Sludge multi-effect drying incineration treatment system and application method thereof

Abstract

The invention discloses a sludge multi-effect drying incineration treatment system and an application method thereof. The system comprises an incineration system, a combined drying system, a flue gas waste heat recycling system and a flue gas treatment discharging system. According to the system, the heat is transferred into a combined gas bed drying process of a hot carried gas by one step through a dividing wall by virtue of high-temperature flue gas obtained via the incineration of the sludge. Thus, the system has the advantages of high heat-transfer drying efficiency, safety, explosion resistance, large production capacity, low large-scale investment of a sludge treatment device, gradient utilization of heat energy of dry waste steam and good energy conservation effect; a dry smelly non-condensable gas which is sent into a fluidized bed incinerator can be completely deodorized.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a system and a use method for multi-effect drying and incineration treatment of sludge. Background technique [0002] In the fields of energy, chemical industry, textile printing and dyeing, papermaking, municipal administration, environmental protection and other fields, a large amount of sludge with high moisture content is usually produced. At present, the amount of sludge produced by municipal and industrial sewage treatment is the largest. With the acceleration of urbanization in my country and the continuous construction of sewage treatment plants, the amount of industrial and domestic sewage treatment in China is increasing rapidly, and more sludge will be generated. [0003] The composition of sludge is very complex. In addition to a large amount of water, it also contains a large amount of organic matter, refractory organic matter, various trace elemen...

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Problems solved by technology

It can be seen that because the invention uses flue gas as the carrier gas to directly supply heat and enter the dryer for drying, it has the advantages and disadvantages of using flue gas as the heat medium to directly contact the convection heat drying technology, that is, the drying efficiency is high, but most of them contain stinky smoke It is difficult or costly to treat the gas thoroughly, the wet steam in the dry gas has a low dew point and it is difficult to condense cascade utilization, the energy consumption of the whole system is high and it is easy to cause secondary pollution to the environment

[0035] Generally speaking, the current sludge drying and incineration treatment system mainly has the following problems: low heat transfer efficiency of the sludge drying system, high energy consumption, low production capacity, high investment and operation costs, and pollution such as odor during the drying and incineration process Things are not easy to control, difficult to scale up, etc.

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