Method for detecting content of gypsum particles in smoke of desulphuration outlet

A technology of particle content and detection method, which is applied in the field of electric power industry, can solve the problems of inability to reflect the real situation of the flue and inaccurate detection, and achieve the effect of reducing accidental errors and ensuring accuracy

Active Publication Date: 2017-08-18
CHINA DATANG CORP SCI & TECH RES INST CO LTD EAST CHINA BRANCH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, since the accuracy of the droplet test is yet to be considered, and the empirical value of 6% of the solid content depends on different equipment and coal quality, this method for detecting gypsum in flue gas is very inaccurate and cannot reflect smoke The real situation in the Tao

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  • Method for detecting content of gypsum particles in smoke of desulphuration outlet
  • Method for detecting content of gypsum particles in smoke of desulphuration outlet
  • Method for detecting content of gypsum particles in smoke of desulphuration outlet

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Embodiment 1

[0040] Such as figure 1 As shown, a method for detecting the content of gypsum particles in the desulfurization outlet flue gas of the present embodiment includes the following steps:

[0041](1) Use two heatable smoke sampling guns with built-in glass fiber filter membranes (the operating temperature is 100°C) to take 1000L of flue gas in the same measuring hole at the desulfurization outlet; the glass fiber filter membrane has a pore size of 0.24 The μm glass fiber filter membrane is made of silica and does not contain calcium ions and sulfate ions;

[0042] (2) Take off the glass fiber filter membrane in the smoke sampling gun, weigh the original mass m of the gypsum sample intercepted on the glass fiber filter membrane 0 , and then dry the moisture contained in it at 230°C±5°C to obtain the mass m of the dried sample 1 ; Next, using the formula m 2 =m 1 -m 0 Calculate the total water of crystallization content m in this gypsum sample 2 , CaSO 3 0.5H 2 O, CaSO 4 2H...

Embodiment 2

[0057] Such as figure 1 As shown, a method for detecting the content of gypsum particles in the desulfurization outlet flue gas of the present embodiment includes the following steps:

[0058] (1) Use at least two heatable smoke sampling guns with built-in glass fiber filter membranes (use temperature is 105°C) to take 2000L volume of flue gas from the same measuring hole at the desulfurization outlet; 0.24μm glass fiber filter membrane, made of silica, does not contain calcium ions and sulfate ions;

[0059] (2) Take off the glass fiber filter membrane in the smoke sampling gun, weigh the original mass m of the gypsum sample intercepted on the glass fiber filter membrane 0 , and then dry the moisture contained in it at 230°C±5°C to obtain the mass m of the dried sample 1 ; Next, using the formula m 2 =m 1 -m 0 Calculate the total water of crystallization content m in this gypsum sample 2 , CaSO 3 0.5H 2 O, CaSO 4 2H 2 The sum of the mass of crystallization water car...

Embodiment 3

[0074] Such as figure 1 As shown, a method for detecting the content of gypsum particles in the desulfurization outlet flue gas of the present embodiment includes the following steps:

[0075] (1) Use at least two heatable smoke sampling guns with built-in glass fiber filter membranes (the operating temperature is 110°C) to take 5000L of flue gas in the same measuring hole at the desulfurization outlet; 0.24μm glass fiber filter membrane, made of silica, does not contain calcium ions and sulfate ions;

[0076] (2) Take off the glass fiber filter membrane in the smoke sampling gun, weigh the original mass m of the gypsum sample intercepted on the glass fiber filter membrane 0 , and then dry the moisture contained in it at 230°C±5°C to obtain the mass m of the dried sample 1 ; Next, using the formula m 2 =m 1 -m 0 Calculate the total water of crystallization content m in this gypsum sample 2 , CaSO 3 0.5H 2 O, CaSO 4 2H 2 The sum of the crystal water mass carried by O;...

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Abstract

The invention discloses a method for detecting the content of gypsum particles in smoke of a desulphuration outlet. The method comprises the following steps: taking smoke from a measuring hole at the desulphuration outlet by using a smoke sampling gun with a built-in glass fiber filter membrane; taking down the glass fiber filter membrane in the smoke sampling gun, and acquiring the total crystal water content m<2> in a gypsum sample; acquiring the molar weight of total CaSO4 by a 'sulfur trioxide determining-barium sulphate gravimetric method' in section 11 in GB/T5485-2012 and a formula; acquiring the mass X1 of CaSO4.2H20 in the gypsum sample by a linear equation in two unknowns; calculating the content of the gypsum particles in the smoke; and verifying whether the data are qualified or not. The method has the advantage that the method for detecting the content of the gypsum particles in the smoke of the desulphuration outlet is simple, practical, rapid and accurate.

Description

technical field [0001] The invention relates to the field of electric power industry, in particular to a method for detecting the content of gypsum particles in desulfurization outlet flue gas. Background technique [0002] (Guoneng Security [2014] No. 161) Item 25 "Prevention of Major Environmental Pollution Accidents" in "Twenty-five Key Requirements for Preventing Major Accidents in Electric Power Production" clearly requires power plants to regularly monitor the gypsum content in the exhaust gas Detection to prevent gypsum particles from being carried by the flue gas. [0003] The current scheme is mainly to use the droplet collector to collect the fog droplets at the chimney inlet, calculate the droplet content in the flue gas by the magnesium ion tracer method, and calculate the gypsum content by 6% of the empirical value of the solid content of the droplets . [0004] However, since the accuracy of the droplet test is yet to be considered, and the empirical value of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04G01N31/02
CPCG01N5/04G01N5/045G01N31/02
Inventor 汪鑫张达光俞立钱新凤罗小宇黄本宏
Owner CHINA DATANG CORP SCI & TECH RES INST CO LTD EAST CHINA BRANCH
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