Ozone catalytic oxidation method and device

An ozone catalytic oxidation and ozone technology, which is applied in chemical instruments and methods, oxidized water/sewage treatment, water pollutants, etc. The effect of improving ozone utilization, improving ozone transfer coefficient and transfer efficiency

Pending Publication Date: 2016-03-23
GO HIGHER ENVIRONMENT GRP CO LTD
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Problems solved by technology

[0005] Aiming at the deficiencies of the existing sewage treatment technology, the present invention provides a method and device for ozone catalytic oxidation, which are used to treat organic matter in low-concentration refractory sewage treatment, solve the problems of refractory organic matter degradation and low ozone utilization rate, and can Applicable to a variety of process combinations and various sewage treatment projects

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  • Ozone catalytic oxidation method and device

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Embodiment 1

[0074] A sewage treatment plant was originally designed to feed domestic sewage, but now most of the actual feed water is papermaking wastewater. The biodegradability of influent water is low, and the main refractory pollutant is lignin. Most of the discharge enterprises served by the water plant have corporate sewage treatment stations, and the drainage is in accordance with the urban sewer discharge standards, but there is no special requirement for BOD. Therefore, most of the biochemical and easy-to-treat parts of the sewage have been treated in the sewage treatment stations of the enterprises themselves. However, although the COD of the sewage flowing into the sewage treatment plant does not exceed the sewer discharge standard, the difficulty of treatment is much higher than the sewer discharge standard.

[0075] The influent water is mixed wastewater from various enterprises in an economic development zone. The water quality is complex and the biochemical properties are e...

Embodiment 2

[0079] The treatment scale of a sewage treatment plant is 30000m 3 / day, the process flow is: Coarse grid—lift pump—fine grid—aeration grit chamber—hydrolytic acidification tank—A / O tank—secondary sedimentation tank—ultraviolet disinfection tank—water outlet. Industrial wastewater accounts for more than 60%, printing and dyeing wastewater accounts for about 85% of industrial wastewater, and the influent biodegradability is poor, B / C<0.25. The average value of influent COD is 298mg / L, the maximum value is 621mg / L, and the minimum value is 189mg / L; the average value of influent SS is 130mg / L, the maximum value reaches 350mg / L, and the minimum value is 50mg / L; The average value of water NH3-N is 12.5mg / L, the maximum value reaches 25mg / L, and the minimum value is 5.7mg / L. The influent chroma is higher, higher than 100 times. The COD of the effluent exceeds the standard, with an average value of 89mg / L, and the chroma of the effluent exceeds the standard, with an average value o...

Embodiment 3

[0083] The total scale of a sewage treatment plant project in an industrial park is 40,000m 3 / d, the design scale of the first phase is 20000m 3 / d, mainly treats industrial wastewater from petroleum, petrochemical and mechanical processing enterprises, and the designed daily treatment scale of the sewage treatment plant is 20,000m 3 / d. Industrial wastewater accounts for as high as 97.2% of the total influent, and industrial wastewater is mainly petrochemical wastewater. The process flow of the sewage treatment plant is: coarse screen - sewage lifting pump room - fine screen - advection grit chamber - hydrolytic acidification tank - AAO biochemical tank - secondary settling tank - secondary lifting pump room - coagulation sedimentation tank - fiber turntable Filter - UV disinfection pool.

[0084] The current influent water of the water plant mainly has the following problems: (1) The domestic sewage in the influent water accounts for only 2.8% of the total influent water...

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Abstract

The invention discloses an ozone catalytic oxidation method and device. The device comprises a contact oxidation tank, a water input pipe, a booster pump, a high-efficiency dissolved-air ejector, a perforated pipe water distributor, a catalyst filling material separation plate, a catalyst filling material, an ozone air inlet pipe, an ozone tail gas air inlet pipe and an ozone tail gas destroying device. The contact oxidation tank has a multi-section shunting type, sewage flows into the contact oxidation tank from the bottom and flows out from the top, and an up-flow contact oxidation reaction route is formed. Ozone is fully mixed with sewage and dissolved through the high-efficiency dissolved-air ejector, and is distributed at the bottom of the reaction tank through the perforated pipe water distributor. The catalyst filling material separation plate is arranged at the bottom of the reaction tank, and a catalyst layer is arranged on the separation plate. The catalyst is a high-efficiency load-type catalyst with metal and metal oxide loaded on a porous carrier. Sewage and ozone are subjected to a heterogeneous catalysis reaction in the contact oxidation tank under catalysis of the load catalyst, the ozone utilization efficiency and the oxidation efficiency are raised greatly, the ozone addition amount is reduced, and the operation cost is lowered.

Description

technical field [0001] The invention relates to an ozone catalytic oxidation method and device, belonging to the field of sewage treatment. Background technique [0002] After decades of development, my country's sewage treatment industry has made rapid progress. At present, the urban sewage treatment rate of the city has completed the target of 70% ahead of schedule, and the large-scale urban sewage treatment projects have gradually become saturated, but the actual compliance rate of urban sewage in my country does not exceed 70%. There are still many sewage treatment projects that cannot meet the normal discharge standards due to various reasons such as mixed industrial sewage, and the influent standards of many municipal sewage plants are relatively vague, especially in some second- and third-tier cities and small towns. Wastewater mixed with municipal sewage is discharged into municipal sewage treatment plants. The municipal sewage treatment plant designed and construc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/78C02F101/30
CPCC02F1/725C02F1/78C02F2101/30
Inventor 陈福泰于明
Owner GO HIGHER ENVIRONMENT GRP CO LTD
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