HUANG Yao, ZHAO Yunfei, QIN Jingyuan, YIN Xixi, FAN Junzhe, LIN Longyuan

(School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, China)

Abstract

Objective Pulse-blowing cartridge dust collectors are widely used for their exceptional dust removal efficiency. However, the existing blowpipe design adopts the same blowing aperture, which makes the cartridge cleaning effect poor, negatively affecting the overall cleaning effect of the cartridge dust collector and the cartridge’s service life. In order to achieve the uniformity through the airflow of the blowpipe and achieve consistently effect of uniform dust cleaning across the cartridge dust collector, optimizing the blowing orifice diameter of the blowpipe is essential.

Methods Firstly, the peak pressure on the sidewalls of each part of the filter cartridge was measured and a self-made pulseblowing gas flow measurement device was used to measure the porous blowing gas flow of the existing cartridge dust collector to analyze the inhomogeneity of the soot cleaning effect. Secondly, the effect of the blowing aperture on the blowing air flow rate and sidewall pressure peak value of the cartridge was investigated to optimize the blowing aperture. Finally, the optimization effect was evaluated by taking the sidewall pressure peak value of each part of the cartridge as an index.

Results and Discussion Before optimization, all four blowholes possess diameters of 19 mm, with air flow rates of 13. 69, 14. 78,16. 03 and 16. 93 L, resulting in a standard deviation of 1. 41, indicating the air flow rate uniformity. The peak sidewall pressures at the upper measurement points of the four canisters are 369, 713, 971 and 1 000 Pa, respectively. At the middle,pressrues are 699, 1 472, 1 601 and 2 627 Pa, which are 694, 1 612, 2 357 and 3 416 Pa at the lower points. The maximum difference in sidewall pressure (between the maximum and minimum values) at the upper, middle and lower parts of the cartridges is 631, 1 928 and 2 722 Pa, respectively. The minimum value of the peak sidewall pressure at the upper, middle and lower parts of the four cartridges is 37%, 26% and 20% of the maximum value. After optimization, the blowholes diameters are adjusted to 23, 20, 18 and 17 mm, with air flow rates of 14. 05, 15. 08, 15. 87 and 16. 13 L, resuiling in a reduced standard deviation of 0. 93, indicating the improved air flow rates uniformity. The peak sidewall pressures at the upper measurement points of the four canisters are 500, 850, 898 and 767 Pa, respectively. At the middle points, pressures are 1 350,1 517, 1 708 and 2 400 Pa, and they are 1 601, 2 033, 2 323, 3 027 Pa at the lower measurement points. The maximum difference in sidewall pressure at the upper, middle and lower parts of the cartridges is 398, 1 050 and 1 426 Pa, respectively. The minimum value of the peak sidewall pressure at the upper, middle and lower parts of the four cartridges is 56%, 56% and 53% of the maximum value.

Compared with before optimization, the homogeneity increases by 1. 5, 2. 2 and 2. 7 times, respectively.

Conclusion The non-uniformity of the air-flow rate of different blow holes on the same blow pipe was verified by the pulse-blowing airflow measuring device. The uniformity of the airflow rate was improved after optimizing the diameter of the blow holes. The range of variation of the peak pressure on the sidewall was reduced, and the uniformity of the cartridge ash cleaning was significantly improved.

Keywords: filter cartridge dust collector; blowing hole; aperture; air flow rate; peak of sidewall pressure

Get Citation:HUANG Y, ZHAO Y F, QIN J Y, et al. Optimization of blowing hole aperture of cartridge dust collector[ J]. China Powder Science and Technology, 2024, 30(2): 60-66.

Received: 2023-08-12,Revised:2023-12-04,Online:2024-01-12。

Corresponding Author:林龙沅(1981—),男,教授,博士,硕士生导师,研究方向为气流粉碎、分级与除尘净化。 E-mail: Lly7572@126.com。

DOI:10.13732 / j.issn.1008-5548.2024.02.005

CLC No: X964; TB4                  Type Code:A