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Method for calculating burn-off rate of one-dimensional flame furnace of mixed coal

A calculation method and flame furnace technology are applied to the calculation field of the burnout rate of a one-dimensional flame furnace to achieve the effects of wide adaptability of coal types, small deviation and high accuracy of calculation results.

Pending Publication Date: 2021-11-16
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the shortcoming that the above-mentioned prior art exists, the object of the present invention is to provide a kind of calculation method that obtains the one-dimensional flame furnace burnout rate Bp of blended coal quantitatively according to the burnout rate of blended coal and the blended combustion ratio, suitable for In the case of blending two single types of coal in different proportions

Method used

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  • Method for calculating burn-off rate of one-dimensional flame furnace of mixed coal
  • Method for calculating burn-off rate of one-dimensional flame furnace of mixed coal
  • Method for calculating burn-off rate of one-dimensional flame furnace of mixed coal

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Embodiment 1

[0031] In this embodiment, a method for calculating the burnout rate of a one-dimensional flame furnace of mixed coal comprises the following steps:

[0032] Step 1: Provide the one-dimensional flame furnace burnout rate Bp1(%) of coal type 1 and the one-dimensional flame furnace burnout rate Bp2(%) of coal type 2, the blending ratio R1(%) of coal type 1 and the coal The blending ratio R2 (%) of the second type of coal, wherein R1+R2=100%, wherein the coal type one is the coal type with relatively poor burnout performance compared with the two blended coal types, that is, Bp1

[0033] Coal type one: Bp1=88%, R1=30%;

[0034] Coal type two: Bp=99.8%, R2=70%;

[0035] Step 2: Calculate the weighted average one-dimensional flame furnace burnout rate Bpc(%) of the blended coal, see formula (1) for the specific calculation method;

[0036]

[0037] The calculation result of present embodiment Bpc is as follows:

[0038]

[0039] Step 3: Calculate the nonlinear influen...

Embodiment 2

[0064] In this embodiment, a method for calculating the burnout rate of a one-dimensional flame furnace of mixed coal comprises the following steps:

[0065]Step 1: Provide the one-dimensional flame furnace burnout rate Bp1(%) of coal type 1 and the one-dimensional flame furnace burnout rate Bp2(%) of coal type 2, the blending ratio R1(%) of coal type 1 and the coal The blending ratio R2 (%) of the second type of coal, wherein R1+R2=100%, wherein the coal type one is the coal type with relatively poor burnout performance compared with the two blended coal types, that is, Bp1

[0066] Coal type one: Bp1=88%, R1=70%;

[0067] Coal type two: Bp=99.8%, R2=30%;

[0068] Step 2: Calculate the weighted average one-dimensional flame furnace burnout rate Bpc(%) of the blended coal, see formula (1) for the specific calculation method;

[0069]

[0070] The calculation result of present embodiment Bpc is as follows:

[0071]

[0072] Step 3: Calculate the nonlinear influenc...

Embodiment 3

[0097] In this embodiment, a method for calculating the burnout rate of a one-dimensional flame furnace of mixed coal comprises the following steps:

[0098] Step 1: Provide the one-dimensional flame furnace burnout rate Bp1(%) of coal type 1 and the one-dimensional flame furnace burnout rate Bp2(%) of coal type 2, the blending ratio R1(%) of coal type 1 and the coal The blending ratio R2 (%) of the second type of coal, wherein R1+R2=100%, wherein the coal type one is the coal type with relatively poor burnout performance compared with the two blended coal types, that is, Bp1

[0099] Coal type one: Bp1=98%, R1=70%;

[0100] Coal type two: Bp=99.8%, R2=30%;

[0101] Step 2: Calculate the weighted average one-dimensional flame furnace burnout rate Bpc(%) of the blended coal, see formula (1) for the specific calculation method;

[0102]

[0103] The calculation result of present embodiment Bpc is as follows:

[0104]

[0105] Step 3: Calculate the nonlinear influen...

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Abstract

The invention discloses a method for calculating the burn-off rate of a one-dimensional flame furnace of mixed coal. The method comprises the following steps: 1, obtaining the burn-off rate Bp value and the blending combustion ratio of the one-dimensional flame furnace of two single coal types; 2, calculating the weighted average burn-off rate Bpc of the mixed coal according to the blending combustion proportion; 3, calculating the influence degree delta Bpc of the burnout performance of the blended coal according to the burnout performance of the blended coal and the blended combustion proportion; and 4, finally calculating the burn-off rate Bph of the mixed coal according to Bpc and delta Bpc. According to the method, non-linear influence on the burn-off rate of the mixed coal by the burn-off performance of the mixed coal, the burn-off performance deviation, the mixed burning proportion, wind grabbing of the easy-to-burn coal and the like are fully considered, and finally the method capable of predicting the burn-off rate of the mixed coal one-dimensional flame furnace with high precision is obtained. The method is reliable in data source, wide in coal type application range and suitable for power coal such as anthracite, meagre coal, bituminous coal and lignite. The deviation between the predicted value and the measured value of the mixed coal Bph is within 1%, and the model precision can meet the engineering requirements.

Description

technical field [0001] The invention relates to the technical field of pulverized coal combustion, in particular to a method for calculating the burnout rate of a one-dimensional flame furnace for blending coal, which is applicable to the case where two single types of coal are blended in different proportions. Background technique [0002] The burnout performance of coal is an important characteristic index reflecting the combustion performance of coal. The burnout performance of coal can be judged by the burnout rate Bp of pulverized coal on a one-dimensional flame furnace. The burnout performance of coal is determined by the size of the boiler furnace, the selection of combustion methods, the design of the burner, the determination of the air temperature and velocity of each time, the laying of the combustion belt, the selection of the pulverization system, the operating parameters such as coal fineness, the amount of oxygen in operation, and the Main reference index for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/18G06Q50/06
CPCG06F17/18G06Q50/06
Inventor 刘家利姚伟方顺利张喜来李宇航李兴智李仁义张森王桂芳李炎
Owner XIAN THERMAL POWER RES INST CO LTD
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