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System and method for recycling volatile organic compounds

A volatile organic compound, recovery and treatment technology, applied in gas treatment, separation methods, chemical instruments and methods, etc., can solve the problems of low absorption efficiency, slow pressure relief of oil storage tanks, and substandard exhaust gas.

Active Publication Date: 2016-07-20
NANJING TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still few application research and patents on nitrogen-permeable membranes. The oil and gas recovery device based on glassy membrane separation-absorption technology (application number: 201410342676.9) adopts nitrogen-prioritized glassy membrane integrated absorption technology to recover oil and gas; Two-stage membrane method oil and gas recovery device and its recovery method (application number: 201510278802.3) utilizes two-stage treatment of rubber state membrane and glass state membrane to achieve the purpose of VOCs purification, emission and recovery. The concentrated exhaust gas coming out of the remaining side of the glass state membrane also enters the The oil storage tank will cause the pressure release of the oil storage tank to be slow; its recovery is carried out in the form of an absorption tower, the absorption efficiency is low, and the exhaust gas from the absorption tower still has the problem of not meeting the standard

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  • System and method for recycling volatile organic compounds
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  • System and method for recycling volatile organic compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] In this example, the nitrogen separation membrane uses 2,6,14-triaminotriptycene and sebacoyl chloride as the main monomers for synthesis, pyridine as the acid-binding agent, and methylpyrrolidone as the solvent for the synthesis reaction. The specific steps are as follows: Add 1 mol of 2,6,14-triaminotriptycene, 3 mol of pyridine, and 2 mol of sebacoyl chloride into the methylpyrrolidone solution and stir to dissolve, and react for 3.5 hours at a temperature of 2°C (nitrogen protection). The homogeneous polycondensation mixed solution was coated on the polytetrafluoroethylene base film to prepare a composite membrane, and the coated composite membrane was dried in a vacuum oven at 70°C to obtain a tripterene-based VOCs interception polymer separation membrane. The average pore size of the tripterene-based VOCs interception polymer separation membrane prepared by BET test was 2.8nm.

[0076] The test conditions are: at 25°C, nitrogen / cyclohexane is used as the separatio...

Embodiment 2

[0079] In this example, the nitrogen separation membrane uses 2,7,14-triaminotriptycene and sebacoyl chloride as the main monomers for synthesis, pyridine as the acid-binding agent, and methylpyrrolidone as the solvent for the synthesis reaction. The specific steps are as follows: Add 1 mol of 2,7,14-triaminotriptycene, 5 mol of pyridine, and 3 mol of sebacoyl chloride into the methylpyrrolidone solution, stir and dissolve, and react for 3.5 hours at a temperature of 2°C (nitrogen protection). The homogeneous polycondensation mixed solution was coated on the polytetrafluoroethylene base film to prepare a composite membrane, and the coated composite membrane was dried in a vacuum oven at 70°C to obtain a tripterene-based VOCs interception polymer separation membrane. The average pore size of the tripterene-based VOCs interception polymer separation membrane prepared by BET test was 2.2nm.

[0080] The test conditions are: at 25°C, nitrogen / cyclohexane is used as the separation ...

Embodiment 3

[0083]In this example, the nitrogen separation membrane uses 2,3,6,7-tetrahydroxytripterene and 1,7-pimeloyl chloride as the main monomers for synthesis, pyridine as the acid-binding agent, and methylpyrrolidone as the solvent for the synthesis reaction. The specific steps are as follows: add 1.5 mol of 2,3,6,7-tetrahydroxytripene, 3 mol of pyridine, and 4.5 mol of 1,7-pimeloyl chloride into the methylpyrrolidone solution and stir to dissolve. Under the condition of 2°C (nitrogen protection), react for 3.5h, the homogeneous polycondensation mixed solution of the reaction is coated on the polytetrafluoroethylene base film to prepare a composite film, and the coated composite film is dried in a vacuum oven at 70°C. That is, a tripteryl VOCs interception type polymer separation membrane is obtained. The average pore size of the tripterene-based VOCs interception polymer separation membrane prepared by BET test was 2.0 nm.

[0084] The test conditions are: at 25°C, nitrogen / cyclo...

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Abstract

The invention discloses a system and a method for recycling volatile organic compounds, and belongs to the field of organic matter recovery. According to the method, dual aims of recovery of VOCs and up-to-standard treatment are achieved by adopting a nitrogen permselective isolation film and a condensation technology. The method is high in VOCs treatment efficiency, mild in operating condition and low in energy consumption; meanwhile, according to the application of the nitrogen permselective isolation film, VOCs leakage caused by equipment failures can be solved, the safety degree is high, and the method can be widely applied to the fields such as treatment of organized VOCs discharge process, such as discharge gas of petrochemical engineering technology, discharge gas of tank breathing valves and the like.

Description

technical field [0001] The invention belongs to the field of organic matter recovery, and in particular relates to a recovery and treatment system and method for volatile organic matter. Background technique [0002] Volatile organic compounds (VOCs) are one of the causes of haze weather and the main factor for the formation of ozone. Therefore, it is a key part of air pollution prevention and control. The country has also issued a variety of laws and regulations to strictly limit VOCs emissions. . [0003] For this reason, researchers have also developed two types of technologies: preventive treatment technology and terminal treatment technology to reduce VOCs emissions. The preventive treatment technology is to use green substances such as water to replace VOCs, and fundamentally solve the problem of VOCs emissions. However, due to limitations of technical factors, VOCs cannot be replaced in some processes, so their volatilization inevitably occurs. Therefore, the termi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/22B01D53/00
CPCB01D53/002B01D53/228B01D2257/708
Inventor 周浩力吕磊金万勤
Owner NANJING TECH UNIV