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On-line soft measurement method and device for calorific value of raw coal fed into coal-fired boiler

A coal-fired boiler and soft measurement technology, which is applied in the fields of measurement and testing, combustion and combustion equipment, can solve the problem of non-real-time calculation, achieve high real-time performance, improve real-time performance, and strong adaptability

Active Publication Date: 2022-06-24
JIANGSU FRONTIER ELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the deficiencies in the prior art, the present invention provides an online soft-sensing method and device for the calorific value of raw coal in a coal-fired boiler, which solves the problem that the existing online soft-sensing method needs to collect a large amount of data and perform a large number of calculations not in real time

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  • On-line soft measurement method and device for calorific value of raw coal fed into coal-fired boiler
  • On-line soft measurement method and device for calorific value of raw coal fed into coal-fired boiler
  • On-line soft measurement method and device for calorific value of raw coal fed into coal-fired boiler

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Effect test

Embodiment 1

[0041] An online soft measurement method for the calorific value of raw coal fed into a coal-fired boiler, comprising the steps of:

[0042] Step 1, collect boiler operation data, and preprocess the boiler operation data;

[0043] The boiler operation data includes: the total air volume of the boiler operation, the total coal volume of the boiler operation, the oxygen volume of the boiler operation, and the negative pressure of the furnace (optional);

[0044] The total air volume of boiler operation refers to the sum of primary air volume and secondary air volume of each coal mill; the total coal volume of boiler operation refers to the sum of coal feeding volume of each coal feeder.

[0045] The method of collecting boiler operation data includes: collecting the boiler operation data by the meter installed on site, accessing the analog signal of each parameter, or obtaining the boiler operation data from the data acquisition system or the relevant database of the plant-level...

Embodiment 2

[0062] An online soft measuring device for the calorific value of raw coal fed into a coal-fired boiler, comprising:

[0063] Online data acquisition unit for collecting boiler operation data;

[0064] The data preprocessing unit is used to preprocess the boiler operation data;

[0065] The calorific value calculation unit is used to calculate the high-level calorific value of the coal-fired boiler into the furnace based on the pre-processed boiler operation data and the received base calorific value of the coal-fired boiler; The multiple relationship of the raw coal received base low calorific value;

[0066] The model correction unit is used to correct the calculation model.

[0067] Further, the calculation model is:

[0068]

[0069] Of which: Q ar,gr is the received base high calorific value of raw coal, MJ / kg; Q is the total air volume of boiler operation, t / h; B is the total coal volume of boiler operation, t / h; O 2 is the oxygen amount of boiler operation, %; Δ...

Embodiment 3

[0071] In order to compare the difference between the calculated result and the actual calorific value, this embodiment uses data of several stable working conditions.

[0072] An online soft measurement method for the calorific value of raw coal fed into a coal-fired boiler, comprising the steps of:

[0073] Step 1, collect boiler operation data, and preprocess the boiler operation data;

[0074] The total air volume, total coal volume, and oxygen volume data of the boiler are collected. The data collected under each working condition are preprocessed as shown in Table 1. The data listed in Table 1 is the average value of each working condition, which can be considered to be filtered by the average value. data, and in addition to oxygen, total air and total coal volumes have been preprocessed from the raw measurements.

[0075] The total air volume of the boiler is the sum of the primary air volume and the secondary air volume of each coal mill during the operation of the bo...

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Abstract

The invention discloses an online soft measurement method and device for the calorific value of raw coal fed into a coal-fired boiler. By collecting boiler operation data, the boiler operation data is preprocessed; based on the preprocessed boiler operation data, it is calculated according to a calculation model. The coal-fired boiler enters the raw coal into the furnace with a high calorific value; the low calorific value of the raw coal is obtained through the multiple relationship between the raw coal high calorific value and the raw coal low calorific value; the calculation model is corrected as needed. The present invention can realize the soft measurement of the calorific value of the raw coal into the furnace through the monitoring of a small number of online data of the boiler, improve the real-time performance of the calorific value measurement of the raw coal into the furnace, and regularly correct the proportional coefficient in the calculation model, so that the measurement method is consistent with the The equipment status matches the operating conditions, and is always at a high level of accuracy, improving the adaptability to changes in working conditions.

Description

technical field [0001] The invention relates to the technical field of combustion and combustion equipment, measurement and testing, and in particular to an on-line soft measurement method and device for the calorific value of raw coal fed into a coal-fired boiler. Background technique [0002] During the operation of coal-fired boilers, raw coals with different calorific values ​​are often used. Due to the change of the calorific value of raw coal, the calorific value of raw coal is usually unknown or cannot be known in time and accurately. Whether it is for real-time guidance of boiler operation, monitoring of boiler operation status, or for adaptive control of coal quality, it is necessary to know the calorific value of coal in real time. [0003] The current methods for obtaining the calorific value of coal include offline assay and online soft measurement. Off-line testing means taking samples regularly, sending them to the laboratory for analysis, using laboratory met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F119/08
CPCG06F30/20G06F2119/08
Inventor 陈波岳峻峰张恩先管诗骈王亚欧陶谦蔡亮耿察民
Owner JIANGSU FRONTIER ELECTRIC TECH
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