WSA Wet-Process Sulfuric Acid Technology

Technical Developments
Sulfuric acid wet production technology
Development team
Production Equipment
Quality Control
Features of technology
Process Principle

Sulfuric acid wet production technology

Hunan Chenwei Environmental Engineering Co., Ltd. (Chenwei, Hunan Province) has its roots in the Changsha Chemical and Environmental Equipment Factory. In 2005, the company completed a restructuring process and has since developed into a specialized engineering contractor focused on comprehensive solutions for industrial emissions and the manufacture of chemical environmental equipment.

The company’s primary strategic development focus is on the resource recovery of industrial exhaust gases. It concentrates its efforts on the industrialization of wet sulfuric acid production using the WSA method, while also expanding into areas such as desulfurization and denitrification of industrial flue gas, treatment of highly concentrated organic wastewater, and the resource recovery of hazardous waste. The company offers comprehensive EPC (Engineering, Procurement, and Construction) general contracting services with full-cycle support—from project documentation development and equipment manufacturing to installation, commissioning, and after-sales technical maintenance.

One of China’s leading companies in the wet sulfuric acid production industry using the WSA method. Its key product, the WSA–Ⅲ type integrated equipment for wet sulfuric acid production, has achieved a breakthrough in industrial application. The independently developed high-efficiency low-temperature WSA method sulfuric acid production system boasts a conversion rate of 99.8%. It is capable of processing industrial exhaust gases containing sulfur from 0.5% to 15%, with a maximum daily capacity of 300,000 m³/h per unit. The concentration of the final product (sulfuric acid) remains consistently above 98%, while the concentration of harmful substances in the purified exhaust gas does not exceed 50 mg/Nm³, significantly exceeding national emission standards.

Currently, the company’s business spans multiple industries, including non-ferrous metallurgy, coal chemistry, petrochemicals, steel and coke production, as well as fine chemicals. Domestically, the company has completed over 60 major turnkey projects for wet sulfuric acid production using the WSA method, with a combined industrial exhaust gas treatment capacity exceeding 50 million m³/h. The annual recovered sulfuric acid volume has reached over 3 million tons, and sulfur dioxide emissions have been reduced by more than 2 million tons. Internationally, the company has expanded its presence in countries such as Zambia, Peru, Kazakhstan, and others.

For many consecutive years, the company has been honored with titles such as “State High-Tech Enterprise,” “Hunan Province Medium and Small Enterprise with Specialized, Precision, Unique, and Innovative Profile,” “AAA Credit Rating Enterprise,” and “Key Enterprise in Hunan Province’s Environmental Industry.”

The company’s headquarters is located in the Zhouzhu High-Tech Park in Zhuzhou City, at the heart of the Changsha–Zhuzhou–Tanzhou agglomeration. The area offers convenient transportation and well-developed production infrastructure, providing the enterprise with outstanding geographical advantages for business expansion and technological innovation.