Sludge treatment system and treatment method thereof

Abstract

The invention discloses a sludge treatment system and method. The sludge treatment system comprises a sludge drying device, a pyrolyzing furnace, a combustion chamber, a waste heat boiler, and a super-heated steam passage, wherein the sludge drying device is used for drying sludge to obtain dried sludge; the pyrolyzing furnace is communicated with the sludge drying device, and used for pyrolyzing the dried sludge to obtain pyrolyzed oil gas and pyrolyzed carbon; the combustion chamber is communicated with the pyrolyzing furnace and the sludge drying device, and used for directly combusting the pyrolyzed oil gas to obtain high-temperature flue gas, and purifying sludge drying odor via combustion to achieve the odor removing effect; the waste heat boiler is communicated with the combustion chamber; water in the waste heat boiler is heated by the high-temperature flue gas, so as to obtain super-heated steam and cooled flue gas; the super-heated steam passage is communicated with the waste heat boiler and the sludge drying device, and used for providing heat to the drying treatment via the super-heated steam. The sludge treatment system is simple in structure, high in heat efficiency and low in energy consumption.

Description

technical field [0001] The invention relates to a sludge treatment system and a sludge treatment method. Background technique [0002] As of 2013, the annual sludge output of my country's sewage treatment plants has reached 30-35 million tons, but currently about 80% of the sludge has not been stabilized, and a large amount of wet sludge has been transported randomly, simply landfilled or stacked, resulting in Many cities are "sieged with sludge". [0003] The existing sludge pyrolysis technology can obtain three products: oil, gas and charcoal. However, in the process of oil and gas separation, it is easy to cause pipeline blockage. Moreover, the quality of pyrolysis oil is low, and it needs to be hydrogenated before it can be used, resulting in high utilization costs; and the large amount of oily sewage obtained after oil-water separation is difficult to treat, which increases the operating cost of sludge treatment. Therefore, the system and method of sludge treatment ar...

AI Technical Summary

Problems solved by technology

However, in the process of oil and gas separation, it is easy to cause pipeline blockage

Moreover, the quality of pyrolysis oil is low, and it needs to be hydrogenated before it can be used, resulting in high utilization costs; and the large amount of oily sewage obtained after oil-water separation is difficult to treat, which increases the operating cost of sludge treatment

Therefore, the system and method of sludge treatment are to be studied

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