Recently, CADAIR, a professional manufacturer of Volatile Organic Compounds treatment for the petroleum refining industry, has successfully completed a tailor-made organic waste gas treatment project for the sewage treatment plant of a leading petroleum refining enterprise in Liaoyang, and the project has passed the acceptance inspection smoothly. All pollutant emission indicators after treatment are superior to the relevant requirements of the Emission Standard of Pollutants for Petroleum Refining Industry (GB 31570-2015) and the Emission Standard of Pollutants for Petroleum Chemistry Industry (GB 31571-2015). Among them, the emission concentration of non-methane total hydrocarbons (NMHC) is controlled below 60mg/m³, with a removal efficiency of over 99%, providing a replicable technical model for VOCs treatment in the petroleum refining industry.
Customer Focus: Environmental Upgrade Demands of Petroleum Refining Enterprises
In the petrochemical industry system, the refining sewage treatment link is a key control node for VOCs and odor pollution. As a backbone enterprise in the regional refining industry, this petroleum refining enterprise in Liaoyang operates a sewage treatment plant responsible for treating oily wastewater across the whole plant. A large amount of organic waste gas is volatilized from treatment units such as regulation, oil separation, air flotation and biochemical treatment, which has become a key bottleneck for the enterprise to achieve green and compliant production.
As a professional enterprise deeply rooted in the refining field, this petroleum refining enterprise has always adhered to the green development concept. It urgently needs a waste gas treatment scheme that adapts to its own working conditions, is stable, reliable, economical and efficient, so as to break the environmental protection bottleneck, realize compliant production, and demonstrate the enterprise’s environmental responsibility and industry benchmark image.
CADAIR, a professional organic waste gas treatment manufacturer, has become the enterprise’s strategic partner by virtue of its profound industrial waste gas treatment experience, customized technical strength and rich successful cases. The two sides jointly promote the construction and implementation of the waste gas treatment system, helping the enterprise build a new environmental protection benchmark in the refining industry.
Challenges in Waste Gas Treatment of Refining Sewage Stations: Severe Tests Under Complex Working Conditions
The waste gas of this petroleum refining sewage treatment plant comes from the volatilization of each treatment unit, with complex working conditions and prominent treatment difficulties. The specific challenges are as follows:
1. Complex components: It contains a variety of pollutants such as non-methane total hydrocarbons, benzene series, hydrogen sulfide, ammonia, etc., and the components change dynamically with the working conditions of upstream units, making it difficult for a single treatment technology to achieve full coverage.
2. Large concentration fluctuation: The inlet VOCs concentration fluctuates irregularly between hundreds and thousands of mg/m³, putting forward high requirements for the impact resistance of the system.
3. Large air volume and strong odor: The designed air volume reaches 30,000m³/h, and odor substances have a significant impact on the surrounding environment. The treatment process needs to balance treatment efficiency, odor removal effect and long-term operation economy.
Conventional treatment methods such as single adsorption and direct combustion cannot adapt to the above complex working conditions and meet the dual control requirements. Therefore, a customized, efficient and stable comprehensive treatment scheme is urgently needed.
Customized Solution: Synergistic “Absorption + Oxidation” to Precisely Solve Treatment Problems
In view of the particularity of organic waste gas from this refining sewage treatment plant, CADAIR, a professional organic waste gas treatment manufacturer for petroleum refining sewage plants, has customized a combined “Absorption + Oxidation” treatment process. NaOH solution is used as the absorbent, and a three-bed regenerative thermal oxidizer (RTO) is selected for oxidation technology, realizing efficient purification and stable compliance of waste gas.
Specific Treatment Process
The waste gas first enters the caustic washing tower to remove odor components, then passes through two-stage demisting to reduce humidity before entering the RTO unit. Under the high temperature of 760-850℃, organic components are completely decomposed into CO₂ and H₂O. The purified gas is discharged up to standard, with the removal efficiency stably maintained at over 99%, which fully adapts to the needs of complex working conditions.
Stable Operation: Passed Acceptance and Demonstrated Technical Strength
After the project was put into operation, tested by a third-party authoritative testing institution, the emission concentration of non-methane total hydrocarbons in the treated waste gas is ≤60mg/m³, and the removal efficiency reaches over 99%. It strictly complies with the relevant requirements of the Emission Standard of Pollutants for Petroleum Refining Industry (GB 31570-2015) and the Emission Standard of Pollutants for Petroleum Chemistry Industry (GB 31571-2015), realizing long-term stable up-to-standard discharge of waste gas and completely solving the organic waste gas treatment problem of this refining sewage treatment plant.
Project Significance
The successful implementation of this project not only helps this petroleum refining enterprise achieve environmental compliance upgrade, but also provides replicable and promotable practical experience for VOCs treatment of similar refining sewage treatment plants in China, boosting the high-quality green development of the refining industry.
As the refining industry empowers economic development, CADAIR, a professional Volatile Organic Compounds （VOCs）treatment manufacturer for the petroleum refining industry, is guarding the ecological environment with professional environmental protection technology. We always adhere to the concept of pragmatism and innovation, and are committed to providing scientific, green and sustainable environmental solutions for global industrial enterprises, helping more enterprises achieve environmental upgrade and high-quality development.
