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Method and system for treating slag-containing coal tar

A coal tar, oil and gas technology, which is applied in the field of processing slag-containing coal tar and the system field of processing slag-containing coal tar, can solve the problems of unfavorable coal tar processing and utilization, excessive waste water, high corrosion resistance requirements of equipment and pipelines, and achieve improvement Effects of utilization rate, quality improvement and cost reduction

Active Publication Date: 2018-07-31
SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Two-step cooling involves a relatively complicated process, which requires high corrosion resistance of equipment and pipelines, produces more wastewater, and the obtained coal tar has a high water content, which is not conducive to the subsequent processing and utilization of coal tar

Method used

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  • Method and system for treating slag-containing coal tar
  • Method and system for treating slag-containing coal tar
  • Method and system for treating slag-containing coal tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0085] figure 1 A flowchart of a first exemplary embodiment of the present invention is shown. Pulverized coal a enters the pyrolysis unit 1 as a raw material. After dry distillation and pyrolysis, oil gas b is produced. In the cooling unit 2, the oil gas b is cooled to obtain slag-containing coal tar c and cooled oil gas d. In the washing unit 3, the slag-containing coal tar c is diluted with detergent e to obtain the slag-containing coal tar f after dilution. In the centrifuge unit 4, the diluted slag-containing coal tar f is centrifuged to obtain oil residue g and deslagging coal tar h containing detergent. In the vacuum flash unit 5, deslagging coal tar h containing detergent is subjected to vacuum flashing to obtain deslagging and deslagging coal tar i and light component j. The deslagging and de-agent coal tar i is sent to the delayed coking unit 6 . After delayed coking, naphtha k and top cycle oil are obtained. At least one of naphtha k and top cycle oil l is ret...

Embodiment 1

[0099] according to figure 1 , carry out embodiment 1. Pulverized coal is used as raw material. The particle size characteristics of pulverized coal are shown in Table 1 below.

[0100] Table 1: Characteristics of particle size distribution of pulverized coal

[0101] Particle size, mm

less than 0.2

0.2-3

3-6

6-13

greater than 13

Mass percentage, %

7.91

27.56

9.69

29.80

25.04

[0102] The pulverized coal a enters the pyrolysis unit 1. In the rotary carbonization reactor, the pulverized coal a is subjected to carbonization and pyrolysis. After dry distillation and pyrolysis, oil gas b is produced. In the cooling unit 2, the oil gas b is cooled to obtain slag-containing coal tar c and cooled oil gas d. The slag-containing coal tar c was analyzed. The mechanical impurity content was 8.06% by weight. The particle size distribution is shown in Table 2 below.

[0103] Table 2: Particle size distribution characteristics of...

Embodiment 2

[0112] In a similar manner to Example 1, Example 2 was carried out, except: the top cycle oil 1 obtained in the retort pyrolysis was also returned to the detergent e.

[0113] The impurity content analysis was carried out on the deslagging and de-agent coal tar i.

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Abstract

The present invention provides a method and a system for treating slag-containing coal tar. The method and the system relate to destructive distillation pyrolysis, oil and gas cooling, detergent dilution, centrifugation, reduced pressure flash evaporation, delayed coking, and preferably also relate to phenol oil extraction, water soluble fertilizer production, hydrogen production, and / or diesel hydrogenation. The method and the system can efficiently remove mechanical impurities in the coal tar, improve the quality of delayed coking products, fully utilize by-products, greatly reduce the costand improve the utilization rate of the coal tar.

Description

technical field [0001] The invention relates to the field of pulverized coal carbonization and pyrolysis, and more particularly relates to a method for processing slag-containing coal tar and a system for processing slag-containing coal tar. Background technique [0002] Coal is a very important energy source and an important raw material for metallurgy, electric power and chemical industry. Coal is typically processed by retorting, gasification and / or liquefaction. Coal produces oil and gas during carbonization, and coal tar is obtained after cooling. The composition of coal tar is extremely complex, containing tens of thousands of organic substances, including aliphatic hydrocarbons, olefins, cycloalkanes and aromatic hydrocarbons and other high-value organic substances. Therefore, coal tar is a very valuable chemical raw material. However, the oil and gas produced by carbonization and pyrolysis of coal, especially pulverized coal, usually contain a large amount of mech...

Claims

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Application Information

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IPC IPC(8): C10C1/04C10C1/18C10B57/00
CPCC10B57/00C10C1/04C10C1/18
Inventor 赵宁刘东
Owner SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND
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