Wing type sludge tube pyrolysis reactor

Abstract

The invention relates to a wing type sludge pipe pyrolysis reactor. The reactor comprises a pyrolysis furnace, a combustion chamber and a flue gas mixing chamber, the bottom part of the pyrolysis furnace is connected with the combustion chamber, the top part of the pyrolysis chamber is connected with the flue gas mixing chamber, a natural gas nozzle is arranged on the combustion chamber, the amount of the natural gas is regulated by a temperature measurement and control instrument arranged on the flue gas mixing chamber, the pyrolysis furnace is internally provided with at least two layers ofpyrolysis tubes, the two ends of each pyrolysis tube both extend out of the pyrolysis furnace, a sludge feed port and a sludge discharge port are respectively arranged at the two ends of the pyrolysistube, the sludge feed port on the pyrolysis tube at the uppermost layer serves as a sludge inlet of the reactor, the sludge discharge port on the pyrolysis tube at the lowermost layer serves as a charcoal outlet of the reactor, the sludge discharge port on the pyrolysis tube at the upper layer among the adjacent pyrolysis tubes is connected with the sludge feed port on the pyrolysis tube at the lower layer among the adjacent pyrolysis tubes, the pyrolysis tube comprises a tube body, and the tube body is internally provided with a hollow spiral sheet. The whole system device produces the valuable charcoal in the process of the ultralow emission of pollutants.

Description

technical field [0001] The invention relates to a pyrolysis reactor for economically and efficiently treating sludge and producing biochar while realizing ultra-low pollutant discharge. Background technique [0002] Sludge is an inevitable by-product of sewage treatment. With the rapid development of economy, a severe situation of water environment and sludge siege has been formed in the world. Sludge contains a large amount of heavy metals, organic matter, etc., which is very harmful. The generation of a large amount of sludge has become an urgent problem for sewage treatment plants. Studies have shown that China produces 3 billion tons of sludge every year, and the European Union produces 5.48 billion tons of sludge every year. As a supporting field of water treatment, sludge disposal and related fields will undertake the important task of improving the environment. However, in reality, our disposal of sludge has not met the corresponding requirements. [0003] The cur...

AI Technical Summary

Problems solved by technology

Since there is only one thicker drum, during its rotation, the dry sludge is thrown from a higher height, and a large amount of pyrolysis gas and leakage gas are discharged at one port to generate air flow, while the fine sludge dust will be pyrolyzed Some sludge that is not completely carbonized will be separated into biochar at the outlet, which increases the environmental risk of biochar resource utilization; some fine sludge is adsorbed by tar, which increases the difficulty of tar upgrading treatment, and some It will pollute the tail gas condensation heat exchange surface, or enter the combustion furnace together with the pyrolysis gas for incineration, increasing the content of flue gas pollutants

[0009] (3) When the pyrolysis products are in the gas scrubber and tail gas condensation separator, tar will inevitably stick or block the connecting pipes and heat exchange surfaces, seriously affecting the normal operation of the system, sometimes enriched to a certain extent, and there will be Deflagration phenomenon, reducing operational safety

[0010] (4) For the drum type pyrolysis furnace, there are certain technical difficulties in the sealing between the large-diameter rotating drum and the fixed hot flue gas heating jacket and the fixed outer cylinder, and multiple leakage points will increase the processing capacity of the flue gas. The calorific value of the pyrolysis gas is further reduced

Therefore, it is economically uneconomical to use high-quality energy natural gas to produce low-quality energy-tar

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