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Method and system for air volume control of sintering machine based on sound source characteristics

A control method and technology for a sintering machine, which are applied to furnace control devices, furnaces, furnace types, etc., can solve the problems of increasing the air volume of the sintering main exhaust fan, excessive combustion of sinter, and waste of energy of the main exhaust fan, and reduce redundancy. The effect of air volume, reducing production energy consumption and improving sinter quality

Active Publication Date: 2019-12-27
HUATIAN NANJING ENG & TECH CORP MCC +1
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current solution for sintering production is to increase the air volume of the sintering main exhaust fan and use redundant air volume to overcome this problem, but this causes a waste of energy for the main exhaust fan, and it is easy to cause excessive combustion of sinter

Method used

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  • Method and system for air volume control of sintering machine based on sound source characteristics
  • Method and system for air volume control of sintering machine based on sound source characteristics
  • Method and system for air volume control of sintering machine based on sound source characteristics

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Embodiment 1

[0035] combine figure 1 , this embodiment provides a sintering machine air volume control method based on sound source characteristics,

[0036] The workshop where the sintering machine is located is provided with several sound signal collectors, and the outlet of the main exhaust fan is provided with an air volume detector. The method includes the following steps:

[0037] Step 1: Collect the sound data of the sintering workshop under normal working conditions and fault conditions respectively; reconstruct the source of the sound data of the sintering workshop to obtain the reconstruction sample set of the normal working source and the source reconstruction sample set of the air leakage fault; use Obtain the reconstruction sample set of the normal working signal source and the reconstruction sample set of the air leakage fault signal source to construct the evaluation model of the air leakage rate of the sintering machine based on the characteristics of the sound source;

[...

Embodiment 2

[0042] combine figure 2 As the specific scheme of embodiment 1, the specific method of constructing the air leakage rate evaluation model of the sintering machine based on the characteristics of the sound source in the above step 1 is as follows:

[0043] Step 1.1: Process the collected sound data of the sintering workshop to obtain the normal data set X normal and air leakage fault data set X fault ;

[0044] Step 1.2: The normal data set X normal and air leakage fault data set X fault Mix and perform independent component analysis to obtain the source reconstruction model of the sound signal in the sintering machine production workshop; the specific method is: Step 1.2.1: For the mixed normal data set X normal and air leakage fault data set X fault The data in is zero-meanized and whitened, and the sample Z after whitening is obtained;

[0045] Step 1.2.2: According to the estimation of the number of live sound signal sources, the initialization vector W={w 1 ,w 2 ,...

Embodiment 3

[0054] combine image 3 , as the specific scheme of embodiment 1, the method for obtaining the air leakage rate index of the sintering machine based on the characteristics of the sound source in the above step 2 includes:

[0055] Step 2.1: Sampling and denoising the collected sound data of the sintering workshop to obtain online sound samples;

[0056] Step 2.2: Analyze the sound source of the online samples, and obtain the sound intensity set S corresponding to the online fault characteristic sound source j , S j ={s j1 ,...,s jk}, where j is the serial number of the current sample, i is the serial number of the characteristic sound source, s ji is the sound intensity corresponding to the i-th feature of the current sample;

[0057] Step 2.3: Calculate the online samples at the characteristic frequency f i Air leakage fault contribution index at Accumulate the air leakage fault contribution indicators corresponding to each characteristic frequency to obtain the sinte...

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Abstract

The invention discloses a sintering machine air volume control method and system based on sound source characteristics. A sintering workshop is provided with a sound signal collector, and an air volume detector is arranged at the outlet of a main exhaust fan; the method comprises the following steps that the sound data of the sintering workshop under various working conditions are collected, source reconstruction is carried out on the sound data of the sintering workshop to obtain a source reconstitution sample set, and a sintering machine air leakage rate evaluation model is constructed by utilizing the obtained source reconstitution sample set; 2, the sound data of the sintering workshop are collected in real time, and the air leakage rate index of the sintering machine is calculated online according to the air leakage rate evaluation model; 3, the outlet air volume of the main exhaust fan is collected in real time, the outlet error air volume of the fan is calculated according to the detected outlet air volume and the theoretical air volume of the sintering machine, the air leakage air volume compensation value of the sintering machine is calculated according to the air leakagerate index of the sintering machine, the error air volume of the sintering machine is calculated according to the air leakage air volume compensation value and the outlet error air volume, and the motor frequency of the main exhaust fan is adjusted according to the error air volume of the sintering machine.

Description

technical field [0001] The invention relates to a method and system for controlling air volume of a sintering machine based on sound source characteristics. Background technique [0002] Iron ore sintering is an important link in the modern iron and steel metallurgical process. Its main production link is to ignite and burn evenly mixed small granular raw materials on a trolley-type sintering machine to fuse them into massive sinter. In order to ensure the strength and chemical composition of sinter agglomerates, the raw materials need to be fully burned on the sintering machine. The uniformly mixed small granular raw materials are evenly distributed in the form of a thick material layer on the sintering machine. In order to ensure the full combustion of the raw materials, the sintering machine is equipped with a bellows under the raw material layer and connected to the sintering main exhaust fan. The negative pressure generated by the main exhaust fan Press down to bring f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27B21/14F27D19/00
CPCF27B21/00F27D19/00F27D2019/0078F27D2019/0096F27M2003/04
Inventor 方田叶学农
Owner HUATIAN NANJING ENG & TECH CORP MCC
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