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High-temperature-resistant oil shale powder slag cold-pressing ball and preparation method thereof

A technology of oil shale powder and cold-pressed balls, which is applied in the petroleum industry, special forms of carbonization, coking ovens, etc., can solve problems such as lack of competitiveness, excessive environmental pollution, and large heat loss, so as to improve work efficiency and prolong cleaning. Furnace cycle, pollution reduction effect

Inactive Publication Date: 2011-10-05
张玉山
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing retort refinery equipment (domestic Fushun retort and Brazilian retort) that can operate continuously for a long time (more than 330 days per year) has four major disadvantages: ① Detrital shale below 8-15mm (accounting for the total 20-25% of the total) was discarded; ② Massive shale [(8-15)mm, accounting for 75-80% of the total], the refining oil yield is 63% (Fushun type) ~ 90% (Brazil), namely 10~37% shale oil loss; ③The residue after dry distillation (the Fushun type is called ashes, the Brazilian type is called semi-coke) has a calorific value of 2500~3800kj / kg, and the heat loss is large; ④The environmental pollution of slag discharge, waste gas and sewage exceeds the standard
However, due to its low oil content, low calorific value, and high development and utilization costs, it is not competitive in the era of low oil and coal prices.
With the continuous growth of global energy demand and the rapid rise of world oil prices, it is of great practical significance to seek effective development and economic utilization of oil shale to alleviate the contradiction between energy supply and demand and promote social development. However, in the existing technology Even if the clastic shale below 8-15mm can be refined, there is still an important problem-short furnace cleaning cycle and low work efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Oil shale powder residue R 1 The moisture content is 6.5% and the oil content is 4.4%.

[0021] Get 100 parts by weight of oil shale slag R 1 , crush the oil shale slag to a particle size of less than 5mm to obtain oil shale coarse powder; use cement as a binder, add 5% of the total weight of cement and 5% of the total weight of coal slime to the oil shale coarse powder In the process, stir evenly with a mixer to obtain a mixture; cold press the mixture into a ball with a diameter of 60 mm and a strength of 180 kg / cm 2 The oil shale powder and slag cold-pressed balls; the oil shale powder and slag cold-pressed balls are put into the retort furnace for carbonization. The retort temperature is 500°C, and the oil is extracted. The oil yield is 4.2%, and the furnace cleaning cycle is 25 days.

Embodiment 2

[0026] Oil shale powder residue R 2 The moisture content is 6.0% and the oil content is 4.3%.

[0027] Get 150 parts by weight of oil shale slag R 2 , pulverize oil shale slag with particle size less than 8mm to particle size less than 5mm to obtain oil shale coarse powder; add self-made binder accounting for 2% of total weight and coal slime accounting for 10% of total weight into oil shale coarse powder Among them, the self-made binder is made of boronite with a mass percentage of 20-40%, 20-30% viscose, and the balance of water. Stir evenly with a mixer to obtain a mixture; cold press the mixture into a ball with a diameter of 30 mm and a strength of 140 kg / cm 2 The oil shale powder and slag cold-pressed balls; put the oil shale powder and slag cold-pressed balls into the retort furnace for carbonization. The retort temperature is 500°C to refine oil. The oil yield is 4.3%, and the furnace cleaning period is 28 days.

Embodiment 3

[0032] Oil shale powder residue R 3 The moisture content is 6.5% and the oil content is 3.7%.

[0033] Get 120 parts by weight of oil shale slag R 3 , pulverize the oil shale powder slag with particle size less than 8mm to particle size less than 5mm to obtain oil shale coarse powder; use cement as binder, add 3% cement and 7% coal slime to oil In the shale coarse powder, stir evenly with a mixer to obtain a mixture; cold press the mixture into a ball with a diameter of 50mm and a strength of 100kg / cm 2 The oil shale powder and slag cold-pressed balls; put the oil shale powder and slag cold-pressed balls into the retort furnace for carbonization. The retort temperature is 500°C to refine oil. The oil yield is 3.7%, and the furnace cleaning cycle is 29 days.

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Abstract

The invention discloses a high-temperature-resistant oil shale powder slag cold-pressing ball. The oil shale powder slag cold-pressing ball is characterized by being prepared from 2 to 5 weight percent of adhesive, 5 to 10 weight percent of coal slurry and the balance of oil shale raw ores, and has the diameter of between 30 and 60mm and the intensity of between 50 and 200kg / cm<2>, wherein the adhesive is cement or a self-made adhesive and is prepared from 20 to 40 mass percent of bentonite, 20 to 30 mass percent of viscose and the balance of water. Waste oil shale powder slag is successfully prepared into the oil shale powder slag cold-pressing ball which is subjected to dry distillation in a furnace and is used for extracting petroleum; and the oil shale powder slag cold-pressing ball has high intensity, greatly reduces mining cost without the reduction in oil yield, saves resources, reduces pollution, has high temperature resistance, effectively prolongs the furnace cleaning period of an oil smelter and improves working efficiency.

Description

technical field [0001] The invention relates to the field of refining shale oil, and in particular provides a high-temperature-resistant cold-pressed ball of oil shale powder and slag and a preparation method thereof. Background technique [0002] Oil shale is an oil-bearing rock formation and is an important energy material, mainly used for power generation and extraction of shale oil. In the world, oil shale that can produce more than 0.25 barrels (ie 0.034 tons) of shale oil per ton of oil shale is often called "oil shale mine", or oil shale with an oil production rate higher than 4%. for the mine. In my country, oil shale with an oil content of more than 5% is defined as a rich ore, and reserves are calculated; oil shale with an oil content of less than 5% is defined as a lean ore, and reserves are not calculated. Oil shale reserves are huge, if converted into calorific value, the world's oil shale reserves rank second only to coal, and are 5.4 times the proven recover...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/06C10B57/04C10B53/08
Inventor 张玉山
Owner 张玉山
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