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Device for improving efficiency of treating wastewater by irradiation of electronic accelerator

An electron accelerator and a technology for treating wastewater, which is applied in the field of irradiation, can solve problems such as the limitation of the promotion and use of electron accelerator irradiation treatment wastewater, and achieve the effects of reducing high dose rate effect, improving irradiation efficiency, and reducing energy loss.

Inactive Publication Date: 2013-09-25
CGN DASHENG ELECTRON ACCELERATOR TECH
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Problems solved by technology

Therefore, the popularization and use of electron accelerator radiation treatment of wastewater has been limited to a certain extent.

Method used

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  • Device for improving efficiency of treating wastewater by irradiation of electronic accelerator

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Embodiment 1

[0032] The cyanide-containing wastewater came from a fiber manufacturing enterprise in Jiangsu Province, and the pH value was adjusted to 10.25 with NaOH solution. The radiation source is a 0.55 MeV, 20 mA self-shielded electron accelerator produced by Jiangsu Dasheng Accelerator Manufacturing Co., Ltd. The distance between the scanning foil window of the accelerator and the water treatment reactor is 200 mm. After the air is irradiated by the electron beam, it undergoes pre-oxidation reaction with the wastewater in the contact reactor, and the absorbed dose is reduced from 10 kGy to 6 kGy; the gas dissolved in the wastewater reduces the density of the mixture, and the penetration depth of the electron beam decreases from 1 to 6 kGy. mm increased to 3 mm. Through the above measures, the ray utilization rate of electron accelerator irradiation treatment wastewater has increased by 55% on average.

Embodiment 2

[0034] The printing and dyeing wastewater comes from a printing and dyeing sewage treatment plant in Jiangsu Province. The radiation source is a 1.5 MeV, 50 mA electron accelerator produced by Jiangsu Dasheng Accelerator Manufacturing Co., Ltd. The distance between the scanning foil window of the accelerator and the water treatment reactor is 250 mm. After the air is irradiated by the electron beam, it undergoes pre-oxidation reaction with the wastewater in the contact reactor, and the absorbed dose is reduced from 3 kGy to 2 kGy; the gas dissolved in the wastewater reduces the density of the mixture, and the penetration depth of the electron beam decreases from 4 kGy to 2 kGy. mm increased to 6 mm. Through the above measures, the ray utilization rate of electron accelerator irradiation treatment wastewater has increased by an average of 40%.

[0035] In summary, the present invention provides a device for improving the efficiency of electron accelerator irradiation treatment ...

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Abstract

The invention discloses a device for improving the efficiency of treating wastewater by irradiation of an electronic accelerator. The device comprises an irradiation chamber, wherein a water treatment reactor is arranged in the irradiation chamber; a nozzle is arranged in one side of the water treatment reactor; a water discharging port is formed in the other side of the water treatment reactor; a scanning foil window is arranged above the water treatment reactor; the electronic accelerator connected with the scanning foil window is arranged outside the irradiation chamber; a contact reactor is arranged outside the irradiation chamber; a water outlet of the contact reactor is communicated with the nozzle; an air discharging hole is formed in the upper end of the irradiation chamber and is communicated with the bottom of the contact reactor. According to the device, irradiated gas which is rich in active free radicals and ozone and wastewater perform pre-oxidization reaction in the contact reactor, so that the absorption dosage of wastewater is reduced; therefore, reacted wastewater can flow into the water treatment reactor for irradiation treatment; according to the gas dissolved in the wastewater, the density of a mixer is reduced, the penetration depth of an electronic bundle is increased, a high dose-rate effect of the electronic accelerator is reduced, and the irradiation efficiency is improved.

Description

technical field [0001] The invention relates to a device for improving the efficiency of electron accelerator radiation treatment of waste water, which belongs to the technical field of radiation. Background technique [0002] Electron accelerator irradiation is a high technology that can eliminate environmental pollution (waste gas, waste water and sludge). In wastewater treatment, electron beams interact with water molecules to generate high reactive free radicals (OH, e aq - and H), ions, and H 2 o 2 、H 2 and other molecules. When the pH value is 3~11, the radiation chemical reaction of water is as follows: [0003] h 2 O→[2.7]e aq - +[0.6] H +[2.8] OH +[0.45]H 2 +[0.72]H 2 o 2 +[3.2]H aq + +[0.5]OH aq - [0004] The yield (G value) of the corresponding particles is in the parentheses of the above formula, which means the number of particles of this kind produced or destroyed for every absorbed deposition energy of 100eV. In the formula, hydroxyl radical...

Claims

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Application Information

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IPC IPC(8): C02F9/08
Inventor 何仕均俞江叶龙飞
Owner CGN DASHENG ELECTRON ACCELERATOR TECH
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