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Method for calculating ratio of fly ash to large slag based on mercury concentration measurement

A mercury concentration, fly ash technology, applied in the direction of measuring devices, fuel oil testing, instruments, etc., can solve the problems of reducing test uncertainty, reducing measurement work, unable to accurately measure ash and slag mass flow, etc., to eliminate measurement uncertainty big effect

Pending Publication Date: 2022-01-28
XIAN THERMAL POWER RES INST CO LTD
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Problems solved by technology

[0003] In order to overcome the above technical problems, the present invention provides a method for calculating the proportion of fly ash and large slag based on mercury concentration measurement, which replaces the measurement work of fly ash and slag mass flow through the laboratory analysis of mercury element content in various related substances, The basic formula of mercury balance and the iterative calculation method are used to determine the "ash-slag ratio" r, which reduces the complicated measurement work, reduces the uncertainty of the test, and solves the problem that the existing technology cannot accurately measure the mass flow rate of ash and slag

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  • Method for calculating ratio of fly ash to large slag based on mercury concentration measurement
  • Method for calculating ratio of fly ash to large slag based on mercury concentration measurement

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[0045] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0046] see figure 1 , a kind of method of calculating fly ash and large slag ratio based on mercury concentration measurement of the present invention, comprises the following steps:

[0047] According to the method stipulated in ASME PTC 4-2013 "Boiler Performance Test Regulations", the fuel, fly ash and bottom slag were sampled respectively;

[0048] Industrial analysis, elemental analysis and concentration of heavy metal mercury in fuel to analyze the fuel entering the boundary of the boiler using a mercury analyzer;

[0049] Use a mercury analyzer to analyze the mercury concentration in the fly ash and bottom slag leaving the boiler boundary;

[0050] Among them, the basic formula for boiler mercury balance based on the conservation of mercury element is:

[0051] m Hg(fuel) =m Hg(fa) +m Hg(sa) +m Hg(fg) (1)

[0052] In the formula: m Hg(fuel) —...

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Abstract

The invention discloses a method for calculating the ratio of fly ash to large slag based on mercury concentration measurement. The measurement work of the mass flow of fly ash and slag is replaced by the test analysis of the mercury element content of each related substance, and the ash-slag ratio r is determined by adopting a mercury balance basic formula and an iterative calculation method. Based on the method, the measurement work of the fly ash mass flow and the slag mass flow is omitted, the influence of large uncertainty of mass flow measurement is eliminated, the unburned carbon heat loss can be calculated more conveniently and accurately, and the boiler combustion condition can be evaluated more conveniently and accurately. In addition, the recycling value of the fly ash can be further analyzed and evaluated through test analysis data of ash elements.

Description

technical field [0001] The invention belongs to the technical field of coal-fired power generation measurement, and in particular relates to a method for calculating the proportion of fly ash and large slag based on mercury concentration measurement. Background technique [0002] The ash in the thermal coal is converted into slag and fly ash after being burned in the boiler, the slag is discharged in the slag discharger, and the fly ash is carried out of the furnace by the flue gas. The content of combustibles in fly ash and slag can reflect the combustion conditions of the boiler, such as the burnout degree of pulverized coal and combustion efficiency. The precise measurement of boiler efficiency often adopts the heat loss method, and the most important thing for the heat loss of unburned carbon is to measure the average combustibles in the ash. It is also necessary to measure the distribution of ash and slag exiting the furnace. From the perspective of measurement, the m...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/22
CPCG01N33/222
Inventor 赵元财王慧青梁丽萍徐远纲孟勇赵永坚赵杰
Owner XIAN THERMAL POWER RES INST CO LTD
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