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Efficient induced draft fan matched with circulating fluidized bed

A circulating fluidized bed and induced draft fan technology, which is applied in mechanical equipment, machines/engines, liquid fuel engines, etc., can solve the problem that the efficiency of ordinary fans cannot reach a high level, and achieve compact structure, high efficiency, and low flow loss. Effect

Inactive Publication Date: 2016-08-17
ZHEJIANG SHANGFENG SPECIAL BLOWER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Efficient induced draft fan matched with circulating fluidized bed
  • Efficient induced draft fan matched with circulating fluidized bed
  • Efficient induced draft fan matched with circulating fluidized bed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0013] Embodiment: the dimensional characteristics of No. 6.3 blower fan model:

[0014] 1. The outlet diameter of blade 11 of impeller 2 is 630mm, the inlet diameter is 345mm, the width is 184mm, the outlet width is 112mm, and the outlet angle of blade 11 is 29.3°.

[0015] 2. The air inlet 6 has a diameter of 425mm and a width of 130mm.

[0016] 3. Case 1 is a volute case with a width of 287mm. The distance from the center of the case outlet to the center of the case is 566mm, and the case outlet is 385×287mm.

[0017] 4. The dimensionless performance curve and parameter characteristics: flow coefficient 0.082, pressure coefficient 0.565, fan efficiency 83%, specific A sound level 22.6dB.

[0018] Since the product series are all designed by model simulation, the dimensions of the above-mentioned parts of the impeller 2, the air inlet 6 and the casing 1 are enlarged or reduced to make a series of products, which are all within the protection.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D25/08F04D29/28F04D29/30
CPCF04D25/08F04D29/281F04D29/30
Inventor 张琦徐淑君邵准远王连福
Owner ZHEJIANG SHANGFENG SPECIAL BLOWER IND CO LTD
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