**Abstract:** Based on the principles of porous jet diffusion and jet superposition, a dual-layer laminated structure has been developed to create a wear-resistant throttle air volume control valve. This innovative design is capable of replacing traditional throttling pipes and air volume control valves commonly used in dust removal systems. It effectively balances network resistance, offers superior wear resistance, ensures a long service life, allows for flexible installation positions, and provides easy adjustment. The proposed valve addresses key limitations of existing solutions, such as fixed opening rates and high-speed airflow-induced wear. **Keywords:** Air flow control valve; Throttle jet; Dust removal system; Throttle problems and analysis **1. Dust Removal System: Throttle Problems and Analysis** To balance the resistance within a dust removal pipe network and regulate airflow, throttle systems and air volume control valves are widely implemented. Typically installed in shorter branch pipes, these devices have a relatively high resistance coefficient. A standard throttle pipe, as illustrated in Figure 1, features a fixed opening rate that cannot be adjusted. If the opening ratio (φ) is defined as the ratio of the core pipe area (A) to the outer pipe area (A0), then the wind speed at the outlet of the core pipe can be calculated using the formula: v = v₀ × (1 / φ). With φ ranging between 0.2 and 0.5, the outlet wind speed can reach 2 to 5 times the inlet speed. For instance, if the pipeline velocity is 16 m/s, the outlet speed could rise to as high as 80 m/s. This high-speed airflow can cause severe wear, especially when the throttle is placed near elbows or tees, where the distance is less than 5–10 times the pipe diameter. Since wear increases with the cube of the velocity, this leads to rapid degradation of the piping and components. Field observations at WISCO’s sintering plant show that throttles located near 6 mm elbows and tees often become worn out within a week or two. While throttles are effective for balancing resistance, they suffer from two major drawbacks: fixed opening rates and localized high-velocity wear. In addition, conventional air volume control valves, such as flap and butterfly types, are prone to wear due to their structural design, which causes uneven airflow and increased dust impact. These issues result in frequent maintenance and economic losses. Current solutions either use thick steel or expensive wear-resistant materials, which do not address the root cause of wear and significantly increase costs. This paper introduces a new wear-resistant throttle air volume control valve that combines the functions of both a throttle and an air volume control valve, offering improved performance and durability. **2. Structure and Working Principle of the Wear-Resistant Throttle Air Volume Control Valve** As shown in Figure 3, the wear-resistant throttle air volume control valve consists of a valve body, a movable porous plate, a fixed porous plate, and an adjustable mechanism. Both plates have identical openings, which can be either circular or slot-shaped (as seen in Figure 4). The adjustment mechanism uses a double gear and rack drive system, isolated from the dusty airflow to prevent clogging and rust. This design ensures smooth operation and long-term reliability. By rotating the adjustment knob, the movable porous plate moves left or right, changing the effective opening area and thus regulating the airflow. When the openings of the movable and fixed plates align completely, the valve reaches its maximum opening. Conversely, when the openings are fully offset, the valve is at its minimum opening. An indicator on the adjustment device allows for quick and accurate reading of the current opening percentage. The valve operates based on the principle of small-hole jet diffusion and superposition. As air passes through the fixed and movable porous plates, parallel jets mix and spread within a confined space. As shown in Figure 5, when two jets come close, they interfere with each other before merging into a single, uniformly mixed jet. The mixing occurs within a short distance, typically less than 100 mm, ensuring even velocity distribution across the cross-section of the valve. The jet diffusion angle (θ) is usually between 2° and 16°, with the well-mixed position occurring at a distance x = b / tanθ, where b is the width of the hole or slot. Using b = 15 mm and θ = 12°, the mixing point is approximately 71 mm from the plates. This design minimizes high-speed airflow impacts on the valve body and downstream piping, reducing wear. Additionally, the porous structure prevents vortex formation at the junctions, further decreasing dust erosion. The valve also avoids high-impact angles by directing dust particles away from critical areas, where wear is most severe (typically between 20° and 30° incidence angles). **3. Conclusion** The wear-resistant throttle air volume control valve represents a significant advancement in dust removal system technology. It effectively replaces traditional throttles and air volume control valves while overcoming their limitations. Its simple structure, low cost, and long service life make it a highly practical solution. With an expected lifespan 3–5 times longer than conventional valves, it reduces maintenance frequency and operational costs. Moreover, it can be installed anywhere without adverse effects on nearby fittings, and its dual-gear drive mechanism is resistant to rust, unlike screw-driven alternatives. Overall, this valve offers a reliable, efficient, and economically viable solution for airflow regulation in industrial dust removal systems. Its successful development promises substantial economic and environmental benefits, with strong potential for widespread application in various industries. **References** [1] Yao Qun et al. Dust pipe wear and abrasion-proof measures. Building Thermal Ventilation and Air Conditioning, 2000, 1. [2] Tan Tianyou, Liang Fengzhen. Industrial Ventilation and Dust Removal Technology. Beijing: China Building Industry Press, 1988, p. 130. [3] Chen Wansheng et al. WISCO four burning dust removal system air volume balance debugging. Industrial Safety and Environmental Protection, 2001, 8.

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