Sodium alkali desulfurization technology

Technology introduction

Technology advantage

* Due to the sodium carbonate and caustic soda has strong alkaline, therefor the technology desulfurization efficiency is high.

* The by-product sodium sulfite or sodium sulfide has high economic value, also has good market, therefor this technology achieved the double benefits of environmental protection and economic benefits.

* This technology has wide applicable range. Such as Sulfuric acid tail gas, smelting tail gas, boiler tail gas, coking tail gas, or other sulfur dioxide containing tail gas, can be treated by this technology.

Circulating absorption method for extracting sulfur dioxide from flue gas

Technology introduction

Lead the industrial gas into absorption tower, use organic sulfur removal agent to selective absorption of sulfur dioxide from the tail gas, the sulfur dioxide is removal from the tail gas. After absorbed sulfur dioxide, the organic sulfur removal agent is lead into desorption tower and is indirect heating by steam, the sulfur dioxide is desorbed from the organic sulfur removal agent. After desorption, the organic sulfur removal agent is lead into absorption tower for circulating use and realize circulating absorption. The desorbed sulfur dioxide gas through drying, compression and liquefaction, became liquid sulfur dioxide product for sale.

Reaction equation:

SO₂﹢H₂O = H₂SO₃

H₂SO₃﹢RN = RN.H₂SO₃

RN.H₂SO₃﹢Heat = RN + SO₂(g) +H2O

Technology advantage

* The technology is suitable for high concentration SO₂ flue gas desulfurization, the suitable flue gas SO₂ concentration range: 0.01% ~ 8%. The higher SO₂ concentration, the more obvious economic benefits.

* The 99.9% (dry base) liquid sulfur dioxide by-product can be obtained during SO₂ removing.

* The desulfurization efficiency can be adjusted flexibly in the range of 95~99.5%.

* Low running cost, the main energy consumption is lower pressure steam (0.3 ~ 0.5MPa).

* No secondary pollution.

* The organic sulfur removal agent adopts the macromolecular solution which molecular weight is about 10 thousand. it has advantages of low volatilization, stable chemical structure, no toxicity, and low loss. The annual supplement is less than 10%.

* Have the advantages of small occupation area, flexible operation, convenient operation, and low maintenance cost.