Sludge treatment equipment

Abstract

The invention relates to sludge treatment equipment, wherein solid combustion-supporting materials such as pulverized coal is provided for a fluidized-bed type gasifier (1), and the consumption of the combustion-supporting materials is reduced as far as possible to seek energy conservation in case of massively treating dewatered sludge. The resolution means is as follows: the sludge treatment equipment (100) is built in the vicinity of cement manufacturing equipment (200); the sludge treatment equipment (100) is provided with the fluidized-bed type gasifier (1) for gasifying sludge to generate a thermal decomposition gas, and a gas conveying pipeline (6) for conveying the generated thermal decomposition gas to a cement preheater (10) or a calcining furnace (20); the solid combustion-supporting materials are provided for the flowing layer (1a) of the gasifier (1), and by virtue of the combustion of the solid combustion-supporting materials, the temperature of the flowing layer is kept at a temperature of greater than 600 DEG C; or, the flowing air provided for the gasifier (1) can also be heated by virtue of the waste heat of the cement manufacturing equipment (200).

Description

technical field [0001] The invention relates to the technology of treating sludge with cement manufacturing equipment. Background technique [0002] In recent years, the amount of domestic garbage and sewage sludge to be treated has increased in China, and sanitary treatment is required, and the treatment of sewage sludge in particular has become more and more problematic. Sewage sludge is usually dehydrated and then buried. However, landfilling causes concerns about groundwater pollution and odor, so incineration is the preferred method. It has always been the case that a small amount of dewatered sludge is mixed with the existing garbage incinerator, but the construction cost of the incinerator is high, and the incineration requires a lot of energy. In fact, the incineration of sewage sludge has not made progress. [0003] On the other hand, focusing on the waste heat of cement manufacturing facilities, it is attempted to realize incineration treatment of sewage sludge at...

AI Technical Summary

Problems solved by technology

[0012] However, if the temperature of the fluidized layer is low, it will be difficult for the pulverized coal to burn through completely during the stay in the layer, and its combustion efficiency will be low.

Therefore, in order to maintain the temperature of the fluidized bed within an appropriate range, additional pulverized coal must be provided, which is likely to increase operating costs

[0013] In addition, the gasification furnace of the above-mentioned technical solution focuses on the situation that the calorific value of domestic waste fluctuates greatly, in order to maintain the temperature of the fluidized bed within an appropriate range, monitor its temperature change, and adjust the supply of pulverized coal, but as above When the combustion efficiency of the above-mentioned pulverized coal is low, even if the supply amount is adjusted, the temperature of the fluidized bed does not easily change, or there is a problem of controllability such as large overshoot.

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