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Ingredient content analytical method for turbine blade salt deposition and scaling

A technology of a steam turbine blade and an analysis method, applied in the field of analysis and testing, can solve problems such as inaccurate detection methods, inability to obtain reliable data, etc., and achieve the effects of avoiding difficult expressions and large errors, complete calculation methods, and overcoming calculation errors.

Active Publication Date: 2010-06-30
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of inaccuracy and inability to obtain reliable data in the existing detection methods, and provide a method for analyzing the content of salt deposits and scaling components in steam turbine blades, which has the advantages of simple method, easy operation, accurate and reliable detection results, etc.

Method used

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  • Ingredient content 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

Examples

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Effect test

Embodiment 1

[0048] 1. Burning reduction (increase) amount S at 450°C 1 % and 900 ℃ ignition loss (increase) amount S 2 %

[0049] 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

[0050] 2. Chloride ion content Cl in the scale sample - %, fluoride ion content F - %analyze

[0051] 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 and NaF: NaCl%=1.648×Cl - %=1.648×1.0%=1.648%, NaF%=2.211×F - % = 2.211 x 0.5% = 1.106%.

[0052] 3. Na in the scale sample 2 O percentage analysis

[0053] Accurately weigh 0.2000 g of the scale sample of the steam turbine blade, an...

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Abstract

The invention discloses a method for analyzing the salification and scale formation component content of the vanes of a steam turbine, which comprises the following steps: scale sample is weighed and dried, and water content is measured; the ignition increment S1 percent and decrement S2 percent of the scale sample at 450 DEG C and 900 DEG C are measured; the contents of sodium ions and potassiumions in the acid soluble scale sample component are measured; the content of chloride ions CI<-> percent, the content of fluorine ions F<-> percent, the content of sulfuric anhydride SO3 percent, thecontent of phosphoric oxide P2O5 percent, the content of ferric oxide Fe2O3 percent, the content of alumina AI2O3 percent, the content of copper oxide CuO percent, the content of calcium oxide CaO percent and the content of magnesium oxide MgO percent in the scale sample are measured; the full silica content in the alkaline fusion component of the scale sample is measured and presented by SiO2 percent; the percentage contents of NaCI, NaF and Na2O are calculated; compared with the current method for analyzing the scale and corrosion products of heat power plants, the adoption of the method ofthe invention to analyze the salification and scale formation component content of the vanes of the steam turbine can obtain more accurate and reliable data.

Description

technical field [0001] The invention belongs to the technical field of analysis and testing, and in particular relates to a method for analyzing the contents of salt deposits and fouling components in steam turbine blades. Background technique [0002] Once scaling and corrosion occur in thermal equipment, it will seriously endanger the safe and economical operation of thermal equipment. Therefore, it is necessary to correctly analyze the composition of scale and corrosion products and provide reliable data in order to take correct measures to prevent scaling and corrosion or carry out effective chemical cleaning. In recent years, through the inspection of thermal equipment, it is found that the steam turbine blades have salt accumulation and scaling. Therefore, it is necessary to analyze the salt accumulation and scaling components of the steam turbine blades in order to find out the reasons and take measures. [0003] Salt deposits and scaling on steam turbine blades cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04
Inventor 周少玲封展旗齐达立
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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