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Coal ash contamination characteristic test method

A characteristic test and contamination technology, which is applied in the field of coal ash contamination characteristic test, can solve problems such as unformed

Inactive Publication Date: 2010-02-17
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a special test bench has been established to test the wear performance of fly ash, but a systematic discriminant index has not yet been formed

Method used

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  • Coal ash contamination characteristic test method
  • Coal ash contamination characteristic test method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The first step: Put the Baorixile lignite coal powder into the furnace and add oil for mixed combustion, the ratio is: 10:1, because the flue gas flow after the pulverized coal combustion will contaminate the heating surface passing through, the said heating surface The surface is: screen radiation superheater 8, primary superheater 9, secondary superheater 10, tertiary superheater 11, air preheater 4, after the combustion is stable, blow soot on each heating surface and stabilize for 15 minutes Then record a set of parameters as the parameters before contamination, that is, the data at time 0 in the table below;

[0039] Step 2: Measure the manual measurement parameters every 30 minutes, and the data acquisition instrument collects data every 30 seconds. The data of the first and second steps are detailed in the table below:

[0040]

time

Min

0

30

60

90

120

150 blow

...

Embodiment 2

[0046] Step 1: put Vietnamese anthracite coal powder into the furnace and add oil for co-firing, the ratio is: 50:1, because the flue gas flow after the pulverized coal combustion will contaminate the heating surface that flows through, the heating surface is: Panel radiant superheater 8, primary superheater 9, secondary superheater 10, third-stage superheater 11, air preheater 4, after the combustion is stable, blow soot on each heating surface, and record a The group parameters are used as the parameters before contamination, that is, the data at time 0 in the table below;

[0047] Step 2: Measure the manual measurement parameters every 30 minutes, and the data acquisition instrument collects data every 30 seconds. The data of the first and second steps are detailed in the table below:

[0048] time

Min

0

30

60

90

120

150 blow

gray queen

Coal amount for test coal sample

kg / h

30.41

...

Embodiment 3

[0054] Step 1: Put Shigetai coal powder into the furnace and add oil for co-combustion, the ratio is: 15:1, because the flue gas flow after the combustion of coal powder will contaminate the heating surface that flows through, the heating surface It is: panel radiant superheater 8, first-stage superheater 9, second-stage superheater 10, third-stage superheater 11, air preheater 4, after the combustion is stable, soot blowing is performed on each heating surface, and after 20 minutes of stabilization Record a set of parameters as the parameters before contamination, that is, the data at time 0 in the table below;

[0055] Step 2: Measure the manual measurement parameters every 30 minutes, and the data acquisition instrument collects data every 30 seconds. The data of the first and second steps are detailed in the table below:

[0056]

time

Min

0

30

60

90

120

150 blow

gray qu...

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Abstract

The invention discloses a coal ash contamination characteristic test method. After the coal burns sufficiently, the coal ash contaminates each heating surface, and contaminates each front and back parameter according to each heating surface; the fume temperature of each heating surface is calculated by utilizing formula, and the rate of change of the fume pressure is that psi is equal to k / k0; that psi is equal to k / k0 is taken as the overall index standard to distinguish coal ash contamination, and the index reflects the contamination condition of the coal ash, the smaller the value, indicating that the worse the heat transfer effect, the more serious the contamination. The method of the invention has the characteristics to judge coal ash contamination visually, accurately and reliably, and forms a systematic distinguished index.

Description

technical field [0001] The invention relates to a test method for coal ash contamination characteristics, in particular to a test method for coal ash contamination characteristics. Background technique [0002] The heating surface of the pulverized coal boiler will be contaminated to varying degrees. Generally, after one hour of cleaning the heating surface in the furnace, its heat transfer capacity will drop by 30-60% due to contamination, resulting in abnormal steam temperature and exhaust gas temperature. Increase, boiler efficiency reduction and other problems that affect the economic operation of the unit. When the pollution is serious, it will cause local flue blockage, wear and burst pipes (caused by the formation of smoke corridors) and corrosion burst pipes (caused by alkali metal corrosion due to high NaO content in ash). In 2002, Guohua Panshan Power Plant had a serious accident of boiler fire extinguishing due to the collapse of ash on the heating surface at the...

Claims

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Application Information

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IPC IPC(8): G01N33/22
Inventor 何红光刘家利薛宁蒙毅姚伟王月明王桂芳杨忠灿相大光
Owner XIAN THERMAL POWER RES INST CO LTD
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