What is used for desulfurization in power plants? ——Comprehensive analysis of mainstream desulfurization technologies and applications
As environmental protection policies become increasingly strict, power plant desulfurization technology has become the focus of the industry. This article will combine the hot topics and hot content on the entire network in the past 10 days to systematically analyze the current mainstream methods, technical comparisons and practical application cases of power plant desulfurization, helping readers quickly grasp industry trends.
1. Comparison of mainstream desulfurization technologies
At present, power plants mainly use four technologies for desulfurization: limestone-gypsum method, ammonia method, seawater method and semi-dry method. Their advantages and disadvantages are compared as follows:
| technology type | Desulfurization efficiency | investment cost | running cost | by-products |
|---|---|---|---|---|
| Limestone-gypsum method | ≥95% | high | 0.8-1.2 yuan/kgSO₂ | plaster |
| ammonia method | ≥98% | higher | 1.0-1.5 yuan/kgSO₂ | Ammonium sulfate |
| seawater law | 90-95% | lower | 0.3-0.6 yuan/kgSO₂ | none |
| Semi-dry method | 80-90% | Low | 0.5-0.8 yuan/kgSO₂ | ash |
2. Current status of technology application
According to the latest industry data in 2023:
| technology type | market share | New project adoption rate | Retrofit project adoption rate |
|---|---|---|---|
| Limestone-gypsum method | 65% | 50% | 70% |
| ammonia method | 15% | 25% | 10% |
| seawater law | 12% | 15% | 8% |
| Semi-dry method | 8% | 10% | 12% |
3. Hot technological breakthroughs
Recently, the industry has focused on two innovative technologies:
1.Organic amine recycling method: The new desulfurizer developed by the Zhejiang University team has a desulfurization efficiency of 99.5% and a 40% reduction in operating costs. It has been applied in three pilot projects.
2.Biological Desulfurization Technology: Using sulfur-oxidizing bacteria to treat flue gas without secondary pollution, a power plant in Germany has achieved industrial application. The country is expected to complete the construction of the first set of equipment in 2025.
4. Typical case analysis
| Power plant name | Installed capacity | Desulfurization technology | annual emission reductions |
|---|---|---|---|
| A coastal power plant of Huaneng | 2×1000MW | seawater law | 120,000 tons of SO₂ |
| A coal power base in Datang | 4×660MW | Limestone-gypsum method | 280,000 tons of SO₂ |
| A Guodian Cogeneration Company | 3×350MW | ammonia method | 90,000 tons of SO₂ |
5. Future development trends
1.Multi-pollutant collaborative control: The research and development of integrated desulfurization, denitrification and dust removal technology is accelerating, and the market share is expected to increase to 30% in 2024.
2.Carbon Reduction Link: The new version of the "Air Pollutant Emission Standards for Coal-fired Power Plants" links desulfurization efficiency with carbon emission indicators to promote technological upgrading.
3.Intelligent operation and maintenance: The application rate of AI predictive maintenance system in desulfurization units has exceeded 20%, which can reduce unplanned downtime by 15%.
Conclusion: The selection of desulfurization technology for power plants needs to comprehensively consider environmental protection requirements, economic benefits and resource conditions. With technological advancement and policy guidance, more efficient and economical desulfurization solutions will continue to emerge, providing key support for the green transformation of the power industry.
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