Low-temperature dry distillation equipment and method for low-rank coal and oil shale

Abstract

The invention provides low-temperature dry distillation equipment and method for low-rank coal and oil shale. The equipment comprises a gas retort gyring main engine, a material spiral feeding machine and a gas-solid separating box, wherein the material spiral feeding machine is connected with a material inlet end of the gas retort gyring main engine; the gas-solid separating box is connected with a material outlet end of the gas retort gyring main engine; the gas retort gyring main engine adopts a cylindrical structure which is downward obliquely arranged from the material inlet end to the material outlet end; and internal pipes are coaxially concentrically distributed in a barrel body and capable of storing solid materials and reacting to separate out of a gas flowing channel. A high-temperature smoke inlet ring box is circumferentially connected to the external wall of a small-diameter roller at a material inlet section, and a low-temperature smoke inlet ring box is circumferentially connected to the external wall of a small-diameter roller at a material outlet section. The equipment provided by the invention has the advantages of simple structure, high processing output, heat transfer performance, high efficiency, energy conservation and high purity of gas under dry distillation, can be widely used for low-temperature dry distillation on low-grade fossil energies such as various low-rank coal, low-rank oil shale and petroleum residue, and can produce high-grade products such as coal, coke, shale oil and semi-coke.

Description

technical field [0001] The invention belongs to the field of energy and chemical industry, in particular to low-temperature dry distillation equipment and a low-temperature dry distillation method for low-grade fossil energy. Background technique [0002] Dry distillation generally refers to the process in which solid organic matter is heated in an air-isolated state to undergo a pyrolysis reaction. According to different heating temperatures, it can be roughly divided into low-temperature, medium-temperature, high-temperature and ultra-high-temperature dry distillation. It is commonly used in industry. Coal dry distillation, and Low-temperature dry distillation (500-650°C) can be widely used in low-grade fossil energy such as low-rank coal and oil shale, and its products can obtain high-yield tar and gas, and the remaining solids are semi-coke with high carbon content. The dry distillation process has a long history for processing coal, oil shale and petroleum residues. Tak...

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Problems solved by technology

[0007] The present invention provides a low-temperature carbonization equipment and method for low-rank coal and oil shale, and it is necessary to solve the existing low-temperature carbonization equipment and methods of poor safety, poor energy efficiency ratio, low gas production quality, small output of a single set of equipment, Low oil yield, energy waste, high production cost and other technical problems

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