Oil-containing sludge incineration system for pressurized fluidized bed and incineration treatment method

Abstract

The invention discloses an oil-containing sludge incineration system for a pressurized fluidized bed and an incineration treatment method. The process comprises the following steps: introducing preheated pressurized air into a fluidized bed incinerator, adding oil-containing sludge into the incinerator to pressurize and combust under a fluidized state, and supplementing auxiliary fuels to keep a combustion state stable if combustion heat is insufficient; enabling high-temperature pressurized wet flue gas generated in the incinerator to preheat pressurized air for combustion of the fluidized bed incinerator, preliminarily cooling the pressurized air into medium-temperature pressurized wet flue gas; continuously performing dust-removal denitration treatment on the flue gas to obtain medium-temperature pressurized clean wet flue gas, and recycling separated fly ash; recycling sensible heat of the medium-temperature pressurized clean wet flue gas through a waste heat recycling system, andrealizing up-to-standard emission through treatment such as a follow-up decompression system and a dehumidifying system. Reduction, harmless and resource utilization as well as energy conservation andemission reduction are realized on the oil-containing sludge, so that combustion efficiency can be greatly improved, equipment unit area processing ability is improved, and emission of harmful substances in flue gas is reduced.

Description

technical field [0001] The invention belongs to the technical field of oily sludge treatment, and in particular relates to a pressurized fluidized bed oily sludge incineration system and an incineration treatment method thereof. Background technique [0002] Oily sludge is mainly oil sludge and oil sand produced by petroleum exploration and development industry and petrochemical industry. A large amount of water treatment agent added. Oily sludge has the characteristics of large volume, large volume, high oil content, difficult treatment, and few comprehensive utilization methods. If it is not treated, it will pollute the environment. In addition, sludge contains a large amount of oily substances, which is also a kind of Important resources, if not recycled, will cause waste of resources. Therefore, oily sludge must be reduced, harmless and recycled. [0003] At present, the treatment methods of oily sludge mainly include the following types: landfill method, conditioning...

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Problems solved by technology

[0005] At present, the incineration methods mainly include rotary kiln incineration method and fluidized bed incineration method, etc. For example, patents CN208025528U, CN108298796A, CN203036646U and CN207407355U all use the rotary kiln method. This method has mature technology, strong adaptability to sludge, and sludge is treated more thoroughly. , resources in the sludge can be recycled in the form of heat, but the thermal efficiency is low, the floor area is large, the processing capacity of a single equipment is small, and the equipment investment and operating costs are high; while the patent CN207674458U adopts the normal pressure fluidized bed incineration method, the The equipment used in the method is simple, with high reaction mass transfer and heat transfer efficiency, high combustion efficiency, and large processing capacity per unit area of ​​the equipment. It is especially suitable for oily sludge with high water content, but more energy needs to be added, and the ash content is high. The content of nitrogen and sulfide is also high, although the processing capacity per unit area of ​​the equipment has increased, but the processing capacity is still small

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