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Method for removing VOCs (Volatile Organic Chemicals) through microwave radiation synergistic double-liquid phase biological filtering tower

A technology of microwave radiation and biological filtration, applied in the field of air pollution environmental control, can solve the problems of human health hazards, poor water solubility, low VOCs removal efficiency, etc., and achieve the effect of improving load removal and mass transfer effect

Inactive Publication Date: 2018-02-16
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) Harm to human health
However, there are many shortcomings in the biological purification and filtration method, and the removal efficiency of VOCs with poor water solubility and difficult biodegradation is low. New method of biodegrading VOCs has important implications

Method used

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  • Method for removing VOCs (Volatile Organic Chemicals) through microwave radiation synergistic double-liquid phase biological filtering tower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The concentration of imported o-xylene is 550mg / m 3 , after the successful and stable operation of the biofiltration tower with film coating, the organic gas is passed into the microwave radiation device at an inflow speed of 1.5m 3 / min, control the microwave radiation heating time to 20s, and when the radiation energy is 119W, the organic waste gas heated by microwave radiation enters the double-liquid phase biological filtration tower, and when the residence time in the biological filtration tower is 27s, the double-liquid phase Spray liquid simethicone 100mL, other aqueous solutions 1900mL, Na 2 HPO 4 12H 2 O6400mg / L, KH 2 SO 4 1800mg / L, (NH 4 ) 2 SO 4 1650mg / L, MgSO 4 ·7H 2 O 196mg / L, H 3 BO 3 2.5mg / L, Na 2 MoO 4 ·H 2 O 3mg / L, Ca(NO 3 ) 2 4H 2 O 550mg / L, CuSO 4 ·5H 2 O 300mg / L, FeSO 4 ·7H 2 O 160mg / L, ZnSO 4 ·7H 2 O 15mg / L, MnSO 4 4H 2 O 15mg / L two-liquid-phase spraying liquid was sprayed 3 times a day, each time spraying 150mL, and the ...

Embodiment 2

[0031] The concentration of imported o-xylene is 700mg / m 3 , after the successful and stable operation of the biofiltration tower with film coating, the organic gas is passed into the microwave radiation device at an inflow speed of 1.5m 3 / min, control the microwave radiation heating time for 15s, and when the radiation energy is 300W, the organic waste gas heated by microwave radiation enters the double-liquid phase biological filtration tower, and when the residence time in the biological filtration tower is 40s, the double-liquid phase Spray liquid simethicone oil 200mL, other aqueous solutions 1800mL, Na 2 HPO 4 12H 2 O6800mg / L, KH 2 SO 4 2000mg / L, (NH 4 ) 2 SO 4 1800mg / L, MgSO 4 ·7H 2 O 198mg / L, H 3 BO 3 3mg / L, Na 2 MoO 4 ·H 2 O 4mg / L, Ca(NO 3 ) 2 4H 2 O 600mg / L, CuSO 4 ·5H 2 O 350mg / L, FeSO 4 ·7H 2 O 200mg / L, ZnSO 4 ·7H 2 O 18mg / L, MnSO 4 4H 2 O 18mg / L two-liquid-phase spraying liquid is sprayed twice a day, each spraying is 200mL, and the sp...

Embodiment 3

[0033] The concentration of imported o-xylene is 1000mg / m 3 , after the successful and stable operation of the biofiltration tower with film coating, the organic gas is passed into the microwave radiation device at an inflow speed of 1.5m 3 / min, control the microwave radiation heating time for 10s, and when the radiation energy is 500W, the organic waste gas heated by microwave radiation enters the double-liquid-phase biological filtration tower, and when the residence time in the biological filtration tower is 50s, the double-liquid-phase Spray liquid simethicone 300mL, other aqueous solutions 1700mL, Na 2 HPO 4 12H 2 O7200mg / L, KH 2 SO 4 2000mg / L, (NH 4 ) 2 SO 4 2200mg / L, MgSO 4 ·7H 2 O 200mg / L, H 3 BO 3 4mg / L, Na 2 MoO 4 ·H 2 O 5mg / L, Ca(NO 3 ) 2 4H 2 O 650mg / L, CuSO 4 ·5H 2 O 380mg / L, FeSO 4 ·7H 2 O 250mg / L, ZnSO 4 ·7H 2 O 22mg / L, MnSO 4 4H 2 O 22mg / L two-liquid phase spraying liquid is sprayed twice a day, 250mL each time, and the spraying liq...

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Abstract

The invention relates to a method for removing VOCs (Volatile Organic Chemicals) through a microwave radiation synergistic double-liquid phase biological filtering tower. According to the method, a microsyringe and an electromagnetic air compressor are respectively connected with a microwave radiation device inlet through pipelines; a thermocouple is accessed to an Fe3O4 wave absorption material of a microwave radiation device; a biological tower bottom gas inlet is connected with a microwave radiation device outlet; one end of a double-liquid phase spraying system is connected with a sprayingliquid inlet at the top of a biological filtering tower; nutrient substances are provided to microorganisms in the biological filtering tower from a double-liquid phase spraying liquid flowing in; acontainer in which the double-liquid phase spraying liquid is stored and a metering pump for providing power to a double-liquid phase spraying pipeline are arranged at the other end of the double-liquid phase spraying system; the microsyringe and the air compressor are powered on, then VOCs are mixed with the air, and at the same time a vacuum air sucking pump is powered on. By adopting the method, the biological filtering removal capacity is increased, and waste gases with relatively large VOC concentrations can be relatively rapidly removed.

Description

technical field [0001] The invention relates to air pollution environment treatment, a treatment method in the technical field of biological filtration and environmental pollution treatment, in particular to a method for removing difficult VOCs by using microwave radiation in cooperation with a two-liquid phase biological filtration tower. Background technique [0002] Volatile organic compounds (VOCs) refer to the general term of various volatile organic compounds emitted into the atmosphere by human activities and biological metabolism, and are common and ubiquitous pollutants in indoor and outdoor air. There are many kinds of VOCs, which can be roughly divided into 9 categories: aromatic hydrocarbons, unsaturated aliphatic hydrocarbons / cycloalkanes, saturated aliphatic hydrocarbons, halogenated hydrocarbons, aldehydes / ketones, fatty alcohols, fatty acids, lipids, and terpenes. The sources of VOCs are very extensive, mainly including natural sources and man-made sources. N...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/74B01D53/84B01D53/72
CPCB01D53/72B01D53/74B01D53/75B01D53/84B01D2257/708Y02A50/20
Inventor 王灿虎啸宇
Owner TIANJIN UNIV
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