Sludge pyrolysis device with functions of porous medium heat accumulating, material equalizing, pre-heating and drying

Abstract

The invention discloses a sludge pyrolysis device with functions of porous medium heat accumulating, material equalizing, pre-heating and drying. The sludge pyrolysis device comprises a product collecting chamber at the lower part, a pre-heating and drying chamber above a sieve plate, a porous medium heat-accumulating burning chamber and a sludge pyrolysis reaction chamber, wherein the porous medium heat-accumulating burning chamber and the sludge pyrolysis reaction chamber are independently distributed and formed by cavities between a base plate and the sieve plate; a feed inlet is arranged on the top of the pre-heating and drying chamber; a porous material-equalizing circular disc is arranged in the pre-heating and dying chamber below the feed inlet; a pyrolysis gas discharge pipeline is arranged in the pre-heating and dying chamber; the top end of the sludge pyrolysis reaction chamber is communicated with the pre-heating and drying chamber by sieve holes of the sieve plate; the bottom end of the sludge pyrolysis reaction chamber is communicated with the product collecting chamber by a discharge opening; a non-condensable pyrolysis pipeline and a smoke discharging pipeline are arranged in the porous medium heat-accumulating burning chamber; and the smoke discharging pipeline is connected with the porous medium heat-accumulating burning chamber through a recycling pipeline and an air pipeline. According to the sludge pyrolysis device with the functions of porous medium heat accumulating, material equalizing, pre-heating and drying, the sludge energy can be effectively transformed and recycled.

Description

technical field [0001] The invention relates to a waste heat storage type pyrolysis reactor, in particular to a sludge pyrolysis device suitable for municipal domestic sludge and industrial sludge with the functions of heat storage in porous media and uniform material preheating and drying . Background technique [0002] Sludge (Sewage Sludge, SS) generally refers to the mixture or colloid of solids and water deposited in the drainage pipes and channels produced during the water treatment process. An extremely complex heterogeneous body composed of other components. With the acceleration of urbanization and industrialization in my country, the discharge of urban sewage and industrial sewage is increasing. According to the 2010 China Environmental Status Bulletin, 22 million tons of sludge are generated every year, 80% of which have not been effectively treated. Because sludge enriches pollutants in sewage, it contains a large number of toxic and refractory substances such ...

AI Technical Summary

Problems solved by technology

For example: in the process of digestion and conditioning of sludge, a large amount of NH should be discharged 4 、H 2 S, CH 4 , odor and other gaseous pollutants, which will have a negative impact on the environment; the energy consumption and cost are high in the drying process of sludge, and the utilization rate of energy in the pyrolysis process is not high

At the same time, the separation of the sludge drying device and the sludge feed also makes the system more complicated

[0004] The existing sludge treatment devices do not comprehensively consider material homogenization, preheating drying, regenerative pyrolysis and comprehensive waste heat utilization, resulting in a great waste of resources and energy

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