Comprehensive Utilization Process of Petroleum Coke Calcination

A petroleum coke and calcination technology, which is applied in the field of petroleum coke calcination comprehensive utilization process, can solve the problems of insufficient exhaust gas preheating, unstable product quality, insufficient strength, etc., and achieve energy utilization rate improvement, increase strength, and increase true density Effect

Active Publication Date: 2016-08-24
SHANDONG YUJIA ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, petroleum coke is calcined through calciners or rotary kilns, but there are defects such as insufficient exhaust gas preheating and unstable product quality, such as insufficient strength and high sulfur content.

Method used

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  • Comprehensive Utilization Process of Petroleum Coke Calcination
  • Comprehensive Utilization Process of Petroleum Coke Calcination
  • Comprehensive Utilization Process of Petroleum Coke Calcination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A petroleum coke calcination comprehensive utilization process, the steps of which are:

[0022] (1) Separately crush different types of petroleum coke to a particle size of 5-30mm, and then remove iron,

[0023] (2) Blending different types of petroleum coke to obtain mixed petroleum coke, the ash content of the mixed petroleum coke after blending is not more than 0.4%, and the volatile matter is controlled at 10.5-11%; 0.005-0.01% of mixed rare earths, 0.005-0.006% of its weight silicon carbide; the mixed rare earths are composed of yttrium, berkelium and lanthanum, and the mass ratio of the three is 1: (0.1-0.15): (0.25-0.30 ); the silicon carbide is selected from α-SiC particles with a particle size of 5-10 μm;

[0024] (3) The blended mixed petroleum coke is intermittently or continuously introduced into the eight-layer down-flow pot calciner through the top feeding mechanism. The down-flow pot calciner includes refractory bricks (silica bricks) The outer furnace...

Embodiment 2

[0028] Other steps remain unchanged, the difference from Example 1 is that in step 1, the petroleum coke is crushed to a particle size of 5-10mm.

Embodiment 3

[0030]Other steps remain unchanged, and the difference from Example 1 is that the refractory bricks are made through the following steps: 30-35 parts by weight of Portland cement, 18-21 parts by weight of fly ash, 14-16 parts by weight of Silicon carbide, 20-25 parts by weight of alumina, 5-10 parts by weight of magnesium oxide, 5-6 parts by weight of silicon dioxide, 3-5 parts by weight of vermiculite powder, 2-4 parts by weight of zirconia, 1-2 Parts by weight of graphite and 0.5-1 part by weight of titanium dioxide are mixed into a mixed powder, and then a binder accounting for 5-6% of the total weight of the mixed powder is added. After forming by a hydraulic press, it is dried and sintered to obtain a finished product. The temperature of sintering is controlled At 1420-1450°C, the time is 2-3 hours. It has been tested that the refractoriness of this refractory brick reaches 1750-1800°C, which is higher than the 1690-1710°C of conventional silica bricks, and when heated fr...

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Abstract

A petroleum coke calcination comprehensive utilization process, comprising the following steps: (1) crushing petroleum cokes of different types, and then removing iron, (2) blending different types of petroleum cokes to obtain mixed petroleum cokes, blending The ash content of mixed petroleum coke after blending is not more than 0.4%, and the volatile matter is controlled at 10.5-11%; and mixed rare earths accounting for 0.005-0.01% by weight and silicon carbide accounting for 0.005-0.006% by weight are added to the mixed petroleum coke; (3) The blended mixed petroleum coke is introduced into an eight-layer downstream tank calciner for calcination in isolation from the air. During the calcination process, the volatile matter produced is used as fuel, and the high-temperature flue gas enters the waste heat boiler for power generation. The present invention controls the volatile matter content of petroleum coke by adjusting the mixing ratio of different types of petroleum coke, so that the calcination process of petroleum coke can be completed only through volatile matter during calcination, and the flue gas produced by combustion is preheated to air After entering the boiler for power generation, the recycling rate of resources is greatly improved, and the ultimate goal of energy saving and emission reduction is achieved.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of solid waste, in particular to a process for comprehensive utilization of petroleum coke calcining. Background technique [0002] Petroleum coke is a by-product in the petroleum refining process, and its form varies with the process, operating conditions and feed properties. Petroleum coke produced from petroleum coke factories is called green coke, which contains some volatile components of uncarbonized hydrocarbons. Green coke can be used as fuel-grade petroleum coke. If it is used as an anode for aluminum smelting or for steelmaking Electrodes need to be calcined at high temperature to complete carbonization and reduce volatile matter to a minimum. At present, petroleum coke is calcined through calciners or rotary kilns, but there are defects such as insufficient exhaust gas preheating and unstable product quality, such as insufficient strength and high sulfur content. Contents of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66F23L15/00F22B1/18
CPCY02E20/34
Inventor 巴爱民巴爱国袁慧星
Owner SHANDONG YUJIA ADVANCED MATERIALS CO LTD
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