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Technique method of producing high-quality coke by residual oil or medium and low temperature coal tar

A low-temperature coal tar, high-quality coke technology, applied in the fields of oil refining, coal chemical industry, and petrochemical industry, can solve the problems of insufficient optimization of operating conditions and energy utilization, and achieve the effect of reducing energy consumption, reducing investment and simplifying the process flow

Active Publication Date: 2015-04-15
SINOPEC NANJING ENG & CONSTR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two processes simply combine the traditional residue hydrogenation and delayed coking processes, which are not optimized in terms of operating conditions and energy utilization

Method used

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  • Technique method of producing high-quality coke by residual oil or medium and low temperature coal tar

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Experimental program
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Effect test

Embodiment 1

[0041] In this embodiment, the vacuum residue A is used as the raw material, and the operation is carried out by organically combining the three units of residue hydrotreatment-delayed coking-PSA purification. After the vacuum residue passes through the hydrotreating unit, all products of the hydrotreating are directly sent to the delayed coking unit without separation. In the delayed coking unit, the residual oil after hydrogenation first enters the waste heat recovery device to exchange heat with the flue gas from the heating furnace, and then enters the coking heating furnace, coke tower and fractionation tower in turn after heat exchange. The fractionation tower sequentially obtains overhead gas, diesel oil and wax oil, and the overhead gas is separated by an oil-gas separator to obtain coke dry gas and gasoline. Coking dry gas enters the PSA purification unit after desulfurization, and the PSA purification unit adopts a 10-2-4 process (10 adsorption beds, 2 bed inlets, 4 ...

Embodiment 2

[0045] In this example, the vacuum residue B is used as the raw material, and the process method adopted is the same as in Example 1. The operating conditions, product distribution and coke properties are shown in Tables 3, 4 and 5, respectively.

[0046] Comparing the results of the invention, it can be seen that the method of organically combining the three units of residual oil hydrotreating-delayed coking-PSA purification can increase the yield of gasoline and diesel by 13.6% and 15% respectively, and the properties of coke have been significantly improved; the process of the present invention Compared with conventional residual oil hydrogenation and delayed coking processes, it can save energy by 30%.

[0047] Table 1 Properties of vacuum residue

[0048] Raw oil number Vacuum residue A Vacuum residue B Density at 20°C, g / cm 3 1.06 0.98 S content, m% 6.01 1.39 N content, m% 0.78 1.02 Carbon residue, m% 24.74 13.95 Metal (Ni+...

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Abstract

The invention discloses a technique method of producing high-quality coke by residual oil or medium and low temperature coal tar. The technique method comprises the steps that: raw oil and hydrogen are mixed and then enter a hydrogenation treatment unit; hydrogenation reaction is performed in the presence of a hydrogenation catalyst; all products subjected to hydrogenation treatment enter a delayed coking unit without separation; thermal cracking reaction is performed; the high-quality coke is produced; tower top oil gas obtained from a coke tower of the delayed coking unit is fractionated to separate out tower top gas, diesel oil and wax oil; the tower top gas is subjected to gas-oil separation to obtain gasoline and coked dry gas; the coked dry gas is desulfurized and then enters a PSA (Pressure Shift Adsorption) purification unit; the obtained hydrogen returns to the hydrogenation treatment unit for recycling. The method can be used for increasing the yield of light oil, obtaining clean product oil and producing the high-quality coke, and has the significant advantage of reducing the energy consumption.

Description

technical field [0001] The invention belongs to the fields of oil refining, petrochemical industry and coal chemical industry, and relates to a new process for producing high-quality coke from residual oil / medium and low temperature coal tar, more specifically, a method of hydrogenating residual oil / medium and low temperature coal tar, delaying Coking and PSA purification are organically combined to produce high-quality coke. Background technique [0002] Coke is a black or dark gray porous solid with metallic luster, the main component of which is carbocyanine. In recent years, due to the wide use of high-quality coke in metallurgy, non-ferrous metals, national defense, medical treatment, aerospace and atomic energy, the status of coke as a by-product of delayed coking has been changed; at the same time, higher requirements have been put forward for the quality of coke. [0003] Delayed coking process is simple, mature technology, low investment and operating costs, strong...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/06
Inventor 张凤娇郑战利陈金樑崔保顺王楠芦霄然史锡才
Owner SINOPEC NANJING ENG & CONSTR
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