WO2021134875A1 - Wastewater treatment device and treatment process for organic contaminated site - Google Patents

Wastewater treatment device and treatment process for organic contaminated site Download PDF

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WO2021134875A1
WO2021134875A1 PCT/CN2020/076965 CN2020076965W WO2021134875A1 WO 2021134875 A1 WO2021134875 A1 WO 2021134875A1 CN 2020076965 W CN2020076965 W CN 2020076965W WO 2021134875 A1 WO2021134875 A1 WO 2021134875A1
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Prior art keywords
sludge
wastewater
photocatalytic oxidation
organic
treated wastewater
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PCT/CN2020/076965
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French (fr)
Chinese (zh)
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朱倩
李骎
甄胜利
齐长青
谭金
王伟龙
贾晓解
于肖肖
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北京高能时代环境技术股份有限公司
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Publication of WO2021134875A1 publication Critical patent/WO2021134875A1/en

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • C02F11/147—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds

Definitions

  • the invention relates to the technical field of wastewater treatment, in particular to a sewage treatment device and a treatment process for organic polluted sites.
  • Groundwater treatment is inevitable in the process of remediation of contaminated sites.
  • Common pollutants in groundwater of organic contaminated sites mainly include petroleum hydrocarbons, halogenated hydrocarbons, phenols, benzene series and other volatile and hard-to-volatile organic compounds.
  • Remediation of contaminated sites generally involves groundwater compliance treatment and recharge requirements; therefore, groundwater compliance treatment has become a crucial part of the restoration of organic contaminated sites.
  • Chemical oxidation technology is a common organic pollutant removal technology. It can effectively degrade a variety of organic pollutants through strong oxidizing free radicals, reduce the concentration of pollutants in groundwater, and meet the needs of contaminated site remediation.
  • the present invention provides a new type of photocatalytic oxidation treatment and reuse process and device for the treatment and reuse of sewage from organic polluted sites, which can be applied to the treatment and reuse of different types of pollutants in organic polluted sites, and has a very broad Application market.
  • the present invention provides a sewage treatment device and treatment process for organic polluted sites, which can be applied to the treatment and reuse of different types of pollutants in organic polluted sites, and has a very broad application market.
  • the invention discloses a sewage treatment device for an organic polluted site, which includes:
  • the air flotation device is used to remove suspended particulate matter from the sewage in the organic polluted site to obtain the first treated wastewater;
  • the photocatalytic oxidation reaction device is used to perform photocatalytic oxidation treatment on the first treated wastewater to obtain the second treated wastewater;
  • the activated carbon filter device is used to filter the second treated wastewater to obtain the third treated wastewater; if the third treated wastewater reaches the standard, it will enter the clean water tank for reuse;
  • the sludge thickening tank is used to thicken the sludge in the air flotation device to obtain pretreated sludge;
  • the sludge dewatering device is used for dewatering the pre-treated sludge, and the dewatered sludge is sent for centralized disposal.
  • the photocatalytic oxidation reaction device includes a connected photocatalytic oxidation device and a catalyst separation device;
  • a plurality of modular integrated ultraviolet lamp assemblies are installed inside the photocatalytic oxidation device, and the plurality of lamp assemblies are arranged in a certain law according to the direction of the water flow.
  • the photocatalytic oxidation device is connected with a catalyst and oxidant dosing device, and the catalyst and oxidant dosing device is matched with an ultrasonic dispersion device;
  • the catalyst separation device includes a catalyst recirculation and screening device and a membrane filtration device.
  • the catalyst recirculation and screening device recirculates the trapped catalyst into the photocatalytic oxidation device, and the effluent of the membrane filtration device enters the activated carbon filtration device.
  • the sewage from the organic contaminated site enters the air flotation device through a lift pump;
  • the catalyst reflux and screening device returns the trapped catalyst to the photocatalytic oxidation device through a reflux pump;
  • An intermediate pool is provided between the photocatalytic oxidation reaction device and the activated carbon filter device, the effluent of the membrane filter device is lifted to the intermediate pool by a membrane water self-priming pump, and the intermediate pool enters the plant through a lift pump.
  • the activated carbon filter device
  • the third treated wastewater in the activated carbon filter device enters the clear water tank through a lift pump, and a backwash pump is provided between the clear water pool and the activated carbon filter device;
  • the pretreated sludge enters the sludge dewatering device through a lift pump.
  • the third treated wastewater does not meet the standard, it is returned to the air flotation device through a return pump.
  • the wastewater dewatered by the sludge dewatering device is returned to the front end of the air flotation device.
  • the invention also discloses a sewage treatment process for organic polluted sites, including:
  • the pre-treated sludge is dehydrated by a sludge dehydration device, and the dehydrated sludge is sent for centralized disposal.
  • the suspended particulate matter removal treatment method of the air flotation device is as follows:
  • the photocatalytic oxidation treatment method of the photocatalytic oxidation reaction device is:
  • the photocatalytic oxidation treatment of organic wastewater can realize the advanced treatment of difficult-to-degrade organics in the wastewater, remove most of the COD and reduce the color.
  • the filtering method of the activated carbon filtering device is:
  • the activated carbon further adsorbs the trace organic pollutants in the water, reduces the concentration of organic matter in the effluent, and makes the effluent meet the discharge and reuse water standards.
  • the wastewater dewatered by the sludge dewatering device is returned to the front end of the air flotation device.
  • the present invention adopts semiconductor photocatalytic oxidation technology as the core process, generates strong oxidizing hydroxyl radicals through the action of ultraviolet light and semiconductor catalyst, and thoroughly oxidizes organic matter, and finally generates water and carbon dioxide. The oxidation is complete, and there is no sludge and odor. Through the catalyst recovery system, the catalyst can be recycled multiple times, reducing the dosage of chemicals and reducing operating costs;
  • the present invention can treat and reuse different types of organic polluted sites, such as chemical, crude oil, dyes, pesticides and other organic wastewater, to meet groundwater reuse standards or discharge standards; Only after the device is combined and used in a specific order can the water meet the requirements of discharge and refilling.
  • the system device has the advantages of small floor space, high degree of automation, stable operation, and low processing cost.
  • Fig. 1 is a schematic structural diagram of a sewage treatment device for an organic polluted site disclosed in an embodiment of the present invention.
  • Air flotation device 1. Air flotation device; 2. Photocatalytic oxidation reaction device; 3. Intermediate pool; 4. Activated carbon filter device; 5. Clean water pool; 6. Sludge thickening tank; 7. Sludge dewatering device.
  • connection should be understood in a broad sense, unless otherwise clearly specified and limited.
  • it can be a fixed connection or an optional connection.
  • Detachable connection, or integral connection it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • connection should be understood in specific situations.
  • the present invention provides a sewage treatment device for organic polluted sites, including: air flotation device 1, photocatalytic oxidation reaction device 2, intermediate pool 3, activated carbon filter device 4, clean pool 5, sludge thickening pool 6 And sludge dewatering device 7; among them:
  • connection relationship of the above-mentioned devices of the present invention is:
  • air flotation device 1 photocatalytic oxidation reaction device 2, intermediate pool 3, activated carbon filter device 4, clear pool 5; activated carbon filter device 4 is connected with air flotation device 1, and clear pool 5 is connected with activated carbon filter device
  • a backwash pipeline is arranged between 4; a backwash pipeline and a catalyst return pipeline are arranged between the intermediate pool 3 and the photocatalytic oxidation reaction device 2.
  • the sludge generating devices in the air flotation device 1 are all connected to the sludge thickening tank 8, the sludge thickening tank 8 is connected to the sludge dewatering device 9, and the sludge dewatering device 9 is connected to the air flotation device 1.
  • the photocatalytic oxidation reaction device 2 of the present invention includes a connected photocatalytic oxidation device and a catalyst separation device; a plurality of modular integrated ultraviolet lamp assemblies are installed inside the photocatalytic oxidation device, and they are arranged at fixed points according to the direction of the water flow; the photocatalytic oxidation device The front end is connected with a catalyst and oxidizer dosing device through a pipeline; the catalyst and oxidizer dosing device is equipped with a catalyst ultrasonic dispersion device, which ultrasonically oscillates the catalyst in the water to improve the uniformity of the catalyst dispersion in the water; the catalyst separation device includes the catalyst backflow , Screening device and membrane filtering device, the catalyst recirculation and screening device return the trapped catalyst to the photocatalytic oxidation device, and the effluent of the membrane filtering device enters the activated carbon filtering device.
  • each pipeline is provided with water pumps or sludge pumps according to requirements; for example, sewage from an organic contaminated site enters the air flotation device 1 through the lift pump M1; the catalyst return and screening device removes the trapped catalyst It flows back to the photocatalytic oxidation device 2 through the reflux pump M2; the effluent of the membrane filter device is lifted to the intermediate pool 3 through the membrane water self-priming pump M3, and the intermediate pool 3 enters the activated carbon filter device 4 through the lift pump M4; The third treated wastewater enters the clean water tank 5 through the lift pump.
  • water pumps or sludge pumps according to requirements
  • a backwash pump M5 is provided between the clean water tank 5 and the activated carbon filter device 4; the pretreated sludge enters the sludge dewatering device 7 through the lift pump M6, and after the sludge dewatering device is dewatered The waste water is returned to the air flotation device 1 through the return pump M7.
  • the air flotation device 1 is used to remove suspended particulate matter from the sewage of the organic polluted site to obtain the first treated wastewater;
  • the sewage from the organic polluted site enters the air flotation device 1 through the lift pump M1, and the organic sewage is pretreated by the air flotation device 1 to remove suspended pollutants in the water and improve the transparency of the sewage. And adjust the amount of sewage water through the air flotation device 1 to stabilize the amount of water entering the photocatalytic oxidation device 2 through the air flotation device.
  • the photocatalytic oxidation reaction device 2 is used to perform photocatalytic oxidation treatment on the first treated wastewater to obtain the second treated wastewater;
  • the organic sewage pretreated by the air flotation device 1 flows into the photocatalytic oxidation device 2 by itself for advanced photocatalytic oxidation treatment.
  • the photocatalyst is a semiconductor nanomaterial with a particle size of 20-1000nm, and the photocatalyst is excited under the action of ultraviolet light. , Generate pairs of electrons and holes. The holes activate water, oxygen, hydrogen peroxide and other molecules in the sewage to generate strong oxidizing free radicals such as hydroxyl radicals and superoxide anion free radicals, which can perform no difference on different types of organic matter in the sewage. Oxidative degradation, so that the effluent polluted organic matter concentration, COD and chromaticity meet the requirements.
  • the water after photocatalytic oxidation treatment enters the catalyst separation device, the membrane filter device traps the nano-catalyst particles in the catalyst separation device, and the clear water enters the intermediate pool through the membrane water self-priming pump M3, and the catalyst returns and filters the device. Then the trapped catalyst is returned to the photocatalytic oxidation device through the catalyst reflux pump M2, and the catalyst reflux ratio is adjusted in the range of 30%-60% according to the water quality.
  • the membrane system will be injected with drugs (such as citric acid, oxalic acid, sodium hypochlorite, etc.) through the membrane dosing device. The components are cleaned to restore the membrane flux.
  • drugs such as citric acid, oxalic acid, sodium hypochlorite, etc.
  • the activated carbon filter device 4 is used to filter the second treatment wastewater to obtain the third treatment wastewater; if the third treatment wastewater meets the standard, it enters the clean water tank 5 for reuse; if the third treatment wastewater does not meet the standard, it returns to the Air flotation device 1;
  • the effluent of the photocatalytic oxidation device 2 enters the intermediate pool through the membrane product water self-priming pump M3, and then is lifted to the activated carbon filter device 4 by the lift pump M4.
  • the activated carbon further adsorbs a small amount of organic matter in the effluent water of the photocatalytic oxidation device to protect the effluent organic matter
  • the concentration is up to standard.
  • the activated carbon device 4 is connected with a backwash pump M5. When there is too much material trapped in the activated carbon filter device, the filtration pressure increases or the effluent water quality deteriorates, it will pump water from the clean pool 5 to the activated carbon filter device 4 through the backwash pump M5. ,
  • the filter device is backwashed, the backwash water enters from the bottom, and the backwash sewage is discharged from the pipeline into the water inlet of the air flotation device 1.
  • the sludge thickening tank 6 is used for thickening the sludge in the air flotation device 1 to obtain pretreated sludge;
  • the sludge dewatering device 7 is used for dewatering the pre-treated sludge, the dewatered sludge is sent for centralized disposal, and the dewatered wastewater is returned to the air flotation device 1;
  • the sludge in the sludge thickening tank 6 enters the sludge dewatering device 6 through the lift pump M6, the moisture content of the sludge is reduced to below 80% through the dewatering device 6, and then is sent for centralized disposal.
  • 1-200ppm PAM can be added through the PAM dosing device to improve the dewatering performance of sludge.
  • the effluent of the dehydration device is lifted to the front-end air flotation device 1 by the lift pump M7.
  • the present invention provides a sewage treatment process for organic contaminated sites using the above-mentioned treatment device, including:
  • Step 1 Sewage from the organic polluted site enters the air flotation device 1 through the lift pump to remove the suspended pollutants in the wastewater, remove a part of the suspended matter, reduce COD and improve the transparency of organic sewage;
  • Step 2 The waste water discharged from the air flotation device 1 flows into the photocatalytic oxidation reaction device 2 to perform advanced oxidation treatment on the organic matter in the waste water to remove most of the organic matter that is difficult to degrade;
  • Step 3 The water sample processed by the photocatalytic oxidation reaction device 2 enters the intermediate pool 3, and then enters the activated carbon filter device 4 through the lift pump to further adsorb the organic matter in the water and reduce the organic matter concentration, COD and chroma of the effluent;
  • Step 4 The effluent treated by the activated carbon filter device 4 enters the clean water tank 5 for reuse;
  • Step 5 After the sludge discharged from the air flotation device 1 enters the sludge thickening tank 6, it is dehydrated by the sludge dewatering device to a moisture content below 80%, and then transported for centralized disposal.
  • the sewage inflow index of the polluted site in the present invention is as shown in 1:
  • Step 1 Petroleum-based organic sewage is lifted into the air flotation device 1 by the lifting pump M1.
  • the air flotation device pretreats the sewage, and strengthens the removal of suspended pollutants in the sewage through the coagulation reagent, improves the transparency of the sewage, and passes
  • the air flotation device 1 adjusts the amount of water entering the photocatalytic oxidation device 2.
  • Step 2 The sewage pretreated by the air flotation device 1 enters the photocatalytic oxidation device through self-flow, and undergoes photocatalytic oxidation treatment to oxidize and decompose petroleum and other organic matter in the water, remove most of the COD in the water and reduce the content of petroleum pollutants Reduce to the emission standard control range.
  • the water after photocatalytic oxidation treatment enters the catalyst separation device, the membrane filtration device traps nano-catalyst particles in the catalyst separation device, and the clean water enters the clean water tank through the membrane water self-priming pump M3, and the catalyst is returned and the screening device Then the trapped catalyst is returned to the photocatalytic oxidation device through the catalyst reflux pump M2, the reflux ratio is controlled at about 50%, and the catalyst is recycled.
  • the COD of sewage treated by the photocatalytic oxidation device is reduced to less than 100mg/L, the concentration of petroleum organic matter is less than 0.5mg/L, and the chromaticity is less than 30 times. Basically meet the sewage treatment discharge and reuse standards of organic polluted sites
  • Step 3 The effluent water of the photocatalytic oxidation device 2 enters the intermediate pool and enters the activated carbon filter device via the lift pump, and further adsorbs the trace organic pollutants in the effluent water to reduce COD and organic concentration. At the same time, if the water quality of the photocatalytic oxidation device 2 fluctuates, the effluent can be treated with activated carbon through the activated carbon filtration system to ensure the stable quality of the effluent.
  • Step 4 The sludge in the sludge thickening tank enters the sludge dewatering device 6 through the lift pump M6.
  • the water content of the sludge is reduced to below 80% by the dewatering device 6, and then it is sent for centralized disposal.
  • 1-200ppm PAM can be added through the PAM dosing device to improve the dewatering performance of sludge.
  • the effluent of the dehydration device is lifted to the front-end air flotation device 1 by the lift pump M7.

Abstract

Disclosed is a wastewater treatment device for an organic contaminated site, the device comprising: an air floatation device (1), used for carrying out a suspended particulate matter removal treatment on wastewater of an organic contaminated site, to obtain first treated wastewater; a photocatalytic oxidation reaction device (2), used for carrying out a photocatalytic oxidation treatment on the first treated wastewater, to obtain second treated wastewater; an activated carbon filtration device (4), used for filtering the second treated wastewater to obtain third treated wastewater, wherein if same reaches a standard, same enters a clean water tank (5) for reuse; a sludge concentration tank (6), used for carrying out a concentration treatment on sludge in the air flotation device (1) to obtain pretreated sludge; and a sludge dewatering device (7), used for carrying out a dewatering treatment on the pretreated sludge, wherein dewatered sludge is delivered out for centralized disposal. A wastewater treatment process for an organic contaminated site is further provided, and can perform treatment and reuse of organic wastewater, such as that containing chemicals, crude oil, dyes, and pesticides, in different types of organic contaminated sites.

Description

一种有机污染场地污水处理装置及处理工艺Sewage treatment device and treatment process for organic polluted site 技术领域Technical field
本发明涉及废水处理技术领域，具体涉及一种有机污染场地污水处理装置及处理工艺。The invention relates to the technical field of wastewater treatment, in particular to a sewage treatment device and a treatment process for organic polluted sites.
背景技术Background technique
污染场地修复过程中不可避免存在地下水的处理，有机污染场地地下水中常见的污染物主要包括石油烃类、卤代烃、酚类、苯系物等挥发性和难挥发的有机物。污染场地修复一般都涉及地下水达标处理及回灌要求；因此，地下水达标处理成为有机污染场地修复至关重要的一环。化学氧化技术是常见的有机污染物去除技术，通过强氧化性自由基等能有效降解多种有机污染物，降低地下水中污染物浓度，满足污染场地修复的需求。Groundwater treatment is inevitable in the process of remediation of contaminated sites. Common pollutants in groundwater of organic contaminated sites mainly include petroleum hydrocarbons, halogenated hydrocarbons, phenols, benzene series and other volatile and hard-to-volatile organic compounds. Remediation of contaminated sites generally involves groundwater compliance treatment and recharge requirements; therefore, groundwater compliance treatment has become a crucial part of the restoration of organic contaminated sites. Chemical oxidation technology is a common organic pollutant removal technology. It can effectively degrade a variety of organic pollutants through strong oxidizing free radicals, reduce the concentration of pollutants in groundwater, and meet the needs of contaminated site remediation.
本发明提供了一种新型的集有机污染场地污水达标处理和回用的光催化氧化处理、回用工艺及装置，能够应用于有机污染场地不同类型污染物的处理和回用，具有十分广阔的应用市场。The present invention provides a new type of photocatalytic oxidation treatment and reuse process and device for the treatment and reuse of sewage from organic polluted sites, which can be applied to the treatment and reuse of different types of pollutants in organic polluted sites, and has a very broad Application market.
发明内容Summary of the invention
针对上述问题中存在的不足之处，本发明提供一种有机污染场地污水处理装置及处理工艺，能够应用于有机污染场地不同类型污染物的处理和回用，具有十分广阔的应用市场。In view of the shortcomings in the above-mentioned problems, the present invention provides a sewage treatment device and treatment process for organic polluted sites, which can be applied to the treatment and reuse of different types of pollutants in organic polluted sites, and has a very broad application market.
本发明公开了一种有机污染场地污水处理装置，包括：The invention discloses a sewage treatment device for an organic polluted site, which includes:
气浮装置，用于对有机污染场地污水进行悬浮颗粒物去除处理，得到第一处理废水；The air flotation device is used to remove suspended particulate matter from the sewage in the organic polluted site to obtain the first treated wastewater;
光催化氧化反应装置，用于对所述第一处理废水进行光催化氧化处理，得到第二处理废水；The photocatalytic oxidation reaction device is used to perform photocatalytic oxidation treatment on the first treated wastewater to obtain the second treated wastewater;
活性炭过滤装置，用于对所述第二处理废水进行过滤，得到第三处理废水；若所述第三处理废水达标，则进入清水池回用；The activated carbon filter device is used to filter the second treated wastewater to obtain the third treated wastewater; if the third treated wastewater reaches the standard, it will enter the clean water tank for reuse;
污泥浓缩池，用于对所述气浮装置中的污泥进行浓缩处理，得到预处理污泥；The sludge thickening tank is used to thicken the sludge in the air flotation device to obtain pretreated sludge;
污泥脱水装置，用于对所述预处理污泥进行脱水处理，脱水后的污泥通过外送集中处置。The sludge dewatering device is used for dewatering the pre-treated sludge, and the dewatered sludge is sent for centralized disposal.
作为本发明的进一步改进，所述光催化氧化反应装置包括相连的光催化氧化装置和催化剂分离装置；As a further improvement of the present invention, the photocatalytic oxidation reaction device includes a connected photocatalytic oxidation device and a catalyst separation device;
所述光催化氧化装置内部安装有多个模块化的一体化紫外灯组件，多个灯组件按水流方向以一定规律排布。A plurality of modular integrated ultraviolet lamp assemblies are installed inside the photocatalytic oxidation device, and the plurality of lamp assemblies are arranged in a certain law according to the direction of the water flow.
所述光催化氧化装置上连接有催化剂和氧化剂加药装置，所述催化剂和氧化剂加药装置配套有超声分散装置；The photocatalytic oxidation device is connected with a catalyst and oxidant dosing device, and the catalyst and oxidant dosing device is matched with an ultrasonic dispersion device;
所述催化剂分离装置包括催化剂回流、筛选装置和膜过滤装置，所述催化剂回流、筛选装置把截留的催化剂回流到所述光催化氧化装置内，所述膜过滤装置的出水进入活性炭过滤装置。The catalyst separation device includes a catalyst recirculation and screening device and a membrane filtration device. The catalyst recirculation and screening device recirculates the trapped catalyst into the photocatalytic oxidation device, and the effluent of the membrane filtration device enters the activated carbon filtration device.
作为本发明的进一步改进，As a further improvement of the present invention,
所述有机污染场地污水通过提升泵进入所述气浮装置；The sewage from the organic contaminated site enters the air flotation device through a lift pump;
所述催化剂回流、筛选装置把截留的催化剂通过回流泵回流到所述光催化氧化装置；The catalyst reflux and screening device returns the trapped catalyst to the photocatalytic oxidation device through a reflux pump;
所述光催化氧化反应装置与所述活性炭过滤装置之间设有中间水池，所述膜过滤装置的出水通过膜产水自吸泵提升至所述中间水池，所述中间水池通过提升泵进入所述活性炭过滤装置；An intermediate pool is provided between the photocatalytic oxidation reaction device and the activated carbon filter device, the effluent of the membrane filter device is lifted to the intermediate pool by a membrane water self-priming pump, and the intermediate pool enters the plant through a lift pump. The activated carbon filter device;
所述活性炭过滤装置中的第三处理废水通过提升泵进入所述清水池，所述清水池与所述活性炭过滤装置之间设有反冲洗泵；The third treated wastewater in the activated carbon filter device enters the clear water tank through a lift pump, and a backwash pump is provided between the clear water pool and the activated carbon filter device;
所述预处理污泥通过提升泵进入所述污泥脱水装置中。The pretreated sludge enters the sludge dewatering device through a lift pump.
作为本发明的进一步改进，若所述第三处理废水不达标，则通过回流泵回流至所述气浮装置。As a further improvement of the present invention, if the third treated wastewater does not meet the standard, it is returned to the air flotation device through a return pump.
作为本发明的进一步改进，所述污泥脱水装置脱水后的废水返回至所述气浮装置前端。As a further improvement of the present invention, the wastewater dewatered by the sludge dewatering device is returned to the front end of the air flotation device.
本发明还公开了一种有机污染场地污水处理工艺，包括：The invention also discloses a sewage treatment process for organic polluted sites, including:
通过气浮装置对有机污染场地污水进行悬浮颗粒物去除处理，得到第一处理废水；Removal and treatment of suspended particulate matter on the sewage of the organic polluted site by the air flotation device to obtain the first treated wastewater;
通过光催化氧化反应装置对所述第一处理废水进行光催化氧化处理，得到第二处理废水；Performing photocatalytic oxidation treatment on the first treated wastewater by a photocatalytic oxidation reaction device to obtain second treated wastewater;
通过活性炭过滤装置对所述第二处理废水进行过滤，得到第三处理废水；若所述第三处理废水达标，则进入清水池回用；Filter the second treated wastewater through the activated carbon filter device to obtain the third treated wastewater; if the third treated wastewater reaches the standard, it will enter the clean water tank for reuse;
通过污泥浓缩池对所述气浮装置中的污泥进行浓缩处理，得到预处理污泥；Concentrating the sludge in the air flotation device through a sludge thickening tank to obtain pretreated sludge;
通过污泥脱水装置对所述预处理污泥进行脱水处理，脱水后的污泥通过外送集中处置。The pre-treated sludge is dehydrated by a sludge dehydration device, and the dehydrated sludge is sent for centralized disposal.
作为本发明的进一步改进，所述气浮装置的悬浮颗粒物去除处理方法为：As a further improvement of the present invention, the suspended particulate matter removal treatment method of the air flotation device is as follows:
通过加入助凝剂和絮凝剂，加强对污水中的悬浮污染物的去除。By adding coagulant and flocculant, the removal of suspended pollutants in sewage is strengthened.
作为本发明的进一步改进，所述光催化氧化反应装置的光催化氧化处理方法为：As a further improvement of the present invention, the photocatalytic oxidation treatment method of the photocatalytic oxidation reaction device is:
通过加入催化剂和氧化剂，对有机废水光催化氧化处理，实现废水中难降解有机物的深度处理，去除大部分的COD并降低色度。By adding catalysts and oxidants, the photocatalytic oxidation treatment of organic wastewater can realize the advanced treatment of difficult-to-degrade organics in the wastewater, remove most of the COD and reduce the color.
作为本发明的进一步改进，所述活性炭过滤装置的过滤方法为：As a further improvement of the present invention, the filtering method of the activated carbon filtering device is:
通过活性炭对水中微量有机污染物进一步吸附，降低出水有机物浓度，使出水达到排放和回用水标准。The activated carbon further adsorbs the trace organic pollutants in the water, reduces the concentration of organic matter in the effluent, and makes the effluent meet the discharge and reuse water standards.
作为本发明的进一步改进，As a further improvement of the present invention,
若所述第三处理废水不达标，则通过回流泵回流至所述气浮装置；If the third treated wastewater does not meet the standard, return it to the air flotation device through a return pump;
所述污泥脱水装置脱水后的废水返回至所述气浮装置前端。The wastewater dewatered by the sludge dewatering device is returned to the front end of the air flotation device.
与现有技术相比，本发明的有益效果为：Compared with the prior art, the beneficial effects of the present invention are:
本发明采用半导体光催化氧化技术为核心工艺，通过紫外光和半导体催化剂的作用产生强氧化羟基自由基，对有机物进行彻底氧化，最终生成水和二氧化碳，氧化彻底，无污泥和臭气产生，通过催化剂回收系统可以实现催化剂的循环多次利用，降低药剂投加量，减少运行成本；The present invention adopts semiconductor photocatalytic oxidation technology as the core process, generates strong oxidizing hydroxyl radicals through the action of ultraviolet light and semiconductor catalyst, and thoroughly oxidizes organic matter, and finally generates water and carbon dioxide. The oxidation is complete, and there is no sludge and odor. Through the catalyst recovery system, the catalyst can be recycled multiple times, reducing the dosage of chemicals and reducing operating costs;
从应用的角度，本发明可以对不同类型有机污染场地，如化工、原油、染料、农药等有机废水进行处理并回用，满足地下水回用标准或排放标准；并且，本发明中所采用的各装置只有在组合并按特定顺序使用后才可以使水达到排放和重新回灌的要求，系统装置具有占地面积小，自动化程度高、运行稳定、处理成本低等优势。From an application point of view, the present invention can treat and reuse different types of organic polluted sites, such as chemical, crude oil, dyes, pesticides and other organic wastewater, to meet groundwater reuse standards or discharge standards; Only after the device is combined and used in a specific order can the water meet the requirements of discharge and refilling. The system device has the advantages of small floor space, high degree of automation, stable operation, and low processing cost.
附图说明Description of the drawings
图1为本发明一种实施例公开的有机污染场地污水处理装置的结构示意图。Fig. 1 is a schematic structural diagram of a sewage treatment device for an organic polluted site disclosed in an embodiment of the present invention.
图中：In the picture:
1、气浮装置；2、光催化氧化反应装置；3、中间水池；4、活性炭过滤装置；5、清水池；6、污泥浓缩池；7、污泥脱水装置。1. Air flotation device; 2. Photocatalytic oxidation reaction device; 3. Intermediate pool; 4. Activated carbon filter device; 5. Clean water pool; 6. Sludge thickening tank; 7. Sludge dewatering device.
具体实施方式Detailed ways
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
在本发明的描述中，需要说明的是，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”、“第三”仅用于描述目的，而不能理解为指示或暗示相对重要性。In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the pointed device or element must have a specific orientation or a specific orientation. The structure and operation cannot therefore be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.
在本发明的描述中，还需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。In the description of the present invention, it should also be noted that the terms "installation", "connection", and "connection" should be understood in a broad sense, unless otherwise clearly specified and limited. For example, it can be a fixed connection or an optional connection. Detachable connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the present invention can be understood in specific situations.
下面结合附图对本发明做进一步的详细描述：The present invention will be further described in detail below in conjunction with the accompanying drawings:
如图1所示，本发明提供一种有机污染场地污水处理装置，包括：气浮装置1、光催化氧化反应装置2、中间水池3、活性炭过滤装置4、清水池5、污泥浓缩池6和污泥脱水装置7；其中：As shown in Figure 1, the present invention provides a sewage treatment device for organic polluted sites, including: air flotation device 1, photocatalytic oxidation reaction device 2, intermediate pool 3, activated carbon filter device 4, clean pool 5, sludge thickening pool 6 And sludge dewatering device 7; among them:
本发明上述装置的连接关系为：The connection relationship of the above-mentioned devices of the present invention is:
根据废水流向：顺序连接的气浮装置1、光催化氧化反应装置2、中间水 池3、活性炭过滤装置4、清水池5；活性炭过滤装置4与气浮装置1相连，清水池5与活性炭过滤装置4之间设有反冲洗管道；中间水池3与光催化氧化反应装置2之间设有反冲洗管道和催化剂回流管道。According to the flow direction of wastewater: air flotation device 1, photocatalytic oxidation reaction device 2, intermediate pool 3, activated carbon filter device 4, clear pool 5; activated carbon filter device 4 is connected with air flotation device 1, and clear pool 5 is connected with activated carbon filter device A backwash pipeline is arranged between 4; a backwash pipeline and a catalyst return pipeline are arranged between the intermediate pool 3 and the photocatalytic oxidation reaction device 2.
根据污泥流向：气浮装置1中产生污泥的装置均与污泥浓缩池8相连，污泥浓缩池8与污泥脱水装置9相连，污泥脱水装置9与气浮装置1相连。According to the sludge flow direction: the sludge generating devices in the air flotation device 1 are all connected to the sludge thickening tank 8, the sludge thickening tank 8 is connected to the sludge dewatering device 9, and the sludge dewatering device 9 is connected to the air flotation device 1.
本发明的光催化氧化反应装置2包括相连的光催化氧化装置和催化剂分离装置；光催化氧化装置内部安装有多个模块化一体式紫外灯组件，并依水流方向定点排布；光催化氧化装置前端通过管道连接有催化剂和氧化剂加药装置；催化剂和氧化剂加药装置配套有催化剂超声分散装置，，在水中对催化剂进行超声振荡分散，提高催化剂在水中的分散均匀性；催化剂分离装置包括催化剂回流、筛选装置和膜过滤装置，催化剂回流、筛选装置把截留的催化剂回流到光催化氧化装置内，膜过滤装置的出水进入活性炭过滤装置。The photocatalytic oxidation reaction device 2 of the present invention includes a connected photocatalytic oxidation device and a catalyst separation device; a plurality of modular integrated ultraviolet lamp assemblies are installed inside the photocatalytic oxidation device, and they are arranged at fixed points according to the direction of the water flow; the photocatalytic oxidation device The front end is connected with a catalyst and oxidizer dosing device through a pipeline; the catalyst and oxidizer dosing device is equipped with a catalyst ultrasonic dispersion device, which ultrasonically oscillates the catalyst in the water to improve the uniformity of the catalyst dispersion in the water; the catalyst separation device includes the catalyst backflow , Screening device and membrane filtering device, the catalyst recirculation and screening device return the trapped catalyst to the photocatalytic oxidation device, and the effluent of the membrane filtering device enters the activated carbon filtering device.
进一步，上述装置之间通过对应的管道相连，各管道上根据需求对应设置水泵或污泥泵；例如：有机污染场地污水通过提升泵M1进入气浮装置1；催化剂回流、筛选装置把截留的催化剂通过回流泵M2回流到光催化氧化装置2；膜过滤装置的出水通过膜产水自吸泵M3提升至中间水池3，中间水池3通过提升泵M4进入活性炭过滤装置4；活性炭过滤装置4中的第三处理废水通过提升泵进入清水池5，清水池5与活性炭过滤装置4之间设有反冲洗泵M5；预处理污泥通过提升泵M6进入污泥脱水装置7，污泥脱水装置脱水后的废水通过回流泵M7返回至气浮装置1。Furthermore, the above-mentioned devices are connected by corresponding pipelines, and each pipeline is provided with water pumps or sludge pumps according to requirements; for example, sewage from an organic contaminated site enters the air flotation device 1 through the lift pump M1; the catalyst return and screening device removes the trapped catalyst It flows back to the photocatalytic oxidation device 2 through the reflux pump M2; the effluent of the membrane filter device is lifted to the intermediate pool 3 through the membrane water self-priming pump M3, and the intermediate pool 3 enters the activated carbon filter device 4 through the lift pump M4; The third treated wastewater enters the clean water tank 5 through the lift pump. A backwash pump M5 is provided between the clean water tank 5 and the activated carbon filter device 4; the pretreated sludge enters the sludge dewatering device 7 through the lift pump M6, and after the sludge dewatering device is dewatered The waste water is returned to the air flotation device 1 through the return pump M7.
本发明上述装置的作用为：The functions of the above-mentioned device of the present invention are:
气浮装置1，用于对有机污染场地污水进行悬浮颗粒物去除处理，得到第一处理废水；The air flotation device 1 is used to remove suspended particulate matter from the sewage of the organic polluted site to obtain the first treated wastewater;
具体的：有机污染场地污水经提升泵M1进入气浮装置1，通过气浮装置1对有机污水进行预处理，去除水中的悬浮污染物，提高污水的透明度。并通过气浮装置1调节污水水量，稳定经气浮装置进入光催化氧化装置2的水量。Specifically: the sewage from the organic polluted site enters the air flotation device 1 through the lift pump M1, and the organic sewage is pretreated by the air flotation device 1 to remove suspended pollutants in the water and improve the transparency of the sewage. And adjust the amount of sewage water through the air flotation device 1 to stabilize the amount of water entering the photocatalytic oxidation device 2 through the air flotation device.
光催化氧化反应装置2，用于对第一处理废水进行光催化氧化处理，得到第二处理废水；The photocatalytic oxidation reaction device 2 is used to perform photocatalytic oxidation treatment on the first treated wastewater to obtain the second treated wastewater;
具体的：气浮装置1预处理后的有机污水自流进入光催化氧化装置2，进行光催化氧化深度处理，光催化剂为粒径20-1000nm的半导体纳米材料，光 催化剂在紫外光作用下被激发，生成电子和空穴对，空穴活化污水中的水、氧气、双氧水等分子，产生羟基自由基和超氧负离子自由基等强氧化性自由基，能对污水中不同种类的有机物进行无差别氧化降解，使出水污染有机物浓度、COD以及色度等满足要求。经过光催化氧化处理后的水进入到催化剂分离装置内，膜过滤装置把纳米催化剂颗粒截留在催化剂分离装置内，清水则通过膜产水自吸泵M3进入到中间水池中，催化剂回流和筛选装置则把截留的催化剂通过催化剂回流泵M2回流到光催化氧化装置内，催化剂回流比根据水质情况在30％-60％范围内调整。当膜过滤率装置的跨膜压差超过限定值以后，或者运行一定时间膜过滤能力下降时，将通过膜加药装置向膜系统注入药剂(如，柠檬酸、草酸、次氯酸钠等)，对膜组件进行清洗，恢复膜通量。Specifically: the organic sewage pretreated by the air flotation device 1 flows into the photocatalytic oxidation device 2 by itself for advanced photocatalytic oxidation treatment. The photocatalyst is a semiconductor nanomaterial with a particle size of 20-1000nm, and the photocatalyst is excited under the action of ultraviolet light. , Generate pairs of electrons and holes. The holes activate water, oxygen, hydrogen peroxide and other molecules in the sewage to generate strong oxidizing free radicals such as hydroxyl radicals and superoxide anion free radicals, which can perform no difference on different types of organic matter in the sewage. Oxidative degradation, so that the effluent polluted organic matter concentration, COD and chromaticity meet the requirements. The water after photocatalytic oxidation treatment enters the catalyst separation device, the membrane filter device traps the nano-catalyst particles in the catalyst separation device, and the clear water enters the intermediate pool through the membrane water self-priming pump M3, and the catalyst returns and filters the device. Then the trapped catalyst is returned to the photocatalytic oxidation device through the catalyst reflux pump M2, and the catalyst reflux ratio is adjusted in the range of 30%-60% according to the water quality. When the transmembrane pressure difference of the membrane filtration rate device exceeds the limit value, or when the membrane filtration capacity decreases after a certain period of operation, the membrane system will be injected with drugs (such as citric acid, oxalic acid, sodium hypochlorite, etc.) through the membrane dosing device. The components are cleaned to restore the membrane flux.
活性炭过滤装置4，用于对第二处理废水进行过滤，得到第三处理废水；若第三处理废水达标，则进入清水池5回用；若第三处理废水不达标，则通过回流泵回流至气浮装置1；The activated carbon filter device 4 is used to filter the second treatment wastewater to obtain the third treatment wastewater; if the third treatment wastewater meets the standard, it enters the clean water tank 5 for reuse; if the third treatment wastewater does not meet the standard, it returns to the Air flotation device 1;
具体的：光催化氧化装置2的出水经膜产水自吸泵M3进入中间水池，然后通过提升泵M4提升至活性炭过滤装置4，活性炭进一步吸附光催化氧化装置出水中少量的有机物，保障出水有机物浓度达标。活性炭装置4连接有反冲洗泵M5，当活性炭过滤装置中截留的物质过多，过滤压力升高后或出水水质变差时，将通过反冲洗泵M5，从清水池5抽水至活性炭过滤装置4，对过滤装置进行反冲洗，反冲洗水从底部进入，反冲洗污水从管道排入气浮装置1进水端。Specifically: the effluent of the photocatalytic oxidation device 2 enters the intermediate pool through the membrane product water self-priming pump M3, and then is lifted to the activated carbon filter device 4 by the lift pump M4. The activated carbon further adsorbs a small amount of organic matter in the effluent water of the photocatalytic oxidation device to protect the effluent organic matter The concentration is up to standard. The activated carbon device 4 is connected with a backwash pump M5. When there is too much material trapped in the activated carbon filter device, the filtration pressure increases or the effluent water quality deteriorates, it will pump water from the clean pool 5 to the activated carbon filter device 4 through the backwash pump M5. , The filter device is backwashed, the backwash water enters from the bottom, and the backwash sewage is discharged from the pipeline into the water inlet of the air flotation device 1.
污泥浓缩池6，用于对气浮装置1中的污泥进行浓缩处理，得到预处理污泥；The sludge thickening tank 6 is used for thickening the sludge in the air flotation device 1 to obtain pretreated sludge;
污泥脱水装置7，用于对预处理污泥进行脱水处理，脱水后的污泥通过外送集中处置，脱水后的废水返回至气浮装置1；The sludge dewatering device 7 is used for dewatering the pre-treated sludge, the dewatered sludge is sent for centralized disposal, and the dewatered wastewater is returned to the air flotation device 1;
具体的：污泥浓缩池6中污泥通过提升泵M6，进入污泥脱水装置6，经脱水装置6将污泥含水率降低至80％以下，然后通过外送集中处置。根据污泥脱水的需求，可通过PAM加药装置来投加1-200ppmPAM来改善污泥的脱水性能。脱水装置的出水经提升泵M7提升至前端气浮装置1。Specifically: the sludge in the sludge thickening tank 6 enters the sludge dewatering device 6 through the lift pump M6, the moisture content of the sludge is reduced to below 80% through the dewatering device 6, and then is sent for centralized disposal. According to the demand of sludge dewatering, 1-200ppm PAM can be added through the PAM dosing device to improve the dewatering performance of sludge. The effluent of the dehydration device is lifted to the front-end air flotation device 1 by the lift pump M7.
本发明提供一种利用上述处理装置的有机污染场地污水处理工艺，包括：The present invention provides a sewage treatment process for organic contaminated sites using the above-mentioned treatment device, including:
步骤1、有机污染场地污水经提升泵进入气浮装置1，对废水中的悬浮污 染物进行去除，去除一部分悬浮物，降低COD并提高有机污水透明度；Step 1. Sewage from the organic polluted site enters the air flotation device 1 through the lift pump to remove the suspended pollutants in the wastewater, remove a part of the suspended matter, reduce COD and improve the transparency of organic sewage;
步骤2、气浮装置1排出的废水自流进入光催化氧化反应装置2，对废水中的有机物进行高级氧化处理，去除大部分难降解的有机物； Step 2. The waste water discharged from the air flotation device 1 flows into the photocatalytic oxidation reaction device 2 to perform advanced oxidation treatment on the organic matter in the waste water to remove most of the organic matter that is difficult to degrade;
步骤3、光催化氧化反应装置2处理完水样进入中间水池3，然后经提升泵进入活性炭过滤装置4，对水中有机物进行进一步吸附，降低出水有机物浓度、COD以及色度；Step 3. The water sample processed by the photocatalytic oxidation reaction device 2 enters the intermediate pool 3, and then enters the activated carbon filter device 4 through the lift pump to further adsorb the organic matter in the water and reduce the organic matter concentration, COD and chroma of the effluent;
步骤4、由活性炭过滤装置4处理达标的出水进入清水池5进行回用； Step 4. The effluent treated by the activated carbon filter device 4 enters the clean water tank 5 for reuse;
步骤5、气浮装置1外排的污泥进入污泥浓缩池6后，经污泥脱水装置脱水至含水率80％以下，外运集中处置。 Step 5. After the sludge discharged from the air flotation device 1 enters the sludge thickening tank 6, it is dehydrated by the sludge dewatering device to a moisture content below 80%, and then transported for centralized disposal.
实施例：Examples:
以石油类有机污染场地污水处理为例，本发明更具体的工艺过程如下：其中本发明中污染场地污水进水指标如1所示：Taking the sewage treatment of a petroleum-based organic polluted site as an example, the more specific process of the present invention is as follows: The sewage inflow index of the polluted site in the present invention is as shown in 1:
Figure PCTCN2020076965-appb-000001
Figure PCTCN2020076965-appb-000001
步骤1、石油类有机污水经提升泵M1，提升进入气浮装置1，由气浮装置对污水进行预处理，通过混凝试剂加强对污水中的悬浮污染物的去除，提高污水透明度，并通过气浮装置1调节进入光催化氧化装置2的进水水量。Step 1. Petroleum-based organic sewage is lifted into the air flotation device 1 by the lifting pump M1. The air flotation device pretreats the sewage, and strengthens the removal of suspended pollutants in the sewage through the coagulation reagent, improves the transparency of the sewage, and passes The air flotation device 1 adjusts the amount of water entering the photocatalytic oxidation device 2.
步骤2、气浮装置1预处理后的污水，经自流进入光催化氧化装置，通过光催化氧化处理，将水中石油类及其他有机物进行氧化分解，去除水中大部分COD并将石油类污染物含量降低至排放标准控制范围内。经过光催化氧化处理后的水进入到催化剂分离装置内，膜过滤装置把纳米催化剂颗粒截留在催化剂分离装置内，清水则通过膜产水自吸泵M3进入到清水池中，催化剂回流和筛选装置则把截留的催化剂通过催化剂回流泵M2回流到光催化氧化装置内，回流比控制在50％左右，催化剂循环利用。经过光催化氧化装置处理后的污水COD降低到100mg/L以下，石油类有机物浓度低于0.5mg/L，色度低于30倍。基本能满足有机污染场地污水处理排放及回用标准 Step 2. The sewage pretreated by the air flotation device 1 enters the photocatalytic oxidation device through self-flow, and undergoes photocatalytic oxidation treatment to oxidize and decompose petroleum and other organic matter in the water, remove most of the COD in the water and reduce the content of petroleum pollutants Reduce to the emission standard control range. The water after photocatalytic oxidation treatment enters the catalyst separation device, the membrane filtration device traps nano-catalyst particles in the catalyst separation device, and the clean water enters the clean water tank through the membrane water self-priming pump M3, and the catalyst is returned and the screening device Then the trapped catalyst is returned to the photocatalytic oxidation device through the catalyst reflux pump M2, the reflux ratio is controlled at about 50%, and the catalyst is recycled. The COD of sewage treated by the photocatalytic oxidation device is reduced to less than 100mg/L, the concentration of petroleum organic matter is less than 0.5mg/L, and the chromaticity is less than 30 times. Basically meet the sewage treatment discharge and reuse standards of organic polluted sites
步骤3、光催化氧化装置2出水进入中间水池并经由提升泵进入活性炭过滤装置，进一步对出水中的微量的有机污染物进行吸附，降低COD和有机物浓度。同时若光催化氧化装置2水质波动，通过活性炭过滤系统可对出水进 行活性炭吸附处理，保证出水水质稳定。Step 3. The effluent water of the photocatalytic oxidation device 2 enters the intermediate pool and enters the activated carbon filter device via the lift pump, and further adsorbs the trace organic pollutants in the effluent water to reduce COD and organic concentration. At the same time, if the water quality of the photocatalytic oxidation device 2 fluctuates, the effluent can be treated with activated carbon through the activated carbon filtration system to ensure the stable quality of the effluent.
步骤4、污泥浓缩池中污泥通过提升泵M6，进入污泥脱水装置6，经脱水装置6将污泥含水率降低至80％以下，然后通过外送集中处置。根据污泥脱水的需求，可通过PAM加药装置来投加1-200ppmPAM来改善污泥的脱水性能。脱水装置的出水经提升泵M7提升至前端气浮装置1。 Step 4. The sludge in the sludge thickening tank enters the sludge dewatering device 6 through the lift pump M6. The water content of the sludge is reduced to below 80% by the dewatering device 6, and then it is sent for centralized disposal. According to the demand of sludge dewatering, 1-200ppm PAM can be added through the PAM dosing device to improve the dewatering performance of sludge. The effluent of the dehydration device is lifted to the front-end air flotation device 1 by the lift pump M7.
以上仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above are only preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

  1. 一种有机污染场地污水处理装置，其特征在于，包括：A sewage treatment device for an organic polluted site, which is characterized in that it comprises:
    气浮装置，用于对有机污染场地污水进行悬浮颗粒物去除处理，得到第一处理废水；The air flotation device is used to remove suspended particulate matter from the sewage in the organic polluted site to obtain the first treated wastewater;
    光催化氧化反应装置，用于对所述第一处理废水进行光催化氧化处理，得到第二处理废水；The photocatalytic oxidation reaction device is used to perform photocatalytic oxidation treatment on the first treated wastewater to obtain the second treated wastewater;
    活性炭过滤装置，用于对所述第二处理废水进行过滤，得到第三处理废水；若所述第三处理废水达标，则进入清水池回用；The activated carbon filter device is used to filter the second treated wastewater to obtain the third treated wastewater; if the third treated wastewater reaches the standard, it will enter the clean water tank for reuse;
    污泥浓缩池，用于对所述气浮装置中的污泥进行浓缩处理，得到预处理污泥；The sludge thickening tank is used to thicken the sludge in the air flotation device to obtain pretreated sludge;
    污泥脱水装置，用于对所述预处理污泥进行脱水处理，脱水后的污泥通过外送集中处置。The sludge dewatering device is used for dewatering the pre-treated sludge, and the dewatered sludge is sent for centralized disposal.
  2. 如权利要求1所述的有机污染场地污水处理装置，其特征在于，所述光催化氧化反应装置包括相连的光催化氧化装置和催化剂分离装置；The sewage treatment device for organic polluted sites according to claim 1, wherein the photocatalytic oxidation reaction device comprises a connected photocatalytic oxidation device and a catalyst separation device;
    所述光催化氧化装置上连接有催化剂和氧化剂加药装置，所述催化剂和氧化剂加药装置上配套有超声分散装置；The photocatalytic oxidation device is connected with a catalyst and oxidant dosing device, and the catalyst and oxidant dosing device is matched with an ultrasonic dispersion device;
    所述催化剂分离装置包括催化剂回流、筛选装置和膜过滤装置，所述催化剂回流、筛选装置把截留的催化剂回流到所述光催化氧化装置内，所述膜过滤装置的出水进入活性炭过滤装置。The catalyst separation device includes a catalyst recirculation and screening device and a membrane filtration device. The catalyst recirculation and screening device recirculates the trapped catalyst into the photocatalytic oxidation device, and the effluent of the membrane filtration device enters the activated carbon filtration device.
  3. 如权利要求2所述的有机污染场地污水处理装置，其特征在于，The sewage treatment device for organic contaminated sites according to claim 2, characterized in that:
    所述有机污染场地污水通过提升泵进入所述气浮装置；The sewage from the organic contaminated site enters the air flotation device through a lift pump;
    所述催化剂回流、筛选装置把截留的催化剂通过回流泵回流到所述光催化氧化装置；The catalyst reflux and screening device returns the trapped catalyst to the photocatalytic oxidation device through a reflux pump;
    所述光催化氧化反应装置与所述活性炭过滤装置之间设有中间水池，所述膜过滤装置的出水通过膜产水自吸泵提升至所述中间水池，所述中间水池通过提升泵进入所述活性炭过滤装置；An intermediate pool is provided between the photocatalytic oxidation reaction device and the activated carbon filter device, the effluent of the membrane filter device is lifted to the intermediate pool by a membrane water self-priming pump, and the intermediate pool enters the plant through a lift pump. The activated carbon filter device;
    所述活性炭过滤装置中的第三处理废水通过提升泵进入所述清水池，所述清水池与所述活性炭过滤装置之间设有反冲洗泵；The third treated wastewater in the activated carbon filter device enters the clean water tank through a lift pump, and a backwash pump is provided between the clean water tank and the activated carbon filter device;
    所述预处理污泥通过提升泵进入所述污泥脱水装置中。The pretreated sludge enters the sludge dewatering device through a lift pump.
  4. 如权利要求1所述的有机污染场地污水处理装置，其特征在于，若所述第三处理废水不达标，则通过回流泵回流至所述气浮装置。4. The sewage treatment device for an organic contaminated site according to claim 1, wherein if the third treated wastewater does not meet the standard, it is returned to the air flotation device through a return pump.
  5. 如权利要求1所述的有机污染场地污水处理装置，其特征在于，所述污泥脱水装置脱水后的废水返回至所述气浮装置前端。The sewage treatment device for an organic contaminated site according to claim 1, wherein the wastewater dewatered by the sludge dehydration device is returned to the front end of the air flotation device.
  6. 一种有机污染场地污水处理工艺，其特征在于，包括：A sewage treatment process for organic contaminated sites, which is characterized in that it includes:
    通过气浮装置对有机污染场地污水进行悬浮颗粒物去除处理，得到第一处理废水；Removal and treatment of suspended particulate matter on the sewage of the organic polluted site by the air flotation device to obtain the first treated wastewater;
    通过光催化氧化反应装置对所述第一处理废水进行光催化氧化处理，得到第二处理废水；Performing photocatalytic oxidation treatment on the first treated wastewater by a photocatalytic oxidation reaction device to obtain second treated wastewater;
    通过活性炭过滤装置对所述第二处理废水进行过滤，得到第三处理废水；若所述第三处理废水达标，则进入清水池回用；Filter the second treated wastewater through the activated carbon filter device to obtain the third treated wastewater; if the third treated wastewater reaches the standard, it will enter the clean water tank for reuse;
    通过污泥浓缩池对所述气浮装置中的污泥进行浓缩处理，得到预处理污泥；Concentrating the sludge in the air flotation device through a sludge thickening tank to obtain pretreated sludge;
    通过污泥脱水装置对所述预处理污泥进行脱水处理，脱水后的污泥通过外送集中处置。The pre-treated sludge is dehydrated by a sludge dehydration device, and the dehydrated sludge is sent for centralized disposal.
  7. 如权利要求6所述的有机污染场地污水处理工艺，其特征在于，所述气浮装置的悬浮颗粒物去除处理方法为：8. The organic polluted site sewage treatment process according to claim 6, wherein the suspended particulate matter removal treatment method of the air flotation device is:
    通过加入助凝剂和絮凝剂，加强对污水中的悬浮污染物的去除。By adding coagulant and flocculant, the removal of suspended pollutants in sewage is strengthened.
  8. 如权利要求6所述的有机污染场地污水处理工艺，其特征在于，所述光催化氧化反应装置的光催化氧化处理方法为：7. The organic polluted site sewage treatment process according to claim 6, wherein the photocatalytic oxidation treatment method of the photocatalytic oxidation reaction device is:
    通过加入催化剂和氧化剂，对有机废水光催化氧化处理，实现废水中难降解有机物的深度处理，去除大部分的COD并降低色度。By adding catalysts and oxidants, the photocatalytic oxidation treatment of organic wastewater can realize the advanced treatment of difficult-to-degrade organics in the wastewater, remove most of the COD and reduce the color.
  9. 如权利要求6所述的有机污染场地污水处理工艺，其特征在于，所述活性炭过滤装置的过滤方法为：8. The organic polluted site sewage treatment process according to claim 6, wherein the filtering method of the activated carbon filtering device is:
    通过活性炭对水中微量有机污染物进一步吸附，降低出水有机物浓度，使出水达到排放和回用水标准。The activated carbon further adsorbs the trace organic pollutants in the water, reduces the concentration of organic matter in the effluent, and makes the effluent meet the discharge and reuse water standards.
  10. 如权利要求6所述的有机污染场地污水处理工艺，其特征在于，The sewage treatment process for organic contaminated sites according to claim 6, characterized in that:
    若所述第三处理废水不达标，则通过回流泵回流至所述气浮装置；If the third treated wastewater does not meet the standard, return it to the air flotation device through a return pump;
    所述污泥脱水装置脱水后的废水返回至所述气浮装置前端。The wastewater dewatered by the sludge dewatering device is returned to the front end of the air flotation device.
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