

[0064] In the above scheme, the transmission gear 204 and the two racks 205 are electroplated with wear-resistant coatings, such as hard chrome coatings and nickel-based alloy coatings, on the outside to improve the surface hardness and wear resistance. The two racks 205 are respectively located on the upper and lower sides of the transmission gear 204, and the rack 205 located at the bottom is close to the front side of the fluidized bed boiler 2, and the rack 205 located at the top is close to the rear side of the fluidized bed boiler 2 (with the rack 205 located at the bottom being close to the rear side of the fluidized bed boiler 2). Figure 3 The direction is for example) and the offset distance between the two rack racks 205 is greater than the thickness of the transmission gear 204 to avoid the transmission gear 204 being stuck when docking with the two rack racks 205 at the same time.

[0065] Specifically, Figure 3-Figure 6 As shown, the switching component includes: two extrusion blocks 206, which are fixedly connected to the fluidized bed boiler 2; a push block 207, which is fixedly connected to the spline shaft 203, and the two extrusion blocks 206 are used to extrude the push block 207; a stabilizing component, which is arranged on the bulk shell 201 and is used to stabilize the state of the spline shaft 203.

[0066] In the above scheme, both extrusion blocks 206 have arc-shaped surfaces, and the two extrusion blocks 206 are symmetrically distributed around the center. The pushing block 207 is formed by splicing two identical cones, and the fitting surfaces of the two cones are the large-diameter surfaces. The arc-shaped surface of the extrusion block 206 fits with the side surface of the cone of the pushing block 207, so that the extrusion block 206 drives the spline shaft 203 to slide back and forth along the second auger 202 through the pushing block 207. The exteriors of the two extrusion blocks 206 and the pushing block 207 are electroplated with wear-resistant coatings, such as hard chromium coatings and nickel-based alloy coatings, to improve surface hardness and wear resistance.

[0067] Specifically, Figure 5 As 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 ; and 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 scheme, 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 in contact with the inclined surface 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 bottom material into the fluidized bed boiler 2, the external bottom material storage device is opened, the bottom material is injected into the sliding shell 4, and the servo motor is turned on at the same time, 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, and the first auger 5 drives the bottom material in the sliding shell 4 to gradually enter the middle part of the bulk material shell 201, and at the same time the first drive motor 7 is turned on, so that the output shaft of the first drive motor 7 drives the reciprocating screw 8 to rotate, and the reciprocating screw 8 drives the sliding shell 4 to slide inward along the fluidized bed boiler 2, so that the sliding shell 4 drives the bulk material shell 201 to move synchronously, and the bulk material shell 201 drives the second auger 202 inside to move synchronously, and the second auger 202 drives the internal spline shaft 203 to move synchronously, and the spline shaft 203 drives the transmission gear 204 to move along the adjacent rack 205, so that the transmission gear 204 moves The transmission gear 204 drives the second auger 202 to rotate through the spline shaft 203, and the second auger 202 transports the bottom material entering the middle of the bulk material 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 a number of discharge holes on the bulk material shell 201, and this is done until the bulk material shell 201 moves to the other side of the fluidized bed boiler 2. At this time, the reciprocating screw 8 drives the sliding shell 4 to move to the limit position, and the reciprocating screw 8 starts to drive the sliding shell 4 to reset. This cycle is repeated until the bottom material filling is completed, so that the reciprocating screw 8 drives the bulk material shell 201 to perform a linear reciprocating motion in the fluidized bed boiler 2 through the sliding shell 4, and the bulk material shell 201 continues to fill 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, thereby improving the operating stability of the fluidized bed boiler 2.

[0070] During the process of the reciprocating screw 8 driving the bulk material shell 201 to perform linear reciprocating motion in the fluidized bed boiler 2 through the sliding shell 4, the bulk material shell 201 will switch directions on both sides of the fluidized bed boiler 2. During this process, the bulk material shell 201 drives the push block 207 to move synchronously through the internal spline shaft 203, so that the push block 207 contacts and is squeezed by the extrusion blocks 206 on both sides of the fluidized bed boiler 2, so as to Figure 3 and Figure 4The direction is taken as an example. In the process of the bulk shell 201 driving the push block 207 to move to the right through the internal spline shaft 203, the transmission gear 204 drives the second auger 202 to rotate clockwise. When the push block 207 contacts the extrusion block 206 on the right, the transmission gear 204 is separated from the rack rack 205 below, but the two are still in the same plane. At this time, the front frustum of the push block 207 is squeezed by the right extrusion block 206, so that the push block 207 drives the spline shaft 203 to slide backward along the second auger 202, and the spline shaft 203 drives the transmission gear 204 to slide synchronously, so that the transmission gear 204 is misaligned with the rack rack 205 below, so that the transmission gear 204 is switched from the plane where the rack rack 205 below is located to the plane where the rack rack 205 above is located. At this time, the sliding shell 4 moves to the limit position of the right end of the reciprocating screw 8 and starts to switch direction, that is, the bulk material shell 201 switches direction synchronously. At this time, the bulk material shell 201 drives the internal spline shaft 203 to move left, and the transmission gear 204 meshes with the upper rack frame 205, and the transmission gear 204 moves left along the upper rack frame 205. At this time, the transmission gear 204 drives the second auger 202 to continue to rotate clockwise until the push block 207 contacts the left extrusion block 206, and this cycle is repeated 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 rack frames 205 respectively, so that the rotation direction of the second auger 202 always remains the same, so as to ensure that the conveying direction of the bottom material inside it is consistent and the uniformity of the bottom material filling is ensured.

[0071] When the spline shaft 203 slides along the second auger 202, the spline shaft 203 will drive the two slots 303 thereon to move synchronously, and the slots 303 will squeeze the shaft 301 to move upward, causing the shaft 301 to slide upward along the bulk material shell 201, and at the same time the first elastic element 302 is stretched, and this continues until the other shaft 301 slides into the other slot 303. At this time, the first elastic element 302 pulls the shaft 301 to reset and insert it into the adjacent slot 303, so that the shaft 301 and the slot 303 cooperate to improve the stability of the spline shaft 203, and avoid the spline shaft 203 sliding along the second auger 202 during the movement of the bulk material shell 201, causing the transmission gear 204 to separate from the meshing rack 205, making the second auger 202 unable to rotate and transport the bottom material, affecting the uniformity of the bottom material filling.

[0072] When the bottom material is loaded, the reciprocating screw 8 drives the bulk material shell 201 to reset to the initial state through the sliding shell 4, then turns off the servo motor, the first drive motor 7 and the external bottom material storage device, and then starts the fluidized bed boiler 2 to start combustion.

[0073] In a further embodiment, Figure 7 and Figure 8As shown, it also includes: an adjusting component, which 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, and the adjusting component includes: a blocking frame 401, which 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, which is arranged between the blocking frame 401 and the bulk material shell 201; a connecting rod 403, which is fixedly connected to the blocking frame 401; a driving component, which is arranged on the fluidized bed boiler 2, and is used to adjust the sliding distance of the blocking frame 401 along the bulk material shell 201.

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

[0075] Specifically, Figure 2 and Figure 8-Figure 10 As shown, the driving assembly 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 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.

[0076] In the above scheme, the second drive motor 404 is fixedly connected to the outside of the fluidized bed boiler 2, and a certain distance is left between the two to prevent the high temperature in the fluidized bed boiler 2 from being transmitted to the second drive motor 404 and causing damage. At the same time, the second drive motor 404 is a high-temperature resistant motor. The outside of the extrusion rod 405 and the connecting rod 403 are electroplated with a wear-resistant coating, such as a hard chrome coating and a nickel-based alloy coating, to improve the surface hardness and wear resistance. The extrusion ring 4501 is an isosceles trapezoid after being "unfolded". The extrusion ring 4501 The thickness of the extrusion ring 4501 gradually decreases from its upper bottom to the lower bottom, and the two waists of the extrusion ring 4501 cooperate with the main shaft 4502 to form a gently 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 bottom of the extrusion ring 4501 is close to the connecting rod 403, that is, the maximum thickness of the extrusion ring 4501 is close to the connecting rod 403, and the width of the upper bottom of the extrusion ring 4501 is smaller than the width of the bottom of the furnace, and the width of the lower bottom of the extrusion ring 4501 is smaller than the maximum width of the furnace.

[0077] The furnace bottom of the existing circulating fluidized bed boiler is mostly flared, that is, the cross section is an isosceles trapezoid placed inversely, which is used to evenly distribute the airflow, facilitate slag removal and increase the combustion rate. When the bulk material shell 201 is loaded into the circulating fluidized bed boiler, the bottom material that falls on the inclined surface of the furnace bottom (the waist of the isosceles trapezoid structure placed inversely at the bottom of the furnace, which will be described in detail later) will roll to the bottom, resulting in the sides of the bottom material loaded in the furnace being larger than the middle. Therefore, when the bulk material shell 201 reciprocates to load the bottom material into the furnace of the fluidized bed boiler 2, the bulk material shell 201 will bring The blocking frame 401 on it moves synchronously, and the blocking 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 shell 201 remains unchanged, until the bulk shell 201 is no longer located above the inclined surface of the fluidized bed boiler 2, and after traveling a specific distance, the bulk shell 201 drives the connecting rod 403 to slide from the main shaft 4502 to the extrusion ring 4501 through the blocking frame 401, and the extrusion ring 4501 squeezes the connecting rod 403 forward, so that the connecting rod 403 drives the blocking frame 401 slides along the bulk shell 201, and at the same time increases the aperture of the discharge hole on the bulk shell 201, thereby increasing the amount of bulk shell 201 put into the furnace per unit time, and at the same time the second elastic element 402 is further compressed, the rotation speed of the servo motor is accelerated, so that the content of bottom material entering the bulk shell 201 by the sliding shell 4 increases, thereby ensuring the content of bottom material put into the bulk shell 201, until the connecting rod 403 is separated from the extrusion ring 4501 and fits with the main shaft 4502, the second elastic element 402 is reset and pushes the blocking frame 401 to reset, and the bulk shell 20 is restored. 1, and 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 bottom material into the inclined surface on the other side, and this is repeated until the bulk material shell 201 travels a stroke (the bulk material shell 201 moves from one side of the fluidized bed boiler 2 to the other side), and this cycle is repeated. 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 bottom material filling content of the bulk material shell 201 is increased, ensuring that the bottom material liquid level in the furnace of the fluidized bed boiler 2 is in a relatively flat and uniform state, thereby ensuring the stable operation of the fluidized bed boiler 2.

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

[0079] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in 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 fixed 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 fixed frame (3) and is used to drive the first auger (5) to rotate and transport materials; A first driving motor (7) fixedly connected to the fixing frame (3); A reciprocating screw (8) is fixedly connected to the output shaft of the first drive motor (7), and the reciprocating screw (8) is 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 into the fluidized bed boiler (2) by the sliding shell (4).

2. The circulating fluidized bed boiler bottom material filling device according to claim 1 is characterized in that: The bulk material assembly comprises: A bulk material shell (201) is fixedly connected to and communicated with the sliding shell (4), the bulk material shell (201) is located in the fluidized bed boiler (2), and the bulk material shell (201) is provided with a plurality of discharge holes; A second auger (202) is 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 through 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 for driving 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 the two rack racks (205) both 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 staggeredly distributed so that the transmission gear (204) can only mesh with one rack rack (205) at the same 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); The 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 spline shaft (203) through the clamping grooves (303).

8. The bottom material filling device for a circulating fluidized bed boiler according to claim 7, characterized in that: Also included are: An adjusting 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), and the adjusting 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 is arranged on the fluidized bed boiler (2) and is used to adjust the sliding distance of the blocking frame (401) along the bulk material shell (201).

9. The bottom material filling device for a circulating fluidized bed boiler according to claim 8, characterized in that: The drive assembly comprises: A second driving motor (404) is fixedly connected to the fluidized bed boiler (2); The extrusion rod (405) is fixedly connected to the output shaft of the second drive 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).

10. The bottom material filling device for a circulating fluidized bed boiler according to claim 9, characterized in that: 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.

Images