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

A main exhaust fan and air volume control technology, applied in the field of sintering technology, can solve problems such as inability to ensure sintering quality, high power consumption and loss, and deviation of the sintering end from a fixed position, etc., so as to save money, save power, and reduce energy consumption. consumption effect

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

However, when the speed of the trolley changes, the sintering end point will deviate from the fixed position, and the sintering quality cannot be guaranteed
[0005] In order to adapt to the impact of trolley speed changes on 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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Embodiment 1

[0040] 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.

[0041] Such as figure 2 As shown, the method includes:

[0042] S201: Measure the trolley speed of the sintering trolley.

[0043] When measuring the trolley speed of the sintering trolley, the running speed of the trolley set in the trolley control device can be obtained as the trolley speed. However, in actual operation, due to reasons such as wear or mechanical failure, the actual running speed of the trolley may be inconsistent with the set running speed, which will affect the adjustment of the air volume of the main exhaust fan. Therefore, in this embodiment, on the trolley Install a speed sampling instrument to directly detect the actual running speed of the trolley as the speed of the trolley to avoid affecting the adjustment of the main exhaust air volume due to the inconsistency between the actual running s...

Embodiment 2

[0092] 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.

[0093] according to image 3 As shown, steps S301-S303 are equivalent to steps S201-S203 in Embodiment 1. For detailed descriptions of steps S301-S303, please refer to the description of steps S201-S203 in Embodiment 1 above, which will not be repeated here.

[0094] S304: Detect the smoke components in the unit volume of smoke in the large flue according to the preset time interval.

[0095] 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 trolley spe...

Embodiment 3

[0114] This example refers to Figure 4 process shown. according to Figure 4 As shown, steps S401-S406 are equivalent to steps S201-S206 in Embodiment 1. For detailed descriptions of steps S401-S406, please refer to the description of steps S201-S206 in Embodiment 1 above, which will not be repeated here.

[0115] S407: Calculate the difference between the target air volume of the large flue obtained from two adjacent calculations.

[0116] S408: Determine whether the difference is greater than a preset value.

[0117] When the judgment result is greater than, execute step S409; otherwise, execute step S410.

[0118] S409: Use the currently calculated target air volume of the large flue as an adjustment parameter.

[0119] S410: Use the average value of the target air volume of the large flue obtained by two adjacent calculations as an adjustment parameter.

[0120] S411: Send the adjustment parameter to the controller of the main exhaust fan.

[0121] When the target a...

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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 trolley speed of a sintering trolley, calculating the vertical sintering speed of 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 speed of the sintering trolley changes, the method can be used to regulate the air quantity of the main draft fan to be matched with the current trolley speed automatically and accurately, and thus reduce 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 孙超袁立新申伟杰卢杨权高鹏双
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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