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Carbonization
Resource Recycling—Carbonization Technology
In this technology, various organic solid wastes—including biomass and municipal solid waste—can be carbonized to the greatest extent possible. Compared with conventional technologies, this process addresses key challenges faced by traditional pyrolysis and gasification technologies, such as their inability to operate at large scales, high equipment failure rates, and poor equipment safety. As a result, this technology offers high operational stability, low running costs, eliminates the need for waste sorting and separation, enables fully automated end-of-pipe resource recovery (precise and automatic separation of char powder from inorganic recyclable materials), and produces significantly fewer environmentally harmful pollutant emissions.
Reaction principle
Characteristics of Carbonization Technology
Waste and garbage do not need to be pre-sorted or categorized.
Raw domestic waste can be directly fed into the system without requiring extensive manual sorting and classification, and it has an extremely low calorific value.
No auxiliary fuel needs to be added during the disposal process.
The disposal process achieves waste carbonization solely based on the waste's own calorific value, without the need to add auxiliary fuels such as coal or natural gas.
The disposal products can achieve 100% resource utilization.
The disposal products are 100% recyclable: Organic waste is carbonized to produce charcoal powder and combustible gas. The charcoal powder can be used as an industrial raw material, as an energy source, or for agricultural purposes such as soil improvement; the combustible gas powers equipment, and any excess heat can be reused. Inorganic waste does not undergo any chemical reactions within the carbonization machine and is intelligently sorted into metals, glass products, and sand and gravel materials.
Emissions easily meet environmental standards.
The carbonization reaction is carried out in an oxygen-free environment, producing very few harmful and toxic substances. The dioxin content is one-tenth or even lower than that of conventional waste incineration, enabling compliance with environmental standards at extremely low costs.
Better system stability, Higher security.
The project cases include biomass carbonization and municipal solid waste carbonization, both of which have been operating stably for long periods, processing tens of thousands of tons and accumulating extensive experience in stable operation. Meanwhile, this technical solution boasts even greater system stability and enhanced safety, and has already processed hundreds of thousands of tons of biomass cumulatively. Currently, this technical solution is the only one—both domestically and internationally—that can achieve large-scale, continuous, and stable engineering operation, making it highly irreplaceable.
Characteristics of Carbonization Technology Processes
• Organic solid waste low-temperature carbonization technology equipment precisely divides the complete incineration process—originally carried out in a single furnace—into three distinct reactions (drying + pyrolysis + combustion), each taking place in separate reactors. Since solid materials do not participate in the combustion itself, only the combustible gases generated during the carbonization of organic solid waste are burned, thereby achieving both high efficiency and environmental friendliness.
Carbonization
Energy Reuse—Preheating Decarbonization Technology
Main application areas
Decarbonization treatment of gasifier slag, decarbonization and recycling of coal gangue, limestone calcination, cement raw material calcination, calcination of low-grade iron ore, and hazardous waste calcination.
Core technology
It employs a self-developed oxygen-free thermal decarbonization technology, whose core technological process involves first carrying out a reduction reaction and then proceeding with combustion-based decarbonization.
Processed product
After decarbonization, the resulting products can be reused as high-value construction materials and utilized as raw materials for construction materials, such as concrete aggregates, unburned bricks, permeable bricks, aerated concrete blocks, ceramic aggregates, and other similar materials. They can also be used in industries like soil conditioners.
Preheating Decarbonization Technology Process
Process Flow: After coarse crushing, coal gangue is fed into the pyrolysis main unit. The interior cavity of the unit is completely oxygen-free, where the material undergoes pyrolysis. The pyrolyzed coal gangue, along with the pyrolysis oil and gas, then enters an external combustion furnace, where it reacts with air to initiate decarbonization. During the decarbonization process, a large volume of high-temperature flue gas is generated. This high-temperature flue gas is directed to a waste heat steam boiler, producing abundant steam. The steam can be used for heating or power generation and can also be further utilized—for instance, in hydrogen production. Meanwhile, the medium-temperature flue gas discharged from the steam boiler provides the energy required by the pyrolysis main unit. The low-temperature flue gas undergoes tail-gas treatment before being safely discharged in compliance with emission standards. As a result, ultra-low-calorie coal gangue can achieve stable ignition, efficient combustion, and meet emission standards for pollutants such as NOx—without requiring any co-firing.
Characteristics of Preheating Decarbonization Technology
I. Outstanding energy-saving and consumption-reducing effects of equipment:
1. No need for grinding process: Reduces equipment footprint, lowers equipment investment, and saves operating costs.
2. No external energy source required; no need for co-firing: As long as the calorific value of the material exceeds 800 kcal/kg, the system can achieve its own thermal balance and operate stably.
3. Outstanding energy-saving performance: By utilizing flue gas waste heat to preheat and increase the enthalpy of the material, this approach significantly improves energy efficiency compared to the circulating fluidized bed boiler method.
II. Emissions meet standards and deliver significant environmental benefits:
1. Compliance with emission standards: Multi-stage combustion, coupled with temperature control, enables low-nitrogen combustion, directly achieving compliance with NOx emission standards during the combustion process. The exhaust gas emissions (at the original concentration before treatment) are significantly lower than those from conventional circulating fluidized beds.
2. Flexible temperature control: Multi-stage isothermal combustion enables controllable temperature ranges.
3. Significant carbon reduction effect: Since the equipment does not require an external heat source and relies solely on the calorific value of the solid waste itself, it does not consume any carbon emission quotas.
III. Superior Economic Benefits:
1. Low hardware and installation costs: The equipment adopts a horizontal structural layout, eliminating the need for extensive steel framework. Compared to conventional boiler and kiln layouts, its hardware, installation, and construction costs are significantly reduced.
2. The anaerobic pyrolysis equipment boasts high efficiency: it features a large single-machine processing capacity, enabling rapid and high-volume disposal of coal gangue, thereby effectively addressing local coal gangue challenges within a limited timeframe—quick results in a short period.
3. High value-added products: Since coal gangue does not require grinding, the product obtained after decarbonization can be recycled into high-value-added products. Various products can be processed based on the specific characteristics of local coal gangue.
4. Waste Heat Utilization from Equipment: The anaerobic pyrolysis process generates substantial waste heat, which can be utilized for power generation. Waste heat boilers can be used to produce steam and supply it to surrounding areas; in northern regions, this steam can also be used for district heating to provide warmth to nearby residents.
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