CN107324443A - A kind of sewage-treatment plant of use gas phase surface discharge plasma - Google Patents
A kind of sewage-treatment plant of use gas phase surface discharge plasma Download PDFInfo
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- CN107324443A CN107324443A CN201710787367.6A CN201710787367A CN107324443A CN 107324443 A CN107324443 A CN 107324443A CN 201710787367 A CN201710787367 A CN 201710787367A CN 107324443 A CN107324443 A CN 107324443A
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/305—Treatment of water, waste water, or sewage by irradiation with electrons
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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
- 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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/02—Fluid flow conditions
- C02F2301/026—Spiral, helicoidal, radial
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
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Abstract
本发明公开了一种采用气相表面放电等离子体的污水处理装置，它包括高压放电电源、反应容器、设置在所述反应容器内的石英管和插入所述石英管内的螺旋电极，所述的螺旋电极连接所述高压放电电源的正极，所述石英管的上端设有进气口，下端连通有曝气头，所述反应容器的下部设有进水口，上端设有出气口。整个装置实用性强、能源利用率、处理效果好，在污水处理领域具有广阔的应用前景。
The invention discloses a sewage treatment device using gas-phase surface discharge plasma, which comprises a high-voltage discharge power supply, a reaction vessel, a quartz tube arranged in the reaction vessel and a spiral electrode inserted into the quartz tube. The spiral The electrodes are connected to the positive pole of the high-voltage discharge power supply, the upper end of the quartz tube is provided with an air inlet, the lower end is connected with an aeration head, the lower part of the reaction vessel is provided with a water inlet, and the upper end is provided with an air outlet. The whole device has strong practicability, high energy utilization rate and good treatment effect, and has broad application prospects in the field of sewage treatment.
Description
技术领域technical field
本发明属于水污染净化处理领域，具体涉及一种采用气相表面放电等离子体的污水处理装置。The invention belongs to the field of water pollution purification treatment, and in particular relates to a sewage treatment device using gas-phase surface discharge plasma.
背景技术Background technique
随着我国经济和社会的发展，水资源短缺和水环境污染日益突出并成为人们关注的焦点。近年来，各种工业生产带来的水污染越来越严重，污水的成分日益复杂，环保部门对水处理的要求也不断加强，传统生物处理技术已经难以满足目前的水质处理要求。With the development of our country's economy and society, the shortage of water resources and the pollution of water environment have become increasingly prominent and become the focus of people's attention. In recent years, water pollution caused by various industrial productions has become more and more serious, the composition of sewage has become increasingly complex, and the requirements of environmental protection departments for water treatment have also been continuously strengthened. Traditional biological treatment technology has been difficult to meet the current water quality treatment requirements.
低温等离子技术是一种新兴的高级氧化技术，已经在环境领域得到利用。常用的人工产生低温等离子体的方法是高压放电，高压放电过程中形成了大量高能电子，产生·H、·OH、·O、·N、H2O2、O3等活性粒子，并伴随高温热解、紫外光降解、冲击波等效应，能有效降解各类有机物。Low-temperature plasma technology is an emerging advanced oxidation technology that has been utilized in the environmental field. The commonly used method of artificially generating low-temperature plasma is high-voltage discharge. During the high-voltage discharge process, a large number of high-energy electrons are formed, and active particles such as H, OH, O, N, H 2 O 2 , O 3 are generated, accompanied by high temperature Pyrolysis, ultraviolet light degradation, shock wave and other effects can effectively degrade various organic substances.
现有的等离子技术大多是在水面上的空气中放电，再将产生的活性粒子引入水中反应，这样会导致活性物质不能被充分利用，因此需要设计一种新的等离子体污水处理装置能在水中直接降解污染物，最大限度的利用等离子产生的活性物质。Most of the existing plasma technology discharges in the air on the water surface, and then introduces the generated active particles into the water to react, which will lead to the inability of the active substances to be fully utilized. Therefore, it is necessary to design a new plasma sewage treatment device that can be used in water Directly degrade pollutants and maximize the use of active substances generated by plasma.
发明内容Contents of the invention
本发明的目的在于针对背景技术提出的技术问题提供一种采用气相表面放电等离子体的污水处理装置，本装置设计简单、投资低、处理效果好、无二次污染等优点，可以应用于难降解污染废水领域的深度高效处理。The purpose of the present invention is to provide a sewage treatment device using gas-phase surface discharge plasma in view of the technical problems raised by the background technology. The device has the advantages of simple design, low investment, good treatment effect, and no secondary pollution, and can be applied to refractory Deep and efficient treatment of polluted wastewater.
本发明的目的通过如下技术方案实现：The purpose of the present invention is achieved through the following technical solutions:
一种采用气相表面放电等离子体的污水处理装置，它包括高压放电电源、反应容器、设置在所述反应容器内的石英管和插入所述石英管内的螺旋电极，所述的螺旋电极连接所述高压放电电源的正极，所述石英管的上端设有进气口，下端连通有曝气头，所述反应容器的下部设有进水口，上端设有出气口。A sewage treatment device using gas-phase surface discharge plasma, which includes a high-voltage discharge power supply, a reaction vessel, a quartz tube arranged in the reaction vessel, and a spiral electrode inserted into the quartz tube, and the spiral electrode is connected to the The positive pole of the high-voltage discharge power supply, the upper end of the quartz tube is provided with an air inlet, the lower end is connected with an aeration head, the lower part of the reaction vessel is provided with a water inlet, and the upper end is provided with an air outlet.
所述的进气口通过鼓风机向石英管内通入气体。The air inlet passes gas into the quartz tube through a blower.
所述的进水口通过蠕动泵向所述的反应容器内通入废水。所述的蠕动泵设于所述反应容器的下端，构成参数根据待处理液体的性质选定。The water inlet passes waste water into the reaction vessel through a peristaltic pump. The peristaltic pump is arranged at the lower end of the reaction vessel, and its configuration parameters are selected according to the properties of the liquid to be treated.
所述反应容器内的废水连接接地极和所述高压放电电源的负极。The waste water in the reaction vessel is connected to the ground electrode and the negative pole of the high-voltage discharge power supply.
所述的反应容器为圆筒状，所述反应容器的材质为有机玻璃。本发明设计的反应容器的内径为8cm，高度为74cm，但不限于此。The reaction vessel is cylindrical, and the material of the reaction vessel is plexiglass. The inner diameter of the reaction vessel designed by the present invention is 8cm, and the height is 74cm, but it is not limited thereto.
所述螺旋电极的外径与所述石英管的内径相配合，紧贴所述石英管的内壁；所述的螺旋电极材质为不锈钢。本发明设计的螺旋电极直径为1mm，但不限于此。The outer diameter of the spiral electrode matches the inner diameter of the quartz tube, and is close to the inner wall of the quartz tube; the material of the spiral electrode is stainless steel. The diameter of the spiral electrode designed in the present invention is 1mm, but not limited thereto.
所述的高压放电电源为交流电，输出电压为10～20kV，输出电流为300～400A，输出脉冲频率为200～400脉冲每秒，脉冲持续时间为10ns。The high-voltage discharge power supply is alternating current, the output voltage is 10-20kV, the output current is 300-400A, the output pulse frequency is 200-400 pulses per second, and the pulse duration is 10ns.
所述的鼓风机流速为6L·min-1，气体种类为空气。The flow rate of the blower is 6L·min -1 , and the gas type is air.
本发明方法的有益效果体现在：The beneficial effect of the inventive method is reflected in:
(1)改变传统的高压为螺旋，增大放电区域面积，对反应液充分曝气，保持高紊流状态，促进传质效率。(1) Change the traditional high pressure to a spiral, increase the area of the discharge area, fully aerate the reaction solution, maintain a high turbulent state, and promote mass transfer efficiency.
(2)通过将放电区的活性气体引入废水，充分利用放电过程产生的O3，提高放电等离子体的效率，同时减少O3二次污染。(2) By introducing the active gas in the discharge area into the waste water, the O 3 produced in the discharge process can be fully utilized to improve the efficiency of the discharge plasma and reduce the secondary pollution of O 3 .
(3)放电直接在水中进行，产生的活性物质直接与污染物反应。(3) The discharge is carried out directly in the water, and the active substances produced directly react with the pollutants.
(4)本发明装置运行稳定，方便管理，具有快速、安全、高效等优点，易于集成，在水处理领域具有较高的应用前景。(4) The device of the present invention operates stably, is convenient for management, has the advantages of fastness, safety, high efficiency, etc., is easy to integrate, and has a high application prospect in the field of water treatment.
附图说明Description of drawings
图1一种采用气相表面放电等离子体的污水处理装置结构示意图Figure 1 Schematic diagram of a sewage treatment device using gas-phase surface discharge plasma
其中，1—高压放电电源，2—出气口，3—进水口，4—接地极，5—鼓风机，6—进气口，7—螺旋电极，8—石英管，9—反应容器，10—曝气头，11—蠕动泵Among them, 1—high voltage discharge power supply, 2—air outlet, 3—water inlet, 4—ground electrode, 5—blower, 6—inlet, 7—spiral electrode, 8—quartz tube, 9—reaction vessel, 10— Aerator head, 11—peristaltic pump
具体实施方式detailed description
如图1，一种采用气相表面放电等离子体的污水处理装置，它包括高压放电电源1、反应容器9、设置在所述反应容器9内的石英管8和插入所述石英管8内的螺旋电极7，所述的螺旋电极7连接所述高压放电电源1的正极，所述石英管8的上端设有进气口6，下端连通有曝气头10，所述反应容器9的下部设有进水口3，上端设有出气口2。As shown in Fig. 1, a kind of sewage treatment device that adopts gas-phase surface discharge plasma, it comprises high-voltage discharge power source 1, reaction vessel 9, the quartz tube 8 that is arranged in described reaction vessel 9 and the screw that inserts in described quartz tube 8 electrode 7, the spiral electrode 7 is connected to the positive pole of the high-voltage discharge power supply 1, the upper end of the quartz tube 8 is provided with an air inlet 6, the lower end is connected with an aeration head 10, and the bottom of the reaction vessel 9 is provided with The water inlet 3 is provided with an air outlet 2 at the upper end.
所述的进气口6通过鼓风机5向石英管8内通入气体，所述的鼓风机5流速为6L·min-1，气体种类为空气。所述的进水口3通过蠕动泵11向所述的反应容器9内通入废水。所述的蠕动泵11设于所述反应容器9的下端，构成参数根据待处理液体的性质选定。所述反应容器9内的废水连接接地极4和所述高压放电电源1的负极。The air inlet 6 feeds gas into the quartz tube 8 through the blower 5 , the flow rate of the blower 5 is 6L·min −1 , and the gas type is air. The water inlet 3 feeds waste water into the reaction vessel 9 through a peristaltic pump 11 . The peristaltic pump 11 is arranged at the lower end of the reaction vessel 9, and its configuration parameters are selected according to the properties of the liquid to be treated. The waste water in the reaction vessel 9 is connected to the ground electrode 4 and the negative pole of the high voltage discharge power supply 1 .
所述的反应容器9为圆筒状，所述反应容器9的材质为有机玻璃。本发明设计的反应容器9的内径为8cm，高度为74cm，但不限于此。The reaction vessel 9 is cylindrical, and the material of the reaction vessel 9 is plexiglass. The reaction vessel 9 designed by the present invention has an inner diameter of 8 cm and a height of 74 cm, but it is not limited thereto.
所述螺旋电极7的外径与所述石英管8的内径相配合，紧贴所述石英管8的内壁；所述的螺旋电极7材质为不锈钢。本发明设计的螺旋电极7直径为1mm，但不限于此。The outer diameter of the spiral electrode 7 matches the inner diameter of the quartz tube 8 , and is close to the inner wall of the quartz tube 8 ; the material of the spiral electrode 7 is stainless steel. The spiral electrode 7 designed in the present invention has a diameter of 1mm, but it is not limited thereto.
所述的高压放电电源1为交流电，输出电压为10～20kV，输出电流为300～400A，输出脉冲频率为200～400脉冲每秒，脉冲持续时间为10ns。The high-voltage discharge power supply 1 is an alternating current with an output voltage of 10-20kV, an output current of 300-400A, an output pulse frequency of 200-400 pulses per second, and a pulse duration of 10ns.
采用本发明的装置净化处理污染水体的过程原理如下：预处理的水体通过蠕动泵11进入反应容器9中，与此同时，将高压放电电源1正极与螺旋电极7相连，将高压放电电源4负极与反应容器9内的废水相连，将石英管8浸入废水溶液中，将空气通过鼓风机5引入到石英管8中，螺旋电极7表面放电开始，并沿着石英管8在气相发生，具有活性物质空气通过设在所述石英管8下端的曝气头10曝气进入废水溶液中，这些活性物质与溶液中的污染物分子产生强烈地氧化反应，并伴有强烈的紫外光和高温，从而实现污染物的去除。当污染物被等离子降解时，可以在出气口2用注射针抽取水样检测降解效果，当降解效果不符合预期时，使蠕动泵11保持开启，重复处理待处理溶液，当降解完成后停止蠕动泵11，排出废水。反应中的高压放电电源1和蠕动泵11均可调，可针对不同的水质和处理要求灵活处理，从而实现对污水的高效处理。The process principle of adopting the device of the present invention to purify and treat polluted water is as follows: the pretreated water enters the reaction vessel 9 through the peristaltic pump 11, at the same time, the positive pole of the high-voltage discharge power supply 1 is connected to the spiral electrode 7, and the negative pole of the high-voltage discharge power supply 4 is connected. Connected with the wastewater in the reaction vessel 9, immerse the quartz tube 8 in the wastewater solution, introduce air into the quartz tube 8 through the blower 5, the surface discharge of the spiral electrode 7 starts, and occurs in the gas phase along the quartz tube 8, with active substances The air is aerated into the wastewater solution through the aeration head 10 arranged at the lower end of the quartz tube 8, and these active substances and the pollutant molecules in the solution have a strong oxidation reaction, accompanied by strong ultraviolet light and high temperature, so as to realize removal of pollutants. When the pollutants are degraded by plasma, you can use the injection needle at the air outlet 2 to take a water sample to detect the degradation effect. When the degradation effect is not as expected, keep the peristaltic pump 11 open, repeat the treatment of the solution to be treated, and stop the peristalsis when the degradation is completed. Pump 11 to discharge waste water. Both the high-voltage discharge power supply 1 and the peristaltic pump 11 in the reaction can be adjusted, and can be flexibly treated according to different water quality and treatment requirements, thereby realizing efficient treatment of sewage.
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