Nuclear power plant auxiliary steam and steam turbine shaft seal steam pipeline joint purging method

A technology of auxiliary steam and shaft seal steam, which is applied in the direction of chemical instruments and methods, cleaning methods and utensils, cleaning hollow objects, etc., can solve the problems of power station inconvenience, installation and dismantling consume a lot of manpower and time, and occupy power station space, etc., to achieve Effects of improving cleanliness, shortening blowing time, and reducing use time

Inactive Publication Date: 2020-10-09
SANMEN NUCLEAR POWER CO LTD
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both the auxiliary steam pipeline and the shaft seal steam pipeline need to add more temporary measures such as pipes and valves. The installation and removal of temporary measures will consume a lot of manpower and time; in addition, the existence of temporary measures will occupy a lot of space in the power plant building, and The purge pipes are high-temperature and high-pressure pipes, which brings great inconvenience to the development of other work in the power station

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nuclear power plant auxiliary steam and steam turbine shaft seal steam pipeline joint purging method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] A method for combined purging of nuclear power plant auxiliary steam and steam turbine shaft seal steam pipelines, comprising the following steps:

[0034] Step 1, remove the regulating valve, the filter element of the filter screen and the filter element of the check valve in the pipeline;

[0035] Step 2, only open the pipeline valve on the path to be purged;

[0036] Step 3, start the auxiliary boiler, and gradually open the steam isolation valve to purge the pipeline until the black or brown color of the steam at the outlet of the pipeline disappears, then close the steam isolation valve;

[0037] Step 4, install or replace the target plate at the outlet of the pipeline, gradually open the steam isolation valve, purge the pipeline for a period of time, close the steam isolation valve, check the target plate index and judge...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a nuclear power plant auxiliary steam and steam turbine shaft seal steam pipeline joint purging method, and belongs to the technical field of nuclear power plant pipeline steampurging. The nuclear power plant auxiliary steam and steam turbine shaft seal steam pipeline joint purging method comprises the following steps that firstly, an adjusting valve in a pipeline, a filter element of a filter net and a filter element of a check valve are moved out; secondly, only a pipeline valve on a to-be-purged path is opened; thirdly, an auxiliary boiler is started, a steam isolation valve is gradually opened so as to conduct purging into the pipeline till the black or the brown of the steam at the pipeline outlet position disappears, and the steam isolation valve is closed; fourthly, installation or replacement of a target plate is conducted at the pipeline outlet position, the steam isolation valve is gradually opened, purging is conducted into the pipeline for a periodof time, the steam isolation valve is closed, the target plate index is detected, and whether the requirement is met or not is judged; and fifthly, the fourth step is repeatedly conducted till it is detected that two continuous purging results meet the requirement. By means of the nuclear power plant auxiliary steam and steam turbine shaft seal steam pipeline joint purging method, the nuclear power plant auxiliary steam and steam turbine shaft seal steam supply pipeline purging quality can be effectively improved, the purging time is shortened, and the purging cost is reduced.

Description

technical field [0001] The invention relates to the technical field of steam purging of nuclear power plant pipelines, in particular to a method for combined purging of nuclear power plant auxiliary steam and steam turbine shaft seal steam pipelines. Background technique [0002] Auxiliary steam plays a very important role in the operation of nuclear power plants. The use of auxiliary steam runs through a series of engineering stages of nuclear power plants from start-up to operation, shutdown and maintenance, and provides indispensable support for the normal operation of nuclear power plants. At present, the second and third generation nuclear power plants currently in operation in China and under construction are all equipped with auxiliary steam systems. The main function of the auxiliary steam system is to meet the start-up steam demand of nuclear power units. During the low load level of the power station start-up on the conventional island side, auxiliary steam is nee...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B08B9/032B08B13/00
CPCB08B9/0328B08B13/00B08B2209/032
Inventor 王雄翟小飞楼安平王保田刘超赵海龙
Owner SANMEN NUCLEAR POWER CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products