WO2020238128A1 - 海砂净化系统 - Google Patents

海砂净化系统 Download PDF

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Publication number
WO2020238128A1
WO2020238128A1 PCT/CN2019/122756 CN2019122756W WO2020238128A1 WO 2020238128 A1 WO2020238128 A1 WO 2020238128A1 CN 2019122756 W CN2019122756 W CN 2019122756W WO 2020238128 A1 WO2020238128 A1 WO 2020238128A1
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tank
water
ozone
mixing
sea sand
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PCT/CN2019/122756
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English (en)
French (fr)
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李洪全
林国基
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中实泰广(北京)环保科技有限公司
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Publication of WO2020238128A1 publication Critical patent/WO2020238128A1/zh

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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
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • 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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
    • 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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
    • C02F1/4674—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation with halogen or compound of halogens, e.g. chlorine, bromine
    • 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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4676—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electroreduction
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/023—Chemical treatment
    • 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
    • C02F2101/10—Inorganic compounds
    • C02F2101/12—Halogens or halogen-containing compounds
    • 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
    • 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

Definitions

  • the embodiments of the present application relate to the technical field of sea sand purification, in particular to a sea sand purification system.
  • River sand is an important construction material, and the market demand is very large. At present, my country consumes more than 3 billion tons of construction sand every year.
  • sea sand contains salts such as magnesium chloride and sodium chloride (commonly known as chloride salt), when sea sand is used to mix concrete and pour buildings, the steel bars in the concrete will be slowly corroded and oxidized by the salt infiltrated by the sea sand, which is easy to cause construction Material strength, hardness and endurance decline, seriously affecting the service life of the building.
  • salts such as magnesium chloride and sodium chloride (commonly known as chloride salt)
  • the steel bars in the concrete will be slowly corroded and oxidized by the salt infiltrated by the sea sand, which is easy to cause construction Material strength, hardness and endurance decline, seriously affecting the service life of the building.
  • many construction companies are concerned about the corrosion of sea sand on the concrete steel bars, and they dare not use sea sand. Therefore, the effective removal of chloride ions is the key to sea sand desalination.
  • sea sand fresh water washing method steel rust inhibitor method, steel bar coating method, concrete ratio optimization method, etc.
  • sea sand fresh water washing method is the most commonly used Methods.
  • the fresh water washing method requires repeated washing with fresh water several times, which has problems such as low water resource utilization, high production costs, and high chloride ion content.
  • the traditional purification process of sea sand has great limitations.
  • the sea sand purification system includes:
  • An ozone water supply component used to provide ozone water for oxidation cleaning to the rotary wheel
  • the water supply component is connected to the rotary wheel through a water supply pipeline, and the ozone water supply component is connected to the rotary wheel through an ozone water delivery pipeline.
  • the revolving wheel includes a front revolving wheel, an intermediate revolving wheel and a rear revolving wheel, and a purification drum is arranged between the intermediate revolving wheel and the rear revolving wheel, and
  • the front slewing wheel is technologically connected to the intermediate slewing wheel
  • the intermediate slewing wheel is technologically connected to the rear slewing wheel through the purification drum
  • the water supply assembly is connected to the front slewing wheel through a water supply pipeline
  • the rotary wheel is connected to provide cleaning water for the front rotary wheel
  • the ozone water supply assembly is connected to the intermediate rotary wheel, the purification drum and the rear rotary wheel through the ozone water delivery pipeline.
  • Wheel connection is used to provide ozone water for oxidation cleaning to the intermediate rotating wheel, the purification drum and the rear rotating wheel.
  • the water supply assembly includes an electrolysis device and a reservoir, the water outlet of the reservoir is connected with a water supply pipeline, the water outlet of the front rotary wheel is connected with the electrolysis device, and the electrolysis The device is connected to the reservoir; the cleaning wastewater after cleaning in the front rotary wheel is transported to the electrolysis device for electrolysis treatment, and the cleaning wastewater after the electrolysis treatment is transported to the reservoir for storage; The front rotating wheel, the electrolysis device and the reservoir are connected to form a first circulation system.
  • the ozone water supply assembly includes a reaction mixing tank, a clean water replenishment tank, a main ozone generator, and a main gas-liquid mixing pump; the main ozone generator is connected to the clean water replenishment tank through a first jet.
  • the main gas-liquid mixing pump is connected to the reaction mixing tank and is formed for the circulation of the fluid in the reaction mixing tank.
  • the first ozone mixing circuit for increasing the content of ozone gas in the fluid the main ozone generator is arranged on the first ozone mixing circuit through a second jet, and the second jet is arranged on the main ozone generator
  • the front end of the inlet; the reaction mixing tank is connected with the intermediate rotating wheel, the purification drum and the rear rotating wheel through the ozone water delivery pipeline.
  • the present application also includes an auxiliary gas-liquid mixing pump and an auxiliary ozone generator;
  • the auxiliary gas-liquid mixing pump is connected to the reaction mixing tank and is formed for circulation of fluid in the reaction mixing tank and can assist in increasing
  • the second ozone mixing circuit for the content of ozone gas in the fluid the auxiliary ozone generator is arranged on the second ozone mixing circuit through a third jet, and the third jet is arranged at the inlet of the auxiliary ozone generator front end.
  • the application also includes an ozone water recovery system;
  • the ozone water recovery system includes a sedimentation tank, a dechlorination aeration tank connected with the sedimentation tank process, and a biological system connected with the dechlorination aeration tank process.
  • the clear water sedimentation and reuse tank is connected to the clear water replenishing tank.
  • a water quality filter tank for re-filtering the recovered ozone water is provided between the clear water sedimentation and reuse tank and the clear water replenishing tank.
  • the water quality filter tank includes a filter tank body, an in-tank filter device is arranged in the filter tank body, and the in-tank filter device divides its internal space into a pre-filtering chamber in the filter tank body and After filtration chamber; the clear water sedimentation reuse tank is connected with the pre-filtration chamber, and the post-filtration chamber is connected with the clean water replenishing tank.
  • the reaction mixing tank includes a reaction tank body, a mixing sheet is arranged in the reaction tank body, the mixing sheet is arranged obliquely in the reaction tank body, and mixing micropores are opened on the mixing sheet;
  • the mixing sheet divides its internal space into a circulation return space and a circulation output space in the reaction tank.
  • the circulation return space is connected to the outlet of the gas-liquid multiphase flow pump, and the circulation output space is connected to the gas The inlet connection of the liquid multiphase flow pump.
  • a reaction tank body water inlet is opened on the top of the reaction tank body, and the water outlet of the first jet is connected with the reaction tank body water inlet; in the reaction tank body and located in the mixing
  • a water distribution plate is arranged on the upper side of the sheet.
  • the sea sand purification system includes: a rotary wheel for rotating, stirring and cleaning sea sand; and a water supply assembly for providing cleaning water to the rotary wheel; An ozone water supply assembly for providing ozone water for oxidative cleaning to the rotary wheel; the water supply assembly is connected to the rotary wheel through a water supply pipeline, and the ozone water supply assembly is connected to the return through an ozone water delivery pipeline Runner connection.
  • the traditional sea sand purification process needs to use a lot of fresh water to be washed many times, and the chloride ion content is high, and the desalination effect is poor.
  • the new sea sand purification process proposed in this application greatly reduces the amount of fresh water, while effectively reducing the chloride ion content and improving the desalination effect.
  • Figure 1 is a schematic diagram of the structure of a sea sand purification system in an embodiment of the application
  • FIG. 2 is a schematic diagram of the structure of a reaction mixing tank in an embodiment of the application.
  • FIG. 3 is a schematic diagram of the structure of the water filter tank in the embodiment of the application.
  • Fig. 4 is a schematic diagram of the structure of the rotating wheel in the embodiment of the application.
  • Figure 1 is a schematic structural diagram of the sea sand purification system in an embodiment of the application
  • Figure 2 is a schematic structural diagram of the reaction mixing tank in an embodiment of the application
  • Figure 3 is an implementation of the application
  • FIG. 4 is a schematic diagram of the structure of the rotary wheel in the embodiment of the application.
  • the application discloses a sea sand purification system, which is used to realize the dechlorination and purification of sea sand.
  • the sea sand purification system includes the following components:
  • the rotary wheel includes a sand washing tank and a sand washing rotary wheel.
  • the sand washing rotary wheel is erected on the sand washing tank and driven by a power device to rotate on the sand washing tank.
  • the sand washing tank is filled with sea sand that needs to be purified, and at the same time, washing water is continuously provided in the sand washing tank. Under the action of the sand washing rotary wheel, the sea sand is washed, which is the preliminary purification of the sea sand .
  • the front rotary wheel 1 is used to wash the sea sand
  • the middle rotary wheel 2 and the rear rotary wheel 3 are used to realize the ozone water cleaning and purification of the sea sand.
  • the front rotary wheel 1 is technologically connected with the intermediate rotary wheel 2
  • the intermediate rotary wheel 2 is technologically connected with the rear rotary wheel 3 through the purification drum 4.
  • the water supply assembly is connected to the front rotary wheel 1 through a water supply pipeline to provide cleaning water for the front rotary wheel 1, and the ozone water supply assembly is connected to the intermediate rotary wheel 2 through the ozone water delivery pipeline.
  • the purification drum 4 and the rear rotating wheel 3 are connected to provide ozone water for oxidation cleaning to the intermediate rotating wheel 2, the purification drum 4 and the rear rotating wheel 3.
  • a purification drum 4 is further provided between the intermediate revolving wheel 2 and the rear revolving wheel 3, and the large particles of impurities in the sea sand are further removed by the purification drum 4.
  • the transfer of sea sand between the equipment can be realized by setting belt conveyors between the rotating wheels and between the rotating wheels and the purification drum 4.
  • the water supply component is a system for providing cleaning water to the front rotary wheel 1 in this application.
  • the water supply assembly includes an electrolysis device 5 and a reservoir, the water outlet of the reservoir is connected with a water supply pipeline, the water outlet of the front rotor 1 is connected with the electrolysis device 5, and the electrolysis device 5 is connected with the reservoir ;
  • the cleaning wastewater after cleaning in the front rotary wheel 1 is transported to the electrolysis device 5 for electrolysis treatment, and the cleaning wastewater after the electrolysis treatment is transported to the reservoir for storage; by the front rotary wheel 1, the electrolysis device 5 and The reservoir is connected to form a first circulation system.
  • the sea sand needs to be pretreated, that is, the sea sand is initially treated by a sieving machine, so that the large particles of impurities in the sea sand are cleaned up
  • the sieving machine has carried out preliminary cleaning of sea sand
  • the sea sand from the sieving machine still contains fine sediment, organic matter, chloride ions and other impurities (mostly harmful substances), and sea sand containing these impurities It enters the front rotary wheel 1 for water washing, and the washed aqueous solution also contains the same harmful substances.
  • this application proposes to install an electrolysis device 5 to recover the cleaned aqueous solution so that it can be reused.
  • the principle of setting the electrolysis device 5 is as follows: using the principle of electrochemistry, when the sea sand washing water containing harmful substances passes through the electrolysis device 5, the harmful substances in the solution undergo chemical oxidation-reduction and decomposition reactions, and are converted into some harmless substances; After electrolysis, chloride ions can be converted into sodium hypochlorite and CL2.
  • Sodium hypochlorite has an oxidizing function and can decompose organic matter in water in one step, while chlorine is separated from the water by electrolyzed hydrogen and oxygen and volatilized into space.
  • its physical effects such as flocculation, co-sedimentation, bubble floating, etc.
  • the sand washing water purified by electrolysis contains hydrogen, oxygen and free radicals with high oxidizing ability. It is reused as the cleaning water for the first-stage rotary wheel. Compared with fresh water cleaning, it can significantly improve the sea sand Cleaning indicators.
  • Electrochemical treatment of wastewater does not require chemicals. Therefore, in this process, electrolyzed water is used to clean sea sand, which improves the cleaning efficiency of sea sand and saves fresh water resources.
  • the electrolysis device 5 includes an electrolytic cell.
  • a positive plate and a negative plate are arranged in the electrolytic cell.
  • the positive plate is connected to the positive electrode of the power source, and the negative plate is connected to the negative electrode of the power source.
  • the solution in the electrolytic cell can undergo oxidation and reduction reactions on the positive plate and the negative plate, respectively, after being energized.
  • One positive plate and one negative plate are a set, and multiple groups of positive and negative plates can be set in one electrolytic cell at the same time to improve electrolysis efficiency.
  • the electrolysis method is to treat wastewater containing organic matter. It is to inject the wastewater into an electrolytic cell. Under the action of direct current, the organic matter undergoes electrochemical or chemical redox on the two electrodes or in the solution, decomposing or transforming into some harmless substances; Some physical and chemical effects in the electrolytic cell (such as flocculation, co-sedimentation, bubble floating, etc.) separate organic matter from the wastewater to purify it. Electrochemical treatment of wastewater generally does not require a lot of chemicals, and the post-treatment is simple, and is called a clean treatment method.
  • the mechanism of electrolytic treatment is to use electrodes to decompose H 2 O under the action of an electric field to produce hydroxyl radicals ( ⁇ OH groups) with strong oxidizing ability, thereby decomposing many difficult-to-degrade organics into CO 2 or other simple compounds.
  • the electrochemical reaction mechanism is that the H 2 O in the solution discharges on the anode and forms adsorbed hydroxide radicals: formula (1) MOx+H 2 O--MOX( ⁇ OH)+H+ + e. (MOX is an oxidation electrode). Then the adsorbed hydroxyl radicals react with the existing oxygen on the anode and transfer the oxygen in the hydroxyl radicals to the metal oxide lattice to form high-valent oxides: formula (2) MOX( ⁇ OH)--MOx +H+ + e.
  • reaction proceeds according to the following formula: formula (3) MOx( ⁇ OH)--MOx+l/20 2+ ⁇ r+e; formula (4) MOx-oMOx+i/20 2 . If there are oxidizable organics in the solution, the reaction proceeds according to the following formula: formula (5) R+MOx( ⁇ OH):-CO 2 + 2H + 2 + e-+ MOx (R is organic pollutants); (6) R+M0x+1—, RO+MOx.
  • the current efficiency mainly depends on the rate ratio of the reaction formulas (5) and (3); when formulas (2) and formulas (6)
  • the non-biodegradable organic matter is transformed into biodegradable organic matter, that is, the oxidation products of oxygen in the high-valence oxide lattice are mainly organic acids, quinones and other organic matter.
  • the concentration of oxygen vacancies in the metal oxide lattice must be high enough to make the adsorbed state ⁇ OH produced by the anode quickly transfer to the metal oxide lattice, that is, the speed of the reaction formula (2) Faster than formula (1)
  • the current efficiency mainly depends on the reaction rate ratio of formula (6) and formula (4); the current efficiency of the above two reactions is related to the electrode material, and formula (4)(5) is also related to the anode potential . Therefore, the selection of suitable electrode materials is the key to the treatment of organic wastewater by electrolytic oxidation technology.
  • the ozone water supply assembly includes a reaction mixing tank 6, a clean water make-up tank 7, a main ozone generator 8 and a main gas-liquid mixing pump 9.
  • the main ozone generator 8 has an ozone output pipeline, and two output branches are connected to the ozone output pipeline.
  • One of the output branches is connected with a first jet, which is connected with the clean water make-up tank 7 through the first The jet can initially mix clean water and ozone gas.
  • the first jet is connected to the reaction mixing tank 6 and is used to deliver a gas-liquid mixed fluid containing ozone gas and clean water into the reaction mixing tank 6.
  • the gas-liquid mixing pump is a mixing device that can mix gas and liquid.
  • the main gas-liquid mixing pump 9 is connected to the reaction mixing tank 6 and is formed to circulate the fluid in the reaction mixing tank 6 and increase the ozone gas content in the fluid.
  • the first ozone mixing circuit is a mixing device that can mix gas and liquid.
  • the liquid in the reaction mixing tank 6 can be circulated under the action of the main gas-liquid multiphase flow pump. Each time the liquid mixed with ozone gas passes through the main gas-liquid multiphase flow pump, it can be compressed to increase the ozone gas in the liquid. The dissolution rate.
  • another branch set on the main ozone generator 8 is set to the first ozone mixing circuit by setting a second jet, specifically, the first The two jets are arranged at the entrance front end of the main ozone generator 8.
  • the liquid in the reaction mixing tank 6 is saturated ozone water.
  • the saturated ozone water passes from the reaction mixing tank 6 through the ozone water transport pipeline and the intermediate rotary wheel 2, the purification drum 4 And the rear slewing wheel 3 is connected.
  • the application also provides a set of auxiliary gas-liquid mixing pump 10 and auxiliary ozone generator 11.
  • the auxiliary gas-liquid mixing pump 10 is connected to the reaction mixing tank 6 and forms a second ozone mixing circuit for circulating fluid in the reaction mixing tank 6 and assisting in increasing the content of ozone gas in the fluid.
  • the auxiliary ozone generator 11 passes through the second ozone mixing circuit.
  • the three jets are arranged on the second ozone mixing circuit, and the third jets are arranged on the inlet front end of the auxiliary ozone generator 11.
  • the reaction mixing tank 6 is a container device that realizes the temporary storage of ozone water and further fully dissolves ozone gas in this application.
  • the present application designs the reaction mixing tank 6 as a high-pressure tank. Under the action of high pressure, the overflow rate of ozone gas can be reduced.
  • the specific structure of the reaction mixing tank 6 is as follows: the reaction mixing tank 6 includes a reaction tank body, and the reaction tank body is preferably a stainless steel tank; a mixing sheet 15 is provided in the reaction tank body, and the mixing sheet 15 is a metal The mixing sheet 15 is arranged obliquely in the reaction tank.
  • the mixing sheet 15 is provided with mixing micropores. The pore diameter of the mixing micropores is in the range of 1-3mm; the mixing sheet 15 divides its internal space into the circulation space in the reaction tank.
  • the circulation output space the circulation return space is connected with the outlet of the gas-liquid multiphase flow pump, and the circulation output space is connected with the inlet of the gas-liquid multiphase flow pump;
  • the top of the reaction tank is provided with a reaction tank body water inlet, the first jet
  • the water outlet of the reactor is connected with the water inlet of the reaction tank body;
  • a water distribution plate 16 is provided in the reaction tank body and located on the upper side of the mixing plate 15.
  • the inside of the mixing reaction tank is provided with a stainless steel water distribution plate 16 and multiple sets of stainless steel strong mixing sheets (mixing sheets 15).
  • the function of the water distribution plate 16 is mainly to make the water entering the mixing reaction tank evenly dispersed and flow to the entire tank body without causing short water flow.
  • the stainless steel strong mixing sheet has numerous micropores with a diameter of 1-2mm on the surface. Its function is to increase the contact area between water and ozone gas, further improve the water quality of the circulating water body, and ensure that the ozone content in the ozone water in the tank is always saturated and dissolved. .
  • the ozone water recovery system 12 is used to recover the ozone water after participating in the purification of sea sand to realize its secondary utilization, so as to reduce the waste of water resources.
  • the ozone water recovery system 12 includes a sedimentation tank, a dechlorination aeration tank connected with the sedimentation tank process, a biological purification tank connected with the dechlorination aeration tank process, and a clear water sedimentation recovery tank connected with the biological purification tank process. Use pool.
  • the sedimentation tank is connected to the intermediate rotating wheel 2, the purification drum 4 and the rear rotating wheel 3 through the ozone water recovery pipeline, and the clear water sedimentation reuse pool is connected to the clear water replenishing tank 7.
  • the main function of the water filter tank 13 is to achieve high efficiency filtration of the recovered ozone water.
  • a water quality filter tank 13 for re-filtering the recovered ozone water is provided between the clear water sedimentation reuse tank and the clear water supplement tank 7.
  • the water quality filter tank 13 includes a filter tank body, and an in-tank filter device 14 is arranged in the filter tank body.
  • the in-tank filter device 14 divides its internal space into a pre-filtering chamber and a post-filtering chamber in the filter tank;
  • the clear water sedimentation reuse tank is connected to the pre-filtering chamber, and the post-filtering chamber is connected to the clear water make-up tank 7.
  • the structure of the filter device 14 in the tank includes a filter cloth bag, and the filter cloth bag is filled with quartz sand from bottom to top to form a quartz sand filter layer and activated carbon to form an activated carbon filter layer.
  • the liquid that needs to be filtered enters from the lower layer of the water quality filter tank 13, is purified after passing through the filter device 14 in the tank, and then is output from the upper layer of the water quality filter tank 13.
  • the water quality filter tank 13 is provided with an in-tank filter device 14 which has a filter cloth bag.
  • the filter cloth bag is equipped with a quartz sand filter layer for filtering fine particles and a filter layer for adsorbing organic matter dissolved in the water.
  • the waste water with fine particles is filtered out on the quartz sand filter layer and enters The activated carbon filter layer with high adsorption capacity, through the super specific surface area formed by the countless pores in the activated carbon, adsorbs the organics and chlorides in the wastewater in the pores to purify the wastewater.
  • the purified water evenly passes through the water outlet plate 16 and is discharged from the upper outlet of the water quality filter tank 13. Adopting the filtering method of water inlet from the bottom and water outlet from the top is not easy to cause clogging of the filter layer and prolongs the filtering cycle.
  • the traditional filtering methods are basically the upper water inlet and the lower water outlet, which will easily cause the suspended matter to accumulate on the upper part of the filter layer, which requires frequent backwashing.
  • the filter cloth bag After the filter cloth bag is opened, it has a funnel-shaped structure. After the filter cloth bag is opened, its cone angle is about 45°. This kind of filter layer structure stacked at 45° makes the replacement of the filter material compared to the traditional filter layer structure Very easy.
  • the influence of the concentration of ozone water on the chloride ion content of sea sand at a water temperature of 22°C, deionized water is used.
  • deionized water is used.
  • the ozone gas is introduced and mixed by a high-efficiency mixing device for 4 minutes, the ozone water concentration reaches saturation, and the saturation concentration is 40.5mg/L.
  • the concentration of ozone water increases, the chloride ion content of sea sand after treatment continues to decrease.
  • the water temperature is 22°C and the concentration of ozone water is 40.5mg/L, the chloride ion content of sea sand ⁇ 0.0018 %.
  • ozone should be continuously introduced during the sea sand purification process to keep the ozone water in a saturated high concentration state and improve the purification effect .
  • the electrode reaction formula of the above reaction is as follows:
  • reaction potential E is greater than 0, so these two reactions can occur spontaneously. Therefore, in the sea sand purification process, an efficient method is used to volatilize Cl 2 away, which is conducive to the occurrence of reaction (11), thereby effectively removing chloride ions in the sea sand and improving the sea sand purification effect.
  • the maximum concentration of ozone can reach 40.5mg/L after 4 minutes of infusion, and as the concentration of ozone water increases, the chloride ion content of the sea sand after treatment continues to decrease.
  • the concentration of ozone water decays with time.
  • the ozone water is easier to decompose in a high concentration state, and it rapidly drops to about 50% of the original concentration within the first 30 minutes, and then the degradation rate slows down.
  • the new sea sand purification process can effectively reduce the chloride ion content of sea sand.
  • the best treatment process for sea sand desalination is: the concentration of ozone water is 40.5mg/L, during the sand washing process Dosing in 3 points, the chloride ion content of the sea sand after purification treatment can be less than 0.0018%.
  • the chloride ion content of qualified construction sand should be controlled at ⁇ 0.06%. Therefore, the performance of sea sand after purification treatment has reached the standard for construction sand.
  • the traditional sea sand purification process needs to use a lot of fresh water to be washed many times, and the chloride ion content is high, and the desalination effect is poor.
  • the new sea sand purification process proposed in this application greatly reduces the amount of fresh water, while effectively reducing the chloride ion content and improving the desalination effect.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Ceramic Engineering (AREA)
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  • Treatment Of Water By Oxidation Or Reduction (AREA)

Abstract

一种海砂净化系统，包括：用于对海砂进行回转搅拌清洗的回转轮，用于对回转轮提供清洗用水的供水组件，用于对回转轮提供氧化清洗用臭氧水的臭氧水供给组件；该供水组件通过供水管路与该回转轮连接，该臭氧水供给组件通过臭氧水输送管路与该回转轮连接。相比于传统海砂净化方式而言，该海砂净化系统不仅能够实现对海砂的水洗作业，同时还能够利用臭氧水，对海砂中的氯离子进行高效去除。

Description

海砂净化系统
本申请要求于2019年5月29日提交中国专利局、申请号为201910459463.7申请名称为海砂净化系统的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及海砂净化技术领域，具体涉及一种海砂净化系统。
背景技术
河砂是一种重要的建筑材料，市场需求量非常大，目前我国每年消耗30亿吨以上的建筑用砂。
随着我国经济的快速发展，建设规模的日益扩大，特别是东南沿海地区城市进程的快速推进，导致很多沿海城市面临河砂资源枯竭的困境，许多地方已经出现河砂资源匮乏的现象。同时，为防止对自然景观和生态环境的严重破坏，各地已逐渐限制开采河砂。在我国东部沿海地区，人口稠密，经济发达，工程建设量大，当河砂资源出现供给不足问题，同时又没有其他砂源替代的情况下，开发利用当地的海砂资源成为经济发展的客观需要和历史发展的必然。因此，在沿海地区合理利用海砂资源，以缓解河砂资源不足的局面显得日益迫切。
然而，由于海砂含有氯化镁、氯化钠等盐份(俗称氯盐)，使用海砂搅拌混凝土、浇灌建筑物，混凝土中的钢筋会慢慢被海砂渗透出来的盐分腐蚀氧化，容易造成建筑物强度、硬度及承受力下降，严重影响建筑物的使用寿命。目前很多建筑企业担心海砂对混凝土钢筋的腐蚀，尚不敢使用海砂。因此，对氯离子的有效去除是海砂淡化的关键。
目前，国内外针对海砂中氯盐除去的最新技术措施主要有：海砂淡水冲洗法、钢筋阻锈剂法、钢筋镀膜法、混凝土配比优化法等，其中海砂淡水冲洗法是最为常用的方法。但淡水冲洗法需多次使用淡水重复冲洗，存在水资源利用率低，生产成本高，氯离子含量高等问题，尤其是在淡水资源缺乏的地区，海砂的传统净化工艺存在很大局限性。
申请内容
针对传统海砂淡化方法和工艺所存在的问题，如何提供一种能够提高海砂净化效率的海砂净化系统，成为了本领域技术人员亟待解决的问题。
为了实现上述目的，本申请实施例提供如下技术方案：
本申请实施例提供了一种海砂净化系统，在本申请中，该海砂净化系统包括：
用于对海砂进行回转搅拌清洗的回转轮；
用于对回转轮提供清洗用水的供水组件；
用于对回转轮提供氧化清洗用臭氧水的臭氧水供给组件；
所述供水组件通过供水管路与所述回转轮连接，所述臭氧水供给组件通过臭氧水输送管路与所述回转轮连接。
优选地，所述回转轮包括有前置回转轮、中间回转轮以及后置回转轮，所述中间回转轮与所述后置回转轮之间设置有净化滚筒，所述前置回转轮与所述中间回转轮工艺衔接，所述中间回转轮通过所述净化滚筒与所述后置回转轮工艺衔接；所述供水组件通过供水管路与所述前置回转轮连接、用于对所述前置回转轮提供清洗用水，所述臭氧水供给组件通过臭氧水输送管路与所述中间回转轮、所述净化滚筒以及所述后置回转轮连接、用于对所述中间回转轮、所述净化滚筒以及所述后置回转轮提供氧化清洗用臭氧水。
优选地，所述供水组件包括有电解装置以及蓄水池，所述蓄水池的 出水口连接有供水管路，所述前置回转轮的出水口与所述电解装置连接，所述电解装置与所述蓄水池连接；所述前置回转轮中清洗后的清洗废水输送至电解装置中进行电解处理，电解处理后的清洗废水输送至所述蓄水池中储存备用；由所述前置回转轮、所述电解装置以及所述蓄水池连接形成有第一循环系统。
优选地，所述臭氧水供给组件包括有反应混合罐、清水补水罐、主臭氧发生器以及主气液混合泵；所述主臭氧发生器通过第一射流器与所述清水补水罐连接、用于向所述反应混合罐内输送包含有臭氧气体以及清水的气液混合流体；所述主气液混合泵与所述反应混合罐连接并形成有用于所述反应混合罐内流体循环流通并可增加流体内臭氧气体含量的第一臭氧混合回路，所述主臭氧发生器通过第二射流器设置于所述第一臭氧混合回路上，所述第二射流器设置于所述主臭氧发生器的进口前端；所述反应混合罐通过所述臭氧水输送管路与所述中间回转轮、所述净化滚筒以及所述后置回转轮连接。
优选地，本申请还包括有辅助气液混合泵以及辅助臭氧发生器；所述辅助气液混合泵与所述反应混合罐连接并形成有用于所述反应混合罐内流体循环流通并可辅助增加流体内臭氧气体含量的第二臭氧混合回路，所述辅助臭氧发生器通过第三射流器设置于所述第二臭氧混合回路上，所述第三射流器设置于所述辅助臭氧发生器的进口前端。
优选地，本申请还包括有臭氧水回收系统；所述臭氧水回收系统包括有沉淀池、与所述沉淀池工艺衔接的脱氯曝气池、与所述脱氯曝气池工艺衔接的生物净化池、与所述生物净化池工艺衔接的清水沉淀回用池；所述沉淀池通过臭氧水回收管路与所述中间回转轮、所述净化滚筒以及所述后置回转轮连接，所述清水沉淀回用池与所述清水补水罐连接。
优选地，于所述清水沉淀回用池与所述清水补水罐之间还设置有用于对回收的臭氧水进行再次过滤的水质过滤罐。
优选地，所述水质过滤罐包括有过滤罐体，于所述过滤罐体内设置有罐内过滤装置，所述罐内过滤装置在所述过滤罐体内将其内部空间分 为过滤前腔室以及过滤后腔室；所述清水沉淀回用池与所述过滤前腔室连接，所述过滤后腔室与所述清水补水罐连接。
优选地，所述反应混合罐包括有反应罐体，于所述反应罐体内设置有混合片，所述混合片于所述反应罐体内倾斜设置，于所述混合片上开设有混合微孔；所述混合片于所述反应罐体内将其内部空间分为循环回流空间以及循环输出空间，所述循环回流空间与所述气液多相流泵的出口连接，所述循环输出空间与所述气液多相流泵的进口连接。
优选地，于所述反应罐体的顶部开设有反应罐体进水口，所述第一射流器的出水口与所述反应罐体进水口连接；于所述反应罐体内、并位于所述混合片的上侧设置有布水板。
本申请实施例具有如下优点：
本申请公开了一种海砂净化系统，在本申请中，该海砂净化系统包括：用于对海砂进行回转搅拌清洗的回转轮；用于对回转轮提供清洗用水的供水组件；用于对回转轮提供氧化清洗用臭氧水的臭氧水供给组件；所述供水组件通过供水管路与所述回转轮连接，所述臭氧水供给组件通过臭氧水输送管路与所述回转轮连接。通过上述结构设计，相比于传统海砂净化方式而言，本申请不仅能够实现对海砂的水洗作业，同时还能够利用臭氧水，对海砂中的氯离子进行高效去除。传统的海砂净化工艺需要使用大量的淡水经过多次冲洗，而且氯离子含量较高，淡化效果较差。本申请提出的海砂净化处理新工艺大大减少了淡水的用量，同时能有效降低氯离子含量，提高淡化效果。
附图说明
为了更清楚地说明本申请的实施方式或现有技术中的技术方案，下面将对实施方式或现有技术描述中所需要使用的附图作简单地介绍。显而易见地，下面描述中的附图仅仅是示例性的，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图引申获 得其它的实施附图。
本说明书所绘示的结构、比例、大小等，均仅用以配合说明书所揭示的内容，以供熟悉此技术的人士了解与阅读，并非用以限定本申请可实施的限定条件，故不具技术上的实质意义，任何结构的修饰、比例关系的改变或大小的调整，在不影响本申请所能产生的功效及所能达成的目的下，均应仍落在本申请所揭示的技术内容得能涵盖的范围内。
图1为本申请实施例中海砂净化系统的结构示意简图；
图2为本申请实施例中反应混合罐的结构示意简图；
图3为本申请实施例中水质过滤罐的结构示意简图；
图4为本申请实施例中回转轮的结构示意简图；
在图1至图3中，部件名称与附图标记的对应关系为：
前置回转轮1、中间回转轮2、后置回转轮3、净化滚筒4、电解装置5、反应混合罐6、清水补水罐7、主臭氧发生器8、主气液混合泵9、辅助气液混合泵10、辅助臭氧发生器11、臭氧水回收系统12、水质过滤罐13、罐内过滤装置14、混合片15、布水板16。
具体实施方式
以下由特定的具体实施例说明本申请的实施方式，熟悉此技术的人士可由本说明书所揭露的内容轻易地了解本申请的其他优点及功效，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
请参考图1至图4，其中，图1为本申请实施例中海砂净化系统的结构示意简图；图2为本申请实施例中反应混合罐的结构示意简图；图3为本申请实施例中水质过滤罐的结构示意简图；图4为本申请实施例中回转轮的结构示意简图。
本申请公开了一种海砂净化系统，用于实现海砂的除氯净化。
在本申请中，该海砂净化系统包括有如下组成部分：
1、回转轮
回转轮包括有洗砂水槽以及洗砂回转轮，洗砂回转轮架设在洗砂水槽上，通过动力装置驱动其在洗砂水槽上转动。在洗砂水槽内装入需要进行净化的海砂，同时向洗砂水槽内持续不断地提供清洗用水，在洗砂回转轮的作用下，实现海砂的水洗，该水洗为海砂的初步净化。
在本申请中，回转轮共设置有三台，分别为前置回转轮1、中间回转轮2以及后置回转轮3。前置回转轮1用于实现海砂的水洗，中间回转轮2以及后置回转轮3用于实现海砂的臭氧水清洗净化。前置回转轮1与中间回转轮2工艺衔接，中间回转轮2通过净化滚筒4与后置回转轮3工艺衔接。
在本申请中，供水组件通过供水管路与前置回转轮1连接、用于对前置回转轮1提供清洗用水，臭氧水供给组件通过臭氧水输送管路与中间回转轮2、净化滚筒4以及后置回转轮3连接、用于对中间回转轮2、净化滚筒4以及后置回转轮3提供氧化清洗用臭氧水。
在本申请的一个实施方式中，在中间回转轮2以及后置回转轮3之间还设置了净化滚筒4，通过净化滚筒4对海砂中的大颗粒杂质进行进一步地去除。
由于设置了三台回转轮以及一台净化滚筒4，回转轮之间以及回转轮与净化滚筒4之间可以通过设置皮带输送带实现海砂在设备之间的转移。
需要说明的是：在现有技术中，任何能够实现砂砾水洗净化的设备都能够替代回转轮应用到本申请中。
2、供水组件
供水组件为本申请中对前置回转轮1提供清洗用水的系统。
具体地，供水组件包括有电解装置5以及蓄水池，蓄水池的出水口连接有供水管路，前置回转轮1的出水口与电解装置5连接，电解装置5与蓄水池连接；前置回转轮1中清洗后的清洗废水输送至电解装置5中进行电解处理，电解处理后的清洗废水输送至蓄水池中储存备用；由前 置回转轮1、电解装置5以及蓄水池连接形成有第一循环系统。
本申请在将海砂输送至前置回转轮1进行水洗操作前，需要对海砂进行预处理，即通过分筛机对海砂进行初步处理，以使得海砂中的大颗粒杂质得到清理，虽然分筛机对海砂进行了初步清理，但是，从分筛机出来的海砂仍然含有细小的泥沙、有机物、氯离子等杂质(多数为有害物质)，包含有这些杂质的海砂进入到前置回转轮1中进行水洗，清洗后的水溶液中，同样含有相同的有害物质。
为了降低水资源的消耗，本申请提出了设置电解装置5，对清洗后的水溶液进行回收处理，以便于其能够进行二次利用。
设置电解装置5的原理如下：利用电化学的原理，当含有害物质的海砂清洗水经过电解装置5时，溶液中的有害物质发生化学氧化还原、分解反应，转化成一些无害物质；如氯离子经电解后，可转变为次氯酸钠和CL2，次氯酸钠具有氧化功能，可经一步分解水体里的有机物，而氯气则通过电解出来的氢气和氧气从水体里分离出来，挥发到空间。同时其物理作用(如絮凝、共沉、气泡上浮等)可将有机物、细小的泥沙从废水中分离出去使其净化。
经电解净化后的洗砂用水，因含有氢气、氧气和氧化能力很高的自由基，再次用作第一级回转轮的清洗用水，相比用淡水清洗而言，可显著提高海砂的清洗指标。
电化学法处理废水无需化学药剂，因此，在此道工艺用电解水清洗海砂，即提高了海砂的清洗效率，同时节约了淡水资源。
在本申请中，电解装置5包括有电解池，在电解池内设置有正极板以及负极板，正极板连接电源正极，负极板连接电源负极，将正极板以及负极板相对且保留一定间隔后设置到电解池中，通电后，电解池中的溶液就能够分别在正极板以及负极板上进行氧化、还原反应。一个正极板以及一个负极板为一组，在一个电解池内，可以同时设置多组正负极板，以提高电解效率。
在本申请中，电解降解海砂清洗用水有机物的原理如下：
电解方法处理含有机物的废水，是将废水注入电解池中，在直流电的作用下，有机物在两电极上或溶液中发生电化学或化学氧化还原，分解或转化成一些无害物质；也可以通过电解池中的一些物理化学作用(如絮凝、共沉、气泡上浮等)将有机物从废水中分离出去使其净化。电化学法处理废水一般无需很多化学药剂，后处理简单，被称为清洁处理法。
电解方法处理其机理是利用电极在电场作用下，分解H 2O产生具有强氧化能力的羟基自由基(·OH基团)，从而使许多难以降解的有机物分解为CO 2或其它简单化合物。
电化学反应机理是首先溶液中的H 2O，在阳极上放电并形成吸附态的氢氧自由基：公式(1)MOx+H 2O--MOX(·OH)+H+ +e。(MOX为氧化电极)。然后吸附态氢氧自由基和阳极上现存的氧反应，并把氢氧自由基中的氧转移到金属氧化物晶格而形成高价态氧化物：公式(2)MOX(·OH)--MOx+H+ +e。
如果没有任何氧化的有机物，则反应按下述公式进行：公式(3)MOx(·OH)--MOx+l/20 2+}r+e；公式(4)MOx-oMOx+i/20 2。如果溶液中存在可氧化的有机物，则反应按下述公式进行：公式(5)R+MOx(·OH)：一CO 2+2H+2 +e一+MOx(R为有机污染物)；公式(6)R+M0x+1—，RO+MOx。
从上式可以看出，两种活性氧对有机物的氧化效果是不同的，公式(5)的反应高效进行时，表现为非生化降解有机物深度氧化分解，即吸附态·OH主要氧化产物为CO和H 2O。为使反应公式(4)(5)快速进行，阳极表面必须存在高浓度的吸附态·OH，电流效率主要取决于反应公式(5)和(3)的速率比；当公式(2)和公式(6)高效进行时，表现为非生化降解有机物转化为可生化降解有机物，即高价态氧化物晶格中的氧的氧化产物主要是一些有机酸、醌等有机物。为使公式(6)快速进行，金属氧化物晶格中的氧空位浓度必须足够高，使阳极产生的吸附态·OH迅速转移到金属氧化物晶格中，即反应公式(2)的速度要比公式(1)快，电流效率主要取决于公式(6)公式(4)的反应速率比；上述两种反应的电流效率均与 电极材料有关，公式(4)(5)还与阳极电位有关。因此，选择合适的电极材料是电解氧化技术处理有机废水的技术关键。为了提高·OH集团氧化有机物的效率，必须防止副反应公式(3)和公式(4)，即限制氧气的析出，因此必须控制好反应条件，如反应温度，溶液Ph值和反应的电流密度，选择较高电位的电极能很好的抑制氧气的析出。
3、臭氧水供给组件
臭氧水供给组件包括有反应混合罐6、清水补水罐7、主臭氧发生器8以及主气液混合泵9。
主臭氧发生器8具有一条臭氧输出管路，臭氧输出管路上连接有两条输出支路，其中一条输出支路连接有第一射流器，第一射流器与清水补水罐7连接，通过第一射流器能够将将清水以及臭氧气体进行初步混合，第一射流器与反应混合罐6进行连接、用于向反应混合罐6内输送包含有臭氧气体以及清水的气液混合流体。
气液混合泵是一台能够将气体以及液体进行混合的混合设备，主气液混合泵9与反应混合罐6连接并形成有用于反应混合罐6内流体循环流通并可增加流体内臭氧气体含量的第一臭氧混合回路。
反应混合罐6内的液体能够在主气液多相流泵的作用下进行循环，混合有臭氧气体的液体每次经过主气液多相流泵时，能够受到压缩作用提高臭氧气体在液体中的溶解率。
为了对主气液多相流泵提供充足的臭氧气体，本申请中，主臭氧发生器8上设置的另一条支路通过设置第二射流器设置到第一臭氧混合回路上，具体地，第二射流器设置于主臭氧发生器8的进口前端。
经过主气液多相流泵的循环混合作用，反应混合罐6内的液体为饱和臭氧水，饱和臭氧水从反应混合罐6内通过臭氧水输送管路与中间回转轮2、净化滚筒4以及后置回转轮3连接。
为了进一步提高饱和臭氧水的生产效率，本申请还提供了一套辅助气液混合泵10以及辅助臭氧发生器11。具体地，辅助气液混合泵10与反应混合罐6连接并形成有用于反应混合罐6内流体循环流通并可辅助 增加流体内臭氧气体含量的第二臭氧混合回路，辅助臭氧发生器11通过第三射流器设置于第二臭氧混合回路上，第三射流器设置于辅助臭氧发生器11的进口前端。
4、反应混合罐
反应混合罐6为本申请中实现臭氧水暂存、臭氧气体进一步充分溶解的容器装置。为了降低臭氧水中臭氧气体的溢出率，本申请将反应混合罐6设计为高压罐，臭氧水在高气压作用下，臭氧气体的溢出率能够得到降低。
具体地，在本申请中，反应混合罐6的具体结构如下：反应混合罐6包括有反应罐体，反应罐体优先采用不锈钢罐；于反应罐体内设置有混合片15，混合片15为金属片，混合片15于反应罐体内倾斜设置，于混合片15上开设有混合微孔，混合微孔的孔径范围在1-3mm；混合片15于反应罐体内将其内部空间分为循环回流空间以及循环输出空间，循环回流空间与气液多相流泵的出口连接，循环输出空间与气液多相流泵的进口连接；于反应罐体的顶部开设有反应罐体进水口，第一射流器的出水口与反应罐体进水口连接；于反应罐体内、并位于混合片15的上侧设置有布水板16。
混合反应罐内部设置有不锈钢材质的布水板16和多组不锈钢强力混合薄片(混合片15)。布水板16的作用主要是使进入混合反应罐的水均匀的分散流动到整个罐体，不造成水流短流。不锈钢强力混合薄片表面分布无数直径为1-2mm的微孔，其作用是增大水和臭氧气体的接触面积，进一步提升循环水体的水质，保证罐内臭氧水里的臭氧含量始终处于饱和溶解状态。
5、臭氧水回收系统
臭氧水回收系统12用于对参与海砂净化后的臭氧水进行回收，实现其二次利用，以降低水资源的浪费。
在本申请中，臭氧水回收系统12包括有沉淀池、与沉淀池工艺衔接的脱氯曝气池、与脱氯曝气池工艺衔接的生物净化池、与生物净化池工 艺衔接的清水沉淀回用池。
沉淀池通过臭氧水回收管路与中间回转轮2、净化滚筒4以及后置回转轮3连接，清水沉淀回用池与清水补水罐7连接。
6、水质过滤罐
水质过滤罐13的主要作用是实现对回收的臭氧水进行高效过滤。
具体地，于清水沉淀回用池与清水补水罐7之间设置有用于对回收的臭氧水进行再次过滤的水质过滤罐13。水质过滤罐13包括有过滤罐体，于过滤罐体内设置有罐内过滤装置14，罐内过滤装置14在过滤罐体内将其内部空间分为过滤前腔室以及过滤后腔室；
清水沉淀回用池与过滤前腔室连接，过滤后腔室与清水补水罐7连接。
罐内过滤装置14的结构为：包括有过滤布袋，在过滤布袋内、自下而上填装有石英砂形成有石英砂过滤层以及活性炭形成有活性炭过滤层。需要过滤的液体从水质过滤罐13下层进入，经过罐内过滤装置14后得到净化，然后由水质过滤罐13上层输出。
水质过滤罐13的内部设置了罐内过滤装置14，罐内过滤装置14具有过滤布袋，在过滤布袋内分别装有用于过滤细小颗粒的石英砂滤层和用于吸附溶解在水里的有机物和氯离子的具有高吸附力的活性炭滤层。含有杂质和有机物的废水从水质过滤罐13下部进水口进入罐体，然后均匀穿过进水布水板16，进入石英砂滤层，在石英砂滤层过滤掉细小颗粒物的废水，进入到具有高吸附力的活性炭滤层，通过活性炭内部无数孔隙形成的超强的比表面积，把废水里的有机物和氯化物吸附在孔隙里，使废水得到净化。净化后的水均匀穿过出水布水板16，从水质过滤罐13的上部出水口出水。采用下进水，上出水的过滤方式，不易造成滤层阻塞，延长了过滤周期。而传统的过滤方式基本都是上进水，下出水，容易造成悬浮物堆积在滤层的上部，需频繁的进行反冲洗。即耗时又费水。过滤布袋撑开后为漏斗形结构，过滤布袋撑开后其锥角在45°左右，这种成45°堆起来的过滤层结构方式，使更换滤料相比传统的过滤层结构 方式变成非常轻松。
本申请中，臭氧水浓度对海砂氯离子含量的影响：在水温22℃条件下，采用去离子水，当通入臭氧气体经高效混合装置混合4min后，臭氧水浓度达到饱和，饱和浓度为40.5mg/L，随着臭氧水浓度的提高，处理后海砂氯离子含量不断降低，当采用水温22℃条件下，浓度为40.5mg/L时的臭氧水处理时，海砂氯离子含量≤0.0018％。由于臭氧水的浓度越高，海砂中氯离子与臭氧发生氧化还原反应就越充分，因此在海砂净化处理过程中应持续通入臭氧，使臭氧水保持在饱和高浓度状态，提高净化效果。
海砂中游离的氯离子与臭氧分子(O 3)接触时，就会分解臭氧分子而生成氧气(O 2)和次氯酸根离子(ClO -)或氯气(Cl 2)，其反应方程式如下：
公式(7)Cl -+O 3→O 2+ClO -或公式(8)Cl -+O 3→O 2+Cl 2。
以上反应的电极反应式如下：
正极：公式(9)O 3+2H+2e→O 3+H 2O，EΘ＝+2.01V；
负极：公式(10)Cl -+2OH --2e→ClO -+H 2O，EΘ＝-0.89V；
公式(11)2Cl --2e→Cl 2，EΘ＝1.36V；
公式(9)+公式(10)得到：公式(12)Cl -+O 3→O 2+ClO -，E＝+1.18V；
公式(10)+公式(11)得到：公式(13)O 3+2Cl -+2H +→O 2+Cl 2+H 2O，E＝+0.71V。
由反应式(12)和(13)反应势E均大于0，所以这两个反应均能自发产生。因此，在海砂净化过程中，采用高效的方法使Cl 2挥发走，有利于反应(11)的发生，从而能有效把海砂中的氯离子除掉，提高海砂净化效果。
综上所述：
1、当采用水温22℃条件下，臭氧通入4min后可达到最大浓度为40.5mg/L，且随着臭氧水浓度的提高，处理后海砂氯离子含量不断降低。
2、臭氧水浓度随时间变化衰减，臭氧水在高浓度状态更容易分解，在最初30分钟内迅速下降至原始浓度的50％左右，此后降解速度变缓。
3、采用海砂净化新工艺对海砂进行淡化处理后，能有效降低海砂的氯离子含量，海砂淡化的最佳处理工艺为：臭氧水浓度为40.5mg/L，在洗砂过程中分3个点投加，经净化处理后海砂的氯离子含量可≤0.0018％。
根据GB/T14684-2011《建设用砂标准》标准，合格的建筑用砂的氯离子含量应控制在≤0.06％。因此，净化处理后海砂的性能达到了建筑用砂标准。
这样不仅能够实现传统的海砂水洗，同时还能够利用臭氧，对海砂中的氯离子进行高效去除。传统的海砂净化工艺需要使用大量的淡水经过多次冲洗，而且氯离子含量较高，淡化效果较差。本申请提出的海砂净化处理新工艺大大减少了淡水的用量，同时能有效降低氯离子含量，提高淡化效果。
虽然，上文中已经用一般性说明及具体实施例对本申请作了详尽的描述，但在本申请基础上，可以对之作一些修改或改进，这对本领域技术人员而言是显而易见的。因此，在不偏离本申请精神的基础上所做的这些修改或改进，均属于本申请要求保护的范围。

Claims (10)

  1. 一种海砂净化系统，其特征在于，包括：
    用于对海砂进行回转搅拌清洗的回转轮；
    用于对回转轮提供清洗用水的供水组件；
    用于对回转轮提供氧化清洗用臭氧水的臭氧水供给组件；
    所述供水组件通过供水管路与所述回转轮连接，所述臭氧水供给组件通过臭氧水输送管路与所述回转轮连接。
  2. 根据权利要求1所述的海砂净化系统，其特征在于，
    所述回转轮包括有前置回转轮(1)、中间回转轮(2)以及后置回转轮(3)，所述中间回转轮与所述后置回转轮之间设置有净化滚筒(4)，所述前置回转轮与所述中间回转轮工艺衔接，所述中间回转轮通过所述净化滚筒与所述后置回转轮工艺衔接；
    所述供水组件通过供水管路与所述前置回转轮连接、用于对所述前置回转轮提供清洗用水，所述臭氧水供给组件通过臭氧水输送管路与所述中间回转轮、所述净化滚筒以及所述后置回转轮连接、用于对所述中间回转轮、所述净化滚筒以及所述后置回转轮提供氧化清洗用臭氧水。
  3. 根据权利要求2所述的海砂净化系统，其特征在于，
    所述供水组件包括有电解装置(5)以及蓄水池，所述蓄水池的出水口连接有供水管路，所述前置回转轮的出水口与所述电解装置连接，所述电解装置与所述蓄水池连接；
    所述前置回转轮中清洗后的清洗废水输送至电解装置中进行电解处理，电解处理后的清洗废水输送至所述蓄水池中储存备用；
    由所述前置回转轮、所述电解装置以及所述蓄水池连接形成有第一循环系统。
  4. 根据权利要求2所述的海砂净化系统，其特征在于，
    所述臭氧水供给组件包括有反应混合罐(6)、清水补水罐(7)、主臭氧发生器(8)以及主气液混合泵(9)；
    所述主臭氧发生器通过第一射流器与所述清水补水罐连接、用于向所述反应混合罐内输送包含有臭氧气体以及清水的气液混合流体；
    所述主气液混合泵与所述反应混合罐连接并形成有用于所述反应混合罐内流体循环流通并可增加流体内臭氧气体含量的第一臭氧混合回路，所述主臭氧发生器通过第二射流器设置于所述第一臭氧混合回路上，所述第二射流器设置于所述主臭氧发生器的进口前端；
    所述反应混合罐通过所述臭氧水输送管路与所述中间回转轮、所述净化滚筒以及所述后置回转轮连接。
  5. 根据权利要求4所述的海砂净化系统，其特征在于，
    还包括有辅助气液混合泵(10)以及辅助臭氧发生器(11)；
    所述辅助气液混合泵与所述反应混合罐连接并形成有用于所述反应混合罐内流体循环流通并可辅助增加流体内臭氧气体含量的第二臭氧混合回路，所述辅助臭氧发生器通过第三射流器设置于所述第二臭氧混合回路上，所述第三射流器设置于所述辅助臭氧发生器的进口前端。
  6. 根据权利要求4所述的海砂净化系统，其特征在于，
    还包括有臭氧水回收系统(12)；
    所述臭氧水回收系统包括有沉淀池、与所述沉淀池工艺衔接的脱氯曝气池、与所述脱氯曝气池工艺衔接的生物净化池、与所述生物净化池工艺衔接的清水沉淀回用池；
    所述沉淀池通过臭氧水回收管路与所述中间回转轮、所述净化滚筒以及所述后置回转轮连接，所述清水沉淀回用池与所述清水补水罐连接。
  7. 根据权利要求6所述的海砂净化系统，其特征在于，
    于所述清水沉淀回用池与所述清水补水罐之间还设置有用于对回收的臭氧水进行再次过滤的水质过滤罐(13)。
  8. 根据权利要求7所述的海砂净化系统，其特征在于，
    所述水质过滤罐包括有过滤罐体，于所述过滤罐体内设置有罐内过滤装置(14)，所述罐内过滤装置在所述过滤罐体内将其内部空间分为过滤前腔室以及过滤后腔室；
    所述清水沉淀回用池与所述过滤前腔室连接，所述过滤后腔室与所述清水补水罐连接。
  9. 根据权利要求4所述的海砂净化系统，其特征在于，
    所述反应混合罐包括有反应罐体，于所述反应罐体内设置有混合片(15)，所述混合片于所述反应罐体内倾斜设置，于所述混合片上开设有混合微孔；
    所述混合片于所述反应罐体内将其内部空间分为循环回流空间以及循环输出空间，所述循环回流空间与所述气液多相流泵的出口连接，所述循环输出空间与所述气液多相流泵的进口连接。
  10. 根据权利要求9所述的海砂净化系统，其特征在于，
    于所述反应罐体的顶部开设有反应罐体进水口，所述第一射流器的出水口与所述反应罐体进水口连接；
    于所述反应罐体内、并位于所述混合片的上侧设置有布水板(16)。
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