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Method for cryogenic cooling absorbing-regenerative oxidation recovery and treating oil air

A technology of cooling absorption and heat storage, which is applied in solvent recovery, gas purification, and petrochemical fields. It can solve problems such as uneconomical and non-standard gas discharge, and achieve the effects of small footprint, outstanding comprehensive economy, and large operating flexibility.

Inactive Publication Date: 2007-09-05
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Condensation method, absorption method, adsorption method, and membrane separation method have industrial application cases at home and abroad. The common problem is that the treated gas either fails to meet the standard discharge, or barely meets the standard but is uneconomical.

Method used

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  • Method for cryogenic cooling absorbing-regenerative oxidation recovery and treating oil air

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take benzene-containing oil and gas as an example: oil and gas are collected through a closed loading system, pass through a flame arrester (Q01), and enter the absorption tower (C01) from the bottom of the absorption tower. The temperature is normal temperature, the pressure is 3000-5000Pa, and the benzene concentration is about 180g / Nm 3 (20°C). In the absorption tower (C01), it is fully countercurrently contacted with the absorption liquid kerosene at about 10°C, and then discharged from the top of the tower. The absorption rate of benzene in oil and gas is greater than 90%, and the concentration of benzene in the tower is about 18g / Nm 3 , temperature 10 ~ 15 ℃, pressure loss of about 1000Pa. The oil and gas coming out of the tower enter the thermal storage and oxidation section through the flame arrester (Q02), and after being diluted with fresh air 5 times the air volume, the oil and gas concentration is about 4g / Nm 3 , the temperature is close to normal temperat...

Embodiment 2

[0023] Take gasoline oil and gas as an example: the concentration of gasoline is about 700g / Nm 3 (20°C). After full countercurrent contact with the absorption liquid kerosene at about 10°C in the absorption tower, it is discharged from the top of the tower. The absorption rate of gasoline in oil and gas is greater than 80%, and the concentration of gasoline out of the tower is about 140g / Nm 3 . The oil and gas coming out of the tower enter the thermal storage oxidation section through the flame arrester (Q02), and after being diluted with fresh air 10 times the air volume, the oil and gas concentration is about 14g / Nm 3 , the temperature is close to normal temperature, it is preheated through the heat storage bed in the heat storage oxidizer (R01), and the oil gas is completely oxidized in the oxidation chamber, and the concentration is less than 100mg / Nm 3 , the temperature is 700°C, after the gas stays in the oxidation chamber for about 1.0 seconds, it passes through anot...

Embodiment 3

[0025] Take butanone oil and gas as an example: the concentration of gasoline is about 130g / Nm 3 (20°C). After full countercurrent contact with the absorption liquid kerosene at about 10°C in the absorption tower, it is discharged from the top of the tower. The absorption rate of gasoline in oil and gas is greater than 90%, and the concentration of gasoline out of the tower is about 13g / Nm 3 . The oil and gas coming out of the tower enter the thermal storage oxidation section through the flame arrester (Q02), and after being diluted with fresh air twice the air volume, the oil and gas concentration is about 6.5g / Nm 3 , the temperature is close to normal temperature, it is preheated through the heat storage bed in the heat storage oxidizer (R01), and the oil gas is completely oxidized in the oxidation chamber, and the concentration is less than 100mg / Nm 3 , the temperature is 700°C, after the gas stays in the oxidation chamber for about 2.5 seconds, it passes through another...

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Abstract

A method for recovering and treating the oil vapor generated during loading or unloading light oil by low-temp cooling-absorbing and oxidizing by accumulated heat includes such steps as absorbing the raw oil vapor by absorbing liquid and filler layer in absorption tower, heating in heat-accumulating oxidizing unit, high-temp oxidizing for decomposing to release a lot of heat, cooling by heat-accumulating bed, exhausting, and refrigerating by accumulated heat for cooling the absorbent.

Description

technical field [0001] The invention belongs to the fields of gas purification, solvent recovery and petrochemical industry. In particular, it relates to a low-temperature cooling absorption-heat storage oxidation recovery and treatment method for oil gas generated during loading / unloading of light oil products. technical background [0002] Oil and gas vapors produced during loading / unloading, storage and transportation of petrochemical products include light hydrocarbons, benzene, toluene, xylene and other volatile organic compounds. The smell of evaporating oil and gas often makes people dizzy. Among them, benzene series compounds are identified as carcinogens by experts. Inhalation of a large amount of high-concentration benzene vapor in the human body can cause benzene poisoning. Mild cases manifest as excited or drunken state, photophobia, tears, blurred vision, dizziness, dizziness, headache, nausea, vomiting, staggering and other symptoms; severe cases suffer from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/00B01D53/18
Inventor 杨明德何开安党杰刘雪峰胡湖生毛昌伟王欣昌张黎明吴玉龙
Owner TSINGHUA UNIV
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