A horizontal flue ash accumulation cleaning system and method

Abstract

The present invention relates to a horizontal flue ash cleaning system and method, comprising: a soot blowing device and a gas supply mechanism. The gas supply mechanism is connected to one set or multiple sets of soot blowing devices correspondingly. Each set of soot blowing devices includes a rotating assembly and a nozzle. The nozzle is rotatably connected to the rotating assembly and rotates with the rotating assembly. The nozzle includes spray pipes circumferentially and equidistantly communicated with the outer side surface of the air distributor. One end of the spray pipe facing away from the air distributor is provided with a nozzle inclined downward along the horizontal direction. A guide vane is arranged in the nozzle, and the inclination angle of each nozzle is different. An air inlet is arranged at the bottom of the air distributor, and the gas supply mechanism is communicated with the air inlet. 360° rotating purging is realized through the cooperation of the nozzle and the rotating assembly under the action of compressed air. The strong disturbance of the ash in the flue can be generated by the nozzle containing the guide vane and inclined downward, and the purging of different distances inside the flue is realized by using different inclination angles of the nozzles, which not only ensures the safe operation of the equipment but also can reduce the operation cost.

Description

Technical Field

[0001] The present invention relates to the field of flue ash treatment, and particularly to a horizontal flue ash cleaning system and method. Background Art

[0002] In the prior art, soot blowing devices are arranged at the ash accumulation part under the horizontal flue gas duct, which are used to lift the deposited fly ash when the soot blowing devices operate at high load, and the fly ash is carried by high-speed flue gas into the dust collector, and then removed by the dust collector. Common existing soot blowing devices include wind cap type, rotary drum type and diversion type, etc. However, there are problems such as limited ash cleaning range, difficult-to-clean dead corners and large working medium consumption in actual use. Therefore, there is still a large room for improvement in ash cleaning technology. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of limited ash cleaning range, difficult-to-clean dead corners and working medium consumption in the ash blowing device in the horizontal flue in the prior art, so as to provide a horizontal flue ash cleaning system and method.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A horizontal flue ash cleaning system includes a soot blowing device and a gas supply mechanism, and the gas supply mechanism is connected to one set or multiple sets of soot blowing devices correspondingly.

[0006] Each set of the soot blowing devices includes a rotating component and a spray head.

[0007] The spray head is rotatably connected to the rotating component and rotates with the rotating component.

[0008] The spray head includes an air distributor and at least three spray pipes. The spray pipes are circumferentially and equidistantly connected to the outer side surface of the air distributor. One end of the spray pipe facing away from the air distributor is provided with a nozzle. The nozzle is inclined downward along the horizontal direction, and the inclination angle of each nozzle is different.

[0009] An air inlet is arranged at the bottom of the air distributor, and the gas supply mechanism is connected to the air inlet.

[0010] Preferably, the number of the spray pipes is three, and the angles of the nozzles along the horizontal direction downward are 15°, 30° and 45° respectively.

[0011] Preferably, the nozzle includes a convergent-divergent nozzle.

[0012] Preferably, a plurality of guide vanes are further arranged inside the nozzle. The guide vanes are circumferentially and equidistantly fixed on the inner surface of the nozzle, and the rotation directions of the plurality of guide vanes are the same.

[0013] Preferably, the rotating assembly includes a sleeve and a fixed shaft.

[0014] The sleeve is fixedly connected inside the spray head, and there is a first gap for compressed air to flow between the air distributor and the outer surface of the sleeve.

[0015] The sleeve is rotatably sleeved on the fixed shaft.

[0016] Moreover, a plurality of bearing members are provided between the sleeve and the fixed shaft.

[0017] Preferably, the air supply mechanism includes an air supply device, an air supply pipeline, and multiple sets of connection components.

[0018] The air supply pipeline includes a main pipe and several branch pipes. One end of the main pipe is connected to the air supply device, and the other end is connected to several branch pipes. The branch pipes include outer branch pipes and inner branch pipes. The outer branch pipes are located outside the horizontal flue and are connected to the main pipe, and the inner branch pipes are located inside the horizontal flue and are connected to the outer branch pipes in one-to-one correspondence.

[0019] A plurality of connection holes are equidistantly formed on the outer surface of the inner branch pipe, and the connection holes are communicated with the inner branch pipe; the number of connection components corresponds to the number of connection holes one by one, and the number of soot blowing devices corresponds to the number of connection components one by one.

[0020] Preferably, the connection component includes a bracket and a sealing sleeve.

[0021] One end of the bracket is fixed in the connection hole, and the other end is fixedly connected to one end of the fixed shaft facing away from the sleeve.

[0022] One end of the sealing sleeve is hermetically communicated with the connection hole, and the other end is movably communicated with one end of the air distributor having an air inlet.

[0023] The bracket and the fixed shaft are wrapped in the sealing sleeve, and there is a second gap for compressed air to flow between the bracket and the fixed shaft and the sealing sleeve.

[0024] Preferably, it further includes a static and dynamic seal, and the static and dynamic seal is provided between the air distributor and the sealing sleeve.

[0025] Preferably, the air supply mechanism further includes a control component and an infrared sensor.

[0026] The control component includes a main control valve and a split control valve.

[0027] The main control valve is switchably arranged on the main pipe, the split control valve is switchably arranged on the outer branch pipe, and the split control valve is an electric regulating valve.

[0028] The infrared sensors are arranged at the bottom of the flue, and the number of the infrared sensors is set in one-to-one correspondence with the split control valves, and the infrared sensors are signal-connected to the split control valves.

[0029] A method for cleaning ash accumulation in a horizontal flue is carried out by using the above horizontal flue ash accumulation cleaning system, and includes the following steps: starting the air supply equipment to provide compressed air to the main compressed air pipe, and opening the main control valve arranged on the main compressed air pipe to provide compressed air to each branch pipe, detecting the ash accumulation information in the flue through the infrared sensors, and controlling the opening degree of the split control valves; enabling the compressed air to be transported from the main compressed air pipe and the branch pipes to each branch nozzle, and finally ejected from the nozzles arranged on the nozzles. Based on the orientation and angle of the nozzles, the spray heads are made to rotate 360° by relying on the centrifugal force under the action of the compressed air in cooperation with the rotating assembly, so as to clean the inside of the flue.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] In the above technical solution, a horizontal flue ash accumulation cleaning system and method are provided. Through the cooperation of the spray heads and the rotating assembly, 360° rotation blowing is achieved under the action of compressed air, so as to achieve the purpose of full-coverage ash blowing with a small amount of compressed air; through the inclusion of guide vanes and the nozzles arranged to be inclined downward, strong disturbance can be generated to the ash accumulation in the flue, avoiding the occurrence of ash accumulation dead corners; and by using different inclination angles of the nozzles, blowing of the inside of the flue at close range, medium range and long range is realized, which not only ensures the operation safety, but also can reduce the operation cost. Description of the Drawings

[0032] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 It is a schematic diagram of the overall structure of the system according to the embodiment of the present invention.

[0034] Figure 2 It is a cross-sectional view of the ash suction spray head according to the embodiment of the present invention.

[0035] Figure 3 It is a schematic top view structure diagram of the ash suction spray head according to the embodiment of the present invention.

[0036] Figure 4 It is a schematic cross-sectional structure diagram of the nozzle according to the embodiment of the present invention.

[0037] Description of the reference numerals:

[0038] 1. Main pipe; 2. External branch pipe; 3. Internal branch pipe; 4. Main control valve; 5. Split control valve; 6. Nozzle; 7. Horizontal flue; 8. Rotating part; 9. Seal; 10. Nozzle; 11. Nozzle; 12. Air distributor; 13. Fixed shaft; 14. Sleeve; 15. Bearing; 16. Guide vane. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0042] The embodiment of the present invention provides a horizontal flue dust cleaning system, such as Figures 1 to 4 As shown, it includes: a soot blowing device and an air supply mechanism, the air supply mechanism is used to provide compressed air to the soot blowing device, and the air supply mechanism can correspond to one or more soot blowing devices, that is, one air supply mechanism can provide compressed air to one or more soot blowing devices, and then use the soot blowing device to output compressed air to lift the accumulated ash or fly ash in the horizontal flue 7, and carry it into the dust collector at the rear for removal through high-speed flue gas.

[0043] In the prior art, when cleaning the ash accumulation in the flue, most of the rotary drum type, diversion type or wind cap type soot blowing devices are adopted. Since the nozzle angles of the rotary drum type, diversion type and wind cap type soot blowing devices are all set at a single angle, the ash cleaning range is limited, and there are usually ash accumulation dead corners in the specific ash cleaning process, which further leads to a large amount of working medium loss during the operation of the equipment.

[0044] Specifically, each soot blowing device includes a rotating assembly and a nozzle 6. The nozzle 6 is rotatably connected to the rotating assembly and rotates with the rotating assembly to comprehensively blow the ash accumulation or fly ash inside the horizontal flue 7; as Figure 2 shown, the nozzle 6 includes an air distributor 12 and at least three spray pipes 10, and the number of the spray pipes 10 should be determined according to the actual requirements; in order to keep the nozzle 6 stable when rotating with the rotating assembly, the spray pipes 10 are circumferentially and equidistantly connected to the outer side of the air distributor 12, and a nozzle 11 is provided at one end of the spray pipe 10 facing away from the air distributor 12 to facilitate the discharge of compressed air; in order to facilitate the air distributor 12 to deliver uniform compressed air to each spray pipe 10, the air distributor 12 is preferably a columnar structure, and an air inlet is provided at the bottom of the air distributor 12, and the air supply mechanism is connected to the air inlet.

[0045] It should be noted that the nozzles 11 are all inclined downward along the horizontal direction so that the discharged compressed air can better blow up the ash accumulation or fly ash in the horizontal flue 7; and the inclination angles of each nozzle 11 are different, so as to realize the ash cleaning of the ash accumulation at different distances in the horizontal flue 7; preferably, the reaction force of the compressed air ejected from the nozzle 11 is used to cooperate with the rotating mechanism to achieve the purpose of soot blowing without dead corners of 360°; compared with the design in the prior art, a large amount of compressed air can be saved, which not only ensures the operation safety but also can reduce the operation cost.

[0046] Preferably, when the number of the spray pipes 10 is three, in order to achieve a good soot blowing effect, the angles of the nozzles 11 inclined downward along the horizontal direction are 15°, 30° and 45° respectively, so as to realize the soot blowing operations at long distance, medium distance and short distance with the nozzle 6; and by the cooperation of the nozzles 11 with different inclination angles, the compressed air can be blown out from different angles; and the nozzle 6 rotates 360° under the reaction force of the compressed air and cooperates with the rotating mechanism. On the one hand, the nozzles 11 with different inclination angles can always form a soot blowing action on the bottom of the horizontal flue 7, and on the other hand, the rotation can make the flowing range of the ejected compressed air wider, further expanding the soot blowing area; thus, the ejected compressed air can blow to all corners of the horizontal flue 7 to achieve the purpose of soot blowing without dead corners.

[0047] Furthermore, in the prior art, the nozzle 11 is mostly straight cylindrical, resulting in a relatively small range of compressed air blown out. In order to increase the radial purging range of the nozzle 11 during soot blowing in this application, the nozzle 11 is set as a convergent-divergent type. When the compressed air flow reaches the throat with the smallest cross-sectional area of the convergent-divergent nozzle 11, the local flow velocity of the compressed air increases. As the cross-sectional area of the nozzle 11 increases, the compressed air begins to expand, and its flow velocity further increases during the expansion process, thereby further increasing the purging range of the compressed air.

[0048] Moreover, in order to prevent ash deposition and further improve the purging effect, a number of guide vanes 16 are provided inside the nozzle 11. As Figure 4 shown, the guide vanes 16 are circumferentially and equidistantly fixed on the inner surface of the nozzle 11, and the rotation directions of the plurality of guide vanes 16 are the same, which can make the high-speed ejected compressed air have a rotating effect under the action of the guide vanes 16, thereby strengthening the disturbance of fly ash and deposited ash and avoiding ash deposition in the flue.

[0049] As Figures 2 to 3 shown, the rotating assembly includes a sleeve 14 and a fixed shaft 13. The sleeve 14 is fixedly connected inside the nozzle head 6, and there is a first gap for compressed air to flow between the air distributor 12 and the outer surface of the sleeve 14. That is, the compressed air output by the air supply assembly flows into the air distributor 12 through the first gap. The sleeve 14 is rotatably sleeved on the fixed shaft 13. When the sleeve 14 rotates relative to the fixed shaft 13, the nozzle head 6 will rotate relative to the fixed shaft 13 along with the sleeve 14. Preferably, a plurality of bearing members 15 are further provided between the sleeve 14 and the fixed shaft 13. In addition, a rotating part 8 is provided at the top of the nozzle head 6 to make the rotation of the nozzle head 6 relative to the fixed shaft 13 along with the sleeve 14 smoother. Furthermore, in order to ensure good airtightness between the nozzle head 6 and the sleeve 14, a seal 9 is provided at the connection position between the top of the nozzle head 6 and the sleeve 14.

[0050] Specifically, the air supply mechanism includes an air supply device, an air supply pipeline, and multiple sets of connection components. Among them, the air supply pipeline includes a main pipe and several branch pipes. One end of the main pipe 1 is connected to the air supply device, and the other end of the main pipe 1 is connected to several branch pipes for circulating the compressed air produced by the air supply device. Further, the branch pipes include outer branch pipes 2 and inner branch pipes 3. The outer branch pipes 2 are located outside the horizontal flue 7 and are connected to the main pipe 1, and the inner branch pipes 3 are located inside the horizontal flue 7 and are connected to the outer branch pipes 2 in one-to-one correspondence. Furthermore, a number of connection holes are equidistantly arranged on the outer surface of the inner branch pipe 3, and the connection holes are communicated with the inside of the inner branch pipe 3. The number of connection components is set in one-to-one correspondence with the number of connection holes, and the number of soot blowing devices is set in one-to-one correspondence with the number of connection components. That is, the compressed air produced by the air supply device will flow through the main pipe 1, the outer branch pipes 2 in sequence from the outside of the horizontal flue 7, and then be transported to the inner pipe inside the horizontal flue 7, and enter the soot blowing device through the connection holes on the inner branch pipe 3 via the connection components, and finally be ejected by the soot blowing device for purging work.

[0051] Preferably, the connection component includes a bracket and a sealing sleeve. One end of the bracket is fixed in the connection hole, and the other end is fixedly connected to one end of the fixed shaft 13 facing away from the sleeve 14 to form a supporting effect on the soot blowing component. To ensure the normal transmission of compressed air, one end of the sealing sleeve is hermetically connected to the connection hole, and the other end is movably communicated with one end of the air distributor 12 having an air inlet. The bracket and the fixed shaft 13 are wrapped in the sealing sleeve, and there is also a second gap for the compressed air to flow between the bracket, the fixed shaft 13 and the sealing sleeve. That is, the compressed air flows out from the air supply device, flows through the main pipe 1, the outer branch pipes 2 and the inner branch pipes 3 in sequence, and then passes through the second gap between the sealing sleeve and the bracket and the fixed shaft 13 through the connection holes on the inner branch pipe 3, and then enters each nozzle 10 through the first gap between the air distributor 12 and the outer surface of the sleeve 14, and finally is ejected from the nozzle 11.

[0052] To ensure that the nozzle 6 can rotate 360° under the action of the rotating component and avoid the leakage of compressed air, a dynamic and static seal 9 is also provided at the connection between the sealing sleeve and the soot blowing device. Specifically, the dynamic and static seal 9 is provided between the air distributor 12 and the sealing sleeve to prevent the leakage of compressed air when the soot blowing device rotates.

[0053] In order to achieve the regulation of compressed air in each branch pipe, the air supply mechanism also includes a control component and an infrared sensor; specifically, the control component includes a main control valve 4 and a split control valve 5, wherein the main control valve 4 is arranged on the main pipe 1, and is used to control the on and off of the compressed air produced by the air supply equipment, and the air pressure output by the main control valve 4 is constant; the split control valve 5 is arranged on each external branch pipe 2, and is used to control the amount of compressed air in each soot blowing device; in order to facilitate the regulation and control of the split control valve 5, in this application, the split control valve 5 is preferably an electric regulating valve capable of three-stage regulation; specifically, the three-stage regulation is the large, medium and small opening adjustment of the split control valve 5.

[0054] In order to facilitate the accurate detection of the amount of ash accumulated in the flue, an infrared sensor is set at the bottom of the flue, and the number of infrared sensors and split control valves 5 is set one by one, and each infrared sensor is connected to the corresponding split control valve 5 signal; further, the amount of ash accumulated at the bottom of the flue is detected by the infrared sensor, and the detection signal is sent to the corresponding split control valve 5, thereby controlling the opening adjustment of the split control valve 5; that is, according to the amount of ash accumulated in the horizontal flue 7, each split control valve 5 is controlled and adjusted in a targeted manner.

[0055] Specifically, the infrared sensor includes a transmitter and a receiver that are arranged in a one-to-one correspondence. When the receiver receives a strong infrared signal emitted by the transmitter, it is judged that there is little or no ash accumulation at the bottom of the horizontal flue 7, and the corresponding split control valve 5 is adjusted to a small opening; when the receiver receives a weak infrared signal emitted by the transmitter, it is judged that there is some ash accumulation at the bottom of the horizontal flue 7, and the corresponding split control valve 5 is adjusted to a medium opening; when the receiver cannot normally receive the infrared signal emitted by the transmitter, it is judged that there is a lot of ash accumulation at the bottom of the horizontal flue 7, and the corresponding split control valve 5 is adjusted to a large opening.

[0056] The amount of ash accumulated at the bottom of the horizontal flue 7 can be accurately judged by the infrared sensor, and the infrared sensor is used in conjunction with the corresponding split control valve 5. On the one hand, it can effectively remove the ash accumulated at the bottom of the flue, avoid the accumulation of ash in the flue, and improve the safety and economy of the unit operation; on the other hand, the compressed air is output by graded regulation, which can effectively save the use of compressed air; in some embodiments, a pressure gauge is also included, and the pressure gauge is connected to each external branch pipe for staff to observe and record according to specific usage. By adopting this solution, at least 30% of compressed air can be saved.

[0057] A method for cleaning ash accumulation in a horizontal flue, which is carried out by using the horizontal flue 7 ash cleaning system described above, is characterized by including the following steps: Start the air supply equipment to provide compressed air to the main compressed air pipe 1, and open the main control valve 4 provided on the main compressed air pipe 1, so that the compressed air generated by the air supply equipment enters the main compressed air pipe 1 and flows through the main compressed air pipe to each branch pipe; Further, the infrared sensors arranged inside the horizontal flue 7 are used to detect the ash accumulation situation in the horizontal flue 7, so that the opening degree of the split control valve 5 is adjusted and controlled according to the real-time detection situation of the infrared sensors.

[0058] Specifically, that is, the compressed air flows from the main compressed air pipe 1 to each outer branch pipe 2. The split control valve 5 correspondingly arranged on the outer branch pipe 2 receives the detection signal from the infrared sensors in the horizontal flue 7 and controls the opening degree of the valve according to the received detection signal, so that the compressed air flows from each outer branch pipe 2 into the inner branch pipe 3, then flows into the sealing sleeve through the connection holes opened on the inner branch pipe 3, and then flows into the compressed air distributor 12. The compressed air distributor sends the compressed air to each spray pipe 10, and finally is sprayed out by the nozzles 11 on the spray pipe 10; Based on the setting of the orientation and different angles of the nozzles 11, the spray heads 6 are driven by the compressed air to cooperate with the rotating assembly to rotate 360° by relying on centrifugal force, thereby realizing the purpose of blowing ash without dead corners inside the horizontal flue 7.

[0059] The above embodiments are only the preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the protection scope required by the present invention.

Claims

1. A horizontal flue ash cleaning system, characterized in that It includes a soot blowing device and a gas supply mechanism. The gas supply mechanism is connected to one set or multiple sets of soot blowing devices correspondingly. Each set of the soot blowing devices includes a rotating component and a spray head. The spray head is rotationally connected to the rotating component and rotates with the rotating component. The spray head includes an air distributor and at least three spray pipes. The spray pipes are circumferentially and equidistantly connected to the outer side surface of the air distributor. One end of the spray pipe facing away from the air distributor is provided with a nozzle. The nozzle is inclined downward along the horizontal direction, and the inclination angle of each nozzle is different. A number of guide vanes are also arranged inside the nozzle. The guide vanes are circumferentially and equidistantly fixed on the inner surface of the nozzle, and the rotation directions of the number of guide vanes are the same. The rotating component includes a sleeve and a fixed shaft. The sleeve is fixedly connected inside the spray head, and there is a first gap for compressed air to flow between the air distributor and the outer surface of the sleeve. The sleeve is rotatably sleeved on the fixed shaft. And a plurality of bearing parts are also arranged between the sleeve and the fixed shaft. An air inlet is arranged at the bottom of the air distributor. The gas supply mechanism is connected to the air inlet.

2. The horizontal flue ash cleaning system according to claim 1, characterized in that The number of the spray pipes is three, and the angles of the nozzles along the horizontal direction downward are 15°, 30°, and 45° respectively.

3. The horizontal flue ash accumulation cleaning system according to claim 2, characterized in that, The nozzle includes a convergent-divergent nozzle.

4. A horizontal flue ash accumulation cleaning system according to claim 1, characterized in that, The gas supply mechanism includes a gas supply device, a gas supply pipeline, and multiple sets of connection components. The gas supply pipeline includes a main pipe and a number of branch pipes. One end of the main pipe is connected to the gas supply device, and the other end is connected to the number of branch pipes. The branch pipes include outer branch pipes and inner branch pipes. The outer branch pipes are located outside the horizontal flue and are connected to the main pipe, and the inner branch pipes are located inside the horizontal flue and are correspondingly connected to the outer branch pipes one by one. A number of connection holes are equidistantly arranged on the outer surface of the inner branch pipe. The connection holes are communicated with the inner branch pipe. The number of the connection components corresponds to the number of the connection holes one by one, and the number of the soot blowing devices corresponds to the number of the connection components one by one.

5. The horizontal flue ash cleaning system according to claim 4, characterized in that, The connection component includes a bracket and a sealing sleeve. One end of the bracket is fixed in the connection hole, and the other end is fixedly connected to one end of the fixed shaft facing away from the sleeve. One end of the sealing sleeve is hermetically connected to the connection hole, and the other end is movably connected to one end of the air distributor having the air inlet. The bracket and the fixed shaft are wrapped in the sealing sleeve, and there is a second gap for compressed air to flow between the bracket and the fixed shaft and the sealing sleeve.

6. The horizontal flue ash cleaning system according to claim 5, characterized in that, It also includes a static and dynamic seal. The static and dynamic seal is arranged between the air distributor and the sealing sleeve.

7. A horizontal flue ash accumulation cleaning system according to claim 5, characterized in that The gas supply mechanism also includes a control component and an infrared sensor. The control component includes a main control valve and a split control valve. The main control valve is arranged on the main pipe in a switchable manner. The split control valve is arranged on the outer branch pipe in a switchable manner. The split control valve is an electric control valve. The infrared sensor is arranged at the bottom of the flue. The number of the infrared sensors corresponds to the split control valves one by one, and the infrared sensors are signal-connected to the split control valves.

8. A method for cleaning ash accumulation in a horizontal flue, which is carried out by using the horizontal flue ash accumulation cleaning system described in any one of claims 1 to 7, characterized in that, It includes the following steps: Turn on the air supply equipment to supply compressed air to the main compressed air pipe, and open the main control valve installed on the main compressed air pipe to supply compressed air to each branch pipe. Detect the ash accumulation information in the flue through the infrared sensor, and control the opening degree of the split control valve; so that the compressed air is transported from the main compressed air pipe and the branch pipes to each branch nozzle, and finally ejected from the nozzles provided on the nozzles. Based on the orientation and angle of the nozzles, the sprinkler head rotates 360° under the action of the compressed air in cooperation with the rotating assembly by relying on the centrifugal force to clean the inside of the flue.

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