Three-top gas online desulphurization and pressurizing utilization method of atmospheric and vacuum distillation unit
A technology of atmospheric and vacuum device and head gas, applied in separation methods, chemical instruments and methods, hydrogen sulfide, etc., can solve the problems of unsolved hydrogen sulfide, peramine liquid foaming, unreachable, etc., and achieve no-circulation cooling The effect of low water consumption, low consumption of amine solution and low power consumption
Active Publication Date: 2012-04-18
ANHUI SHIHUA ENG & TECH
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This set of facilities reduced the hydrogen sulfide content of the decompression tower top gas from 200,000 ppm(v) to several hundred ppm(v), which did not meet the refining industry standard of hydrogen sulfide content in fuel gas≯100ppm(v); amine liquid The consumption has greatly exceeded the normal consumption of amine liquid; amine liquid foaming and amine running have occurred during operation; at the same time, the problem of hydrogen sulfide in the top gas of the initial distillation tower, the top gas of the atmospheric pressure tower, and the tail gas of the after condenser has not been solved. question
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[0023] The present invention adopts the preferred mode: firstly, utilizes the discharge pressure of the top gas of the primary distillation tower, adds on-line desulfurization and gas-liquid separation processes, and directly serves as fuel gas for the heating furnace of the device after reaching the standard. The second is to carry out separate online desulfurization treatment on the atmospheric pressure tower top gas, vacuum tower top gas and post-condenser tail gas respectively. The 300-600kPa (absolute) fuel gas used in the atmospheric pressure furnace and the decompression furnace is used as the working fluid, and the purified gas separated from the amine liquid tank is drained by the injector, mixed with the fuel gas, pressurized, and then enters the heating furnace of the atmospheric and decompression device Burn, and keep the pressure of the amine liquid tank at a slight negative pressure. The specific implementation is as follows:
[0024] 1. On-line desulfurization ...
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Abstract
The invention relates to a three-top gas online desulphurization and pressurizing utilization method of an atmospheric and vacuum distillation unit, which is used for solving the problems of high hydrogen sulfide content, high recycling cost, high point venting, and the like in primary distillation tower top gas, atmospheric pressure tower top gas, decompression tower top gas and post-condenser exhaust gas of the conventional atmospheric and vacuum distillation unit. The method comprises the following steps of: selecting amine atomization spray nozzles to be respectively arranged in the central position of a three-top gas conveying pipeline, automatically controlling the injection volume of each amine atomization spray nozzle by adopting a gas flowmeter signal, fully mixing atomized amineand gases, and removing hydrogen sulfide of gases per share; directly supplying desulphurized primary distillation tower top gas after rotational flow and liquid separation to a heating furnace in the atmospheric and vacuum distillation unit by utilizing the discharge pressure thereof; and carrying out drainage pressurization and mixing on desulphurized atmospheric pressure tower top gas, decompression tower top gas and post-condenser exhaust gas by adopting a fuel gas injector, and supplying to the heating furnace of the atmospheric and vacuum distillation unit, therefore, the harms caused by the hydrogen sulfide in three-top gases of the atmospheric and vacuum distillation unit are comprehensively and systematically solved, and the most cost-effective utilization of the atmospheric and vacuum distillation unit is achieved.
Description
technical field [0001] The invention relates to a method for online removal of hydrogen sulfide in a gas pipeline, in particular to a method for online desulfurization and pressurized utilization of "three top" gas in an atmospheric and vacuum device. Background technique [0002] During the production process of the atmospheric and vacuum unit, part of the sulfide in the crude oil is converted into hydrogen sulfide under high temperature conditions, and exists in the “three tops” gas of the atmospheric and vacuum unit (primary distillation tower top gas, atmospheric pressure tower top gas, decompression Tower top gas and post-condenser tail gas), the hydrogen sulfide content is as high as tens of thousands to hundreds of thousands of ppm (v). Hydrogen sulfide is extremely toxic. Wet hydrogen sulfide is extremely corrosive to carbon steel, and sulfur dioxide is generated after combustion, which will pollute the atmosphere; leakage and emission of gas containing hydrogen sulf...
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IPC IPC(8): B01D53/14C01B17/16
Inventor 陈群张志宏董月胜
Owner ANHUI SHIHUA ENG & TECH
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