CADAIR VOCs Treatment Solutions: Efficient, Economical and Stable Comprehensive Solutions for the Adhesives Industry

I. Industry Pain Points and Core Technology Routes

As a key segment of the fine chemical sector, the adhesives and sealants industry generates complex VOCs (Volatile Organic Compounds) emissions from core processes including production, coating and drying. Against the backdrop of tightening environmental regulations and rising demand for green manufacturing, traditional treatment technologies often fail to adapt to industry-specific conditions, bringing four major challenges to enterprises:

• Exhaust gas contains various solvents such as benzene series, esters and ketones with distinct physical and chemical properties, placing high requirements on the versatility of treatment technologies.
• Processes like coating and workshop general ventilation mostly feature large air volume and low concentration, leading to extremely high investment and operation costs if direct combustion is applied.
• Exhaust gas with reactive monomers such as acrylates easily causes polymer clogging in adsorption media, resulting in sharp efficiency drops, soaring consumable costs and potential fire safety hazards.
• It is difficult to strike a balance between operation cost and stable compliance performance.

To address these pain points, CADAIR takes the concentration-air volume matrix as the core logic for process selection, provides customized technology combinations, and forms four mature technical paths:

1. Adsorption and Recovery Route Adopting the K-FILTER activated carbon fiber adsorption and recovery unit, this route applies to high-concentration exhaust gas with relatively single components and high recovery value. It delivers a purification efficiency of over 95%, and the recovered solvents can be directly reused in production to create economic benefits.
2. Destruction Technology Route With RTO (Regenerative Thermal Oxidizer) and RCO (Regenerative Catalytic Oxidizer) as core equipment, RTO achieves a purification efficiency of over 98% and a heat recovery efficiency above 95%. When the exhaust gas concentration reaches the thermal equilibrium point, auxiliary fuel consumption can be greatly reduced or even eliminated.
3. Concentration + Combustion Combined Route The zeolite rotor + RTO/CO solution is the mainstream choice for the industry. With a concentration ratio of 5 to 40 times and an adsorption efficiency of 90% to 95%, the zeolite rotor significantly reduces the scale of downstream combustion units, cutting down investment and operation energy consumption.
4. Innovative Internal Circulation + RTO Route This solution eliminates the adsorption and concentration process. By circulating part of the purified high-temperature gas back to the inlet to raise the incoming concentration, the exhaust gas is directly sent to RTO for high-temperature destruction. It thoroughly solves the polymer clogging problem with outstanding safety and economy, and has been successfully verified in the 3C coating industry.

CADAIR’s core technical strength has gained authoritative recognition. Its drum-type zeolite rotor concentration technology and equipment is included in the Catalogue of Major National Encouraged Environmental Protection Technology and Equipment (2020 Edition). The company has also participated in the formulation of multiple industry standards such as Technical Requirements for Zeolite Adsorption and Concentration Devices, with R&D personnel accounting for more than 30% of the total workforce.

II. Typical Cases and Stable Compliance Capability

CADAIR’s proven practices in chemical, fine chemical and other industries provide highly referential models for the adhesives sector:

1. Shanxi Lu’an Chemical Technology Coal Chemical Project For high-concentration, large-volume exhaust gas with complex components, the three-tower RCO process is adopted, treating 80,000 m³/h of air with a stable purification efficiency of 98%. Its low-temperature reaction feature effectively suppresses the generation of thermal NOx.
2. Rianlon Corporation Polymer Materials Project For exhaust gas containing complex components such as toluene and dichloromethane, a combined process of pretreatment + three-bed RTO is applied, treating 35,000 m³/h of air. With a heat recovery efficiency above 95% and a purification efficiency over 99%, the system ensures long-term stable operation.
3. Zhuhai Sapici Chemical Co., Ltd. Project For exhaust gas containing polyurethane raw materials such as TDI and benzene series, the three-bed RTO process is adopted, treating 4,000 m³/h of air. The high-temperature environment thoroughly oxidizes pollutants, and the complete safety interlock system ensures reliable operation, with outlet concentration outperforming Guangdong provincial local standards.
4. Greatech 3C Coating Line Innovative Application For exhaust gas containing easily polymerizable acrylate monomers, the internal circulation + RTO process is adopted. Field measurements show an inlet concentration of 1948–2632 mg/m³ and an outlet concentration of only 16.3–35.6 mg/m³, with no clogging failures during long-term operation.

CADAIR’s reliable compliance performance stems from high-performance core equipment, precise process matching, design specifications benchmarked against the highest industry standards, and over 1,300 sets of cross-industry application experience, enabling rapid adaptation to various working conditions in the adhesives industry.

III. Full Lifecycle Closed-Loop Service System

CADAIR has built a full lifecycle closed-loop service system covering diagnosis, design, manufacturing, installation and operation & maintenance, to ensure solution implementation and long-term stable operation:

1. Precise Diagnosis First Core parameters including air volume, components, concentration, temperature and humidity are collected on site. Meanwhile, LEL (Lower Explosive Limit) calculation and hazardous substance identification are carried out to ensure solution compliance and intrinsic safety from the source.
2. Customized Process Design Mature technology modules are flexibly combined based on the concentration-air volume matrix, with a six-layer in-depth safety defense system embedded. Core components are independently manufactured in three production bases under strict quality control to guarantee equipment quality.
3. Standardized Project Delivery Standardized construction and commissioning procedures are strictly implemented. No less than 6 hours of system operation training is provided to complete knowledge transfer and ensure customers have independent operation and maintenance capabilities.
4. Intelligent Proactive Operation and Maintenance Based on the IoT cloud platform, three-way connectivity of equipment, customers and services is realized, supporting remote monitoring and fault early warning. It shifts from reactive repair to predictive maintenance, and a multi-level response mechanism ensures rapid problem handling.
5. Long-Term Value Guarantee After-sales response is guaranteed within 2 hours on call and on-site service within 8 hours. Free routine inspections are provided every six months during the warranty period, with lifelong technical support and original spare parts supply at preferential prices. Taking the internal circulation + RTO solution as an example, it saves about 183,000 yuan in annual consumable costs.

IV. Dual Value of Cost-Effectiveness and Compliance

Economic Benefits: From Cost Burden to Value Creation

1. Significant Energy Consumption Reduction Compared with the traditional zeolite rotor + RTO solution, the internal circulation + RTO process cuts annual energy operation costs by 57%. AI intelligent energy-saving retrofit can reduce annual operation expenses by 15%–50% with an investment payback period of only 2–3 years. The low-temperature zeolite rotor reduces energy consumption by about 40% compared with conventional models.
2. Greatly Reduced Consumable Costs Combustion-based processes require no adsorption consumables. The annual consumable cost of the internal circulation + RTO solution is only 13,000 yuan, far lower than 196,000 yuan per year for traditional solutions.
3. Resource Recovery and Value Addition High-value solvent exhaust gas can be recycled through adsorption recovery, and waste heat can be recovered for production processes to create additional economic benefits.

Compliance Guarantee: All-Round Stable Emission Compliance

CADAIR solutions can stably meet national standards such as Emission Standard of Air Pollutants for Coating, Ink and Adhesive Industry (GB 37824-2019), adapt to strict local limits in regions like Beijing and Guangdong, and also comply with international environmental regulations including the US Clean Air Act, EU Solvent Directive and Japanese Air Pollution Control Act. Backed by national catalog recognition and participation in industry standard formulation, CADAIR has delivered numerous projects that passed third-party acceptance and run stably for a long time, providing solid compliance support for enterprises.

For the adhesives industry, CADAIR provides not a single piece of treatment equipment, but an integrated comprehensive solution integrating technology, service and compliance. While ensuring long-term stable emission compliance, it helps enterprises achieve a win-win outcome of environmental benefits and economic returns.