Distributed sound curtain decoking device for hearth

Abstract

The invention relates to the field of boiler facilities, in particular to a distributed sound curtain decoking device for a hearth, which comprises a sound wave generator, the outlet end of the sound wave generator is fixedly communicated with a communicating pipe, the end part of the communicating pipe is fixedly communicated with an expanding frame, and a bearing plate is embedded between the two ends of the expanding frame; a gathering piece is installed on the bearing plate, expanding shells are tightly attached to the front end face and the rear end face of the expanding frame, the bearing plate is tightly attached to the position between the two expanding shells, a locking piece is arranged between the expanding shells and the expanding frame, a device support is fixedly installed at the lower end of the sound wave generator, and an installation base is fixedly installed at the lower end of the device support. According to the device, the safety and the decoking efficiency during decoking are improved, meanwhile, sound waves can be fully utilized, energy waste is effectively reduced, the device can adapt to decoking holes with different intervals in a boiler, the use requirement is met, and meanwhile use is convenient.

Description

Technical Field

[0001] The invention relates to the field of boiler facilities, and in particular to a distributed acoustic curtain decoking device for a furnace. Background Art

[0002] The causes and hazards of coking in pulverized coal furnaces are important issues in the operation of pulverized coal furnaces, and have a significant impact on the normal operation and safe production of pulverized coal furnaces. Generally speaking, there are many factors that affect the coking of the furnace of a pulverized coal furnace, among which the fuel composition is one of the main factors. Large-area coking in the furnace during boiler operation will lead to ash collapse in the furnace, deterioration of heat transfer, burst of water-cooled wall tubes and other accidents that seriously endanger the safe operation of the boiler. The hazards of coking in the furnace are not only harmful to the boiler equipment, but also reduce the combustion efficiency of the boiler, cause flow field disorder in the furnace, and affect the normal organization of combustion in the furnace. The coking phenomenon increases the safety hazards inside the furnace, increases the possibility of accidents, and poses a major threat to safe production. Therefore, it is particularly important to clean the coking during the use of the boiler.

[0003] When removing coke, early coke is mostly handled through worker intervention. Once coke is deeply formed, it is difficult to remove effectively and the furnace must be stopped for treatment. Without stopping the furnace, the traditional way of removing coke is mainly to rely on workers to knock out the coke. Although this method is direct and effective, it requires high personal quality of the operators. When knocking out the coke, the collapse of the coke will cause a sudden change in the pressure in the furnace, causing hot smoke or flames to spray out from the knocking hole, posing a threat to the personal safety of the operators, and the workers' decoking efficiency is low. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a distributed acoustic curtain decoking device for a furnace.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is: a distributed sound curtain decoking device for a furnace, comprising a sound wave generator, the outlet end of the sound wave generator is fixedly connected to a connecting pipe, the end of the connecting pipe is fixedly connected to an expansion rack, a bearing plate is inlaid between the two ends of the expansion rack, a gathering piece is installed on the bearing plate, the front and rear end surfaces of the expansion rack are tightly attached to an expansion shell, the bearing plate is tightly attached between the two expansion shells, a locking piece is arranged between the expansion shell and the expansion rack, the lower end of the sound wave generator is fixedly installed with a device bracket, and the lower end of the device bracket is fixedly installed with a mounting seat.

[0006] Preferably, the gathering member includes a plurality of adjustment slots in a linear array opened on one side of the carrier plate, guide tubes are arranged inside the plurality of adjustment slots, sealing plates are embedded at the ends of the guide tubes, and the sealing plates are attached to the other side of the carrier plate.

[0007] Preferably, a plurality of plate grooves are opened in a linear array on the other side of the carrier plate, the sealing plate is fitted inside the plate groove, the plate groove is connected to the adjustment groove, and the sealing plate corresponds to the adjustment groove.

[0008] Preferably, two limiting ears are symmetrically extended from the outer surface of the guide tube, the limiting ears are attached to one side of the bearing plate, and fixing bolts are passed through the side surfaces of the limiting ears and tightened thereon, and the fixing bolts are pressed against the bearing plate.

[0009] Preferably, the locking member includes two threaded columns rotatably installed in the middle of the upper and lower end surfaces of the expansion frame, the outer surfaces of the two threaded columns are screwed with threaded sleeves, and the outer surfaces of the threaded sleeves are symmetrically extended with two pressure frames, and the upper and lower edges of the front and rear end surfaces of the expansion shell are tightened with shell pressure plates, and the shell pressure plates are connected to the pressure frames.

[0010] Preferably, a sliding sleeve is embedded through the end of the pressing frame, a guide column is slidably installed inside the sliding sleeve, both ends of the guide column pass through the upper and lower ends of the sliding sleeve, the end of the guide column is fixed to the expansion frame, the end of the expansion shell is connected to a connecting rod, and the connecting rod is connected to the expansion frame.

[0011] Preferably, a shell connection block is embedded in the middle of the connecting rod, and the end of the shell connection block is fixed to the expansion shell. The upper and lower ends of the connecting rod are rotatably installed with extension rod seats, and the end of the extension rod seat is fixed to the expansion frame. The end of the threaded column is coaxially fixed with a hand wheel. The front and rear ends of the pressing frame are connected to multiple push plate frames, one end of the push plate frame is connected to a flip frame, one end of the flip frame is fixed to the shell pressure plate, and the other end of the flip frame is connected to the expansion frame.

[0012] Preferably, a flip shaft is rotatably installed through the other end of the flip frame, and a fixed shaft seat is inlaid at the end of the flip shaft, and the end of the fixed shaft seat is fixed to the expansion frame, a No. 2 connecting frame is fixedly installed in the middle of the flip frame, and a No. 2 connecting shaft is inlaid inside the No. 2 connecting frame, one end of the push plate frame is rotatably installed on the outer surface of the No. 2 connecting shaft, and a No. 1 connecting shaft is rotatably installed through the other end of the push plate frame, and a No. 1 connecting shaft is inlaid at the end of the No. 1 connecting shaft, and the end of the No. 1 connecting frame is fixed to the pressing frame.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. Use the sound wave generator to emit sound waves, and under the guidance of the expansion shell and expansion rack, expand the range of the sound curtain, so that the sound waves can enter the furnace through the coking hole on the boiler, so that the sound field fills the entire furnace, so as to form a sound curtain barrier on the surface of the furnace water-cooled wall to prevent the semi-molten alkali metal salt from adhering to the surface of the furnace water-cooled wall, and at the same time destroy the adhesion between dust particles and between dust and furnace wall, so that it is in a loose fluidized state, detached from its attachment surface, and carried away with the flue gas or collected by gravity. The process avoids manual decoking by workers, thereby effectively improving the safety and decoking efficiency during decoking.

[0014] 2. Through the provided guide tube, the guide tube can be extended into the coking hole of the boiler to conduct the sound waves, so as to ensure that the emitted sound waves can all enter the furnace, so as to achieve the purpose of fully utilizing the sound waves and reduce energy waste. By loosening the fixing bolts, the fixed guide tube can be allowed to slide, so that the guide tube can move in the adjustment groove to adjust the spacing between multiple guide tubes, so that it can adapt to the coking holes of different spacings on the boiler, so as to meet the use requirements.

[0015] 3. By rotating the threaded column, the threaded sleeve can be driven to move, and then the pressure frame can be driven to move, so as to drive the push plate frame to move, pull the flip frame, and make the shell pressure plate flip around the flip axis and detach from the expansion shell. Then, the expansion shell is pushed so that the expansion shell can rotate around the connecting rod to open the expansion shell, so that the interior of the expansion shell and the expansion frame can be fully exposed, so as to facilitate the subsequent maintenance and cleaning of smoke and dust attached to the surface, thereby effectively facilitating use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a distributed acoustic curtain decoking device for a furnace according to the present invention; Figure 2 It is a schematic diagram of the expansion shell of a distributed acoustic curtain decoking device for a furnace according to the present invention; Figure 3 It is a schematic diagram of an expansion frame of a distributed acoustic curtain decoking device for a furnace according to the present invention; Figure 4 A distributed acoustic curtain decoking device for a furnace according to the present invention Figure 1 A magnified view of middle; Figure 5 It is a schematic diagram of a guide pipe of a distributed acoustic curtain decoking device for a furnace according to the present invention; Figure 6 The present invention is a schematic diagram of a guide column of a distributed acoustic curtain decoking device for a furnace.

[0017] In the figure: 1, sound wave generator; 2, device bracket; 3, expansion shell; 4, bearing plate; 5, guide tube; 6, expansion frame; 7, connecting tube; 8, connecting rod; 9, extension rod seat; 10, shell pressure plate; 11, pressure frame; 12, hand wheel; 13, threaded column; 14, threaded sleeve; 15, adjustment slot; 16, limit ear; 17, fixing bolt; 18, sealing plate; 19, plate slot; 20, shell connection block; 21, guide column; 22, No. 1 connection frame; 23, push plate frame; 24, No. 2 connection frame; 25, fixed shaft seat; 26, flip shaft; 27, flip frame; 28, sliding sleeve; 29, No. 1 connecting shaft; 30, No. 2 connecting shaft; 31, mounting seat. DETAILED DESCRIPTION

[0018] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0019] like Figure 1-Figure 6 A distributed acoustic curtain decoking device for a furnace is shown, comprising an acoustic wave generator 1, which adopts an air-sound structure. A high-speed rotating acoustic disk cuts the compressed air flow to generate high-intensity oscillating sound waves with a sound power of up to 30,000 watts. Since the acoustic wave generator 1 is a prior art and has been widely used, it is not elaborated on in detail here. The outlet end of the acoustic wave generator 1 is fixedly connected to a connecting pipe 7, and the end of the connecting pipe 7 is fixedly connected to an expansion rack 6. A bearing plate 4 is inlaid between the two ends of the expansion rack 6, and a gathering piece is installed on the bearing plate 4. The front and rear end surfaces of the expansion rack 6 are both tightly attached to an expansion shell 3. The expansion rack 6 and the expansion shell 3 can expand the range of the acoustic curtain, so that most of the water-cooled wall is in a protected state. The bearing plate 4 is tightly attached between the two expansion shells 3, and a locking piece is provided between the expansion shell 3 and the expansion rack 6. The lower end of the acoustic wave generator 1 is fixedly installed with a device bracket 2, and the lower end of the device bracket 2 is fixedly installed with a mounting seat 31 The device bracket 2 and the mounting seat 31 play the role of supporting and fixing the sound wave generator 1. The sound wave generator 1 is placed next to the boiler. At this time, the guide pipe 5 is inserted into the coking hole. Then the sound wave generator 1 works to emit sound waves, and under the guidance of the expansion shell 3 and the expansion frame 6, the range of the sound curtain is expanded, so that the sound waves can enter the furnace through the coking hole on the boiler, so that the sound field fills the entire furnace, so as to form a layer of sound curtain barrier on the surface of the furnace water-cooled wall to prevent the semi-molten alkali metal salt from adhering to the surface of the furnace water-cooled wall, and at the same time destroy the adhesion between the dust particles and between the dust and the furnace wall, so that it is in a loose fluidized state, separated from its attachment surface, and taken away with the flue gas or collected by gravity. The expansion frame 6, the expansion shell 3, the bearing plate 4, the guide pipe 5, the sealing plate 18 and other components are made of heat-resistant cast steel, and can be installed in the secondary air box or SOFA bellows, cooled by secondary air, to ensure that they will not be burned by high temperature.

[0020] The gathering piece includes a plurality of adjusting slots 15 which are opened in a linear array on one side of the supporting plate 4. A guide tube 5 is arranged inside each of the adjusting slots 15. The adjusting slots 15 serve to allow the guide tube 5 to shift. A sealing plate 18 is inlaid at the end of the guide tube 5. The sealing plate 18 is attached to the other side of the supporting plate 4. The sealing plate 18 can seal the adjusting slot 15. The guide tube 5 extends into the coking hole of the boiler for sound wave conduction, which can ensure that the emitted sound waves can all enter the furnace, so as to achieve the purpose of making full use of the sound waves and reduce energy waste.

[0021] A plurality of plate grooves 19 are provided in a linear array on the other side of the carrier plate 4 , and the sealing plate 18 is fitted inside the plate groove 19 . The plate groove 19 plays a role of engaging with the sealing plate 18 . The plate groove 19 is connected to the adjustment groove 15 , and the sealing plate 18 corresponds to the adjustment groove 15 .

[0022] Two limiting ears 16 extend symmetrically from the outer surface of the guide tube 5. The limiting ear 16 is attached to one side of the bearing plate 4. The limiting ear 16 supports the fixing bolt 17. The side of the limiting ear 16 is penetrated by a fixing bolt 17 that is screwed on. The fixing bolt 17 is pressed against the bearing plate 4 to fix the guide tube 5. The fixing bolt 17 is loosened to allow the fixed guide tube 5 to slide, so that the guide tube 5 can move in the adjusting groove 15 to adjust the spacing between the multiple guide tubes 5 so that it can adapt to the spacing of the coking holes on the boiler.

[0023] The locking part includes two threaded columns 13 rotatably installed in the middle of the upper and lower end surfaces of the expansion frame 6, the outer surfaces of the two threaded columns 13 are screwed with threaded sleeves 14, and the outer surfaces of the threaded sleeves 14 are symmetrically extended with two pressing frames 11. The threaded columns 13 and the threaded sleeves 14 play a role in driving the pressing frames 11 to move. The upper and lower edges of the front and rear end surfaces of the expansion shell 3 are pressed with shell pressing plates 10, and the shell pressing plates 10 are connected to the pressing frames 11. The shell pressing plates 10 play a role in pressing the expansion shell 3 onto the expansion frame 6. At the same time, the shell pressing plates 10 can press the expansion shell 3 at multiple points to ensure the sealing between the expansion shell 3 and the expansion frame 6.

[0024] A sliding sleeve 28 is embedded in the end of the pressing frame 11, and a guide column 21 is slidably installed inside the sliding sleeve 28. The sliding sleeve 28 and the guide column 21 serve to guide the pressing frame 11. Both ends of the guide column 21 pass through the upper and lower ends of the sliding sleeve 28. The end of the guide column 21 is fixed to the expansion frame 6. The end of the expansion shell 3 is connected to a connecting rod 8, which is connected to the expansion frame 6. The connecting rod 8 serves to connect the expansion shell 3.

[0025] A shell connection block 20 is embedded in the middle of the connecting rod 8, and the end of the shell connection block 20 is fixed to the expansion shell 3. The shell connection block 20 plays a role in fixing the connecting rod 8 and the expansion shell 3 together. The upper and lower ends of the connecting rod 8 are rotatably installed with an extension rod seat 9, and the extension rod seat 9 plays a role in bearing the connecting rod 8. The end of the extension rod seat 9 is fixed to the expansion frame 6, and the end of the threaded column 13 is coaxially fixed with a hand wheel 12. The hand wheel 12 plays a role in facilitating the rotation of the threaded column 13. The front and rear ends of the pressing frame 11 are connected to a plurality of push plate frames 23, and one end of the push plate frame 23 is connected to a flip frame 27. One end of the flip frame 27 is fixed to the shell pressure plate 10, and the push plate frame 23 plays a role in driving the flip frame 27 to move. The other end of the flip frame 27 is connected to the expansion frame 6, and the flip frame 27 plays a role in tightening the shell pressure plate 10 against the expansion shell 3.

[0026] The other end of the flip frame 27 is rotatably installed with a flip shaft 26, and the end of the flip shaft 26 is inlaid with a fixed shaft seat 25. The flip shaft 26 serves to rotate the flip frame 27. The end of the fixed shaft seat 25 is fixed to the expansion frame 6, and the fixed shaft seat 25 serves to support the flip shaft 26. The middle part of the flip frame 27 is fixedly installed with a second connecting frame 24. The interior of the second connecting frame 24 is inlaid with a second connecting shaft 30, and the second connecting frame 24 serves to support the second connecting shaft 30. One end of the push plate frame 23 is rotatably mounted on the outer surface of the No. 2 connecting shaft 30, and the No. 2 connecting shaft 30 serves to facilitate the connection of the push plate frame 23. The other end of the push plate frame 23 passes through and is rotatably mounted with the No. 1 connecting shaft 29. The end of the No. 1 connecting shaft 29 is inlaid with the No. 1 connecting frame 22, and the No. 1 connecting shaft 29 serves to facilitate the connection with the push plate frame 23. The end of the No. 1 connecting frame 22 is fixed to the pressure frame 11, and the No. 1 connecting frame 22 serves to support the No. 1 connecting shaft 29.

[0027] When in use, first loosen the fixing bolts 17 to allow the fixed guide tube 5 to slide, so that the guide tube 5 can move in the adjustment slot 15, so as to adjust the spacing between the multiple guide tubes 5 so that it can adapt to the spacing size of the coking holes on the boiler, and then put the sound wave generator 1 next to the boiler. At this time, the guide tube 5 is inserted into the coking hole, and then the sound wave generator 1 works to emit sound waves, and under the guidance of the expansion shell 3 and the expansion frame 6, the range of the sound curtain is expanded, so that the sound waves can pass through the coking holes on the boiler and enter the furnace, so that the sound field fills the entire furnace, so as to form a layer of sound curtain barrier on the surface of the furnace water-cooled wall, so as to prevent the semi-molten alkali metal salt from adhering to the surface of the furnace water-cooled wall, and at the same time destroy the adhesion between the dust particles and between the dust and the furnace wall. It is put into a loose fluidized state, separated from its attached surface, and carried away with the smoke or collected by gravity. When smoke and dust are attached to the inside of the expansion shell 3 and the expansion frame 6 after long-term use and affect the conduction of sound waves, the threaded column 13 can be rotated to drive the threaded sleeve 14 to move, and then drive the pressure frame 11 to move, so as to drive the push plate frame 23 to move, and pull the flip frame 27 so that the pressure shell plate 10 can be flipped around the flip axis 26 and separated from the expansion shell 3. Then, the expansion shell 3 is pushed so that the expansion shell 3 can be rotated around the connecting rod 8 to open the expansion shell 3, so that the interior of the expansion shell 3 and the expansion frame 6 can be fully exposed, and then the smoke and dust attached to the surface can be maintained and cleaned to ensure subsequent use.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A distributed acoustic curtain decoking device for a furnace, characterized in that: The invention comprises a sound wave generator (1), wherein the outlet end of the sound wave generator (1) is fixedly connected to a connecting pipe (7), the end of the connecting pipe (7) is fixedly connected to an expansion frame (6), a bearing plate (4) is inlaid between the two ends of the expansion frame (6), a gathering piece is installed on the bearing plate (4), the front and rear end surfaces of the expansion frame (6) are both tightly attached to expansion shells (3), the bearing plate (4) is tightly attached between the two expansion shells (3), a locking piece is arranged between the expansion shell (3) and the expansion frame (6), the lower end of the sound wave generator (1) is fixedly mounted to an instrument bracket (2), and the lower end of the instrument bracket (2) is fixedly mounted to a mounting seat (31).

2. A distributed acoustic curtain decoking device for a furnace according to claim 1, characterized in that: The gathering member comprises a plurality of adjustment slots (15) formed in a linear array on one side of a carrier plate (4), guide tubes (5) being arranged inside the plurality of adjustment slots (15), sealing plates (18) being inlaid at the ends of the guide tubes (5), and the sealing plates (18) being attached to the other side of the carrier plate (4).

3. A distributed acoustic curtain decoking device for a furnace according to claim 2, characterized in that: A plurality of plate slots (19) are formed in a linear array on the other side of the carrier plate (4), the sealing plate (18) is fitted inside the plate slot (19), the plate slot (19) is connected to the adjustment slot (15), and the sealing plate (18) corresponds to the adjustment slot (15).

4. A distributed acoustic curtain decoking device for a furnace according to claim 3, characterized in that: The outer surface of the guide tube (5) is symmetrically extended with two limiting ears (16), the limiting ears (16) being attached to one side of the bearing plate (4), and the side surface of the limiting ears (16) being penetrated by a fixing bolt (17) which is screwed on, and the fixing bolt (17) is pressed against the bearing plate (4).

5. A distributed acoustic curtain decoking device for a furnace according to claim 1, characterized in that: The locking member comprises two threaded columns (13) rotatably mounted in the middle of the upper and lower end surfaces of the expansion frame (6); the outer surfaces of the two threaded columns (13) are both screwed with threaded sleeves (14); the outer surfaces of the threaded sleeves (14) are symmetrically extended with two pressing frames (11); the upper and lower edges of the front and rear end surfaces of the expansion shell (3) are both pressed with shell pressing plates (10); the shell pressing plates (10) are connected to the pressing frames (11).

6. A distributed acoustic curtain decoking device for a furnace according to claim 5, characterized in that: The end of the press frame (11) is penetrated and inlaid with a sliding sleeve (28), and a guide column (21) is slidably installed inside the sliding sleeve (28). The two ends of the guide column (21) pass through the upper and lower ends of the sliding sleeve (28), and the end of the guide column (21) is fixed to the expansion frame (6). The end of the expansion shell (3) is connected to a connecting rod (8), and the connecting rod (8) is connected to the expansion frame (6).

7. A distributed acoustic curtain decoking device for a furnace according to claim 6, characterized in that: A shell connection block (20) is embedded in the middle of the connecting rod (8), and the end of the shell connection block (20) is fixed to the expansion shell (3). The upper and lower ends of the connecting rod (8) are rotatably mounted with an extension rod seat (9), and the end of the extension rod seat (9) is fixed to the expansion frame (6). The end of the threaded column (13) is coaxially fixedly mounted with a hand wheel (12). The front and rear ends of the pressing frame (11) are connected to a plurality of push plate frames (23), and one end of the push plate frame (23) is connected to a flip frame (27). One end of the flip frame (27) is fixed to the shell pressing plate (10), and the other end of the flip frame (27) is connected to the expansion frame (6).

8. A distributed acoustic curtain decoking device for a furnace according to claim 7, characterized in that: The other end of the flip frame (27) is penetrated and rotatably mounted with a flip shaft (26), the end of the flip shaft (26) is inlaid with a fixed shaft seat (25), the end of the fixed shaft seat (25) is fixed to the expansion frame (6), the middle part of the flip frame (27) is fixedly mounted with a second connection frame (24), the interior of the second connection frame (24) is penetrated and inlaid with a second connecting shaft (30), one end of the push plate frame (23) is rotatably mounted on the outer surface of the second connecting shaft (30), the other end of the push plate frame (23) is penetrated and rotatably mounted with a first connecting shaft (29), the end of the first connecting shaft (29) is inlaid with a first connection frame (22), and the end of the first connection frame (22) is fixed to the pressing frame (11).

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