A kind of sludge carbonization method

Abstract

The application discloses a sludge carbonization method, which includes the following steps: 1) first dehydration: use hot air to reduce the water content of sludge by 10-20%; 2) low-temperature inactivation: the sludge after the first dehydration is ‑300°C for the second dehydration and inactivation, so that the water content of the sludge after the second dehydration is less than 10%; 3) Oxygen-controlled combustion: Under the condition of oxygen control, the sludge after the second dehydration is at a temperature lower than 600°C 4) Oxygen-deficient stabilization: send the product obtained from the combustion to the anoxic link for carbonization and stabilization, lower the temperature to below 40°C, and discharge to obtain the final product. The sludge carbonization method provided by this application has a small investment and can realize "sludge burning sludge", while retaining part of the calorific value, making the sludge carbonization stable, increasing added value, turning waste into treasure, and thoroughly disposing of sludge , No pollution, use the truck to carry the sludge, improve work efficiency.

Description

technical field [0001] The present application relates to the technical field of sludge treatment, in particular to a sludge carbonization method. Background technique [0002] At present, general solid waste disposal technologies for high calorific value mainly include landfill, incineration and high-temperature carbonization, etc., which are mostly used to treat the mixture of domestic waste and municipal sludge. Due to the complex composition of the disposal, the disposal process is complicated and the investment is large. , high energy consumption, and low disposal efficiency. Among them, the incineration process requires a large investment, and the components of the products obtained from disposal are complicated, and the final disposal is difficult, and the final products such as chimney ash still need to be landfilled. The high-temperature dry distillation process uses high-temperature anoxic pyrolysis method. Due to the passive pyrolysis method of indirect heat cond...

AI Technical Summary

Problems solved by technology

[0002] At present, general solid waste disposal technologies for high calorific value mainly include landfill, incineration and high-temperature carbonization, etc., which are mostly used to treat the mixture of domestic waste and municipal sludge. Due to the complex composition of the disposal, the disposal process is complicated and the investment is large. , high energy consumption, and low disposal efficiency

Among them, the incineration process requires a large investment, and the components of the products obtained from disposal are complex, and the final disposal is difficult, and the end products such as chimney ash still need to be landfilled.

The high-temperature dry distillation process uses high-temperature anoxic pyrolysis method. Due to the passive pyrolysis method of indirect heat conduction, the heat energy loss is large, resulting in high energy consumption, low heat energy utilization rate, and low production capacity.

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