Equipment Description:
I. Core Structure and Function
1. Exhaust System
Comprising a corrosion-resistant blower (e.g., fiberglass/polypropylene), air ducts, and a gas collection hood, this system is used to quickly extract acid mist, cyanide waste gas, and other gases generated in the electroplating workshop away from the work area.
Air volume ranges from 1000-50,000 m³/h, with a pressure of 800-2000 Pa, adjustable based on workshop area and waste gas concentration.
2. Acid Mist Spray Tower (Core Purification Unit)
Tower: Constructed of PP/fiberglass, resistant to acid and alkali corrosion (e.g., sulfuric acid, nitric acid, and hydrofluoric acid), the tower features multiple spray and packing layers.
Spray System: Equipped with spiral nozzles (atomized particle size 50-200μm), the spray liquid is a NaOH solution (concentration 5-10%), neutralizing acidic gases through countercurrent contact. Packing Layer: Filled with multi-faceted hollow spheres or Raschig rings with a specific surface area of ≥300 m²/m³, enhancing gas-liquid mass transfer efficiency and raising purification rates to 90%-95%.
Mist Eliminator: Wire mesh/baffle structure separates liquid droplets from the gas, ensuring exhaust humidity ≤50 mg/m³.
3. Auxiliary Treatment Devices
Activated Carbon Adsorption Tower: Targets cyanide-containing waste gas and organic VOCs, degrading pollutants through activated carbon adsorption, with an adsorption efficiency of ≥85%.
Dry Filter: A pre-filter layer (e.g., fiberglass) intercepts dust and oil mist, protecting downstream equipment.
II. Technical Parameters and Performance
| Parameter Category | Specific Specifications |
| Air Volume | 1000-50,000 m³/h (customizable) |
| Applicable Exhaust Gas Type | Nitric acid mist, hydrochloric acid mist, chromic acid mist, cyanide, VOCs, etc. |
| Spray Liquid Circulation Volume | 5-20 m³/h (adjusted based on exhaust gas concentration) |
| Purification Efficiency | Acid gas concentration 90%-95%, cyanide concentration ≥85% |
| Operating Temperature | ≤80°C (high-temperature exhaust gas requires pre-cooling) |
III. Application Scenarios
Pickling/Passivation Process: Treats sulfuric acid and nitric acid mist, reducing irritating workshop odors.
Chromium/Galvanizing Process: Purifies highly toxic gases such as chromic acid mist and hydrogen cyanide.
Stripping/Cleaning Process: Intercepts VOCs produced by the volatilization of organic solvents.
IV. Equipment Advantages
1. Strong Corrosion Resistance: Stainless steel/fiberglass materials withstand highly corrosive media such as hydrofluoric acid and concentrated sulfuric acid.
2. Modular Design: Supports multiple towers in series or parallel, adapting to complex exhaust gas compositions.
3. Low Energy Consumption: The circulating water system reduces chemical consumption, and automated control reduces labor costs.
4. High Safety: Explosion-proof fans and emergency discharge valves prevent gas accumulation and explosions.
V. Key Operations and Management Points
1. Daily Maintenance: Monitor the pH of the circulating fluid daily (recommended pH = 8-10) and regularly replenish NaOH solution.
Clean nozzle blockages monthly and replace the packing layer and activated carbon every six months. 2. Troubleshooting: Abnormal fan vibration: Check the impeller for corrosion or dust accumulation and replace it promptly.
Decreased purification efficiency: Check the spray liquid concentration, packing blockage, or activated carbon saturation.
Main structures and components:
I. Core Components
1. Motor
Provides power for the equipment, typically using an AC asynchronous motor or a DC motor. Power is customized based on the air volume handled (1,000-100,000 m³/h).
2. Impeller
The core compression component, composed of blades made of corrosion-resistant metal (such as stainless steel or copper). The blade shape and angle directly affect air volume, pressure, and efficiency.
3. Fan Case
The outer casing is welded or riveted from steel plates, housing the impeller and deflector. It must be highly leak-tight and corrosion-resistant to prevent leakage of acidic and alkaline gases.
4. Air Inlet/Outlet
Air Inlet: Equipped with a filter to intercept large particles (such as metal dust and liquid droplets) and reduce equipment wear.
Air Outlet: Optimize airflow guidance design to ensure efficient exhaust gas discharge and meet environmental standards.
II. Auxiliary Structures
1. Deflector
Directs airflow evenly into the impeller, improving air volume utilization. The material must be corrosion-resistant (such as stainless steel coating). 2. Brackets and Bearings
Brackets: Support the overall fan structure and must possess high strength and vibration resistance.
Bearings: Support the smooth operation of the impeller, typically using rolling bearings or corrosion-resistant sliding bearings.
3. Circulation System (Combined Equipment)
When used in conjunction with a spray tower, activated carbon adsorption tower, or other equipment, an acid- and alkali-resistant circulation pump and piping are required to achieve multi-stage exhaust gas purification.
III. Differentiated Design and Materials
1. Corrosion-Resistant Material Selection
For strong acids (such as hydrochloric acid and sulfuric acid), strong bases, and organic solvents in electroplating exhaust gas, 316L stainless steel, fiberglass reinforced plastic (FRP), or surface-coated metals are preferred.
For high-concentration chlorine or hydrofluoric acid exhaust gas, a FRP fan with Teflon coating is required to enhance pitting corrosion resistance.
2. Layout Compatibility
Horizontal fans: Suitable for high air volume (>50,000 m³/h), such as centralized exhaust in electroplating workshops. Vertical blowers: Compact design, suitable for combined systems with limited space (e.g., after-spray tower placement).
IV. Application Scenarios and Operation and Maintenance Key Points
1. Typical Applications
Acidic waste gases: Such as nitric acid and hydrofluoric acid mists require neutralization with an alkaline spray tower.
Organic waste gases: Such as VOCs, combined with activated carbon adsorption or photocatalytic oxidation equipment improves purification efficiency.
2. Operation and Maintenance
Regular Cleaning: Check the filter and impeller for fouling every 1-3 months to prevent blockage and reduced airflow.
Explosion-Proof Design: When handling flammable waste gases, an explosion-proof motor and emergency exhaust device are required.
Features:
1.High cost performance: Based on the customer's product positioning and development strategy, and with economic affordability as the foundation, we achieve the best cost performance.
2.The advanced and meticulous design concept of the equipment, along with the highly automated industrial equipment, showcases the image of a modern and advanced enterprise.
3. It has high adaptability, meeting the current production requirements and reserving room for development, taking into account the needs of increased production and improved quality in the future.
4.Quality compliance strictly adheres to the ISO900 quality management system, with every minute detail of the entire equipment installation being strictly controlled.
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