- Chongqing General Industry Group is a large state-owned enterprise that produces industrial fans and other machinery. It has decades of experience designing fans for the steel and cement industries. - Currently, many fans in China operate at low efficiency due to design mismatches with actual operating conditions and oversizing of fans. CQGI has expertise in analyzing fan and piping systems and optimizing fans through techniques like CFD analysis to improve efficiency. - Examples are provided of CQGI improving fan efficiency by 18% in a sintering plant fan and 75% in a cement mill fan through rotor replacements informed by their technical analysis, saving hundreds of thousands of dollars annually in energy costs.

2. ■ 目录 Catalogue
Introduction
Strategy
3
4
1
2
目前国内风机运行效率低下的现状及原因分析
Current situation of low efficiency in fan operation and analysis
“重通”风机在节能改造上的实例
Examples in energy saving and reconstruction by CQGI fan
“重通”拥有原创研发、创新及系统分析能力
Original research, innovation and systematic analysis of CQGI
风机系统高效节能改造首选“重通”
CQGI leading high efficiency, energy saving&retrofit of fan system
“重通”高效离心通风机向世界先进水平迈进
CQGI high efficient centrifugal fan approaching advanced tech level
5

3. ■ 重通集团简介Brief Introduction of CQGI
重庆通用工业（集团）有限责任公司为大型国有企业，主要研究生产大型工业透平机械，主要产品有工业通风机、鼓风
机、压缩机、离心制冷机和风力发电叶片。重通公司设计生产的离心通风机致力于钢铁行业、水泥行业近三十年，见证了
宝钢风机国产化的进程和新型干法水泥的发展。宝钢风机第一台国产化从重通开始，第一条2000吨/日、5000吨/日新型干
法水泥的窑尾高温风机都是由重通公司提供。“重通”离心通风机在钢铁、水泥行业起到风机行业的带头军作用。
Chongqing General Industry (Group) CO., LTD is a large state-owned enterprise, mainly specializing in large industrial
turbine machinery. The main products are industrial fan, blower, compressor, centrifugal chiller and wind vane. Centrifugal
fan is designed and manufactured by CQGI used in the iron and steel industry, cement industry nearly thirty years,
witnessing the BAO Steel Fan localization process and the development of new dry process cement. BAO Steel fan first
localization began from CQGI, the first NSP cement preheater high temperature fan with production ability 2000 tons/day,
5000 tons/day is provided by CQGI company. “CQGI" centrifugal fan in the steel, cement industry plays a leading role in
industry of fan.

4. 由于前些年国家对于基础建设投资较大，房地产火爆，钢铁、水泥行情好，各钢铁、水泥生产厂家超产欲望
强烈，致使设计参数与运行参数偏差较大，再加上设计配风时又留有15%-20%的富余量。这就造成风机设计
工况点在80%以上的高效点，而实际运行的工况点与设计工况点偏移，致使实际在低效率点上运行，有的低
到了40%的效率点上运行。
Due to large investment in infrastructure, real estate, steel and cement industry recent year, the iron and
steel, cement manufacturers desire strongly and cause that the design parameters and operation
parameters deviation is bigger, and the worse that the air distribution with 15% - 20% of the amount of
surplus when design. This makes the fan design point is in more than 80% efficient point, and the actual
running condition and design conditions of deviation causes the actual running at low efficiency point, even
to 40% efficiency point.
目前国内风机运行效率低下的现状及原因分析
Current situation of low efficiency in fan operation and analysis

5. 风机结合现场管道的匹配情况不是最优，缺乏风机与系统合理衔接的研究。
风机设计效率不高，没有达到世界最先进水平。
风机产品恶性竞争，价格低廉不能生产高端产品。
Combination between fan and piping doesn’t match perfect, lack of researching linking to fan and the system.
Design efficiency is not high, not reached the world's most advanced level. Vicious competition, fan at low
price can't produce high-end products.
目前国内风机运行效率低下的现状及原因分析
Current situation of low efficiency in fan operation and analysis

6. 双吸风机叶轮单面磨损的管道两向流分析
“重通”拥有原创研发、创新及系统分析能力
Original research, innovation and systematic analysis of CQGI
Pipe two side flow analysis of single side abrasion of double suction fan impeller

7. “重通”拥有原创研发、创新及系统分析能力
Original research, innovation and systematic analysis of CQGI

8. 蓖冷机一室风管分析
“重通”拥有原创研发、创新及系统分析能力
Original research, innovation and systematic analysis of CQGI
Duct analysis of grate cooler

9. “重通”拥有原创研发、创新及系统分析能力
Original research, innovation and systematic analysis of CQGI

10. 钢厂助燃通风系统管阻分析
“重通”拥有原创研发、创新及系统分析能力
Original research, innovation and systematic analysis of CQGI
Pipe resistance analysis of steel plants’ combustion and ventilation system

11. “重通”拥有原创研发、创新及系统分析能力
Original research, innovation and systematic analysis of CQGI

12. 水泥磨循环风机SL4-73№21F
“重通”风机在节能改造上的实例
Examples in energy saving and reconstruction by CQGI fan
案例1、陕西冀东海德宝扶风公司更换转子提高效率的案例分析介绍
Case 1, Project analysis and introduction of replacing the rotor efficiency of Heidelberg Shaanxi Jidong Fufeng
company
原 来 original
改造后要求
after optimization design
设计工况
design
condition
运行工况1
operating
condition1
运行工况2
operating condition2
设计工况
design condition
运行工况1
operating condition1
当地大气压
Local atmospheric pressure Pa
99564 99564 91000 91517
进口温度
inlet temperature (℃)
70 106 108 106 102
进口密度
inlet density
标态
standard state(kg/ m3)
0 3.11 1.53 2 1.524
进口风量
inlet flow
实际
actual(m3/s)
61.1 25.2 42.51 64 49.98
进口压力
inlet pressure
静压
static pressure（Pa）
-3800 -2842 -2936 -4000 -3122
压升
pressure-rise
静压
static pressure（Pa）
3250 2303 2646 3700 3172
出口压力
out let pressure
静压
static pressure（Pa）
-550 -539 -290 -300 -150
粉尘含量 dust loading g／m3
200
粉尘性质 dust characteristics Cement powder
Cement mill circulating fans SL4-73№21F

13. 水泥磨循环风机SL4-73№21F
案例1、陕西冀东海德宝扶风公司更换转子提高效率的案例分析介绍
Case 1, Project analysis and introduction of replacing the rotor efficiency of Heidelberg Shaanxi Jidong Fufeng company
“重通”风机在节能改造上的实例
Examples in energy saving and reconstruction by CQGI fan
该风机原运行电流44A~46A左右，按拉法基标准测试风机运行效率38%~43%，我们采用最节省时间和成
本的方式，对叶轮进行改造设计，更换转子组的方案。更换后按拉法基标准测试风机风机运行效率75%，运行
电流26A~28A。该风机配套电机400KW 6KV，节约有功功率约120kw/h。
The original operating current of the fan is 44A ~ 46A or so, according to Lafarge Standard test fan operation
efficiency of 38% to 43%, we apply the most time and cost-saving way to transform the design of the impeller.
After replacing, The Fan operating efficiency is 75% according to the standard tests by Lafarge Fan, and the
operating current is 26A ~ 28A. The fans match with motor 400KW 6KV, save active power about 120kw / h.
一年价值计算为：120×24×300×0.7=60.5万元/USD96,031.00.
Calculated as the value of one year:120×24×300×0.7=60.5万元/USD96,031.00.
Cement mill circulating fans SL4-73№21F

14. 项 目 item 单 位 unit 数 值
介质 medium /
烧结烟气
Sintering Gas
进口介质密度
inlet density
kg/m3 0.848
进口容积流量
inlet flow
m3/min 10000
进口压力
inlet pressure
kPa(A) 82
进口温度
inlet temperature
℃ 150
出口压力
outlet pressure
kPa(A) 98.5
静压升static
pressure rise
kPa 16.5
主轴转速
speed of mainshaft
r/min 1500
“重通”风机在节能改造上的实例
Examples in energy saving and reconstruction by CQGI fan
案例2、由我公司总工（博士）开发的烧结SJ9000风机CFD优化风机叶轮改造
Case 2, sintering SJ9000 fan impeller fan CFD optimization transformation developed by our Chief Engineer (Dr.)
rotating direction Circumferentially
spaced 22 vanes
改 造 前
before optimized design

15. SJ9000风机转子组实物
“重通”风机在节能改造上的实例
Examples in energy saving and reconstruction by CQGI fan
案例2、某钢铁有限公司烧结SJ9000风机CFD优化风机叶轮改造
Case 2, Fan Impeller CFD optimization of a sintering SJ9000 Steel Co., Ltd. Fan
Rotor assembly of SJ9000
SJ9000风机叶轮改造后效率曲线
SJ9000 fan impeller efficiency curve after optimizing
transform

16. 在SJ9000烧结鼓风机（主抽）设计点与运行点几乎没有偏差，原电机3500KW、6KV，不换电机实施改
造后，为了能够更直观的反映节能效果，把转子安装在烧结系统与未进行改造前相同机组的生产线进行对比测试，
风机本身的效率提高18%，节约有功功率630kw/h，一年节约约315万元。
钢厂的所有大型风机、水泥生产线上五大风机的改造，如果采用CFD优化风机叶轮，再结合偏工况点的现状，
一起改造效果将会更加明显。
Sintering blower (spindle) in SJ9000, the design point and the operating point is almost no deviation,
the original motor 3500KW, 6KV, after no change in motor implementation of the transformation, in
order to reflect the energy-saving effect more directly , the rotor is mounted before sintering system and
not to transform the same unit production line comparison test, the efficiency of the fan itself increased
by 18%, saving active power 630kw / h, a year to save about 315 million.
All transformation of large fan and five fan on the cement production line, if the fan impeller is by CFD
optimization, combined with the status quo bias operating point, the effect of reconstruction will be
more obvious.
“重通”风机在节能改造上的实例
Examples in energy saving and reconstruction by CQGI fan

17. 重庆通用工业（集团）有限责任公司
Chongqing General industry (group) coLtd
拥有老、中、青的技术人才队伍，能将鼓风机、压缩机的先进技术运用到通风机；
technical personnel of different ages apply advanced technology to fan.
拥有西安交大博士带领的掌握CFD流体分析前沿技术的科技人才；
have the technology talents led by Dr of xi 'an jiaotong university ,they masters CFD fluid analyzes cutting-edge
technology .
拥有从事钢铁、水泥生产线风机设计研究的人才梯队；
have personal engaged in steel, cement production line fan design research
拥有ISO9001、国军标认证体系和核电认证体系三结合的质保体系；
combined ISO9001,Military standard certification system and nuclear quality assurance system .
风机系统高效节能改造首选“重通”
CQGI leading high efficiency, energy saving&retrofit of fan system

18. 风机系统高效节能改造首选“重通”
CQGI leading high efficiency, energy saving&retrofit of fan system

19. “重通”高效离心通风机向世界先进水平迈进
CQGI high efficient centrifugal fan approaching advanced tech level
安徽铜陵上峰高效节能风机厂内组装
Anhui tongling shangfeng” high efficiency and energy-saving fan is assembled in factory

20. “重通”高效离心通风机向世界先进水平迈进
CQGI high efficient centrifugal fan approaching advanced tech level
安徽铜陵上峰改造前运行情况
running status before reconstrcution foranhui tongling shangfeng

21. “重通”高效离心通风机向世界先进水平迈进
CQGI high efficient centrifugal fan approaching advanced tech level
安徽铜陵上峰改造前尾排风机运行电流
running current of end exhaust fan for anhui tonglign shangfeng before reconstruction

22. “重通”高效离心通风机向世界先进水平迈进
CQGI high efficient centrifugal fan approaching advanced tech level
安徽铜陵上峰尾排风机改造后情况
running status of end exhaust for anhui tongling shangfeng after reconstruction

23. 安徽铜陵上峰尾排风机改造后电流
current of end exhaust fan for anhui tonglin shangfen after reconstruction
“重通”高效离心通风机向世界先进水平迈进
CQGI high efficient centrifugal fan approaching advanced tech level

24. 谢谢！THANKS！
Factory Add.： No.18 Jidian Road, Nan'an District, Chongqing.
Zip Code：401336
Tel： 023-67661176 Fax： 023-67659553
E-mail：ct-fx@163.com
International Marketing Department
Ray Xie Project & Sales Manager (Metallurgy, Cement)
Tel：+86 13968260629 Fax：+86 23 88515928
Email：shawn.liu@cqgie.com, cqgigroup@gmail.com