Amidst surging demand for industrial solid waste disposal and tightening environmental protection policies, hazardous waste (such as chemical waste residue, medical waste, and waste paint) contains heavy metals and toxic organic compounds, requiring efficient, compliant incineration equipment for harmless treatment and volume reduction. Hazardous waste rotary kiln incineration equipment, with its core advantages of "high-temperature, thorough incineration and standard-compliant flue gas emissions," has become a core component of hazardous waste disposal projects. The following analysis focuses on the equipment's features, technical highlights, applicable scenarios, and service guarantees. I. Core Functions of the Equipment: Addressing Three Pain Points in Hazardous Waste Treatment
Hazardous waste treatment often faces three major pain points: "incomplete decontamination," "excessive flue gas pollutants," and "unstable treatment capacity." The rotary kiln incineration equipment, through targeted design, achieves full process control:
Complete decontamination: Utilizing a dual-stage "rotary kiln + secondary combustion chamber" incineration process, the rotary kiln maintains a stable temperature of 850-1100°C, enabling the initial decomposition of organic pollutants (such as VOCs and PCBs) in hazardous waste. The secondary combustion chamber temperature is raised to above 1100°C, with a flue gas residence time of ≥2 seconds, ensuring a Destruction Removal Efficiency (DRE) of ≥99.99% for organic pollutants. Heavy metals (such as lead and mercury) solidify or vaporize at high temperatures before entering the subsequent treatment system, preventing secondary contamination. Flue Gas Emission Compliance: The flue gas purification system, which includes a quenching tower, semi-dry deacidification, activated carbon adsorption, bag filter, and selective catalytic reduction (SCR), efficiently removes acidic gases (such as HCl and SO₂), particulate matter, heavy metals, and dioxins from the flue gas. The system achieves a deacidification efficiency of ≥95%, a particulate matter emission concentration of ≤10mg/m³, and a dioxin emission concentration of ≤0.1ng TEQ/m³, fully complying with GB 18484-2020, "Hazardous Waste Incineration Pollution Control Standard." Flexible Adaptability: The equipment has a processing capacity of 5-50 tons/day, with various specifications available depending on the project scale (e.g., a Φ2.5m×4.5m rotary kiln is suitable for 5-8 tons/day, and a Φ4.0m×10m rotary kiln is suitable for 30-50 tons/day). It supports intermittent or continuous feeding and can process various hazardous waste forms, including solid, semi-solid, and liquid (such as barreled waste residue, paste sludge, and waste solvents), adapting to the characteristics of hazardous waste from various industries, including the chemical, pharmaceutical, and electronics industries.
II. Core Technology Advantages: Ensuring Stable and Efficient Equipment Operation
1. Rotary Kiln Structural Optimization Technology
Adjustable Kiln Tilt: The kiln tilt angle of 3-5° can be adjusted in real time via a hydraulic system. Combined with an adjustable rotation speed of 0.5-2 rpm, this ensures that the hazardous waste is fully agitated and evenly heated within the kiln, preventing localized coking and incomplete incineration. This is particularly suitable for semi-solid hazardous waste with high viscosity and high moisture content, such as chemical sludge. Layered Refractory Design: The kiln lining utilizes a double-layer structure of high-alumina bricks and lightweight insulating bricks. The inner layer of high-alumina bricks is heat-resistant (long-term resistance to 1200°C) and corrosion-resistant, while the outer layer of lightweight bricks offers excellent thermal insulation, lowering the kiln surface temperature (≤60°C) and reducing heat loss, resulting in 15-20% energy savings compared to traditional single-layer linings.
2. Intelligent Temperature Control and Feeding System
PLC fully automatic temperature control: Infrared thermometers monitor the rotary kiln and secondary combustion chamber temperatures in real time. Combined with data from an online flue gas analyzer, the system automatically adjusts the fuel/gas supply and combustion air ratio to ensure a stable combustion temperature within the set range, preventing incomplete pollutant decomposition due to temperature fluctuations. Multi-Form Feeding Adaptability: Equipped with a solid hopper (accommodating bagged and barreled hazardous waste), a liquid spray gun (accommodating waste solvents and waste oil), and a semi-solid screw conveyor (accommodating sludge and paste-like hazardous waste), the system can flexibly switch feeding methods based on the hazardous waste form. The feed rate is precisely controlled by a variable frequency motor to match the incineration load and avoid overload.
3. Integrated Ash and Wastewater Treatment
Ash Resource Utilization: Bottom ash generated by incineration (accounting for 10-20% of the total hazardous waste) is water-quenched and then sent to a solidification and stabilization system (such as cement curing). The solidified product has a compressive strength of ≥5MPa, meeting safe landfill acceptance standards. Fly ash (accounting for 5-10%) undergoes chelation treatment and is then synergistically solidified with the bottom ash, reducing hazardous waste volume while lowering disposal costs. Zero Wastewater Discharge: Water for equipment cooling and flue gas quenching is recycled through a circulation system, replenishing only evaporation losses. Flushing wastewater (such as workshop floor wash water) is treated in a "scaling tank + anaerobic + aerobic + MBR + RO" system before being reused in the cooling system, achieving zero wastewater discharge and preventing secondary pollution.
III. Applicable Scenarios: Covering the Hazardous Waste Disposal Needs of Multiple Industries
1. Industrial Hazardous Waste Disposal Center
For complex hazardous waste generated by the chemical, petrochemical, and pharmaceutical industries (such as chemical reaction residues, spent catalysts, and medical waste and pharmaceuticals), a large-scale rotary kiln incineration system with a 20-50 ton/day capacity, combined with a multi-component feed system and advanced flue gas purification system, can be used to meet the centralized disposal needs of regional hazardous waste. For example, a hazardous waste disposal center in a chemical park utilizes a Φ3.8m x 9m rotary kiln, processing an average of 35 tons of hazardous waste daily and meeting the hazardous waste disposal needs of over 20 enterprises within the park. 2. Enterprise-Builded Hazardous Waste Treatment Stations
Small and medium-sized chemical and electronics companies (such as circuit board manufacturers that generate waste etching solutions and resins containing heavy metals) can use small rotary kilns with a capacity of 5-10 tons/day to treat their own hazardous waste locally, avoiding the risk of leakage during transportation. These facilities also occupy a small area (approximately 1,500-2,000 square meters) and can be flexibly located within the company's factory. For example, one electronics factory uses a 2.8m x 5m rotary kiln that processes an average of 8 tons of hazardous waste daily, achieving "self-generation and self-disposal" of hazardous waste.
3. Emergency Hazardous Waste Disposal Projects
For sudden environmental incidents (such as hazardous waste leaks or surges in medical waste during epidemics), mobile hazardous waste rotary kiln incineration equipment (with a processing capacity of 2-5 tons/day) is available. This modular design allows for on-site transportation via container and installation and commissioning within 24 hours, enabling rapid response to emergency disposal needs. For example, during the epidemic, a mobile unit operated at a temporary medical waste disposal site, processing an average of 3 tons of medical waste daily, ensuring timely and harmless disposal of the waste.
IV. Compliance and Service Guarantee: Full-Life Cycle Support for Project Implementation
1. Compliance Design
Policy Compliance: The equipment is designed to fully comply with regulations such as the "Hazardous Waste Incineration Pollution Control Standard" and the "Technical Guidelines for Environmental Impact Assessment of Construction Projects - General Principles." We can assist clients in completing environmental impact assessments, safety assessments, and obtaining pollutant discharge permits to ensure project compliance.
2. Full-Life Service
Customized Solution: Our technical team conducts an on-site survey of the project site and, taking into account the hazardous waste type (e.g., composition and form), processing volume, and local environmental standards, develops a customized solution encompassing equipment selection, process layout, and environmental support. For example, for high-chlorine hazardous waste (e.g., waste chlorinated solvents), we optimize the secondary combustion chamber temperature and deacidification system to prevent dioxin formation.
Installation and Commissioning: Our professional installation team utilizes modular construction to shorten installation time (a 50-ton/day system can be installed in approximately 60-90 days). We remain on-site throughout the commissioning phase to optimize incineration parameters (e.g., rotation speed, temperature, and feed rate) to ensure the equipment meets the designed processing capacity and emission standards.
V. Equipment Value: Balancing Environmental Protection and Economic Benefits
Hazardous waste rotary kiln incineration equipment not only helps enterprises or disposal centers achieve harmless disposal and volume reduction (volume reduction rate ≥ 90%), but also enhances economic benefits through resource recovery. For example, the high-temperature flue gas generated during the incineration process can be used in a waste heat boiler to generate steam, driving a steam turbine generator for electricity generation (a 50-ton/day system generates approximately 1.2 million kWh annually) or providing heating for the factory, achieving energy recovery. If the solidified ash meets building material standards (e.g., heavy metal leaching concentration meets standards), it can be used as roadbed filler, further reducing disposal costs.
In summary, hazardous waste rotary kiln incineration equipment, with its core advantages of "high-temperature, thorough incineration + intelligent control + compliant emissions," has become a key solution for the harmless disposal of hazardous waste. Whether it's a centralized disposal center, an enterprise-built site, or an emergency project, we offer tailored solutions. Backed by a full-lifecycle service guarantee, we help customers achieve environmental compliance and sustainable development.
