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Extraction tower, extraction separation system and coal tar extraction process

An extraction tower and coal tar technology, applied in the extraction tower device and coal tar extraction and separation process field, can solve problems such as equipment blockage and the inability of the extraction process to run stably, and achieve the effects of slowing back mixing, avoiding blockage and relieving maintenance time.

Active Publication Date: 2019-05-03
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the known separation technologies, the extraction separation method has been widely used in the existing industrial process, but in the actual extraction and separation process of coal tar, the existence of viscous asphaltenes and ash with uneven particle size in the tar , often cause the blockage of the equipment, resulting in the extraction process cannot run stably, so the structure of the extraction device and the selection of extraction solvent are the key to the reliable operation of the extraction process

Method used

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  • Extraction tower, extraction separation system and coal tar extraction process
  • Extraction tower, extraction separation system and coal tar extraction process
  • Extraction tower, extraction separation system and coal tar extraction process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064]Embodiment 1: The coal tar of about 80 ℃ is transported to the inner cylinder 4 of the extraction tower through the extraction liquid inlet pipe 3, and the n-heptane of equal flow rate is used as a solvent to make the coal tar and the solvent in the inner cylinder 4 of the extraction tower The mass ratio is 1:1, the motor drive mechanism 1 drives the rotating rod 9 and the blade 10 to be in the stirring process all the time, and the outlet valve of the extraction tower located in the extraction phase outlet pipe 11 is opened, so that the extraction phase enters the first extraction phase storage tank 21 In, the extraction phase is divided into n-heptane and enters the first solvent storage tank 41 through the first separator 31 (such as a distillation separator), and the extract is stored in the first extract storage tank 51, and in the first solvent storage tank 41 The n-heptane circulates into the extraction tower for extraction. After the n-heptane is recycled for 3 ti...

Embodiment 2

[0067] Example 2: The coal tar at about 50°C is transported to the inner cylinder 4 of the extraction tower through the extraction liquid inlet pipe 3, and the equal flow rate of n-heptane is used as the solvent, and the inner cylinder 4 makes the mass ratio of tar and solvent 1:1, The motor drives the rotating rod 9 and the blade 10 to be in a stirring state all the time, and the outlet valve of the extraction tower is opened, and the extraction phase enters the first extraction phase storage tank 21, and the extraction phase is divided into n-heptane by the first separator 31 and enters the first solvent storage tank. In the tank 41, the extract is stored in the first extract storage tank 51, and the n-heptane in the first solvent storage tank 41 circulates into the extraction tower for extraction. After the n-heptane circulates 3 times, the first extract storage tank The n-heptane extract obtained in 51 accounts for 84.2% of the original tar mass percent;

[0068] Replace t...

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Abstract

The invention discloses an extraction tower, an extraction and separation system and a coal tar extraction process. The extraction tower comprises a stirring device, a filter sieve plate (8) and a nested outer cylinder (5) and an inner cylinder (4). The filter sieve plate can be Removably installed at the bottom end of the inner cylinder. The extraction and separation system includes an extraction tower and a separation unit. The separation unit includes an extraction phase storage tank, a separator, a solvent storage tank and an extract storage tank. The phases are separated into an extract and a solvent by a separator, and the separated solvent is stored in a solvent storage tank and can be refluxed to the inner barrel through the solvent inlet pipe (2). The extraction tower of the present invention can avoid clogging, facilitate maintenance, and can effectively slow down the back-mixing phenomenon in the extraction and separation process. The extraction and separation system and process can achieve rapid and efficient separation of light and heavy components and impurities in coal tar under mild conditions, and reduce the coke powder, coal powder and inorganic mineral components rich in residual asphalt.

Description

technical field [0001] The invention belongs to the field of extraction devices and techniques, and in particular relates to an extraction tower device and an extraction and separation process for coal tar using the extraction tower. Background technique [0002] Coal tar is a brown or black viscous liquid product obtained during thermal distillation or gasification of coal, and has a pungent odor. Coal tar itself is unstable in nature and its composition is relatively complex. It is mainly composed of water, alkanes, aromatics and some heteroatom (sulfur, nitrogen and oxygen) compounds, and the composition and content vary with the working conditions (temperature, pressure, residence time, Heating rate, with or without catalyst) varies widely. At present, there are three main ways to use coal tar: one is to burn directly or undergo hydrogenation treatment as gasoline and diesel blend oil; the other is to finely process it into intermediate products of various chemicals or ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D11/04C10C1/18
CPCB01D11/0434C10C1/18B01D11/0457
Inventor 芦海云陈爱国孙任晖赵帅高鹏刘爱国郭屹
Owner CHNA ENERGY INVESTMENT CORP LTD