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Device and recovery method for recovering oil or solvent by spray flash drying for oil containing solids

A technology of flash drying and oil products, applied in the field of coal chemical industry, can solve the problems of not being able to fully utilize the advantages of high value-added components in oil residues

Active Publication Date: 2021-07-06
CHINA SHENHUA COAL TO LIQUID & CHEM CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used methods include blending burning, dry distillation and gasification, but these existing methods cannot give full play to the advantages of medium and high value-added components such as oil residue, oil sludge, and oil sand.

Method used

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  • Device and recovery method for recovering oil or solvent by spray flash drying for oil containing solids
  • Device and recovery method for recovering oil or solvent by spray flash drying for oil containing solids

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Such as figure 1 As shown, the raw material is a recovery process of the extractant in a coal-based oil residue raffinate of a coal chemical plant. The process is a spray drying operation under reduced pressure. The specific steps include:

[0052] (1) The first choice is to input the extractant in the viscous oil residue, that is, the coal-based oil residue raffinate, into the raw material buffer tank 1 through the raw material delivery pipeline 1.1 and pressurize it through the feed pump 2, and then send it to the oil residue preheater 3, After exchanging heat with the oil gas (or solvent) at the top of the spray flash drying tower 6, it is sent to the oil residue heater 4 to exchange heat with the heat transfer oil to 200-250°C, and then enters the heating furnace 5 to be heated to about 360-380°C, and then enters the In the spray flash drying tower 6, the specific feed position is close to the upper side of the spray flash drying tower; meanwhile, the spray flash dr...

Embodiment 2

[0058] Such as figure 2 As shown, the raw material is naphtha, and the oil product therein is light oil, so it can be flashed under normal pressure. Compared with Example 1, the specific process device has no dry material lock hopper, dry material bin, heating furnace and vacuum pump. Others are with embodiment 1.

[0059] Application process method of the present invention can adopt following steps

[0060] Include the following steps:

[0061] (1) Input the naphtha into the feed buffer tank 1, and after being pressurized by the feed pump 2, send it to the preheater 3, and send it to the The heater 4 exchanges heat with the heat transfer oil to about 280°C and enters the spray flash drying tower 6; at the same time, the spray flash drying tower 6 quickly flashes the light oil under normal pressure conditions to obtain light oil and gas respectively. Phases and powdery dry granules;

[0062] (2) The powdery dry particles are fed into the dry phase cooler 10 by gravity sel...

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Abstract

A device and method for recovering oil or solvent by spray flash drying for oil containing solids, comprising a feed buffer tank, a preheater, a heater, a spray flash drying tower, a dry gas phase scrubber, and a solvent condenser; The feed port of the feed buffer tank is connected with the raw material conveying pipeline, the discharge port is connected with the feed port of the preheater, the discharge port of the preheater is connected with the feed port of the heater, and the discharge port of the heater is connected with the feed port of the heater. The spray flash drying tower is connected; the upper end of the spray flash drying tower is equipped with a gas phase discharge pipeline, and the gas phase discharge pipeline is connected with the drying gas phase scrubber. The outlet accepts the powder bin; the lower half of the drying gas scrubber is equipped with a condensing device, the bottom is equipped with a circulation pipeline, and the upper end is equipped with a gas phase circulation pipeline. The cooled non-condensable gas is transported to the solvent condenser through the non-condensable gas pipeline to be condensed again.

Description

technical field [0001] The invention relates to the technical field of coal chemical industry, in particular to a device and method for recovering oil or solvent by spraying and flash drying of solid oil products (such as oil residue, oil sludge, oil sand, etc.). Background technique [0002] With the growth of demand for energy and chemical products in China, the contradiction between the supply and demand of high-quality energy such as oil and natural gas in my country is very prominent. Oil residue, oil sludge, oil sand, etc. are solid oil products. Oil sand heavy oil reserves are 400 billion tons, which is far greater than the proven reserves of oil; during oilfield exploitation, a large amount of oil sludge sand will be produced, and oil transportation will also produce a large amount of bilge sludge. According to incomplete statistics, my country produces at least 1.3 million tons of oil sludge; oil residues are mainly produced in coal liquefaction, kerosene co-refinin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/02
CPCC10G1/02
Inventor 刘东明韦存福耿永凯李兵李帅谢琤李伏虎刘浙军宣奇龙周志岩郑丽珍张源梅红波
Owner CHINA SHENHUA COAL TO LIQUID & CHEM CO LTD