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Method for absorbing and recovering high-concentration oil vapor

An adsorption recovery, high-concentration technology, applied in the field of oil and gas recovery, can solve problems such as affecting the use of adsorbents and low adsorption rate, and achieve the effects of low-cost recovery, high-efficiency utilization, and stable emission standards.

Inactive Publication Date: 2010-09-08
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of low adsorption rate and affecting the use of adsorbents in the existing recovery of high-concentration oil and gas, the present invention provides a method for adsorption and recovery of high-concentration oil and gas, which can recover high-concentration oil and gas with high efficiency and low cost, so that the oil and gas The discharge of pollutants is stable and up to standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First, put 1g of NDA-1800 resin in the lower part of the Φ0.8cm×20cm glass adsorption column, and put 0.5g of NDA-150 resin in the upper part;

[0024] Then, the gasoline vapor (oil gas) obtained by the bubbling method (the oil gas concentration is about 830g / m 3 , the concentration is calculated by carbon), the oil gas is passed into the glass adsorption column from the lower inlet for adsorption, the adsorption temperature is controlled at 25°C, the gas flow rate is 250mL / min, and the oil gas concentration at the outlet of the adsorption column reaches 25g / m 3 When the adsorption is stopped, the working adsorption capacity is 512mg / g, and the recovery rate is 97%;

[0025] Finally, vacuum desorption is performed on the adsorbent that has adsorbed oil and gas at room temperature and a vacuum degree of 0.097 MPa, and the adsorbent recovers its adsorption capacity after desorption.

Embodiment 2

[0027] Step is the same as implementation example 1, but the NDA-1800 resin in the step is replaced by NDA-1600 resin, other conditions are unchanged, the working adsorption capacity is 509mg / g, and the recovery rate is 97%.

Embodiment 3

[0029] The steps are the same as in Example 1, but the NDA-1800 resin in the steps is replaced by XAD-4 resin, and other conditions are unchanged, the working adsorption capacity is 511mg / g, and the recovery rate is 97%.

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PUM

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Abstract

The invention discloses a method for absorbing and recovering high-concentration oil vapor, which belongs to the technical field of oil vapor recovery, and comprises the following steps that: the high-concentration oil vapor flows through an absorption column filled with a mesopore absorbent and micropore absorbent double-layer fixed bed under normal temperature and normal pressure, the mesopore absorbent is arranged at the lower part of the absorption column, and the micropore absorbent is arranged at the upper part of the absorption column; and the absorbent absorbing organic substances is vacuumized and desorbed, and the desorbed oil vapor is condensed or absorbed and then returns to an oil tank. The concentration of the oil vapor at an outlet of the absorption column processed by the invention can be reduced to 25g / cm3, which can achieve the national control standard of oil vapor pollutant emission; and the oil product returning to the oil tank continues to be used, and the oil vapor recovery rate reaches more than 93 percent. According to the characteristics of the high-concentration oil vapor, the invention develops a double-layer fixed bed absorption process combined by the mesopore high molecular polymer absorbent and the micropore absorbent, and the high absorption capacity of the mesopore absorbent and the high absorption efficiency of the micropore absorbent are coupled, thereby achieving the efficient utilization of the high-concentration oil vapor.

Description

technical field [0001] The invention relates to a method for recovering oil and gas, more specifically a method for recovering oil and gas by means of adsorption. Background technique [0002] Petroleum, petrochemical, transportation and other fields, because gasoline and other light oil products are very easy to volatilize in the process of production, storage, transportation, sales and use, resulting in serious oil evaporation loss. Oil resources are as high as millions of tons. The direct discharge of this kind of oil evaporation not only brings serious environmental pollution, but also brings fire hazards to enterprises, and causes the loss of oil quantity and quality decline. The escaped oil gas is still the main component of photochemical smog, which seriously affects the atmospheric environment. [0003] During the storage and transportation of oil products, high-concentration oil and gas with a concentration of more than 30% (volume fraction) will generally be produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04
Inventor 龙超于伟华吴剑章亮史嘉璐李爱民张全兴
Owner NANJING UNIV
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