PP Swirl Tower

Product Model	PP-X Series (φ800-φ3000)
Category	Waste Gas Treatment Equipment
Reference Price	Price on request

Hot Customizable for Working Conditions 13 Technical Parameters

Product Overview

The PP Cyclone Tower, also known as a Cyclone Plate Tower, Cyclone Purification Tower, or Cyclone Dust Removal Tower, is a wet scrubbing device designed for paint mist, viscous exhaust gas, and dusty conditions. The exhaust gas is introduced into the tower through ductwork and passes through multiple cyclone vanes and the spray system. Utilizing the inertia collision, centrifugal separation, and liquid film adhesion between particles and droplets, dust or paint sludge is collected at the bottom of the tower, while purified gas is dehumidified by an demisting section before being discharged into the atmosphere via a fan. The equipment is fabricated from corrosion-resistant, acid/alkali-resistant, UV-resistant, and flame-retardant PP materials. It features a rational structure and stable operation, making it a commonly used device for exhaust gas treatment in industries such as painting, spray coating, and metal grinding.

Working Principle

The Cyclone Tower incorporates a multi-layer cyclone vane structure, replacing the packing layer of traditional spray towers to fundamentally prevent clogging caused by viscous exhaust gas and dust. The first layer of cyclone vanes uses clockwise spray, while the second layer uses counterclockwise spray. The alternating clockwise and counterclockwise gas phases enhance the inertia collision, centrifugal separation, and liquid film adhesion, causing dust or paint sludge to flow into the tower bottom. Multiple cyclone units are designed inside the tower. The primary purified flue gas rises in a rotating motion. The cyclone aerodynamic device provides guidance and assistance, generating aerodynamic cyclones using the inherent kinetic energy of the flue gas for efficient gas-liquid contact and mass transfer. The third layer is the demisting header, which removes moisture and mist to prevent liquid from being carried out with the gas.

Structural Components

The equipment, from bottom to top, primarily consists of an inlet, a liquid storage tank, a circulation pump, cyclone vane layers, a spray system, inspection windows, a demisting header, and an outlet. The cyclone vanes replace the packing layer of traditional spray towers, eliminating clogging issues caused by viscous exhaust gas and dust. The spray system features multi-layer nozzles for uniform spray distribution. The demisting header removes moisture and mist, reducing liquid carryover to protect downstream fans. Standard equipment includes spray pipes, ball valves, flow meters, differential pressure gauges, tank covers, water replenishment and drainage kits, and high-flow pumps. All components are designed in standardized modular configurations, ensuring easy on-site installation and maintenance.

Tower Type Comparison

The core difference between the Cyclone Tower and conventional packing spray towers lies in their internal structures. Conventional spray towers rely on packing layers to increase gas-liquid contact area, suitable for general acid/alkali gases and acid mists. Cyclone Towers utilize centrifugal separation and liquid film adhesion generated by cyclone vanes, making them more suitable for viscous exhaust gases like paint mist and dusty conditions while minimizing clogging. Cyclone Towers are available in two types: fill-free and fill-added. The fill-free type consists of multi-layer cyclone plates and a spray layer, offering a simple structure with lower pressure drop. The fill-added type includes cyclone plates, packing layers, and a spray layer, suitable for non-viscous, non-clogging exhaust gas treatment. Selection can be tailored to exhaust gas properties.

Specification Model Table

Model	Tank Body (mm)	Base Plate (mm)	Spray Layers	Cyclone Vanes	Demisting Layer	Inspection Window Size (mm)	Outlet (mm)
φ800	8	8	2/1	Counter-rotating	Header	φ400	φ315
φ1000	8	10	2/1	Counter-rotating	Header	φ400	φ355
φ1200	8	10	2/1	Counter-rotating	Header	φ400	φ400
φ1500	8	10	2/1	Counter-rotating	Header	φ500	φ500
φ1800	10	10	2/1	Counter-rotating	Header	φ500	φ600
φ2000	10	12	2/1	Counter-rotating	Header	φ500	φ650
φ2200	10	12	2/1	Counter-rotating	Header	φ500	φ700
φ2500	12	12	2/1	Counter-rotating	Header	φ500	φ800
φ2800	12	15	2/1	Counter-rotating	Header	φ500	φ900
φ3000	12	15	2/1	Counter-rotating	Header	φ500	φ1000

The above are ten standard models. Standard equipment includes spray pipes, ball valves, flow meters, differential pressure gauges, tank covers, water replenishment and drainage kits, and high-flow pumps. Cyclone vane layers and structures can be customized based on exhaust gas properties, with non-standard customization available for special conditions.

Product Features

Uses PP/PPs flame-retardant materials, acid/alkali-resistant, UV-resistant, and flame-retardant, with long service life
Multi-layer counter-rotating cyclone vanes for centrifugal separation and liquid film adhesion, achieving high dust removal efficiency
Cyclone vanes replace packing layers, minimizing clogging and suitable for viscous exhaust gas and dusty conditions
Demisting header removes moisture, reducing liquid carryover to protect downstream fans
Absorption liquid is recycled, reducing water and chemical consumption for lower operating costs
Comprehensive standard models available, with non-standard customization based on site conditions

主体材质	PP/PPs 阻燃聚丙烯
塔型结构	旋流叶片式
板材特性	防腐、耐酸碱、抗 UV、阻燃
标准规格范围	φ800-φ3000
桶身壁厚	8-12mm
底板厚度	8-15mm
旋流叶片结构	头层顺时针加二层逆时针双向喷淋
除雾方式	除雾大小头脱水除雾
视窗规格	φ315/φ400/φ500
出风口规格	φ315-φ1000
处理对象	漆雾、粘性废气、含粉尘废气
塔型	立式
安装方式	室内外均可

Application Industries

Pre-treatment of paint mist and sticky exhaust gas in coating and spray painting industries
Exhaust gas treatment containing dust in metal grinding and polishing industries
Production dust exhaust gas treatment in building materials and cement industries
Exhaust gas treatment containing wood chips and paint mist in woodworking and furniture industries
Exhaust gas treatment containing flue gas and dust in rubber and plastic industries
Exhaust gas treatment containing grease and dust in food processing industries
Dust-containing exhaust gas washing and purification in chemical and metallurgical industries

Typical Process Location

The typical exhaust gas treatment process involves collecting exhaust gas through hoods or ducts, which first enters a PP swirl tower for dedusting, cooling, and washing. Then, based on the pollutant composition, it proceeds to deep treatment equipment such as activated carbon adsorption boxes. Subsequently, it is discharged through a PP corrosion-resistant fan via an exhaust stack, meeting emission standards. For scenarios with high paint mist concentration, the swirl tower can serve as a front-end pre-treatment device, effectively protecting the downstream activated carbon adsorption layer from clogging. Xicheng Environmental can provide complete equipment including swirl towers, activated carbon adsorption boxes, PP fans, PP flame-retardant ducts, and dampers, along with one-stop services for solution design, installation, and commissioning. In actual projects, the selection of the swirl tower must be determined based on exhaust gas concentration, dust particle size, and treatment airflow. An undersized tower may result in excessively high airflow velocity and reduced dedusting efficiency, while an oversized tower increases equipment costs and footprint. It is recommended to conduct operational calculations by professional technicians during the system design phase to ensure the swirl tower's parameters match downstream equipment such as fans and activated carbon adsorption boxes, achieving optimal overall system performance.

The PP Cyclone Tower is a wet dedusting and purification equipment. The exhaust gas is introduced into the tower through ducts and, as it passes through multiple swirl blades, undergoes counter-rotating liquid spraying: clockwise blades in the first layer and counterclockwise blades in the second layer. The alternating collision of the gas phases enhances the separation of dust or paint mist residue through inertial collision, centrifugal separation, and liquid film adhesion, causing them to flow into the bottom of the tower. The swirl device utilizes the kinetic energy of the flue gas to generate aerodynamic swirl, enabling thorough contact between the gas and liquid phases for mass transfer reactions. The purified gas is then discharged by the fan after dehydration and mist removal in the third layer's mist separator. The absorption liquid falls to the bottom of the tower, where it is pressurized by a pump and recirculated for spraying.

Both are wet exhaust gas purification equipment, but their internal structures and applicable conditions differ. Standard spray towers rely on a packing layer to increase gas-liquid contact area, suitable for conventional acid-base waste gas and acid mist treatment, but viscous waste gas and dust can easily cause packing blockage. Cyclone towers utilize centrifugal separation generated by multi-layer swirling vanes and liquid film adhesion to remove dust, making them more suitable for viscous exhaust gas such as paint mist and conditions with higher dust content, and less prone to blockage. Cyclone towers have relatively higher resistance, requiring matching fans with higher pressure when selecting.

The cyclone tower is primarily used for treating paint mist, viscous exhaust gas, and dust-laden exhaust gas, such as paint mist exhaust gas in the coating spraying industry, dust-containing exhaust gas in the metal grinding and polishing industry, dust exhaust gas in the building materials and cement industry, wood dust and paint mist exhaust gas in the woodworking and furniture industry, and smoke and dust exhaust gas in the rubber and plastic industry. For conventional acid-base exhaust gas, a standard packed tower can be selected; for high-concentration or difficult-to-treat exhaust gas, a series configuration of cyclone tower and packed tower or a multi-stage cyclone tower combination process can be adopted. For exhaust gas containing organic pollutants, an activated carbon adsorption box can be connected in series after the cyclone tower for deep treatment.

The cyclone tower is available in two types: packed and unpacked. The unpacked type consists of multiple cyclone plates and a spray layer as its core components, featuring a simple structure, low pressure drop, and completely avoiding the maintenance challenges of packed bed clogging. It is primarily used for treating viscous, oily, or fiber-containing exhaust gases, or in scenarios where only dust removal and cooling are required. The packed type consists of cyclone plates, a packing layer, and a spray layer as its core components, mainly used for treating non-viscous, non-clogging exhaust gases, which can further enhance gas-liquid contact area and purification efficiency. The specific selection should be determined based on the nature of the exhaust gas.

In organic waste gas treatment systems, cyclone towers are typically used as front-end pretreatment equipment to first remove paint mist, dust, and particulates from the waste gas, preventing these substances from clogging the downstream activated carbon adsorption layer and extending the service life of the activated carbon. After pretreatment by the cyclone tower, the waste gas enters the activated carbon adsorption box for deep purification to remove VOC organic pollutants. The typical process involves: waste gas collection by hood, followed by dust removal and washing in a PP cyclone tower, then adsorption and purification in an activated carbon adsorption box, and finally discharge through a PP fan via an exhaust stack in compliance with emission standards.

The selection primarily requires the following parameters: First, the nature of the exhaust gas, including pollutant composition, concentration, whether it contains viscous substances or dust; second, the treatment air volume, measured in cubic meters per hour; third, the exhaust gas temperature and humidity; fourth, the on-site installation space, including height and footprint limitations; fifth, the required purification efficiency and the applicable emission standards; sixth, material preferences. Providing these parameters allows for matching the tower diameter, number of swirl blade layers, and circulating water pumps. Standard tower diameters cover φ800 to φ3000, and non-standard designs are available for special conditions.

The circulating liquid in the cyclone tower requires regular maintenance to ensure purification efficiency. During operation, the pH and suspended solids concentration of the circulating liquid should be checked regularly. When dust or paint mist sediment accumulates excessively in the circulating liquid, the circulating liquid should be replaced promptly, and the sediment at the bottom of the tower should be cleaned. It is recommended to configure a water replenishment and drainage device for regular effluent discharge and water replenishment. The circulating liquid should be avoided from being discharged arbitrarily and must be discharged after being treated in accordance with environmental protection requirements. Meanwhile, it is necessary to regularly check whether the spray nozzles are blocked and whether the swirl vanes are coated with dust, and perform timely cleaning and maintenance. During winter operation, attention should be paid to anti-freezing. When necessary, insulation measures should be taken or the circulating liquid should be drained regularly.

The cyclone tower is suitable for installation in industrial settings where paint mist, viscous exhaust gas, or dust-containing exhaust gas is generated, such as spray booths, sanding workshops, polishing production lines, and building material production workshops. The equipment features a vertical structure, occupies minimal space, and can be installed both indoors and outdoors. For locations with limited installation height, options such as horizontal spray towers or non-standard designs with reduced tower height can be considered. The cyclone tower can be paired with PP fans, activated carbon adsorption boxes, and PP ducts to form a complete exhaust gas treatment system.

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