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Aerobic low-temperature dry distillation process and device

A low-temperature, high-tech technology, applied in the field of aerobic low-temperature carbonization technology and equipment, can solve the problems of expensive imported equipment, high cost, and difficult management, and achieve the goal of increasing complexity and difficulty in operation and management, and reducing quality and temperature Requirement, effect of simplifying heating furnace

Inactive Publication Date: 2013-03-20
吴冠蕾
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the current domestic oil shale and coal dry distillation refining system complex, cumbersome operation, small daily processing capacity of the device, large floor area, difficult management, high cost, low oil recovery, expensive imported equipment, etc. , to provide a dry distillation process with large daily processing capacity, high oil recovery, low investment and easy operation

Method used

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Embodiment Construction

[0012] The technical process of the concrete implementation of the present invention sees attached figure 1 . After the raw material (oil shale or coal) is crushed and screened into particles of 6-50 mm, it is first dried with the waste flue gas discharged from the heating furnace and heated to above 50°C before being sent to the dry distillation furnace for dry distillation (if the raw material has low water content, it can also be used without dry). The circulating gas heated by the heating furnace (air, flue gas, gas produced by carbonization, the oxygen content can be from 0 to 21%) is sent from the middle of the carbonization furnace after being heated to above 400 ° C, and the circulating gas enters the carbonization furnace. The temperature can also be lower than 400°C, as long as the raw material can be heated above 250°C. When the temperature of the raw materials in the carbonization furnace reaches above 250°C, methane gas is released. At this time, cold air is sen...

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Abstract

The invention relates to a process and a device for carrying out dry distillation to raw materials (oil shale or coal) under aerobic low-temperature conditions. The process and the device are suitable for oil shale with various qualities, especially for low-quality oil shale. During dry distillation, air is directly introduced to the lower part of a dry distillation furnace, and methane generated by cracking the oil shale or the coal is oxidized at a low temperature to release heat required for the dry distillation of the raw materials; the highest temperature in the dry distillation furnace is controlled below 550 DEG C, and the temperature of a dry distillation section is kept between 500 DEG C and 550 DEG C; the oxygen content in outlet gas of the dry distillation furnace is controlled within 2%, and an electric oil trap can be used as an oil recovering system; and the oil recovering rate is above 90%.

Description

Technical field [0001] The present invention is a technology and device for dry distillation of raw materials (oil shale or coal) under the condition of oxygen and low temperature (lower than 550°C). Background technique [0002] At present, the carbonization process at home and abroad is under the condition of isolating the air, that is, under the condition of anaerobic condition, the carbonized substance (such as: coal, oil shale, etc.) is released by baking at high temperature (temperature exceeding 600 ° C). Combustible fuel gas, get coke. The same is true in the oil shale dry distillation refining industry. Oxygen is regarded as a taboo, because the contact between oxygen and combustible fuel gas is easy to burn and even explode at high temperature. Therefore, the isolation of dry distillate and air has always been regarded as an essential measure in the dry distillation process. For example, before the start-up of the retort plant, the first process is to purge the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/06C10B53/04C10B57/14C10B57/00C10B49/02C10B15/00C10B29/00
Inventor 吴启成吴冠蕾
Owner 吴冠蕾
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