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Delay coking hydrogenation combined process for coal oil

A delayed coking and combined process technology, applied in the field of coal chemical industry, can solve problems such as air pollution and dust pollution, and achieve the effect of reducing environmental pollution and increasing added value

Active Publication Date: 2009-05-13
SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, impurities such as sulfur and nitrogen contained in it will become oxides of sulfur and nitrogen during the combustion process and released into the atmosphere, causing air pollution, and the coal combustion process also causes dust pollution.

Method used

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  • Delay coking hydrogenation combined process for coal oil
  • Delay coking hydrogenation combined process for coal oil
  • Delay coking hydrogenation combined process for coal oil

Examples

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Embodiment Construction

[0021] The following examples illustrate the present invention further:

[0022] combine figure 1 In this embodiment, the coal tar 13 preheated to 300-400°C is heated to 450-550°C in the delayed coking heating furnace 1 and then enters the coke tower 2, and the oil produced after the coking reaction enters the delayed coking fractionation tower 3 for fractional distillation. Coked gasoline 15, coked diesel oil 16, and coked wax oil 17 enter the intermediate mixing tank 4. During the operation, the pressure of the coke tower is controlled at 0.28Mpa, and the temperature is controlled between 450-550°C. The two coke towers are operated in a period of 18 hours or 24 hours. 19. At the same time, the fuel gas 14 is separated from the upper part of the coking fractionation tower 3 and enters the fuel gas pipeline network after being desulfurized. The circulating oil 18 is separated at the bottom of the coking fractionation tower 3 and returned to the entrance of the delayed coking...

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Abstract

The invention provides a combined technique for delayed coking and hydrogenation of coal tar. The combined technique adopts the delayed coking and hydrogenation method to perform delayed coking, hydrogenation and final refining on the coal tar, wherein the hydrogenation process comprises hydrotreating, hydrorefining and hydrocracking; and liquefied gas, fuel oil and lube base oil are finally obtained. The key point of the combined technique is to utilize the combined technique of delayed coking and hydrogenation to adjust the technological conditions of the delayed coking technology and the hydrogenation technology, so as to realize final aim of modification of the coal tar. The combined technique converts the coal tar with low value and high pollution into clean and superior liquefied gas, gasoline, diesel fuel, lube and so on, improves the added value of products, and reduces environmental pollution.

Description

(1) Technical field [0001] The invention relates to the field of coal chemical industry, in particular to a combined process of delayed coking and hydrogenation of coal tar. (2) Background technology [0002] Coal tar is one of the products of coal coking and coal gasification. The research on producing fuel oil products such as gasoline and diesel oil through deep processing of coal tar has attracted much attention and invested a lot of money and manpower in the 1950s and 1960s. Due to the discovery and exploitation of underground oil in Daqing, Xinjiang and other places in our country, petroleum products as the main energy soon replaced the engine fuel produced by coal liquefaction, gasification and coking. Since the 1970s, my country's deep processing of coal tar to produce high-quality and environmentally friendly gasoline, diesel and other fuel oil products has hardly been paid attention to. With the improvement of people's awareness of petroleum resources, the comprehe...

Claims

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Application Information

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IPC IPC(8): C10G67/00
Inventor 王守峰吕子胜
Owner SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND
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