Method and system for controlling air quantity of main draft fan of sintering machine

A technology of main exhaust fan and exhaust fan, applied in the field of sintering process, can solve problems such as high power consumption and loss, and achieve the effects of saving electric energy, reducing energy consumption and saving electric energy.

Active Publication Date: 2013-04-03
ZHONGYE-CHANGTIAN INT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to adapt to the impact of changes in the thickness of the material layer and the speed of the trolley on the sintering quality, in the existing sintering process, the main exhaust fan of the sintering machine system operates at the maximum design power, which will inevitably lead to excessive power consumption and loss

Method used

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  • Method and system for controlling air quantity of main draft fan of sintering machine
  • Method and system for controlling air quantity of main draft fan of sintering machine
  • Method and system for controlling air quantity of main draft fan of sintering machine

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Effect test

Embodiment 1

[0041] figure 2 It is a flow chart of the method for controlling the air volume of the main exhaust fan provided in Embodiment 1 of the present application.

[0042] Such as figure 2 As shown, the method includes:

[0043] S201: Measure the material layer thickness of the material on the sintering trolley.

[0044] In this embodiment, the thickness of the material layer of the material can be measured by a direct detection method, or the material layer thickness of the material can be calculated by indirectly detecting the amount of material discharged by the distributing machine per unit time. Since the material layer on the sintering machine trolley usually takes 40 minutes or more from the sintering start point to the sintering end point during the sintering process, this results in that when detecting the material layer thickness, the closer to the sintering end point, the greater the time lag for starting adjustment. big. Therefore, in the embodiment, when the thick...

Embodiment 2

[0100] image 3 It is a flow chart of the method for controlling the air volume of the main exhaust fan provided in the second embodiment.

[0101] according to image 3 As shown, steps S301-S304 are equivalent to steps S201-S204 in Embodiment 1. For detailed descriptions of steps S301-S304, please refer to the description of steps S201-S204 in Embodiment 1 above, which will not be repeated here.

[0102] S305: Detect the smoke components in the unit volume of smoke in the large flue according to the preset time interval.

[0103] Here, in this embodiment, the flue gas component in the unit volume flue gas in the large flue is O in the unit volume flue gas 2 , CO, CO 2 , N 2 , NO, NO 2 content. When detecting the smoke composition of the large flue, the smoke composition of the large flue is detected according to the preset time interval, which can make the detection more adaptable to the change of the system load. For example, when the system load, such as material la...

Embodiment 3

[0122] This example refers to Figure 4 process shown. according to Figure 4 As shown, steps S401-S407 are equivalent to steps S201-S207 in Embodiment 1. For detailed descriptions of steps S401-S407, please refer to the description of steps S201-S207 in Embodiment 1 above, which will not be repeated here.

[0123] S408: Calculate the difference between the target air volume of the large flue obtained from two adjacent calculations.

[0124] S409: Determine whether the difference is greater than a preset value.

[0125] When the judgment result is greater than, execute step S410; otherwise, execute step S411.

[0126] S410: Use the currently calculated target air volume of the large flue as an adjustment parameter.

[0127] S411: The average value of the target air volume of the large flue obtained by two adjacent calculations is used as an adjustment parameter.

[0128] S412: Send the adjustment parameters to the main exhaust fan controller.

[0129] When the target air...

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Abstract

The invention discloses a method and a system for controlling the air quantity of a main draft fan of a sintering machine. The method comprises the steps of: measuring the material-layer thickness of materials on a sintering trolley and the trolley speed, calculating the vertical sintering speed of the materials, and determining the effective air quantity of each air bellow; detecting smoke components of a big flue; calculating the effective air rate of each air bellow according to the detected smoke components; calculating the target air quantity of the big flue; and sending the target air quantity of the big flue to a main draft fan controller to serve as a regulating parameter, and regulating the frequency of the main draft fan to change towards a target frequency by the main draft fan controller. When the material-layer thickness or the trolley speed changes, the method can be used to regulate the air quantity of the main draft fan to be matched with the current material-layer thickness and the trolley speed automatically and accurately, and thus realize the reduction of the energy consumption of the main draft fan in a sintering process on the premise of guaranteeing the sintering quality.

Description

technical field [0001] The present application relates to the technical field of sintering technology, in particular to a method and system for controlling the air volume of a main exhaust fan of a sintering machine. Background technique [0002] With the rapid development of modern industry, the scale of steel production is getting larger and larger, and energy consumption is also increasing. Energy conservation and environmental protection indicators have become an important factor in the steel production process. In iron and steel production, iron-containing raw material ore needs to be processed by sintering system before entering blast furnace smelting. , placed on the sintering trolley and roasted to cause a series of physical and chemical changes to form sintered ore that is easy to smelt. This process is called sintering. [0003] The sintering system mainly includes a sintering trolley, a mixer, a main exhaust fan, a ring cooler and other equipment. For the general...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B21/14
Inventor 袁立新孙超申伟杰卢杨权高鹏双
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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