Installation and Maintenance of High Temperature Fan by Xianrun Blower

Installation and Maintenance of High Temperature Fan by Xianrun Blower

Introduction

High temperature fan is widely used in iron and steel plant, metallurgy industry, chemical industry, electric power plant and other industries, and compared with normal centrifugal fan, high temperature fan has higher failure rate, and shorter service life. So, the installation and maintenance technical requirements is relatively higher, as well as more difficult.

High Temperature Fan for Cement Rotary Kilns

1.1 Centrifugal Fan Main shaft Installation 

Thermal expansion of the high temperature fan main shaft is achieved by the positioning end bearing axial direction moving. The main shaft thermal expansion under high temperature working condition has been considered during the designation, generally, the installation location dimension of bearing house and centrifugal fan impeller will be marked clearly in the drawing. 

High Temperature Fan for Cement Rotary Kilns

During on-site installation, the below two points needs attention: 

(1) according to the main shaft expansion direction, select the load end as positioning end;

(2) according to the cover difference to confirm locating bearing and non - locating bearings.

Centrifugal Fan Selection Matters Need Attention by Xianrun Blower---Part 2

Centrifugal Fan Selection Matters Need Attention by Xianrun Blower

5. In the centrifugal fan selection, the most important is long-term economic operation quality and efficiency, other than one-time investment. 

6. In the centrifugal fan selection, be seriously compared with each other, give preference to higher efficiency, samller size, lighter weight, larger adjusting range one. 

High Quality ID Fan for Ventilation

7. For the frequency conversion centrifugal fan, please note that the system calculated total pressure losses are rated pressure, and centrifugal fan power needs to append 15%~20% on calculated value. 

8. Pay attention to the matching relation of pipe system resistant characteristics and centrifugal fan characteristics. For stable operation, centrifugal fan needs to work around the highest efficiency point, and the working point is right of the pressure peak point in the performance curve (in larger airflow side, in general, the working pressure is 80% of pressure peak point). 

Centrifugal fan design point efficiency should not be less than 90% of the highest efficiency. 

High Temperature Fan for Cement Rotary Kilns

9. For more than one centrifugal blowers working in parallel or in series, it is better to select the same model centrifugal fans.