CN-115750977-B - Method for installing medium-pressure ultraviolet device of boiler makeup water system

CN115750977BCN 115750977 BCN115750977 BCN 115750977BCN-115750977-B

Abstract

The application relates to a method for installing a medium-pressure ultraviolet device of a boiler makeup water system, and belongs to the technical field of installation of power plant equipment. The method comprises the steps of welding a first eccentric big end and a first pipeline from left to right, taking down an original pipeline, sequentially connecting a first valve, a first eccentric big end and a first pipeline combination body and a medium-pressure ultraviolet device from the leftmost end of the original pipeline through a flange, installing a second valve at the rightmost end of the original pipeline, selecting a second pipeline with proper length, welding the second pipeline and the second eccentric big end, sequentially connecting the medium-pressure ultraviolet device, the second pipeline and the second eccentric big end combination body and the second valve through the flange, installing a support frame for the whole pipeline, completing the installation work of the equipment pipeline, enabling the whole pipeline to smoothly run by using the installation method, simultaneously improving the installation efficiency of the pipeline, enabling workers to repair or replace corroded or damaged partial pipelines more conveniently, and reducing the workload.

Inventors

ZHU CHENGXING
YANG QUN
ZHENG YONGFENG
WANG YANQING
LI ZHIHUA
CHEN YAN
CHEN JUNYI
CHEN PINZHOU
Qian Qiufeng
SHI YUE

Assignees

华能苏州热电有限责任公司

Dates

Publication Date: 20260512
Application Date: 20221018

Claims (9)

1. The method for installing the medium-pressure ultraviolet device of the boiler make-up water system is characterized by comprising the following steps of: the first step, from left to right, one end of a first eccentric big end (2) is welded with one end of a first pipeline (3), and the other end of the first eccentric big end (2) and the other end of the first pipeline (3) are respectively welded with flanges; taking down the original part of pipeline, connecting the first valve (1), the first eccentric big-end (2) and the first pipeline (3) assembly and the medium-pressure ultraviolet device (4) in sequence from the leftmost end at the position, and connecting the parts through flanges; A third step of installing a second valve (7) at the rightmost end of the original part of pipeline position, and selecting a second pipeline (5) with proper length according to the distance between the second valve (7) and the medium-pressure ultraviolet device (4); Fourthly, welding one end of a second eccentric big end (6) of a second pipeline (5) from left to right, and respectively welding flanges at the other end of the second pipeline (5) and the other end of the second eccentric big end (6); Fifthly, sequentially connecting a medium-pressure ultraviolet device (4), a second pipeline (5), a second eccentric big-small head (6) assembly and a second valve (7) from left to right, wherein the parts are connected through flanges; Step six, installing a supporting frame for the whole pipeline to finish the installation work of the equipment pipeline; A plurality of triangular support frames (8) are arranged at the bottom of the medium-pressure ultraviolet device (4), equipment rectangular support frames (9) are respectively connected to the bottom of each triangular support frame (8), and a plurality of pipeline rectangular support frames (10) are respectively arranged at the bottoms of the first pipeline (3) and the second pipeline (5).
2. The method for installing a medium pressure ultraviolet ray device of a boiler makeup water system according to claim 1, wherein the length of the removed original pipeline is 2.4 meters, namely, the distance between the left end of the installed first valve (1) and the right end of the installed second valve (7) is 2.4 meters.
3. The method for installing a medium pressure ultraviolet device of a boiler makeup water 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. A method of installing a medium pressure uv device in a boiler make-up water system according to claim 3, wherein the nominal diameter of the first eccentric size head (2) and the second eccentric size head (6) is 300 mm to 350 mm, the nominal diameter of the large head end is 350 mm, the nominal diameter of the small head end is 300 mm, and the lengths are 330 mm.
5. The method for installing a medium pressure ultraviolet device in a boiler makeup water system according to claim 4, wherein the nominal diameters of the first pipe (3) and the second pipe (5) are 350 mm, the sum of the length of the first pipe (3) and the length of the second pipe (5) is not more than 745 mm, and the lengths of the first pipe (3) and the second pipe (5) are not less than 300 mm.
6. The installation method of the medium pressure ultraviolet device of the boiler make-up water system, according to claim 5, wherein the first valve (1) is connected with the small end of the first eccentric big end (2) through a flange, the large end of the first eccentric big end (2) is welded with one end of the first pipeline (3), one end of the second pipeline (5) is welded with the large end of the second eccentric big end (6), and the small end of the second eccentric big end (6) is connected with the second valve (7) through a flange.
7. The method for installing a medium pressure ultraviolet ray device in a boiler make-up water system according to claim 6, wherein the length of the medium pressure ultraviolet ray device (4) is 835 mm.
8. The installation method of the medium pressure ultraviolet device of the boiler makeup water system according to claim 1, wherein the top of the rectangular pipeline support frame (10) is connected with a pipeline sleeve ring (11), the inner diameter of the pipeline sleeve ring (11) is the same as the outer diameters of the first pipeline (3) and the second pipeline (5), and the pipeline can be sleeved and fixed on the rectangular pipeline support frame (10).
9. The installation method of the medium pressure ultraviolet device of the boiler make-up water system according to any one of claims 1 or 8, wherein the rectangular equipment support frame (9) and the rectangular pipeline support frame (10) are telescopic and can be adjusted in height.

Description

Method for installing medium-pressure ultraviolet device of boiler makeup water system Technical field: the application belongs to the technical field of installation of power plant equipment, and particularly relates to an installation method of a medium-pressure ultraviolet device of a boiler makeup water system. The background technology is as follows: the source of boiler makeup water is typically tap water or surface water, which, although subjected to a clean water pretreatment process, is visually clear and transparent with many bacteria and microorganisms that are not visible to the naked eye. In order to remove bacteria and microorganisms in water, a boiler water supplementing system adopts a method of adding sodium hypochlorite, a reducing agent is added to remove residual chlorine in the water, and a non-oxidizing bactericide is added to play a role in sterilization, so that the breeding of microorganisms and the pollution and blockage of a subsequent filter and a membrane element are reduced. However, microorganisms are resistant to chlorine and non-oxidizing bactericides, and non-oxidizing bactericides are not effective against all types of microorganisms, and the microorganisms that are not killed still grow rapidly and cause fouling. For this reason, high-intensity medium-pressure ultraviolet sterilization technology is currently used to replace the method of adding sodium hypochlorite, so that microorganisms in water can be completely deactivated, and the microorganisms cannot be regenerated, repaired and propagated due to the damage to the DNA of the microorganisms. The physical sterilization mode replaces the traditional chemical agent sterilization, so that the sterilization effect is more efficient and thorough, the environment is protected, no byproducts are generated, no subsequent treatment is generated, and meanwhile, the operation production cost of the demineralized water system is reduced. The ultraviolet equipment is different from the original pipeline structure, the original pipeline installation method is used, the installation efficiency is low, the ports of the ultraviolet equipment and other pipelines are not completely matched, the ports are directly connected in a welding mode, meanwhile, the pipelines are connected through a simple welding method, long-term contact corrosion of the welding part and the makeup water can occur to cause leakage of the makeup water in the pipelines, if the ultraviolet equipment is connected with other pipelines in a welding mode, the welding part is not easy to repair, meanwhile, the simple pipeline connection is adopted, and the ultraviolet equipment and other pipelines can be damaged due to impact caused by the fact that the flow speed of the makeup water is too fast. The invention comprises the following steps: In order to solve the technical problems, the adopted technical scheme is as follows: The application provides a method for installing a medium-pressure ultraviolet device of a boiler makeup water system, which comprises the following steps: the first step, from left to right, one end of a first eccentric big-end 2 is welded with one end of a first pipeline 3, and the other end of the first eccentric big-end 2 and the other end of the first pipeline 3 are respectively welded with flanges; taking down the original part of pipelines, and sequentially connecting a first valve 1, a first eccentric big-end-head 2, a first pipeline 3 assembly and a medium-pressure ultraviolet device 4 from the leftmost end at the position, wherein all parts are connected through flanges; A third step of installing a second valve 7 at the rightmost end of the original part of pipeline position, and selecting a second pipeline 5 with proper length according to the distance between the second valve 7 and the medium-pressure ultraviolet device 4; fourthly, welding one end of a second eccentric big end 6 from left to right, and respectively welding flanges at the other end of the second pipeline 5 and the other end of the second eccentric big end 6; fifthly, sequentially connecting a medium-pressure ultraviolet device 4, a second pipeline 5, a second eccentric big-and-small head 6 assembly and a second valve 7 from left to right, wherein the parts are connected through flanges; and sixthly, installing a supporting frame for the whole pipeline to finish the installation work of the equipment pipeline. Further, the length of the removed original pipeline is 2.4 meters, namely, the distance between the left end of the installed first valve 1 and the right end of the installed second valve 7 is 2.4 meters. Further, the nominal diameters of the first valve 1 and the second valve 7 are 300 mm and the lengths thereof are 80 mm. Further, the nominal diameter of the first eccentric big end 2 and the second eccentric big end 6 is 300 mm to 350 mm, the nominal diameter of the big end is 350 mm, the nominal diameter of the small end is 300 mm, and the length is 330 mm. F