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Analytical method for turbine blade salt deposition and scaling ingredient content

A technology for analyzing steam turbine blades and components, applied in the field of analysis, can solve problems such as large errors in detection and analysis of fouling samples, inability to accurately express analysis results, and salt accumulation, and achieve the effects of avoiding errors, complete calculation methods, and overcoming calculation errors.

Active Publication Date: 2012-05-23
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of the current conventional steam turbine blades such as salt accumulation and fouling sample detection and analysis errors, which cannot accurately express the analysis results, etc., and provide a method with simple methods, accurate result analysis, and can meet actual detection needs, etc. Advantageous steam turbine blade salt accumulation and fouling composition analysis and treatment method

Method used

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  • Analytical method for turbine blade salt deposition and scaling ingredient content
  • Analytical method for turbine blade salt deposition and scaling ingredient content
  • Analytical method for turbine blade salt deposition and scaling ingredient content

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Embodiment 1

[0028] 1. Burning reduction (increase) amount S at 450°C 1 % and 900 ℃ ignition loss (increase) amount S 2 %analyze

[0029] Accurately weigh out 0.6000 g of the scale sample of the steam turbine blade, and do an ignition loss (increase) test in a high-temperature furnace at 450 ° C to obtain the ignition loss S 1 % = 0.50%; Ignition loss (increase) test was done in a 900°C high-temperature furnace to obtain the ignition loss S 2 % = 1.50%.

[0030] 2. Chloride ion content Cl in the scale sample - %, fluoride ion content F - %analyze

[0031] Accurately weigh 0.5000 grams of steam turbine blade scale sample, and measure the chloride ion content Cl in the water-soluble scale sample - %=1.00%, fluoride ion content F - %=0.50%, represented by NaCl%, NaF%: NaCl%=1.648×Cl - %=1.648×1.0%=1.648%, NaF%=2.211×F - % = 2.211 x 0.5% = 1.106%.

[0032] 3. Na in the scale sample 2 O percentage analysis

[0033] Accurately weigh 0.2000 g of the scale sample of the steam turbine b...

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Abstract

The invention discloses an analytical and processing method of components of deposited salt and scale of blades of a steam turbine, which can solve the problems of great analysis errors and inaccurate expression of analysis result, etc., of the existing conventional detection of a deposited salt and scale sample of the blades of the steam turbine, and has the advantages of simple method, accurate result analysis and meeting the actual detection needs, etc. The method comprises the following steps: 1) the percentage content by weight of loss on ignition in the scale sample is measured; 2) the percentage content by weight of chloride ions Cl- percent and the percentage content by weight of fluoride ions F- percent in the scale sample are measured and respectively represented by NaCl percent and NaF percent, and the calculating methods are as follows: NaCl percent is equal to 1.648 multiplied by Cl- percent and NaF percent is equal to 2.211 multiplied by F- percent; 3) the percentage content by weight of Na2O in the scale sample is measured, the calculating method is as follows: Na2O percent is equal to 1.348 multiplied by (Na+ percent minus 0.648 multiplied by Cl- percent minus 1.211 multiplied by F- percent); and 4) the calculation results are registered into a set detection table for carrying out the analysis.

Description

technical field [0001] The invention relates to an analysis method, in particular to an analysis and treatment method for steam turbine blade salt accumulation and scaling components. Background technique [0002] The composition of steam turbine blade salt accumulation and fouling is complex, and the samples include water-soluble substances, acid-soluble substances and alkali-soluble substances. The detection process is generally divided into three steps: one is to dissolve the sample and prepare multiple analytical test solutions; the second is to analyze the content of various components in the analytical test solution; the third is to analyze and process the analysis results of various component contents. There are three methods of sample dissolution: water-soluble method, acid-soluble method and alkali-fusion method. The water-soluble method is suitable for water-soluble substances, including sodium hydroxide, sodium carbonate, sodium bicarbonate, chlorides, fluorides,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00G01N5/04G01N27/49G01N21/31G01N30/96
Inventor 周少玲刘颖琳朱舒娜
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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