Method and device for coupling and biologically purifying VOCs under optical/thermal double-driving catalysis

A biological purification and dual-drive technology, which is applied in the field of environmental pollution purification, can solve the problems of adsorbent regeneration, difficult continuous operation of the process, and inability to realize waste gas, so as to improve energy utilization rate, strong technical applicability, and realize mineralization Effect

Pending Publication Date: 2017-02-22
ZHEJIANG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the problems that the current low-temperature plasma coupled biological method for treating VOCs cannot achieve complete purification of waste gas, secondary pollution, adsorbent needs to be regenerated, and the process is difficult to operate continuously, a biochemical method that improves gas output is proposed. properties, so that it is completely mineralized in the biological purification unit, and there is no secondary pollution. The method and device of light / heat dual-drive catalytic coupling biological purification of VOCs exhaust gas

Method used

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  • Method and device for coupling and biologically purifying VOCs under optical/thermal double-driving catalysis
  • Method and device for coupling and biologically purifying VOCs under optical/thermal double-driving catalysis
  • Method and device for coupling and biologically purifying VOCs under optical/thermal double-driving catalysis

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Experimental program
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Effect test

Embodiment 1

[0037] Embodiment 1 A method for optical / thermal dual-drive catalytic coupling biological purification of VOCs exhaust gas, characterized in that:

[0038] 1) Adjust the humidity of the VOCs exhaust gas to be purified, and control the humidity of the VOCs exhaust gas to be purified at 50%-80%;

[0039] 2) According to whether the VOCs exhaust gas with a specific humidity contains refractory components (such as VOCs containing benzene rings, VOCs containing chlorine atoms, etc.), selectively adjust the gear position of the three-way gas reversing valve so that the VOCs exhaust gas with a specific humidity enters the Main road system (containing difficult biodegradable components) or bypass system (excluding difficult biodegradable components), wherein said main road system communicates with low-temperature plasma-driven photo / thermal catalytic unit, and bypass system communicates with biological filler Reactor communication;

[0040] 3) For the VOCs exhaust gas with a specific...

Embodiment 2

[0044] Example 2 A device constructed according to the method of photo / thermal dual-drive catalytic coupling biological purification of VOCs exhaust gas described in Example 1, including a humidity adjustment device 1, a photo / thermal dual-drive catalytic unit 2 and a biological purification unit 3, the The air inlet of the humidity adjusting device 1 is connected with the exhaust gas source 4 to be purified, the air outlet of the humidity adjusting device 1 is connected with the air inlet of the three-way gas reversing valve 11, and the The first gas outlet of the three-way gas reversing valve 11 communicates with the air inlet pipeline of the light / heat dual-drive catalytic unit 2 through the main road system, and the second gas outlet of the three-way gas reversing valve 11 , The air outlets of the light / heat dual-drive catalytic unit 2 are all connected with the air inlet pipeline of the biological purification unit 3;

[0045] The photo / thermal dual-driven catalytic unit ...

Embodiment 3

[0050] Example 3: Preparation of Light / Heat Dual Drive Catalyst

[0051] Preparation of Copper-Manganese Composite Oxide Catalyst

[0052] Take 2g of MnCO 3 placed in a muffle furnace at O 2 Calcined at 400 °C for 5 h in the atmosphere to prepare porous MnO 2 spare. Take 0.38g Cu(NO 3 ) 2 ·3H 2 O, dissolved in 2mL of deionized water, weighed 1.0gMnO 2 Add while stirring, dry at 80°C for 12h, 400°C 2 Calcined in the atmosphere for 2h, cooled and taken out to obtain 40% CuO / MnO 2 .

[0053] Preparation of Noble Metal Silver-Titanium Composite Catalyst

[0054] Weigh 0.075g of AgNO 3 Dissolve in 100mL of deionized water, and after the solid is completely dissolved, wash with glacial acetic acid (CH 3 COOH) will AgNO 3 The pH of the solution was adjusted to about 2.5, and then transferred to a three-neck flask, and 21 mL of butyl titanate (Ti(OC 4 h 9 ) 4 ) into the above solution at a rate of about 3 s / drop, and continue to stir for 3 hours after the drop is compl...

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Abstract

The invention relates to a method and a device for coupling and biologically purifying VOCs under optical / thermal double-driving catalysis. The method comprises the following steps: introducing VOCs waste gas into a main path system or a by-path system, wherein the main path system is communicated with a low-temperature plasma driving optical / thermal catalysis unit and the by-path system is communicated with a biological filler reactor; and then introducing the VOCs waste gas into a biological purification unit to be mineralized completely. The device comprises a humidity adjusting unit, the optical / thermal double-driving catalysis unit and the biological purification unit, wherein the gas inlet of the humidity adjusting device is communicated with a to-be-purified waste gas source through a pipeline; the gas outlet of the humidity adjusting device is communicated with the gas inlet of a three-way gas reversing valve through a pipeline; a first gas outlet of the three-way gas reversing valve is communicated with the gas inlet of the optical / thermal double-driving catalysis unit through a pipeline; and a second gas outlet of the three-way gas reversing valve and the gas outlet of the optical / thermal double-driving catalysis unit are communicated with the gas inlet of the biological purification unit through pipelines. The method and the device have the beneficial effects of high removal efficiency and good purification effect.

Description

technical field [0001] The invention relates to a method and device for optical / thermal dual-drive catalytic coupling biological purification of VOCs, which belong to the field of environmental pollution purification. Background technique [0002] Volatile Organic Compounds (Volatile Organic Compounds, VOCs) are important precursors of ozone and secondary organic particulate matter, and play an extremely important role in the process of atmospheric chemical reactions. Related pollution control technologies have become research and development hotspots in the field of air pollution control. [0003] VOCs exhaust gas purification technology can be simply divided into two categories: recovery method and destruction method. For high concentration VOCs exhaust gas (>5000mg / m 3 ), technology such as condensation (cryogenic cooling) should be preferred to recycle the organic compounds in the exhaust gas. For medium and low concentration VOCs exhaust gas (<5000mg / m 3 ), it ...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/86B01D53/44B01D53/88B01D53/84B01D53/85B01J23/889B01J23/50
CPCB01D53/32B01D53/75B01D53/84B01D53/85B01D53/8687B01D53/88B01J23/002B01J23/50B01J23/8892B01D2259/818B01D2257/708Y02A50/20
Inventor 王家德成卓韦王霞徐丹华
Owner ZHEJIANG UNIV OF TECH
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