A coal-saving combustion device for boiler

Abstract

The present invention relates to the technical field of boiler combustion, and discloses a coal-saving combustion device for a boiler, comprising a raw material conveying mechanism and an adjustable grinding mechanism. The coal-saving combustion device for a boiler utilizes the relative rotation between two discs to grind the coal blocks into fine structures, so that the coal blocks can be fully burned to achieve the purpose of energy-saving combustion. In addition, the grinding area between the two discs occupies a larger proportion relative to the volume of the discs. At the same time, the coal blocks can act on the grinding area with a rated force in a spiral feeding manner, thereby increasing the force between the coal blocks and the grinding surface to improve the grinding efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of boiler combustion, in particular to a coal-saving combustion device for a boiler. Background Art

[0002] At present, most of the coal used for combustion in various boilers, reverberatory furnaces, and drying kilns is directly put into the kiln for combustion. Since the raw coal contains a large number of coal particles and fragments, these coal particles and fragments are not fully burned and are converted into smoke and waste residues for discharge, which not only pollutes the environment but also causes energy waste. Therefore, the coal-saving combustion device for boilers has been widely used. It first grinds the coal blocks into powder and then burns them, which can make the coal burn fully, greatly reducing pollution to the environment and energy waste.

[0003] For example, the Chinese patent with the publication number "CN205084783U" discloses "a coal-saving combustion device for boilers", whose main structure includes a feeding mechanism; the feeding mechanism includes a crushing device and a hopper; the crushing device includes an active squeeze roller, a driven squeeze roller and a driving device for driving the active squeeze roller to rotate; the active squeeze roller and the driven squeeze roller are rotatably installed in the hopper and connected through a transmission mechanism; the active squeeze roller and the driven squeeze roller both include roller shafts; the surfaces of the active squeeze roller and the driven squeeze roller are meshed with gears but not in contact with each other. When the coal blocks pass through the hopper, they are initially crushed by the crushing device arranged inside the hopper, so that the particle size of the coal blocks becomes smaller, the burden of the fly hammer is reduced, and the equipment is protected from damage.

[0004] Obviously, the above-mentioned method used for coal-saving combustion device in boiler to crush coal blocks is: relative rotation of active squeezing roller and driven squeezing roller enables coal blocks to be ground and crushed under the squeezing of active squeezing roller and driven squeezing roller, but it has the following defects: 1. The working surfaces of active squeezing roller and driven squeezing roller are only the parallel clamping areas of the two, resulting in that the effective grinding area occupies a small proportion relative to the total volume of active squeezing roller and driven squeezing roller; 2. The coal blocks located on the working surfaces of active squeezing roller and driven squeezing roller can only rely on their own gravity to generate downward pressure relative to the active squeezing roller and driven squeezing roller, resulting in that the downward pressure of coal blocks at the grinding part is relatively small, seriously affecting its working efficiency. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a coal-saving combustion device for boilers, which utilizes the relative rotation between two disks to grind coal blocks into fine structures so that the coal blocks can be fully burned, thereby achieving the purpose of energy-saving combustion. In addition, the grinding area between the two disks occupies a larger proportion relative to the volume of the disks. At the same time, the coal blocks can be acted on the grinding area with a rated force in a spiral feeding manner, thereby increasing the force between the coal blocks and the grinding surface to improve the grinding efficiency, thereby solving the above-mentioned technical problems.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a coal-saving combustion device for a boiler, comprising a No. 1 supporting upright plate and a No. 2 supporting upright plate which are arranged opposite to each other and have mounting openings therein, an annular collecting shell located between the No. 1 supporting upright plate and the No. 2 supporting upright plate, an annular raw material collecting chamber which is arranged inside the annular collecting shell and has an open top, a curved discharge channel which is arranged at the bottom of the annular collecting shell and is used to discharge the raw materials in the annular raw material collecting chamber under the action of gravity, and an annular opening structure which is arranged at both ends of the annular collecting shell, and also comprises a raw material conveying mechanism, which has a channel which is fixedly installed in the mounting opening of the No. 1 supporting upright plate and can be horizontally conveyed therein. A raw material conveying shell for conveying raw materials, a fixed grinding disk arranged at one end of the raw material conveying shell and located inside the annular raw material collecting chamber, and a spiral impeller structure that can discharge the raw materials toward the inside of the annular raw material collecting chamber when rotating; and an adjustable grinding mechanism, wherein a transverse hollow shell is arranged inside the shell, which is installed in the mounting opening of the second supporting vertical plate through a bearing and can rotate, an inner movable block is located inside the transverse hollow shell and can rotate with the transverse hollow shell, a rotating grinding disk that moves with the inner movable block and cooperates with the fixed grinding disk to grind the raw materials, and an external threaded rod that can change the distance between the fixed grinding disk and the rotating grinding disk.

[0007] Preferably, the raw material conveying mechanism includes a raw material conveying shell, a part of the outer circumferential surface of the raw material conveying shell is fixedly installed in the mounting port of the No. 1 supporting vertical plate and one of the annular opening structures, the raw material conveying shell is provided with a fixed grinding disc with an integral structure therewith at one end located inside the annular raw material collecting chamber, a raw material conveying chamber is provided inside the raw material conveying shell, a conical guide chamber connecting the external space and one end of the raw material conveying chamber is provided at one end of the raw material conveying shell close to the fixed grinding disc, a No. 1 component mounting hole connecting the external space and the other end of the raw material conveying chamber is provided at one end of the raw material conveying shell away from the fixed grinding disc, and a raw material dropping conduit with an integral structure therewith is provided at the top of the circumferential surface of the raw material conveying shell. The top of the raw material dropping pipeline is provided with a funnel-shaped collecting shell with an integral structure therewith, and the interior of the funnel-shaped collecting shell is provided with a funnel-shaped collecting groove with an open top, and the interior of the raw material dropping pipeline is provided with a raw material dropping hole connecting the bottom end of the funnel-shaped collecting groove and the raw material conveying cavity, and a No. 1 rotating shaft is placed at the center of the raw material conveying shell, and the No. 1 rotating shaft is installed through a bearing on the shaft body located inside the No. 1 component mounting hole, and one end of the No. 1 rotating shaft extends to the outside of the raw material conveying shell, and the No. 1 rotating shaft is provided with an integral spiral impeller structure on the shaft body located inside the raw material conveying cavity, and the No. 1 rotating shaft is provided with a tip structure at one end located inside the raw material conveying cavity for facilitating the flow of raw materials.

[0008] Preferably, the structural radius of one end of the conical guide cavity is the same as the structural radius of the raw material conveying cavity, and the structural radius of the other end of the conical guide cavity is larger than the structural radius of the raw material conveying cavity and smaller than the structural radius of the outer circumferential surface of the fixed grinding disk.

[0009] Preferably, the diameter of the top end of the funnel-shaped collecting trough is larger than the diameter of the bottom end thereof, and the structural radius of the bottom end of the funnel-shaped collecting trough is consistent with the structural radius of the raw material dropping hole.

[0010] Preferably, the adjustable grinding mechanism includes a transverse hollow shell, part of the outer circumferential surface of the transverse hollow shell is installed in the mounting opening of the No. 2 supporting vertical plate through a bearing, and the outer circumferential surface of the transverse hollow shell passes through the other annular structure, the circumferential surface of the transverse hollow shell is provided with a No. 1 pulley structure integrally formed therewith, a transverse component movable cavity is provided inside the transverse hollow shell, a No. 1 component through-hole connecting the external space and one end of the transverse component movable cavity is provided at one end of the transverse hollow shell located inside the annular raw material collecting cavity, an internal threaded hole connecting the external space and the other end of the transverse component movable cavity is provided at one end of the transverse hollow shell located outside the annular raw material collecting cavity, and the transverse hollow shell is provided with a No. 1 component through-hole connecting the external space and one end of the transverse component movable cavity at one end of the transverse hollow shell located outside the annular raw material collecting cavity. An inner movable block capable of axially moving along the movable cavity of the transverse component is placed inside the movable cavity of the transverse component, a transverse push-pull rod penetrating the through-hole of component No. 1 is fixedly installed on the end face of the inner movable block facing the through-hole of component No. 1, a rotating grinding disc symmetrical to the fixed grinding disc is fixedly installed on the end of the transverse push-pull rod located inside the annular raw material collecting cavity, an externally threaded rod is installed on the interior of the internal threaded hole of the transverse hollow outer shell through a threaded structure, a raised shaft structure integral with the externally threaded rod is provided on one end located inside the movable cavity of the transverse component, the raised shaft structure is installed inside the other end of the inner movable block through a bearing, and a rotating wheel is fixedly installed on the end face of the externally threaded rod located outside the movable cavity of the transverse component.

[0011] Preferably, the structural shape of the cross section of the movable cavity of the transverse component is consistent with the structural shape of the cross section of the transverse push-pull rod, both are polygonal structures, and the structural dimensions of the cross section of the movable cavity of the transverse component match the structural dimensions of the cross section of the transverse push-pull rod.

[0012] Preferably, the threaded structure includes an internal threaded structure arranged in the internal threaded hole and an external threaded structure arranged on the rod body of the external threaded rod, and the internal threaded structure matches the external threaded structure.

[0013] Preferably, it also includes a pressure-controlled driven mechanism, which is internally provided with a rotatable outer rotating shell, an inner rotating column placed in the middle of the outer rotating shell through a bearing and capable of driving the No. 1 rotating shaft to rotate, an annular rubber bag embedded in the outer rotating shell and capable of wrapping and clamping the outer circumferential surface of the inner rotating column, and a valve plate capable of controlling the maximum wrapping strength between the annular rubber bag and the inner rotating column.

[0014] Preferably, the pressure-controlled driven mechanism comprises an outer rotating shell and an inner rotating column, the outer circumferential surface of the outer rotating shell is provided with a No. 2 pulley structure integrally formed therewith, a central mounting cavity is provided at the center of the outer rotating shell, both ends of the outer periphery of the inner rotating column are mounted inside the central mounting cavity of the outer rotating shell through bearings, one end of the inner rotating column is provided with a component fixing groove for fixing and mounting the No. 1 rotating shaft, an annular rubber bag is embedded in the inner circumferential surface of the outer rotating shell located in the central mounting cavity, an inner annular closed cavity is formed between the outer circumferential surface of the annular rubber bag and the inner circumferential surface of the central mounting cavity, an outer annular air cavity communicating with the outside of the inner annular closed cavity is provided inside the outer rotating shell, and the interior of the outer rotating shell An inflation passage connecting the external space and one end of the outer annular air cavity and having an air valve installed therein is provided, a No. 1 gas flow hole connecting the other end of the outer annular air cavity is provided inside the outer rotating shell, a gas flow cavity is provided at one end of the No. 1 gas flow hole of the outer rotating shell at the end thereof, a No. 2 gas flow hole connecting one end of the gas flow cavity and the external space is provided inside the outer rotating shell, a valve plate which can move axially along the gas flow cavity is arranged inside the gas flow cavity of the outer rotating shell, a plurality of gas flow grooves for transverse flow of gas are arranged on the circumferential surface of the valve plate, one end of the valve plate abuts against one end surface of the No. 1 gas flow hole, and a coil spring in a compressed state is arranged at the other end of the valve plate.

[0015] Preferably, the structural radius of the No. 1 gas flow hole is smaller than the distance between the gas flow groove and the axial center line of the valve plate.

[0016] Compared with the prior art, the present invention provides a coal-saving combustion device for a boiler, which has the following

[0017] Beneficial effects:

[0018] This is used for boiler coal-saving combustion devices.

[0019] 1. The relative rotation between the two discs enables the coal blocks to be ground into fine structures, so that the coal blocks can be fully burned to achieve the purpose of energy-saving combustion. In addition, the grinding area between the two discs occupies a larger proportion relative to the volume of the discs. At the same time, the coal blocks can be fed in a spiral manner with a rated force to act on the grinding area, thereby increasing the force between the coal blocks and the grinding surface to improve the grinding efficiency.

[0020] 2. By setting up a raw material conveying mechanism, when coal blocks accumulate in the gap between the fixed grinding disk and the rotating grinding disk, the thrust of the spiral impeller structure on the coal blocks still exists. This thrust will cause the coal blocks to be squeezed against each other, so that the coal blocks located in the gap between the fixed grinding disk and the rotating grinding disk can maintain pressure on the grinding part, increase the pressure between the coal blocks, the fixed grinding disk and the rotating grinding disk, and thus improve the grinding efficiency.

[0021] 3. By setting up an adjustable grinding mechanism and changing the distance between the fixed grinding disc and the rotating grinding disc, the size of the coal block particles after grinding can be changed to achieve the adjustability of the particle size. When the coal blocks are accumulated between the fixed grinding disc and the rotating grinding disc, the rotating grinding disc will rotate with the rotor of the driving motor, and the coal blocks in the extruded state will be rotated to achieve a grinding effect, so that the coal blocks are ground into fine particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A perspective view of the present invention;

[0023] Figure 2 is a three-dimensional cross-sectional view of the present invention;

[0024] Figure 3 is a three-dimensional cross-sectional view of the annular collecting shell in the present invention;

[0025] Figure 4 It is a three-dimensional cross-sectional view of the material conveying mechanism in the present invention;

[0026] Figure 5 is a three-dimensional cross-sectional view of the adjustable grinding mechanism of the present invention;

[0027] Figure 6 It is a three-dimensional diagram of the inner movable block in the present invention;

[0028] Figure 7 It is a three-dimensional cross-sectional view of the pressure-controlled driven mechanism of the present invention;

[0029] Figure 8 It is a three-dimensional diagram of the valve plate in the present invention.

[0030] Among them: 1. Support plate No. 1; 2. Support plate No. 2; 3. Annular collection shell; 4. Annular raw material collection chamber; 5. Curved discharge channel; 6. Ring mouth structure; 7. Raw material conveying mechanism; 71. Raw material conveying shell; 72. Fixed grinding disc; 73. Raw material conveying chamber; 74. Raw material falling pipe; 75. Funnel-shaped collection shell; 76. Funnel-shaped collection trough; 77. Raw material falling hole; 78. No. 1 component installation hole; 79. Conical guide chamber; 710. No. 1 rotating shaft; 711. Spiral impeller structure; 712. Tip structure; 8. Adjustable grinding mechanism; 81. Horizontal hollow shell; 82. Horizontal component movable chamber; 83. No. 1 component perforation; 84. Internal Threaded hole; 85, inner movable block; 86, threaded structure; 87, external threaded rod; 88, rotating wheel; 89, raised shaft structure; 810, lateral push-pull rod; 811, No. 1 pulley structure; 812, rotating grinding disc; 9, pressure-controlled driven mechanism; 91, outer rotating shell; 92, No. 2 pulley structure; 93, inner rotating column; 94, inner annular closed cavity; 95, center mounting cavity; 96, outer annular air cavity; 97, component fixing groove; 98, annular rubber bag; 99, inflation channel; 910, gas flow cavity; 911, No. 1 gas flow hole; 912, valve plate; 913, spiral spring; 914, No. 2 gas flow hole; 915, gas flow groove. DETAILED DESCRIPTION

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

[0032] See also Figure 1 , Figure 2 and Figure 3, a coal-saving combustion device for a boiler, comprising a No. 1 supporting upright plate 1 and a No. 2 supporting upright plate 2 which are arranged opposite to each other and have mounting openings therein, an annular collecting shell 3 located between the No. 1 supporting upright plate 1 and the No. 2 supporting upright plate 2, an annular raw material collecting chamber 4 which is arranged inside the annular collecting shell 3 and has an open top, a curved discharge channel 5 which is arranged at the bottom of the annular collecting shell 3 and is used to discharge the raw materials in the annular raw material collecting chamber 4 under the action of gravity, and an annular mouth structure 6 which is arranged at both ends of the annular collecting shell 3, the discharge opening of the curved discharge channel 5 is connected to the feeding opening in the boiler for feeding coal block raw materials, and at the same time, a driving motor is used, a double pulley is installed at the rotor of the driving motor, and then the pulley, the No. 1 pulley structure 811 and the No. 2 pulley structure 92 are linked by two independent belts. It should be noted that after the driving motor is started, the driving direction of the spiral impeller structure 711 caused by it needs to be toward the annular raw material collecting chamber 4.

[0033] To achieve pressure-type conveying of coal, please refer to Figure 1 , Figure 2 and Figure 4 , it is necessary to set up a raw material conveying mechanism 7, which is provided with a raw material conveying shell 71 fixedly installed in the installation opening of the first supporting vertical plate 1 and capable of horizontally conveying raw materials, a fixed grinding disc 72 arranged at one end of the raw material conveying shell 71 and located inside the annular raw material collecting chamber 4, and a spiral impeller structure 711 that can discharge the raw materials toward the inside of the annular raw material collecting chamber 4 when rotating. The driving motor is started, and the rotor indirectly drives the spiral impeller structure 711 to rotate through the belt. At the same time, the coal blocks are put into the funnel-shaped collecting trough 76. Under the action of gravity, the coal blocks fall downward and finally accumulate near the spiral impeller structure 711. When the wheel structure 711 rotates, the coal blocks will generate thrust toward the annular raw material collecting chamber 4, thereby moving the coal blocks forward. The coal blocks will have a certain kinetic energy during the movement. When the coal blocks are accumulated in the gap between the fixed grinding disk 72 and the rotating grinding disk 812, the thrust of the spiral impeller structure 711 on the coal blocks still exists. This thrust will cause the coal blocks to be squeezed against each other, so that the coal blocks located in the gap between the fixed grinding disk 72 and the rotating grinding disk 812 can maintain pressure on the grinding part, increase the pressure between the coal blocks, the fixed grinding disk 72 and the rotating grinding disk 812, and thus improve the grinding efficiency.

[0034] For the specific structure of the raw material conveying mechanism 7, please refer to Figure 4, including a raw material conveying shell 71, part of the outer circumferential surface of the raw material conveying shell 71 is fixedly installed in the installation port of the No. 1 supporting vertical plate 1 and one of the ring-shaped structures 6, the raw material conveying shell 71 is provided with a fixed grinding disc 72 of an integral structure therewith at one end located inside the annular raw material collecting chamber 4, a raw material conveying chamber 73 is provided inside the raw material conveying shell 71, the raw material conveying shell 71 is provided with a conical guide chamber 79 connecting the external space and one end of the raw material conveying chamber 73 at one end close to the fixed grinding disc 72, the structural radius of one end of the conical guide chamber 79 is the same as the structural radius of the raw material conveying chamber 73, the structural radius of the other end of the conical guide chamber 79 is larger than the structural radius of the raw material conveying chamber 73, and smaller than the structural radius of the outer circumferential surface of the fixed grinding disc 72, the raw material conveying shell 71 is provided with a No. 1 component mounting hole 78 connecting the external space and the other end of the raw material conveying chamber 73 at one end away from the fixed grinding disc 72, and the top of the circumferential surface of the raw material conveying shell 71 is provided with a raw material drop hole of an integral structure therewith. The raw material dropping pipe 74 is provided with a funnel-shaped collecting shell 75 having an integral structure therewith at the top of the raw material dropping pipe 74, and a funnel-shaped collecting groove 76 having an open top is provided inside the funnel-shaped collecting shell 75, and a raw material dropping hole 77 connecting the bottom end of the funnel-shaped collecting groove 76 and the raw material conveying cavity 73 is provided inside the raw material dropping pipe 74, and the diameter of the top end of the funnel-shaped collecting groove 76 is larger than the diameter of the bottom end thereof, and the structural radius of the bottom end of the funnel-shaped collecting groove 76 is consistent with the structural radius of the raw material dropping hole 77, and the raw material dropping hole 77 is provided inside the raw material dropping pipe 74. A No. 1 rotating shaft 710 is placed at the center of the raw material conveying shell 71. The No. 1 rotating shaft 710 is installed through a bearing on the shaft body located inside the No. 1 component mounting hole 78, and one end of the No. 1 rotating shaft 710 extends to the outside of the raw material conveying shell 71. The No. 1 rotating shaft 710 is provided with an integrated spiral impeller structure 711 on the shaft body located inside the raw material conveying chamber 73, and the No. 1 rotating shaft 710 is provided with a tip structure 712 at one end located inside the raw material conveying chamber 73 to facilitate the flow of raw materials.

[0035] To achieve effective control of abrasive particle size, refer to Figure 1 , Figure 2 , Figure 5 and Figure 6, it is necessary to set up an adjustable grinding mechanism 8, which is provided with a horizontal hollow shell 81 installed in the installation opening of the second supporting vertical plate 2 through a bearing and capable of rotating, an inner movable block 85 located inside the horizontal hollow shell 81 and capable of rotating with the horizontal hollow shell 81, a rotating grinding disk 812 that moves with the inner movable block 85 and cooperates with the fixed grinding disk 72 to grind the raw material, and an external threaded rod 87 that can change the distance between the fixed grinding disk 72 and the rotating grinding disk 812. By rotating the rotating wheel 88, the external threaded rod 87 can be driven to rotate. Due to the threaded structure 8 6, the inner movable block 85 will drive the rotating grinding disc 812 to move horizontally, thereby changing the distance between the fixed grinding disc 72 and the rotating grinding disc 812, and then changing the size of the coal block particles after grinding, and realizing the adjustability of the particle size. When the coal blocks are accumulated between the fixed grinding disc 72 and the rotating grinding disc 812, the rotating grinding disc 812 will rotate with the rotor of the driving motor, and the coal blocks in the extruded state will be ground into fine particles when rotating, and the ground particles will finally be discharged into the boiler through the curved discharge channel 5.

[0036] For the specific structure of the adjustable grinding mechanism 8, please refer to Figure 5 and Figure 6, comprising a transverse hollow shell 81, part of the outer circumferential surface of the transverse hollow shell 81 is installed in the installation opening of the second supporting vertical plate 2 through a bearing, and the outer circumferential surface of the transverse hollow shell 81 passes through another annular structure 6, the circumferential surface of the transverse hollow shell 81 is provided with a first pulley structure 811 of an integral structure therewith, the interior of the transverse hollow shell 81 is provided with a transverse component active cavity 82, and the transverse hollow shell 81 is provided with a connecting hole 82 at one end located inside the annular raw material collecting cavity 4 for connecting the external space and the transverse component active cavity The first component through hole 83 at one end of the movable cavity 82, the transverse hollow shell 81 is provided with an internal threaded hole 84 at one end located outside the annular raw material collecting chamber 4, which is connected to the external space and the other end of the transverse component movable cavity 82, the transverse hollow shell 81 is provided with an inner movable block 85 capable of axially moving along the transverse component movable cavity 82 inside the transverse component movable cavity 82, the inner movable block 85 is fixedly installed with a transverse push-pull rod 810 passing through the first component through hole 83 on one end surface facing the first component through hole 83, the transverse component movable cavity 82 is provided with an inner threaded hole 84 at one end of the transverse hollow shell 81, and the inner threaded hole 84 is connected to the outer space of the transverse component movable cavity 82, and the inner threaded hole 84 is connected to the inner threaded hole 84 of the transverse hollow shell 81. The structural shape of the cross section of the movable cavity 82 is consistent with the structural shape of the cross section of the transverse push-pull rod 810, both of which are polygonal structures, and the structural dimensions of the cross section of the movable cavity 82 of the transverse component match the structural dimensions of the cross section of the transverse push-pull rod 810. The transverse push-pull rod 810 is fixedly installed with a rotating grinding disc 812 symmetrical to the fixed grinding disc 72 at one end located inside the annular raw material collecting cavity 4, and the transverse hollow shell 81 is installed with an external threaded rod 87 through a threaded structure 86 inside the internal threaded hole 84. Specifically, the threaded structure 86 includes an internal threaded structure arranged in the internal threaded hole 84 and an external threaded structure arranged on the rod body of the external threaded rod 87, and the internal threaded structure matches the external threaded structure. The external threaded rod 87 is provided with a protruding shaft structure 89 of an integrated structure therewith at one end located inside the movable cavity 82 of the transverse component, and the protruding shaft structure 89 is installed inside the other end of the inner movable block 85 through a bearing, and the external threaded rod 87 is fixedly installed with a rotating wheel 88 on one end face located outside the movable cavity 82 of the transverse component.

[0037] To prevent damage to the drive motor caused by excessive coal accumulation, please refer to Figure 1 , Figure 2 , Figure 7 and Figure 8, it is necessary to set up a pressure-controlled driven mechanism 9, which is provided with a rotatable outer rotating shell 91, an inner rotating column 93 placed in the middle of the outer rotating shell 91 through a bearing and capable of driving the No. 1 rotating shaft 710 to rotate, an annular rubber bag 98 embedded in the outer rotating shell 91 and capable of wrapping and clamping the outer circumference of the inner rotating column 93, and a valve plate 912 capable of controlling the maximum wrapping strength between the annular rubber bag 98 and the inner rotating column 93. Gas is filled into the outer annular air cavity 96 by using an inflating device until the gas pressure is greater than the elastic strength of the coil spring 913. When the gas is observed to flow along the No. 2 gas flow path, the outer annular air cavity 96 is filled with gas until the gas pressure is greater than the elastic strength of the coil spring 913. When hole 914 is discharged outward, the inflation device is closed, indicating that the gas injection amount reaches the requirement at this time. Since the coal blocks are continuously accumulated between the fixed grinding disk 72 and the rotating grinding disk 812, the torque strength required for the rotation of the No. 1 rotating shaft 710 will increase. When the torque strength is greater than the maximum wrapping strength between the annular rubber bag 98 and the inner rotating column 93, at this time, the outer rotating shell 91 can continue to rotate with the rotor of the drive motor, but the inner rotating column 93 is in a stationary state, and relative rotation will occur between the two, so that the torque strength when the rotor rotates will not be further increased, thereby forming a protective function for the drive motor.

[0038] For the specific structure of the pressure-controlled driven mechanism 9, please refer to Figure 7 and Figure 8, comprising an outer rotating shell 91 and an inner rotating column 93, wherein the outer circumferential surface of the outer rotating shell 91 is provided with a second pulley structure 92 of an integral structure therewith, a central mounting cavity 95 is provided at the center of the outer rotating shell 91, and the outer peripheries of both ends of the inner rotating column 93 are mounted inside the central mounting cavity 95 of the outer rotating shell 91 through bearings, and one end of the inner rotating column 93 is provided with a component fixing groove 97 for fixing and mounting the first rotating shaft 710, and the outer circumferential surface of the outer rotating shell 91 located in the central mounting cavity 95 is embedded with an annular rubber bag 98, and an inner annular closed cavity 94 is formed between the outer circumferential surface of the annular rubber bag 98 and the inner circumferential surface of the central mounting cavity 95, and an outer annular air cavity 96 communicating with the outside of the inner annular closed cavity 94 is provided inside the outer rotating shell 91, and an inflation channel 99 communicating with the external space and one end of the outer annular air cavity 96 and having an air valve installed inside is provided inside the outer rotating shell 91. The outer rotating shell 91 is provided with a No. 1 gas flow hole 911 connected to the other end of the outer annular air cavity 96, the outer rotating shell 91 is provided with a gas flow cavity 910 at one end of the No. 1 gas flow hole 911, and the outer rotating shell 91 is provided with a No. 2 gas flow hole 914 connecting one end of the gas flow cavity 910 and the external space, the outer rotating shell 91 is provided with a valve plate 912 capable of axially moving along the gas flow cavity 910 in the gas flow cavity 910, the circumferential surface of the valve plate 912 is provided with a plurality of gas flow grooves 915 for transverse flow of gas, the structural radius of the No. 1 gas flow hole 911 is smaller than the distance between the gas flow groove 915 and the axial center line of the valve plate 912, one end of the valve plate 912 abuts against one end face of the No. 1 gas flow hole 911, and a coil spring 913 in a compressed state is provided at the other end of the valve plate 912.

[0039] The specific working principle of the present invention is to connect the discharge port of the curved discharge channel 5 with the discharge port for placing coal blocks in the boiler, and at the same time, use a driving motor, install a double pulley on the rotor of the driving motor, and then make the pulley, the first pulley structure 811 and the second pulley structure 92 linked by two independent belts. It should be noted that after the driving motor is started, the driving direction of the spiral impeller structure 711 caused by it needs to be toward the annular raw material collecting chamber 4;

[0040] Use the gas charging device to charge the outer annular gas cavity 96 with gas until the gas pressure is greater than the elastic strength of the coil spring 913. When the gas is observed to be discharged outward along the second gas flow hole 914, close the gas charging device;

[0041] The coal blocks are put into the funnel-shaped collecting trough 76. Under the action of gravity, the coal blocks fall downward and finally accumulate near the spiral impeller structure 711. When the spiral impeller structure 711 rotates, the coal blocks will generate thrust toward the annular raw material collecting chamber 4. At the same time, the rotating grinding disc 812 will rotate with the rotor of the driving motor, and the coal blocks in the extruded state will be ground into fine particles. The ground particles will finally be discharged into the boiler through the curved discharge channel 5.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal-saving combustion device for a boiler, comprising a first supporting plate (1) and a second supporting plate (2) which are arranged opposite to each other and have mounting openings therein, an annular collecting shell (3) located between the first supporting plate (1) and the second supporting plate (2), an annular raw material collecting chamber (4) which is arranged inside the annular collecting shell (3) and has an open top, a curved discharge channel (5) which is arranged at the bottom of the annular collecting shell (3) and is used to discharge raw materials in the annular raw material collecting chamber (4) under the action of gravity, and an annular opening structure (6) which is arranged at both ends of the annular collecting shell (3), characterized in that: Also includes, A raw material conveying mechanism (7) is provided inside thereof with a raw material conveying housing (71) fixedly mounted in a mounting opening of the first supporting vertical plate (1) and capable of laterally conveying raw materials, a fixed grinding disc (72) disposed at one end of the raw material conveying housing (71) and located inside the annular raw material collecting chamber (4), and a spiral impeller structure (711) capable of discharging the raw materials toward the inside of the annular raw material collecting chamber (4) when rotating; and an adjustable grinding mechanism (8), wherein a rotatable transverse hollow outer shell (81) is mounted in the mounting opening of the second supporting vertical plate (2) via a bearing, an inner movable block (85) is located inside the transverse hollow outer shell (81) and is capable of rotating with the transverse hollow outer shell (81), a rotating grinding disk (812) that moves with the inner movable block (85) and cooperates with the fixed grinding disk (72) to grind the raw material, and an external threaded rod (87) that is capable of changing the distance between the fixed grinding disk (72) and the rotating grinding disk (812); The raw material conveying mechanism (7) comprises a raw material conveying shell (71), part of the outer circumferential surface of the raw material conveying shell (71) is fixedly mounted in the mounting opening of the first supporting vertical plate (1) and one of the annular opening structures (6), the raw material conveying shell (71) is provided with a fixed grinding disc (72) in an integral structure with the raw material collecting chamber (4) at one end located inside the annular raw material collecting chamber (4), a raw material conveying chamber (73) is provided inside the raw material conveying shell (71), a conical guide chamber (79) is provided at one end of the raw material conveying shell (71) close to the fixed grinding disc (72) for connecting the external space and one end of the raw material conveying chamber (73), the raw material conveying shell (71) is provided with a first component mounting hole (78) in an end away from the fixed grinding disc (72) for connecting the external space and the other end of the raw material conveying chamber (73), and a raw material dropping pipe (74) in an integral structure with the raw material conveying shell (71) is provided at the top of the circumferential surface of the raw material conveying shell (71), the raw material dropping pipe (74) in an integral structure with the raw material conveying chamber (73) is provided at the top of the circumferential surface of the raw material conveying shell (71), and the raw material dropping pipe (74) is provided at the top of the circumferential surface of the raw material conveying shell (71). A funnel-shaped collecting shell (75) having an integral structure with the pipe (74) is provided at the top end thereof, a funnel-shaped collecting groove (76) having an open top end is provided inside the funnel-shaped collecting shell (75), a raw material dropping hole (77) communicating the bottom end of the funnel-shaped collecting groove (76) and the raw material conveying chamber (73) is provided inside the raw material dropping pipe (74), a No. 1 rotating shaft (710) is arranged at the center of the raw material conveying shell (71), the No. 1 rotating shaft (710) is mounted on a shaft body located inside the No. 1 component mounting hole (78) through a bearing, and one end of the No. 1 rotating shaft (710) extends to the outside of the raw material conveying shell (71), the No. 1 rotating shaft (710) is provided with an integral spiral impeller structure (711) on a shaft body located inside the raw material conveying chamber (73), and a tip structure (712) for facilitating the flow of raw materials is provided at one end of the No. 1 rotating shaft (710) located inside the raw material conveying chamber (73); It also includes a pressure-controlled driven mechanism (9), which is provided with a rotatable outer rotating shell (91) inside, an inner rotating column (93) placed in the middle of the outer rotating shell (91) via a bearing and capable of driving the first rotating shaft (710) to rotate, an annular rubber bag (98) embedded in the outer rotating shell (91) and capable of wrapping and clamping the outer circumferential surface of the inner rotating column (93), and a valve plate (912) capable of controlling the maximum wrapping strength between the annular rubber bag (98) and the inner rotating column (93); The pressure-controlled driven mechanism (9) comprises an outer rotating shell (91) and an inner rotating column (93); the outer circumferential surface of the outer rotating shell (91) is provided with a second pulley structure (92) which is an integral structure with the outer rotating shell (91); a central mounting cavity (95) is provided at the center of the outer rotating shell (91); both ends of the inner rotating column (93) are mounted inside the central mounting cavity (95) of the outer rotating shell (91) via bearings; one end of the inner rotating column (93) is provided with a component fixing groove (97) for fixing and mounting a first rotating shaft (710); an annular rubber bag (98) is embedded in the inner circumferential surface of the outer rotating shell (91) located in the central mounting cavity (95); an inner annular closed cavity (94) is formed between the outer circumferential surface of the annular rubber bag (98) and the inner circumferential surface of the central mounting cavity (95); an outer annular air cavity (96) which is connected to the outside of the inner annular closed cavity (94) is provided inside the outer rotating shell (91); and a connecting portion (97) which is connected to the inner circumferential surface of the inner rotating shell (91) is provided inside the outer rotating shell (91). The outer space and one end of the outer annular air cavity (96) are connected to the outer space and the gas filling passage (99) with a gas valve installed inside. The outer rotating shell (91) is provided with a first gas flow hole (911) connected to the other end of the outer annular air cavity (96). The outer rotating shell (91) is provided with a gas flow cavity (910) at one end located at the first gas flow hole (911). The outer rotating shell (91) is provided with a second gas flow cavity (910) connected to one end of the gas flow cavity (910) and the outer space. The outer rotating shell (91) is provided with a valve plate (912) which can move axially along the gas flow cavity (910) inside the gas flow cavity (910), and the circumferential surface of the valve plate (912) is provided with a plurality of gas flow grooves (915) for lateral flow of gas, one end of the valve plate (912) abuts against one end surface of the first gas flow hole (911), and the other end of the valve plate (912) is provided with a helical spring (913) in a compressed state.

2. The coal-saving combustion device for boilers according to claim 1, characterized in that: The structural radius of one end of the conical guide cavity (79) is the same as the structural radius of the raw material conveying cavity (73), and the structural radius of the other end of the conical guide cavity (79) is larger than the structural radius of the raw material conveying cavity (73) and smaller than the structural radius of the outer circumferential surface of the fixed grinding disc (72).

3. The coal-saving combustion device for boilers according to claim 1, characterized in that: The caliber of the top end of the funnel-shaped collecting groove (76) is larger than the caliber of the bottom end thereof, and the structural radius of the bottom end of the funnel-shaped collecting groove (76) is consistent with the structural radius of the raw material falling hole (77).

4. The coal-saving combustion device for boilers according to claim 1, characterized in that: The adjustable grinding mechanism (8) comprises a transverse hollow shell (81), part of the outer circumferential surface of the transverse hollow shell (81) is mounted in the mounting opening of the second supporting vertical plate (2) through a bearing, and the outer circumferential surface of the transverse hollow shell (81) passes through another of the annular opening structures (6), the circumferential surface of the transverse hollow shell (81) is provided with a first pulley structure (811) integrally formed therewith, a transverse component movable cavity (82) is provided inside the transverse hollow shell (81), the transverse hollow shell (81) is provided with a first component through hole (83) connecting the external space and one end of the transverse component movable cavity (82) at one end of the transverse hollow shell (81) located inside the annular raw material collecting cavity (4), the transverse hollow shell (81) is provided with an internal threaded hole (84) connecting the external space and the other end of the transverse component movable cavity (82) at one end of the transverse hollow shell (81) located outside the annular raw material collecting cavity (4), and the transverse hollow shell (81) is provided with a second threaded hole (84) connecting the external space and the other end of the transverse component movable cavity (82) at one end of the transverse hollow shell (81) located inside the transverse component movable cavity (82). An inner movable block (85) capable of axially moving along the movable cavity (82) of the transverse component is placed in the inner movable block (85); a transverse push-pull rod (810) passing through the through hole (83) of the first component is fixedly installed on the end face of the inner movable block (85) facing the through hole (83) of the first component; a rotating grinding disc (812) symmetrical to the fixed grinding disc (72) is fixedly installed on the end of the transverse push-pull rod (810) located inside the annular raw material collecting cavity (4); an external threaded rod (87) is installed inside the internal threaded hole (84) through a threaded structure (86) of the transverse hollow shell (81); a protruding shaft structure (89) integral with the external threaded rod (87) is provided at one end located inside the movable cavity (82) of the transverse component; the protruding shaft structure (89) is installed inside the other end of the inner movable block (85) through a bearing; a rotating wheel (88) is fixedly installed on the end face of the external threaded rod (87) located outside the movable cavity (82) of the transverse component.

5. The coal-saving combustion device for boilers according to claim 4, characterized in that: The structural shape of the cross section of the transverse component movable cavity (82) is consistent with the structural shape of the cross section of the transverse push-pull rod (810), both are polygonal structures, and the structural dimensions of the cross section of the transverse component movable cavity (82) match the structural dimensions of the cross section of the transverse push-pull rod (810).

6. The coal-saving combustion device for boilers according to claim 4, characterized in that: The thread structure (86) comprises an internal thread structure arranged in the internal thread hole (84) and an external thread structure arranged on the rod body of the external thread rod (87), and the internal thread structure matches the external thread structure.

7. The coal-saving combustion device for boilers according to claim 1, characterized in that: The structural radius of the No. 1 gas flow hole (911) is smaller than the distance between the axial center line of the gas flow groove (915) and the valve plate (912).

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