In the field of industrial solid and hazardous waste disposal, traditional incineration equipment often faces challenges such as incomplete pollutant decomposition, high energy consumption, and a high risk of secondary pollution. Specialized rotary kilns for solid and hazardous waste (including the core hazardous waste rotary kiln technology) are designed specifically for solid and hazardous waste disposal, focusing on "complete harmlessness at high temperatures + intelligent and precise temperature control + resource recycling." They efficiently destroy organic pollutants, solidify heavy metals, and recover heat during the disposal process, making them a key piece of equipment in the environmentally friendly disposal sector.
I. Core Technologies: Laying the Foundation for Efficient Disposal and Environmental Compliance
As a professional disposal equipment, this equipment utilizes three core technologies to overcome traditional disposal bottlenecks, ensuring "harmless disposal, low energy consumption, and minimal pollution":
1. High-Temperature Stratified Temperature Control for Harmless Disposal Technology
Precise Temperature Gradient Design: The kiln is divided into a drying and preheating section (300-600°C), a pyrolysis and gasification section (800-1000°C), and a high-temperature oxidation section (1200-1400°C). Temperatures are adjusted for different waste types. Organic hazardous waste (such as resin residue and waste paint) remains in the high-temperature oxidation section for ≥2 seconds, ensuring a dioxin removal rate of ≥99.9%. Heavy metals (such as lead and cadmium) melt at temperatures above 1200°C and solidify with the waste residue. Subsequent stabilization treatment allows for standard disposal. Heat-Resistant Structural Support: The kiln lining utilizes "high-alumina refractory bricks + silicon carbide coating" (customized exclusively for Rotary Kiln Refractories). It can withstand prolonged temperatures exceeding 1500°C and resist corrosion from acidic substances (such as chlorine and sulfur) in hazardous waste, extending the kiln's service life to 3-5 years.
2. Heat Recovery and Resource Recycling Technology
Flue Gas Waste Heat Cascade Utilization: Equipped with a "vertical preheater for rotary kilns" and a waste heat boiler, the high-temperature flue gas (1000-1200°C) discharged from the kiln exhaust is first used to preheat the waste to be disposed of (raising the waste temperature from ambient temperature to over 500°C, reducing heating energy consumption in the main kiln). The waste heat boiler then generates steam for plant heating or to drive generators, completing a "treatment heat release - heat recovery - secondary utilization" cycle. This achieves over 35% energy savings compared to traditional incineration equipment. Waste Residue Resource Utilization Potential: For general industrial solid waste that does not contain heavy metals (such as construction material residue and waste plastics), the inert residue generated after disposal can be used as aggregate for building materials (such as brick making and road paving) after testing and meeting standards, achieving an upgrade from "reduction" to "resource utilization."
3. Intelligent Leakage Prevention and Flue Gas Purification Technology
Fully Sealed and Leak-Proof Design: The feed inlet utilizes a "double-seal gate valve + nitrogen protection" structure to prevent the leakage of harmful gases during the disposal process. A "flexible sealing gasket" is installed at the connection between the kiln body and the supporting roller to reduce flue gas escape and ensure a safe workshop environment.
Flue gas deep purification system: A post-installed "deacidification tower (removes HCl and SO₂) + activated carbon adsorption tower (adsorbs dioxins and heavy metals) + bag filter (removes dust) + selective non-catalytic denitrification (SNCR)" system ensures flue gas emission indicators (such as particulate matter ≤ 20mg/m³, nitrogen oxides ≤ 200mg/m³) fully meet national standards, eliminating the risk of secondary pollution.
II. Application Scenarios: Covering All Types of Solid and Hazardous Waste Disposal Needs
The equipment offers customized treatment solutions based on different waste characteristics, adapting to the disposal needs of various sectors, including industry, chemical industry, and pharmaceuticals. Specific scenarios are categorized into two types:
1. Solid Waste Disposal
General Industrial Solid Waste: Treatment of waste residues from the building materials industry (such as cement kiln dust and ceramic waste) and light industrial waste (such as waste rubber, waste plastic, and waste paper residue). Pyrolysis and gasification are used to convert organic components into combustible gases, assisting in kiln temperature increase. Inert waste residues are recycled as auxiliary building materials. Disposal capacity can be customized to 5-50 tons/day.
2. Hazardous Waste Disposal (Core Application of the Hazardous Waste Rotary Kiln)
Organic Hazardous Waste: Treatment of pharmaceutical waste residues, chemical industry solvent waste (such as methanol residue and paint waste), and electronics industry waste circuit boards (requiring crushing and sorting). High temperatures destroy organic pollutants, solidifying heavy metals with the waste residue.
Inorganic hazardous waste: Treatment of waste residue containing heavy metals (such as electroplating sludge and smelting waste) and waste catalysts (such as chemical waste catalysts)—High temperatures exceeding 1200°C melt the heavy metals, forming a stable vitreous structure with the waste residue. Subsequent solidification/stabilization treatment allows for safe landfill or resource recovery.
3. Project Adaptation Options
New disposal centers: Provide full-process equipment from "pretreatment - disposal - flue gas purification - waste residue post-treatment." Customizable single-line production capacities range from 5 to 100 tons/day, meeting the needs of small and medium-sized enterprises to regional disposal centers.
Traditional Equipment Upgrade: Existing conventional incinerators can be upgraded to "dedicated rotary kilns for solid and hazardous waste." By replacing the core kiln, adding a preheater, and adding a deep purification system, the upgrade increases disposal efficiency by 40% and brings pollutant emissions into compliance.
III. Operational Logic: Breaking Down the "Pretreatment - Disposal - Post-Processing" Process
Equipment operation adheres to the principles of "safe disposal, precise temperature control, and environmental compliance." The entire process is divided into five major stages, each monitored by an intelligent system:
1. Waste Pretreatment: Ensuring safe and efficient disposal
Sorting and Testing: Waste components are first tested (e.g., chlorine content, calorific value, and heavy metal content) and then sorted and mixed according to "compatibility guidelines" to avoid risks such as explosions and corrosion during disposal.
Crushing and Conveying: Lumpy waste (e.g., used paint cans, large waste residues) is crushed to a particle size of ≤50mm and transported to the raw material silo via a sealed belt conveyor (leak-proof). Waste with excessive moisture content (e.g., food waste) is first dehydrated in a dryer (reducing the moisture content to ≤30%).
2. Preheating and Feeding: Reducing Main Kiln Energy Consumption
The pretreated waste enters the "Vertical Preheater for Rotary Kiln," where it undergoes countercurrent heat exchange with the high-temperature flue gas at the kiln outlet, raising the temperature from ambient temperature to 500-600°C. This completes initial drying and pyrolysis, and the waste then enters the main kiln through a sealed feed valve.
3. In-Kiln Disposal: Layered Temperature Control for Harmless Disposal
Kiln Drive and Temperature Control: The main kiln is tilted (3%-5%), supported by support rollers and driven by a gear ring (adjustable speed of 0.2-1.5 rpm). The waste moves axially with the kiln, passing through the drying and preheating section, pyrolysis and gasification section, and high-temperature oxidation section.
Burner Coordinated Temperature Control: Rotary kiln burners (specialized high-temperature burners) are installed at the kiln head and automatically adjust the fuel supply (natural gas, diesel, or pyrolysis gas) based on the calorific value of the waste. For high-calorific-value waste (such as waste plastics), external fuel can be reduced; for low-calorific-value waste (such as wet sludge), additional fuel is added to maintain high temperatures, ensuring stable and standard temperatures in each section.
4. Flue Gas and Waste Residue Post-Treatment: Ensuring Environmental Protection and Resource Recovery
Flue Gas Treatment: Flue gas from the preheater enters a "deep purification system" for deacidification, adsorption, dust removal, and denitrification. It is then discharged after online monitoring and meets standards.
Waste Residue Disposal: The treated waste residue is discharged from the kiln tail and cooled in a cooler to below 100°C. If the waste residue is inert (such as general industrial solid waste after disposal), it is tested and recycled as building material after meeting standards. If the waste residue contains heavy metals, it is sent to a stabilization workshop, where a curing agent (such as cement or chelating agent) is added for treatment. Once it meets standards, it is safely landfilled.
IV. Service Guarantee: A Professional Team Ensures Full-Cycle Disposal
As a rotary kiln manufacturer deeply engaged in environmentally friendly waste disposal, we provide a full-cycle service from solution design to operational support, alleviating our customers' worries:
1. Customized Solution Design
Based on the customer's waste disposal type, production capacity requirements, and local environmental standards, we develop a customized solution including equipment layout, process flow diagrams (rotary kiln diagrams), and environmental compliance calculations. If necessary, we provide pilot and test trials to verify the treatment results.
2. Full-Process Installation and Commissioning
We arrange for professional engineers to install the equipment on-site, ensuring precise assembly of the kiln body, sealing system, and flue gas purification system. Following commissioning, we conduct a 72-hour continuous test run to optimize parameters such as temperature control and feed rate to ensure stable and standard-compliant operation.
3. Long-term Operation and Technical Support
We provide 24/7 after-sales service, regularly inspecting rotary kiln refractories (kiln lining) wear, burner performance, and flue gas purification system efficiency, and promptly replacing wearing parts.
This rotary kiln, designed specifically for solid and hazardous waste, is not only a "pollutant terminator" but also a "promoter of resource recycling"—it solves the challenges of industrial waste disposal while creating added value through heat recovery and waste slag resource utilization. If you require information on process parameters for specific waste types (such as electroplating sludge or waste resin), equipment return on investment (ROI), or would like to receive references from similar projects, please feel free to contact us. We will provide tailored technical solutions and implementation support.
Solid Waste and Hazardous Waste Rotary Kiln Equipment Parameters:
| Specifications (m) | Processing capacity (10,000 tons per year) | Slope (%) | Equipment speed (r/min) | Motor power (KW) | |
| φ2.2X11 | 1 | 2 | 0.1-2.2 | 22 | |
| φ2.6X13 | 1.5 | 2 | 0.1-2.2 | 30 | |
| φ2.8X16 | 2.5 | 2 | 0.1-2.2 | 37 | |
| φ3.0X18 | 4 | 2 | 0.1-2.2 | 55 |
