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Low-temperature dry-distillation oil-extraction process of small-granule oil shale

A technology of oil mother shale and small particles, which is applied in the field of oil mother shale dry distillation, can solve the problems of abnormal production and operation, abandoned oil mother shale, small particle size of materials, etc., achieves significant social and economic benefits, and solves the effects of dust entrainment and environmental pollution reduction.

Active Publication Date: 2014-03-19
辽宁东大粉体工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a small particle shale for the problem that in the traditional kerogen shale dry distillation and oil extraction process, the equipment is often blocked due to the small size of the material and cannot be operated normally, resulting in the waste of small kerogen shale. Oil shale low-temperature dry distillation pyrolysis oil extraction process, the process uses the modified multi-stage furnace as a low-temperature dry distillation equipment for small particle oil shale dry distillation oil extraction process, and uses the gas after oil extraction as a circulating heat carrier to realize drying of materials The whole process of preheating, low-temperature dry distillation pyrolysis, and extraction of crude oil

Method used

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  • Low-temperature dry-distillation oil-extraction process of small-granule oil shale

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Effect test

Embodiment 1

[0028] A low-temperature dry distillation pyrolysis oil extraction process of small particle kerogen shale, comprising the following steps:

[0029] 1. Select small-grain kerogen shale tailings by screening, select small-grain kerogen shale with a particle size of ≤30 mm, a water content of 19.8%, a volatile matter of 28.7%, and an oil content (ω) of 7.4% as materials, and send the materials to the top of the multi-stage furnace The material enters the drying section through the feeder and the feeding pipe. Under the thrust of the rake teeth in the furnace, the material is evenly pushed and turned on each furnace level, and moves down layer by layer, and is combined with the pyrolysis produced by the dry distillation section. And the hot oil, gas and gas that pass through the furnace layer of the preheating section and rise to the drying section are in countercurrent and mixed flow contact to complete the drying and dehydration process;

[0030] 2. After the dried oil shale ma...

Embodiment 2

[0036] A low-temperature dry distillation pyrolysis oil extraction process of small particle kerogen shale, comprising the following steps:

[0037] 1. Select small-grain kerogen shale tailings with particle size ≤30 mm, water content 17.2%, volatile matter 25.2%, oil content (ω) 3.0% as materials through screening, and feed the materials into the upper hopper of the multi-stage furnace, And enter the drying section through the feeder and the feeding pipe. Under the thrust of the rake teeth in the furnace, the material is evenly pushed and turned on each furnace level, and moves down layer by layer, and is combined with the pyrolysis produced by the dry distillation section. The hot oil, gas and gas in the preheating section rises from the furnace layer to the drying section in countercurrent and mixed flow contact to complete the drying and dehydration process;

[0038] 2. The dried kerogen shale material enters the preheating section through the drying section. Under the thr...

Embodiment 3

[0044] A low-temperature dry distillation pyrolysis oil extraction process of small particle kerogen shale, comprising the following steps:

[0045] 1. Select small grain kerogen shale tailings with particle size ≤30 mm, water content 9.8%, volatile matter 31.2%, and oil content (ω) 9.3% as materials through screening, and feed the materials into the upper hopper of the multi-stage furnace. And enter the drying section through the feeder and the feeding pipe. Under the thrust of the rake teeth in the furnace, the material is evenly pushed and turned on each furnace level, and moves down layer by layer, and is combined with the pyrolysis produced by the dry distillation section. The hot oil, gas and gas in the preheating section rises from the furnace layer to the drying section in countercurrent and mixed flow contact to complete drying and dehydration;

[0046] 2. The dried kerogen shale material enters the preheating section through the drying section. Under the thrust of ra...

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Abstract

The invention provides a low-temperature dry-distillation pyrolytic oil-extraction process of small-granule oil shale, aiming at solving the problem that the small-granule oil shale is discarded caused by the factor that the equipment is blocked and cannot operate normally due to small material granularity in a traditional dry-distillation oil-extraction process of the small-granule oil shale. In the dry-distillation oil-extraction process of the small-granule oil shale, a transformed multi-stage furnace serves as low-temperature dry-distillation equipment, the small-granule oil shale is fed into the furnace through a hopper above the multi-stage furnace, is uniformly pushed and turned over under the pushing action of a rabble blade in the furnace, moves downwards through a drying section, a preheating section, a dry distillation section and a cooling section sequentially, and then is subjected to drying, preheating, dry distillation and pyrolysis to obtain hot oil and gas and semicoke, the hot oil and gas passes through the preheating section and the drying section upwards, is dedusted by a dispersion section and then is exhausted to the outside of the furnace, and shale oil and gas are extracted, and the gas used as a heat carrier is repeatedly cycled. The process can effectively utilize the small-granule oil shale resource.

Description

technical field [0001] The invention relates to the technical field of dry distillation of kerogen shale, and mainly relates to a dry distillation process of small grain kerogen shale. Background technique [0002] Oil shale is a world-recognized resource that supplements or replaces petroleum energy. With the continuous rise of international oil prices, the difficulty of developing remaining oil and low-permeability oil and gas reservoirs, and the lack of major breakthroughs in the bottleneck technology of natural gas hydrate development, etc. , the emphasis on the development and utilization of oil shale will continue to be strengthened. In the world, the United States, Russia, Estonia, China, Brazil, Australia and other countries have conducted long-term research and development work on the utilization of oil shale. The developed low-temperature dry distillation process is divided into gas heat carrier process and solid heat carrier process from the heat supply method. ...

Claims

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Application Information

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IPC IPC(8): C10G1/00
Inventor 张继宇
Owner 辽宁东大粉体工程技术有限公司
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