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黄金科学技术 ›› 2021, Vol. 29 ›› Issue (1): 129-135.doi: 10.11872/j.issn.1005-2518.2021.01.059

• 采选技术与矿山管理 • 上一篇    

梅山铁矿通风系统多时段变频分风方法应用

许志逞1,居伟伟2,3,4()   

  1. 1.南京宝地梅山产城发展有限公司矿业分公司,江苏 南京 210012
    2.中钢集团马鞍山矿山研究总院股份有限公司,安徽 马鞍山 243000
    3.金属矿山安全与健康国家重点实验室,安徽 马鞍山 243000
    4.华唯金属矿产资源高效循环利用国家工程研究中心有限公司,安徽 马鞍山 243000
  • 收稿日期:2020-03-17 修回日期:2020-09-21 出版日期:2021-02-28 发布日期:2021-03-22
  • 通讯作者: 居伟伟 E-mail:juweiwei2004@126.com
  • 作者简介:许志逞(1985-),男,江苏南京人,工程师,从事矿井通风除尘技术相关工作。406598050 @qq.com
  • 基金资助:
    “十三五”国家重点研发计划项目“金属非金属矿山采运过程物理化学除尘技术与装备”(2017YFC0805204);安徽省科技重大专项项目“工业企业低浓度VOC废气净化设备与技术研究”(17030801034)

Application of Multi-period Variable Frequency Air Distribution Method in Ventilation System of Meishan Iron Mine

Zhicheng XU1,Weiwei JU2,3,4()   

  1. 1.Nanjing Baodi Meishan Production City Development Co. ,Ltd. ,Mining Branch,Nanjing 210012,Jiangsu,China
    2.Sinosteel Ma’anshan Institute of Mining Research Co. ,Ltd. ,Ma’anshan 243000,Anhui,China
    3.State Key Laboratory of Safety and Health for Metal Mine,Ma’anshan 243000,Anhui,China
    4.Huawei National Engineering Research Center Co. ,Ltd. ,of High Efficiency Cyclic Utilization of Metal Mineral Resources,Ma’anshan 243000,Anhui,China
  • Received:2020-03-17 Revised:2020-09-21 Online:2021-02-28 Published:2021-03-22
  • Contact: Weiwei JU E-mail:juweiwei2004@126.com

摘要:

梅山铁矿通风系统15 台主通风机总装机容量为2 730 kW,全天满负荷运行实耗功率为1 940.76 kW,每年通风成本高达1 445.09万元,通风风量及能耗浪费严重。从矿井风量的“供需平衡”理论出发,根据电机学和流体力学理论中频率、转速和风量之间的关系式,精确计算出满足3个时段矿井需风量时各主通风机的实际运行频率,然后通过远程控制系统对各主通风机进行精确调频,按需通风。系统运行正常后实际风量能够满足3个时段所需风量的要求,各时段实耗功率分别为1 093.28 kW、1 385.06 kW和1 786.38 kW,15台主通风机每年可节省通风成本386.59万元,解决了主通风机满负荷运行造成的风量和能耗浪费等问题。

关键词: 多时段, 多风机, 通风系统, 按需通风, 精确变频, 实耗功率, 通风节能

Abstract:

Meishan iron mine adopts the ventilation system of four-stage progressive return fan station,with many main fans and wide distribution.In order to strengthen the management of ventilation system,the remote control system of multi-stage fan station of the mine was gradually established in 2006.Main fans are equipped with frequency converter,total installed capacity of 15 main fans is 2 730 kW,actual power consumption of full-time operation is 1 940.76 kW,and the annual ventilation cost is up to 14.4509 million Yuan.If the ventilation of working faces with constant air volume according to the maximum demand,it shall be inevitably result in the waste of air volume and energy consumption.At present,changing the characteristic curves of the main fans to adjust the air volume can be achieved by adjusting the installation angle of the blade or the frequency conversion of 1 Hz amplitude,but this method is time-consuming,laborious and difficult,and the method of precise frequency modulation to adjust the air volume is relatively weak.Therefore,based on the theory of “balance of supply and demand”,ventilation period is divided into three,according to the number of mining face,driving working face,other working faces and chambers,and given a certain air leakage coefficient to determine the actual air volume in three periods for ventilation on demand,which can maximize the effect of ventilation and energy saving.According to the relationship between frequency,rotation speed and air volume in the theory of electromotor and fluid mechanics,the actual operating frequency of each main fan meeting the mine air demand in three periods was calculated accurately.Each main fan is precisely and remotely frequency modulated by PLC remote control system,which simplifies the complicated regulation mode of ventilation management personnel adjusting air volume by frequency 1 Hz.After normal operation,the actual air volume in three periods can meet the requirements,and the actual power consumption in each period is 1 093.28 kW,1 385.06 kW and 1 786.38 kW.Through the implementation of research plan of multi time precise frequency conversion and energy saving ventilation technology,the ventilation cost of mine ventilation system is saved by 3.865 million Yuan per year,which solves the problems of air volume,energy consumption and waste caused by full ventilation of the mine ventilation system.The effect is remarkable,which embodies the advanced nature of modern mine ventilation and energy saving technology,and fully displays the advantages of multi-stage time station frequency conversion ventilation “intelligent” energy saving.

Key words: multi-period, multi-fan, ventilation system, ventilation on demand, precise frequency conversion, actual power consumption, ventilation and energy saving

中图分类号: 

  • TD724

表1

通风系统机站风机参数"

安装位置风机型号数量/台额定功率/kW叶片角度/(°)风量范围/(m3·s-1风压范围/Pa
-318 m水平东南井回风机站K45-6-№1942004059.8~113.2920~1 766
-330 m水平西风井回风机站K45-6-№1942004059.8~113.2920~1 766
-402 m水平北风井进风机站K45-6-№1942004059.8~113.2920~1 766
-402 m水平南风井进风机站K40-6-№1931104039.5~86.0277~1 280

图1

梅山铁矿通风系统现状示意图"

表2

通风系统现状检测结果"

编号进风井进风量/(m3·s-1回风井回风量/(m3·s-1
合计566.04575.70
1南风井157.44主斜坡道38.40
2西南井60.17东南井293.47
3北风井267.56西风井282.23
4副井17.72
5主井1#、2#24.75

表3

三时段矿井实际需风量计算结果"

序号类型早班需风量/(m3·s-1中班需风量/(m3·s-1晚班需风量/(m3·s-1
合计430.78460.89539.53
1回采工作面需风量198.80227.20262.70
2掘进工作面需风量68.9062.0182.68
3硐室需风量40.0040.0040.00
4漏风系数1.41.41.4

图2

不同转速下主通风机的特性曲线注:R为风阻特性曲线;Ⅰ、Ⅱ、Ⅲ分别为不同转速下的风机特性曲线;N0、N1和N2分别为风阻特性曲线和各风机特性曲线相交的工况点;P0、P1、P2分别为对应N0、N1和N2工况点的风机风压;Q0、Q1和Q2分别为对应N0、N1和N2工况点的风机风量"

表4

三时段主通风机运行频率计算结果"

序号时段所需风量/(m3·s-1计算频率/Hz运行频率/Hz
1早班430.7837.4138
2中班460.8940.0341
3晚班539.5346.8647

表5

通风系统三时段应用效果检测数据"

序号时段运行频率 /Hz所需风量 /(m3·s-1实际风量 /( m3·s-1实耗功率 /kW
1早班38430.78436.571 093.28
2中班41460.89470.121 385.06
3晚班47529.89542.581 786.38
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