A high temperature resistant thermal power plant boiler soot blower

Abstract

The present invention relates to a soot blower for a high-temperature resistant thermal power plant boiler, comprising a frame, a central axis, a crane, a first drive device, an air jet pipe, a second drive device and compressed air, wherein the air jet pipe rotates around the central axis and can slide along the central axis; an air intake assembly is provided at one end of the air jet pipe close to the crane; the air intake assembly comprises an air intake sleeve, an air intake hole, an air intake valve, an air intake ring groove, an air intake groove, a connecting hole and an air outlet hole; the beneficial effect of the present invention is that the crane drives the air jet pipe to enter the interior of the boiler, and the air jet pipe rotates and slides to sweep the soot, thereby cleaning it thoroughly; through the air intake assembly, compressed air enters the air intake hole from the air intake valve, flows into the air intake ring groove from the air intake hole, passes through the air intake ring groove and the connecting hole into the air intake groove, and finally blows soot through the air outlet hole.

Description

Technical Field

[0001] The invention relates to the technical field of cleaning fallen dust, in particular to a high-temperature resistant soot blower for a boiler in a thermal power plant. Background Art

[0002] Boiler soot blowers are increasingly used in various industries. They are mainly used in boilers.

[0003] During the production and operation of the boiler, dust and slagging on the heating surfaces of the boiler, such as the water-cooled walls, superheaters, economizers, preheaters and flues, has long been a problem that has been difficult to solve. It not only weakens the heat transfer of the boiler's heating surface, resulting in a decrease in the boiler's thermal efficiency and a reduction in production load, but also, when the dust and slagging on the heating surface are serious, it may lead to unexpected shutdowns and cause significant economic losses. At present, most boilers are equipped with steam soot blowers, compressed air soot blowers, steel ball soot blowers, etc. However, these traditional soot blowers have disadvantages in operation and performance, such as limited soot blowing range, dead angles, high energy consumption, high maintenance costs, inconvenient operation, and side effects. The utilization rate is very low, and most of them are idle. Therefore, new technologies must be sought to remove dust from the boiler's heating surface and prevent slagging. In the 1970s, the low-frequency acoustic wave soot cleaning technology first discovered and used in boilers by Swedes opened up a new way for boiler soot cleaning, has been widely used, and achieved good results.

[0004] Sonic soot blower refers to a method of using the energy of the sound field to remove soot from the heating surface of the boiler. It is completely different from other soot cleaning technologies. The WSB series boiler soot blower technology converts compressed air (or steam) into high-power sound waves (a pressure wave that propagates in a spatial medium (gas) in the form of a density wave) and sends it into the furnace. When the soot on the heating surface is repeatedly pulled and compressed by the density waves that alternate at a certain frequency, it becomes loose due to fatigue and falls off, carried away with the flue gas flow, or sinks to the ash hopper under the action of gravity and is discharged. Generally, sonic soot blowers are installed on the outer wall of the boiler and blow soot at a fixed position. There is a problem that the soot is blown cleanly in places that are close to the boiler, but not in places that are far away, so this needs to be solved.

[0005] Among the existing Chinese patents, the patent with application number CN201910061319.8, entitled Sootblower Operation Control Device, Sootblower Operation Control Method and Combustion System, discloses providing a sootblower operation control device that can operate the sootblower device more appropriately. The sootblower operation control device controls the operation of the sootblower device, which is used to remove attachments attached to the surface of the evaporator tube provided inside the combustion furnace for generating steam. The sootblower operation control device comprises: a cooling index value acquisition unit, which is configured to acquire a cooling index value, which indicates the amount of cooling when the steam heated by the heat exchanger provided on the downstream side of the sootblower device inside the combustion furnace is cooled by the temperature reducer; and an operation control unit, which is configured to perform operation control of the sootblower device based on the cooling index value; the patent does not disclose the specific structure of the sootblower, and it is unknown how to blow soot, which needs to be improved;

[0006] There is also a patent with application number CN202022802801.3, named soot blower control circuit, soot blower and boiler, which discloses: the first branch: the forward contactor, the reverse contactor first position contacts and the soot blower forward limit switch, the forward contactor first position contact are connected in series in sequence; the second branch: the reverse contactor and the forward contactor second position contact are connected in series; after the first branch and the second branch are connected in parallel, they are respectively connected to the phase line end of the secondary circuit power supply and the neutral line end of the secondary circuit power supply; one end of the reverse position intermediate relay is connected between the soot blower reverse limit switch and the second branch, and the other end is connected to the neutral line end of the secondary circuit power supply; the normally closed contact of the reverse position intermediate relay is connected to the distributed control system; this patent also has the same technical problems as above and needs to be solved. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a high-temperature resistant thermal power plant boiler soot blower which can move to blow soot and clean the ash.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0009] A high-temperature resistant thermal power plant boiler soot blower includes a frame, a central axis fixedly connected to the frame, a crane slidably connected to the frame, a first drive device for driving the crane to slide along the frame, an air jet pipe with one end rotatably connected to the crane, a second drive device for driving the air jet pipe to rotate, and compressed air connected to the other end of the air jet pipe, wherein the air jet pipe rotates around the central axis and can slide along the central axis.

[0010] Furthermore, the first driving device includes a rack provided on the frame, a gear meshing with the rack, and a first motor fixedly connected to the crane; the gear is installed at the output end of the first motor.

[0011] Furthermore, the second driving device includes a first sprocket fixedly connected to the air injection pipe, a second motor fixedly connected to the crane, a second sprocket fixedly connected to the output end of the second motor, and a chain arranged between the first sprocket and the second sprocket.

[0012] Furthermore, the frame is provided with a slideway, and the trolley is provided with rollers; both sides of the trolley slide along both sides of the slideway; and the rollers roll at the bottom of the slideway.

[0013] Furthermore, an air intake assembly is provided at one end of the air injection pipe close to the vehicle.

[0014] Furthermore, the air intake assembly includes an air intake sleeve fixedly connected to the vehicle, an air intake hole provided on the air intake sleeve, an air intake valve connected to one end of the air intake hole, an air intake ring groove provided on the outer wall of the injection pipe and connected to the other end of the air intake hole, an air intake groove provided on the inner wall of the injection pipe, and a connecting hole for connecting the air intake groove and the air intake ring groove; the air intake groove is arranged along the length direction of the injection pipe.

[0015] Furthermore, sealing rings are provided on the air intake sleeves on both sides of the air intake ring groove.

[0016] Furthermore, an air outlet is provided at one end of the air jet pipe away from the vehicle; the air outlet is a tapered hole, and the air outlet is communicated with the air inlet groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The crane is set up to drive the jet pipe into the boiler. The jet pipe rotates and slides to sweep the dust, so the cleaning is thorough.

[0019] 2. Through the set air intake assembly, compressed air enters the air intake hole from the air intake valve, flows into the air intake ring groove from the air intake hole, passes through the air intake ring groove and the connecting hole into the air intake slot, and finally blows soot through the air outlet hole;

[0020] 3. By setting the air outlet as a cone hole, the blowing pressure can be increased and the dust can be swept more thoroughly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic front view of the structure of the present invention;

[0022] Figure 2 It is a sectional left side view of the present invention;

[0023] Figure 3 for Figure 1 Enlarged view of point E;

[0024] Figure 4 for Figure 1 Enlarged view of point D;

[0025] Figure 5 It is a schematic front cross-sectional view of a local structure of the present invention;

[0026] Figure 6 for Figure 5 Cross-sectional view at AA.

[0027] Description of the accompanying figure numbers:

[0028] 1-frame, 11-slide, 2-traveling, 3-center axis, 4-injection pipe, 5-second drive device, 21-first motor, 22-gear, 23-rack, 24-roller, 41-inlet groove, 42-connecting hole, 43-inlet ring groove, 44-sealing ring, 45-inlet hole, 46-inlet valve, 47-outlet hole, 48-inlet sleeve, 51-first sprocket, 52-second sprocket, 53-chain. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0030] Example 1

[0031] See also Figures 1-6 As shown,

[0032] A high-temperature resistant thermal power plant boiler sootblower includes a frame 1, a central shaft 3 fixedly connected to the frame 1, a crane 2 slidably connected to the frame 1, a first drive device for driving the crane 2 to slide along the frame 1, an injection pipe 4 with one end rotatably connected to the crane 2, a second drive device 5 for driving the injection pipe 4 to rotate, and compressed air connected to the other end of the injection pipe 4, wherein the injection pipe 4 rotates around the central shaft 3 and can slide along the central shaft 3.

[0033] The first driving device includes a rack 23 provided on the frame 1 , a gear 22 meshing with the rack 23 , and a first motor 21 fixedly connected to the crane 2 ; the gear 22 is installed at the output end of the first motor 21 .

[0034] The second driving device 5 includes a first sprocket 51 fixedly connected to the air injection pipe 4, a second motor fixedly connected to the carriage 2, a second sprocket 52 fixedly connected to the output end of the second motor, and a chain 53 provided between the first sprocket 51 and the second sprocket 52. The chain and sprocket drive is relatively reliable and easy to match.

[0035] The frame 1 is provided with a slideway 11, and the trolley 2 is provided with rollers 24; both sides of the trolley 2 slide along the slideway 11; the rollers 24 roll at the bottom of the slideway 11. The trolley 2 rolls on the slideway 11 via the rollers 24, reducing the frictional resistance between the two.

[0036] An air intake assembly is provided at one end of the air injection pipe 4 close to the carriage 2. The air intake assembly is connected to a compressed air source;

[0037] The air intake assembly includes an air intake sleeve 48 fixedly connected to the vehicle 2, an air intake hole 45 provided on the air intake sleeve 48, an air intake valve 46 connected to one end of the air intake hole 45, an air intake ring groove 43 provided on the outer wall of the injection pipe 4 and connected to the other end of the air intake hole 45, an air intake groove 41 provided on the inner wall of the injection pipe 4, and a connecting hole 42 for connecting the air intake groove 41 and the air intake ring groove 43; the air intake groove 41 is arranged along the length direction of the injection pipe 4.

[0038] The compressed air source is connected to the air inlet valve 46 through a hose;

[0039] The end of the air injection pipe 4 away from the carriage 2 is provided with an air outlet 47;

[0040] The use process of the present invention,

[0041] When dust cleaning is required, the second motor is turned on, and the rotation of the second motor drives the second sprocket 52 to rotate. The second sprocket 52 drives the first sprocket 51 to rotate through the chain 53. The first sprocket 51 drives the air injection pipe 4 fixedly connected to it to rotate, and the air source is turned on. The compressed air passes through the air inlet valve 46 → the air inlet hole 45 → the air inlet ring groove 43 → the connecting hole 42 → the air inlet groove 41 → the air outlet hole 47 → the inner wall of the boiler;

[0042] The first motor 21 is started, the gear 22 rotates, and the gear 22 meshes with the rack 23. Under the action of the meshing force, the carriage 2 rolls forward along the slide 11, driving the jet pipe 4 to rotate and slide forward along the central axis 3. The compressed air ejected from the air outlet 47 blows away the ash on the inner wall of the boiler.

[0043] The first motor 21 is rotated in the reverse direction, and the crane 2 is withdrawn, and the ash can also be blown away when withdrawing.

[0044] Example 2

[0045] The structure of this embodiment is basically the same as that of embodiment 1.

[0046] The difference is that

[0047] like Figure 3 As shown, the air outlet hole 47 is a tapered hole, and the air outlet hole 47 is connected to the air inlet groove 41.

[0048] The conical holes can increase the pressure of the air outlet and sweep the dust more thoroughly.

[0049] The working principle of this embodiment is basically the same as that of embodiment 1, and will not be described here in detail.

[0050] Example 3

[0051] The structure of this embodiment is basically the same as that of embodiment 1.

[0052] The difference is that

[0053] like Figure 5 As shown, sealing rings 44 are provided on the intake sleeves 48 on both sides of the intake ring groove 43.

[0054] The sealing ring 44 is provided to prevent the compressed air from flowing out of the gap between the air injection pipe 4 and the central shaft 3, thereby preventing the pressure loss caused by poor sealing.

[0055] The working principle of this embodiment is basically the same as that of embodiment 1, and will not be described here in detail.

[0056] Example 4

[0057] The structure of this embodiment is basically the same as that of embodiment 1.

[0058] The difference is that

[0059] The outer wall of the air injection pipe 4 is sprayed with a heat-resistant material, such as a ceramic material, which is relatively heat-resistant and can prevent the air injection pipe 4 from being deformed.

[0060] The working principle of this embodiment is basically the same as that of embodiment 1, and will not be described here in detail.

[0061] The above describes in detail the preferred embodiments of this patent, but this patent is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of this patent.

[0062] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that the technical solutions described in the above embodiments may be modified or some of the technical features may be replaced with equivalents. It is also obvious for those skilled in the art to combine multiple technical solutions of the present invention. However, such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high temperature resistant thermal power plant boiler soot blower, characterized by: The invention comprises a frame (1), a central axis (3) fixedly connected to the frame (1), a crane (2) slidably connected to the frame (1), a first driving device for driving the crane (2) to slide along the frame (1), an air jet (4) with one end rotatably connected to the crane (2), a second driving device (5) for driving the air jet (4) to rotate, and compressed air connected to the other end of the air jet (4), wherein the air jet (4) rotates around the central axis (3) and slides along the central axis (3); The frame (1) is provided with a slideway (11), and the trolley (2) is provided with rollers (24); both sides of the trolley (2) slide along both sides of the slideway (11); the rollers (24) roll at the bottom of the slideway (11); An air intake assembly is provided at one end of the jet pipe (4) close to the carriage (2); The air intake assembly comprises an air intake sleeve (48) fixedly connected to the vehicle (2), an air intake hole (45) provided on the air intake sleeve (48), an air intake valve (46) connected to one end of the air intake hole (45), an air intake annular groove (43) provided on the outer wall of the jet pipe (4) and connected to the other end of the air intake hole (45), an air intake groove (41) provided on the inner wall of the jet pipe (4), and a connecting hole (42) for connecting the air intake groove (41) and the air intake annular groove (43); the air intake groove (41) is provided along the length direction of the jet pipe (4).

2. A high temperature resistant thermal power plant boiler sootblower according to claim 1, characterized in that: The first driving device comprises a rack (23) provided on the frame (1), a gear (22) meshing with the rack (23), and a first motor (21) fixedly connected to the crane (2); the gear (22) is installed at the output end of the first motor (21).

3. The high temperature resistant thermal power plant boiler sootblower according to claim 1, characterized in that: The second driving device (5) comprises a first sprocket (51) fixedly connected to the air injection pipe (4), a second motor fixedly connected to the crane (2), a second sprocket (52) fixedly connected to the output end of the second motor, and a chain (53) provided between the first sprocket (51) and the second sprocket (52).

4. The high temperature resistant thermal power plant boiler sootblower according to claim 1, characterized in that: Sealing rings (44) are provided on the air intake sleeves (48) on both sides of the air intake ring groove (43).

5. A high temperature resistant thermal power plant boiler sootblower according to claim 4, characterized in that: An air outlet (47) is provided at one end of the air jet pipe (4) away from the vehicle (2); the air outlet (47) is a tapered hole, and the air outlet (47) is connected to the air inlet groove (41).

Images