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Multi-stage furnace sludge treatment system
The multi-stage furnace is constructed in a steel plate cylindrical furnace body with refractory materials as a fireplace, and is divided into several sections. Each hearth section is provided with a disposal outlet around and in the center of the hearth.
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Core technology
The multi-stage furnace is constructed in a steel plate cylindrical furnace body with refractory materials as the fireplace, and is divided into several sections. Each hearth section is equipped with a disposal outlet around and in the center of the hearth, and the disposal is mutually discharged from the outer side of the hearth to the inner side of the hearth and from the inner side of the hearth to the outer side of the hearth by the mixing teeth installed on the mixing arm of the central shaft running at a low speed (0.5-3rpm). The treatment and the combustion object are in complete convection contact through the discharge outlet, and the hollow central shaft and mixing arm set in the center of the furnace are forced by the cold air of the special shaft cooling truck.
Performance characteristics
1. The structure of multi-stage furnace is simple, strong, long service life, easy maintenance and repair.
2. The operation is simple, automatic, automatic control according to the automatic control system equipment, so the operation and management are easier.
3 High efficiency, low operating costs: due to the convection contact of combustion gas and combustion heat exchange, it becomes high efficiency, in addition to the need for less power, low operating costs.
4. Small installation area: Because it is a vertical device, only a small installation area is required.
5. According to the end use of the product, through the temperature control of each layer of furnace bed, flexible, flexible, "tailored" to manufacture different quality activated carbon products, precise control of the roasting of metallurgical metal concentrate, according to the end use of the product, through the temperature control of each layer of furnace bed.
6. Residence time of the material in the furnace: the residence time can be precisely controlled by adjusting the mechanical movement speed of the material on the furnace bed. The special requirements for the residence time of the material in each temperature zone can be realized, and the residence time in each hearth can be controlled.
Application field
    1. Carbonization (roasting)/steam activation processing and thermal regeneration of activated carbon in the manufacturing process of activated carbon.
    2. Roasting and calcining of concentrate, as well as roasting and calcining of metallurgical by-products; Roasting and calcining of carbonate of magnesium, calcium and manganese; Roasting and calcining of phosphate, kaolin, sulfate, molybdate, dolomite, etc.
    3. Pyrolytic-incineration treatment of industrial/domestic sludge.
Process flow
The residual sludge produced by industrial sewage treatment is used as raw material. After drying, the sludge is activated by adding activator. After drying, grinding, adding inert gas pyrolysis carbonization. Finally, after cooling, washing and drying, the activated carbon based on sludge was prepared. Using a large amount of residual sludge produced by industrial sewage treatment as raw material, the preparation of activated carbon from sludge has achieved the purpose of "turning waste into treasure" and "treating waste with waste", and has significant environmental and social benefits. At the same time, the organic matter in the sludge can be completely carbonized under the condition of high temperature pyrolysis.

Operation procedure
1. After drying the chemical sludge after belt press filtration, the dry sludge is obtained;
2. Add the activation liquid to the dry sludge, impregnate and activate at the temperature of 50 ~ 100°C, the activation time is 2 ~ 1Oh, stir while activating;
3. Then dry, grind;
4. Using inert gas as protection gas, pyrolysis at 600 ~ 900°C for 0.5 ~ 5h;
5. Cooling, washing, drying, sludge activated carbon.
Patent certificate
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