Method for measuring sulfate ions in scaled component of water vapor system in power station

A sulfate ion and measurement method technology, applied in the field of sulfate ion determination, can solve the problems of poor data reproducibility, poor linearity of test working curve, etc., and achieves reduction of measurement error, accurate and reliable test data, and overcoming poor linearity. Effect

Active Publication Date: 2011-07-20
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
View PDF3 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention is by changing precipitation agent barium chloride (BaCl 2 2H 2 O) form and dose, select new measurement wavelength and cuvette length, overcome the difficult problem...

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
  • Method for measuring sulfate ions in scaled component of water vapor system in power station
  • Method for measuring sulfate ions in scaled component of water vapor system in power station
  • Method for measuring sulfate ions in scaled component of water vapor system in power station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Analysis of power plant scale samples

[0026] The detailed steps are as follows:

[0027] Grind the scale sample finely with an agate mortar, accurately weigh 0.2000 g of the scale sample on an analytical balance, dissolve the scale sample by acid-dissolving or alkali-melting method, and make 500 ml of analytical test solution for use.

[0028] 1. Draw the working curve

[0029] 1.1 Pipette 0.25mg / mL according to Table 1 Pour the working solution into seven 50mL volumetric flasks or colorimetric tubes, dilute to the mark with desalted water, and shake well. Take 7 dry 250mL Erlenmeyer flasks, add 1 magnetic stirrer respectively, and transfer the above working solution to the Erlenmeyer flasks respectively.

[0030] 1.2 Prepare the spectrophotometer, and "colorize" the measurement solutions one by one, and measure them one by one. Put the Erlenmeyer flask on the stirring instrument, add 2.5mL conditional reagent, turn on the stirring instrument for mixing...

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 method for measuring sulfate ions in a scaled component of a water vapor system in a power station, which overcomes the problems that the error of sulfate ion content is big because of the high content of iron ions, the linearity of test working curve is unsatisfactory, the data repeatability is poor, and the linear correlation coefficient r is difficult to reach 0.999. Besides, the invention perfects the test method to ensure that test data is accurate and reliable. The method comprises the following steps: taking a sulfate working solution; diluting the sulfate working solution; adding a condition agent into the solution, and then adding a barium chloride to enable the solution mixture to react and generate barium sulfate sediment; measuring the absorbance A, wherein blank absorbance A0 with the content of sulfate being 0 is deducted from the absorbance A to acquire absorbance (A-A0); drawing a curve according to the smooth curve relationship between the absorbance (A-A0) and the sulfate ion content m (within the range of 0-1.5mg); within the range, establishing a linear regression equation; taking a scaled sample to be measured, and preparing into a solution to be measured; measuring the A0 and A; substituting the A0 and A into the linear regression equation or checking the working curve, thereby acquiring the sulfate ion content; and finally, calculating the sulfuric anhydride content in the scaled sample to be measured.

Description

technical field [0001] The invention relates to a method for determining sulfate ion in scaling components of a water vapor system in a power plant. Background technique [0002] Sulfate is a harmful ion in the water vapor system of thermal power plants. Most of the various water qualities in the water vapor system of power plants, such as make-up water, condensate water, and steam, etc., contain sulfate radicals. During the operation of the unit, if the water vapor quality is not properly controlled, sulfate will be carried by the steam and deposited on the turbine blades. During the overhaul of some units, it was found that scaling components such as steam drums, steam turbine blades, and water wall tubes contained sulfate. Therefore, it is necessary to correctly analyze the sulfate content in scale samples and corrosion products. By analyzing the data, find out the cause of salt accumulation and scale, so as to take measures to improve thermal efficiency and save energy....

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
IPC IPC(8): G01N21/17
Inventor 周少玲
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap