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Coal quality parameter control method for ensuring safe operation of zhundong coal boiler

A technology of safe operation and parameter control, which is applied in the direction of controlling combustion, lighting and heating equipment, fuel, etc., and can solve problems such as lack of clear regulations

Active Publication Date: 2019-05-24
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, whether such Zhundong coal boilers with excellent anti-slag and anti-contamination performance can fully burn Zhundong coal or control the key coal quality indicators of the mixed coal after blending into the furnace is still not clearly regulated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: Whether 100% Tianchi energy coal can be fully burned on the newly designed Zhundong coal boilers with capacity levels of 360MW and 660MW

[0039] Step 1: Calculate the ash content of the coal blended into the furnace by calculating the ash content, ash component content and mass ratio of the blended coal, or test the blended coal according to GB / T1574-2007 coal ash composition analysis method ash content. The ash component specifically includes SiO 2 、Al 2 o 3 , Fe 2 o 3 , CaO, MgO, Na 2 O, K 2 O and TiO 2 .

[0040] In this embodiment, according to the GB / T1574-2007 coal ash component analysis method, the ash component index of the coal mixed into the furnace is tested, specifically including (SiO 2 、Al 2 o 3 , Fe 2 o 3 , CaO, MgO, Na 2 O, K 2 O, TiO 2 );

[0041] In this example, the furnace coal is a single coal type of Tianchi Energy Coal, and the test results of its ash content are as follows:

[0042] SiO 21 =13.54%, Al 2 o 31 =14.7...

Embodiment 2

[0063] Example 2: Whether 90% Tianchi Energy Coal + 10% Alkaline Ditch Coal can be fully burned on the newly designed Zhundong Coal boilers with capacity levels of 360MW and 660MW

[0064] Step 1: Calculate the ash content of the coal blended into the furnace by calculating the ash content, ash component content and mass ratio of the blended coal, or test the blended coal according to GB / T1574-2007 coal ash composition analysis method ash content. The ash component specifically includes SiO 2 、Al 2 o 3 , Fe 2 o 3 , CaO, MgO, Na 2 O, K 2 O and TiO 2 .

[0065] Among them, the calculation method of different ash content of coal blended into the furnace is as follows:

[0066] HY=(R 1 *Y 1 *A ar1 +R 2 *Y 2 *A ar2 +.. . . +R i *Y i *A ari ) / (R 1 *A ar1 +R 2 *A ar2 +.. . . +R i *A ari )

[0067] Among them: HY represents the SiO of mixed coal 2 、Al 2 o 3 , Fe 2 o 3 , CaO, MgO, Na 2 O, K 2 O and TiO 2 The content of a certain ash component in t...

Embodiment 90

[0103] For present embodiment 90% mass ratio Tianchi Energy Coal+10% mass ratio the ash composition of the furnace mixed coal of alkali ditch coal and relevant index meet aforementioned (1) (2) (3) (4) (5) (6) All six, therefore meet the safe combustion requirements.

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PUM

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Abstract

The invention discloses a coal quality parameter control method for ensuring safe operation of a zhundong coal boiler. The coal quality parameter control method applies to the zhundong coal boiler with good slag-bonding resistance and contamination resistance, and fire coal blending of the zhundong coal boiler and blending of annexing agents of kaolin and the like can be guided greatly to improvesafety of boiler operating. The coal quality parameter control method includes the specific steps that 1, the ash composition content of mixed coal into the boiler is obtained by calculating the ash content, the ash composition content, and the blending combustion quality proportion of blending combustion coal types, or the ash composition content of the mixed coal into the boiler is obtained by testing through a GB / T 1574-2007 coal ash composition analyzing method; 2, the basic oxide content HB, the acidic oxide content HA, the alkali acid ratio HB / A, and the HB / A*Na2O index of the mixed coalinto the boiler are calculated; and 3, whether the mixed coal into the boiler can ensure safe operation of the boiler or not is determined according to whether following standards are met simultaneously or not, (1) HNa2O is less than or equal to 4%, (2) HFe2O3 is less than or equal to 10%, when HCaO is greater than 15%, HFe2O3 is less than or equal to 8%, (3) HCaO is less than or equal to 25%, (4) HB is less than or equal to 36%, (5) HB / A is less than or equal to 0.8, and (6) HB / A*Na2O is less than or equal to 2.3%.

Description

technical field [0001] The invention relates to the technical field of safe operation of pulverized coal boilers, in particular to a coal quality parameter control method for ensuring the safe operation of Zhundong coal boilers, which is suitable for Zhundong coal boilers with good anti-slag and anti-contamination performances designed and put into operation in the near future. Coal boilers can be used for coal blending of Zhundong coal boilers or blending of coal and kaolin. Background technique [0002] Zhundong coal is extremely easy to catch fire, easy to burn out, and has low sulfur content. It is an environmentally friendly power coal with excellent combustion performance. Compared with other serious slagging coals in China, the Na in Zhundong coal ash 2 O, CaO, MgO and other basic oxides are high in content, while SiO 2 and Al 2 o 3 The content of acidic oxides is low, and when the boiler burns Zhundong coal, it is prone to severe slagging in the furnace and serio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23N5/00G16C20/10C10L9/10C10L10/04
Inventor 刘家利姚伟方顺利
Owner XIAN THERMAL POWER RES INST CO LTD
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