Method for calculating ignition temperature of mixed pulverized coal airflow after blending combustion of two single coals

A technology of ignition temperature and coal type, which is applied in the field of calculation of ignition temperature of mixed coal pulverized coal airflow after blending of two single types of coal, can solve the problem of complex ignition performance of blended coal, unsatisfactory blending of coal, lack of quantitative research, etc. problems, to achieve the effect of a wide range of coal types, simple and fast calculation methods, and easy popularization and application

Pending Publication Date: 2020-10-30
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ignition performance of blended coal is complex, and has a nonlinear relationship with the ignition performance of blended coal types, and cannot be obtained by simple weighted average
However, it takes a long time to send coal samples to professional testing institutions for testing, and the testing data often lags behind the boiler operation, which cannot meet the current requirements of intelligent coal blending and blending.
At present, relevant institutions have conducted a lot of research on the ignition performance of coal blends, but most of them are qualitative researches, and there is no quantitative research, which cannot meet the needs of coal blending, especially intelligent coal blending.

Method used

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  • Method for calculating ignition temperature of mixed pulverized coal airflow after blending combustion of two single coals
  • Method for calculating ignition temperature of mixed pulverized coal airflow after blending combustion of two single coals
  • Method for calculating ignition temperature of mixed pulverized coal airflow after blending combustion of two single coals

Examples

Experimental program
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Effect test

specific Embodiment example 1

[0031] Specific implementation case 1, typical lignite and anthracite blended coal pulverized coal gas flow ignition temperature IT, ℃:

[0032] Step 1: Provide the ignition temperature IT1 (°C) of the pulverized coal flow of coal type 1 and the ignition temperature IT2 (°C) of the pulverized coal flow of coal type 2, the blending ratio R1 (%) of coal type 1 and the blending ratio of coal type 2 Combustion ratio R2 (%), wherein R1+R2=100%, wherein coal type 1 is the coal type with excellent ignition performance, that is, the ignition temperature of the pulverized coal flow of coal type 1 is lower than the ignition temperature of the pulverized coal flow of coal type 2;

[0033] Lignite IT1=450°C, anthracite IT2=830°C;

[0034] Lignite blending ratio R1 = 5%, anthracite blending ratio R2 = 95%,

[0035] Step 2: Calculate the weighted average pulverized coal airflow ignition temperature ITc (in °C) of the mixed coal after coal type 1 and coal type 2 are mixed. For the specific ...

specific Embodiment example 2

[0054] Specific implementation case 2, typical bituminous coal and anthracite blended coal pulverized coal flow ignition temperature IT, ℃:

[0055] Step 1: Provide the ignition temperature IT1 (°C) of the pulverized coal flow of coal type 1 and the ignition temperature IT2 (°C) of the pulverized coal flow of coal type 2, the blending ratio R1 (%) of coal type 1 and the blending ratio of coal type 2 Combustion ratio R2 (%), wherein R1+R2=100%, wherein coal type 1 is the coal type with excellent ignition performance, that is, the ignition temperature of the pulverized coal flow of coal type 1 is lower than the ignition temperature of the pulverized coal flow of coal type 2;

[0056] Lignite IT1=450°C, anthracite IT2=830°C;

[0057] Lignite blending ratio R1 = 80%, anthracite blending ratio R2 = 20%,

[0058] Step 2: Calculate the weighted average pulverized coal airflow ignition temperature ITc (in °C) of the mixed coal after coal type 1 and coal type 2 are mixed. For the spec...

specific Embodiment example 3

[0077] Specific implementation case 3, the ignition temperature IT of pulverized coal airflow after the blending of typical lignite and bituminous coal, °C:

[0078] Step 1: Provide the ignition temperature IT1 (°C) of the pulverized coal flow of coal type 1 and the ignition temperature IT2 (°C) of the pulverized coal flow of coal type 2, the blending ratio R1 (%) of coal type 1 and the blending ratio of coal type 2 Combustion ratio R2 (%), wherein R1+R2=100%, wherein coal type 1 is the coal type with excellent ignition performance, that is, the ignition temperature of the pulverized coal flow of coal type 1 is lower than the ignition temperature of the pulverized coal flow of coal type 2;

[0079] Lignite IT1=380°C, anthracite IT2=640°C;

[0080] Lignite blending ratio R1 = 80%, anthracite blending ratio R2 = 20%,

[0081] Step 2: Calculate the weighted average pulverized coal airflow ignition temperature ITc (in °C) of the mixed coal after coal type 1 and coal type 2 are mi...

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Abstract

The invention discloses a method for calculating the ignition temperature of mixed pulverized coal airflow after blending combustion of two single coal types, and the method comprises the following steps: firstly, providing the ignition temperature and blending combustion ratio of the pulverized coal airflow of a blending combustion coal type 1 and a blending combustion coal type 2; then calculating the blending combustion coal type proportion, the blending combustion coal type ignition performance and the nonlinear influence of the blending combustion coal type ignition performance deviationon the blended coal ignition temperature; and finally, predicting the pulverized coal airflow ignition temperature IT of the mixed coal. According to the method, through a large number of laboratory mixed coal combustion performance test results, the correlation between the mixed coal ignition performance and the blending combustion coal type is found through research, and then the nonlinear influence relation of the mixed coal ignition performance is quantitatively given. The calculation method is simple, rapid and high in precision, in the coal blending combustion process, real-time ignitionperformance analysis and evaluation can be conducted according to existing coal quality data, coal blending combustion and operation optimization of a power plant can be guided in time, and the method is convenient to apply and popularize in daily coal blending combustion and intelligent coal blending combustion of the power plant.

Description

technical field [0001] The invention relates to the technical field of calculating the ignition temperature IT of pulverized coal airflow, in particular to a calculation method for the ignition temperature of mixed pulverized coal airflow after two single types of coal are blended. Background technique [0002] The ignition performance of coal is an important characteristic index reflecting the combustion performance of coal, and the ignition temperature of coal is usually used to judge the ignition performance of coal. The ignition performance of coal is the main reference index for the selection of boiler combustion mode, burner design, determination of each air temperature and wind speed, laying of hygienic combustion belt, selection of pulverizing system, and optimization of operating parameters. In order to meet the needs of power plants to reduce fuel costs and deep peak regulation, more and more power plants need to improve the economy, safety and environmental protec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F119/08
CPCG06F30/20G06F2119/08
Inventor 刘家利方顺利张森屠竞毅姚伟王桂芳
Owner XIAN THERMAL POWER RES INST CO LTD
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