De-Duster Rotary Airlock Valve

The De-Duster Rotary Airlock Valve (also known as a star-shaped ash discharge valve or airlock ash discharge valve) is an indispensable core airlock and ash discharge accessory in industrial dust removal systems. Leveraging the company's years of experience in bulk material handling and dust removal technology, it is specifically designed for ash discharge operations in dust collector hoppers. Integrating core advantages such as precision airlocking, wear resistance, and anti-jamming/anti-clogging, it achieves "continuous ash discharge, efficient airlocking, and stable compatibility." It effectively solves pain points such as dust leakage, air pressure imbalance, and equipment blockage during ash discharge in dust removal systems. It is the preferred accessory for various dust removal equipment such as bag filters, cyclone dust collectors, and pulse jet dust collectors, and is widely used in dust removal systems across multiple industries including metallurgy, chemical, building materials, power, and mining.

As a key piece of equipment in the gas-solid separation process of a dust removal system, this product focuses on three core functions: connecting the dust collector's hopper with the ash conveying system, ensuring stable negative pressure in the dust removal system, smooth ash discharge, preventing secondary pollution, and contributing to environmental compliance.

High-efficiency airtight seal : Adopting a precision gap design and multiple sealing structure, the impeller and valve cavity fit together perfectly, forming a solid airtight barrier. This effectively prevents outside air from entering the dust collector hopper, maintains stable negative pressure in the system, avoids affecting dust removal efficiency due to air pressure imbalance, and eliminates secondary pollution caused by dust leakage, ensuring a clean workshop environment.

Continuous quantitative ash discharge : The impeller is driven by a motor and reducer to rotate at a uniform speed, and the dust collected in the dust collector hopper is discharged evenly and continuously to the ash conveying equipment (scraper conveyor, bucket elevator, etc.). The variable frequency speed regulation can be used to adapt to different dust emission volumes, avoid dust accumulation and blockage of the hopper, ensure the continuous and stable operation of the dust removal system, and realize dust recycling and reuse.

Anti-jamming and anti-clogging compatibility : Optimized impeller structure and flow channel design, equipped with pressure equalization exhaust port to reduce gas backing phenomenon, facilitate smooth dust fall, and adapt to dust with different characteristics (fine powder, coarse powder, slightly sticky dust, etc.), effectively prevent dust agglomeration and material jamming, while also having a certain wear resistance, and is suitable for high dust and high frequency ash unloading conditions in dust removal systems.

1. Precision airlock ensures system stability.

Employing a dual-sealing structure (main seal + auxiliary seal) and high-precision machining, the impeller-valve cavity gap is controlled at 0.1-0.2mm, achieving near-zero leakage at ANSI Class VI level with an air leakage rate of ≤0.5%. This effectively maintains stable negative pressure in the dust collector system, preventing a decrease in dust removal efficiency due to air backflow. The seals are made of wear-resistant and temperature-resistant materials, capable of withstanding complex operating conditions in the dust collection system. They are not prone to aging or failure, balancing sealing performance and service life, thus building a solid defense against dust leakage.

2. Wear-resistant and damage-resistant, suitable for high-dust working conditions.

Parts exposed to dust are made of QT600-3 ductile iron, high-chromium cast iron, or wear-resistant alloy steel. The impeller blades are hardened with carbide (HRC≥50) and specially reinforced for high-wear dust conditions to effectively resist continuous dust friction and significantly extend the service life of the equipment. The bearing housing is moved outside the valve body to cut off the direct contact between dust and bearing, further extending the service life of bearing and reducing later maintenance costs.

3. Anti-jamming and anti-blocking, making operation more reliable.

It adopts a flexible impeller and optimized flow channel design, and the inlet and outlet sections of the shell are specially treated to effectively prevent the extrusion, jamming, and shearing of particulate materials; equipped with a blockage removal structure, it can quickly handle slightly agglomerated dust and avoid the dust removal system shutdown caused by equipment blockage; driven by a cycloidal pinwheel reducer, it runs smoothly and with uniform speed (it can achieve precise speed adjustment of 15-30 rpm), has a low failure rate, can run continuously for a long time, and is suitable for the 24-hour uninterrupted ash unloading needs of dust removal systems.

4. Compact structure and strong installation adaptability.

Featuring a compact design, it is small in size and aesthetically pleasing, occupying little installation space. It can be flexibly installed under the ash hopper of various dust collectors, supporting horizontal or vertical installation. With a standardized interface design and flange connection, it can be seamlessly connected to various dust collection equipment such as bag dust collectors, cyclone dust collectors, and pulse dust collectors. It is also compatible with ash conveying equipment such as scraper conveyors and bucket elevators, requiring no complicated modifications and offering convenient and efficient installation.

5. Easy to maintain and low operating costs.

With a modular design, core components (impeller, seals) can be quickly disassembled and replaced, and daily cleaning and maintenance do not require complicated tools, greatly saving maintenance time; the standard configuration of vulnerable parts makes procurement and replacement convenient, and they are wear-resistant and have a long service life, reducing the frequency of replacement of vulnerable parts; the equipment has low vibration and low noise during operation, with minimal impact on the surrounding environment, further reducing operation and maintenance costs and labor input.

Specifically designed for ash unloading conditions in various dust collection systems, it is widely used in industries that generate dust, such as metallurgy, chemical industry, building materials, power, mining, cement, and machining. It is especially suitable for:

• The ash hopper unloading process of various dust removal equipment such as bag filters, pulse dust collectors, and cyclone dust collectors enables continuous dust emission and recycling;
• High dust conditions: Suitable for scenarios with large dust emissions, such as cement plants, mines, and thermal power plants, and is adapted to the large flow rate of ash removal of 1-3m³ per hour with a single valve.
• The unloading and conveying of dust with different characteristics, such as fine powder (e.g., cement powder, mineral powder), coarse powder (e.g., ore powder), and slightly sticky dust, can realize dust recycling and reuse, reducing material waste and environmental pressure.
• Negative pressure dust removal system: Dust removal equipment for various production lines that require maintaining stable negative pressure, such as machine tool processing and polishing, powder processing, metallurgical smelting and other scenarios.

Shanghai Hanye Engineering Technology Co., Ltd. is committed to customer needs, deeply rooted in the field of bulk material handling and dust removal solutions. Focusing on the pain points of industrial dust removal and ash unloading, we provide customers with efficient, stable, and durable De-Duster Rotary Airlock Valve and related solutions, leveraging our professional technology, reliable quality, and comprehensive service. For detailed product parameters, operating condition adaptation solutions, on-site case studies, or customization needs, please feel free to contact us!