Volatile organic compound contaminated groundwater restoration method

A technology of volatile organic compounds and repair methods, applied in chemical instruments and methods, water/sewage multi-stage treatment, degassed water/sewage treatment, etc., can solve the problem of difficult regeneration of activated carbon adsorbents, large amount of adsorbents, high repair costs, etc. problems, to achieve the effect of easy desorption regeneration, simple operation, and reducing the amount of adsorbent

Inactive Publication Date: 2013-03-27
江苏常环环境科技有限公司
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Problems solved by technology

[0004] A large number of researches and engineering examples at home and abroad have shown that activated carbon adsorbents have difficulty in regeneration and poor mechanical properties. When activated carbon adsorption is used to treat high VOCs polluted groun

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  • Volatile organic compound contaminated groundwater restoration method

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Embodiment 1

[0025] See figure 1 , the present embodiment adopts blow-off-resin adsorption combined process to remove volatile organic compounds in groundwater, including the following steps:

[0026] ① Pump out the groundwater polluted by volatile organic compounds from the pumping well, and filter it through a filter to remove some mechanical impurities in the groundwater, then enter the stripping tower from the top through the lift pump, spray down from the top of the tower, and flow down in the form of a film along the surface of the packing , flow in the opposite direction with the air entering the stripping tower from the bottom, and the water density in the control tower is 5-20m 3 / (m 2 h), the gas-water ratio is 5-20, so that the volatile organic compounds in the groundwater enter the gas phase to remove the volatile organic compounds in the groundwater. The stripping tower adopts a packed stripping tower, including a top gas collector and a stripping column, and the packing ado...

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Abstract

The present invention discloses a volatile organic compound contaminated groundwater restoration method, wherein a stripping-resin adsorption combination process is adopted to remove volatile organic compounds in groundwater. The method comprises the following steps that: (1) contaminated groundwater is extracted and filtered, and then enters a stripping tower from the top, such that the volatile organic compounds in the groundwater enter a gas phase; (2) stripping gas discharged from the top of the tower is collected through a top gas collector, and then is introduced into a gas phase adsorption column filled with an adsorption resin to carry out an adsorption treatment; (3) at a room temperature, the stripped groundwater in the step (1) is introduced in a liquid phase adsorption column filled with an adsorption resin to carry out a treatment; (4) recharging the treated groundwater in the step (3) to the groundwater layer; and (5) regenerating the adsorption resins in the step (2) and the step (3) by using a desorption agent, wherein the adsorption resins are subjected to adsorption penetrating. According to the present invention, the stripping-resin adsorption combination process is adopted to remove volatile organic compounds in groundwater, a new groundwater ectopy restoration technology is provided, and the restoration method provides high removal effects for various volatile organic compounds in the extracted groundwater.

Description

technical field [0001] The invention relates to a restoration method for groundwater polluted by volatile organic compounds. Background technique [0002] The rapid development of our country's economy has made the groundwater pollution more and more serious. Among them, organic pollution has become the main form of groundwater pollution, especially in some developed urban areas. At present, the typical groundwater pollution remediation technologies in foreign countries mainly include the following three types: extraction-treatment method (P&T), monitoring natural attenuation technology and in-situ remediation technology. Among them, the extraction-treatment method (P&T) is the most commonly used traditional ex-situ remediation technology. Since the groundwater pollution remediation was carried out in the 1980s, the P&T technology is still the main method of groundwater pollution control. According to the scope of groundwater pollution, a certain number of pumping wells are...

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Application Information

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IPC IPC(8): C02F9/04C02F1/42C02F1/20
Inventor 刘鹏张晟滕加泉戴中华蒋鹏龙超李爱民
Owner 江苏常环环境科技有限公司
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