XIE Zhiyu¹ ，LIN Tao¹ ，YANG Guanghui¹ ，WANG Yunduan¹ ，LIN Xiaojia² ，CHEN Hanyan¹ ，LIN Longyuan¹

1. School of Environment and Resources， Southwest University of Science and Technology， Mianyang 621000， China；

2. Guangyuan China Nuclear Vocational and Technical College， Guangyuan 628003， China

Abstract：

Objective In order to enhance the dust removal performance of the horizontal triangular filter cartridge dust collector， this study investigates the influence of pulse jet blowing generated by various nozzle configurations within the induction drafting apparatus on the pressure distribution across the interior surface of the horizontal triangular filter cartridge. This approach facilitates the identification of the key rules governing the effectiveness of different nozzle designs in dust removal.

Methods Different induction draft devices equipped with four types of nozzles—straight pipe nozzle， Venturi tube nozzle， scattering nozzle， and a new curved surface induction ejector—were employed to conduct cold-state pulse jet tests on horizontal triangular filter cartridge. During these tests， peak sidewall pressures at various measurement points were recorded. The relative standard deviation of these pressures was then calculated and analyzed. The two parameters were used to characterize the intensity and uniformity of the cleaning pressure， serving as technical indicators of cleaning performance. The effects of different experimental parameters on the pressure distribution on the inner walls of the filter cartridges induced by the pulse jet streams，were also investigated.

Results and Discussion With the straight pipe nozzle， when the spray pressure was 0.3，0.4， or 0.5 MPa and the spraying distance ranged from 150 to 400 mm， the average sidewall pressure peaks at measuring points P₁ and P₂ on the left side of the filter cylinder were all below the effective cleaning pressure threshold. The average relative standard deviation of 0. 76 indicated poor performance in both cleaning strength and uniformity. When Venturi tube nozzle was used at spray pressures of 0.3，0.4 or 0.5 MPa while the spraying distance was ≥300 mm， the average sidewall pressure peaks at all measuring points met the effective cleaning pressure threshold， with an average relative standard deviation of 0. 58， indicating poorer cleaning uniformity. This configuration is suitable for applications where high cleaning strength is prioritized over uniformity. Using scattering nozzles at the same spray pressures while a spraying distance ranged from 25 to 175 mm， the average sidewall pressure peaks at all measuring points exceeded slightly the effective cleaning pressure threshold， with an average relative standard deviation of 0. 09， indicating superior cleaning uniformity among all the configurations. It is suitable for applications requiring both high cleaning strength and uniformity. Finally， with the new curved surface nozzle at spray pressures of 0.3，0.4，or 0.5 MPa and spraying distances ranging from 150 to 400 mm， all measuring points showed average sidewall pressure peaks above the effective cleaning pressure threshold. The front and middle sections of the filter cylinder achieved an average sidewall pressure peak of 1 533 Pa，which was 61% higher than that of the angled spray nozzles. The average relative standard deviation of 0. 16 was lower compared to the parabolic nozzle， thus striking a balance between cleaning strength and uniformity， making itsuitable for diverse industrial applications.

Conclusion The experimental results suggest that， excluding the straight pipe nozzle， the other three types of nozzles are suited for specific industrial production settings. Upon evaluating all nozzle configurations for their induction drafting capabilities， it is observed that the horizontal triangular filter cartridge， when paired with a new curved surface induction injector， markedly elevates the pressure intensity and uniformity of the clearance operation. This configuration adeptly addresses the dual requirements for robust pressure strength and uniform clearance effectiveness， emerging as the most exceptional among the four tested nozzle types in induction drafting systems.

Keywords：horizontal triangular filter cartridge； pulse injection； dust cleaning performance； spray hole