Flexible connecting hose, ash removal device and using method of ash removal device

Abstract

The invention discloses an ash removal device which comprises a blowing mechanism located below a catalyst and a dust collection mechanism located above the catalyst, an inlet of the blowing mechanism is connected with a flexible connecting hose, and an outlet of the blowing mechanism is communicated with a catalyst module and used for blowing compressed air into a catalytic reaction ventilation hole of the catalyst; the dust collecting mechanism comprises a sealing cover and a dust collecting pipe communicated with the sealing cover, the sealing cover seals the upper surface of the catalyst, and dust enters the dust collector from the sealing cover through the dust collecting pipe. According to the flexible connecting hose, the ash removal device and the using method of the ash removal device, the compressed air and the dust collector can be utilized to realize reliable ash removal of the interior of the catalyst.

Description

Technical Field

[0001] The present invention relates to the field of catalyst cleaning, and in particular to a flexible connecting hose, a cleaning device and a method for using the cleaning device. Background Art

[0002] With increasing environmental protection requirements, the cement industry faces tremendous pressure to reduce nitrogen oxide (NOx) emissions. Selective catalytic reduction (SCR) denitrification technology is widely used in the cement industry due to its high denitrification performance. However, in actual operation, SCR denitrification systems in the cement industry face many problems, among which catalyst clogging is particularly prominent.

[0003] The large amount of high-concentration dust generated during cement clinker production is one of the main causes of catalyst blockage. The dust concentration of the flue gas at the outlet of cement kiln preheater C1 is usually 100-190g / Nm 3 These dust particles are highly sticky and easily adhere to the catalyst surface and pores, causing pore blockage. Furthermore, during the denitrification process, ammonia in the flue gas reacts with SO₃ or SO₂ to form ammonium bisulfate, whose crystals also accumulate in the catalyst, further exacerbating catalyst blockage.

[0004] Catalyst blockage can lead to a series of problems. First, it reduces catalyst activity, lowering denitrification efficiency and making it difficult to meet stringent environmental emission standards. Second, it increases system resistance, increasing energy consumption, power consumption, and ammonia usage.

[0005] Current cleaning systems are immature, prone to blind spots, and ineffective at cleaning the catalyst's inner walls. This can easily lead to catalyst clogging, necessitating manual cleaning. However, manual cleaning can easily damage the catalyst, causing it to lose effectiveness and increasing production costs. Summary of the Invention

[0006] The purpose of the present invention is to provide a flexible connecting hose, a cleaning device and a method for using the cleaning device, which can use compressed air and a dust collector to reliably clean the inside of the catalyst.

[0007] To achieve the above-mentioned object, the present invention provides a dust cleaning device, characterized in that the dust cleaning device includes a purge mechanism located below the catalyst and a dust collecting mechanism located above the catalyst, the inlet of the purge mechanism being connected to a flexible connecting hose, and the outlet of the purge mechanism being connected to the catalyst module for blowing compressed air into the catalytic reaction ventilation holes of the catalyst;

[0008] The dust collecting mechanism includes a sealing cover and a dust collecting pipe connected to the sealing cover. The sealing cover seals the upper surface of the catalyst, and the dust enters the dust collector from the sealing cover through the dust collecting pipe.

[0009] Preferably, the purge mechanism includes a plurality of purge pipes, and the plurality of purge pipes are arranged in one-to-one correspondence with the catalytic reaction ventilation holes of the catalyst.

[0010] Preferably, the purging device further comprises a compressed air storage chamber, and the flexible connecting hose and the purging pipe are respectively located on both sides of the compressed air storage chamber.

[0011] The present invention also provides a method for using the dust cleaning device, comprising:

[0012] Step 1: Move the purge mechanism and the dust collection mechanism to the target catalyst module;

[0013] Step 2: Connect the flexible connecting hose to the compressed air source and connect the dust collecting pipe to the dust collector;

[0014] Step 3: The catalyst is purged with compressed air and the dust collector collects the dust;

[0015] Step 4: After the through-hole rate reaches the requirement, stop the compressed air purge;

[0016] Step 5: Transfer the purge mechanism and dust collection mechanism to the next catalyst module and repeat steps 2-4.

[0017] Preferably, the dust collecting pipe is configured as a metal-wrapped plastic hose.

[0018] Preferably, the dust collecting pipe and the flexible connecting hose are respectively provided with flow meters.

[0019] The present invention also provides a flexible connecting hose, comprising a hose body, a rigid support member, and connecting members located at both ends of the hose body, wherein the rigid support member is fixedly connected to the hose body;

[0020] A plurality of rigid support members are provided, and the plurality of rigid support members are fixedly arranged along the length direction of the hose body. Under the action of the rigid support members, the relative rotation angle between the connectors at both ends of the flexible hose is not greater than 180°.

[0021] Preferably, the rigid support member is configured to be elliptical, and two adjacent elliptical rigid support members are symmetrically arranged with respect to the cross section of the flexible connecting hose.

[0022] Preferably, the rigid support members are arranged in a circular shape, and two adjacent circular rigid support members are arranged in parallel.

[0023] Preferably, the rigid support member is provided with a threading hole extending in the direction away from the hose body, and the same rigid support member is provided with at least two threading holes, and the plurality of threading holes are arranged symmetrically along the circumference of the hose body.

[0024] The threading holes of the plurality of rigid support members are aligned in the vertical direction.

[0025] According to the above technical solution, the flexible connecting hose of the present invention is connected to the compressed air source, and the purge mechanism is connected to the flexible connecting hose. Therefore, compressed air can be provided to the purge mechanism through the flexible connecting hose. The compressed air is blown into the catalytic reaction ventilation holes to clear the blockage in the catalytic reaction ventilation holes.

[0026] Preferably, the dust cleaning pressure is controlled at 0.4-0.6 MPa. The compressed air pressure is used to purge the dust accumulated in the catalytic reaction vents. Under the pressure of the compressed air, the accumulated dust is blown upward along the catalytic reaction vents into the sealed cover. Since the sealed cover is connected to the dust collector, the accumulated dust will quickly enter the dust collector through the dust collection pipe.

[0027] Thus, the dust cleaning device can use compressed air to clean the catalytic reaction vents of the catalyst and remove dust in time to avoid secondary blockage. The dust cleaning device uses compressed air to clean the catalytic reaction vents without causing damage to the catalytic reaction vents.

[0028] By adjusting the cleaning pressure, blockages in the catalytic reaction vents can be reliably cleared. When the blockage in the catalytic reaction vents is severe, the cleaning pressure can be increased to achieve better cleaning results.

[0029] At the same time, the catalyst's unblocking condition can be judged by comparing the amount of compressed air sent in by the purge mechanism with the amount of dust-containing air extracted by the dust collecting mechanism. If the difference between the two is not large, it means that the catalyst's unblocking effect is good and the compressed air can pass through the catalyst smoothly. If the difference between the two is large, it means that there is still obvious blockage in the catalyst, and the cleaning pressure can be appropriately increased or the compressed air blowing time can be extended.

[0030] Because catalysts are typically large and modular, a cleaning device can be designed to accommodate each catalyst module. Cleaning can be performed one module at a time, moving from one module to the next. This ensures complete cleaning of the catalyst while reducing the size of the cleaning device. This reduces the amount of compressed air required per unit time, thereby reducing the size of the flexible connecting hoses and enhancing the negative pressure dust collection efficiency of the dust collector.

[0031] The dust cleaning device is sized to fit a catalyst module, allowing it to clean each catalyst module in turn. During use, the purge mechanism and dust collection mechanism simply need to be moved to align with different catalyst modules. Since one end of the flexible connecting hose is connected to the compressed air source and the other end to the purge mechanism, setting the flexible connecting hose long enough allows the purge mechanism to have a larger range of movement, thereby achieving coverage of all catalyst modules.

[0032] Similarly, one end of the dust collecting pipe is connected to the dust collector, and the other end is connected to the sealing cover. The dust collecting mechanism can cover all catalyst modules by simply setting the dust collecting pipe to be long enough.

[0033] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following detailed description, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0035] Figure 1 It is a schematic diagram of the working state of a dust cleaning device;

[0036] Figure 2 It is a schematic diagram of a purge mechanism;

[0037] Figure 3 It is a top view of a purge mechanism;

[0038] Figure 4 It is a structural diagram of a flexible connecting hose;

[0039] Figure 5 It is a schematic diagram of the relative positions of two adjacent rigid supports of a flexible connecting hose;

[0040] Figure 6 It is a structural diagram of a flexible connecting hose;

[0041] Figure 7 yes Figure 3 Schematic cross-section of .

[0042] Description of Reference Numerals

[0043] 11 Hose body 12 Rigid support

[0044] 13 Connector 1 Flexible connecting hose

[0045] 14 threading holes 2 purge mechanism

[0046] 32 dust collecting pipe 31 sealing cover

[0047] 33 dust collector 4 compressed air source

[0048] 21 purge pipe 22 compressed air storage chamber

[0049] 23 filter cotton layer 24 pressure equalizing layer DETAILED DESCRIPTION

[0050] The following describes the specific embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0051] In the present invention, unless otherwise stated, the directional words contained in the terms "two ends, symmetrical, parallel, circumferential, below, above, both sides" merely represent the orientation of the term in normal use, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term.

[0052] See also Figure 5 The dust cleaning device further comprises a purge mechanism 2 located below the catalyst and a dust collecting mechanism located above the catalyst, the inlet of the purge mechanism 2 being connected to the flexible connecting hose 1, and the outlet of the purge mechanism 2 being connected to the catalyst module for blowing compressed air into the catalytic reaction ventilation holes of the catalyst;

[0053] The dust collecting mechanism includes a sealing cover 31 and a dust collecting pipe 32 connected to the sealing cover 31 . The sealing cover 31 seals the upper surface of the catalyst, and dust enters the dust collector 33 from the sealing cover 31 through the dust collecting pipe 32 .

[0054] Through the implementation of the above technical solution, the flexible connecting hose 1 is connected to the compressed air source 4, and the purge mechanism 2 is connected to the flexible connecting hose 1. Therefore, compressed air can be provided to the purge mechanism 2 through the flexible connecting hose 1. The compressed air is blown into the catalytic reaction ventilation holes to clear the blockage in the catalytic reaction ventilation holes.

[0055] Preferably, the cleaning pressure is controlled at 0.4-0.6 MPa. The compressed air pressure is used to purge the accumulated dust in the catalytic reaction vents. Under the pressure of the compressed air, the accumulated dust is blown upward along the catalytic reaction vents into the sealing cover 31. Since the sealing cover 31 is connected to the dust collector 33, the accumulated dust will quickly enter the dust collector 33 through the dust collection pipe 32.

[0056] Thus, the dust cleaning device can use compressed air to clean the catalytic reaction vents of the catalyst and remove dust in time to avoid secondary blockage. The dust cleaning device uses compressed air to clean the catalytic reaction vents without causing damage to the catalytic reaction vents.

[0057] By adjusting the cleaning pressure, blockages in the catalytic reaction vents can be reliably cleared. When the blockage in the catalytic reaction vents is severe, the cleaning pressure can be increased to achieve better cleaning results.

[0058] At the same time, by comparing the amount of compressed air sent in by the purge mechanism 2 with the amount of dust-containing air extracted by the dust collecting mechanism, the catalyst's unblocking condition can also be judged. If the difference between the two is not large, it means that the catalyst's unblocking effect is good and the compressed air can pass through the catalyst smoothly. If the difference between the two is large, it means that there is still obvious blockage in the catalyst, and the cleaning pressure can be appropriately increased or the compressed air blowing time can be extended.

[0059] Because catalysts are typically large and modular, a dust cleaning device can be configured to accommodate a single catalyst module. Cleaning can be performed one module at a time, moving from one module to the next. This ensures complete cleaning of the catalyst while reducing the size of the dust cleaning device. Reducing the size of the dust cleaning device can reduce the amount of compressed air input per unit time, thereby reducing the size of the flexible connecting hose 1 and enhancing the negative pressure dust collection efficiency of the dust collector 33.

[0060] The dust cleaning device is set to a size that is suitable for each catalyst module, so that the dust cleaning device can clean each catalyst module in turn. During use, it is only necessary to move the purge mechanism 2 and the dust collection mechanism to align with different catalyst modules. Since one end of the flexible connecting hose 1 is connected to the compressed air source 4 and the other end is connected to the purge mechanism 2, by setting the flexible connecting hose 1 to be long enough, the purge mechanism 2 can have a larger range of movement, thereby achieving coverage of all catalyst modules.

[0061] Similarly, one end of the dust collecting pipe 32 is connected to the dust collector 33, and the other end is connected to the sealing cover 31. The dust collecting mechanism can cover all catalyst modules by simply setting the dust collecting pipe 32 to be long enough.

[0062] In this embodiment, preferably, the purge mechanism 2 includes a plurality of purge pipes 21 , and the plurality of purge pipes 21 are arranged in one-to-one correspondence with the catalytic reaction ventilation holes of the catalyst.

[0063] In order to improve the cleaning efficiency of the cleaning device, a purge pipe 21 can be provided on the side of the purge mechanism 2 facing the catalyst. Multiple purge pipes 21 are provided, and multiple purge pipes 21 correspond one-to-one to the catalytic reaction ventilation holes. Each purge pipe 21 purges each catalytic reaction ventilation hole, which can effectively improve the cleaning efficiency of the cleaning device.

[0064] Preferably, the purge pipe 21 is at least partially inserted into the catalytic reaction vent hole so that the compressed air flowing out of the purge pipe 21 can all act on the catalytic reaction vent hole, avoiding the escape of compressed air during the purge process and improving the cleaning effect of the compressed air on the catalytic reaction vent hole.

[0065] In this embodiment, preferably, the purging device further includes a compressed air storage chamber 22 , and the flexible connecting hose 1 and the purging pipe 21 are respectively located on both sides of the compressed air storage chamber 22 .

[0066] The compressed air in the compressed air source 4 is introduced into the compressed air storage chamber 22 , where the compressed air can be stored.

[0067] Multiple filter cotton layers are also provided in the compressed air storage chamber 22. The multiple filter cotton layers are arranged along the height direction of the compressed air storage chamber 22. The multiple filter cotton layers are located in the compressed air storage chamber 22 near the purge tube 21. The distance between two adjacent filter cotton layers becomes smaller as the distance between the filter cotton layer and the purge tube 21 becomes smaller.

[0068] After the compressed air enters the compressed air storage chamber 22, it will be blocked by the filter cotton layer farthest from the purge pipe 21, so that the compressed air can be dispersed in the compressed air storage chamber 22 to achieve the effect of pressure uniformity. Preferably, by setting multiple filter cotton layers, the compressed air can be gradually dispersed to the surroundings in the process of moving toward the purge pipe 21, thereby achieving the effect of gradually uniformizing the pressure of the compressed air in the compressed air storage chamber 22, so that the pressure of the compressed air entering multiple purge pipes 21 is uniform and reliable.

[0069] Therefore, by providing the compressed air storage chamber 22, a reliable cleaning effect can be achieved on all catalytic reaction ventilation holes in the catalyst module, thereby ensuring the cleaning effect of the cleaning device on the catalyst.

[0070] Preferably, compressed air can pass through the bottom of the compressed air storage chamber 22 only at the position connected to the purge pipe 21, and other positions where the purge pipe 21 is not set are set to be unable to pass through compressed air. In this way, the pressure and flow of the compressed air in the purge pipe 21 can be increased, which is beneficial to improving the blowing effect of the compressed air.

[0071] The present invention also provides a method for using a dust cleaning device, which is characterized by comprising:

[0072] Step 1: Move the purge mechanism 2 and the dust collecting mechanism to the target catalyst module;

[0073] Step 2: Connect the flexible connecting hose 1 to the compressed air source 4, and connect the dust collecting pipe 32 to the dust collector 33;

[0074] Step 3: Compressed air is used to purge the catalyst, and the dust collector 33 collects the dust;

[0075] Step 4: After the through-hole rate reaches the requirement, stop the compressed air purge;

[0076] Step 5: Transfer the purge mechanism 2 and the dust collection mechanism to the next catalyst module and repeat steps 2-4.

[0077] Through the implementation of the above technical solution, the purge mechanism 2 and the dust collecting mechanism are first moved to the target catalyst module, and the purge mechanism 2 and the dust collecting mechanism are respectively located below and above the target catalyst, the flexible connecting hose 1 is connected to the compressed air source 4, the dust collecting pipe 32 is connected to the dust collector 33, the compressed air source 4 is turned on, and high-pressure air is provided to the purge mechanism 2 through the compressed air source 4, and the dust collecting pipe 32 is started at the same time to form a negative pressure between the sealing cover 31 and the catalyst.

[0078] The purge pipe 21 extends into the catalytic reaction vent and delivers high-pressure gas into the catalytic reaction vent. The pressure and momentum of the high-pressure gas are used to clear the blockage in the catalytic reaction vent. Once the blockage in the catalytic reaction vent is cleared, the dust in the catalytic reaction vent will move along the catalytic reaction vent to the top of the catalyst. This dust will be captured in the sealing cover 31 and eventually enter the dust collector 33. By providing a dust collection mechanism, the dust above the catalyst can be cleaned, preventing this dust from re-entering the catalyst module and causing secondary blockage of the catalyst module.

[0079] When the through-porosity of the catalyst module reaches more than 90%, the compressed air blowing can be stopped, and the dust collector 33 can also be stopped. Next, the blowing mechanism 2 and the dust collecting mechanism are transferred to the next catalyst module, and steps 2-4 are repeated to realize the cleaning operation of the next catalyst module until all the catalyst modules are cleaned, that is, the cleaning operation of the catalyst module is completed.

[0080] In this embodiment, preferably, the dust collecting pipe 32 is configured as a metal-wrapped plastic hose.

[0081] Since the dust collecting mechanism is in a negative pressure state when the dust collector 33 is working, in order to prevent the atmospheric pressure from flattening the dust collecting pipe 32 and affecting the permeability of the dust-containing gas in the dust collecting pipe 32, the dust collecting pipe 32 is set to be a metal-wrapped plastic hose, and the strength of the metal is used to maintain the shape of the dust collecting pipe 32 to ensure the permeability of the dust collecting pipe 32.

[0082] In this embodiment, preferably, the dust collecting pipe 32 and the flexible connecting hose 1 are respectively provided with flow meters.

[0083] The permeability can be determined by detecting the displayed values ​​of the two flow meters. The flow meter of the flexible connecting hose 1 displays the amount of compressed air entering the purge mechanism 2, while the flow meter on the dust collecting pipe 32 displays the flow rate of the gas flowing out of the catalyst. If all the catalytic reaction vents in the catalyst have been unblocked, then the value of the flow meter on the dust collecting pipe 32 should be approximately equal to the value displayed by the flow meter of the flexible connecting hose 1, that is, all the compressed air entering the catalyst has flowed out. However, if there are still blocked catalytic reaction vents in the catalyst, then at least a portion of the compressed air in the catalytic reaction vents is blocked and does not enter the dust collecting pipe 32. Therefore, at this time, the value of the flow meter on the dust collecting pipe 32 should be less than the value displayed by the flow meter of the flexible connecting hose 1. A preset reference value is set. When the difference between the values ​​displayed by the two flow meters is greater than the reference value, it can be determined that the catalyst has not been cleared to the ideal state. When the difference between the values ​​displayed by the two flow meters is less than the reference value, it can be determined that the catalyst has been cleared to the ideal state.

[0084] Preferably, the preset reference value corresponds to a state where the catalyst is 90% unblocked. When the catalyst is 90% unblocked, the reference value is the difference between the value displayed by the flow meter on the flexible connecting hose 1 and the value displayed by the flow meter on the dust collecting pipe 32. During operation of the dust cleaning device, the difference between the value displayed by the flow meter on the flexible connecting hose 1 and the value displayed by the flow meter on the dust collecting pipe 32 is compared with the reference value, and the operation of the dust cleaning device is controlled based on the comparison result, thereby cleaning the catalyst until the catalyst module's through-hole ratio reaches above 90%.

[0085] See also Figure 4-7 The flexible connecting hose shown includes a hose body 11, a rigid support member 12, and connectors 13 located at both ends of the hose body 11. The rigid support member 12 is fixedly connected to the hose body 11.

[0086] A plurality of rigid support members 12 are provided, and the plurality of rigid support members 12 are fixedly arranged along the length direction of the hose body 11 . Under the action of the rigid support members 12 , the relative rotation angle between the connectors 13 at both ends of the flexible hose 1 is no more than 180°.

[0087] By implementing the above technical solution, by fixedly connecting the rigid support member 12 to the hose body 11, the rigid support member 12 provides the hose body 11 with multiple relatively fixed points, which can limit the range of motion of the hose body 11. Therefore, by fixedly connecting the hose body 11 to the rigid support member 12, the space for free movement of the rigid support member 12 can be reduced, thereby reducing the possibility of entanglement of the flexible hose 1.

[0088] The multiple rigid supports 12 are used to maintain the position and shape of the hose body 11 connected thereto. The interaction between two adjacent rigid supports 12 and the limited spacing between them can, to a certain extent, control the range of motion of the hose body 11 between the two adjacent rigid supports 12, ensuring that the relative rotation angle between the connectors 13 at both ends of the flexible connecting hose 1 does not exceed 180°. This means that the flexible connecting hose 1 has a certain degree of overall flexibility along its length, while also preventing the hose body 11 from becoming entangled.

[0089] In this embodiment, preferably, the rigid support member 12 is configured to be elliptical, and two adjacent elliptical rigid support members 12 are symmetrically arranged with respect to the cross section of the flexible connecting hose 1 .

[0090] like Figure 4-5 As shown, when the hose body 11 is in the expanded state, its cross-section is circular, and the rigid support members 12 are located at the oblique cross-section of the hose body 11. Two adjacent rigid support members 12 are symmetrically arranged. Since the rigid support members 12 themselves are not easily deformed, when the hose body 11 needs to be twisted, the oblique cross-section of the hose body 11 is supported by the rigid support members 12 along the height direction of the rigid support members 12. Therefore, the flexible connecting hose 1 is not easily rotated along its circumferential direction, and therefore, the flexible connecting hose 1 is not easily entangled.

[0091] In order to ensure that the flexible connecting hose 1 still has a certain degree of flexibility in the height direction, a certain gap needs to be set between two adjacent rigid support members 12. By utilizing this gap, the flexible connecting hose 1 can bend in the height direction to adapt to the movement of the cleaning device along the lower surface of the catalyst.

[0092] Preferably, the gap between two adjacent rigid support members 12 should not be too large to prevent the hose body 11 from being entangled between the two adjacent rigid support members 12 .

[0093] In this embodiment, preferably, the rigid support members 12 are arranged in a circular shape, and two adjacent circular rigid support members 12 are arranged in parallel.

[0094] See also Figure 6-7 As shown, a circular rigid support member 12 is provided at the cross section of the hose body 11 and is fixedly connected to the cross section of the hose body 11 , so that the hose body 11 can maintain a fixed position at the position where it is connected to the rigid support member 12 .

[0095] In this embodiment, preferably, the rigid support member 12 is provided with a threading hole 14 extending in a direction away from the hose body 11, and the same rigid support member 12 is provided with at least two threading holes 14, and the plurality of threading holes 14 are rotationally symmetrically arranged along the circumference of the hose body 11;

[0096] The threading holes 14 of the plurality of rigid support members 12 are aligned in the vertical direction.

[0097] To prevent the rigid support member 12 from rotating circumferentially along the hose body 11 and causing entanglement in the flexible connector hose 1, threading holes 14 are provided on the rigid support member. During use, flexible material is sequentially passed through multiple vertically aligned threading holes 14, thereby stringing the rigid support members 12 from top to bottom. Multiple flexible materials are provided corresponding to the multiple threading holes of each rigid support member 12, and the multiple flexible materials are arranged parallel to each other, thereby preventing the rigid support member 12 from rotating circumferentially along the hose body 11 and thus preventing entanglement in the hose body 11.

[0098] The flexible connecting hose 1 is able to bend without being entangled by using the flexible material to pass through the rigid support member 12 .

[0099] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0100] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0101] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A dust cleaning device, characterized in that: The dust cleaning device comprises a purge mechanism (2) located below the catalyst and a dust collecting mechanism located above the catalyst, the inlet of the purge mechanism (2) being connected to the flexible connecting hose (1), and the outlet of the purge mechanism (2) being connected to the catalyst module for blowing compressed air into the catalytic reaction ventilation hole of the catalyst; The dust collecting mechanism comprises a sealing cover (31) and a dust collecting pipe (32) connected to the sealing cover (31). The sealing cover (31) seals the upper surface of the catalyst, and dust enters the dust collector (33) from the sealing cover (31) through the dust collecting pipe (32).

2. The dust cleaning device according to claim 2, characterized in that: The purge mechanism (2) comprises a plurality of purge pipes (21), and the plurality of purge pipes (21) are arranged in one-to-one correspondence with the catalytic reaction ventilation holes of the catalyst.

3. The dust cleaning device according to claim 2, characterized in that: The purging device further comprises a compressed air storage chamber (22), and the flexible connecting hose (1) and the purging pipe (21) are respectively located on both sides of the compressed air storage chamber (22).

4. A method for using the dust cleaning device according to any one of claims 1 to 3, characterized in that: include: Step 1: Move the purge mechanism (2) and the dust collection mechanism to the target catalyst module; Step 2: Connect the flexible connecting hose (1) to the compressed air source (4), and connect the dust collecting pipe (32) to the dust collector (33); Step 3: The catalyst is purged with compressed air, and the dust collector (33) collects the dust; Step 4: After the through-hole rate reaches the requirement, stop the compressed air purge; Step 5: Transfer the purge mechanism (2) and the dust collection mechanism to the next catalyst module and repeat steps 2-4.

5. The method of use according to claim 4, characterized in that: The dust collecting pipe (32) is configured as a metal-wound plastic hose.

6. The method of use according to claim 4, characterized in that: The dust collecting pipe (32) and the flexible connecting hose (1) are respectively provided with flow meters.

7. A flexible connecting hose, characterized in that: It comprises a hose body (11), a rigid support member (12) and connecting members (13) located at both ends of the hose body (11), wherein the rigid support member (12) is fixedly connected to the hose body (11); A plurality of rigid support members (12) are provided, and the plurality of rigid support members (12) are fixedly arranged along the length direction of the hose body (11). Under the action of the rigid support members (12), the relative rotation angle between the connecting members (13) at both ends of the flexible hose (1) is no more than 180 degrees.

8. The flexible connecting hose according to claim 7, characterized in that: The rigid support member (12) is arranged in an elliptical shape, and two adjacent elliptical rigid support members (12) are symmetrically arranged with respect to the cross section of the flexible connecting hose (1).

9. The flexible connecting hose (1) according to claim 7, characterized in that: The rigid support members (12) are arranged in a circular shape, and two adjacent circular rigid support members (12) are arranged in parallel.

10. The flexible connecting hose (1) according to claim 9, characterized in that: The rigid support member (12) is provided with a threading hole (14) extending in a direction opposite to the hose body (11), and the same rigid support member (12) is provided with at least two threading holes (14), and the plurality of threading holes (14) are arranged rotationally symmetrically along the circumference of the hose body (11). The threading holes (14) of the plurality of rigid support members (12) are aligned in the vertical direction.

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