A system and method for multiphase medium sootblowing of denitrification catalyst

Abstract

The present application relates to the technical field of industrial flue gas denitration, and more particularly to a multiphase medium soot blowing system and method for denitration catalysts; the system comprises a cleaning trolley, the cleaning trolley is connected to a dry ice cleaning system and a high-pressure gas soot blowing system through pipelines, the cleaning trolley is connected to an electric control system, the cleaning trolley is driven to be arranged between two supports, the cleaning trolley is arranged on a plurality of catalyst modules, and the cleaning trolley drives the dry ice cleaning system and the high-pressure gas soot blowing system to clean the plurality of catalyst modules; the present application has the beneficial effect of providing a multiphase medium soot blowing system, adopting a method of high-pressure gas and dry ice particle composite soot blowing to remove the accumulated ash in the catalyst pores and micropores, and compared with wet soot blowing, the method does not damage the catalyst structure and avoids the loss of active components.

Description

Technical Field

[0001] This invention relates to the field of industrial flue gas denitrification technology, and more specifically to a multiphase media soot blowing system and method for denitrification catalysts. Background Technology

[0002] With increasingly stringent environmental protection requirements, most industries such as power, steel, chemicals, and building materials are adopting SCR (Selective Catalytic Reduction) technology for NOx reduction in flue gas. The core of SCR technology is the catalyst, which can be categorized into honeycomb, plate, and corrugated plate types. Flue gas contains a large amount of fly ash, and toxic substances such as sulfur and ammonia generated at low temperatures can easily clog the catalyst surface and pores.

[0003] SCR denitrification systems are typically equipped with soot blowers that use steam or compressed air as the medium. However, these soot blowers can only remove dust accumulated on the catalyst surface and are less efficient at removing dust that has already clogged the catalyst channels. Therefore, the denitrification catalyst needs to be cleaned and regenerated periodically.

[0004] Similar to the precision sootblowing system for eliminating blind spots in the boiler (patent number CN202011022294.X), this invention utilizes existing steam sootblower systems with wind-cap type steam sootblowers to precisely eliminate blind spots. The system includes: a steam header connected to the boiler's existing steam sootblowing pipeline for introducing sootblowing steam; multiple wind-cap type sootblowers positioned in the blind spots of the boiler's horizontal flue; and at least one steam distribution pipe, with its inlet connected to the steam header and its outlet connected to the multiple wind-cap type sootblowers. The steam header is equipped with a sootblowing electric valve and a check valve. The electric valve is located between the inlet of the steam header and the nearest steam distribution pipe, and the check valve is located between the outlet of the steam header and the nearest steam distribution pipe. This invention effectively solves the problem of blind spots in traditional steam sootblower systems by precisely eliminating these blind spots.

[0005] Commonly used wet cleaning methods, such as high-pressure water washing, chemical cleaning, and ultrasonic cleaning, are employed to remove dust accumulation within catalyst pores. However, these methods can easily damage the catalyst structure, leading to irreversible degradation and loss of active components. Furthermore, they are inefficient at removing dust trapped in micropores. Therefore, there is a need to develop a dust removal method that offers superior cleaning performance without damaging the catalyst for practical applications. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the shortcomings of wet cleaning in the prior art. By proposing a multiphase medium cleaning system, a composite cleaning method of high pressure gas and dry ice particles is used to remove the accumulated dust in the catalyst channels and micropores. Compared with wet cleaning, it does not damage the catalyst structure and avoids the loss of active components.

[0007] Therefore, the technical solution adopted is a multiphase media soot blowing system for denitrification catalysts according to the present invention, including a cleaning trolley, which is connected to a dry ice cleaning system and a high-pressure gas cleaning system through pipelines; the cleaning trolley is electrically connected to the control system, the cleaning trolley drive is set between two supports, the cleaning trolley is set on multiple catalyst modules, and the cleaning trolley drives the dry ice cleaning system and the high-pressure gas cleaning system to clean the multiple catalyst modules.

[0008] Preferably, the high-pressure gas cleaning system includes a high-pressure gas cleaning pipe, a high-pressure gas storage tank, valves, and flow meters. The high-pressure gas cleaning pipe is connected to and communicates with the high-pressure gas storage tank, and multiple valves and flow meters are installed on the high-pressure gas cleaning pipe.

[0009] Preferably, the dry ice cleaning system includes a dry ice cleaning pipe, a dry ice storage tank, valves, and flow meters. The dry ice cleaning pipe is connected to and communicates with the dry ice storage tank, and multiple valves and flow meters are installed on the dry ice cleaning pipe.

[0010] Preferably, the ends of the dry ice cleaning tube and the high-pressure gas cleaning tube are both fixed inside the cleaning trolley, and the ends of the dry ice cleaning tube and the high-pressure gas cleaning tube are provided with multiple blowing holes inside the cleaning trolley.

[0011] Preferably, the two supports are symmetrically arranged, and each support is longitudinally inserted with a longitudinal adjustment platform. Two longitudinal adjustment screws are rotatably arranged on each of the two longitudinal adjustment platforms, and the two longitudinal adjustment screws are respectively connected to the two supports by threaded engagement.

[0012] Preferably, the two longitudinal adjustment platforms are respectively provided with a transport drive motor and a bearing housing. The transmission shaft of the transport drive motor is connected to the drive connection center screw through a coupling. The drive connection center screw is rotatably connected in the bearing housing.

[0013] Preferably, the drive connection center screw includes multiple connecting screws, which are connected to each other by internal screws.

[0014] Preferably, the cleaning trolley is fixed with screw hole supports at both ends, and two fixed tapered screw holes are provided in the screw hole supports. A central threaded hole is provided at the middle end of the screw hole support. Both fixed tapered screw holes are connected to the interior of the cleaning trolley. A dry ice cleaning tube and a high-pressure gas cleaning tube are respectively inserted into the two fixed tapered screw holes. The ends of the dry ice cleaning tube and the high-pressure gas cleaning tube are respectively connected to the two fixed tapered screw holes through tapered screw end caps.

[0015] The cleaning trolley is equipped with multiple rotating hubs that are rotatably mounted on a rotating shaft, and multiple side rotating wheels are rotatably mounted on the side end of the cleaning trolley via a short shaft.

[0016] The cleaning trolley has multiple air outlets at its upper and lower ends, and sealing plates are inserted into the air outlets. The sealing plates are connected to the upper or lower end of the cleaning trolley by bolts.

[0017] The cleaning trolley has a central hole connecting platform inside. The two ends of the central hole connecting platform are respectively connected to the central threaded holes of two screw hole supports. The central hole connecting platform and the two central threaded holes are connected to the central screw rod through threaded engagement.

[0018] Preferably, the moving speed of the cleaning trolley is 0.1-0.5 m / min; the particle size of the dry ice in the dry ice storage tank is 0.01-10 mm; and the high-pressure gas in the high-pressure gas storage tank is compressed air, nitrogen, or steam, with a gas pressure of 0.2-4 MPa.

[0019] A method for a multiphase media soot blowing system for denitrification catalysts includes the following steps:

[0020] S1: Arrange multiple catalyst modules side by side between two supports, and place the cleaning trolley on the multiple catalyst modules;

[0021] S2: By connecting the cleaning trolley to the dry ice cleaning system and the high-pressure gas cleaning system, the cleaning mode is selected according to the catalyst blockage.

[0022] S3: The dry ice cleaning mode is operated by controlling the cleaning trolley and the dry ice cleaning system through the control system.

[0023] S4: The high-pressure gas cleaning mode is performed by controlling the cleaning trolley and the high-pressure gas cleaning system through the control system.

[0024] S5: The system controls the cleaning trolley, dry ice cleaning system, and high-pressure gas cleaning system to perform a combined high-pressure gas and dry ice cleaning mode.

[0025] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in this application.

[0026] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0028] Figure 1This is a schematic diagram of the structure of the multiphase media soot blowing system for denitrification catalysts of the present invention;

[0029] Figure 2 This is a schematic diagram of the overall structure of the soot blowing system of the present invention. Figure 1 ;

[0030] Figure 3 This is a schematic diagram of the overall structure of the soot blowing system of the present invention. Figure 2 ;

[0031] Figure 4 This is a schematic diagram of the connection structure between the bracket and the cleaning cart of the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of the bracket of the present invention;

[0033] Figure 6 This is a schematic diagram of the drive structure of the cleaning cart of the present invention;

[0034] Figure 7 This is a schematic diagram of the structure of the cleaning cart of the present invention. Figure 1 ;

[0035] Figure 8 This is a schematic diagram of the structure of the cleaning cart of the present invention. Figure 2 ;

[0036] Figure 9 This is a schematic diagram of the dry ice cleaning tube and high-pressure gas cleaning tube of the present invention;

[0037] Figure 10 This is a schematic diagram of the air outlet structure of the cleaning cart of the present invention. Figure 1 ;

[0038] Figure 11 This is a schematic diagram of the air outlet structure of the cleaning cart of the present invention. Figure 2 ;

[0039] Figure 12 This is a schematic diagram of the air outlet structure of the cleaning cart of the present invention. Figure 3 ;

[0040] Figure 13 This is a comparison diagram of the tilting effect used in the soot blowing system of the present invention.

[0041] In the diagram: 1. Control system; 2. Support; 3. Dry ice cleaning system; 4. High-pressure gas cleaning system; 5. Cleaning trolley; 6. Dry ice cleaning pipe; 7. High-pressure gas cleaning pipe; 8. Valve; 9. Flow meter; 10. Longitudinal adjusting table; 11. Longitudinal adjusting screw; 12. Conveyor drive motor; 13. Drive connection center screw; 14. Screw hole support; 15. Sealing plate; 16. Fixed tapered screw hole; 17. Center threaded hole; 18. Rotating hub; 19. Side rotating wheel; 20. Air outlet; 21. Center hole connecting table. Detailed Implementation

[0042] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] In the description of this application, it should be understood that the terms "middle," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Specific implementation method one:

[0047] like Figure 1 and Figure 2As shown, a multiphase media soot blowing system for denitrification catalysts includes a cleaning trolley 5, which is connected to a dry ice cleaning system 3 and a high-pressure gas cleaning system 4 via pipelines. The cleaning trolley 5 is electrically connected to a control system 1. The cleaning trolley 5 is driven and positioned between two supports 2. The cleaning trolley 5 is mounted on multiple catalyst modules. The cleaning trolley 5 drives the dry ice cleaning system 3 and the high-pressure gas cleaning system 4 to clean the multiple catalyst modules.

[0048] The working principle and beneficial effects of this embodiment are as follows: multiple catalyst modules are arranged side by side between two supports 2, and a cleaning trolley 5 is placed on the multiple catalyst modules; by connecting and linking the cleaning trolley 5 with the dry ice cleaning system 3 and the high-pressure gas cleaning system 4, the cleaning mode is selected according to the catalyst blockage; the cleaning trolley 5 and the dry ice cleaning system 3 are operated and controlled by the control system 1 to perform the dry ice cleaning mode; the cleaning trolley 5 and the high-pressure gas cleaning system 4 are operated and controlled by the control system 1 to perform the high-pressure gas cleaning mode; the cleaning trolley 5, the dry ice cleaning system 3, and the high-pressure gas cleaning system 4 are operated and controlled by the control system 1 to perform the high-pressure gas plus dry ice combined cleaning mode.

[0049] The control system can execute the program multiple times to clean the catalyst based on its blockage status; taking a honeycomb catalyst as an example, one module contains 72 catalyst monomers, with dimensions of length × width × height.

[0050] 1910×970×1000mm; High-pressure gas + dry ice cleaning mode is adopted. The high-pressure gas source is compressed air with a pressure of 0.2-2.0MPa, and the dry ice particle size is <0.5mm. The cleaning trolley 5 is placed above the catalyst module, with the cleaning pipe 50-500mm away from the catalyst module surface. At the start of cleaning, valve 8 of the high-pressure gas cleaning pipe 7 of the high-pressure gas cleaning system 4 is opened, allowing high-pressure gas to enter (the dry ice cleaning pipe valve is closed). The cleaning trolley 5 moves from one side of the catalyst module to the other at a speed of 0.1-0.5m / min. When it reaches the other side of the catalyst, valve 8 of the high-pressure gas cleaning pipe 7 is automatically closed, and valve 8 of the dry ice cleaning pipe 7 is opened, allowing dry ice particles to enter. Simultaneously, the cleaning trolley moves from side B of the catalyst module to side A. When the cleaning trolley reaches side A, the dry ice cleaning pipe valve is automatically closed.

[0051] The dust removal process can be repeated multiple times depending on catalyst blockage and dust removal effect; the dust collected by the dust collection system is transported to the hazardous waste storage in ton bags;

[0052] The dust collection system includes dust collection devices, dust unloading devices, and packaging bags for use.

[0053] The effect of catalyst before and after cleaning is as follows Figure 13As shown, the ash buildup in the catalyst pores was almost completely removed. Analysis of the catalyst's specific surface area revealed improvements in both the specific surface area and pore volume after ash removal, as shown in the table below:

[0054] Sample Name <![CDATA[BETm 3 / g]]> pore volume (ml / g) <![CDATA[Aperture cm 4 / g]]> Before cleaning 33.7364 0.1987 23.5598 After cleaning 39.7483 0.2486 21.9973

[0055] Catalyst specific surface area and pore structure before and after descaling

[0056] This system uses a combination of high-pressure gas and dry ice particles for cleaning to remove the accumulated dust in the catalyst channels and micropores. Compared with wet cleaning, it does not damage the catalyst structure and avoids the loss of active components. Specific Implementation Method Two:

[0058] like Figure 1 — Figure 13 As shown, a multiphase media soot blowing system and method for denitrification catalysts is disclosed. The high-pressure gas cleaning system 4 includes a high-pressure gas cleaning pipe 7, a high-pressure gas storage tank, valves 8 and flow meters 9. The high-pressure gas cleaning pipe 7 is connected to and communicates with the high-pressure gas storage tank. Multiple valves 8 and flow meters 9 are installed on the high-pressure gas cleaning pipe 7.

[0059] The working principle and beneficial effects of this embodiment are as follows: the high-pressure gas cleaning pipe 7 of the high-pressure gas cleaning system 4 is connected to the cleaning trolley 5 for use. The high-pressure gas storage tank, valve 8 and flow meter 9 can be conveniently and automatically controlled by the control system 1. The high-pressure gas in the high-pressure gas storage tank is compressed air, nitrogen or steam, etc., with a gas pressure of 0.2-4MPa, and the high-pressure gas cleaning mode is used. Specific implementation method three:

[0061] like Figure 1 — Figure 13 As shown, a multiphase media soot blowing system and method for denitrification catalysts is disclosed. The dry ice cleaning system 3 includes a dry ice cleaning pipe 6, a dry ice storage tank, valves 8 and flow meters 9. The dry ice cleaning pipe 6 is connected to and communicates with the dry ice storage tank. Multiple valves 8 and flow meters 9 are installed on the dry ice cleaning pipe 6.

[0062] The working principle and beneficial effects of this embodiment are as follows: the dry ice cleaning pipe 6 of the dry ice cleaning system 3 is connected to the cleaning cart 5 for use. The dry ice storage box, valve 8 and flow meter 9 facilitate automatic operation through the control system 1. The length of the pipeline from the dry ice storage box to the dry ice cleaning pipe 6 is 1-10m. The particle size of the dry ice is 0.01-10mm. The dry ice cleaning mode is used. Specific implementation method four:

[0064] like Figure 1 — Figure 13As shown, a multiphase media soot blowing system and method for denitrification catalysts are disclosed. The ends of the dry ice cleaning pipe 6 and the high-pressure gas cleaning pipe 7 are both fixed inside the cleaning trolley 5. The ends of the dry ice cleaning pipe 6 and the high-pressure gas cleaning pipe 7 are provided with multiple blowing holes inside the cleaning trolley 5.

[0065] The working principle and beneficial effects of this embodiment are as follows: Since the ends of the dry ice cleaning pipe 6 and the high-pressure gas cleaning pipe 7 are both fixed inside the cleaning trolley 5, the cleaning trolley 5 can drive the dry ice cleaning pipe 6 and the high-pressure gas cleaning pipe 7 to perform dust removal by displacement. Since the ends of the dry ice cleaning pipe 6 and the high-pressure gas cleaning pipe 7 are provided with multiple blowing holes inside the cleaning trolley 5, it is convenient to use the high-pressure gas and dry ice in a combined dust removal mode. Specific implementation method five:

[0067] like Figure 1 — Figure 13 As shown, a multiphase media soot blowing system and method for denitrification catalysts is disclosed. The two supports 2 are symmetrically arranged, and each of the two supports 2 is longitudinally connected to a longitudinal adjustment platform 10. Each of the two longitudinal adjustment platforms 10 is rotatably mounted with two longitudinal adjustment screws 11, which are respectively connected to the two supports 2 by threaded engagement.

[0068] The working principle and beneficial effects of this embodiment are as follows: the cleaning trolley 5 drives the dry ice cleaning system 3 and the high-pressure gas cleaning system 4 to clean multiple catalyst modules. First, multiple catalyst modules are set between two supports 2. By rotating the two longitudinal adjusting screws 11 on the two supports 2, the height of the two longitudinal adjusting platforms 10 on the two supports 2 is adjusted. By adjusting the height of the two longitudinal adjusting platforms 10, the height of the drive connecting center screw 13 is adjusted, thereby achieving the effect of adjusting the height of the cleaning trolley 5. Specific implementation method six:

[0070] like Figure 1 — Figure 13 As shown, a multiphase media soot blowing system and method for denitrification catalysts are disclosed. The two longitudinal adjustment platforms 10 are respectively equipped with a conveying drive motor 12 and a bearing seat. The transmission shaft of the conveying drive motor 12 is connected to the drive connecting center screw 13 through a coupling. The drive connecting center screw 13 is rotatably connected in the bearing seat.

[0071] The working principle and beneficial effects of this embodiment are as follows: two longitudinal adjustment platforms 10 are respectively equipped with a transport drive motor 12 and a bearing seat. The transport drive motor 12 is driven by the control system 1, which drives the drive connection center screw 13 to rotate in the bearing seat, thereby realizing the displacement of the cleaning trolley 5 on multiple catalyst modules through threaded engagement. Specific implementation method seven:

[0073] like Figure 1 — Figure 13 As shown, a multiphase media soot blowing system and method for denitrification catalysts is disclosed, wherein the driving connecting center screw 13 includes multiple connecting screws, which are connected to each other through an inner screw.

[0074] The working principle and beneficial effects of this embodiment are as follows: the drive connecting center screw 13 is connected by multiple connecting screws, which facilitates adjustment for different lengths, and facilitates assembly for cleaning multiple catalyst modules of different lengths. Detailed implementation method eight:

[0076] like Figure 1 — Figure 13 As shown, a multiphase media soot blowing system and method for denitrification catalysts are disclosed. The cleaning trolley 5 is fixed with screw hole supports 14 at both ends. Two fixed tapered screw holes 16 are provided in the screw hole supports 14. A central threaded hole 17 is provided at the middle end of the screw hole supports 14. Both fixed tapered screw holes 16 are connected to the interior of the cleaning trolley 5. Dry ice cleaning tube 6 and high-pressure gas cleaning tube 7 are respectively inserted into the two fixed tapered screw holes 16. The ends of the dry ice cleaning tube 6 and high-pressure gas cleaning tube 7 are respectively connected to the two fixed tapered screw holes 16 through tapered screw end caps.

[0077] The cleaning trolley 5 is provided with multiple rotating hubs 18 that are rotatably mounted on a rotating shaft, and multiple side rotating wheels 19 are provided on the side end of the cleaning trolley 5 that are rotatably mounted on a short shaft.

[0078] The cleaning trolley 5 is provided with multiple air outlets 20 at its upper and lower ends, and a sealing plate 15 is inserted into the air outlet 20. The sealing plate 15 is connected to the upper or lower end of the cleaning trolley 5 by bolts.

[0079] The cleaning trolley 5 has a central hole connecting platform 21 at its center. The two ends of the central hole connecting platform 21 are respectively connected to the central threaded holes 17 of the two screw hole supports 14. The central hole connecting platform 21 and the two central threaded holes 17 are connected to the central screw 13 through threaded engagement.

[0080] The working principle and beneficial effects of this embodiment are as follows: Two fixed conical screw holes 16 are located within the screw hole supports 14 at both ends of the cleaning trolley 5. Dry ice cleaning tubes 6 and high-pressure gas cleaning tubes 7 are respectively inserted into these two fixed conical screw holes 16. The ends of the dry ice cleaning tubes 6 and high-pressure gas cleaning tubes 7 are connected to the two fixed conical screw holes 16 via conical end caps. The dry ice cleaning tubes 6 and high-pressure gas cleaning tubes 7 are fixed within the cleaning trolley 5. Multiple blowing holes are provided at the ends of both the dry ice cleaning tubes 6 and high-pressure gas cleaning tubes 7 within the cleaning trolley 5. Thus, during the displacement of the cleaning trolley 5, the dry ice cleaning tubes 6 and high-pressure gas cleaning tubes 7 can be used for separate or combined addition of high-pressure gas and dry ice.

[0081] The cleaning trolley 5 is equipped with multiple rotating hubs 18 that are rotatable via a rotating shaft for displacement and cleaning of multiple catalyst modules. Multiple side rotating wheels 19 are also provided on the side of the cleaning trolley 5 via a short shaft, which facilitates displacement in environments with side walls that allow for easy sliding.

[0082] Multiple air outlets 20 are provided at the upper and lower ends of the inner wall of the cleaning trolley 5. When using the lower side alone, a sealing plate 15 is inserted into the upper air outlet 20 to seal the multiple air outlets 20 at the upper end, which facilitates the cleaning of the lower side. Correspondingly, when multiple catalyst modules at the upper height need to be cleaned, the lower air outlets 20 are sealed. When multiple catalyst modules are used side by side, they can be cleaned as a whole at the same time.

[0083] The cleaning trolley 5 has a central hole connecting platform 21 inside. The two ends of the central hole connecting platform 21 are respectively connected to the central threaded holes 17 of the two screw hole supports 14, thereby driving the connecting central screw 13 to engage in the threaded connection within the central hole connecting platform 21 and the two central threaded holes 17, thus realizing the driving of the center to move the cleaning trolley 5. Specific implementation method nine:

[0085] like Figure 1 — Figure 13 As shown, a multiphase media soot blowing system and method for denitrification catalysts is disclosed, wherein the moving speed of the cleaning trolley 5 is 0.1-0.5 m / min; the particle size of the dry ice in the dry ice storage tank is 0.01-10 mm; and the high-pressure gas in the high-pressure gas storage tank is compressed air, nitrogen or steam, with a gas pressure of 0.2-4 MPa.

[0086] The working principle and beneficial effects of this embodiment are as follows: the moving speed of the cleaning trolley 5 is 0.1-0.5 m / min; the particle size of the dry ice in the dry ice storage tank is 0.01-10 mm; the high-pressure gas in the high-pressure gas storage tank is compressed air, nitrogen or steam, and the gas pressure is 0.2-4 MPa. The conditions for use are limited to prevent unnecessary damage to the cleaning of multiple catalyst modules. Specific Implementation Method Ten:

[0088] like Figure 1 — Figure 13 As shown, a method for blowing soot from a multiphase medium in a denitrification catalyst includes the following steps:

[0089] S1: Arrange multiple catalyst modules side by side between two brackets 2, and place the cleaning trolley 5 on the multiple catalyst modules;

[0090] S2: By connecting the cleaning trolley 5 to the dry ice cleaning system 3 and the high-pressure gas cleaning system 4, the cleaning mode is selected according to the catalyst blockage.

[0091] S3: The dry ice cleaning mode is performed by operating the cleaning trolley 5 and the dry ice cleaning system 3 through the control system 1.

[0092] S4: The high-pressure gas cleaning mode is performed by operating the cleaning trolley 5 and the high-pressure gas cleaning system 4 through the control system 1.

[0093] S5: The cleaning trolley 5, dry ice cleaning system 3 and high-pressure gas cleaning system 4 are operated by the control system 1 to perform a high-pressure gas plus dry ice combined cleaning mode.

[0094] The above description is not intended to limit the present invention, nor is the present invention limited to the examples given above. Any changes, modifications, additions, or substitutions made by those skilled in the art within the scope of the present invention are also within the protection scope of the present invention.

Claims

1. A multiphase media soot blowing system for denitrification catalysts, characterized in that: The system includes a cleaning trolley (5), which is connected to a dry ice cleaning system (3) and a high-pressure gas cleaning system (4) via pipes. The cleaning trolley (5) is electrically connected to a control system (1). The cleaning trolley (5) is driven between two supports (2) and is mounted on multiple catalyst modules. The cleaning trolley (5) drives the dry ice cleaning system (3) and the high-pressure gas cleaning system (4) to clean the multiple catalyst modules. The cleaning trolley (5) is fixed with screw hole supports (14) at both ends. Two fixed tapered screw holes (16) are provided in the screw hole supports (14). A central threaded hole (17) is provided in the middle of the screw hole supports (14). The two fixed tapered screw holes (16) are connected to the inside of the cleaning trolley (5). A dry ice cleaning tube (6) and a high-pressure gas cleaning tube (7) are respectively inserted into the two fixed tapered screw holes (16). The ends of the dry ice cleaning tube (6) and the high-pressure gas cleaning tube (7) are respectively connected to the two fixed tapered screw holes (16) through tapered screw end caps. The cleaning trolley (5) is provided with multiple rotating hubs (18) via a rotating shaft, and multiple side rotating wheels (19) are provided on the side end of the cleaning trolley (5) via a short shaft. The cleaning trolley (5) is provided with multiple air outlets (20) at its upper and lower ends respectively. A sealing plate (15) is inserted into the air outlet (20). The sealing plate (15) is sealed to the upper or lower end of the cleaning trolley (5) by bolts. The cleaning trolley (5) has a central hole connecting platform (21) at its center. The two ends of the central hole connecting platform (21) are respectively connected to the central threaded holes (17) of the two screw hole supports (14). The central hole connecting platform (21) and the two central threaded holes (17) are connected to the central screw rod (13) through threaded engagement. The method of using the aforementioned soot blowing system includes the following steps: S1: Place multiple catalyst modules side by side between two supports (2), and place the cleaning trolley (5) on the multiple catalyst modules; S2: By connecting the cleaning trolley (5) to the dry ice cleaning system (3) and the high-pressure gas cleaning system (4), the cleaning mode is selected according to the catalyst blockage. S3: Perform dry ice cleaning on the cleaning cart (5) and the dry ice cleaning system (3); S4: Perform high-pressure gas cleaning on the cleaning trolley (5) and the high-pressure gas cleaning system (4); S5: The cleaning trolley (5), the dry ice cleaning system (3) and the high-pressure gas cleaning system (4) are used for high-pressure gas and dry ice combined cleaning.

2. The multiphase media soot blowing system for denitrification catalysts according to claim 1, characterized in that: The high-pressure gas cleaning system (4) includes a high-pressure gas cleaning pipe (7), a high-pressure gas storage tank, valves (8) and flow meters (9). The high-pressure gas cleaning pipe (7) is connected to and communicates with the high-pressure gas storage tank. Multiple valves (8) and flow meters (9) are installed on the high-pressure gas cleaning pipe (7).

3. A multiphase media soot blowing system for denitrification catalysts according to claim 2, characterized in that: The dry ice cleaning system (3) includes a dry ice cleaning pipe (6), a dry ice storage tank, valves (8) and flow meters (9). The dry ice cleaning pipe (6) is connected to and communicates with the dry ice storage tank. Multiple valves (8) and flow meters (9) are installed on the dry ice cleaning pipe (6).

4. A multiphase media soot blowing system for denitrification catalysts according to claim 3, characterized in that: The ends of the dry ice cleaning tube (6) and the high-pressure gas cleaning tube (7) are both fixed inside the cleaning trolley (5). The ends of the dry ice cleaning tube (6) and the high-pressure gas cleaning tube (7) are provided with multiple blow holes inside the cleaning trolley (5).

5. A multiphase media soot blowing system for denitrification catalysts according to claim 1, characterized in that: The two supports (2) are symmetrically arranged, and each of the two supports (2) is longitudinally inserted with a longitudinal adjustment platform (10). Each of the two longitudinal adjustment platforms (10) is rotatably provided with two longitudinal adjustment screws (11), and the two longitudinal adjustment screws (11) are respectively connected to the two supports (2) by threaded connection.

6. A multiphase media soot blowing system for denitrification catalysts according to claim 5, characterized in that: The two longitudinal adjustment platforms (10) are respectively equipped with a transport drive motor (12) and a bearing seat. The transmission shaft of the transport drive motor (12) is connected to the drive connection center screw (13) through a coupling. The drive connection center screw (13) is rotatably connected in the bearing seat.

7. A multiphase media soot blowing system for denitrification catalysts according to claim 6, characterized in that: The drive connection center screw (13) includes multiple connecting screws, which are connected to each other through an inner screw.

8. A multiphase media soot blowing system for denitrification catalysts according to claim 4, characterized in that: The moving speed of the cleaning trolley (5) is 0.1-0.5 m / min; the particle size of the dry ice in the dry ice storage box is 0.01-10 mm; the high-pressure gas in the high-pressure gas storage tank is compressed air, nitrogen or steam, and the gas pressure is 0.2-4 MPa.

Images