Coal buildup prevention device for igcc power plant belt conveyors

Abstract

The present application relates to coal chemical equipment technical field, provide a kind of anti-coal accumulation device for IGCC power station belt conveyor, including material conveying mechanism, the material conveying mechanism includes rack and conveyor belt, the front and rear ends of the rack are equipped with driving drum, the top of the rack is equipped with multiple groups of material conveying roller, the lower end of the rack is equipped with return roller and tension adjusting roller;The upper side of the tension adjusting roller is equipped with material baffle to shield, and the two sides of the material baffle are equipped with scraper brush and the surface of the conveyor belt sliding contact, the two ends of the material baffle are connected with linear reciprocating mechanism;The diameter of the tension adjusting roller gradually increases from middle to both sides, and the tension adjusting roller is equipped with multiple support strips arranged around and spaced, so that the support strips have gaps.The present application can effectively avoid coal ash and coal slag accumulation at the tension adjusting roller to form a security risk, ensure the safe operation of equipment.

Description

Technical Field

[0001] This invention relates to the field of coal chemical equipment technology, and more specifically, to a coal accumulation prevention device for a belt conveyor in an IGCC power plant. Background Technology

[0002] IGCC (Integrated Gasification Combined Cycle) power generation system is an advanced power system that combines coal gasification technology with a highly efficient combined cycle. It consists of two main parts: the coal gasification and purification section and the gas-steam combined cycle power generation section. During operation, coal is continuously fed into the combustion chamber via a belt conveyor for energy conversion; the coal particle size used is less than 60mm.

[0003] The belt conveyors used in IGCC are equipped with tension adjustment devices to ensure sufficient initial tension on the conveyor belt, maintain friction between the belt and the rollers, and allow the belt to carry materials and circulate normally. Tensioning rollers are typically used to tension the belt horizontally or vertically. However, when using vertical tension adjustment, some coal dust or lumps fall onto the inner side of the belt during coal unloading and loading. This coal dust is then crushed by the drive rollers, causing some coal dust to adhere to the inner side of the belt. Furthermore, the vertical tensioning method creates a depression on the belt. Over time, coal dust gradually accumulates at the contact point between the tensioning roller and the belt, forming a dust accumulation dead zone. Excessive dust concentration combined with the high pressure between the tensioning roller and the belt can easily lead to spontaneous combustion of the belt if not promptly washed with water. The resulting open flame could cause a fire, posing a safety hazard. Summary of the Invention

[0004] The purpose of this invention is to provide a coal accumulation prevention device for belt conveyors in IGCC power plants, which can effectively prevent coal ash from accumulating between the tension drum and the belt, thus avoiding safety hazards.

[0005] The embodiments of the present invention are achieved through the following technical solution: a coal accumulation prevention device for a belt conveyor in an IGCC power plant, comprising a material conveying mechanism, the material conveying mechanism comprising a frame and a conveyor belt, drive rollers installed at both the front and rear ends of the frame, multiple sets of material conveying rollers provided above the frame, and return rollers and tension regulating rollers provided at the lower end of the frame; a baffle plate is provided on the upper side of the tension regulating roller for shielding, and scraper brushes are provided on both sides of the baffle plate to slide in contact with the surface of the conveyor belt, and linear reciprocating mechanisms are connected to both ends of the baffle plate; the diameter of the tension regulating roller gradually increases from the center to both sides, and multiple support bars arranged in a circumferential interval are provided on the tension regulating roller, so that there are gaps between the support bars.

[0006] Furthermore, the linear reciprocating mechanism includes a material support frame, a connecting rod, a spring, and a cam. The material support frame is suspended below the machine frame. The connecting rod is fixedly connected to the upper end of the baffle plate. One end of the connecting rod is fixed with a U-shaped groove plate. The cam is engaged with the U-shaped groove plate and rolls in contact with it. The other end of the connecting rod is provided with a flange. The material support frame is provided with a guide seat. The spring is sleeved on the connecting rod and is engaged between the flange and the guide seat.

[0007] Furthermore, it also includes an air guide pipe and an air pump for supplying air to it. The air guide pipe is connected from the side end face of the tension adjusting roller. Multiple air jets are arranged around the middle surface of the tension adjusting roller, and the air guide pipe communicates with the air jets.

[0008] Furthermore, the jet head corresponds to the gap between the two support bars, and the orientation of the jet head is the same as the axial direction of the tension adjusting roller.

[0009] Furthermore, the baffle plate is composed of two side plates hinged together, and a telescopic adjustment rod is provided between the two side plates, with both ends of the telescopic adjustment rod being hinged to the side plates respectively; a hydraulic lifting cylinder is connected to the upper end of the baffle plate.

[0010] Furthermore, pressure rods are hinged to both sides of the tension adjusting roller, and a driver is connected to the other end of the pressure rods. The driver drives the pressure rods to rotate and adjust the tension.

[0011] Furthermore, the length of the scraper brush is greater than the width of the conveyor belt.

[0012] Furthermore, a magnetic iron remover is suspended on the upper side of the conveyor belt.

[0013] The technical solution of this invention has at least the following advantages and beneficial effects: Compared with the prior art, this invention can block most of the coal slag by setting a baffle plate above the tension adjusting roller between the conveyor belts. In addition, during the movement of the conveyor belt, the scraper brush can scrape off the stubborn coal powder and coal slag adhering to the conveyor belt. With the help of the linear reciprocating mechanism, the baffle plate moves back and forth in a direction perpendicular to the conveyor belt, so that some of the scraped coal powder can fall to the ground for flushing. The tension adjusting roller is in close contact with the conveyor belt, and the conveyor belt is inclined from the center to both sides. The coal powder accumulated here will fall to the ground through the gaps between the support bars, thereby effectively avoiding the safety hazards caused by the accumulation of coal powder. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the anti-coal accumulation device for a belt conveyor in an IGCC power plant provided in an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the tension adjusting roller and linear reciprocating mechanism in this invention;

[0017] Figure 3 This is a partial structural schematic diagram of the baffle plate and linear reciprocating mechanism in this invention;

[0018] Figure 4 This is a partial structural diagram of the baffle plate and tension adjusting roller in this invention.

[0019] Icons: 10-Material conveying mechanism, 101-Frame, 102-Conveyor belt, 103-Drive roller, 104-Material conveying roller, 105-Return roller, 11-Tension adjusting roller, 111-Support bar, 112-Air jet head, 12-Baffle plate, 121-Side plate, 122-Scraper brush, 123-Telescopic adjusting rod, 13-Linear reciprocating mechanism, 131-Material support frame, 132-Connecting rod, 133-U-shaped trough plate, 134-Cam, 135-Flange, 136-Spring, 137-Guide seat, 14-Air pump, 15-Air guide pipe, 16-Hydraulic lifting cylinder, 17-Pressure rod, 18-Magnetic iron separator, 19-Driver. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] In the description of this invention, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0023] The following description, in conjunction with specific embodiments, provides further details. Figures 1-4 As shown, this embodiment is an anti-coal accumulation device for a belt conveyor in an IGCC power plant, including a material conveying mechanism 10. The material conveying mechanism 10 includes a frame 101 and a conveyor belt 102. Drive rollers 103 are installed at both the front and rear ends of the frame 101. Multiple sets of material conveying rollers 104 are provided above the frame 101, and return rollers 105 and tension regulating rollers 11 are provided at the lower end of the frame 101. A baffle plate 12 is provided on the upper side of the tension regulating roller 11 for shielding, and scraper brushes 122 are provided on both sides of the baffle plate 12 to slide in contact with the surface of the conveyor belt 102. Linear reciprocating mechanisms 13 are connected to both ends of the baffle plate 12. The diameter of the tension regulating roller 11 gradually increases from the center to both sides, and multiple support bars 111 are arranged in a circumferential interval on the tension regulating roller 11, so that there are gaps between the support bars 111. Specifically, during the use of this invention, a portion of coal dust or small particles will accumulate on the inner side of the conveyor belt 102 due to feeding or airborne coal dust or small particles. As the conveyor belt 102 moves, the coal, which contains a certain amount of moisture, is crushed by the drive roller 103. Some of the coal will stick to the conveyor belt 102. When the conveyor belt 102 moves to the recessed area between the tension regulating roller 11 and the conveyor belt 102, the baffle plate 12 can block most of the falling coal slag and coal dust from falling directly onto the tension roller. In addition, the scraper brush 122 will brush off the stubborn coal on the moving conveyor belt 102, and with the help of the linear reciprocating mechanism 13, it will be cleared to the ground on both sides of the conveyor belt 102 for subsequent water washing. Of course, some coal dust will still accumulate from the gap between the scraper brush 122 and the conveyor belt 102 to the lowest point where the tension regulating roller 11 and the conveyor belt 102 meet. However, the cylindrical tension regulating roller 11, which is small in the middle and large on both sides, is fully in contact with the conveyor belt 102, and the accumulated coal dust and coal slag can fall to the ground along the inclined surface, thereby avoiding the accumulation of coal dust and ensuring the safe operation of the equipment.

[0024] Reference Figure 2 and Figure 3As shown, the linear reciprocating mechanism 13 in this embodiment includes a material support frame 131, a connecting rod 132, a spring 136, and a cam 134. The material support frame 131 is suspended below the frame 101. The connecting rod 132 is fixedly connected to the upper end of the baffle plate 12. One end of the connecting rod 132 is fixed with a U-shaped groove plate 133, and the cam 134 is engaged with the U-shaped groove plate 133 and rolls in contact with it. The other end of the connecting rod 132 is provided with a flange 135. The material support frame 131 is provided with a guide seat 137. The spring 136 is sleeved on the connecting rod 132 and springs... Spring 136 is engaged between flange 135 and guide seat 137; specifically, connecting rod 132 is perpendicular to the moving direction of conveyor belt 102, and cam 134 is driven by motor to rotate continuously, so that cam 134 moves back and forth against connecting rod 132 and baffle plate 12 via U-shaped groove plate 133. Scraper brush 122 on baffle plate 12 can clean coal slag on conveyor belt 102. Spring 136 is squeezed between flange 135 and guide seat 137, so that cam 134 can always be in contact with U-shaped groove plate 133.

[0025] Reference Figure 2 and Figure 4 As shown, this embodiment also includes an air guide pipe 15 and an air pump 14 for supplying air to it. The air guide pipe 15 is connected from the side end face of the tension adjusting roller 11. Multiple jet nozzles 112 are arranged around the middle surface of the tension adjusting roller 11, and the air guide pipe 15 communicates with the jet nozzles 112. The jet nozzles 112 correspond to the gap between the two support bars 111, and the orientation of the jet nozzles 112 is the same as the axial direction of the tension adjusting roller 11. Specifically, most of the remaining coal dust will be in the gap between the conveyor belt 102 and the support bars 111. Based on the above, jet nozzles 112 are added in groups and arranged back to back. With the air pump 14 outputting air at a certain pressure, the jet nozzles 112 can effectively act on the gap between the support bars 111, and can blow air from the middle of the conveyor belt 102 to both sides, thereby cleaning up the remaining coal dust.

[0026] In this embodiment, the baffle plate 12 is composed of two side plates 121 hinged together, and a telescopic adjustment rod 123 is provided between the two side plates 121. The two ends of the telescopic adjustment rod 123 are respectively hinged to the side plates 121. A hydraulic lifting cylinder 16 is connected to the upper end of the baffle plate 12. Specifically, the conveyor belt 102 has adjustable tension. Therefore, after the position of the tension adjusting roller 11 changes, the opening angle of the baffle plate 12 can be adjusted by the telescopic adjustment rod 123 to ensure that the scraper brushes 122 on both sides can contact the conveyor belt 102. Furthermore, the hydraulic lifting cylinder 16 can drive the baffle plate 12 and the linear reciprocating mechanism 13 to adjust their positions up and down.

[0027] In this embodiment, pressure rods 17 are hinged to both sides of the tension adjusting roller 11, and the other end of the pressure rod 17 is connected to a driver 19. The driver 19 drives the pressure rod 17 to rotate and adjust the tension. Specifically, the driver 19 drives the pressure rod 17 to rotate, so that the driver 19 stops locking after the tension adjusting roller 11 reaches different positions, and the pressure on the conveyor belt 102 is different. This is the prior art, so it will not be described in detail.

[0028] In this embodiment, the length of the scraper brush 122 is greater than the width of the conveyor belt 102. Specifically, in order to ensure that there is no dead angle between the scraper brush 122 and the conveyor belt 102 when the scraper brush 122 moves back and forth to clean the coal powder, the travel distance of the scraper brush 122 plus the width of the conveyor belt 102 needs to be greater than the length of the scraper brush 122.

[0029] In addition, refer to Figure 1 As shown, a magnetic iron remover 18 is suspended on the upper side of the conveyor belt 102. Since the coal being transported to the combustion chamber may contain iron wires or iron rods, the magnetic iron remover 18 is installed to remove iron impurities from the coal. The distance between the magnetic iron remover 18 and the upper surface of the conveyor belt 102 can be adjusted according to usage.

[0030] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A coal accumulation prevention device for a belt conveyor in an IGCC power plant, comprising a material conveying mechanism (10), wherein the material conveying mechanism (10) includes a frame (101) and a conveyor belt (102), characterized in that: The front and rear ends of the frame (101) are equipped with drive rollers (103), the upper part of the frame (101) is provided with multiple sets of material conveying rollers (104), and the lower end of the frame (101) is provided with return rollers (105) and tension adjusting rollers (11). The tension adjusting roller (11) is provided with a baffle plate (12) on its upper side for shielding, and both sides of the baffle plate (12) are provided with scraper brushes (122) that slide in contact with the surface of the conveyor belt (102). The two ends of the baffle plate (12) are connected to a linear reciprocating mechanism (13). The diameter of the tension adjusting roller (11) gradually increases from the center to both sides, and the tension adjusting roller (11) is provided with a plurality of support bars (111) arranged in a circumferential interval, so that there are gaps between the support bars (111). The baffle plate (12) is composed of two side plates (121) hinged together, and a telescopic adjustment rod (123) is provided between the two side plates (121), and the two ends of the telescopic adjustment rod (123) are respectively hinged to the side plates (121); A hydraulic lifting cylinder (16) is connected to the upper end of the baffle plate (12).

2. The anti-coal-accumulation device for belt conveyors in IGCC power plants according to claim 1, characterized in that: The linear reciprocating mechanism (13) includes a material support frame (131), a connecting rod (132), a spring (136), and a cam (134). The material support frame (131) is suspended below the frame (101). The connecting rod (132) is fixedly connected to the upper end of the baffle plate (12). One end of the connecting rod (132) is fixed with a U-shaped groove plate (133). The cam (134) is inserted into the U-shaped groove plate (133) and rolls in contact with it. The other end of the connecting rod (132) is provided with a flange (135). The material support frame (131) is provided with a guide seat (137). The spring (136) is sleeved on the connecting rod (132) and is engaged between the flange (135) and the guide seat (137).

3. The anti-coal-accumulation device for belt conveyors in IGCC power plants according to claim 1, characterized in that: It also includes an air guide pipe (15) and an air pump (14) for supplying air to it. The air guide pipe (15) is connected from the side end face of the tension adjusting roller (11). A plurality of jet heads (112) are arranged around the middle surface of the tension adjusting roller (11). The air guide pipe (15) communicates with the jet heads (112).

4. The anti-coal-accumulation device for the belt conveyor of the IGCC power plant according to claim 3, characterized in that: The jet head (112) corresponds to the gap between the two support bars (111), and the orientation of the jet head (112) is the same as the axial direction of the tension adjusting roller (11).

5. The anti-coal-accumulation device for a belt conveyor in an IGCC power plant according to claim 1, characterized in that: The tension adjusting roller (11) is hinged with pressure rods (17) on both sides. The other end of the pressure rods (17) is connected to a driver (19). The driver (19) drives the pressure rods (17) to rotate and adjust the tension.

6. The anti-coal-accumulation device for a belt conveyor in an IGCC power plant according to any one of claims 1-5, characterized in that: The length of the scraper brush (122) is greater than the width of the conveyor belt (102).

7. The anti-coal-accumulation device for a belt conveyor in an IGCC power plant according to claim 1, characterized in that: A magnetic iron remover (18) is suspended on the upper side of the conveyor belt (102).

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