Multi-phase medium soot blowing system and method for denitration catalyst

Abstract

The invention relates to the technical field of industrial flue gas denitration, in particular to a heterogeneous medium soot blowing system and method for a denitration catalyst. Comprising a cleaning trolley which is connected with a dry ice cleaning system and a high-pressure gas ash removal system through pipelines. The cleaning trolley is electrically connected with the control system, the cleaning trolley drive is arranged between the two supports, the cleaning trolley is arranged on the multiple catalyst modules, and the cleaning trolley drives the dry ice cleaning system and the high-pressure gas ash removal system to clean the multiple catalyst modules; the multi-phase medium ash removal system has the beneficial effects that the accumulated ash in the pore channels and micropores of the catalyst is removed by providing the multi-phase medium ash removal system and adopting a high-pressure gas and dry ice particle composite ash removal method, and compared with wet ash removal, the catalyst structure cannot be damaged, and the loss of active components is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial flue gas denitration, and more particularly to a multiphase medium soot blowing system and method for a denitration catalyst. Background Art

[0002] With increasingly stringent environmental protection requirements, the flue gas in the power, steel, chemical, building materials and other industries mostly adopts SCR denitrification technology to achieve deep NOx emission reduction. The core of SCR denitrification technology is the catalyst, which can be divided into honeycomb type, plate type and corrugated plate type. Flue gas contains a large amount of fly ash, and toxic substances such as sulfur and ammonia generated in low temperature environment are easy to cause blockage of the catalyst surface and pores.

[0003] SCR denitration systems are usually equipped with soot blowers whose medium is steam or compressed air. However, such soot blowers can only remove the dust accumulated on the surface of the catalyst, and are less efficient in removing dust that has been blocked in the catalyst pores. Therefore, the denitration catalyst needs to be cleared and regenerated regularly.

[0004] Similar to the patent number CN202011022294.X, a precise sootblowing system for eliminating purge blind spots is provided. A hood-type steam sootblower is installed on the boiler in conjunction with an existing steam sootblower to form a steam sootblowing system capable of precisely purge blind spots, including: a steam main pipe, which is connected to the existing steam sootblowing pipeline of the boiler for introducing sootblowing steam; multiple hood-type sootblower, multiple hood-type sootblower are arranged in the purge blind spot of the boiler horizontal flue; at least one steam distribution pipe, at least one steam distribution pipe has an air inlet end connected to the steam main pipe, and an air outlet end connected to multiple hood-type sootblower, wherein a sootblowing electric valve and a check valve are installed on the steam main pipe, the sootblowing electric valve is located between the air inlet end of the steam main pipe and the nearest steam distribution pipe, and the check valve is located between the air outlet end of the steam main pipe and the nearest steam distribution pipe. This invention has the beneficial effect of solving the problem of purge blind spots in the use of traditional steam sootblower and precisely eliminating the purge blind spots;

[0005] The wet washing method is commonly used to clean the dust accumulated in the catalyst pores, such as high-pressure water washing, chemical cleaning, ultrasonic cleaning, etc. This method is easy to damage the catalyst structure, causing irreversible catalyst structure and loss of active components, and the removal efficiency of dust accumulated in the micropores is low. Therefore, it is necessary to develop a dust cleaning method with good cleaning effect and no damage to the catalyst for practical use. 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. A multiphase medium cleaning system is proposed, which adopts a composite cleaning method of high-pressure gas and dry ice particles to remove the accumulated dust in the catalyst channels and micropores. Compared with wet cleaning, it will not damage the catalyst structure and avoid the loss of active components.

[0007] To this end, the technical solution adopted is that a multiphase medium soot blowing system for a denitrification catalyst of the present invention includes a cleaning cart, the cleaning cart is connected to a dry ice cleaning system and a high-pressure gas cleaning system through a pipeline; the cleaning cart is controlled by an electrical connection, the cleaning cart drive is set between two brackets, the cleaning cart is set on multiple catalyst modules, and the cleaning cart 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, a valve and a flow meter. The high-pressure gas cleaning pipe is connected and communicated with the high-pressure gas storage tank, and a plurality of valves and flow meters are provided on the high-pressure gas cleaning pipe.

[0009] Preferably, the dry ice cleaning system comprises a dry ice cleaning pipe, a dry ice storage box, a valve and a flow meter. The dry ice cleaning pipe is connected to and communicated with the dry ice storage box, and a plurality of valves and flow meters are provided 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 in the cleaning trolley, and the ends of the dry ice cleaning tube and the high-pressure gas cleaning tube are both provided with a plurality of blowing holes arranged in the cleaning trolley.

[0011] Preferably, the two brackets are symmetrically arranged, and longitudinal adjustment platforms are longitudinally inserted on the two brackets. Two longitudinal adjustment screws are rotatably arranged on the two longitudinal adjustment platforms, and the two longitudinal adjustment screws are respectively connected to the two brackets through threaded fitting.

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

[0013] Preferably, the driving connection center screw includes a plurality of connection screws, and the connection screws are connected by inner screws.

[0014] Preferably, screw hole supports are fixed at both ends of the cleaning trolley, two fixed conical screw holes are arranged in the screw hole supports, a central threaded hole is arranged at the middle end of the screw hole supports, the two fixed conical 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 in the two fixed conical screw holes, and the ends of the dry ice cleaning tube and the high-pressure gas cleaning tube are respectively connected to the two fixed conical screw holes through conical screw end covers;

[0015] The cleaning trolley is provided with a plurality of rotating wheel hubs through a rotating shaft, and the side end of the cleaning trolley is provided with a plurality of side rotating wheels through a short shaft.

[0016] The upper and lower ends of the cleaning trolley are respectively provided with a plurality of air outlet holes, and a closed plug plate is plugged into the air outlet hole, and the closed plug plate is sealed and connected to the upper end or the lower end of the cleaning trolley by bolts;

[0017] A center hole connecting platform is arranged at the center of the interior of the cleaning trolley, and the two ends of the center hole connecting platform are respectively connected to the center threaded holes of the two screw hole supports, and the center hole connecting platform and the two center threaded holes are connected and driven by the center screw through threaded matching.

[0018] Preferably, the moving speed of the cleaning trolley is 0.1-0.5 m / min; the particle size of the dry ice particles 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.

[0019] A method for a multiphase medium sootblowing system for a denitration catalyst comprises the following steps:

[0020] S1: multiple catalyst modules are arranged side by side between two brackets, and a cleaning trolley is arranged on the multiple catalyst modules;

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

[0022] S3: Control the cleaning trolley and dry ice cleaning system through the control system to perform dry ice cleaning mode;

[0023] S4: The cleaning trolley and the high-pressure gas cleaning system are controlled by the control system to perform the high-pressure gas cleaning mode;

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

[0025] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures specifically pointed out in this application document.

[0026] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0028] Figure 1It is a structural schematic diagram of a multiphase medium soot blowing system for a denitration catalyst according to the present invention;

[0029] Figure 2 The overall structure of the soot blowing system of the present invention is shown in FIG. Figure 1 ;

[0030] Figure 3 The overall structure of the soot blowing system of the present invention is shown in FIG. Figure 2 ;

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

[0032] Figure 5 is a schematic structural diagram of the stent of the present invention;

[0033] Figure 6 It is a structural schematic diagram of the driving structure of the cleaning trolley of the present invention;

[0034] Figure 7 The structure of the cleaning trolley of the present invention is shown in FIG. Figure 1 ;

[0035] Figure 8 The structure of the cleaning trolley of the present invention is shown in FIG. Figure 2 ;

[0036] Fig. 9 It is a structural schematic diagram of a dry ice cleaning tube and a high-pressure gas cleaning tube of the present invention;

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

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

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

[0040] Fig.13 It is a comparison diagram of the tilting effect used by the sootblowing system of the present invention.

[0041] In the figure: control system 1; bracket 2; dry ice cleaning system 3; high-pressure gas cleaning system 4; cleaning trolley 5; dry ice cleaning pipe 6; high-pressure gas cleaning pipe 7; valve 8; flow meter 9; longitudinal adjustment platform 10; longitudinal adjustment screw 11; transport drive motor 12; drive connection center screw 13; screw hole support 14; closing plug plate 15; fixed cone screw hole 16; center threaded hole 17; rotating wheel hub 18; side rotating wheel 19; air outlet hole 20; center hole connecting platform 21. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "middle", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0044] In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. Specific implementation method one:

[0047] like Figure 1 and Figure 2As shown, a multiphase medium soot blowing system for a denitrification catalyst includes a cleaning trolley 5, which is connected to a dry ice cleaning system 3 and a high-pressure gas cleaning system 4 through a pipeline; the cleaning trolley 5 is electrically connected to a control system 1, the cleaning trolley 5 is driven and set between two brackets 2, and the cleaning trolley 5 is set 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: a plurality of catalyst modules are arranged side by side between two brackets 2, and a cleaning trolley 5 is arranged on a plurality of catalyst modules; by connecting and connecting the cleaning trolley 5 to the dry ice cleaning system 3 and the high-pressure gas cleaning system 4, a cleaning mode is selected according to the blockage of the catalyst; the cleaning trolley 5 and the dry ice cleaning system 3 are 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 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 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 according to the blockage situation; taking the honeycomb catalyst as an example, a module contains 72 catalyst monomers, and its size is length × width × height

[0050] 1910×970×1000mm; adopts high-pressure gas + dry ice cleaning mode, the high-pressure gas source is compressed air, its pressure is 0.2-2.0MPa, and the particle size of dry ice particles is less than 0.5mm; the cleaning cart 5 is placed above the catalyst module, and the cleaning pipe is 50-500mm away from the surface of the catalyst module. At the beginning of cleaning, the valve 8 of the high-pressure gas cleaning pipe 7 of the high-pressure gas cleaning system 4 is opened, and high-pressure gas is introduced (the valve of the dry ice cleaning pipe is in the closed state), and the cleaning cart 5 moves from one side of the catalyst module to the other side at a speed of 0.1-0.5m / min. When it reaches the other side of the catalyst, the valve 8 of the high-pressure gas cleaning pipe 7 is automatically closed, and the valve 8 of the dry ice cleaning pipe 7 is opened to introduce dry ice particles. At the same time, the cleaning cart moves from the B side to the A side of the catalyst module. When the cleaning cart reaches the A side, the valve of the dry ice cleaning pipe is automatically closed;

[0051] The cleaning procedure can be performed multiple times according to the catalyst blockage and cleaning effect; the dust collected by the dust collection system is transported to the hazardous waste storage in bulk bags;

[0052] The dust collection system includes a dust collection device, a dust discharge device, a packaging bag, etc.;

[0053] The effect of catalyst before and after cleaning is as follows Fig.13As shown in the table below, the dust accumulation in the catalyst through-holes has been basically removed. By analyzing the specific surface area of ​​the catalyst, the specific surface area and pore volume have been improved after cleaning, as shown in the following table:

[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] Specific surface area and pore structure of catalyst before and after cleaning

[0056] The system uses a composite cleaning method of high-pressure gas and dry ice particles to remove accumulated dust in the catalyst channels and micropores. Compared with wet cleaning, it will not damage the catalyst structure and avoid the loss of active components. Specific implementation method 2:

[0058] like Figure 1 — Fig.13 As shown, a multiphase medium soot blowing system and method for a denitrification catalyst, the high-pressure gas soot cleaning system 4 includes a high-pressure gas cleaning pipe 7, a high-pressure gas storage tank, a valve 8 and a flow meter 9, the high-pressure gas cleaning pipe 7 is connected and communicated with the high-pressure gas storage tank, and a plurality of valves 8 and flow meters 9 are arranged 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, and the high-pressure gas storage tank, valve 8 and flow meter 9 are conveniently used for automatic control through the control system 1. The high-pressure gas in the high-pressure gas storage tank is compressed air, nitrogen or steam and other gases, and the gas pressure is 0.2-4MPa, so the high-pressure gas is used in the cleaning mode. Specific implementation method three:

[0061] like Figure 1 — Fig.13 As shown, a multiphase medium soot blowing system and method for a denitrification catalyst, the dry ice cleaning system 3 includes a dry ice cleaning pipe 6, a dry ice storage box, a valve 8 and a flow meter 9, the dry ice cleaning pipe 6 is connected and communicated with the dry ice storage box, and a plurality of valves 8 and flow meters 9 are arranged 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 trolley 5 for use, and the dry ice storage box, valve 8 and flow meter 9 are conveniently used for automatic control 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 particles is 0.01-10mm; and the dry ice cleaning mode is used. Specific implementation method four:

[0064] like Figure 1 — Fig.13As shown, a multiphase medium soot blowing system and method for a denitrification catalyst, the ends of the dry ice cleaning pipe 6 and the high-pressure gas cleaning pipe 7 are fixed in the cleaning cart 5, and the ends of the dry ice cleaning pipe 6 and the high-pressure gas cleaning pipe 7 are provided with multiple blowing holes arranged in the cleaning cart 5.

[0065] The working principle and beneficial effects of this embodiment are as follows: the ends of the dry ice cleaning tube 6 and the high-pressure gas cleaning tube 7 are fixed in the cleaning trolley 5, so that the cleaning trolley 5 can drive the dry ice cleaning tube 6 and the high-pressure gas cleaning tube 7 to perform cleaning in a displacement manner, and the ends of the dry ice cleaning tube 6 and the high-pressure gas cleaning tube 7 are provided with a plurality of blowing holes arranged in the cleaning trolley 5, so that it is convenient to use the high-pressure gas and dry ice in a combined cleaning mode. Specific implementation method five:

[0067] like Figure 1 — Fig.13 As shown, a multiphase medium sootblowing system and method for a denitration catalyst, wherein the two brackets 2 are symmetrically arranged, and longitudinal adjustment platforms 10 are longitudinally inserted on the two brackets 2. Two longitudinal adjustment screws 11 are rotatably arranged on the two longitudinal adjustment platforms 10, and the two longitudinal adjustment screws 11 are respectively connected to the two brackets 2 by threaded fitting.

[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 brackets 2, and the two longitudinal adjustment screws 11 on the two brackets 2 are rotated to adjust the heights of the two longitudinal adjustment platforms 10 on the two brackets 2. Then, by adjusting the heights of the two longitudinal adjustment platforms 10, the height of the driving connection 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 — Fig.13 As shown, a multiphase medium soot blowing system and method for a denitrification catalyst, the two longitudinal adjustment platforms 10 are respectively provided 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, and the drive connection center screw 13 is rotatably connected in the bearing seat.

[0071] The working principle and beneficial effects of this embodiment are as follows: a transport drive motor 12 and a bearing seat are respectively provided on the two longitudinal adjustment platforms 10, and then the transport drive motor 12 is driven by the control system 1 to drive the driving 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 matching. Specific implementation method seven:

[0073] like Figure 1 — Fig.13 As shown, a multiphase medium soot blowing system and method for a denitration catalyst, the driving connection center screw 13 includes a plurality of connection screws, and the connection screws are connected by inner screws.

[0074] The working principle and beneficial effects of this embodiment are as follows: the driving connection center screw 13 is connected through multiple connection screws, which is convenient for adjustment according to different lengths, and further convenient for assembly and use on multiple catalyst modules of different lengths for cleaning. Specific implementation eight:

[0076] like Figure 1 — Fig.13 As shown, a multiphase medium sootblowing system and method for a denitration catalyst, wherein screw hole supports 14 are fixed at both ends of the cleaning trolley 5, two fixed cone screw holes 16 are arranged in the screw hole supports 14, a central threaded hole 17 is arranged at the middle end of the screw hole supports 14, the two fixed cone screw holes 16 are connected to the inside of the cleaning trolley 5, a dry ice cleaning pipe 6 and a high-pressure gas cleaning pipe 7 are respectively inserted in the two fixed cone screw holes 16, and the ends of the dry ice cleaning pipe 6 and the high-pressure gas cleaning pipe 7 are respectively connected to the two fixed cone screw holes 16 through cone screw end covers;

[0077] The cleaning trolley 5 is provided with a plurality of rotating hubs 18 through a rotating shaft, and the side end of the cleaning trolley 5 is provided with a plurality of side rotating wheels 19 through a short shaft.

[0078] The upper and lower ends of the cleaning trolley 5 are respectively provided with a plurality of air outlet holes 20, and a closed plug plate 15 is plugged into the air outlet hole 20, and the closed plug plate 15 is sealed and connected to the upper end or the lower end of the cleaning trolley 5 by bolts;

[0079] A center hole connecting platform 21 is provided at the center of the interior of the cleaning trolley 5, and the two ends of the center hole connecting platform 21 are respectively connected to the center threaded holes 17 of the two screw hole supports 14, and the center hole connecting platform 21 and the two center threaded holes 17 are connected and driven by the center screw 13 through threaded matching.

[0080] The working principle and beneficial effects of this embodiment are as follows: through the two fixed cone screw holes 16 in the screw hole support 14 at both ends of the cleaning trolley 5, the dry ice cleaning pipe 6 and the high-pressure gas cleaning pipe 7 are respectively inserted into the two fixed cone screw holes 16, and the ends of the dry ice cleaning pipe 6 and the high-pressure gas cleaning pipe 7 are respectively connected to the two fixed cone screw holes 16 through cone screw end covers; the dry ice cleaning pipe 6 and the high-pressure gas cleaning pipe 7 are fixed in the cleaning trolley 5, and a plurality of blowing holes are provided at the ends of the dry ice cleaning pipe 6 and the high-pressure gas cleaning pipe 7, and then during the driving of the cleaning trolley 5 to move, the dry ice cleaning pipe 6 and the high-pressure gas cleaning pipe 7 are used to realize the separate addition and combined addition of high-pressure gas and dry ice;

[0081] The cleaning trolley 5 is provided with a plurality of rotating hubs 18 which are rotated by a rotating shaft and are used for displacement on a plurality of catalyst modules for cleaning. A plurality of side rotating wheels 19 are provided at the side end of the cleaning trolley 5 which are rotated by a short shaft, so that the cleaning trolley 5 can be displaced in an environment with a side wall which is easy to slide.

[0082] A plurality of air outlet holes 20 are respectively arranged at the upper and lower ends of the inner wall of the cleaning trolley 5. When the lower side is used, the air outlet hole 20 at the upper end is plugged with a sealing closing plug plate 15, and the plurality of air outlet holes 20 at the upper end are closed to facilitate the cleaning of the lower side. Correspondingly, when it is necessary to clean the plurality of catalyst modules at the height of the upper side, the air outlet holes 20 at the lower end are closed. When it is necessary to use the plurality of catalyst modules arranged side by side, the plurality of catalyst modules arranged side by side can be cleaned as a whole at the same time.

[0083] A center hole connecting platform 21 is provided at the center of the interior of the cleaning trolley 5, and the two ends of the center hole connecting platform 21 are respectively connected to the center threaded holes 17 of the two screw hole supports 14, thereby driving the connecting center screw 13 to threadably cooperate with the center hole connecting platform 21 and the two center threaded holes 17, thereby realizing the driving use of the center to move the cleaning trolley 5. Specific implementation method nine:

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

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

[0088] like Figure 1 — Fig.13 As shown, a multiphase medium soot blowing method for a denitration catalyst comprises the following steps:

[0089] S1: multiple catalyst modules are arranged side by side between two brackets 2, and a cleaning trolley 5 is arranged on the multiple catalyst modules;

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

[0091] S3: Control the cleaning vehicle 5 and the dry ice cleaning system 3 to perform dry ice cleaning mode through the control system 1;

[0092] S4: The cleaning trolley 5 and the high-pressure gas cleaning system 4 are controlled by the control system 1 to perform a high-pressure gas cleaning mode;

[0093] S5: The control system 1 is used to operate and control the cleaning vehicle 5, the dry ice cleaning system 3 and the high-pressure gas cleaning system 4 to perform a high-pressure gas plus dry ice combined cleaning mode.

[0094] The above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention also fall within the protection scope of the present invention.

Claims

1. A multiphase medium sootblowing system for denitration catalyst, characterized in that: The invention comprises a cleaning trolley (5), wherein the cleaning trolley (5) is connected to a dry ice cleaning system (3) and a high-pressure gas cleaning system (4) via a pipeline; the cleaning trolley (5) is electrically connected to a control system (1); the cleaning trolley (5) is driven and arranged between two brackets (2); the cleaning trolley (5) is arranged on a plurality of catalyst modules; the cleaning trolley (5) drives the dry ice cleaning system (3) and the high-pressure gas cleaning system (4) to clean the plurality of catalyst modules.

2. A multiphase medium sootblowing system for denitration catalyst according to claim 1, characterized in that: The high-pressure gas cleaning system (4) comprises a high-pressure gas cleaning pipe (7), a high-pressure gas storage tank, a valve (8) and a flow meter (9); the high-pressure gas cleaning pipe (7) is connected to and communicated with the high-pressure gas storage tank; and a plurality of valves (8) and flow meters (9) are provided on the high-pressure gas cleaning pipe (7).

3. A multiphase medium sootblowing system for denitration catalyst according to claim 2, characterized in that: The dry ice cleaning system (3) comprises a dry ice cleaning pipe (6), a dry ice storage box, a valve (8) and a flow meter (9); the dry ice cleaning pipe (6) is connected to and communicated with the dry ice storage box; and a plurality of valves (8) and flow meters (9) are provided on the dry ice cleaning pipe (6).

4. A multiphase medium sootblowing system for denitration catalyst according to claim 3, characterized in that: The ends of the dry ice cleaning pipe (6) and the high-pressure gas cleaning pipe (7) are both fixed in the cleaning trolley (5); the ends of the dry ice cleaning pipe (6) and the high-pressure gas cleaning pipe (7) are both provided with a plurality of spray holes arranged in the cleaning trolley (5).

5. A multiphase medium sootblowing system for denitration catalyst according to claim 1, characterized in that: The two brackets (2) are symmetrically arranged, and a longitudinal adjustment platform (10) is longitudinally inserted on the two brackets (2). Two longitudinal adjustment screws (11) are rotatably arranged on the two longitudinal adjustment platforms (10), and the two longitudinal adjustment screws (11) are respectively connected to the two brackets (2) through threaded fitting.

6. A multiphase medium sootblowing system for denitration catalyst according to claim 5, characterized in that: The two longitudinal adjustment platforms (10) are respectively provided 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 medium sootblowing system for denitration catalyst according to claim 6, characterized in that: The driving connection center screw (13) comprises a plurality of connection screws, and the connection screws are connected by inner screws.

8. A multiphase medium sootblowing system for denitration catalyst according to claim 6, characterized in that: The two ends of the cleaning trolley (5) are respectively fixed with screw hole supports (14), two fixed conical screw holes (16) are arranged in the screw hole supports (14), a central threaded hole (17) is arranged at the middle end of the screw hole supports (14), the two fixed conical screw holes (16) are both connected to the inside of the cleaning trolley (5), a dry ice cleaning pipe (6) and a high-pressure gas cleaning pipe (7) are respectively inserted in the two fixed conical screw holes (16), and the ends of the dry ice cleaning pipe (6) and the high-pressure gas cleaning pipe (7) are respectively connected to the two fixed conical screw holes (16) through conical screw end covers; The cleaning trolley (5) is provided with a plurality of rotating hubs (18) which are rotatable via a rotating shaft, and the side end of the cleaning trolley (5) is provided with a plurality of side rotating wheels (19) which are rotatable via a short shaft; The upper and lower ends of the cleaning trolley (5) are respectively provided with a plurality of air outlet holes (20), and a closed plug plate (15) is plugged into the air outlet hole (20), and the closed plug plate (15) is sealed and connected to the upper end or the lower end of the cleaning trolley (5) by bolts; A center hole connecting platform (21) is arranged at the center of the interior of the cleaning trolley (5), and the two ends of the center hole connecting platform (21) are respectively connected to the center threaded holes (17) of the two screw hole supports (14), and the center hole connecting platform (21) and the two center threaded holes (17) are connected and driven by the center screw (13) through threaded matching.

9. A multiphase medium sootblowing system for denitration catalyst 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 particles 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.

10. A method for a multiphase medium sootblowing system for a denitration catalyst, applicable to the multiphase medium sootblowing system for a denitration catalyst according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: arranging a plurality of catalyst modules side by side between two brackets (2), and arranging a cleaning trolley (5) on the plurality of catalyst modules; S2: by connecting the cleaning trolley (5) to the dry ice cleaning system (3) and the high-pressure gas cleaning system (4), a cleaning mode is selected according to the catalyst blockage situation; S3: enabling the cleaning trolley (5) and the dry ice cleaning system (3) to perform dry ice cleaning; S4: enabling the cleaning trolley (5) and the high-pressure gas cleaning system (4) to perform high-pressure gas cleaning; S5: The cleaning vehicle (5), the dry ice cleaning system (3) and the high-pressure gas cleaning system (4) are used to perform a combination of high-pressure gas and dry ice cleaning.

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