Method and device for mounting an scr catalyst module

Abstract

The application provides an installation method and installation device of an SCR catalyst module, relates to the technical field of catalyst module installation in an SCR denitration reactor, and is used for placing an SCR catalyst module into a waste heat boiler. The installation method comprises the following steps: a support frame with a placing area is arranged in the waste heat boiler; a first hoisting mechanism is movably arranged on the top of the support frame; a temporary exit is formed on the bottom of the waste heat boiler; and the first hoisting mechanism hoists the SCR catalyst module into the waste heat boiler through the temporary exit and places the SCR catalyst module in the placing area of the support frame. The application also provides an installation device of an SCR catalyst module. Through the installation method and installation device of the SCR catalyst module provided by the application, workers can easily place the SCR catalyst module into the waste heat boiler, the problem that it is difficult to place the catalyst module in a narrow space in the prior art is solved, the working intensity of the workers is reduced, and the smooth placement of the SCR catalyst module in the waste heat boiler is ensured.

Description

Technical Field

[0001] This invention relates to the field of catalyst module installation technology in SCR denitrification reactors, specifically to an installation method and device for an SCR catalyst module. Background Technology

[0002] SCR (Selective Catalytic Reduction) denitrification systems refer to the redox reaction between nitrogen oxides in flue gas and injected ammonia under the action of a catalyst, producing nitrogen and water. An SCR denitrification system mainly includes a catalyst, an ammonia injection system, a reducing agent (i.e., ammonia) preparation system, and other auxiliary devices.

[0003] In the field of gas turbine denitrification, denitrification catalysts and ammonia injection systems need to be installed inside waste heat boilers. Generally, to ensure sufficient space for uniform mixing of ammonia and nitrogen oxides, approximately 6m² of space needs to be reserved inside the waste heat boiler (some power plants reserve less than 4m²). However, gas turbines put into operation in earlier years could meet emission standards without the need for SCR denitrification systems, so most did not reserve space for SCR denitrification system retrofits. With technological advancements and increased environmental awareness, ammonia generated in denitrification systems now needs to be treated. Therefore, older waste heat boilers need to be retrofitted. However, the maintenance passages between the various heat exchangers inside the waste heat boilers are generally less than 1m², making it impossible to install ammonia injection systems and catalysts. Ammonia injection pipelines can be installed at the inlet of waste heat boilers. However, catalyst modules have a fixed size and are quite heavy, requiring hoisting. In a waste heat boiler with ample space, large equipment such as installation trolleys and robotic arms can be used to place the catalyst modules. However, placing the catalyst modules in a confined space, even less than 1 meter, obviously causes trouble for the staff. Therefore, there is an urgent need for a method or device to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide an installation device and a method for installing an SCR catalyst module, in order to solve the problem of difficulty in placing the catalyst module in a confined space in the prior art.

[0005] To achieve the above objectives, the present invention provides a method for installing an SCR catalyst module, for placing the SCR catalyst module into a waste heat boiler, the method comprising:

[0006] A support frame with a placement area is provided inside the waste heat boiler;

[0007] A first hoisting mechanism is movably installed inside the waste heat boiler and on top of the support frame;

[0008] A temporary entrance / exit is opened at the bottom of the waste heat boiler. The first hoisting mechanism is operated to hoist the SCR catalyst module into the waste heat boiler through the temporary entrance / exit and place it in the placement area of ​​the support frame.

[0009] Specifically, the first hoisting mechanism is mounted on a track, and the installation method of the SCR catalyst module further includes: after setting up the support frame, installing the track on the top of the support frame, the track being used to guide the movement direction of the first hoisting mechanism.

[0010] Specifically, the installation method further includes: before installing the track, setting up a second hoisting mechanism outside the waste heat boiler and between the top of the waste heat boiler and the boiler drum;

[0011] The track is hoisted into the waste heat boiler using the second hoisting mechanism.

[0012] Specifically, the installation method further includes: setting multiple columns in the placement area of ​​the support frame to divide the placement area into multiple placement sub-areas, and the placement sub-area above the temporary entrance / exit is a temporary access channel.

[0013] Specifically, each column is formed by splicing together multiple channel steel sections.

[0014] Specifically, the first hoisting mechanism hoists the SCR catalyst module through the temporary access channel and stacks the SCR catalyst modules one by one from bottom to top into other placement sub-areas besides the temporary access channel.

[0015] Specifically, the installation method of the SCR catalyst module further includes: after the first hoisting mechanism has completed the stacking and placement of the SCR catalyst modules in the other placement sub-areas except for the temporary access channel, the track and the first hoisting mechanism are removed;

[0016] The SCR catalyst module is hoisted into the temporary entrance / exit by the second hoisting mechanism and stacked from top to bottom in the temporary entrance / exit channel.

[0017] Another aspect of the present invention provides an installation apparatus for an SCR catalyst module, the installation apparatus comprising:

[0018] A support frame is installed inside the waste heat boiler, and the support frame has a placement area in which the SCR catalyst module is placed.

[0019] The first hoisting mechanism is movably installed inside the waste heat boiler and located at the top of the support frame. The first hoisting mechanism is used to hoist the SCR catalyst module and place the SCR catalyst module in the placement area of ​​the support frame.

[0020] A temporary entrance / exit is located at the bottom of the waste heat boiler and below the support frame. The first hoisting mechanism uses the temporary entrance / exit to hoist the SCR catalyst module into the waste heat boiler.

[0021] Specifically, the installation device for the SCR catalyst module further includes: a track disposed on the top of the support frame, and the first hoisting mechanism being movably disposed on the track.

[0022] Specifically, the installation device for the SCR catalyst module further includes a second hoisting mechanism, located outside the waste heat boiler, between the top of the waste heat boiler and the boiler drum, for hoisting the track into the waste heat boiler.

[0023] Specifically, the installation device further includes: multiple columns, which are set in the placement area of ​​the support frame to divide the placement area of ​​the support frame into multiple placement sub-areas, and multiple SCR catalyst modules can be stacked in each placement sub-area.

[0024] Specifically, the installation device further includes: multiple reinforcing members, with at least one reinforcing member fixedly disposed between each column and the support frame.

[0025] The SCR catalyst module installation method provided by this invention involves erecting a support frame within the confined space inside a waste heat boiler. A first hoisting mechanism located at the top of the support frame is used to hoist the SCR catalyst modules one by one into the waste heat boiler through a temporary entrance / exit at the bottom and place them in the designated placement area on the support frame. This allows the SCR catalyst modules to be transported from outside the waste heat boiler to below the temporary entrance / exit using other transport vehicles, facilitating the hoisting of the SCR catalyst modules into the waste heat boiler by workers using the first hoisting mechanism. This achieves efficient placement of the SCR catalyst modules within a confined space. This invention also provides an SCR catalyst module installation device. The SCR catalyst module and installation method provided by this invention enable workers to easily and conveniently place the SCR catalyst modules into the waste heat boiler without occupying extra space inside the waste heat boiler. This solves the problem of difficulty in placing catalyst modules in confined spaces in existing technologies, reduces the workload of workers, and ensures the smooth placement of the SCR catalyst modules within the waste heat boiler.

[0026] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0028] Figure 1 This is a schematic diagram of the installation device for the SCR catalyst module provided in an embodiment of the present invention;

[0029] Figure 2 yes Figure 1 Top view of the SCR catalyst module installation device;

[0030] Figure 3 This is a schematic diagram of the installation device for the SCR catalyst module provided in this embodiment of the invention, without placing the SCR catalyst module in the temporary access channel.

[0031] Explanation of reference numerals in the attached figures

[0032] 1-Support frame; 2-SCR catalyst module; 3-Temporary access passage; 5-Column; 6-Reinforcing component; 11-Top beam; 12-Side support rod; 13-Connecting rod; 14-Horizontal bar. Detailed Implementation

[0033] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0034] Figure 1 This is a schematic diagram of the installation device for the SCR catalyst module; Figure 2 yes Figure 1 Top view of the installation assembly of the SCR catalyst module in China; Figure 3 This is a schematic diagram showing the installation device for the SCR catalyst module, where the SCR catalyst module is not placed in the temporary access passage.

[0035] This invention provides a method for installing an SCR catalyst module, used to place the SCR catalyst module into a waste heat boiler, the installation method comprising:

[0036] A support frame 1 with a placement area is provided inside the waste heat boiler;

[0037] A first hoisting mechanism is movably installed inside the waste heat boiler and on top of the support frame 1;

[0038] A temporary entrance / exit is opened at the bottom of the waste heat boiler. The first hoisting mechanism is operated to hoist the SCR catalyst module 2 into the waste heat boiler through the temporary entrance / exit and place it in the placement area of ​​the support frame 1.

[0039] The SCR catalyst module installation method provided by this invention involves erecting a support frame 1 with a placement area inside a waste heat boiler. A movable first hoisting mechanism is installed at the top of the support frame 1 away from the temporary entrance / exit. The SCR catalyst module 2 outside the waste heat boiler is hoisted into the waste heat boiler through the temporary entrance / exit at the bottom of the waste heat boiler using the first hoisting mechanism. The first hoisting mechanism is then moved at the top of the support frame 1 to place the SCR catalyst module 2 into the placement area of ​​the support frame 1. The first hoisting mechanism is an electric hoist. In this way, even if the space is small and large equipment such as installation trolleys or robotic arms cannot be used, the SCR catalyst module 2 can still be placed into the placement area of ​​the support frame 1 inside the waste heat boiler without occupying extra space inside the waste heat boiler. This solves the problem of difficulty in placing catalyst modules in a small space in the prior art.

[0040] In one embodiment, such as Figures 1-3 As shown, the support frame 1 is assembled from multiple channel steels. Four parallel channel steels are vertically positioned at the bottom of the waste heat boiler, and these four channel steels are defined as the side support rods 12 forming the support frame 1. The bottom of each pair of side support rods 12 is connected by a connecting rod 13. The channel steel furthest from the bottom of the waste heat boiler is the top beam 11 of the support frame 1, and the top of each pair of side support rods 12 is connected by the top beam 11. Corresponding side support rods 12 in different groups are fixedly connected by channel steels. The area enclosed by the side support rods 12, connecting rods 13, and top beam 11 is the placement area. To facilitate the placement of SCR catalyst modules in the placement area, multiple horizontal bars 14 are erected between two connecting rods 13. The spacing between adjacent horizontal bars 14 is determined according to the size of the SCR catalyst module. Vertical columns 5 are installed on the horizontal bars 14, each column 5 being parallel to each side support rod 12. The columns 5 divide the placement area into multiple placement sub-areas, such as... Figure 1 and Figure 2 As shown, SCR catalyst modules are stacked in each placement sub-area. Each column 5 is formed by splicing multiple channel steel segments. During the process of placing SCR catalyst modules into the placement area, the formation of columns 5 and the placement of SCR catalyst modules can be carried out simultaneously and alternately. During the stacking and placement of SCR catalyst modules, columns 5 on both sides of the SCR catalyst modules can be continuously assembled until the channel steel segments of the assembled columns 5 abut against the top beam 11. The columns 5 and the top beam 11 are fixed by the reinforcement 6, which is an angle steel or channel steel, thereby ensuring that each column 5 is stable and does not deform.

[0041] The installation method of the SCR catalyst module also includes removing the insulation plates, various pipes, fittings, wing plates, furnace manifold limiting bases, and other components in the installation area of ​​the support frame 1 inside the waste heat boiler before hoisting the support frame 1 into the waste heat boiler, so as to erect the support frame 1 and carry out subsequent processes. After setting the support frame 1, the track is installed on the top of the support frame 1 to guide the movement direction of the first hoisting mechanism.

[0042] To facilitate the placement of the SCR catalyst module, the installation method further includes: before installing the track, setting up a second hoisting mechanism outside the waste heat boiler, between the boiler top and the boiler drum; and hoisting the track into the waste heat boiler using the second hoisting mechanism. The second hoisting mechanism is a winch. To enable the first hoisting mechanism to move along a specified direction on the top of the support frame 1 to place the SCR catalyst module into each placement sub-area of ​​the placement area, a track is set on the top of the support frame 1. The first hoisting mechanism can move along the extension direction of the track. For installing the track, the second hoisting mechanism is installed between the boiler top and the boiler drum outside the waste heat boiler. A flange hole is provided on the top of the support frame 1, and the wire rope of the second hoisting mechanism passes through the flange hole into the waste heat boiler. The track is hoisted into the waste heat boiler through a temporary inlet and outlet using the wire rope and installed on the support frame 1. At the top, during installation, to facilitate track installation, a hand-operated hoist is temporarily installed on support frame 1. The hand-operated hoist pulls the end of the track away from the wire rope. With the combined action of the hand-operated hoist and the second hoisting mechanism, the track is leveled and hoisted to the installation position at the top of support frame 1, thus completing the track installation. The second hoisting mechanism can also hoist multiple channel steels that make up support frame 1 into the waste heat boiler through a temporary entrance and exit, making it convenient for workers to assemble support frame 1 inside the waste heat boiler. During the assembly of support frame 1, temporary scaffolding can also be erected inside the waste heat boiler to facilitate the assembly work.

[0043] To facilitate the hoisting of the SCR catalyst module 2 through the temporary entrance / exit, the installation method further includes: setting multiple columns 5 within the placement area of ​​the support frame 1 to divide the placement area into multiple placement sub-areas, with the placement sub-area above the temporary entrance / exit serving as a temporary access channel 3. The temporary entrance / exit is located below one of the placement sub-areas, which becomes the temporary access channel 3 for hoisting the SCR catalyst module 2. The SCR catalyst module 2 entering through the temporary entrance / exit is transported to other placement sub-areas via the temporary access channel 3.

[0044] When placing SCR catalyst modules 2 into other placement sub-areas, the first hoisting mechanism hoists the SCR catalyst modules 2 through the temporary access channel 3 and stacks the SCR catalyst modules 2 one by one from bottom to top into other placement sub-areas except for the temporary access channel 3.

[0045] After the first hoisting mechanism completes the stacking of SCR catalyst modules 2 in all placement sub-areas except for the temporary access channel 3, the second hoisting mechanism lifts the SCR catalyst modules 2 into the temporary access channel 3 from the temporary entrance and places them from top to bottom. To ensure sufficient space for the first hoisting mechanism to move the SCR catalyst modules 2 out later, after placing the SCR catalyst modules 2 in all placement sub-areas except for the temporary access channel 3, the first hoisting mechanism and track are removed, and the top of the waste heat boiler is insulated. Then, the second hoisting mechanism winch is used to place the SCR catalyst modules 2 in the temporary access channel 3. To ensure the smooth placement of the SCR catalyst modules 2, an inverted method is used to place the SCR catalyst modules 2 from the top of the temporary access channel 3 towards the temporary entrance. After the installation of the SCR catalyst modules 2 in the temporary access channel 3 is completed, the support frame 1 is reinforced, and the removed parts inside the waste heat boiler are heat-treated. Finally, the temporary entrance is closed.

[0046] Another aspect of the present invention provides an installation apparatus for an SCR catalyst module, the installation apparatus comprising:

[0047] A support frame 1 is installed inside the waste heat boiler. The support frame 1 has a placement area, and the SCR catalyst module 2 is placed in the placement area.

[0048] The first hoisting mechanism is movably installed inside the waste heat boiler and located at the top of the support frame 1. The first hoisting mechanism is used to hoist the SCR catalyst module 2 and place the SCR catalyst module 2 in the placement area of ​​the support frame 1.

[0049] A temporary entrance / exit is located at the bottom of the waste heat boiler and below the support frame 1. The first hoisting mechanism uses the temporary entrance / exit to hoist the SCR catalyst module 2 into the waste heat boiler.

[0050] To facilitate the placement of the SCR catalyst module 2, the installation device for the SCR catalyst module further includes: a track, located on top of the support frame 1, with the first hoisting mechanism movably mounted on the track; and a second hoisting mechanism, located outside the waste heat boiler, between the boiler top and the boiler drum, for hoisting the track into the waste heat boiler. The second hoisting mechanism is a winch, which hoists the track into the waste heat boiler, and the track is mounted on the top beam 11 of the support frame 1.

[0051] like Figures 1-3As shown, the support frame 1 is assembled from multiple channel steels. One channel steel, furthest from the bottom of the waste heat boiler, serves as the top beam 11 of the support frame 1. The first hoisting mechanism is movably mounted on the top beam 11 of the support frame 1. The support frame 1 is assembled from side support rods 12, connecting rods 13, and the top beam 11. The multiple channel steels constituting the support frame 1 can be hoisted into the waste heat boiler for assembly via the second hoisting mechanism.

[0052] To facilitate the placement of the SCR catalyst module 2, the installation device further includes: multiple columns 5, arranged in the placement area of ​​the support frame 1, to divide the placement area of ​​the support frame 1 into multiple placement sub-areas, each capable of stacking multiple SCR catalyst modules 2. The multiple columns 5 divide the placement area into multiple placement sub-areas, allowing for better fixation of the SCR catalyst module 2 within each sub-area. To ensure the installation strength of the columns 5, the installation device further includes: multiple reinforcing members 6, with at least one reinforcing member 6 fixed between each column 5 and the support frame 1. The reinforcing member 6 is an angle steel or channel steel, which strengthens the connection between the column 5 and the top beam or side support rod 12 of the support frame 1.

[0053] The SCR catalyst module installation method provided by this invention involves erecting a support frame within the confined space inside a waste heat boiler. A first hoisting mechanism located at the top of the support frame is used to hoist the SCR catalyst modules one by one into the waste heat boiler through a temporary entrance / exit at the bottom and place them in the designated placement area on the support frame. This allows the SCR catalyst modules to be transported from outside the waste heat boiler to below the temporary entrance / exit using other transport vehicles, facilitating the hoisting of the SCR catalyst modules into the waste heat boiler by workers using the first hoisting mechanism. This achieves efficient placement of the SCR catalyst modules within a confined space. This invention also provides an SCR catalyst module installation device. The SCR catalyst module and installation method provided by this invention enable workers to easily and conveniently place the SCR catalyst modules into the waste heat boiler without occupying extra space inside the boiler. This solves the problem of difficulty in placing catalyst modules in confined spaces in existing technologies, reduces the workload of workers, and ensures the smooth placement of the SCR catalyst modules within the waste heat boiler.

[0054] The optional embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the scope of the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the protection scope of the embodiments of the present invention.

[0055] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not describe the various possible combinations separately.

Claims

1. A method for installing an SCR catalyst module, used to place the SCR catalyst module (2) into a waste heat boiler, characterized in that, The installation method includes: A support frame (1) with a placement area is installed inside the waste heat boiler. Before hoisting the support frame (1) into the waste heat boiler, the insulation scale, various pipes, fittings, wing plates, and furnace manifold limiting base of the installation area of ​​the support frame (1) inside the waste heat boiler are removed. Multiple columns (5) are set in the placement area of ​​the support frame (1) to divide the placement area into multiple placement sub-areas. The placement sub-area above the temporary entrance and exit is a temporary access channel (3). After the support frame (1) is set, a track is installed on the top of the support frame (1), the track being used to guide the movement direction of the first hoisting mechanism; wherein, before the track is installed, a second hoisting mechanism is set outside the waste heat boiler, between the furnace top of the waste heat boiler and the boiler drum, and the track is hoisted into the waste heat boiler through the second hoisting mechanism; A first hoisting mechanism is moved and installed inside the waste heat boiler and on top of the support frame (1), and the first hoisting mechanism is installed on a track; A temporary entrance / exit is opened at the bottom of the waste heat boiler. The first hoisting mechanism is operated to hoist the SCR catalyst module (2) into the waste heat boiler through the temporary entrance / exit and place it in the placement area of ​​the support frame (1), including: The first hoisting mechanism hoists the SCR catalyst module (2) through the temporary access channel (3) and stacks the SCR catalyst modules (2) one by one from bottom to top into other placement sub-areas except for the temporary access channel (3); The installation method of the SCR catalyst module further includes: After the first hoisting mechanism has completed the stacking and placement of the SCR catalyst modules (2) in the other placement sub-areas except for the temporary access channel (3), the track and the first hoisting mechanism are removed. The SCR catalyst module (2) is hoisted into the temporary entrance / exit by the second hoisting mechanism and stacked from top to bottom in the temporary entrance / exit channel (3). After the installation of the SCR catalyst module (2) in the temporary access passage (3) is completed, the support frame (1) is reinforced, the dismantled parts inside the waste heat boiler are heat-treated, and the temporary access passage is sealed.

2. The installation method of the SCR catalyst module according to claim 1, characterized in that, Each column (5) is formed by splicing together multiple channel steel sections.

3. An installation device for an SCR catalyst module, applied to the installation method of the SCR catalyst module as described in claim 1, characterized in that, The installation device includes: A support frame (1) is installed inside the waste heat boiler. The support frame (1) has a placement area, and the SCR catalyst module (2) is placed in the placement area. The first hoisting mechanism is movably installed inside the waste heat boiler and located at the top of the support frame (1). The first hoisting mechanism is used to hoist the SCR catalyst module (2) and place the SCR catalyst module (2) in the placement area of ​​the support frame (1). A temporary entrance / exit is located at the bottom of the waste heat boiler and below the support frame (1). The first hoisting mechanism hoists the SCR catalyst module (2) into the waste heat boiler through the temporary entrance / exit.

4. The installation device for the SCR catalyst module according to claim 3, characterized in that, The installation device for the SCR catalyst module further includes a track, which is set on the top of the support frame (1), and the first hoisting mechanism is movably set on the track.

5. The installation device for the SCR catalyst module according to claim 3, characterized in that, The installation device for the SCR catalyst module further includes a second hoisting mechanism, located outside the waste heat boiler, between the top of the waste heat boiler and the boiler drum, for hoisting the track into the waste heat boiler.

6. The installation device for the SCR catalyst module according to claim 3, characterized in that, The installation device also includes: multiple columns (5) set in the placement area of ​​the support frame (1) to divide the placement area of ​​the support frame (1) into multiple placement sub-areas, and multiple SCR catalyst modules (2) can be stacked in each placement sub-area.

7. The installation device for the SCR catalyst module according to claim 6, characterized in that, The installation device further includes: multiple reinforcing members (6), with at least one reinforcing member (6) fixedly disposed between each column (5) and the support frame (1).

Images