Efficient induced draft fan matched with circulating fluidized bed

Abstract

The invention discloses an efficient induced draft fan matched with a circulating fluidized bed. The efficient induced draft fan comprises an enclosure, an impeller, a transmission set, a support and a motor, wherein the impeller comprises 12 backward-bent plate blades, a tapered arc-shaped wheel cover, a panel wheel disc and a hub; forward-bent single-plate blades are uniformly distributed in the circumferential direction, welded between the tapered arc-shaped wheel cover and the panel wheel disc and assembled with the hub; the enclosure is a volute body formed by welding of plates; an air inlet adopts a welding structure; the molded line of the air inlet is a tapered arc-shaped line which converges in the axial direction; and the outlet angle of the blades is 29.3 degrees. The efficient induced draft fan is designed into a pneumatic fan by the numerical simulation technology, main parts and important parameters, which influence the pneumatic performance of the fan, are subjected to optimal design by an intelligent computer optimization platform in combination with gained experiences, the molded lines and the inlet and outlet angles of the blades are optimized, flow channels of the blades almost have no 'jet-wake' structure, vortexes are less, the flow loss of the blades is small, and the efficient induced draft fan is high in efficiency, wide in working area, compact in structure and suitable for being matched with the circulating fluidized bed.

Description

technical field [0001] The invention relates to an induced draft fan, in particular to a high-efficiency induced draft fan matched with a circulating fluidized bed Background technique [0002] As a new boiler with high efficiency, energy saving and environmental protection, circulating fluidized bed boiler has been rapidly developed and widely used at home and abroad. Compared with conventional boilers, it has the advantages of wide fuel adaptability, environmental protection, load Good regulating performance, high combustion heat intensity, strong heat transfer capacity in the furnace, and good comprehensive utilization of ash and slag. With the rapid development of my country's economy and industry, the problem of environmental pollution is becoming more and more serious, and energy saving and emission reduction has become the theme of today's industrial field. Due to the continuous improvement of the performance, appearance, noise, installation and connection of the ind...

AI Technical Summary

Problems solved by technology

Due to the continuous improvement of the performance, appearance, noise, installation and connection of the induced draft fan supporting the circulating fluidized bed, most of the existing domestic fans are products developed in the 1960s and 1970s, and the blade structure of the impeller is straight The method of connecting with the curve, and the outlet angle of the blade is greater than 90°, so the efficiency of the ordinary fan cannot meet the higher requirements

Images