Feeding device for thermal power plant

Abstract

The invention discloses a feeding device for a thermal power plant, and belongs to the technical field of crushing and grinding. The device comprises a feeding mechanism and a limiting type crushing mechanism arranged in the feeding mechanism, a movable type crushing mechanism is further arranged in the feeding mechanism, a limiting type grinding mechanism is fixedly arranged on the inner wall of one side of the lower end in the feeding mechanism, and a movable type grinding mechanism is slidably arranged on the inner wall of the other side of the lower end in the feeding mechanism; a separation assembly is fixedly arranged on the outer side wall of the feeding mechanism, when fuel is crushed by the limiting type crushing mechanism and the movable type crushing mechanism, vertical force and transverse force can be applied to the fuel at the same time, and compared with a traditional crushing device only capable of generating force in the single direction, the crushing effect is better.

Description

Technical Field

[0001] The invention belongs to the technical field of crushing and grinding, and in particular relates to a feeding device for a thermal power plant. Background Art

[0002] A thermal power plant is a factory that uses combustibles as fuel. Its essence is to heat water through fuel combustion and generate a large amount of water vapor, and then use the water vapor to drive the steam turbine to drive the generator to rotate, thereby generating electricity. Before heating the water, the fuel must be fed into the boiler through a professional feeding device. The fuel burns inside the boiler and heats the water. The large amount of steam generated by the heated water can drive the steam turbine and generator to rotate and generate electricity.

[0003] Chinese patent CN220870910U discloses a feeding device for thermal power plants, including a box, a grinding component is arranged on the top of the box, a guide plate is arranged in the cavity and located at the bottom of the grinding component, and a material injection component is arranged in the cavity and located at the bottom inner wall of the box; the material injection component includes a hot air blower arranged on the bottom inner wall of the box, and a material drop box is arranged on one side of the hot air blower. The utility model can blow and inject the ground coal powder, and can make the combustion of the combustion chamber more complete.

[0004] Since the particle size of the fuel will affect the combustion efficiency of the fuel inside the boiler, the fuel needs to be crushed into a suitable particle size before feeding to ensure that the fuel is fully burned inside the boiler. Although the feeding device for thermal power plants proposed in the above-mentioned prior art can crush the fuel before feeding, it only crushes the fuel once, which easily leads to the phenomenon of unqualified fuel particle size. As for the current feeding device for thermal power plants, the fuel may need to be crushed multiple times before the fuel particle size can be qualified. Moreover, the crushing mechanism on the current feeding device for thermal power plants can often only generate a single vertical force or a lateral force when crushing the fuel, but cannot generate vertical force and lateral force at the same time. This limits the crushing capacity, crushing effect and crushing efficiency of the crushing mechanism, which in turn affects the feeding efficiency.

[0005] Therefore, we propose a feeding device for thermal power plants to solve the above-mentioned problems. Summary of the invention

[0006] In view of the problem that the crushing mechanism existing in the prior art can only generate vertical force or lateral force alone when crushing fuel, but cannot generate vertical force and lateral force at the same time, which limits the crushing capacity, crushing effect and crushing efficiency of the crushing mechanism and affects the feeding efficiency, the purpose of the present invention is to provide a feeding device for a thermal power plant.

[0007] In order to solve the above problems, the technical solution adopted by the present invention is as follows: a feeding device for a thermal power plant, comprising a feeding mechanism and a limited crushing mechanism arranged inside the feeding mechanism, a movable crushing mechanism is also arranged inside the feeding mechanism, a limited grinding mechanism is fixedly arranged on an inner wall on one side of the lower end of the feeding mechanism, a movable grinding mechanism is slidably arranged on the inner wall on the other side of the lower end of the feeding mechanism, and the movable crushing mechanism and the movable grinding mechanism are fixedly connected, a separation component is fixedly arranged on the outer wall of the feeding mechanism, the air inlet end of the separation component is connected to the inner cavity of the feeding mechanism through a pipeline, and the separation component and the movable crushing mechanism are fixedly connected, a storage bin is arranged below the feeding mechanism, the separation component and the storage bin are connected through a pipeline, and a conveying device is arranged below the storage bin.

[0008] Furthermore, the feeding mechanism includes an outer shell, and through grooves are symmetrically opened on the outer walls on both sides of the outer shell, and the opening edges outside the two through grooves are connected to and fixedly installed with expansion chambers, the movable crushing mechanism can slide inside the through grooves and the expansion chamber, and a first slide groove is opened on the side wall of the inner cavity of the outer shell, and the movable grinding mechanism is slidably installed on the first slide groove.

[0009] Furthermore, the position-limiting crushing mechanism includes a rotating device rotatably mounted on a position-limiting roller, a plurality of first crushing teeth are fixedly mounted on the circumferential side wall of the position-limiting roller, a first motor is fixedly mounted on the side wall of the outer shell, an output shaft of the first motor is rotatably arranged on the side wall of the outer shell, and the output shaft of the first motor is fixedly connected to the position-limiting roller.

[0010] Furthermore, the movable crushing mechanism includes a movable roller slidably installed in the through groove and the expansion chamber, a plurality of second crushing teeth are fixedly installed on the circumferential side wall of the movable roller, a load-bearing plate is fixedly installed on the side wall of the outer shell, a second slide groove is opened on the top surface of the load-bearing plate, a third slide groove is opened on the side wall of the load-bearing plate, the second slide groove and the third slide groove are connected, a sliding seat is slidably installed in the inner cavity of the second slide groove, a second motor is fixedly installed on the sliding seat, the output shaft of the second motor is fixedly installed on the middle axis of the movable roller, a pair of reciprocating hollow tubes are fixedly sleeved on the output shaft of the second motor, a threaded sleeve is fixedly installed on the top surface of the load-bearing plate, and the reciprocating hollow tube and the threaded sleeve are meshedly connected.

[0011] Furthermore, the first crushing tooth and the second crushing tooth are arranged in a staggered manner, and when the second crushing tooth moves back and forth left and right following the movable rotating roller, it will not interfere with the normal operation of the first crushing tooth.

[0012] Furthermore, the reciprocating hollow tube comprises a hollow sleeve fixedly sleeved on the output shaft of the second motor, and a reciprocating thread is arranged on the circumferential outer wall of the hollow sleeve.

[0013] Furthermore, the threaded sleeve comprises a pair of brackets fixedly mounted on the top surface of the load-bearing plate, a threaded sleeve body is fixedly mounted on the two brackets, and a meshing connection is formed between the threaded sleeve body and the reciprocating thread.

[0014] Furthermore, the limited grinding mechanism includes a limited guide plate fixedly mounted on the inner wall of one side of the lower end of the shell, a plurality of first cutting knives are fixedly mounted on the side wall of the upper part of the vertical surface of the limited guide plate, and a first grinding plate is fixedly mounted on the side wall of the lower part of the vertical surface of the limited guide plate.

[0015] Furthermore, the movable grinding mechanism includes a movable guide plate, a clamping plate is fixedly installed on the outer side wall of the movable guide plate, the clamping plate is embedded and slidably installed inside the first slide groove, a plurality of second cutters are fixedly installed on the side wall of the upper part of the vertical surface of the movable guide plate, and the second cutters are staggered with the first cutters, a second grinding plate is fixedly installed on the side wall of the lower part of the vertical surface of the movable guide plate, and the movable guide plate and the slide seat are fixedly connected by an L-shaped connecting rod.

[0016] Furthermore, the separation assembly includes a mounting plate fixedly mounted on the side wall of the outer shell, an air cylinder is fixedly mounted on the mounting plate, a piston is slidably mounted inside the air cylinder, a connecting rod is fixedly connected to the side wall of the piston, the distal end of the connecting rod passes through a third slide groove and is fixedly connected to the side wall of the slide seat, a one-way air outlet valve is fixedly mounted on the side wall of the air cylinder, a one-way air inlet valve is also fixedly mounted on the side wall of the air cylinder, a filter is fixedly mounted on the one-way air inlet valve, and the filter is connected to the outer shell and the storage bin through pipelines.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. When the first crushing teeth and the second crushing teeth in the present invention crush the fuel, they can simultaneously apply vertical force and lateral force to the fuel. Compared with the traditional crushing device that can only generate force in a single direction, the crushing effect is better.

[0018] 2. In the process of feeding in a thermal power plant, the fuel may need to be crushed several times before the particle size of the fuel can be qualified. The crushing method of the present invention can effectively reduce the number of subsequent fuel crushings, so the crushing efficiency is higher, which indirectly improves the feeding efficiency.

[0019] 3. When the crushing device of the present invention is used for work, on the premise of achieving primary crushing, the movable crushing mechanism can be used to reciprocate left and right to achieve the effect of secondary crushing and grinding. Not only is the equipment highly integrated and occupies a small area, but it also has a simple structure, high transmission efficiency and good crushing effect. It can also reduce the number of times the fuel is crushed and improve work efficiency.

[0020] 4. The separation component for separating the fuel dust in the present invention is also realized by the reciprocating movement of the movable crushing mechanism, and does not require an additional power device. While achieving the fuel dust filtering effect, it can also reduce the investment in equipment funds, which is also beneficial to control costs, reduce power consumption, and achieve energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 A magnified image of point A; Figure 3 The overall structure of the present invention is schematically shown in cross section. Figure 1 ; Figure 4 for Figure 3 The enlarged view of point B; Figure 5 The overall structure of the present invention is schematically shown in cross section. Figure 2 ; Figure 6 It is a disassembled schematic diagram of the feeding mechanism, the position-limiting crushing mechanism and the movable crushing mechanism of the present invention; Figure 7 It is a schematic diagram of the installation position of the card board of the present invention; Figure 8 It is a disassembly schematic diagram of the reciprocating hollow tube and the threaded sleeve of the present invention; Fig. 9 It is a schematic diagram of the installation position of the separation component of the present invention; Fig.10 for Fig. 9 Enlarged view of point C; Fig.11 It is a schematic diagram of the installation position of the expansion room of the present invention; Fig.12 for Fig.11 The enlarged view of point D; Fig.13 is a cross-sectional schematic diagram of a separation assembly of the present invention; Fig.14 for Fig.13 Enlarged view of point E.

[0022] In the figure: 1, feeding mechanism; 11, shell; 12, expansion chamber; 13, first slide; 14, through slot; 2, limited crushing mechanism; 21, limited roller; 22, first crushing tooth; 23, first motor; 3, movable crushing mechanism; 31, movable roller; 32, second crushing tooth; 33, bearing plate; 34, second slide; 35, third slide; 36, slide seat; 37, second motor; 38, reciprocating hollow tube; 381, hollow sleeve; 382, ​​reciprocating thread; 39, threaded sleeve; 391, Bracket; 392, threaded sleeve body; 4, limited grinding mechanism; 41, limited guide plate; 42, first cutter; 43, first grinding plate; 5, movable grinding mechanism; 51, movable guide plate; 52, second cutter; 53, clamping plate; 54, second grinding plate; 55, L-shaped connecting rod; 6, separation component; 7, storage bin; 8, pipeline; 9, conveying device; 61, mounting plate; 62, air cylinder; 63, piston; 64, connecting rod; 65, one-way air outlet valve; 66, filter; 67, one-way air inlet valve. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with specific embodiments.

[0024] In order to solve the problem that the existing crushing mechanism can only generate vertical force or lateral force when crushing fuel, but cannot generate vertical force and lateral force at the same time, which limits the crushing capacity, crushing effect and crushing efficiency of the crushing mechanism, such as Figure 1 - Fig.14 As shown: A feeding device for a thermal power plant comprises a feeding mechanism 1 and a limited-position crushing mechanism 2 arranged inside the feeding mechanism 1. A movable crushing mechanism 3 is also arranged inside the feeding mechanism 1.

[0025] Before feeding the boiler, the fuel is first put into the feeding mechanism 1, and the fuel is crushed by the cooperation of the limited crushing mechanism 2 and the movable crushing mechanism 3. The limited crushing mechanism 2 can only rotate during the process of crushing the fuel, while the movable crushing mechanism 3 can also reciprocate left and right while rotating. This makes it possible for the limited crushing mechanism 2 and the movable crushing mechanism 3 to apply vertical and lateral forces to the fuel at the same time when crushing the fuel. Compared with the traditional crushing device that can only generate force in a single direction, the crushing effect is better and the crushing efficiency is higher.

[0026] A limited grinding mechanism 4 is fixedly arranged on the inner wall on one side of the lower end of the feeding mechanism 1, and a movable grinding mechanism 5 is slidably arranged on the inner wall on the other side of the lower end of the feeding mechanism 1, and the movable crushing mechanism 3 is fixedly connected with the movable grinding mechanism 5, and the fuel crushed by the limited crushing mechanism 2 and the movable crushing mechanism 3 will enter between the limited grinding mechanism 4 and the movable grinding mechanism 5, and the movable crushing mechanism 3 will synchronously drive the movable grinding mechanism 5 to reciprocate left and right during the process of reciprocating left and right, so that a displacement difference is continuously generated between the movable grinding mechanism 5 and the limited grinding mechanism 4, thereby achieving the grinding effect, and a separation component 6 is fixedly arranged on the outer wall of the feeding mechanism 1, and the air inlet end of the separation component 6 is aligned with the inner wall of the feeding mechanism 1. The cavities are connected by pipes 8, and the separation component 6 is fixedly connected to the movable crushing mechanism 3. A large amount of dust will be generated in the process of crushing the fuel, and the movable crushing mechanism 3 will drive the separation component 6 to circulate during the reciprocating movement left and right, and the dust inside the feeding mechanism 1 will be sucked into the separation component 6, and the sucked dust gas will be filtered. A storage bin 7 is arranged below the feeding mechanism 1, and the separation component 6 and the storage bin 7 are connected by pipes 8. The fuel dust filtered by the separation component 6 will enter the storage bin 7 through the pipe 8 for subsequent combustion. A conveying device 9 is arranged below the storage bin 7, and the conveying device 9 is used to transport the fuel inside the storage bin 7 to the boiler for combustion.

[0027] The feeding mechanism 1 includes an outer shell 11, and through grooves 14 are symmetrically opened on the outer walls of both sides of the outer shell 11. The opening edges outside the two through grooves 14 are connected and fixedly installed with expansion chambers 12. The movable crushing mechanism 3 can slide inside the through grooves 14 and the expansion chamber 12. The setting of the expansion chamber 12 can increase the lateral distance of the outer shell 11, and provide displacement conditions for the movable crushing mechanism 3 to reciprocate left and right. A first slide groove 13 is opened on the side wall of the inner cavity of the outer shell 11, and the movable grinding mechanism 5 is slidably installed on the first slide groove 13. The first slide groove 13 can limit the movable grinding mechanism 5 to prevent the movable grinding mechanism 5 from deviating from the preset trajectory during the sliding process, so as to ensure that the movable grinding mechanism 5 and the limited grinding mechanism 4 can achieve the grinding effect on the fuel.

[0028] The limited crushing mechanism 2 includes a limited roller 21 rotatably mounted, a plurality of first crushing teeth 22 are fixedly mounted on the circumferential side wall of the limited roller 21, a first motor 23 is fixedly mounted on the side wall of the shell 11, an output shaft of the first motor 23 is rotatably arranged on the side wall of the shell 11, and the output shaft of the first motor 23 is fixedly connected to the limited roller 21, the first motor 23 drives the limited roller 21 and the first crushing teeth 22 to rotate, and provides vertical force during the fuel crushing process.

[0029] The movable crushing mechanism 3 includes a movable roller 31 slidably mounted inside the through groove 14 and the expansion chamber 12, a plurality of second crushing teeth 32 are fixedly mounted on the circumferential side wall of the movable roller 31, the second crushing teeth 32 cooperate with the first crushing teeth 22 to crush the fuel, a load-bearing plate 33 is fixedly mounted on the side wall of the shell 11, a second slide groove 34 is provided on the top surface of the load-bearing plate 33, a third slide groove 35 is provided on the side wall of the load-bearing plate 33, the second slide groove 34 is connected to the third slide groove 35, and the inner cavity of the second slide groove 34 is provided with a second slide groove 34. A slide seat 36 is slidably installed, and a second motor 37 is fixedly installed on the slide seat 36. The output shaft of the second motor 37 passes through and is fixedly installed at the middle axis of the movable roller 31. The second motor 37 is used to drive the movable roller 31 and the second crushing teeth 32 to rotate, so that the second crushing teeth 32 cooperate with the first crushing teeth 22 to achieve the crushing effect on the fuel. A pair of reciprocating hollow tubes 38 are fixedly sleeved on the output shaft of the second motor 37, and a threaded sleeve 39 is fixedly installed on the top surface of the load-bearing plate 33, and the reciprocating hollow tube 38 and the threaded sleeve 39 are meshed and connected.

[0030] When the second motor 37 drives the movable roller 31 and the second crushing tooth 32 to rotate, the reciprocating hollow tube 38 on the output shaft of the second motor 37 will rotate synchronously with the output shaft. Since the reciprocating hollow tube 38 is meshed with the threaded sleeve 39, when the reciprocating hollow tube 38 rotates, it will reciprocate left and right on the threaded sleeve 39, thereby driving the second motor 37 and the slide seat 36 to slide in the inner cavity of the second slide groove 34. At the same time, it will also drive the movable roller 31 and the second crushing tooth 32 to reciprocate left and right inside the housing 11. The second motor 37 drives the movable roller 31 and the second crushing tooth 32 to rotate, and can also drive the movable roller 31 and the second crushing tooth 32 to move back and forth left and right, so that the second crushing tooth 32 and the first crushing tooth 22 can continuously generate a displacement difference in the horizontal direction. In the process of fuel crushing, the second crushing tooth 32 and the first crushing tooth 22 can not only generate vertical force on the fuel but also generate lateral force on the fuel at the same time, which can effectively improve the crushing efficiency of the fuel, reduce the subsequent crushing process, and thus improve the feeding efficiency.

[0031] The first crushing tooth 22 and the second crushing tooth 32 are staggered, and the second crushing tooth 32 will not interfere with the normal operation of the first crushing tooth 22 when following the movable roller 31 to move back and forth. The purpose of such arrangement is that the first crushing tooth 22 and the second crushing tooth 32 can generate a vertical force on the fuel while also generating a lateral force on the fuel, which is beneficial to improving the crushing effect, and the first crushing tooth 22 and the second crushing tooth 32 do not interfere with each other during operation, thereby ensuring the smooth progress of the crushing operation.

[0032] The reciprocating hollow tube 38 comprises a hollow sleeve 381 fixedly sleeved on the output shaft of the second motor 37 , and a reciprocating thread 382 is arranged on the circumferential outer wall of the hollow sleeve 381 .

[0033] The threaded sleeve 39 includes a pair of brackets 391 fixedly mounted on the top surface of the load-bearing plate 33, and a threaded sleeve body 392 is fixedly mounted on the two brackets 391. The threaded sleeve body 392 is meshedly connected with the reciprocating thread 382. When the output shaft of the second motor 37 drives the reciprocating thread 382 on the hollow sleeve 381 to rotate synchronously, the threaded sleeve body 392 is meshedly connected with the reciprocating thread 382, ​​so that the hollow sleeve 381 can move back and forth inside the threaded sleeve body 392, thereby driving the entire movable crushing mechanism 3 to move back and forth.

[0034] Specifically, before feeding the boiler, the fuel is first put into the feeding mechanism 1, and the first motor 23 and the second motor 37 are started synchronously. The first motor 23 drives the limited roller 21 and the first crushing tooth 22 to rotate, and the second motor 37 drives the movable roller 31 and the second crushing tooth 32 to rotate. The limited roller 21 and the first crushing tooth 22 can only rotate during the process of crushing the fuel, while the movable roller 31 and the second crushing tooth 32 can reciprocate left and right while rotating under the cooperation of the reciprocating hollow tube 38 and the threaded sleeve 39. This makes it possible for the first crushing tooth 22 and the second crushing tooth 32 to apply vertical force and lateral force to the fuel at the same time when crushing the fuel. Compared with the traditional crushing device that can only generate force in a single direction, the crushing effect is better.

[0035] In the process of feeding in a thermal power plant, the fuel may need to be crushed several times before the particle size of the fuel can be qualified. The above-mentioned crushing method can effectively reduce the number of subsequent fuel crushings. Therefore, the crushing efficiency is higher, which indirectly improves the feeding efficiency.

[0036] In order to solve the problem that the traditional crushing device can only generate a single direction of force, if you want to achieve secondary crushing or grinding, you need to install an additional crushing device and grinding device, which will not only increase power consumption, but also be unfavorable to cost control. Figure 3 - Figure 5 As shown: The limited grinding mechanism 4 includes a limited guide plate 41 fixedly mounted on the inner wall of one side of the lower end of the shell 11, a plurality of first cutters 42 are fixedly mounted on the side wall of the upper part of the vertical surface of the limited guide plate 41, and a first grinding plate 43 is fixedly mounted on the side wall of the lower part of the vertical surface of the limited guide plate 41.

[0037] The movable grinding mechanism 5 includes a movable guide plate 51, on the outer side wall of the movable guide plate 51 is fixedly mounted a clamping plate 53, the clamping plate 53 is embedded and slidably mounted inside the first slide groove 13, a plurality of second cutters 52 are fixedly mounted on the side wall of the upper part of the vertical surface of the movable guide plate 51, and the second cutters 52 are staggered with the first cutters 42, a second grinding plate 54 is fixedly mounted on the side wall of the lower part of the vertical surface of the movable guide plate 51, and the movable guide plate 51 and the slide seat 36 are fixedly connected by an L-shaped connecting rod 55.

[0038] Specifically, the fuel crushed by the limited crushing mechanism 2 and the movable crushing mechanism 3 will fall on the first cutter 42 and the second cutter 52 under the guidance of the limited guide plate 41 and the movable guide plate 51. During the reciprocating movement of the movable crushing mechanism 3, the slide 36 will synchronously drive the movable guide plate 51, the second cutter 52, the clamping plate 53 and the second grinding plate 54 to reciprocate left and right through the L-shaped connecting rod 55, which makes the first cutter 42 and the second cutter 52 continuously produce a displacement difference, and then the fuel that has been crushed once is crushed again by the first cutter 42 and the second cutter 52, so that the particle size of the fuel becomes smaller again. The fuel crushed by the first and second cutters 52 will enter between the first grinding plate 43 and the second grinding plate 54. Since the second grinding plate 54 follows the movable guide plate 51 to continuously move back and forth left and right, a displacement difference is continuously generated between the first grinding plate 43 and the second grinding plate 54, thereby grinding the fuel crushed by the first and second cutters 42 and 52. Through the above-mentioned arrangement, on the premise that the limiting crushing mechanism 2 and the movable crushing mechanism 3 achieve one-time crushing, the movable crushing mechanism 3 is also used to achieve the second crushing and grinding effect by the reciprocating movement of the left and right stroke. At this time, the fuel crushing effect is significantly better than the traditional crushing device that can only generate a single-directional force.

[0039] Traditional crushing devices that can only generate force in a single direction need to additionally install a set of crushing devices and grinding devices if they want to achieve secondary crushing or grinding. Alternatively, multiple crushing effects can be achieved through gear-driven multiple sets of crushing rollers. If an additional set of crushing devices and grinding devices is installed, not only will power consumption increase, but also investment in equipment funds will increase, which is not conducive to cost control. If multiple crushing effects are achieved through gear-driven multiple sets of crushing rollers, problems such as low transmission efficiency and high power consumption will occur. When the crushing device of the present invention is used for work, it can achieve secondary crushing and grinding effects by utilizing the reciprocating movement of the movable crushing mechanism 3 while achieving primary crushing. The equipment not only has high integration and small footprint, but also has simple structure, high transmission efficiency, and good crushing effect. It can reduce the number of times the fuel is crushed and improve work efficiency.

[0040] In order to solve the problem that the mechanism for filtering fuel dust in the feeding device of a conventional thermal power plant needs to be separately set up and powered separately, such as Fig.13 - Fig.14 As shown: The separation assembly 6 includes a mounting plate 61 fixedly mounted on the side wall of the outer shell 11, a gas cylinder 62 fixedly mounted on the mounting plate 61, a piston 63 slidably mounted inside the gas cylinder 62, a connecting rod 64 fixedly connected to the side wall of the piston 63, the distal end of the connecting rod 64 passes through the third slide groove 35 and is fixedly connected to the side wall of the slide seat 36, a one-way air outlet valve 65 is fixedly mounted on the side wall of the gas cylinder 62, a one-way air inlet valve 67 is also fixedly mounted on the side wall of the gas cylinder 62, a filter 66 is fixedly mounted on the one-way air inlet valve 67, and the filter 66 is connected to the outer shell 11 and the storage bin 7 through a pipeline 8 respectively.

[0041] Specifically, Figure 13-14 As shown, when the movable pulverizing mechanism 3 moves to the right, the slide 36 drives the piston 63 to slide inside the air cylinder 62 through the connecting rod 64, so that the chamber on the left side of the air cylinder 62 generates negative pressure. Since the diameters of the air cylinder 62 and the piston 63 are much larger than the diameter of the pipe 8, a huge suction force is generated inside the pipe 8. Under the action of the suction force, the fuel dust inside the feeding mechanism 1 is sucked into the filter 66 through the pipe 8 for filtration, and the filtered gas passes through the one-way air inlet valve 67 and enters the chamber on the left side of the air cylinder 62 for temporary storage, and the filtered fuel dust flows into the interior of the storage bin 7 through the pipe 8 for storage for subsequent combustion use. Figure 13-14 As shown, when the movable pulverizing mechanism 3 moves to the left, the piston 63 will discharge the gas temporarily stored in the left half of the chamber of the gas cylinder 62 into the external environment through the one-way air outlet valve 65. Since the movable pulverizing mechanism 3 moves back and forth left and right, the separation component 6 can intermittently suck out and filter the fuel dust inside the feeding mechanism 1, reducing the amount of fuel dust floating in the atmosphere, achieving an environmental protection effect, and the filtered fuel dust will enter the storage bin 7 through the pipeline 8 for storage, reducing fuel waste.

[0042] Usually, the mechanism for filtering fuel dust in the feeding device of a thermal power plant needs to be set up separately and powered separately. However, the separation component 6 for separating fuel dust in the present invention is also realized by the reciprocating movement of the movable crushing mechanism 3, and does not require an additional power device. While achieving the fuel dust filtering effect, it can also reduce the investment in equipment funds, which is also beneficial to controlling costs, reducing power consumption, and achieving energy saving and environmental protection.

[0043] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0044] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A feeding device for a thermal power plant, comprising a feeding mechanism (1) and a position-limiting crushing mechanism (2) arranged inside the feeding mechanism (1), characterized in that: The feeding mechanism (1) is also provided with a movable crushing mechanism (3) inside. A limited grinding mechanism (4) is fixedly provided on an inner wall on one side of the lower end of the feeding mechanism (1). A movable grinding mechanism (5) is slidably provided on an inner wall on the other side of the lower end of the feeding mechanism (1). The movable crushing mechanism (3) and the movable grinding mechanism (5) are fixedly connected. A separation component (6) is fixedly provided on the outer wall of the feeding mechanism (1). The air inlet end of the separation component (6) is connected to the inner cavity of the feeding mechanism (1) via a pipe (8). The separation component (6) and the movable crushing mechanism (3) are fixedly connected. A storage bin (7) is provided below the feeding mechanism (1). The separation component (6) and the storage bin (7) are connected via a pipe (8). A conveying device (9) is provided below the storage bin (7).

2. A feeding device for a thermal power plant according to claim 1, characterized in that: The feeding mechanism (1) comprises a shell (11), and through grooves (14) are symmetrically provided on the outer walls of both sides of the shell (11), and the opening edges outside the two through grooves (14) are connected to the expansion chamber (12) fixedly installed, and the movable crushing mechanism (3) can slide inside the through grooves (14) and the expansion chamber (12), and a first slide groove (13) is provided on the side wall of the inner cavity of the shell (11), and the movable grinding mechanism (5) is slidably installed on the first slide groove (13).

3. A feeding device for a thermal power plant according to claim 2, characterized in that: The position-limiting pulverizing mechanism (2) comprises a position-limiting roller (21) rotatably mounted thereon, a plurality of first crushing teeth (22) being fixedly mounted on the circumferential side wall of the position-limiting roller (21), a first motor (23) being fixedly mounted on the side wall of the housing (11), an output shaft of the first motor (23) being rotatably mounted through the side wall of the housing (11), and a fixed connection being formed between the output shaft of the first motor (23) and the position-limiting roller (21).

4. A feeding device for a thermal power plant according to claim 3, characterized in that: The movable crushing mechanism (3) comprises a movable roller (31) slidably mounted inside the through groove (14) and the expansion chamber (12); a plurality of second crushing teeth (32) are fixedly mounted on the circumferential side wall of the movable roller (31); a load-bearing plate (33) is fixedly mounted on the side wall of the housing (11); a second slide groove (34) is formed on the top surface of the load-bearing plate (33); a third slide groove (35) is formed on the side wall of the load-bearing plate (33); and a second slide groove (34) and a third slide groove (35) are formed between the second slide groove (34) and the third slide groove (35). A connecting arrangement is provided, a slide seat (36) is slidably installed in the inner cavity of the second slide groove (34), a second motor (37) is fixedly installed on the slide seat (36), an output shaft of the second motor (37) passes through and is fixedly installed at the middle axis of the movable roller (31), a pair of reciprocating hollow tubes (38) are fixedly sleeved on the output shaft of the second motor (37), a threaded sleeve (39) is fixedly installed on the top surface of the bearing plate (33), and the reciprocating hollow tube (38) and the threaded sleeve (39) are meshedly connected.

5. A feeding device for a thermal power plant according to claim 4, characterized in that: The first crushing teeth (22) and the second crushing teeth (32) are arranged in a staggered manner, and when the second crushing teeth (32) follow the movable rotating roller (31) to move back and forth left and right, they will not interfere with the normal operation of the first crushing teeth (22).

6. A feeding device for a thermal power plant according to claim 4, characterized in that: The reciprocating hollow tube (38) comprises a hollow sleeve (381) fixedly sleeved on the output shaft of the second motor (37), and a reciprocating thread (382) is arranged on the circumferential outer wall of the hollow sleeve (381).

7. A feeding device for a thermal power plant according to claim 6, characterized in that: The threaded sleeve (39) comprises a pair of brackets (391) fixedly mounted on the top surface of the load-bearing plate (33), a threaded sleeve body (392) being fixedly mounted on the two brackets (391), and a meshing connection is formed between the threaded sleeve body (392) and the reciprocating thread (382).

8. A feeding device for a thermal power plant according to claim 2, characterized in that: The position-limiting grinding mechanism (4) comprises a position-limiting guide plate (41) fixedly mounted on an inner wall of one side of the lower end of the housing (11), a plurality of first cutting knives (42) fixedly mounted on a side wall at an upper portion of a vertical surface of the position-limiting guide plate (41), and a first grinding plate (43) fixedly mounted on a side wall at a lower portion of the vertical surface of the position-limiting guide plate (41).

9. A feeding device for a thermal power plant according to claim 7, characterized in that: The movable grinding mechanism (5) comprises a movable guide plate (51), a clamping plate (53) is fixedly mounted on the outer side wall of the movable guide plate (51), the clamping plate (53) is embedded and slidably mounted inside the first slide groove (13), a plurality of second cutters (52) are fixedly mounted on the side wall of the upper part of the vertical surface of the movable guide plate (51), and the second cutters (52) and the first cutters (42) are staggered, a second grinding plate (54) is fixedly mounted on the side wall of the lower part of the vertical surface of the movable guide plate (51), and the movable guide plate (51) and the slide seat (36) are fixedly connected via an L-shaped connecting rod (55).

10. A feeding device for a thermal power plant according to claim 4, characterized in that: The separation assembly (6) comprises a mounting plate (61) fixedly mounted on the side wall of the housing (11), a gas cylinder (62) fixedly mounted on the mounting plate (61), a piston (63) slidably mounted inside the gas cylinder (62), a connecting rod (64) fixedly connected to the side wall of the piston (63), the distal end of the connecting rod (64) passes through a third slide groove (35) and is fixedly connected to the side wall of the slide seat (36), a one-way air outlet valve (65) is fixedly mounted on the side wall of the gas cylinder (62), a one-way air inlet valve (67) is also fixedly mounted on the side wall of the gas cylinder (62), a filter (66) is fixedly mounted on the one-way air inlet valve (67), and the filter (66) is connected to the housing (11) and the storage bin (7) through a pipeline (8) respectively.

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