Soot blowing device for turnabout drum of steel belt machine

Abstract

The invention relates to the technical field of soot blowing of steel belt machines, and particularly discloses a turnabout drum soot blowing device of a steel belt machine, which comprises a steel belt machine body used for receiving boiler coal cinder; the purging element is located in the steel belt machine body; the purging element is installed at the position of an anti-deviation element pore plate at the tail of the steel belt machine body, and the purging element is located at the position, with the preset distance, of the lower portion of a steel belt operation layer; wherein the two sides of the purging element penetrate through the steel belt machine body, extend to the outside and are connected with a compressed air supply pipeline. The steel belt machine body is provided with a bearing section and a return section, the bearing section is used for bearing coal cinder falling from a boiler, fine ash deposition can be effectively removed through accurate purging of the purging element on a steel belt of the return section, and the situation that the fine ash deposition is squeezed and clamped when the fine ash deposition runs to a turnabout drum along with the steel belt is avoided; the problems that abrasion of the turnabout drum and the steel belt silk screen is aggravated, and the rotating radius is uneven are solved fundamentally, and the service life of equipment is remarkably prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel belt machine soot blowing, and particularly to a steel belt machine reversing roller soot blowing device. BACKGROUND

[0002] In the field of thermal power generation, the boiler slag removal system is a key component to ensure the stable operation of the unit, mainly divided into wet slag removal and dry slag removal, and the corresponding core conveying equipment is the slag conveyor and the steel belt machine respectively. Among them, the dry slag removal system is widely used due to its energy saving and environmental protection advantages, but the core equipment of the steel belt machine is prone to a series of problems caused by accumulated dust during long-term operation, which becomes a prominent hidden danger affecting the reliability of the system.

[0003] Specifically, the steel belt bearing plate of the steel belt machine will gradually increase the gap due to wear during long-term operation, so that the fine dust transported by the running layer is easily dropped to the steel belt return section through these gaps and the edge of the steel belt. With the accumulation of running time, the falling dust in the return section will continue to accumulate, and when the steel belt runs to the tail reversing roller, it will be squeezed between the steel belt mesh and the reversing roller. This phenomenon will directly aggravate the wear of the reversing roller and the steel belt mesh, significantly shorten the service life of the equipment; more seriously, the squeezed falling dust will cause the actual rotating radius of the reversing roller to be uneven, thereby causing the steel belt to deviate, causing the end plate of the steel belt bearing plate to be squeezed and deformed with the limiting wheel, and bringing significant risks to the safe operation of the steel belt.

[0004] In addition, the falling dust is usually concentrated in the middle part of the return steel belt, and long-term accumulation will cause the middle area of the steel belt to deform and bulge, further worsening the running state of the steel belt and increasing the difficulty and frequency of equipment maintenance. SUMMARY

[0005] Therefore, the technical problem to be solved by the present application is that the squeezed falling dust will cause the actual rotating radius of the reversing roller to be uneven, thereby causing the steel belt to deviate.

[0006] The above technical problem is solved by the following technical scheme: the present application provides a steel belt machine reversing roller soot blowing device, which comprises a steel belt machine body for receiving boiler coal ash;

[0007] a blowing element located inside the steel belt machine body; and

[0008] a deviation prevention element, the blowing element is installed at the deviation prevention element hole plate at the tail of the steel belt machine body, and the blowing element is located at a preset distance below the steel belt running layer;

[0009] Wherein the two sides of the blowing element extend to the outside through the steel belt machine body and are connected with the compressed air supply pipeline.

[0010] In a preferred mode of the steel belt machine redirection roller soot blowing device: the steel belt machine body has a receiving section and a return section, wherein the receiving section is used to receive the coal cinder falling from the boiler, and the return section is the return section after the coal cinder is transported to the designated position.

[0011] In a preferred mode of the steel belt machine redirection roller soot blowing device: the blowing element includes a main pipe pipeline arranged inside the steel belt machine body, and the axial ends of the main pipe pipeline are connected with the supply pipeline, and the side wall of the supply pipeline is provided with a control valve.

[0012] In a preferred mode of the steel belt machine redirection roller soot blowing device: the material of the main pipe pipeline is 316 stainless steel, and the supply pipeline is used to transport the compressed gas in the furnace side miscellaneous compressed air pipeline into the main pipe pipeline.

[0013] In a preferred mode of the steel belt machine redirection roller soot blowing device: the axial linear surface of the main pipe pipeline is provided with a plurality of openings, and a sub-pipe is welded at the position of each opening, and the material of the sub-pipe is 316 stainless steel.

[0014] In a preferred mode of the steel belt machine redirection roller soot blowing device: one end of the sub-pipe is welded with the main pipe pipeline, and the other end of the sub-pipe is provided with an external thread connected with the blowing head through a screw thread.

[0015] In a preferred mode of the steel belt machine redirection roller soot blowing device: the blowing head at both ends of the main pipe pipeline is arranged at an inclination of 15-45 degrees, and the blowing head at the middle position of the main pipe pipeline is arranged at an inclination of 45 degrees away from the roller.

[0016] In a preferred mode of the steel belt machine redirection roller soot blowing device: the blowing head is arranged in four sections, which are a section, a section, a section and a section, wherein the section is flat, and the diameters of the a section and the c section gradually decrease towards the d section.

[0017] In a preferred mode of the steel belt machine redirection roller soot blowing device: the anti-deviation element includes a housing arranged on the side wall of the steel belt machine body, and a limiting gear is arranged in the housing, and the tooth block of the limiting gear is inserted into the end of the steel belt.

[0018] In a preferred mode of the steel belt machine redirection roller soot blowing device: the limiting gear is sleeved on the side wall of the fixed bearing, and the fixed bearing is connected with the housing, and the movement of the steel belt in the steel belt machine body drives the limiting gear to rotate.

[0019] The beneficial effects of the present application are that: through the accurate blowing of the return section steel belt by the blowing element, fine dust accumulation can be effectively removed, avoiding the formation of extrusion and clamping when the steel belt runs to the redirection cylinder, solving the problems of the wear of the redirection cylinder and the uneven radius of rotation from the root, significantly prolonging the service life of the equipment. Eliminate the hidden danger of steel belt deviation caused by dust accumulation, avoid the extrusion deformation of the end plate of the steel belt carrier plate and the limiting wheel, and prevent the bulging deformation of the middle part of the return steel belt due to long-term dust accumulation, ensuring the stability of the steel belt running form. Reduce the abnormal shutdown of the steel belt machine caused by dust accumulation, reduce the safety risk of maintenance personnel entering the steel belt box for repair during operation, reduce the fault operation and adjustment workload of the operation personnel, and improve the safety and stability of the overall equipment operation. Through continuous and effective blowing, the maintenance frequency and difficulty of the equipment are reduced, the downtime caused by maintenance is reduced, and the operation efficiency of the thermal power generator set is indirectly improved. The angle, pressure and anti-deviation element of the blowing element are cooperatively designed to accurately adapt to the operation condition of the steel belt machine, ensure the blowing effect, and not affect the normal operation of the equipment, and have strong practicality. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application, and are not a limitation on the present application. Among them:

[0021] Figure 1 The overall structure schematic diagram of the steel belt machine redirection cylinder soot blowing device is shown;

[0022] Figure 2 The position structure schematic diagram between the blowing device and the steel belt machine body of the steel belt machine redirection cylinder soot blowing device is shown;

[0023] Figure 3 The blowing element schematic diagram of the steel belt machine redirection cylinder soot blowing device is shown;

[0024] Figure 4 The blowing head cross-sectional structure schematic diagram of the steel belt machine redirection cylinder soot blowing device is shown;

[0025] Figure 5 The side view of the blowing element of the steel belt machine redirection cylinder soot blowing device is shown;

[0026] Figure 6 The front view of the blowing element of the steel belt machine redirection cylinder soot blowing device is shown;

[0027] Figure 7 The anti-deviation element structure schematic diagram of the steel belt machine redirection cylinder soot blowing device is shown;

[0028] Figure 8 The limiting gear and steel belt connection structure schematic diagram of the steel belt machine redirection cylinder soot blowing device is shown. DETAILED DESCRIPTION

[0029] For a better understanding of the present application, the same will be described in further detail in connection with the preferred embodiment thereof, which is illustrated in the following drawings.

[0030] The terms used in the present application are those general terms currently widely used in the art in consideration of functions in the present application, but the terms can vary according to the intention of those of ordinary skill in the art, precedents, or new technology in the art. Also, specific terms can be selected by the applicant, and in this case, the detailed meaning thereof will be described in the detailed description of the application. Therefore, the terms used in the specification should be understood not simply as the names of the terms but based on the meaning of the terms and the overall description of the application.

[0031] Reference Figures 1-2 The embodiment provides a steel belt machine redirecting roller soot blowing device, including a steel belt machine body, a blowing element and a deviation prevention element, the blowing element is connected to compressed air, and is used for cleaning accumulated dust of a return stroke section, and the device structure is clear.

[0032] The steel belt machine body 1 is a basic bearing structure of the entire device, the main body is welded from high-strength steel, the surface is subjected to corrosion prevention treatment to adapt to the high-temperature and dusty working environment around the boiler, and the main function is to receive and transport coal cinder generated after boiler combustion, and ensure that the coal cinder can move along a preset path;

[0033] The blowing element 2 is a key execution component for realizing the soot blowing function, is arranged inside the steel belt machine body 1 close to the tail redirecting roller, and can directly act on the surface of the steel belt; and

[0034] The deviation prevention element 3 is used for limiting and guiding the running track of the steel belt, the blowing element 2 is fixedly installed at the hole plate position of the deviation prevention element 3 at the tail of the steel belt machine body 1 through bolts, and is accurately positioned, so that the blowing element 2 is located at a preset distance of 100 mm below the steel belt running layer, to ensure that the blowing air flow can vertically act on the surface of the steel belt;

[0035] The left and right sides of the blowing element 2 extend to the outside through the mounting holes pre-set in the side walls of the steel belt machine body 1, and are sealingly connected with the compressed air supply pipeline in the factory through a flange joint, to ensure that the compressed air can be stably transported to the blowing element 2.

[0036] The main body 1 of the steel belt conveyor has a receiving section 11 and a return section 12. The receiving section 11 is used to receive the coal slag falling from the boiler, while the return section 12 is the return section after the coal slag has been transported to a designated location. The main body 1 of the steel belt conveyor is divided into two main parts, the receiving section 11 and the return section 12, according to different operating functions. The receiving section 11 is located in the upper area of ​​the equipment, and its steel belt surface is horizontal and slightly inclined. It is used to directly receive the high-temperature coal slag falling from the bottom of the boiler furnace and transport the coal slag to a designated direction by the continuous operation of the steel belt. The return section 12 is located in the lower area of ​​the equipment. It is the return section where the empty steel belt returns to the initial position after the steel belt has transported the coal slag to a designated location such as the slag bin at the end. The surface of the steel belt in this section is prone to ash accumulation due to the falling of fine ash.

[0037] Reference Figures 2-4 As an optional embodiment, the core component of the purging element 2 includes a main pipe 21 horizontally arranged inside the steel strip machine body 1. The main pipe 21 is arranged along the width direction of the steel strip, and its two ends extend horizontally through the side wall of the steel strip machine body 1 to achieve a sealed connection with the external supply pipe 22. At the same time, a control valve 23 for adjusting the compressed air flow and on / off state is also provided on the side wall of the supply pipe 22.

[0038] The main pipe 21 is made of 316 stainless steel, which has excellent corrosion resistance and high temperature resistance, and can adapt to the complex working environment inside the steel belt conveyor. The main function of the supply pipe 22 connected to the main pipe 21 is to serve as a gas delivery channel, stably delivering compressed gas with a certain pressure from the furnace-side miscellaneous compressed air pipeline to the inside of the main pipe 21, providing a power source for the purging operation.

[0039] To achieve uniform blowing on the surface of the steel strip, several openings for distributing compressed air are made at preset intervals on the axial straight surface of the main pipe 21. Each opening is fixedly connected to a secondary pipe 24 by welding. The secondary pipe 24 is also made of 316 stainless steel to ensure that it has the same corrosion resistance and high temperature resistance as the main pipe 21, thus ensuring the stability of the overall structure.

[0040] One end of the secondary pipe 24 is welded to the opening on the main pipe 21 to achieve a firm and sealed connection, allowing compressed air in the main pipe 21 to smoothly enter the secondary pipe 24; the other end of the secondary pipe 24 has an external thread structure processed on its outer wall, which cooperates with the matching thread 25 to achieve a detachable connection with the blow head 26, facilitating the installation, replacement and maintenance of the blow head 26.

[0041] Reference Figures 3-6In one embodiment provided in this application, in order to achieve precise purging of different areas of the steel strip, the blowers 26 located at both ends of the main pipe 21 are designed to be installed at an inclination angle of 15-45 degrees. The blowers 26 are designed to be circular. This angle range can be flexibly adjusted according to the actual dust accumulation distribution to cover the dust accumulation in the edge area of ​​the steel strip. The blowers 26 in the middle of the main pipe 21 are uniformly set at an inclination angle of 45 degrees away from the redirecting roller, which can effectively blow the dust accumulation in the middle area away from the roller direction and prevent the dust accumulation from being carried into the contact area between the roller and the steel strip.

[0042] The blower head 26 adopts a four-section structure design, which is divided into section a, section b, section c and section d from the end connected to the thread 25 to the blow outlet end. Among them, the d section at the front end is a flat structure, which can make the blow airflow form a fan-shaped diffusion surface and increase the blow coverage area.

[0043] The diameters of sections a and c gradually decrease along the airflow direction (i.e. towards section d), while section b is constricted. Section a gradually narrows towards section b, section b gradually expands towards section c, and section c gradually narrows towards section d, with section d becoming flat. This variable diameter design can gradually increase the airflow speed, enhance the purging force, and ensure the removal effect on stubborn dust.

[0044] Reference Figures 1-2 and Figures 7-8 In some embodiments, the anti-deviation element 3 consists of a housing 31 fixedly installed on both sides of the steel belt machine body 1. The housing 31 is a hollow protective structure with a limiting gear 32 rotatably installed inside. The teeth of the limiting gear 32 match the edge structure of the steel belt end, and the tooth block is precisely inserted into the preset tooth groove or edge gap of the steel belt end, thereby constraining the lateral displacement of the steel belt.

[0045] The limiting gear 32 is sleeved on the outer wall of the fixed bearing 33 through the central hole. The two ends of the fixed bearing 33 are fixedly connected to the inner wall of the housing 31, so that the limiting gear 32 can rotate flexibly around the fixed bearing 33. When the steel belt in the steel belt machine body 1 moves in a cycle under the drive of the drive device, the end of the steel belt meshes with the tooth block of the limiting gear 32, thereby driving the limiting gear 32 to rotate synchronously. Without affecting the normal operation of the steel belt, the left and right deviation of the steel belt is limited by the cooperation between the gear and the steel belt, so as to achieve the function of preventing deviation.

[0046] It should be noted that the receiving section 11 of the steel belt conveyor body 1 receives the coal slag falling from the boiler and transports it to the designated location. After the transport is completed, the steel belt enters the return section 12 for return. During this return process, the purging element 2 is connected to the furnace-side miscellaneous compressed air through the supply pipe 22. The compressed air is transported through the supply pipe 22 to the main pipe 21 located inside the steel belt conveyor body 1. The main pipe 21 distributes the compressed air to each welded auxiliary pipe 24 through axially opened holes, and then sprays it out through the blower head 26 connected by thread 25 to purge the ash accumulated on the surface of the steel belt in the return section 12.

[0047] The blower head 26 in the middle of the main pipe 21 is inclined at 45 degrees away from the roller, while the blowers head 26 at both ends are inclined at 15-45 degrees. This allows the ash to be moved away from the redirecting roller and fully agitated to form fly ash. At the same time, the four-section structure of the blower head 26 (the diameters of sections a, b, and c gradually decrease towards the flat section d) enhances the concentration of the purging airflow. Combined with the negative pressure in the furnace, the agitated fly ash is sucked into the furnace, preventing ash accumulation from being carried by the steel belt to the redirecting roller. In addition, the anti-deviation element 3 engages with the end of the steel belt through the limiting gear 32 inside the housing 31. When the steel belt moves, it drives the limiting gear 32 to rotate around the fixed bearing 33, forming a limiting guide for the steel belt, further assisting in preventing the steel belt from deviating and ensuring the stable operation of the steel belt conveyor.

[0048] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A deflector roller dust blowing device for a steel belt conveyor, characterized in that: include, The steel belt conveyor body (1) is used to receive boiler slag; A purging element (2), said purging element (2) being located inside the steel belt conveyor body (1); and Anti-deviation element (3), the blowing element (2) is installed at the anti-deviation element (3) hole plate at the tail of the steel belt machine body (1), and the blowing element (2) is located at a preset distance below the steel belt running layer; The two sides of the purging element (2) extend through the steel belt conveyor body (1) to the outside and are connected to the compressed air supply line.

2. The steel belt conveyor redirecting drum soot blowing device according to claim 1, characterized in that: The main body (1) of the steel belt conveyor has a receiving section (11) and a return section (12), wherein the receiving section (11) is used to receive the coal slag falling from the boiler, and the return section (12) is the return section after the coal slag is transported to a designated location.

3. The steel belt conveyor redirecting drum soot blowing device according to claim 2, characterized in that: The purging element (2) includes a main pipe (21) disposed inside the steel belt machine body (1), and the two ends of the main pipe (21) extend axially and are connected to the supply pipe (22), and the side wall of the supply pipe (22) is provided with a control valve (23).

4. The steel belt conveyor redirecting drum soot blowing device according to claim 3, characterized in that: The main pipe (21) is made of 316 stainless steel, wherein the supply pipe (22) is used to transport compressed gas from the furnace-side miscellaneous compressed air pipe to the main pipe (21).

5. The steel belt conveyor redirecting drum soot blowing device according to claim 4, characterized in that: The main pipe (21) has several openings on its axial straight surface, and a secondary pipe (24) is welded to each of the openings. The secondary pipe (24) is made of 316 stainless steel.

6. The steel belt conveyor redirecting drum soot blowing device according to claim 5, characterized in that: One end of the secondary pipe (24) is welded to the main pipe (21), and the other end of the secondary pipe (24) is provided with an external thread that is connected to the blower (26) through a threaded connection (25).

7. The steel belt conveyor redirecting drum soot blowing device according to claim 6, characterized in that: The blowers (26) located at both ends of the main pipe (21) are inclined at 15-45 degrees, while the blower (26) in the middle of the main pipe (21) is inclined at 45 degrees away from the roller.

8. The steel belt conveyor redirecting drum soot blowing device according to claim 7, characterized in that: The blow nozzle (26) is arranged in four sections, namely section a, section b, section c and section d, wherein section d is flat, and the diameters of sections a and c gradually decrease towards section d.

9. The steel belt conveyor redirecting drum soot blowing device according to claim 8, characterized in that: The anti-deviation element (3) includes a housing (31) disposed on the side wall of the steel belt machine body (1), and a limiting gear (32) is disposed inside the housing (31), with the teeth of the limiting gear (32) inserted into the end of the steel belt.

10. The steel belt conveyor redirecting drum soot blowing device according to claim 9, characterized in that: The limiting gear (32) is sleeved on the side wall of the fixed bearing (33) and connected to the housing (31) through the fixed bearing (33). The movement of the steel belt in the steel belt machine body (1) will drive the limiting gear (32) to rotate.

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