A SCR step pulse reciprocating rake sootblower

Abstract

The present invention discloses an SCR step-by-step pulse reciprocating rake-type sootblowing device, comprising a placement box and an SCR step-by-step motor controller, the side of the placement box is connected with a limit block for sealing by bolts, the upper end of the limit block is provided with an oil inlet, the inner wall of the oil inlet is threadedly connected with a rubber plug for sealing, the inner wall of the limit block is plugged with a main pipe, and the lower end of the placement box is clamped with a rubber pad for sealing. The SCR step-by-step pulse reciprocating rake-type sootblowing device, through the coordinated arrangement of the limit block, the oil inlet and the rubber plug, can more conveniently limit the main pipe to ensure that its installation position is accurate and stable, and at the same time, when the main pipe is running, the inside of the limit block can also be oiled to lubricate the main pipe to avoid the problem of dryness and difficulty in sliding, and with the help of the coordinated arrangement of the cover and the rubber pad, it can play a sealing role to prevent the medium inside the device from leaking downward, and can also isolate the external dust.

Description

Technical Field

[0001] The invention relates to the technical field of rake-type sootblowing equipment, in particular to an SCR step-pulse reciprocating rake-type sootblowing device. Background Art

[0002] In many industrial fields, such as electricity, chemical industry, metallurgy and other industries, there are a large number of equipment that rely on burning fuel to generate heat or perform chemical reactions, such as boilers, heating furnaces, reactors, etc. During the operation of these equipment, the high-temperature flue gas generated by the combustion of fuel often carries a large amount of solid particles. When the flue gas flows on the heating surfaces inside the equipment, such as pipes, tube bundles, furnace walls, etc., the solid particles will gradually deposit on the heating surfaces due to temperature reduction, flow rate changes, etc., forming ash accumulation. Ash accumulation will bring many adverse effects. On the one hand, it will reduce the heat transfer efficiency of the heating surface, so that the equipment needs to consume more fuel to maintain the set production temperature, increasing energy consumption and production costs. On the other hand, excessive ash accumulation may cause local overheating of the heating surface, affecting the normal operation of the equipment, and even causing safety hazards, such as deformation and rupture of the pipeline. Therefore, timely and effective removal of ash accumulation on the heating surface is crucial to ensure the efficient and safe operation of industrial equipment, so a sootblower is needed.

[0003] The rake soot blower uses the impact force of the high-pressure airflow of compressed air or the high-speed jet of superheated steam to remove the dust deposited on the catalyst. Compared with the sonic soot blower that uses the energy of the sound field to remove dust, the rake soot blower has a greater soot blowing force. The rake soot blower is particularly suitable for the flue gas denitrification system SCR, fin tube economizer, tubular air preheater and other parts in power station boilers. These parts have serious dust accumulation problems due to their complex structures, and traditional soot blowers are difficult to achieve ideal cleaning effects. The rake soot blower can effectively remove the dust accumulation in these parts due to its unique working principle and structural characteristics. At the same time, the reciprocating motion of its rake structure, combined with the soot blowing medium sprayed by the nozzle, can perform large-area, multi-angle and multiple soot blowing operations on the heating surface. It can also have a better cleaning effect on the dust with strong viscosity and uneven distribution. Compared with some traditional soot blowing methods such as simple steam soot blowing, sonic soot blowing, etc., it can clean more thoroughly. It can deal with the ash accumulation on the heating surface and effectively restore the heat transfer efficiency of the heating surface. By reasonably designing the shape of the rake tube, the arrangement of the nozzles and the stroke of the reciprocating motion, it can achieve a relatively comprehensive coverage and soot blowing of heating surfaces of different shapes and sizes. Whether it is a large-area flat heating surface or a complex curved heating surface, targeted layout and parameter adjustment can be carried out according to the actual situation to ensure that there are no dead angles in soot blowing. Customized design and parameter adjustment can be carried out according to the equipment characteristics, ash accumulation type, environmental requirements, etc. in different industrial scenarios. For example, it can play a good soot blowing role in different equipment such as large boilers in the power industry, reactors in the chemical industry, and heating furnaces in the metallurgical industry. The rake soot blower plays an indispensable role in the ash cleaning work in the industrial field with its unique structure, efficient working principle and significant advantages, and has made important contributions to ensuring the efficient operation of various heat exchange equipment.

[0004] However, the existing technology has the following problems:

[0005] When the existing device has to perform reciprocating motion in the furnace, it is always in a high temperature environment for a long time, and the outer surface of the soot blowing pipe is abnormally dry. At the same time, the accumulated ash in the furnace can easily enter the moving track of the soot blowing pipe or contact the transmission mechanism, which can easily cause jamming and make the soot blowing pipe unable to move normally. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the present invention provides an SCR step-pulse reciprocating rake sootblower device, which has the advantages of strong sealing and stable reciprocating motion, and solves the problem that dust easily enters the interior of the mechanism and causes the equipment to become stuck.

[0008] (II) Technical solution

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an SCR step-pulse reciprocating rake-type sootblowing device, comprising a placement box and an SCR stepper motor controller, the side of the placement box is connected with a limit block for sealing by bolts, the upper end of the limit block is provided with an oil inlet, the inner wall of the oil inlet is threadedly connected with a rubber plug for sealing, the inner wall of the limit block is plugged with a main pipe, the lower end of the placement box is clamped with a rubber pad for sealing, the lower end of the rubber pad is clamped with a bottom cover, the upper surface of the bottom cover is connected to the lower surface of the placement box by bolts, and the inner wall of the placement box is connected with a load-bearing plate for limiting by bolts.

[0010] Preferably, one end of the main pipe is fixedly connected to a rake pipe, and the lower end of the rake pipe is fixedly connected to a nozzle.

[0011] Preferably, a slide groove is provided at the lower end of the load-bearing plate, and a transmission shaft is inserted into the inner wall of the slide groove.

[0012] Preferably, the side of the load-bearing plate is connected to a driving motor by bolts, the output end of the driving motor passes through one side of the load-bearing plate and is threadedly connected to the inner wall of the transmission shaft, and one end of the load-bearing plate is connected to a baffle for limiting by bolts.

[0013] Preferably, a slider for positioning is clamped on the inner wall of the slide groove, a connecting ring is fixedly connected to the lower end of the slider, and the inner wall of the connecting ring is detachably connected to the outer surface of the main pipe.

[0014] Preferably, a positioning ring is fixedly connected to the outer surface of the main pipe, and a threaded column for fixing is inserted into the side surface of the positioning ring.

[0015] Preferably, one end of the main pipe is threadedly connected to a hose for transmission, and one end of the hose is fixedly connected to a compressor.

[0016] Preferably, a display screen is provided on the side of the SCR stepper motor controller, and a control button is provided on the side of the SCR stepper motor controller.

[0017] Preferably, a clamping plate is fixedly connected to the side of the bottom cover, a pin for fastening is inserted into the side of the clamping plate, and the pin passes through one side of the bottom cover and is threadedly connected to the inside of the placement box.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the present invention provides an SCR step-pulse reciprocating rake sootblower, which has the following beneficial effects:

[0020] The SCR step-pulse reciprocating rake-type sootblower device can limit the main pipe more conveniently to ensure that its installation position is accurate and stable through the coordinated arrangement of the limit block, the oil inlet and the rubber plug. At the same time, when the main pipe is running, the inside of the limit block can be oiled to lubricate the main pipe to avoid the problem of dryness and difficulty in sliding. With the coordinated arrangement of the cover and the rubber pad, it can play a sealing role to prevent the medium inside the device from leaking downward, and can also isolate external dust to prevent it from entering the interior of the placement box, causing the transmission mechanism to dry and stick. At the same time, it can also buffer the force between the placement box and the bottom cover to a certain extent, protect the connection between the two, and extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention proposes a schematic structural diagram of an SCR step-pulse reciprocating rake-type sootblower device;

[0022] Figure 2 The present invention proposes a schematic structural diagram of an SCR step-pulse reciprocating rake-type sootblower device;

[0023] Figure 3 The present invention proposes a schematic structural diagram of an SCR step-pulse reciprocating rake-type sootblower device;

[0024] Figure 4 The present invention proposes a schematic structural diagram of an SCR step-pulse reciprocating rake-type sootblower device;

[0025] Figure 5 The present invention proposes a schematic structural diagram of an SCR step-pulse reciprocating rake-type sootblower device;

[0026] Figure 6 The present invention proposes a structural schematic diagram of an SCR step-pulse reciprocating rake-type sootblower device.

[0027] In the figure: 1. Placement box; 2. SCR stepper motor controller; 3. Limit block; 4. Oil inlet; 5. Rubber plug; 6. Main pipe; 7. Rubber pad; 8. Bottom cover; 9. Load-bearing plate; 10. Rake pipe; 11. Nozzle; 12. Slide; 13. Transmission shaft; 14. Drive motor; 15. Baffle; 16. Slider; 17. Connecting ring; 18. Positioning ring; 19. Threaded column; 20. Hose; 21. Compressor; 22. Display screen; 23. Control button; 24. Card plate; 25. Pin. DETAILED DESCRIPTION

[0028] 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.

[0029] See also Figure 1-6 , including a placement box 1 and an SCR stepper motor controller 2, a display screen 22 is provided on the side of the SCR stepper motor controller 2, a control button 23 is provided on the side of the SCR stepper motor controller 2, a limit block 3 for sealing is connected to the side of the placement box 1 by bolts, an oil inlet 4 is opened on the upper end of the limit block 3, a rubber plug 5 for sealing is threadedly connected to the inner wall of the oil inlet 4, a main pipe 6 is plugged into the inner wall of the limit block 3, one end of the main pipe 6 is fixedly connected to a rake pipe 10, the lower end of the rake pipe 10 is fixedly connected to a nozzle 11, one end of the main pipe 6 is threadedly connected to a hose 20 for transmission, and one end of the hose 20 is fixedly connected to a compressor 21;

[0030] With the help of the display screen 22, the operating parameters of the device can be displayed intuitively. At the same time, the control button 23 is used by the operator to realize the control functions of starting, stopping, and adjusting parameters of the device. At the same time, the compressor 21 provides the power source required for soot blowing for the entire soot blowing device, and compresses the gas and delivers it to the main pipe 6 through the hose 20. By dispersing and guiding the medium for soot blowing delivered from the main pipe 6 to each nozzle 11, the coverage of soot blowing is wider and more uniform, thereby improving the soot blowing effect and realizing the soot blowing function. With the help of the rubber plug 5, when oil injection is not required, dust, moisture and other impurities are prevented from entering the interior of the limit block 3 through the oil inlet 4, and the internal oil and the like are prevented from leaking out, so as to ensure that the internal environment of the device is relatively stable and clean. With the help of the limit block 3, when the staff installs the main pipe 6 into the furnace, it is more convenient to seal the holes drilled on the side of the furnace to reduce the heat loss in the furnace.

[0031] See also Figure 1-4 The lower end of the placement box 1 is clamped with a rubber pad 7 for sealing, and the lower end of the rubber pad 7 is clamped with a bottom cover 8. The side of the bottom cover 8 is fixedly connected with a clamping plate 24, and the side of the clamping plate 24 is inserted with a pin 25 for fastening. The pin 25 passes through one side of the bottom cover 8 and is threadedly connected to the inside of the placement box 1. The upper surface of the bottom cover 8 is connected to the lower surface of the placement box 1 by bolts. With the help of the matching arrangement of the clamping plate 24 and the pin 25, the bottom cover 8 is fastened to the placement box 1, and the firmness of the connection between the two is further enhanced to prevent the bottom cover 8 from loosening, thereby ensuring the stability and sealing of the overall structure of the device;

[0032] See also Figure 2-6The inner wall of the placement box 1 is connected with a load-bearing plate 9 for limiting position by bolts, a slide groove 12 is opened at the lower end of the load-bearing plate 9, a transmission shaft 13 is inserted into the inner wall of the slide groove 12, a driving motor 14 is connected to the side of the load-bearing plate 9 by bolts, an output end of the driving motor 14 passes through one side of the load-bearing plate 9 and is threadedly connected to the inner wall of the transmission shaft 13, one end of the load-bearing plate 9 is connected with a baffle 15 for limiting position by bolts, a slider 16 for positioning is clamped on the inner wall of the slide groove 12, a connecting ring 17 is fixedly connected to the lower end of the slider 16, the inner wall of the connecting ring 17 is detachably connected to the outer surface of the main pipe 6, a positioning ring 18 is fixedly connected to the outer surface of the main pipe 6, a threaded column 19 for fixing is inserted into the side of the positioning ring 18;

[0033] By setting the load-bearing plate 9 and the slide groove 12, the slider 16 can be clamped, so that the slider 16 can slide inside the slide groove 12 at the lower end of the load-bearing plate 9, and at the same time, the outer surface of the transmission shaft 13 is threadedly connected to the inner wall of the slider 16, so that the power generated by the drive motor 14 drives the transmission shaft 13 to rotate, and then the slider 16 and the connecting ring 17 fixedly connected at the lower end of the load-bearing plate 9 are reciprocated at the lower end of the load-bearing plate 9, and at the same time, the positioning ring 18 on the outer surface of the main pipe 6 is connected to the connecting ring 17 through the threaded column 19, so that the main pipe 6 is fixed. Inside the connecting ring 17, one end of the main pipe 6 is fixedly connected with a rake pipe 10 and a nozzle 11. Therefore, when the slider 16 moves, it can drive the rake pipe 10 and the nozzle 11 to do reciprocating motion, thereby achieving a good soot blowing effect. With the help of the setting of the SCR stepper motor controller 2, the step length, pulse frequency and amplitude and other parameters can be accurately set, thereby achieving more precise control of the drive motor 14, so that the rake pipe 10 and the nozzle 11 can move more accurately when doing reciprocating motion, and effectively avoid the adverse effects caused by control errors.

[0034] The electrical components mentioned in this article are all connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device for controlling a computer or the like.

[0035] In summary, when using the SCR step-by-step pulse reciprocating rake-type sootblowing device, the staff installs the limit block 3 in the hole on the side of the furnace, then places the main pipe 6 into the furnace, passes one end of the main pipe 6 through the side of the limit block 3, and connects it to the connecting ring 17. The operator uses the control button 23 on the side of the SCR stepper motor controller 2 according to the actual sootblowing needs, with the assistance of the display screen 22, to accurately set the step length, pulse frequency and amplitude and other parameters. These parameters will be used to accurately control the subsequent operating state of the drive motor 14, so that the moving distance of the rake-type pipe 10 and the nozzle 11 when performing reciprocating motion is more accurate, reducing the adverse effects of control errors, and starting the compressor 21 through the control button 23 on the SCR stepper motor controller 2. The compressor 21 starts working, sucks in and compresses the external gas, and then continuously transports the compressed gas to the main pipe 6 through the hose 20. The rake pipe 10 and the nozzle 11 are sent out, and the drive motor 14 is started at the same time. The drive motor 14 outputs power to drive the transmission shaft 13 to start rotating in the slide groove 12 at the lower end of the load-bearing plate 9. As the transmission shaft 13 rotates, the slider 16 that cooperates with it will reciprocate along the slide groove 12, and the connecting ring 17 fixedly connected to the lower end of the slider 16 will also reciprocate accordingly. Since the main pipe 6 is fixedly connected to the connecting ring 17 by a positioning ring 18, a threaded column 19, etc., the main pipe 6 and the rake pipe 10 and the nozzle 11 fixedly connected at one end thereof also reciprocate accordingly. When the soot blowing work is completed or the soot blowing needs to be suspended, the operator first turns off the compressor 21 through the control button 23 on the SCR stepper motor controller 2 to stop delivering compressed gas, and then turns off the drive motor 14 to stop the transmission shaft 13 from rotating, thereby stopping the moving parts of the entire device from moving, and the rake pipe 10 and the nozzle 11 no longer reciprocate, and the soot blowing operation is completed.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise one" do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0037] 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. An SCR step-pulse reciprocating rake-type sootblower, comprising a placement box (1) and an SCR step-motor controller (2), characterized in that: The side of the placement box (1) is connected to a limit block (3) for sealing by bolts, the upper end of the limit block (3) is provided with an oil inlet (4), the inner wall of the oil inlet (4) is threadedly connected to a rubber plug (5) for sealing, the inner wall of the limit block (3) is plugged with a main pipe (6), the lower end of the placement box (1) is clamped with a rubber pad (7) for sealing, the lower end of the rubber pad (7) is clamped with a bottom cover (8), the upper surface of the bottom cover (8) is connected to the lower surface of the placement box (1) by bolts, and the inner wall of the placement box (1) is connected to a load-bearing plate (9) for limiting by bolts.

2. The SCR step-pulse reciprocating rake sootblower according to claim 1, characterized in that: One end of the main pipe (6) is fixedly connected to a rake pipe (10), and the lower end of the rake pipe (10) is fixedly connected to a spray head (11).

3. The SCR step-pulse reciprocating rake sootblower according to claim 1, characterized in that: A slide groove (12) is provided at the lower end of the load-bearing plate (9), and a transmission shaft (13) is inserted into the inner wall of the slide groove (12).

4. The SCR step-pulse reciprocating rake sootblower according to claim 3, characterized in that: The side surface of the load-bearing plate (9) is connected to a driving motor (14) via bolts, the output end of the driving motor (14) passes through one side of the load-bearing plate (9) and is threadedly connected to the inner wall of the transmission shaft (13), and one end of the load-bearing plate (9) is connected to a baffle (15) for limiting position via bolts.

5. The SCR step-pulse reciprocating rake sootblower according to claim 3, characterized in that: The inner wall of the slide groove (12) is clamped with a slider (16) for positioning, the lower end of the slider (16) is fixedly connected with a connecting ring (17), and the inner wall of the connecting ring (17) is detachably connected to the outer surface of the main pipe (6).

6. The SCR step-pulse reciprocating rake sootblower according to claim 1, characterized in that: A positioning ring (18) is fixedly connected to the outer surface of the main pipe (6), and a threaded column (19) for fixing is inserted into the side surface of the positioning ring (18).

7. The SCR step-pulse reciprocating rake sootblower according to claim 1, characterized in that: One end of the main pipe (6) is threadedly connected to a hose (20) for transmission, and one end of the hose (20) is fixedly connected to a compressor (21).

8. The SCR step-pulse reciprocating rake sootblower according to claim 1, characterized in that: A display screen (22) is provided on the side of the SCR stepper motor controller (2), and a control button (23) is provided on the side of the SCR stepper motor controller (2).

9. The SCR step-pulse reciprocating rake sootblower according to claim 1, characterized in that: A clamping plate (24) is fixedly connected to the side of the bottom cover (8), and a pin (25) for fastening is inserted into the side of the clamping plate (24). The pin (25) passes through one side of the bottom cover (8) and is threadedly connected to the inside of the storage box (1).

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