A circulating fluidized bed air volume control system

Abstract

The present invention provides a circulating fluidized bed air volume control system, which relates to the field of coal-fired power generation and includes: a fluidized bed furnace. The upper right side of the fluidized bed furnace is connected to a separator through a pipeline, and the right side of the separator is connected to a tail flue through a pipeline. Two air preheaters are installed on the lower side inside the tail flue. Through the cooperation of a driving mechanism, two U-shaped driving plates and a frame-shaped air blowing pipe member, during the operation of the secondary fan, the two U-shaped driving plates and the frame-shaped air blowing pipe member can be driven to move up and down reciprocally, so that the blowing range of the frame-shaped air blowing pipe member is increased, thereby improving the blowing effect of the secondary air blowing pipe member, and thus increasing the combustion-supporting effect; it solves the problem that the secondary air blowing pipe member in the existing circulating fluidized bed air volume control system is always in a fixed state inside the fluidized bed furnace, resulting in a limited blowing range of the secondary air blowing pipe member, thereby reducing the blowing effect of the secondary air blowing pipe member.

Description

Technical Field

[0001] The present invention relates to the technical field of coal-fired power generation, and particularly to a fluidized bed air volume control system for a circulating fluidized bed. Background Art

[0002] In the process of coal-fired power generation, a circulating fluidized bed is applied. A circulating fluidized bed is a technology in which a large number of solid particles are suspended in a moving fluid, so that the particles have some apparent characteristics of the fluid. The circulating fluidized bed consists of equipment such as a fluidized bed furnace (combustion chamber) and a separator to form a main circulation loop. The ash generated by fuel combustion and desulfurization limestone accumulate in the system, forming a bubbling bed or a turbulent bed at the lower part of the combustion chamber and a fast bed at the upper part. During the operation of the circulating fluidized bed, an air volume control system is also required. The air volume control system includes the control of the total air volume and the ratio of the primary air to the secondary air. The total air volume is obtained according to the fuel command and corrected according to the oxygen amount signal to form a total air volume command signal.

[0003] However, in the existing secondary air blowing pipe components in the circulating fluidized bed air volume control system, since they are always in a fixed state inside the fluidized bed furnace, the blowing range of the secondary air blowing pipe components is limited, thus reducing the blowing effect of the secondary air blowing pipe components. Moreover, although lubricating oil is added inside the bearing seat of the primary fan in the existing circulating fluidized bed air volume control system to lubricate the internal structure of the bearing seat through the lubricating oil, after the primary fan operates for a long time, the lubricating oil inside the bearing seat is prone to high temperature, which will weaken the lubricating effect, thereby affecting the service life of the internal structure of the bearing seat. In addition, during the operation of the motor on the primary fan, due to the strong vibration force generated, the nuts on the motor base are prone to loosen, thus affecting the stability of the motor on the primary fan during operation. Summary of the Invention

[0004] The embodiments of the present disclosure relate to a fluidized bed air volume control system for a circulating fluidized bed. Through the cooperation of a driving mechanism, two U-shaped driving plates and a frame-shaped air blowing pipe component, it can drive the two U-shaped driving plates and the frame-shaped air blowing pipe component to reciprocate up and down, increasing the blowing range of the frame-shaped air blowing pipe component, thereby improving the blowing effect of the secondary air blowing pipe component and increasing the combustion-supporting effect; through the setting of a driving pulley and a circulating lubrication component, the internal structure of the bearing seat can be subjected to a circulating lubrication and cooling effect, avoiding the phenomenon that the lubricating oil inside the bearing seat is prone to high temperature after the primary fan operates for a long time, improving the lubricating effect and the service life of the internal structure of the bearing seat, and by adding cooling water into the cooling box, the temperature of the lubricating oil flowing through the inside of the oil storage housing can be effectively reduced, further improving the lubricating effect.

[0005] In a first aspect of the present disclosure, a circulating fluidized bed air volume control system is provided, which specifically comprises: a fluidized bed furnace, wherein the upper right side of the fluidized bed furnace is connected to a separator through a pipeline, and the right side of the separator is connected to a tail flue through a pipeline, two air preheaters are installed on the lower side of the tail flue, and the air inlets of the two air preheaters are respectively connected to a primary fan and a secondary fan through pipelines, a first feed port and a second feed port are respectively provided at the lower front side of the fluidized bed furnace, and the first feed port and the second feed port are both connected to a feeding device, and a coal bunker and a limestone bunker are respectively installed on the upper sides of the two feeding devices; a blowing mechanism is provided on the lower side of the fluidized bed furnace, and a driving mechanism is installed on the fluidized bed furnace; The primary fan comprises a support seat, a support platform, a fan housing, a transmission shaft, a motor, a bearing seat, an oil inlet pipe head and an oil outlet pipe head. The support seat is installed on the upper part of the support seat, and the support platform is located on the left side of the fan housing. The motor is installed on the left side of the upper end surface of the support platform, and the transmission shaft is fixedly connected to the rotating shaft of the motor, and the other end of the transmission shaft is fixedly connected to the impeller rotating shaft on the fan housing. A bearing seat is installed on the outside of the transmission shaft, and the bearing seat is fixedly installed on the right side of the upper end surface of the support platform. Five oil inlet pipe heads and two oil outlet pipe heads are respectively provided on the upper and lower sides of the bearing seat, and a circulating lubrication assembly is connected between the five oil inlet pipe heads and the two oil outlet pipe heads; four anti-loosening mechanisms are installed on the base of the motor.

[0006] In at least some embodiments, a first air inlet is provided at the lower end of the fluidized bed furnace, and a primary air duct is connected to the lower end of the first air inlet, and the other end of the primary air duct is connected to the air outlet of an upper air preheater; a sealed shell is fixedly installed at the lower part of the left end surface of the fluidized bed furnace, and a secondary air rigid pipe is fixedly connected to the left side wall of the sealed shell, the left end of the secondary air rigid pipe is connected to the secondary air duct, and the other end of the secondary air duct is connected to the air outlet of a lower air preheater; an electric air flow valve is installed on both the primary air duct and the secondary air duct.

[0007] In at least some embodiments, a return port is provided at the lower right side of the fluidized bed furnace, and the other end of the return port is connected to the discharge port at the lower end of the separator through a pipe; two T-shaped slide grooves are provided on the four sides around the inside of the fluidized bed furnace, and a rectangular opening is provided at the lower left end surface of the fluidized bed furnace, and the rectangular opening is located inside the sealed shell.

[0008] In at least some embodiments, the primary fan also includes a drive pulley, a stud, a nut and a locking gear. The drive pulley is fixedly mounted on the transmission shaft; four studs are fixedly connected to the left side of the upper end surface of the support base, and the four studs pass through the base of the motor, and each stud is threadedly connected to a nut on the outside, and a locking gear is fixedly connected to the bottom of each nut.

[0009] In at least some embodiments, the circulating lubrication assembly includes a cooling box, an oil storage housing, an oil pump body, a flow dividing pipe fitting, a rotating shaft, a driven pulley, a confluence pipe, an oil filling pipe head, and heat dissipation fins. The cooling box is fixedly installed on the upper end surface of the support base, and an oil storage housing is installed inside the cooling box. An oil outlet and an oil inlet are respectively provided on the front and rear sides of the oil storage housing, and the oil outlet and the oil inlet respectively penetrate through the front and rear side walls of the cooling box. The oil pump body is installed on the front side of the support platform, and the suction port of the oil pump body is connected to the front oil outlet of the oil storage housing through a pipeline. The oil outlet of the oil pump body is connected to a flow dividing pipe fitting through a pipeline, and the flow dividing pipe fitting is connected to five oil filling pipe heads. The rear oil inlet of the oil storage housing is connected to a confluence pipe, and the other two ends of the confluence pipe are respectively connected to two oil outlet heads. An oil filling pipe head is provided on the upper part of the oil storage housing, and a sealing cover is connected to the upper end of the oil filling pipe head through a thread. Heat dissipation fins are evenly arranged on the left and right end faces of the oil storage housing. A rotating shaft is fixedly connected to the input shaft of the oil pump body, a driven pulley is installed at the right end of the rotating shaft, and the driven pulley is in transmission connection with a driving pulley through a belt.

[0010] In at least some embodiments, the anti-loosening mechanism includes an anti-loosening housing, a sliding block, a pressing block, a locking tooth block, a rotating rod, and an L-shaped limiting block. The anti-loosening housing is fixedly installed on the base of the motor, and a sliding block is slidably connected inside the anti-loosening housing. A pressing block penetrating through the head of the anti-loosening housing is provided on the head end face of the sliding block, and two locking tooth blocks are provided on the head end face of the pressing block. A rotating rod is rotatably connected to the bottom of the sliding block. An L-shaped limiting block is fixedly connected to the outside of the anti-loosening housing.

[0011] In at least some embodiments, when the anti-loosening mechanism is in the anti-loosening state, the head end of the locking tooth block is in close contact with the outer peripheral surface of the locking gear.

[0012] In at least some embodiments, the blowing mechanism includes a frame-shaped blowing pipe fitting, a T-shaped slider, a sealing plate, a C-shaped driving plate, an air delivery hose, and a strip-shaped through opening. Eight T-shaped sliders are fixedly connected to the outside of the frame-shaped blowing pipe fitting, and the eight T-shaped sliders are respectively slidably connected to eight T-shaped chutes. A sealing plate is fixedly connected to the left side of the upper and lower end faces of the frame-shaped blowing pipe fitting, and the left side surfaces of the two sealing plates are in contact with the left side surface inside the fluidized bed furnace. A C-shaped driving plate is fixedly connected to the left and right sides of the upper end face of the frame-shaped blowing pipe fitting, and a strip-shaped through opening is formed in the upper part of the opposite surfaces of the two C-shaped driving plates. The left air inlet of the frame-shaped blowing pipe fitting is connected to an air delivery hose, and the left end of the air delivery hose is fixedly connected to a secondary air hard pipe.

[0013] In at least some embodiments, the drive mechanism includes a drive shaft, a driven shaft, a circular drive disk, a driven column, and a drive motor. The drive shaft is rotatably connected to the rear side of the fluidized bed furnace, and a first sprocket is installed at both the left and right ends of the drive shaft. A worm gear is fixedly installed in the middle of the outer side of the drive shaft. There are two driven shafts, and the two driven shafts are respectively rotatably connected to the left and right sides of the fluidized bed furnace, and the two driven shafts respectively penetrate the left and right side walls of the fluidized bed furnace. A second sprocket is installed at the opposite ends of the two driven shafts, and the second sprocket is connected to the first sprocket through a chain drive. A circular drive disk is installed at the opposite ends of the two driven shafts, and a driven column is fixedly connected to the edge of the opposite surfaces of the two circular drive disks, and the two driven columns are respectively located inside the two strip-shaped through openings. The drive motor is installed on the rear end face of the fluidized bed furnace, and a worm meshing with the worm gear is fixedly installed on the rotating shaft of the drive motor.

[0014] In at least some embodiments, when the two circular drive disks drive the two driven columns to rotate, the two driven columns drive the two U-shaped driving plates and the frame-shaped air blowing pipe member to move up and down reciprocally.

[0015] The present invention provides a circulating fluidized bed air volume control system, which has the following beneficial effects:

[0016] Through the cooperation of the drive mechanism, the two U-shaped driving plates and the frame-shaped air blowing pipe member, during the operation of the secondary fan, the drive motor can be started, and finally drive the two U-shaped driving plates and the frame-shaped air blowing pipe member to move up and down reciprocally, increasing the blowing range of the frame-shaped air blowing pipe member, thereby improving the blowing effect of the secondary air blowing pipe member, and thus increasing the combustion-supporting effect.

[0017] Through the setting of the drive pulley and the circulating lubrication component, during the operation of the primary fan, the lubricating oil inside the oil storage housing can be transported to the inside of the shunt pipe fitting, and then the lubricating oil is shunted into the five oil inlet pipe heads through the shunt pipe fitting, and finally flows downward from the upper side inside the bearing housing, so that the internal structure of the bearing housing can be circulated lubricated and cooled, avoiding the phenomenon that the lubricating oil inside the bearing housing is prone to high temperature after the primary fan operates for a long time, improving the lubrication effect, increasing the service life of the internal structure of the bearing housing, and by adding cooling water to the inside of the cooling box, the temperature of the lubricating oil flowing through the inside of the oil storage housing can be effectively reduced, further improving the lubrication effect.

[0018] Through the cooperation of the locking gear and the anti-loosening mechanism, during the operation of the primary fan, even if the motor on the primary fan generates a strong vibration force, through the cooperation of the anti-loosening mechanism and the locking gear, the nut can be effectively prevented from loosening, thereby improving the stability of the motor on the primary fan during operation.

[0019] By setting the electric air flow valve, when the primary fan and the secondary fan are in operation, the air output of the primary air duct and the secondary air duct can be regulated by two electric air flow valves, thereby effectively adjusting the operating oxygen content and further adjusting the fuel combustion efficiency inside the fluidized bed furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0021] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0022] In the attached picture:

[0023] Figure 1 A system diagram of the present application is shown;

[0024] Figure 2 The schematic diagram of the structure of the fluidized bed furnace and the blower mechanism of the present application is shown;

[0025] Figure 3 A schematic structural diagram of a partial cross-section of a fluidized bed furnace of the present application is shown;

[0026] Figure 4 A schematic diagram of a partial cross-section of a fluidized bed furnace and a sealed shell of the present application is shown;

[0027] Figure 5 A schematic structural diagram of the hair dryer mechanism and the driving mechanism of the present application is shown;

[0028] Figure 6 A three-dimensional structural schematic diagram of a primary fan and a circulating lubrication assembly of the present application is shown;

[0029] Figure 7 A schematic diagram of the structure of the primary fan and the circulating lubrication assembly of the present application is shown in the front view;

[0030] Figure 8 A schematic diagram of the structure of the bearing seat and the circulating lubrication assembly of the present application is shown;

[0031] Fig. 9 A schematic structural diagram of a circulating lubrication assembly of the present application is shown;

[0032] Fig.10 A schematic diagram of the structure of the circulating lubrication assembly of the present application after the cooling box is removed is shown;

[0033] Fig.11 This application shows Figure 6 A schematic diagram of the structure with a partial enlargement at the center;

[0034] Fig.12A schematic structural diagram of the locking gear and the anti-loosening mechanism of the present application is shown.

[0035] Reference numerals:

[0036] 1. Fluidized bed furnace; 101. First feed port; 102. Second feed port; 103. First air inlet; 104. Sealed shell; 105. Return port; 106. Primary air duct; 107. Secondary air duct; 108. Secondary air hard pipe; 109. Electric air flow valve; 1010. T-shaped slide; 1011. Rectangular opening;

[0037] 2. Separator;

[0038] 3. Tail flue; 301. Air preheater;

[0039] 4. Primary fan; 401. Support seat; 402. Support platform; 403. Fan housing; 404. Transmission shaft; 405. Motor; 406. Bearing seat; 407. Driving pulley; 408. Stud; 409. Nut; 4010. Locking gear; 4011. Oil inlet pipe head; 4012. Oil outlet pipe head;

[0040] 5. Secondary fan;

[0041] 6. Feeding device;

[0042] 7. Coal bunker;

[0043] 8. Limestone silo;

[0044] 9. Circulating lubrication assembly; 901. Cooling box; 902. Oil storage housing; 903. Oil pump body; 904. Diverter pipe; 905. Rotating shaft; 906. Passive pulley; 907. Manifold; 908. Oil filling pipe head; 909. Heat dissipation fins;

[0045] 10. Anti-loosening mechanism; 1001. Anti-loosening housing; 1002. Sliding block; 1003. Tightening block; 1004. Locking tooth block; 1005. Rotating rod; 1006. L-shaped limit block;

[0046] 11. Blowing machine; 1101. Frame-shaped blowing pipe; 1102. T-shaped sliding block; 1103. Sealing plate; 1104. U-shaped driving plate; 1105. Air supply hose; 1106. Strip-shaped opening;

[0047] 12. Driving mechanism; 1201. Driving shaft; 1202. Driving shaft; 1203. Circular driving disk; 1204. Driving column; 1205. Driving motor. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] Example 1: Please refer to Figures 1 to 12 :

[0050] The present invention proposes a circulating fluidized bed air volume control system, comprising: a fluidized bed furnace 1, a separator 2 is connected to the upper right side of the fluidized bed furnace 1 through a pipeline, and the right side of the separator 2 is connected to a tail flue 3 through a pipeline, two air preheaters 301 are installed on the lower side of the tail flue 3, and the air inlets of the two air preheaters 301 are respectively connected to a primary fan 4 and a secondary fan 5 through pipelines, a first feed port 101 and a second feed port 102 are respectively provided at the lower front side of the fluidized bed furnace 1, and the first feed port 101 and the second feed port 102 are both connected to a feeding device 6, and a coal bunker 7 and a limestone bunker 8 are respectively installed on the upper sides of the two feeding devices 6; a blower mechanism 11 is provided on the lower side of the fluidized bed furnace 1, and a driving mechanism 12 is installed on the fluidized bed furnace 1; the primary fan 4 comprises a support seat 401, a support platform 402, a fan housing 403, a transmission shaft 404, and a motor 405. 05, bearing seat 406, oil inlet pipe head 4011 and oil outlet pipe head 4012, a support platform 402 and a fan casing 403 are installed on the upper part of the support seat 401, and the support platform 402 is located on the left side of the fan casing 403, a motor 405 is installed on the left side of the upper end surface of the support platform 402, and a transmission shaft 404 is fixedly connected to the rotating shaft of the motor 405, and the other end of the transmission shaft 404 is fixedly connected to the impeller rotating shaft on the fan casing 403, a bearing seat 406 is installed outside the transmission shaft 404, and the bearing seat 406 is fixedly installed on the right side of the upper end surface of the support platform 402, five oil inlet pipe heads 4011 and two oil outlet pipe heads 4012 are respectively provided on the upper and lower sides of the bearing seat 406, and a circulating lubrication component 9 is connected between the five oil inlet pipe heads 4011 and the two oil outlet pipe heads 4012; four anti-loosening mechanisms 10 are installed on the base of the motor 405 to prevent the nut 409 from loosening.

[0051] A first air inlet 103 is provided at the lower end of the fluidized bed furnace 1, and a primary air duct 106 is connected to the lower end of the first air inlet 103, and the other end of the primary air duct 106 is connected to the air outlet of an upper air preheater 301; a sealed shell 104 is fixedly installed at the lower part of the left end surface of the fluidized bed furnace 1, and a secondary air hard pipe 108 is fixedly connected to the left side wall of the sealed shell 104, a secondary air duct 107 is connected to the left end of the secondary air hard pipe 108, and the other end of the secondary air duct 107 is connected to the air outlet of a lower air preheater 301; an electric air flow valve 109 is installed on each of the primary air duct 106 and the secondary air duct 107 for regulating the air output of the primary air duct 106 and the secondary air duct 107.

[0052] A return port 105 is provided at the lower right side of the fluidized bed furnace 1, and the other end of the return port 105 is connected to the discharge port at the lower end of the separator 2 through a pipeline; two T-shaped slide grooves 1010 are provided on the four sides around the inside of the fluidized bed furnace 1, and a rectangular opening 1011 is provided at the lower left end surface of the fluidized bed furnace 1, and the rectangular opening 1011 is located inside the sealed shell 104.

[0053] The primary fan 4 also includes a driving pulley 407, a stud 408, a nut 409 and a locking gear 4010. The driving pulley 407 is fixedly mounted on the transmission shaft 404. Four studs 408 are fixedly connected to the left side of the upper end surface of the support seat 401, and the four studs 408 pass through the base of the motor 405. A nut 409 is threadedly connected to the outside of each stud 408, and a locking gear 4010 is fixedly connected to the bottom of each nut 409 for cooperating with the anti-loosening mechanism 10 to lock and limit the nut 409.

[0054] The circulating lubrication assembly 9 includes a cooling box 901, an oil storage housing 902, an oil transfer pump body 903, a flow splitting pipe fitting 904, a rotating shaft 905, a driven pulley 906, a confluence pipe 907, a fuel filling pipe head 908, and heat dissipation fins 909. The cooling box 901 is fixedly installed on the upper end surface of the support base 401, and the oil storage housing 902 is installed inside the cooling box 901. An oil outlet and an oil inlet are respectively provided on the front and rear sides of the oil storage housing 902, and the oil outlet and the oil inlet respectively penetrate through the front and rear side walls of the cooling box 901. The oil transfer pump body 903 is installed on the front side of the support platform 402, and the oil suction port of the oil transfer pump body 903 is connected to the front oil outlet of the oil storage housing 902 through a pipeline. The oil outlet of the oil transfer pump body 903 is connected to a flow splitting pipe fitting 904 through a pipeline, and the flow splitting pipe fitting 904 is connected to five fuel filling pipe heads 4011. The rear oil inlet of the oil storage housing 902 is connected to a confluence pipe 907, and the other two ends of the confluence pipe 907 are respectively connected to two oil outlet heads 4012. A fuel filling pipe head 908 is provided on the upper part of the oil storage housing 902, and a sealing cover is threadedly connected to the upper end of the fuel filling pipe head 908. Heat dissipation fins 909 are evenly provided on the left and right end surfaces of the oil storage housing 902. A rotating shaft 905 is fixedly connected to the input shaft of the oil transfer pump body 903, and a driven pulley 906 is installed at the right end of the rotating shaft 905, and the driven pulley 906 is in transmission connection with the driving pulley 407 through a belt. Through the setting of the circulating lubrication assembly 9, the internal structure of the bearing seat 406 can be subjected to circulating lubrication and cooling, avoiding the phenomenon that the lubricating oil inside the bearing seat 406 is prone to high temperature after the primary air fan 4 operates for a long time, and improving the lubrication effect.

[0055] The air blowing mechanism 11 includes a frame-shaped air blowing pipe fitting 1101, a T-shaped slider 1102, a sealing plate 1103, a C-shaped driving plate 1104, an air conveying hose 1105, and a strip-shaped through opening 1106. Eight T-shaped sliders 1102 are fixedly connected to the outside of the frame-shaped air blowing pipe fitting 1101, and the eight T-shaped sliders 1102 are respectively slidably connected to eight T-shaped chutes 1010. Sealing plates 1103 are fixedly connected to the left sides of the upper and lower end surfaces of the frame-shaped air blowing pipe fitting 1101, and the left side surfaces of the two sealing plates 1103 are in contact with the left side surface inside the fluidized bed furnace chamber 1. C-shaped driving plates 1104 are fixedly connected to the left and right sides of the upper end surface of the frame-shaped air blowing pipe fitting 1101, and strip-shaped through openings 1106 are respectively formed in the upper parts of the opposite surfaces of the two C-shaped driving plates 1104. The left air inlet of the frame-shaped air blowing pipe fitting 1101 is connected to an air conveying hose 1105, and the left end of the air conveying hose 1105 is fixedly connected to the secondary air hard pipe 108. Through the setting of the air blowing mechanism 11, it is used to blow the secondary air.

[0056] The drive mechanism 12 includes a drive shaft 1201, a driven shaft 1202, a circular drive disk 1203, a driving column 1204, and a drive motor 1205. The drive shaft 1201 is rotatably connected to the rear side of the fluidized bed furnace chamber 1, and a first sprocket is installed at both the left and right ends of the drive shaft 1201. A worm gear is fixedly installed in the middle on the outside of the drive shaft 1201. The number of driven shafts 1202 is two, and the two driven shafts 1202 are respectively rotatably connected to the left and right sides of the fluidized bed furnace chamber 1, and the two driven shafts 1202 respectively penetrate the left and right side walls of the fluidized bed furnace chamber 1; a second sprocket is installed at the opposite ends of the two driven shafts 1202, and the second sprocket is connected to the first sprocket through a chain drive; a circular drive disk 1203 is installed at the opposite ends of the two driven shafts 1202, and a driving column 1204 is fixedly connected to the edge of the opposite surface of the two circular drive disks 1203, and the two driving columns 1204 are respectively located inside the two strip-shaped through openings 1106; the drive motor 1205 is installed on the rear end surface of the fluidized bed furnace chamber 1, and a worm engaged with the worm gear is fixedly installed on the rotating shaft of the drive motor 1205; when the two circular drive disks 1203 drive the two driving columns 1204 to rotate, the two driving columns 1204 drive the two U-shaped driving plates 1104 and the frame-shaped air blowing pipe member 1101 to move up and down reciprocally, and finally drive the two U-shaped driving plates 1104 and the frame-shaped air blowing pipe member 1101 to move up and down reciprocally, so that the air blowing range of the frame-shaped air blowing pipe member 1101 is increased.

[0057] Embodiment 2, on the basis of Embodiment 1, as Figure 6 , Fig.11 and Fig.12 shown, the anti-loosening mechanism 10 includes an anti-loosening housing 1001, a sliding block 1002, a pressing block 1003, a locking tooth block 1004, a rotating rod 1005, and an L-shaped limiting block 1006. The anti-loosening housing 1001 is fixedly installed on the base of the motor 405, and the sliding block 1002 is slidably connected inside the anti-loosening housing 1001. The head end surface of the sliding block 1002 is provided with a pressing block 1003 penetrating the head of the anti-loosening housing 1001, and two locking tooth blocks 1004 are provided on the head end surface of the pressing block 1003; the bottom of the sliding block 1002 is rotatably connected to the rotating rod 1005; the L-shaped limiting block 1006 is fixedly connected to the outside of the anti-loosening housing 1001; when the anti-loosening mechanism 10 is in the anti-loosening state, the head end of the locking tooth block 1004 is in close contact with the outer peripheral surface of the locking gear 4010, so that the nut 409 can be effectively prevented from loosening.

[0058] The working principle of this embodiment is as follows: during operation, the fuel in the coal bin 7 and the limestone in the limestone bin 8 are transported to the fluidized bed furnace 1 through two feeding devices 6 respectively, and then the primary fan 4 is started to transport the combustion-supporting primary air through the pipeline, an upper air preheater 301, the primary air pipeline 106, and the first air inlet 103 to the fluidized bed furnace 1, and then the secondary fan 5 is started to transport the secondary air through the pipeline, a lower air preheater 301, the secondary air pipeline 107, the secondary air hard pipe 108, the air delivery hose 1105, and the frame-shaped blowing pipe 1101 to the fluidized bed furnace 1. The fuel burns in a fluidized state in the fluidized bed furnace 1, and the combustion flue gas carries a part of the solid particles out of the fluidized bed furnace 1 and enters the separator 2. The separator 2 separates the solid particles and returns them to the fluidized bed furnace 1 for further combustion, and the flue gas is discharged into the tail flue 3. This cycle is repeated to form a circulating fluidized bed.

[0059] During the operation of the secondary fan 5, the driving motor 1205 is started, driving the worm, worm wheel, driving shaft 1201, the first sprocket, the second sprocket, the two driving shafts 1202 and the two circular driving disks 1203 to rotate, and then the two circular driving disks 1203 drive the two driving columns 1204 to rotate, thereby driving the two U-shaped driving plates 1104 and the frame-shaped blowing pipe 1101 to move back and forth up and down, so that the blowing range of the frame-shaped blowing pipe 1101 is increased.

[0060] During the operation of the primary fan 4, the motor 405 rotates with the transmission shaft 404 and the driving pulley 407 at the same time. Then the driving pulley 407 rotates with the passive pulley 906, the rotating shaft 905 and the input shaft of the oil pump body 903, so that the oil suction port of the oil pump body 903 generates suction, and the lubricating oil inside the oil storage shell 902 is transported to the inside of the diverter pipe 904, and then the lubricating oil is diverted to the inside of the five oil inlet pipe heads 4011 through the diverter pipe 904, and finally flows downward from the upper side of the bearing seat 406, so that the internal structure of the bearing seat 406 is subjected to circulating lubrication and cooling.

[0061] In addition, even if the motor 405 on the primary fan 4 generates strong vibration force during operation, the nut 409 can be effectively prevented from loosening through the cooperation between the anti-loosening mechanism 10 and the locking gear 4010.

[0062] In this article, there are a few points to note:

[0063] 1. The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure, and other structures may refer to the general design;

[0064] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0065] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A circulating fluidized bed air volume control system, comprising: A fluidized bed furnace (1), wherein the upper right side of the fluidized bed furnace (1) is connected to a separator (2) via a pipeline, and the right side of the separator (2) is connected to a tail flue (3) via a pipeline, two air preheaters (301) are installed on the lower inner side of the tail flue (3), and the air inlets of the two air preheaters (301) are respectively connected to a primary fan (4) and a secondary fan (5) via pipelines, and a first feed inlet (101) and a second feed inlet (102) are respectively provided at the lower front side of the fluidized bed furnace (1), The first feed port (101) and the second feed port (102) are both connected to a feeding device (6), and a coal bunker (7) and a limestone bunker (8) are respectively installed on the upper parts of the two feeding devices (6); the fluidized bed furnace (1) is provided with a blower mechanism (11) on the lower side thereof, and the fluidized bed furnace (1) is provided with a driving mechanism (12); the primary fan (4) comprises a support seat (401), a support platform (402), a fan housing (403), a transmission shaft (404), a motor (405), and a fan housing (406). 05), a bearing seat (406), an oil inlet pipe head (4011) and an oil outlet pipe head (4012), a support platform (402) and a fan housing (403) are installed on the upper part of the support seat (401), and the support platform (402) is located on the left side of the fan housing (403), a motor (405) is installed on the left side of the upper end surface of the support platform (402), and a transmission shaft (404) is fixedly connected to the rotating shaft of the motor (405), and the other end of the transmission shaft (404) is connected to the impeller on the fan housing (403). The rotating shaft is fixedly connected, a bearing seat (406) is installed outside the transmission shaft (404), and the bearing seat (406) is fixedly installed on the right side of the upper end surface of the support platform (402), and five oil inlet pipe heads (4011) and two oil outlet pipe heads (4012) are respectively provided on the upper and lower sides of the bearing seat (406), and a circulating lubrication component (9) is connected between the five oil inlet pipe heads (4011) and the two oil outlet pipe heads (4012); four anti-loosening mechanisms (10) are installed on the base of the motor (405); A sealing shell (104) is fixedly installed at the lower part of the left end surface of the fluidized bed furnace (1), and a secondary air hard pipe (108) is fixedly connected to the left side wall of the sealing shell (104); Two T-shaped slide grooves (1010) are provided on four sides of the fluidized bed furnace (1), and a rectangular opening (1011) is provided at the lower part of the left end surface of the fluidized bed furnace (1), and the rectangular opening (1011) is located inside the sealed shell (104); The blowing mechanism (11) includes a frame-shaped air blowing pipe member (1101), a T-shaped slider (1102), a sealing plate (1103), a C-shaped driving plate (1104), an air conveying hose (1105) and a strip-shaped through opening (1106). Eight T-shaped sliders (1102) are fixedly connected to the outside of the frame-shaped air blowing pipe member (1101), and the eight T-shaped sliders (1102) are respectively slidably connected to eight T-shaped chutes (1010); A sealing plate (1103) is fixedly connected to the left side of the upper and lower end faces of the frame-shaped air blowing pipe member (1101), and the left side surfaces of the two sealing plates (1103) are in contact with the left inner surface of the fluidized bed furnace (1); A C-shaped driving plate (1104) is fixedly connected to the left and right sides of the upper end face of the frame-shaped air blowing pipe member (1101), and a strip-shaped through opening (1106) is provided in the upper part of the opposite surfaces of the two C-shaped driving plates (1104); The left air inlet of the frame-shaped air blowing pipe member (1101) is connected with an air conveying hose (1105), and the left end of the air conveying hose (1105) is fixedly connected with the secondary air hard pipe (108); The driving mechanism (12) includes a driving shaft (1201), a driving shaft (1202), a circular driving disc (1203), a driving column (1204) and a driving motor (1205). The driving shaft (1201) is rotatably connected to the rear side of the fluidized bed furnace (1), and a first sprocket is installed at both the left and right ends of the driving shaft (1201). A worm gear is fixedly installed in the middle of the outside of the driving shaft (1201). The number of driving shafts (1202) is two, and the two driving shafts (1202) are respectively rotatably connected to the left and right sides of the fluidized bed furnace (1), and the two driving shafts (1202) respectively penetrate the left and right side walls of the fluidized bed furnace (1); A second sprocket is installed at the opposite ends of the two driving shafts (1202), and the second sprocket is connected to the first sprocket by a chain drive; A circular driving disc (1203) is installed at the opposite ends of the two driving shafts (1202), and a driving column (1204) is fixedly connected to the edge of the opposite surfaces of the two circular driving discs (1203), and the two driving columns (1204) are respectively located inside the two strip-shaped through openings (1106); The driving motor (1205) is installed on the rear end face of the fluidized bed furnace (1), and a worm meshing with the worm gear is fixedly installed on the rotating shaft of the driving motor (1205).

2. A circulating fluidized bed air volume control system according to claim 1, characterized in that: A first air inlet (103) is provided at the lower end of the fluidized bed furnace (1), and the lower end of the first air inlet (103) is connected with a primary air pipeline (106), and the other end of the primary air pipeline (106) is connected with the air outlet of an upper air preheater (301); The left end of the secondary air hard pipe (108) is connected with a secondary air pipeline (107), and the other end of the secondary air pipeline (107) is connected with the air outlet of a lower air preheater (301); An electric air flow valve (109) is installed on both the primary air pipeline (106) and the secondary air pipeline (107).

3. A circulating fluidized bed air volume control system according to claim 2, characterized in that: A return port (105) is provided at the lower right side of the fluidized bed furnace (1), and the other end of the return port (105) is connected to the discharge port at the lower end of the separator (2) through a pipeline.

4. The circulating fluidized bed air volume control system according to claim 1, characterized in that: The primary fan (4) further comprises a driving pulley (407), a stud (408), a nut (409) and a locking gear (4010); the driving pulley (407) is fixedly mounted on the transmission shaft (404); four studs (408) are fixedly connected to the left side of the upper end surface of the support seat (401), and the four studs (408) penetrate the base of the motor (405); the outside of each stud (408) is connected to a nut (409) by a thread, and the bottom of each nut (409) is fixedly connected to a locking gear (4010).

5. The circulating fluidized bed air volume control system according to claim 1, characterized in that: The circulating lubrication assembly (9) comprises a cooling box (901), an oil storage shell (902), an oil delivery pump body (903), a flow distribution pipe (904), a rotating shaft (905), a driven pulley (906), a manifold (907), a fuel filler pipe head (908) and a heat dissipation fin (909). The cooling box (901) is fixedly mounted on the upper end surface of the support seat (401), and an oil storage shell (902) is mounted inside the cooling box (901). The front and rear sides of the oil storage shell (902) are respectively provided with an oil outlet and an oil inlet, and the oil outlet and the oil inlet respectively penetrate the front and rear side walls of the cooling box (901); the oil delivery pump body (903) is mounted on the front side of the support platform (402), and the oil suction port of the oil delivery pump body (903) is connected to the oil outlet on the front side of the oil storage shell (902) through an oil pipe. The oil outlet of the oil storage housing (903) is connected to a flow distribution pipe (904) through an oil pipe, and the flow distribution pipe (904) is connected to five oil inlet pipe heads (4011); the oil inlet pipe port on the rear side of the oil storage housing (902) is connected to a manifold (907), and the other two ends of the manifold (907) are respectively connected to two oil outlet pipe heads (4012); a refueling pipe head (908) is provided on the upper part of the oil storage housing (902), and a sealing cover is connected to the upper end of the refueling pipe head (908) through a thread, and heat dissipation fins (909) are evenly provided on the left and right end surfaces of the oil storage housing (902); a rotating shaft (905) is fixedly connected to the input shaft of the oil delivery pump body (903), and a passive pulley (906) is installed on the right end of the rotating shaft (905), and the passive pulley (906) is connected to the driving pulley (407) through a belt.

6. A circulating fluidized bed air volume control system according to claim 4, characterized in that: The anti-loosening mechanism (10) comprises an anti-loosening housing (1001), a sliding block (1002), a tightening block (1003), a locking tooth block (1004), a rotating rod (1005) and an L-shaped limit block (1006); the anti-loosening housing (1001) is fixedly mounted on a base of a motor (405), and the sliding block (1002) is slidably connected inside the anti-loosening housing (1001); a tightening block (1003) penetrating the head of the anti-loosening housing (1001) is provided on a head end surface of the sliding block (1002), and two locking tooth blocks (1004) are provided on a head end surface of the tightening block (1003); the bottom of the sliding block (1002) is rotatably connected to a rotating rod (1005); and the outside of the anti-loosening housing (1001) is fixedly connected to an L-shaped limit block (1006).

7. A circulating fluidized bed air volume control system according to claim 6, characterized in that: When the anti-loosening mechanism (10) is in the anti-loosening state, the head end of the locking tooth block (1004) is in close contact with the outer peripheral surface of the locking gear (4010).

8. The circulating fluidized bed air volume control system according to claim 1, characterized in that: When the two circular driving disks (1203) rotate with the two driving columns (1204), the two driving columns (1204) move the two U-shaped driving plates (1104) and the frame-shaped blowing pipe (1101) up and down.

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