Oil gas absorptive reclaiming method and apparatus

Abstract

The invention relates the method and unit of oil gas absorption and recovery. The course of oil gas recovery comprises three parts: absorbing tower absorbing and separating, desorption tank desorbing and thickening and recovery tower absorbing and recovering. The unit comprises air-tight loading crane tube, accumulating equipment, absorption tower, dissolvent pump, desorption horizontal tank, vacuum pump, recovery tower, rich petrol pump, and lean petrol pump. In desorption horizontal tank there are 2-4 baffles, and the grade of slope of baffles is 0.01-0.02. On the baffles there are some low-weir plates, on the top of the baffles there are guide boards, and in the middle of the baffles there are permeability cells. At the exit of desorption horizontal tank there is demisting filler, and the bottom of it there is exit of absorbing agent. That the oil gas is absorbed and recovered at normal temperature and normal pressure is intermittent operation to save the cost of equipment investment and operation. The invention possesses high recovery ratio, and big operating flexibility. The treatment medium is the oil gas discharged at the course of convention oil accumulating.

Description

technical field [0001] The invention relates to the technical field of environmental protection and energy saving, in particular to a method and device for absorbing and recovering oil and gas. Background technique [0002] At present, the separation and recovery methods of oil gas and air include absorption method, adsorption method, condensation method and membrane separation method, etc., and some also include compression process or comprehensive utilization of several methods. The principles of various oil and gas recovery are different, and the technical and economic performances are also quite different. [0003] The adsorption method of oil and gas recovery method is to use the difference in the binding force between the components in the oil-air mixture and the adsorbent to separate the difficult-to-adsorb air components from the easily-adsorbed oil-gas components. At present, activated carbon and its modified substances (such as activated carbon fiber) are commonly...

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Problems solved by technology

The device is simple to operate, but there are some problems in the device: ①It can only be used inside the refinery with catalytic cracking unit, it is difficult to treat it as a complete set of independent equipment, and the scope of application is limited; ②Absorbent (light diesel oil) itself is light High-quality oil products have a low recovery rate (about 90%) and a large amount of volatilization loss, especially in summer; ③Light diesel oil cannot be regenerated, and it is only used for one-time use, and the consumption is large

It is found that there are many patents and reports on the recovery of oil and gas by activated carbon adsorption at home and abroad, while there are few reports on oil and gas recovery technology by absorption method

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