Method for installing a pressure ultraviolet device in a boiler makeup water system

Abstract

The application relates to a mounting method of a medium-pressure ultraviolet device in a boiler make-up water system, and belongs to the technical field of power plant equipment installation. The method comprises the following steps: welding a first eccentric reducer and a first pipeline from left to right; removing the original pipeline, and sequentially connecting a combination of a first valve, the first eccentric reducer and the first pipeline, the medium-pressure ultraviolet device from left to right at the position through flanges; installing a second valve at the right end of the original pipeline; selecting a second pipeline with a proper length, and welding the second pipeline and a second eccentric reducer; sequentially connecting a combination of the medium-pressure ultraviolet device, the second pipeline and the second eccentric reducer, the second valve through flanges; installing a support frame for the whole pipeline, and completing the installation work of the equipment pipeline; using the installation method, the whole pipeline can run smoothly, the installation efficiency of the pipeline is improved, and workers can conveniently repair or replace the corroded or damaged pipeline, thereby reducing the workload.

Description

Technical fields:

[0001] This application belongs to the field of power plant equipment installation technology, specifically relating to an installation method for a medium-pressure ultraviolet (UV) device in a boiler feedwater system. Background technology:

[0002] Boiler feedwater is usually sourced from tap water or surface water. Although it undergoes a water purification pretreatment process, many invisible bacteria and microorganisms can still be found in this seemingly clear and transparent water.

[0003] To remove bacteria and microorganisms from the water, boiler feedwater systems use sodium hypochlorite as a reducing agent to remove residual chlorine and non-oxidizing bactericides to kill bacteria, thereby reducing microbial growth and fouling of subsequent filters and membrane elements. However, microorganisms develop resistance to chlorine and non-oxidizing bactericides, and non-oxidizing bactericides are not effective against all types of microorganisms. Unkilled microorganisms can still proliferate rapidly and cause fouling.

[0004] Therefore, high-intensity medium-pressure ultraviolet (UV) sterilization technology is now widely used to replace the addition of sodium hypochlorite. This technology can completely inactivate microorganisms in the water and, by damaging the DNA of the microorganisms, prevents them from regenerating and reproducing. Using this physical sterilization method instead of traditional chemical sterilization is not only more efficient and thorough, but also more environmentally friendly, producing no byproducts or requiring subsequent treatment, and reducing the operating costs of the demineralized water system. However, the UV equipment differs from the existing pipeline structure, making installation inefficient using the original methods. Furthermore, the interfaces of the UV equipment may not be fully compatible with the ports of other pipelines, making direct welding an unsuitable method. Additionally, over time, welding can lead to corrosion at the weld joints due to prolonged contact with the makeup water, causing leaks. Repairing these welds is difficult if the UV equipment is welded to other pipelines. Moreover, the rapid flow of makeup water can cause impact damage to the pipelines when the UV equipment is connected to other pipes. Summary of the Invention:

[0005] To solve the above technical problems, the technical solution adopted is as follows:

[0006] This application provides a method for installing a high-pressure ultraviolet (UV) device in a boiler feedwater system, including the following steps:

[0007] Step 1: From left to right, weld one end of the first pipe 3 to one end of the first eccentric reducer 2, and weld flanges to the other end of the first eccentric reducer 2 and the other end of the first pipe 3 respectively;

[0008] Step 2: Remove the original part of the pipeline and connect the first valve 1, the first eccentric reducer 2 and the first pipe 3 in sequence from the leftmost end at this position, and the medium-pressure ultraviolet device 4. The parts are connected by flanges.

[0009] Step 3: Install the second valve 7 at the rightmost end of the existing pipeline location, and select a second pipe 5 of appropriate length according to the distance between the second valve 7 and the medium-pressure ultraviolet device 4.

[0010] Step 4: From left to right, weld one end of the second eccentric reducer 6 to one end of the second pipe 5, and weld flanges to the other end of the second pipe 5 and the other end of the second eccentric reducer 6 respectively;

[0011] Step 5: From left to right, connect the medium-pressure ultraviolet device 4, the second pipe 5, the combination of the second eccentric reducer 6, and the second valve 7 in sequence, and connect the parts with flanges;

[0012] Step 6: Install support frames for the entire pipeline to complete the installation of the equipment pipeline.

[0013] Furthermore, the length of the original pipeline removed is 2.4 meters, that is, the distance between the left end of the first valve 1 and the right end of the second valve 7 is 2.4 meters.

[0014] Furthermore, the nominal diameter of both the first valve 1 and the second valve 7 is 300 mm, and the length is 80 mm.

[0015] Furthermore, the nominal diameters of the first eccentric reducer 2 and the second eccentric reducer 6 are 300 mm to 350 mm, with the nominal diameter of the larger end being 350 mm and the nominal diameter of the smaller end being 300 mm, and both having a length of 330 mm.

[0016] Furthermore, the nominal diameter of both the first pipe 3 and the second pipe 5 is 350 mm; the sum of the lengths of the first pipe 3 and the second pipe 5 does not exceed 745 mm, and the lengths of both the first pipe 3 and the second pipe 5 are not less than 300 mm.

[0017] Furthermore, the first valve 1 is connected to the small end of the first eccentric reducer 2 via a flange, and the large end of the first eccentric reducer 2 is welded to one end of the first pipe 3; one end of the second pipe 5 is welded to the large end of the second eccentric reducer 6, and the small end of the first eccentric reducer 2 is connected to the second valve 7 via a flange.

[0018] Furthermore, the medium-pressure ultraviolet device 4 has a length of 835 mm.

[0019] Furthermore, multiple triangular support frames 8 are installed at the bottom of the medium-pressure ultraviolet device 4, and each triangular support frame 8 is connected to a rectangular support frame 9 at its bottom; multiple rectangular support frames 10 are respectively installed at the bottom of the first pipe 3 and the second pipe 5.

[0020] Furthermore, a pipe collar 11 is connected to the top of the pipe rectangular support frame 10. The inner diameter of the pipe collar 11 is the same as the outer diameter of the first pipe 3 and the second pipe 5, which can fit and fix the pipe on the pipe rectangular support frame 10.

[0021] Furthermore, both the equipment rectangular support frame 9 and the pipe rectangular support frame 10 are telescopic and their height can be adjusted.

[0022] This application relates to a method for installing a medium-pressure ultraviolet (UV) light device in a boiler feedwater system, which has the following advantages:

[0023] The first valve 1 is connected to the small end of the first eccentric reducer 2, and the large end of the first eccentric reducer 2 is welded to one end of the first pipe 3; one end of the second pipe 5 is welded to the large end of the second eccentric reducer 6, and the small end of the first eccentric reducer 2 is connected to the second valve 7 through a flange; then the two ends of the medium-pressure ultraviolet device 4 are connected through the first pipe 3 and the second pipe 5; the first valve 1 and the second valve 7 are connected to the medium-pressure ultraviolet device 4 through the first eccentric reducer 2 and the second eccentric reducer 6, so that the devices with mismatched sizes can be smoothly connected, ensuring the smooth operation of the pipeline.

[0024] Flanges are used to connect the first valve 1 to the first eccentric reducer 2, the second valve 7 to the second eccentric reducer 6, the first pipeline 3 to the medium-pressure ultraviolet device 4, and the second pipeline 5 to the medium-pressure ultraviolet device 4. This ensures the sealing of the pipeline and prevents corrosion at the pipeline connections. It also makes installation more convenient. Even if there is leakage or damage in some parts of the pipeline, the staff can easily repair or replace the leaking or damaged parts without disassembling the entire pipeline.

[0025] During installation, the first valve 1, the first eccentric reducer 2, and the first pipe 3 assembly, and the medium-pressure ultraviolet device 4 are installed first, followed by the second valve 7. Then, based on the distance between the second valve 7 and the medium-pressure ultraviolet device 4, a second pipe 5 of appropriate length is selected. This avoids the need to reinstall the entire pipeline due to slight dimensional deviations when installing other parts of the pipeline, making the installation method more flexible and improving installation efficiency.

[0026] Connecting a first pipe 3 and a second pipe 5 of a certain length before and after the medium-pressure ultraviolet device 4 restricts the flow velocity of the makeup water in the pipeline to a certain extent, reduces the flow velocity of the makeup water in the pipeline, reduces the impact on the pipeline, and prevents the medium-pressure ultraviolet device 4 from being damaged by the impact, thereby improving the service life of the pipeline.

[0027] A rectangular pipe support frame 10 is installed at the bottom of the first pipe 3 and the second pipe 5. A pipe collar 11 is connected to the top of the rectangular pipe support frame 10 to cover and fix the first pipe 3 and the second pipe 5. Since the outside of the medium-pressure ultraviolet device 4 is not as smooth as the pipe, it is not convenient to use a collar for fixation. Therefore, multiple triangular support frames 8 are installed at the bottom of the medium-pressure ultraviolet device 4, and a rectangular equipment support frame 9 is connected to the bottom of each triangular support frame 8. Both the rectangular equipment support frame 9 and the rectangular pipe support frame 10 are telescopic and can be adjusted in height so that the interface between the first pipe 3, the medium-pressure ultraviolet device 4 and the second pipe 5 is at the same height, which facilitates the installation of the pipeline. Attached image description:

[0028] Figure 1 This is a flowchart illustrating the installation method for a medium-pressure ultraviolet (UV) light source device.

[0029] Figure 2 A structural diagram for pipeline connection and installation;

[0030] Figure 3 A schematic diagram of the structure for installing a support frame for a medium-pressure ultraviolet light device;

[0031] Figure 4 A schematic diagram of the structure for installing the first pipe support frame;

[0032] In the diagram: 1 is the first valve, 2 is the first eccentric reducer, 3 is the first pipe, 4 is the medium-pressure ultraviolet device, 5 is the second pipe, 6 is the second eccentric reducer, 7 is the second valve, 8 is the triangular support frame, 9 is the rectangular support frame for the equipment, 10 is the rectangular support frame for the pipe, and 11 is the pipe collar. Detailed implementation method:

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] The technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0036] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "periphery", "inner perimeter", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "fixing," "connection," and "linking" 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.

[0038] Example 1

[0039] A method for installing a high-pressure ultraviolet (UV) device in a boiler feedwater system is provided, comprising the following steps:

[0040] Step 1: From left to right, weld one end of the first pipe 3 to one end of the first eccentric reducer 2, and weld flanges to the other end of the first eccentric reducer 2 and the other end of the first pipe 3 respectively;

[0041] Step 2: Remove the original part of the pipeline and connect the first valve 1, the first eccentric reducer 2 and the first pipe 3 in sequence from the leftmost end at this position, and the medium-pressure ultraviolet device 4. The parts are connected by flanges.

[0042] Step 3: Install the second valve 7 at the rightmost end of the existing pipeline location, and select a second pipe 5 of appropriate length according to the distance between the second valve 7 and the medium-pressure ultraviolet device 4.

[0043] Step 4: From left to right, weld one end of the second eccentric reducer 6 to one end of the second pipe 5, and weld flanges to the other end of the second pipe 5 and the other end of the second eccentric reducer 6 respectively;

[0044] Step 5: From left to right, connect the medium-pressure ultraviolet device 4, the second pipe 5, the combination of the second eccentric reducer 6, and the second valve 7 in sequence, and connect the parts with flanges;

[0045] Step 6: Install support frames for the entire pipeline to complete the installation of the equipment pipeline.

[0046] Example 2

[0047] Based on Example 1, the installation method has been further defined, while the other steps are the same as in Example 1.

[0048] The original pipeline that was removed was 2.4 meters long, which means that the distance between the left end of the first valve 1 and the right end of the second valve 7 was 2.4 meters.

[0049] The nominal diameter of the first valve 1 and the second valve 7 is 300 mm, and the length is 80 mm.

[0050] The nominal diameters of the first eccentric reducer 2 and the second eccentric reducer 6 are 300 mm to 350 mm, with the nominal diameter of the larger end being 350 mm and the nominal diameter of the smaller end being 300 mm, and both having a length of 330 mm.

[0051] The nominal diameter of the first pipe 3 and the second pipe 5 is 350 mm; the sum of the lengths of the first pipe 3 and the second pipe 5 does not exceed 745 mm, and the lengths of the first pipe 3 and the second pipe 5 are not less than 300 mm.

[0052] Furthermore, the first valve 1 is connected to the small end of the first eccentric reducer 2 via a flange, and the large end of the first eccentric reducer 2 is welded to one end of the first pipe 3; one end of the second pipe 5 is welded to the large end of the second eccentric reducer 6, and the small end of the first eccentric reducer 2 is connected to the second valve 7 via a flange.

[0053] The medium-pressure ultraviolet device 4 is 835 mm long.

[0054] Example 3

[0055] Based on Example 2, the installation method is further defined, while the other steps are the same as in Example 2.

[0056] Triangular support frames 8 are installed on both sides of the bottom of the medium-pressure ultraviolet device 4, and a rectangular support frame 9 is connected to the bottom of each triangular support frame 8; a rectangular support frame 10 is provided on both sides of the bottom of the first pipe 3 and the second pipe 5.

[0057] The top of the rectangular pipe support frame 10 is connected to a pipe collar 11. The inner diameter of the pipe collar 11 is the same as the outer diameter of the first pipe 3 and the second pipe 5, which can fit the pipe and fix it on the rectangular pipe support frame 10.

[0058] Both the equipment rectangular support frame 9 and the pipe rectangular support frame 10 are telescopic and their height can be adjusted.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for installing a high-pressure ultraviolet (UV) light source in a boiler feedwater system, characterized in that, Includes the following steps: Step 1: From left to right, weld one end of the first pipe (3) to one end of the first eccentric reducer (2), and weld flanges to the other end of the first eccentric reducer (2) and the other end of the first pipe (3); Step 2: Remove the original pipeline and connect the first valve (1), the first eccentric reducer (2) and the first pipe (3) in sequence from the leftmost end to the position, and the medium-pressure ultraviolet device (4). The parts are connected by flanges. Step 3: Install a second valve (7) at the rightmost end of the existing pipeline. Select a second pipe (5) of appropriate length based on the distance between the second valve (7) and the medium-pressure ultraviolet device (4). Step 4: From left to right, weld one end of the second eccentric reducer (6) to one end of the second pipe (5), and weld flanges to the other end of the second pipe (5) and the other end of the second eccentric reducer (6); Step 5: From left to right, connect the medium-pressure ultraviolet device (4), the second pipe (5), the combination of the second eccentric reducer (6), and the second valve (7) in sequence, and connect the parts with flanges; Step 6: Install support frames for the entire pipeline to complete the installation of the equipment pipeline; Multiple triangular support frames (8) are installed at the bottom of the medium-pressure ultraviolet device (4), and each triangular support frame (8) is connected to a rectangular support frame (9) at the bottom; multiple rectangular support frames (10) are set at the bottom of the first pipe (3) and the second pipe (5).

2. The installation method of the medium-pressure ultraviolet device in the boiler feedwater system according to claim 1, wherein, The original pipeline that was removed was 2.4 meters long, which means that the distance between the left end of the first valve (1) and the right end of the second valve (7) was 2.4 meters.

3. The installation method of the medium-pressure ultraviolet device in the boiler feedwater system according to claim 2, wherein, The nominal diameter of the first valve (1) and the second valve (7) is 300 mm and the length is 80 mm.

4. The installation method of the high-pressure ultraviolet device in the boiler feedwater system according to claim 3, wherein, The nominal diameters of the first eccentric reducer (2) and the second eccentric reducer (6) are 300 mm to 350 mm, with the nominal diameter of the larger end being 350 mm and the nominal diameter of the smaller end being 300 mm, and both having a length of 330 mm.

5. The installation method of the high-pressure ultraviolet device in the boiler feedwater system according to claim 4, wherein, The nominal diameter of the first pipe (3) and the second pipe (5) is 350 mm; the sum of the length of the first pipe (3) and the length of the second pipe (5) does not exceed 745 mm, and the length of the first pipe (3) and the second pipe (5) is not less than 300 mm.

6. The installation method of the high-pressure ultraviolet device in the boiler feedwater system according to claim 5, wherein, The first valve (1) is connected to the small end of the first eccentric reducer (2) through a flange. The large end of the first eccentric reducer (2) is welded to one end of the first pipe (3). One end of the second pipe (5) is welded to the large end of the second eccentric reducer (6). The small end of the second eccentric reducer (6) is connected to the second valve (7) through a flange.

7. The installation method of the high-pressure ultraviolet device in the boiler feedwater system according to claim 6, wherein, The medium-pressure ultraviolet device (4) is 835 mm long.

8. The installation method of the medium-pressure ultraviolet device in the boiler feedwater system according to claim 1, wherein, The top of the pipe rectangular support frame (10) is connected to a pipe collar (11). The inner diameter of the pipe collar (11) is the same as the outer diameter of the first pipe (3) and the second pipe (5), which can fit the pipe and fix it on the pipe rectangular support frame (10).

9. The method for installing a medium-pressure ultraviolet (UV) device in a boiler feedwater system according to any one of claims 1 or 8, wherein, Both the equipment rectangular support frame (9) and the pipe rectangular support frame (10) are telescopic and their height can be adjusted.

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