Poly-generation process for pyrolyzing solid thermal carrier via low-rank coal vibration bed

Abstract

The invention provides a poly-generation process for pyrolyzing a solid thermal carrier via a low-rank coal vibration bed. The process flow is as follows: mixing and retorting coal powder and a high-temperature solid thermal carrier in a vibration carbonization bed; introducing crude gas generated in the retorting process into a gas purification section; carrying out tar deep processing and asphalt modification on the separated tar to prepare crude phenol, an asphalt binder and the like; and carrying out formation and ball pressing on a retorted product powder semi-coke and the asphalt binder as well as other additives, and secondarily carbonizing to prepare a formed coke. In the process provided by the invention, a burning or oxidization phenomenon is not generated during the period of retorting; the product powder semi-coke is low in ash content, high in gas thermal value and high in useful component; the relative motion speed of the solid thermal carrier and the coal powder is small; crude gas does not carry fine coke particles, thereby avoiding adhesion of tar and fine particles on the inner wall of a pipeline and ensuring the long-term operation of a system; and the solid thermal carrier is surrounded by the powder coal, the probabilities of friction and collision between the solid thermal carriers are reduced, and the service life is prolonged. The process provided by the invention is the poly-generation process for pyrolyzing the solid thermal carrier via the low-rank coal vibration bed, and the poly-generation process is practicable in the aspects of technology, materials, cost and the like.

Description

technical field [0001] The invention relates to a coal deep processing technology, in particular to a low-rank coal vibrating bed solid heat carrier pyrolysis polygeneration technology. technical background [0002] my country is rich in low-rank coal resources. In my country's coal resources, young coal with higher volatile content accounts for more than 75% of the country's coal reserves, of which volatile content is more than 35%. More than 50% of young coal accounts for about 50% of the country's coal reserves, most of which are low-rank coals such as lignite, long-flame coal, non-caking coal and weakly caking coal. For example, lignite accounts for 12.7% of the country's proven reserves. Lignite has high moisture content, high ash content, high volatile matter, low calorific value, low ash melting point, and is easy to weather and spontaneously combust, which is not conducive to long-distance transportation, which limits the mining and utilization of lignite. Long-flame...

AI Technical Summary

Problems solved by technology

[0005] Generally speaking, due to factors such as technology, materials and cost, most low-rank coal pyrolysis processes have not formed a considerable industrial scale

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