康爱军


摘 要:对螺杆式和离心式空压机设备的特点进行综合比较可知,离心式空压机在较大出力时(流量≥120 m3/min)优势明显,而螺杆式空压机在较小出力时(流量≤60 m3/min)优势明显。根据项目特点,从投资和节能角度,按照两种不同压强,提出4种不同的空压机设备配置方案。进行技术经济比较后,推荐采用螺杆机方案或离心机+螺杆机的方案,供用户参考。
关键词:螺杆式空压机;离心式空压机;方案
中图分类号:TH45文献标识码:A文章编号:1003-5168(2021)29-0059-04
Selection of Equipment and Scheme about Air Compressors in
Phase Ⅱ of a Power Plant
KANG Aijun
(China Power Engineering Consulting Group Northwest Electric Power Design Institute Co., Ltd., Xi'an Shaanxi 710075)
Abstract: According to the characteristics of screw and centrifugal air compressors, this paper makes a comprehensive comparison, and puts forward that the centrifugal air compressor has obvious advantages at large output (flow≥120 m3/min), while the screw air compressor has obvious advantages at small output (flow≤60 m3/min). According to the characteristics of the project, from the perspective of investment and energy saving, four different air compressor equipment configuration schemes are proposed according to two different pressures. After technical and economic comparison, screw machine scheme or Centrifuge + screw machine scheme are recommended for users' reference.
Keywords: screw air compressor;centrifugal air compressor;scheme
某电厂二期扩建项目(2×1 000 MW发电机组)工程系扩建性质,现有装机容量为2×600 MW机组,二期工程建设规模为2×1 000 MW高效超临界间接空冷机组。
电厂一期工程#1、#2炉设有8台螺杆式空压机。其中,除灰专业共设4台输灰空压机并配有4台冷冻式干燥装置,3台运行,1台备用。每台空压机流量[Q]=57.1 m3/min,压强[P]=0.8 MPa,电机功率[N]=300 kW。热机专业设4台仪表控制用空压机并配有4台微热再生式干燥装置,每台空压机流量[Q]=44.6 m3/min,压强[P]=0.8 MPa,电机功率[N]=262 kW,2台运行,2台备用(其中1台为电厂在运行后增设)。8台空压机出口通过大母管相连,4台输灰用空压机母管与4台仪表控制用空压机母管间设置一个隔离阀和一个止回阀。正常情况下,隔离阀关闭。当仪表用气不够或空压机事故状态时,可打开隔离阀,使输灰空压机作其备用。止回阀可以防止因输灰引起仪表控制用压缩空气的压强波动。
二期工程目前處于初步设计阶段。经初步估算,二期工程每台炉仪用及厂用气流量约为60 m3/min,每台炉除灰系统用气流量为120~150 m3/min。
1 空气压缩机设备选择……p>