Advanced Tower Structure Environmental Protection Equipment for Acid Mist and

Product Specification

Equipment Description:

I. Core Structure and Working Principle

Tower Structure
Made of polypropylene (PP), it offers a temperature resistance range of -10°C to 100°C and can withstand corrosion from strong acids and alkalis up to a concentration of 70%, with a service life of 10-15 years.
The main structure comprises a spray system (spiral nozzles), a packing layer (ball rings/polygonal hollow spheres), a demisting layer (baffles/wire mesh), and a circulating water tank.
Purification Process
Exhaust Gas Intake: Acidic/dust-laden exhaust gas is conveyed to the bottom of the tower by a fan, forming a swirling upward flow.
Neutralization Reaction: The spray liquid (e.g., NaOH solution) is atomized and countercurrently contacts the exhaust gas, removing pollutants through chemical neutralization (e.g., HCl + NaOH → NaCl + H₂O) or physical adsorption.
Multi-stage Purification: The packing layer increases the gas-liquid contact area, improving mass transfer efficiency; the demisting layer intercepts liquid droplets, ensuring that the gas meets emission standards.

II. Technical Advantages and Performance Parameters

High-Efficiency Purification Capacity
Acid mist (HCl, H₂SO₄, etc.) removal rate: 95%-99%, VOCs comprehensive purification efficiency: 70%-85%.
PM2.5+ particle interception rate: ≥90%, paint mist and dust treatment simultaneously.
Economic Operation
The modular design reduces installation and maintenance costs by 30%. Reusable circulating fluid reduces chemical consumption by 30% compared to traditional equipment.
Low energy consumption (wind resistance ≤ 800 Pa), suitable for air volumes ranging from 200 to 50,000 m³/h.
Safety and Environmental Protection
Equipped with an explosion-proof blower and flame-retardant PP material, it complies with GB16297-1996 emission standards.
The closed design, combined with the paint mist treatment system, maintains a stable VOC emission concentration of <20 mg/m³.

III. Typical Application Scenarios

Chemical/Electroplating Industry: Treats highly corrosive acid mists such as HCl and H₂SO₄. Case studies show annual maintenance costs of less than 20,000 yuan.
Painting/Spray Painting Shops: Purifies paint mist (such as benzene and xylene) and organic waste gases, achieving a VOC degradation efficiency of 70%-85%.
Laboratory/Electronics Industry: Treats welding fumes, metal dust, and mixed waste gases from physical and chemical laboratories.

IV. Selection and Operation and Maintenance Key Points

Selection Parameters
Air Volume Matching: Choose a vertical (compact) or horizontal (high-concentration waste gas) configuration based on space requirements.
Pretreatment Configuration: Exhaust gases containing oil mist or high dust content require a cyclone separator or dry filter.
Operation and Maintenance Management
Regularly monitor the pH of the circulating fluid (a pH of 6-8 or 8-10 is recommended for acidic and alkaline waste gases). Clean/replace the packing layer every 3-6 months. High-temperature exhaust gas (>80°C) requires a pre-cooling device to prevent softening and deformation of the PP material.

V. Optimization Suggestions

Multi-stage cascade: For complex exhaust gases (such as acid mist and VOCs), an activated carbon adsorption tower or UV photolysis equipment can be combined to increase the overall purification efficiency to over 95%.
Intelligent Control: An integrated automatic pH adjustment system and remote monitoring module reduce the frequency of manual intervention.

Main structures and components:

1. Tower Body

The core structure is made of polypropylene (PP), which is highly corrosion-resistant and resistant to acidic and alkaline media (concentration ≤ 70%). It is typically a vertical cylindrical or square design.

The interior contains multiple functional areas, with a circulating water tank/sump at the bottom, an air outlet at the top, and an air inlet at the bottom to ensure even distribution of exhaust gas.

2. Spray System

Comprising spray pipes, spiral nozzles, and a circulation pump, it atomizes and sprays the absorption liquid (such as water or chemicals) using high pressure, creating countercurrent gas-liquid contact.

Nozzles are typically made of corrosion-resistant PP or ceramic, and the atomization effect directly affects pollutant removal efficiency.

3. Packing Layer

Located in the center of the tower, it is filled with high-efficiency packing such as Pall rings, Raschig rings, or porous hollow spheres to increase the gas-liquid contact area and enhance mass transfer reactions.

The packing layer height is typically 0.5-2 meters, adjusted based on exhaust gas concentration and treatment air volume.

4. Demisting Layer

This layer is located above the packing layer and utilizes baffles, mesh, or a cyclone structure to separate liquid droplets and residual particulate matter from the purified gas, preventing secondary contamination.

The demisting efficiency can reach over 95%, ensuring that the exhaust gas meets dryness standards.

5. Circulating Water System

Includes a circulating pump, water tank, and piping, ensuring continuous circulation of the spray liquid, reducing operating costs.

Some units are equipped with a dosing system for automatic replenishment of acid and alkali reagents (such as NaOH/H₂SO₄) to maintain the activity of the absorbent liquid.

6. Auxiliary Control Components

Electrical Control System: Integrates a PLC control cabinet, liquid level sensor, and pH monitor for automated operation.

Inspection Window/Inspection Port: Conveniently monitors packing status, clears blockages, and performs maintenance.

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.