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Integrated ammonia-process desulfurization method of various acidic gases in oil refining device

A technology for ammonia desulfurization and oil refining equipment, which is applied to chemical instruments and methods, separation methods, and hydrocarbon oil treatment, and can solve problems such as difficulty in meeting national emission requirements, complicated treatment processes, and waste liquid discharge, and achieve significant environmental benefits. and social benefits, the process is simple, and the effect of not increasing carbon dioxide emissions

Active Publication Date: 2015-12-09
JIANGSU NEW CENTURY JIANGNAN ENVIRONMENTAL PROTECTION
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to solve the shortcomings or deficiencies such as complex treatment process, high cost, waste liquid discharge, and difficulty in meeting the new national emission requirements in the FCC flue gas, incineration flue gas, and regeneration flue gas desulfurization methods of the refinery unit.

Method used

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  • Integrated ammonia-process desulfurization method of various acidic gases in oil refining device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 15t / h crude oil is often decompressed to obtain 1.9t / h light oil, 10t / h heavy oil, sour water and solvent, and 10t / h heavy oil enters the catalytic cracking unit to obtain 3.1t / h FCC oil with S content of 600ppm, 2.4t / hS FCC oil with 125ppm content, 12600Nm 3 / h, SO 2 The FCC flue gas with a concentration of 0.3% is treated by three-stage cyclone dust removal and SCR denitrification, 3.1t / h FCC oil with a S content of 600ppm and light oil with a 1.9t / h and 1000ppm hydrogenation unit are used to obtain 4.4t / h S content of 30ppm Hydrogenated oil is used as refined oil, sour water produced by atmospheric pressure and hydrogenation, and solvent sulfur recovery unit, after treatment, 5Nm 3 / h Tail gas with sulfide content of 1.2%, incinerated at 840-880°C, flue gas residence time 1.5-2.7s, 7.5Nm after incineration 3 / h, SO 2 Incineration flue gas with concentration of 0.8%, hydrogen sulfide and organic sulfur content of 4.7ppm. 2.4t / h FCC oil with 125ppm S content was re...

Embodiment 2

[0040] 80t / h crude oil is often decompressed to obtain 15t / h light oil, 50t / h heavy oil, sour water and solvent, and 50t / h heavy oil enters the catalytic cracking unit to obtain 15t / h FCC oil with S content of 6200ppm, 12t / h FCC oil with S content of 325ppm FCC oil, 63000Nm 3 / h, SO 2 The FCC flue gas with a concentration of 0.4% is treated by two-stage cyclone dust removal and SNCR denitrification, and the FCC oil product with a S content of 15t / h of 6200ppm and the light oil with a S content of 15t / h of 2700ppm are processed by a hydrogenation unit to obtain a hydrogenated oil with a S content of 27t / h of 42ppm Products, acid water produced by atmospheric pressure and hydrogenation, and solvent sent to the sulfur recovery unit, through the sulfur recovery unit to obtain 382Nm 3 / h Tail gas with sulfide content of 1.2%, incinerated at 800-850°C, flue gas residence time 2.5-3.6s, after incineration to obtain 762Nm 3 / h, SO 2 Incineration flue gas with a concentration of 0.6...

Embodiment 3

[0042] 160t / h crude oil is often decompressed to obtain 48t / h light oil, 100t / h heavy oil, acid water and solvent, and 100t / h heavy oil enters the catalytic cracking unit to obtain 32t / h FCC oil with S content of 3200ppm, 25t / h FCC oil with S content of 425ppm FCC oil, 120000Nm 3 / h, SO 2 The FCC flue gas with a concentration of 0.35% is treated with two-stage cyclone dust removal and SNCR denitrification, and 32t / h of oil with a S content of 3200ppm and 48t / h of light oil are hydrogenated to obtain 67t / h of hydrogenated oil with a S content of 15ppm. The sour water and solvent produced by pressure and hydrogenation are sent to the sulfur recovery unit, and the sulfur recovery unit can obtain 2650Nm 3 / h tail gas with a sulfide content of 1.35%, incinerated at 810-900°C, the residence time of flue gas is 1.1-2.9s, and 4240Nm is obtained after incineration 3 / h, SO 2 Incineration flue gas with a concentration of 0.844% and a hydrogen sulfide and organic sulfur content of 6.3...

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Abstract

An integrated ammonia-process desulfurization method of various acidic gases in an oil refining device includes the following steps: (1) preparing heavy oil, light oil, acidic liquid and solvents through an atmospheric and vacuum distillation unit from crude oil, and feeding the heavy oil into a catalytic cracking device, the light oil into a hydrogenation device, and the acidic liquid and the solvents into a sulfur recovery combined device; (2) mixing a part of FCC oil, which is produced through the catalytic cracking device, with the light oil and feeding the mixed oil into the hydrogenation device to produce hydrogenated oil, the acidic liquid and solvents, wherein a part of the hydrogenated oil is fed into an adsorption device while the other part of the hydrogenated oil is stored and marketed as product oil; (3) feeding the acidic liquid and solvents and the acidic liquid and solvents prepared from the atmospheric and vacuum distillation unit into the sulfur recovery combined device to produce sulfur, and feeding the tail gas into an incineration unit for incineration to obtain incinerated flue gas; (4) feeding a part of the FCC oil which is produced in the catalytic cracking device into the adsorption device, performing adsorption desulfurization, and feeding an adsorption catalyst into a regenerative device to regenerate the adsorption catalyst in an oxidizing manner to obtain regenerated flue gas; and (5) feeding the FCC flue gas, the incinerated flue gas and the regenerated flue gas into an ammonia absorption device to perform absorption desulfurization and discharging cleaned flue gas after the flue gas meets standard.

Description

1. Technical field [0001] The invention relates to an integrated ammonia desulfurization method for various acid gases in an oil refinery, which is characterized in that the regeneration flue gas, FCC flue gas, and incineration flue gas of adsorption desulfurization are introduced into an ammonia absorption device for integrated desulfurization treatment, so that the clean smoke The gas meets the national standard and discharges up to the standard. It can not only recycle sulfur resources, but also avoid environmental pollution. The method developed by NH 3 and SO 2 Based on the reaction, in the multifunctional desulfurization absorption tower, ammonia converts SO in the tail gas 2 Absorb the solution of ammonium (hydrogen) sulfite, an intermediate product of desulfurization, and blow it into air to directly oxidize ammonium (hydrogen sulfite) into ammonium sulfate. It is currently used for gasoline adsorption desulfurization regeneration flue gas, FCC flue gas, and sulfur ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/50C10G69/00C01C1/24C01B17/02
CPCY02P20/584
Inventor 黄海张军谭强罗勇迎王甫来
Owner JIANGSU NEW CENTURY JIANGNAN ENVIRONMENTAL PROTECTION
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