CN209835710U - Repair process device for micro-polluted underground water - Google Patents
Repair process device for micro-polluted underground water Download PDFInfo
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- CN209835710U CN209835710U CN201821903169.8U CN201821903169U CN209835710U CN 209835710 U CN209835710 U CN 209835710U CN 201821903169 U CN201821903169 U CN 201821903169U CN 209835710 U CN209835710 U CN 209835710U
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Abstract
The utility model discloses a restoration process units for pollute groundwater a little, including cylinder shell, plasma oxidation unit, photocatalyst, ultraviolet lamp, quartz glass safety cover. A spray gun of the plasma oxidation device sprays plasma from the spray gun through a pipeline and transmits the plasma into the plasma cylindrical container; the cylindrical container for storing the plasma is sleeved in the inner cavity of the cylindrical shell; a space is formed between the inner side wall of the cylindrical shell and the outer side wall of the cylindrical container for storing the plasma; the cylindrical cavity formed by the inner side wall of the cylindrical container for storing the plasma is a remediation tank body for treating micro-polluted underground water. The space between the outer side wall of the cylindrical container for storing the plasmas and the inner side wall of the cylinder is provided with a photocatalyst. The ultraviolet lamp is sleeved on the central shaft of the cylindrical container for storing the plasma. The device adopts plasma to activate the surface of the photocatalyst, thereby greatly slowing down the reduction rate of the activity of the photocatalyst. Therefore, the replacement frequency of the photocatalyst can be reduced, and the working time is saved.
Description
Technical Field
The invention relates to the field of water treatment, in particular to a remediation process device for micro-polluted underground water.
Background
Ground water pollution (ground water pollution) mainly refers to a phenomenon of quality degradation due to changes in chemical composition, physical properties and biological characteristics of ground water caused by human activities. Sources of groundwater pollution are mainly: industrial wastewater is directly discharged underground, contaminated surface water invades into underground aquifers, human and animal excreta or water contaminated by excessive use of pesticides permeates underground, and the like. Among them, agro-farming pollution is characterized by a large amount of wide range, using the biological or chemical conversion of incomplete nitrogen fertilizers into nitrates and nitrites while passing through the formation, followed by infiltration into the groundwater. Drinking this contaminated groundwater for a long period of time may cause cyanosis, esophageal cancer, etc.
Groundwater flow is extremely slow due to the complexity of the formations below the surface. Therefore, groundwater pollution has the characteristics of slow process, difficult discovery and difficult treatment. In addition, after the pollution source is eliminated, the surface water can be purified in a short period; groundwater, even if the source of contamination is eliminated, will have a long term adverse effect on contaminants that have entered the aquifer. Therefore, it is very important to restore polluted groundwater.
The traditional water treatment methods (such as physical method, chemical method and biological method) can improve the water quality to a certain extent, but all have respective defects or shortcomings. Wherein, the physical method utilizes the modes of adsorption, precipitation or obstruction to remove impurities. Such as classical activated carbon adsorption, can effectively purify water, but the carbon adsorption capacity is weakened continuously with the prolonging of time, and the carbon adsorption capacity needs to be cleaned and replaced regularly, and the carbon adsorption capacity can not degrade and oxidize organic pollutants, thereby possibly causing phase transfer and further worsening the problem. The chemical method includes oxidation treatment, neutralization treatment, coagulation treatment and the like, and has the capability of rapidly and effectively removing pollutants, but in actual operation, the problems of difficult recovery, easy generation of secondary pollution and the like can occur. In contrast, biological methods are one of the most popular water treatment technologies at present due to their economical efficiency and environmental friendliness, but when refractory organic substances or pollutants containing biological toxicity are present in polluted underground water, it is difficult to achieve a desired degradation effect by treating the wastewater with a biological method alone. And the improvement of the biological treatment effect is difficult to master and the uncertainty is very high.
The principle of the photocatalytic technology is to purify pollutants based on the oxidation-reduction capability of a photocatalyst under ultraviolet irradiation. The method has the advantages of novelty, high efficiency, no selectivity to wastewater and the like, is particularly suitable for the degradation of unsaturated hydrocarbon, has mild reaction conditions, does not cause secondary pollution, and has good application prospect. When the semiconductor powder catalyst exists in the organic wastewater, after the ultraviolet irradiation with certain intensity, a certain amount of active oxygen and free radicals in various forms can be generated in the system, and the active oxygen and the free radicals have higher oxidation potential, so that the active oxygen and the free radicals can react with organic matters and degrade the organic matters, and further mineralized into water and carbon dioxide, thereby achieving the purpose of treatment. In the photocatalysis process, a semiconductor material is used as a photocatalyst, and the reaction can be carried out at normal temperature and normal pressure. More importantly, the photocatalysis technology can degrade pollutants into nontoxic inorganic small molecular substances such as CO2、H2O and various corresponding inorganic ions to realize harmlessness, and provides a new and potential way for treating water pollution. In recent years, nano-photocatalysts have begun to exhibit headings that have unique advantages over traditional semiconductor materials.
The nanometer photocatalyst is a gram of pollutant, and the action mechanism of the nanometer photocatalyst is as follows: the nanometer photocatalyst is excited under the irradiation of light with specific wavelength to generate 'electron-hole' pair (a high-energy particle), which has strong oxidation and reduction capacity after acting with surrounding water and oxygen, and can decompose pollutant in sewage into harmless and odorless substances, destroy cell wall of bacteria, kill bacteria and decompose silk-screen thallus thereof, thereby achieving the purpose of eliminating pollutant. Selecting nano-grade TiO2As a photocatalytic oxidant, the photocatalyst has wide applicability for removing pollutants in water, and can be used for halogenated aliphatic hydrocarbon, dye, nitroaromatic hydrocarbon, polycyclic aromatic hydrocarbon, heterocyclic compound, hydrocarbon and phenol in waterCan be effectively degraded by organic compounds such as surfactant, pesticide, etc., and can generate CO by oxidation-reduction reaction with organic compounds under illumination condition2、H2O and other non-toxic inorganic substances. Compared with other n-type semiconductor nano-materials, the nano-TiO2Has the advantages of good chemical stability, large reaction activity and the like, and is an excellent photoelectric functional material. And the excellent catalytic performance of the catalyst is widely applied to the degradation of pollutants, and a satisfactory effect is achieved. However, as remediation of contaminated groundwater proceeds, the activity of the nano-photocatalyst may decrease linearly. Therefore, it is also important to find a way to slow the rate of decrease in the activity of the photocatalyst.
Plasma (plasma), also called plasma, is an ionized gaseous substance consisting of positive and negative ions generated by ionizing atoms and radicals from which part of electrons are deprived. The plasma oxidation technology is a novel water treatment technology, and researches show that the low-temperature plasma technology has very remarkable effects on realizing sewage purification and improving water quality. The plasma can generate particles such as an electric field, ultraviolet radiation, hydroxyl radicals, oxygen atoms and the like in different excitation states, can efficiently remove harmful substances such as microorganisms, bacteria and the like, and cannot generate new toxic substances. At present, in some developed countries, plasma water purification technology has been adopted to replace the traditional chlorination process water purification technology. The plasma oxidation technology and the nano photocatalytic oxidation technology are combined and used, and oxidized species generated by the plasma oxidation technology can degrade pollutants on one hand, and can activate the surface of the photocatalyst on the other hand, so that the reduction rate of the activity of the photocatalyst is slowed down.
Disclosure of Invention
1. The technical problem to be solved is as follows:
aiming at the technical current situation, the invention provides a remediation process device for micro-polluted underground water. The device introduces the plasma oxidation technology into the field of repairing micro-polluted underground water by adopting the nano photocatalysis technology. The excellent characteristics of the plasma are utilized to slow down the reduction rate of the activity of the photocatalyst in the photocatalytic reaction, and a high-efficiency and reliable purification module is established. This experiment is novel has slowed down the decline rate of photocatalyst activity on the one hand, and on the other hand can restore the groundwater that pollutes a little, and is significant to environmental water resource protection and soil groundwater pollution improvement.
2. The technical scheme is as follows:
a restoration process unit for slightly polluting groundwater is characterized in that: comprises a cylindrical shell, a plasma oxidation device, a photocatalyst, an ultraviolet lamp and a quartz glass protective cover.
The plasma oxidation device comprises a spray gun and a cylindrical container for storing plasma; the spray gun is positioned outside the cylindrical shell and transmits plasma sprayed by the spray gun into the plasma cylindrical container through a pipeline; the cylindrical container for storing the plasma is sleeved in the inner cavity of the cylindrical shell; a space is formed between the inner side wall of the cylindrical shell and the outer side wall of the cylindrical container for storing the plasma; the cylindrical shell and the cylindrical container for storing the plasma are arranged in a way of sharing a central axis; the cylindrical cavity formed by the inner side wall of the cylindrical container for storing the plasma is a remediation tank body for treating micro-polluted underground water.
And a photocatalyst is arranged in a space between the outer side wall of the cylindrical container for storing the plasma and the inner side wall of the cylinder.
The ultraviolet lamp is sleeved on the central shaft of the cylindrical container for storing the plasma; the surface of the ultraviolet lamp is wrapped by a quartz glass protective cover.
The device also comprises a wastewater inlet and a purified water outlet; the wastewater inlet penetrates through the cylindrical shell and the cylindrical container for storing the plasma to transmit wastewater into the device; the purified water outlet penetrates through the cylindrical container for storing the plasma and the cylindrical shell; and the wastewater inlet and the purified water outlet are both provided with valves.
Further, the cylindrical container for storing the plasma is made of high-temperature-resistant materials, and a plurality of through holes are formed in the outer wall of the cylindrical container.
Further, the distance between the outer wall of the cylindrical container for storing the plasma and the inner side wall of the cylindrical shell is 1-2 cm.
Further, theThe inner side wall of the cylindrical shell is coated with nano-grade TiO2A photocatalyst.
3. Has the advantages that:
(1) plasma can be sprayed on the surface of the photocatalyst through a specific structure in the device, and the surface of the photocatalyst can be activated through the plasma, so that the reduction rate of the activity of the photocatalyst is greatly reduced. Therefore, the replacement frequency of the photocatalyst can be reduced, and the working time is saved.
(2) The device has simple structure and convenient use, and is simple, convenient, time-saving, labor-saving, scientific and effective in operation when repairing the micro-polluted underground water. The completely repaired water can be directly discharged, and the method has important significance for environmental water resource protection and soil groundwater pollution improvement.
Drawings
FIG. 1 is an overall configuration view of the present apparatus;
FIG. 2 is a schematic diagram of the operation of the plasma in the apparatus.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in the attached figure 1, the repairing process device for the micro-polluted underground water is characterized in that: comprises a cylinder shell 3, a plasma oxidation device, a photocatalyst, an ultraviolet lamp 5 and a quartz glass protective cover 6.
The plasma oxidation device comprises a spray gun 7 and a cylindrical container 4 for storing plasma; the spray gun is positioned outside the cylindrical shell and transmits plasma sprayed by the spray gun into the plasma cylindrical container through a pipeline; the cylindrical container for storing the plasma is sleeved in the inner cavity of the cylindrical shell; a space is formed between the inner side wall of the cylindrical shell and the outer side wall of the cylindrical container for storing the plasma; the cylindrical shell and the cylindrical container for storing the plasma are arranged in a way of sharing a central axis; the cylindrical cavity formed by the inner side wall of the cylindrical container for storing the plasma is a remediation tank body 9 for treating micro-polluted underground water. When the plasma sprayed by the spray gun enters a container for storing the plasma, the plasma is sprayed out of the small hole of the container and then is mixed with the nano TiO22The contact of the photocatalyst surface and the activation of the photocatalyst surface can slow down the reduction rate of the photocatalyst activity. The micro-polluted underground water flows into a micro-polluted underground water remediation tank for treatment. Wherein 8 in the figure is the interface of the ultraviolet lamp connected with the industrial direct current power supply.
And a photocatalyst is arranged in a space between the outer side wall of the cylindrical container for storing the plasma and the inner side wall of the cylinder.
The ultraviolet lamp is sleeved on the central shaft of the cylindrical container for storing the plasma; the surface of the ultraviolet lamp is wrapped by a quartz glass protective cover. The quartz glass can well separate the ultraviolet lamp from the micro-polluted underground water, has extremely high spectral transmission, cannot be damaged by radiation rays, ensures that the ultraviolet light source can sufficiently irradiate the micro-polluted underground water, and improves the catalytic efficiency.
The device also comprises a waste water inlet 1 and a purified water outlet 11; the wastewater inlet penetrates through the cylindrical shell and the cylindrical container for storing the plasma to transmit wastewater into the device; the purified water outlet penetrates through the cylindrical container for storing the plasma and the cylindrical shell; the waste water inlet and the purified water outlet are both provided with valves 2 and 10. Wherein the valve controls the inlet and outlet of the water.
Further, the cylindrical container for storing the plasma is made of high-temperature-resistant materials, and a plurality of through holes are formed in the outer wall of the cylindrical container. The whole container is in a sealed state except for the small holes.
Further, the distance between the outer wall of the cylindrical container for storing the plasma and the inner side wall of the cylindrical shell is 1-2 cm.
Further, the inner side wall of the cylindrical shell is coated with nano-TiO 2 photocatalyst. Wherein the bottom surface and the top surface of the cylinder are not coated.
The method for treating the micro-polluted underground water in the device is photocatalytic oxidation treatment of ultraviolet light and a nano photocatalytic technology of a nano TiO2 photocatalyst for repairing the micro-polluted underground water. In order to slow down the reduction rate of the activity of the photocatalyst, the device is provided with a plasma oxidation device for carrying out plasma oxidation treatment on the activity of the photocatalyst.
The specific embodiment is as follows: the method for repairing the slightly polluted underground water comprises the following steps:
1) and opening a water inlet valve, and allowing the micro-polluted underground water to be repaired to enter the device.
2) Connecting an industrial direct-current power supply, turning on an ultraviolet lamp, and turning on a spray gun. The plasma sprayed from the spray gun enters the container for storing the plasma, and then is emitted from the small hole of the container to activate the surface of the photocatalyst.
3) At the nano-scale TiO2Under the catalytic action of the photocatalyst, the micro-polluted underground water is subjected to photocatalytic oxidation treatment. The plasma can activate the surface of the photocatalyst, and the activity of the photocatalyst is ensured to be reduced very slowly.
4) And opening a water outlet valve, and discharging the completely repaired water from the water outlet.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. A restoration process unit for slightly polluting groundwater is characterized in that: comprises a cylindrical shell, a plasma oxidation device, a photocatalyst, an ultraviolet lamp and a quartz glass protective cover;
the plasma oxidation device comprises a spray gun and a cylindrical container for storing plasma; the spray gun is positioned outside the cylindrical shell and transmits plasma sprayed by the spray gun into the plasma cylindrical container through a pipeline; the cylindrical container for storing the plasma is sleeved in the inner cavity of the cylindrical shell; a space is formed between the inner side wall of the cylindrical shell and the outer side wall of the cylindrical container for storing the plasma; the cylindrical shell and the cylindrical container for storing the plasma are arranged in a way of sharing a central axis; the cylindrical cavity formed by the inner side wall of the cylindrical container for storing the plasma is a remediation tank body for treating micro-polluted underground water;
a photocatalyst is arranged in a space between the outer side wall of the cylindrical container for storing the plasma and the inner side wall of the cylinder;
the ultraviolet lamp is sleeved on the central shaft of the cylindrical container for storing the plasma; the surface of the ultraviolet lamp is wrapped by a quartz glass protective cover;
the device also comprises a wastewater inlet and a purified water outlet; the wastewater inlet penetrates through the cylindrical shell and the cylindrical container for storing the plasma to transmit wastewater into the device; the purified water outlet penetrates through the cylindrical container for storing the plasma and the cylindrical shell; and the wastewater inlet and the purified water outlet are both provided with valves.
2. A remediation process unit for micro-polluted groundwater according to claim 1, wherein: the cylindrical container for storing the plasma is made of high-temperature-resistant materials, and the outer wall of the cylindrical container is provided with a plurality of through holes.
3. A remediation process unit for micro-polluted groundwater according to claim 1, wherein: the distance between the outer wall of the cylindrical container for storing the plasma and the inner side wall of the cylindrical shell is 1-2 cm.
4. A remediation process unit for micro-polluted groundwater according to claim 1, wherein: the inner side wall of the cylindrical shell is coated with nano-grade TiO2A photocatalyst.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821903169.8U CN209835710U (en) | 2018-11-19 | 2018-11-19 | Repair process device for micro-polluted underground water |
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| CN201821903169.8U CN209835710U (en) | 2018-11-19 | 2018-11-19 | Repair process device for micro-polluted underground water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109502686A (en) * | 2018-11-19 | 2019-03-22 | 江苏全给净化科技有限公司 | It is a kind of for the micro-polluted renovation technique device being lauched |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109502686A (en) * | 2018-11-19 | 2019-03-22 | 江苏全给净化科技有限公司 | It is a kind of for the micro-polluted renovation technique device being lauched |
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