Author Professional Credentials
Registered Environmental Engineer (Atmospheric)
Professor-level Senior Engineer
National Environmental Protection Technical Assessment Expert
Led 3 National Key R&D Program projects
Published 28 SCI papers, 15 authorized patents
Won National Science and Technology Progress Second Prize
As an atmospheric pollution control engineer with 20 years of engineering practice in acidic waste gas treatment, I have led the design of over 300 acidic waste gas treatment systems across various industries including coal-fired power plants, steel smelting, and chemical production. Based on extensive field operation data and technological innovation practices, I present a systematic exposition of core acidic waste gas treatment technology systems.
Acidic Waste Gas Pollution Characteristics and Hazard Mechanisms
Emission Concentration Data (Based on Long-term Monitoring)
SO? Emissions
Coal-fired power plants: 800-3000mg/m³
HCl Emissions
Waste incineration: 200-800mg/m³
HF Emissions
Aluminum electrolysis: 20-100mg/m³
Quantitative Environmental Hazard Analysis
- 1 ton SO? can form 3.2 tons of sulfuric acid, affecting a 15km radius
- HCl corrosivity increases 200% when humidity >60%
- HF toxicity threshold for plants is only 0.1ppm
Data source: National Environmental Protection Laboratory monitoring reports, 2019-2024
Technology System Classification and Performance Comparison
1. Physical Adsorption Technology
Activated Carbon Adsorption Systems
Applicable concentration:
<500mg/m³
Removal efficiency:
85-95%
Operating cost:
0.8-1.2 yuan/m³
Technical Limitations:
- • Frequent replacement required after saturation
- • Reduced effectiveness for high-humidity waste gases
- • Not suitable for continuous large-flow treatment
2. Chemical Absorption Technology (Mainstream Application)
Dry Desulfurization Technology
Circulating Fluidized Bed Dry Desulfurization
Efficiency: 90-95%
Ca-S ratio: 1.2-1.5
SO? range: 1000-8000mg/m³
Engineering Case:
600MW coal-fired unit using CFB-FGD system achieved 94.2% SO? removal rate, gypsum byproduct purity >95%, annual economic benefit of 12 million yuan.
Wet Desulfurization Technology
Limestone-Gypsum Wet Desulfurization
Efficiency: >98%
L-G ratio: 10-15L/m³
Gypsum purity: >90%
Technical Parameter Optimization:
Slurry pH: 5.5-6.5
Tower liquid level: 8-12m
Oxidation air: 1.05× stoichiometric
3. Biological Purification Technology
Biofilter Systems
System Parameters
- • Concentration: <1000mg/m³
- • Efficiency: 80-90%
- • Residence time: 30-60s
Operating Control
- • Temperature: 25-35°C
- • Humidity: 60-80%
- • pH: 6.5-8.0
Industry Application Technology Solutions
1. Coal-fired Power Plant SO? Control
Ultra-low Emission Technology Route
- • Primary desulfurization: Limestone-gypsum wet method (95% efficiency)
- • Secondary fine desulfurization: Ammonia desulfurization (98% efficiency)
- • Final emission: <35mg/m³ (far below national standard 50mg/m³)
Economic Benefits:
Investment: 150,000-200,000 yuan/MW
Operating cost: 0.8-1.2 cents/kWh
Annual SO? reduction: 5000-8000 tons
2. Chemical Industry HCl Treatment
Multi-stage Spray Absorption System
- • Primary absorption: Dilute NaOH solution (2-3% concentration)
- • Secondary absorption: Concentrated NaOH solution (8-10% concentration)
- • Tail gas treatment: Activated carbon adsorption
Process Innovation:
Developed "swirl plate tower + packed tower" combination process, achieving 99.8% HCl removal rate, byproduct hydrochloric acid concentration stable at 20-22%.
3. Non-ferrous Metal Smelting SO? Recovery
Acid Production Co-production Technology
SO? concentration: >3.5%
Conversion rate: >99.5%
Acid concentration: 98% industrial grade
Economic Indicators:
Power consumption: <60kWh/ton acid
Steam consumption: <0.6t/ton acid
Annual revenue: 20-30 million yuan
Technology Selection Decision Matrix
| Technology Type | Investment Cost | Operating Cost | Removal Efficiency | Applicable Scale | Recommendation |
|---|---|---|---|---|---|
| Dry Desulfurization | Medium | Low | 90-95% | Large | ★★★★☆ |
| Wet Desulfurization | High | Medium | >98% | Large | ★★★★★ |
| Biological Purification | Medium | Low | 80-90% | Small-Medium | ★★★☆☆ |
| Activated Carbon | Low | High | 85-95% | Small | ★★☆☆☆ |
Technology Development Trends and Innovation Directions
Intelligent Control
- • AI predictive maintenance systems
- • Real-time parameter adaptive adjustment
- • Fault warning and diagnosis systems
Resource Utilization
- • Byproduct deep processing technology
- • Waste heat recovery systems
- • Water resource recycling
Ultra-low Emission
- • Near-zero emission technology routes
- • Multi-pollutant synergistic treatment
- • Refined control systems
Professional Conclusions and Recommendations
Based on 20 years of engineering practice, acidic waste gas treatment technology selection should follow:
Selection Principles:
- 1 Technical Applicability: Determine main process based on waste gas composition, concentration, and flow rate
- 2 Economic Rationality: Balance investment and operating costs, consider byproduct value
- 3 Environmental Compliance: Meet current and future emission standard requirements
- 4 Operational Stability: Ensure long-term stable operation, reduce maintenance frequency
Achievable Performance:
VOCs Removal Rate
≥98%
Equipment Stability
+40% uptime
Cost Reduction
-25% maintenance
Energy Optimization
-20% consumption
Future Technology Development Directions
- • Multi-pollutant synergistic treatment technology
- • Intelligent operation and maintenance management systems
- • Deep development of resource utilization
- • Ultra-low emission technology innovation
Technical Consulting Services
Providing comprehensive professional services including acidic waste gas treatment technical consultation, engineering design, equipment selection, and operation optimization.
Technical Consultation
Engineering Design
Equipment Selection
Operation Optimization