Oil shale dry-wet mixing method dry distillation technology and heat accumulating type external firing shale oven

Abstract

An oil shale dry-wet mixing method dry distillation technology and a heat accumulating type external firing shale oven are respectively a technology and a device for obtaining shale oil and high heating value gas via low-temperature dry distillation. In a new dry distillation technology, a group of heat transmission tube bundle is arranged in the shale oven, high-temperature combustion products, which are mixed well, flow in the tubes, and the external side of each tube directly exchanges heat with the shale to produce oil vapor. A new shale oven is of a shaft-furnace structure, and materials moves from top to bottom under the action of gravity and a drop guide. Combustion chambers are arranged at two sides of the shale oven, and a heat accumulating type combustion technology and a flue gas flow-back exchange mode are used for producing high-temperature flue gas flowing through a heat exchange tube bundle in the shale oven, so as to provide a heat source for the shale oven.

Description

technical field [0001] The invention belongs to the field of low-temperature dry distillation of kerogen shale, in particular to a process and a device for obtaining shale oil and high calorific value gas by low-temperature dry distillation. Background technique [0002] In the context of the current energy shortage, the domestic oil gap is gradually increasing. Domestic kerogen shale reserves are huge, and the low-temperature dry distillation of kerogen shale to produce shale oil is in line with my country's sustainable development strategy. At present, low-temperature carbonization technologies at home and abroad are mainly divided into two types: one is to use the combustion method at the bottom of the carbonization furnace, and use the flue gas produced by burning semi-coke and the circulating gas gas to heat the gas outside the furnace as the heat carrier. Fushun retort process; the other is to use the regenerative circulating gas heating furnace outside the retort fur...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the shortcomings of the existing dry distillation process and equipment, the present invention provides a kind of kerogen shale dry-wet mixed dry distillation process and regenerative external combustion dry distillation furnace

Images