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Technology for improving petroleum coke desulfurization efficiency in ammonia gas atmosphere

A technology of desulfurization efficiency and petroleum coke, which is applied in the field of desulfurization process, can solve problems such as complex operation process, achieve the effect of improving desulfurization efficiency, reducing environmental pressure, and high desulfurization rate

Inactive Publication Date: 2015-11-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The operation process of this scheme is complicated, and it is different from the ammonia atmosphere desulfurization of this patent application

Method used

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  • Technology for improving petroleum coke desulfurization efficiency in ammonia gas atmosphere
  • Technology for improving petroleum coke desulfurization efficiency in ammonia gas atmosphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 2 As shown, the selected raw material is 5g of a domestic high-sulfur petroleum coke (sulfur content is 6.5wt%), which is crushed by crushing 3 to below 1mm and sent to the high-temperature fluidized bed 5 through the petroleum coke feeding device 4, and the bottom is fed into The ammonia gas preheated by the heater 2 is heated for desulfurization. After desulfurization, the petroleum coke enters the desulfurization coke storage tank 6, and the high-temperature flue gas is passed into the flue gas absorption tower 7 for desulfurization treatment and then mixed with ammonia gas, and 8 is a heating and heat preservation component. Experimental conditions for fluidized heating desulfurization treatment: the temperature of the high-temperature fluidized bed is 800°C, the petroleum coke stays in the fluidized bed for 10 minutes, and the flow rate of ammonia gas is 10m / s. The high-temperature fluidized bed has a gas preheating device, and the preheating tempe...

Embodiment 2

[0035] The residence time of petroleum coke in the fluidized bed is controlled at 30min in embodiment 1, all the other are identical with embodiment 1. Finally, the sample was taken out and weighed, and the desulfurization rate was found to be 91.46%.

Embodiment 3

[0037] In Example 1, the desulfurization temperature was controlled at 900°C, the ammonia preheating temperature was controlled at 700°C, and the rest were the same as in Example 1. Finally, the samples were taken out for sulfur measurement, and the desulfurization rate was found to be 93.37%.

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Abstract

The invention discloses a technology for improving the petroleum coke desulfurization efficiency in an ammonia gas atmosphere. The technology comprises the following steps: grinding petroleum cokes, then delivering the petroleum cokes to a high-temperature fluidized (ammonia gas) atmosphere furnace, wherein in the furnace, the petroleum coke particles are heated and are in a boiling state at the same time, so the petroleum coke particles have an enough contact surface with the desulfurizer (ammonia gas), taking out the petroleum cokes after the desulfurization; preheating the ammonia liquid to generate high-temperature ammonia gas with a temperature of 500 to 700 DEG C, and introducing the ammonia gas into fluidized equipment at a flow speed of 1 to 40 m / s. The petroleum cokes are grinded and sieved to form particles with a size smaller than 1 mm; then the particles are fed into high-temperature fluidized equipment with a temperature of 700 to 900 DEG C through a feeding device, and then ammonia gas is introduced into the equipment, and the petroleum coke is fluidized and desulfurized by the ammonia gas flows. After fluidized calcination within 30 minutes, the petroleum cokes are fed into a desulfurized coke tank. The technology and equipment are optimized on the basis of ammonia gas calcination and desulfurization so as to further shorten the desulfurization time and obtain a higher desulfuration rate.

Description

technical field [0001] The invention relates to a desulfurization process of fluidized calcined petroleum coke under an ammonia atmosphere, which is applied in the technical fields of metallurgy, materials, chemical industry and environmental protection. Background technique [0002] Petroleum coke is the main by-product of the petroleum refining industry and is generally produced by the delayed coking process. Because of its low ash content and high fixed carbon content, petroleum coke is widely used in metallurgy, materials and chemical industries. At the same time, due to the different sulfur content in petroleum coke, petroleum coke is divided into high sulfur (>4%), medium sulfur (2~4%) and low sulfur coke (<2%). However, with the deterioration and acidification of international crude oil, the quality of petroleum coke, a by-product of petroleum refining, is gradually decreasing, especially the sulfur content in petroleum coke is constantly increasing. Excessive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02
Inventor 肖劲仲奇凡张燕冰余柏烈王炳杰
Owner CENT SOUTH UNIV
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