Optimizing control system for large-scale pulverized coal furnace

An optimization control, pulverized coal furnace technology, applied in the direction of combustion control, coke oven, special form of dry distillation, etc., can solve the problems of not completely solving the conditions for the composition and solution of boiler combustion balance equations, not being able to guarantee validity, and insufficient measured data.

Inactive Publication Date: 2005-04-06
王玷
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AI Technical Summary

Problems solved by technology

According to the application documents, the patent 02110116 scheme does not ignore element N (although the element N content of coal has little effect on combustion, it should be measured because it is related to environmental protection), so the measured data of this scheme is insufficient
Under the condition of ignoring CO, only measure SO 2 , O 2 and fly ash carbon content, there are multiple solutions to the equation system, so one solution obtained by the solution process cannot be guaranteed to be effective
Patent 02110116 measures the low-level calorific value of coal with an error within 2%, and the error of measuring boiler efficiency is also within 2%, because the boiler efficiency itself usually varies within 2%, so the accuracy of the measurement results of patent 02110116 cannot solve the actual problem. problems, and did not reflect the actual situation
[0020] The root cause of the problems in the prior art is that the conditions for the complete composition and solution of the boiler combustion balance equations have not been completely solved in theory

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] According to the scheme of the present invention, the ten conditions adopted in this embodiment are:

[0065] ① The total calorific value of the elements should be equal to the sum of the heat absorption of the boiler and the losses of various items. See formula (12).

[0066] ②The heat balance of the milling system. Calculate M ar .

[0067] ③ The total input of coal is equal to the sum of elements, water and ash. See formula (2).

[0068] ④ Actual measurement of SO in boiler flue gas 2 , the obtained S components in coal and SO in flue gas 2 Components correspond to expressions. See formula (5).

[0069] ⑤ Regression equation or empirical formula of composition among elements (such as H, N). See formula (4).

[0070] ⑥ Regression equation or empirical formula of composition among elements (such as C, O). See (3) type.

[0071] ⑦ Measured O of boiler flue gas 2 Corresponding expressions for the composition of coal are obtained. See formulas (6), (7), (8),...

Embodiment 2

[0148] According to the scheme of the present invention, the ten conditions adopted in this embodiment are:

[0149] ① The total calorific value of the elements should be equal to the sum of the heat absorption of the boiler and the losses of various items. See formula (12).

[0150] ②The heat balance of the milling system. Calculate M ar .

[0151] ③ The total input of coal is equal to the sum of elements, water and ash. See formula (2).

[0152] ④ Actual measurement of SO in boiler flue gas 2 , the obtained S components in coal and SO in flue gas 2 Components correspond to expressions. See formula (5).

[0153] ⑤ Regression equation or empirical formula of composition among elements (such as H, N). See formula (4).

[0154] ⑥ Regression equation or empirical formula of composition among elements (such as C, H). See the formula below.

[0155] h ar =A 3 C ar +B 3 , for anthracite A 3 =-0.448, B 3 = 44.73.

[0156] ⑦ Measured O of boiler flue gas 2 Correspo...

Embodiment 3

[0166] According to the scheme of the present invention, the ten conditions adopted in this embodiment are:

[0167] ① The total calorific value of the elements should be equal to the sum of the heat absorption of the boiler and the losses of various items. See formula (12).

[0168] ②The heat balance of the milling system. Calculate M ar .

[0169] ③ The total input of coal is equal to the sum of elements, water and ash. See formula (2).

[0170] ④ Actual measurement of SO in boiler flue gas 2 , the obtained S components in coal and SO in flue gas 2 Components correspond to expressions. See formula (5).

[0171] ⑤ Regression equation or empirical formula of composition among elements (such as H, N). See formula (4).

[0172] ⑥ Regression equation or empirical formula of composition among elements (such as C, O). See (3) type.

[0173] ⑦ Measured O of boiler flue gas 2 Corresponding expressions for the composition of coal are obtained. See formulas (6), (7), (8),...

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Abstract

This invention relates to a large-scale coal power optimization control system and is mainly used in large power station online coal quality efficiency and optimization control technique field through computer. The system comprises computer hardware and software, original data collection system, optimization result or control order or data output system. The project in this invention can real-time check the burning coal quality and efficiency and loss computation under each given condition.

Description

technical field [0001] The invention relates to an optimization control system for a large pulverized coal boiler, which is mainly used in the technical field of on-line coal quality and efficiency analysis and optimization control of a large pulverized coal combustion boiler of a large power station through a computer. Background technique [0002] The optimal control technology of large pulverized coal fired boilers in large power stations is a worldwide problem. In my country, there are a large number of large pulverized coal fired boilers in large power stations, and the total installed capacity is large, and the capacity of a single unit is gradually approaching the international advanced level. At the same time, due to the abundant coal resources, numerous coal mines, and unstable coal market, compared with developed countries, the types of coal used in power plants are unstable, and the characteristics of coal vary greatly. Therefore, there is a greater need for boile...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): F22B33/18F23N1/02F23N5/00G01N35/00
CPCF22B33/18Y10T436/218F23N1/025F23N5/003F23N2023/42F23N2021/10F23N2221/10F23N2223/42C10B53/00C10L5/04C10L9/08
Inventor王玷
Owner王玷