Application: Sulfur Recovery Unit
Capacity: 3,000 TPA
Transformation technology: Two-Stage CLAUS + Selective Hydrogenation + Selective Oxidation
Recently, the 3,000 tons per annum (TPA) sulfur recovery unit of Hebi Hengli Rubber & Plastic Co., Ltd. achieved a major milestone—one-time successful feeding and production of qualified liquid sulfur. All performance indicators met the design targets, marking another successful industrial application of Luoyang Ruichang Environmental Engineering Co., Ltd.’s “Two-Stage CLAUS + Selective Hydrogenation + Selective Oxidation” process route in the fine chemical industry.
Project Background
With the continuous tightening of environmental regulations in China and worldwide, the control and recycling of sulfur compounds have become critical issues for the petrochemical and fine chemical industries. Sulfur-containing gases, if not effectively treated, can cause serious air pollution and equipment corrosion. Therefore, sulfur recovery systems are not only essential for environmental protection but also for enhancing enterprise efficiency and sustainable operation.
Hebi Hengli Rubber & Plastic Co., Ltd., a leading enterprise in the rubber and plastic additives sector, generates sulfur-containing waste gases during its production processes. In order to meet the latest environmental emission standards and achieve green and efficient production, the company decided to build a 3,000 TPA sulfur recovery system. After comprehensive technical comparison and evaluation, Luoyang Ruichang Environmental Engineering Co., Ltd. was chosen as the process technology and equipment supplier, relying on its solid engineering background and excellent market reputation.
Project Details
For this project, Luoyang Ruichang undertook the process package and detailed design, as well as provided complete sets of core equipment, patented catalysts, and key instruments. The adopted process route—“CLAUS + Selective Hydrogenation + Selective Oxidation (two-stage)”—represents one of the most efficient and stable sulfur recovery technologies currently available in the industry.
- CLAUS Section: Converts hydrogen sulfide (H₂S) in the acid gas into elemental sulfur through thermal and catalytic reactions, achieving the initial stage of sulfur recovery.
- Selective Hydrogenation Section: Converts remaining sulfur dioxide (SO₂) and other oxidized sulfur compounds into H₂S to further enhance the conversion efficiency.
- Selective Oxidation Section: The residual H₂S is oxidized into elemental sulfur under mild conditions, ensuring the total sulfur recovery rate exceeds 99%.
This process design not only ensures high recovery efficiency but also minimizes energy consumption and operational cost. The use of Ruichang’s proprietary catalysts and precision-engineered equipment provides outstanding performance in reaction stability, resistance to catalyst poisoning, and prolonged service life.
During the commissioning phase, engineers from Luoyang Ruichang worked closely with Hengli’s operation and startup team. Through rigorous technical coordination, parameter optimization, and on-site guidance, the team ensured a smooth startup and successful continuous operation of the sulfur recovery unit. The production of qualified liquid sulfur in the first feed-in trial fully validated the reliability and advancement of Ruichang’s process technology.
Project Outcome and Significance
The successful commissioning of the Hengli project once again demonstrates Ruichang Environmental Engineering’s strong technical expertise and rich project experience in sulfur recovery system design and implementation. It also marks a significant step forward in applying the company’s technology in the fine chemical sector, following numerous successful applications in the petroleum refining and coal chemical industries.
Through this project, Hebi Hengli Rubber & Plastic Co., Ltd. has achieved:
- Full compliance with national environmental protection standards;
- Reduction of sulfur emissions and secondary pollution;
- Recovery and reuse of sulfur resources, improving overall economic benefits.
For Luoyang Ruichang, this project not only enriches its application portfolio in sulfur recovery engineering but also consolidates its position as a leading environmental equipment manufacturer and process solution provider in China’s sulfur recovery industry.
About Luoyang Ruichang Environmental Engineering Co., Ltd.
As a professional environmental equipment manufacturer, Luoyang Ruichang focuses on the R&D, design, and manufacturing of sulfur recovery systems, tail gas treatment units, and related environmental protection technologies. The company’s CLAUS + Selective Hydrogenation + Selective Oxidation two-stage process has been widely recognized for its high efficiency, stability, and reliability, with total sulfur recovery rates exceeding 99%.
With decades of engineering experience and a comprehensive service system—from process design and equipment manufacturing to installation guidance and after-sales support—Luoyang Ruichang continues to deliver high-quality environmental solutions to clients across the refining, petrochemical, and fine chemical industries.
