Method for processing light hydrocarbons oxidation sweetening tail gas
A technology for oxidatively removing mercaptans and tail gas, applied in chemical instruments and methods, separation methods, and refining hydrocarbon oil, etc., can solve the problems of economic decline, economic impact, increase in operating costs, etc., to improve absorption rate and operation flexibility, The effect of improving the gas-liquid contact effect and reducing the scale of the equipment
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[0027] Example 1
[0028] Small laboratory experiments.
[0029] The one-stage pulse bubbling absorption tower is adopted, including a bubbling absorption zone, and the internal components of the absorption tower are determined according to the preferred data in the specific implementation. The thickness of the liquid layer in the bubbling absorption zone is 400mm, and the height of the spray section is 300mm. The absorbent is three different diesel fractions. After absorption, the exhaust gas is diluted with air and discharged.
[0030] Use air bubbling through gasoline fraction (distillation range 70~170℃) and petroleum ether (distillation range 30~60℃) to simulate oxidation sweetening tail gas, carry out absorption recovery test, gas inlet pressure is 0.1MPa (gauge pressure), absorption tower The outlet is normal pressure, and the results are shown in Table 1, Table 2, and Table 3. (Nm 3 (Indicating standard state cubic meters)
[0031] Table 1 The absorption effect of differen...
Example Embodiment
[0037] Example 2
[0038] The tail gas of gasoline oxidative desulphurization of a certain enterprise contains hydrocarbons 32v% (volume fraction, the same below), the exhaust temperature is 53℃, the oxygen content is 17v%, the pressure is 0.2MPa (gauge pressure), and the flow is 70Nm 3 / h or so. A three-stage pulse bubbling absorption tower is adopted, including three bubbling absorption zones and three spray absorption zones, and the internal components of the absorption tower are determined according to the preferred data in the specific implementation. The thickness of the liquid layer in the bubbling absorption zone is 350mm, and the height of the spray section is 250mm. The absorbent is catalytic diesel, and the liquid-gas ratio is 100L / m 3 , The operating temperature is 25-40°C. The absorbed catalyzed diesel and other catalyzed diesel enter the hydrogenation unit together, and the absorbed tail gas is led to the air cooler air inlet of the catalytic cracking unit.
[0039]...
Example Embodiment
[0040] Example 3
[0041] Same as Example 2, the exhaust gas after absorption treatment is about 50Nm 3 / h, the concentration of organic matter is about 20g / Nm 3 , The hydrocarbon emission rate is about 1kg / h. Dilute with air to a total hydrocarbon concentration of 50093000mg / Nm 3 , Adopting conventional heat storage combustion device to process, the purified gas meets the current national emission standards.
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