WO2021184316A1 - 一种家用高效臭氧纳米气泡水发生系统 - Google Patents

一种家用高效臭氧纳米气泡水发生系统 Download PDF

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Publication number
WO2021184316A1
WO2021184316A1 PCT/CN2020/080270 CN2020080270W WO2021184316A1 WO 2021184316 A1 WO2021184316 A1 WO 2021184316A1 CN 2020080270 W CN2020080270 W CN 2020080270W WO 2021184316 A1 WO2021184316 A1 WO 2021184316A1
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Prior art keywords
water
ozone
generator
nano
gas
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PCT/CN2020/080270
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English (en)
French (fr)
Inventor
桑梓叶
黄锦礼
凌思琪
黄志坚
何嘉仪
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纳米气泡有限公司
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Priority to PCT/CN2020/080270 priority Critical patent/WO2021184316A1/zh
Publication of WO2021184316A1 publication Critical patent/WO2021184316A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/70—Pre-treatment of the materials to be mixed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/50—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle

Definitions

  • the invention relates to the technical field of water preparation equipment, in particular to a strong oxidant preparation equipment for removing pesticide residues in fruits and vegetables and household cleaning and sterilization after ozone is dissolved in water.
  • Ozone has strong oxidizing ability. After being dissolved in water, ozone acts as a strong oxidant, which can decompose organic matter and destroy the structure of biofilm in a short time. At present, the combination of ozone and water as an advanced oxidation process has been widely used in many fields such as drinking water treatment, food cleaning and preservation, sterilization, degradation of pesticide residues, decolorization and deodorization, and sewage treatment.
  • the average diameter of nanobubbles is less than 500nm, and it rises slowly in water and can exist stably for a long time. At the same time, it has a large specific surface area, which increases the gas-liquid two-phase contact area and mass transfer rate, and helps to improve the solubility of gas in water. And remain stable for a long time. Therefore, the nano-bubble generator is used to fully mix the incoming ozone gas with water in the form of nano-bubbles to increase the mass transfer rate between ozone and water, so that it can quickly dissolve in water while significantly improving solubility, and for a longer time Maintain a stable concentration. As a result, the utilization rate of ozone gas can be greatly improved, and the gas supply can be reduced while maintaining a high and stable dissolved concentration and oxidizing capacity.
  • the main purpose of the present invention is to solve the existing technical problems of mixing ozone and water with low solubility, inefficient use of ozone, and insufficient stability of the strong oxidant produced, and proposes a household high-efficiency ozone nanobubble Water generation system.
  • a household high-efficiency ozone nano-bubble water generation system characterized in that the system comprises: a water-making storage tank, a nano-bubble generator, and an air source type ozone generator;
  • the water-making storage tank is provided with a water tank inlet Water outlet, water tank outlet, circulating water outlet and circulating water inlet;
  • the nano bubble generator includes a circulating pipeline connected with the circulating water outlet and the circulating water inlet;
  • the circulating pipeline is connected in series for driving the water storage After the water in the water tank is discharged through the circulating water outlet, it enters through the circulating water inlet to carry out an external circulating water pump for circulating flow;
  • at least one generator pump head is connected in series to the circulating pipeline, and the generator pump head is equipped with gas
  • the pump head of the generator is provided with an ozone gas interface corresponding to the gas stone;
  • the gas outlet of the air source type ozone generator is connected with the ozone gas interface.
  • the water tank inlet of the water storage tank is connected to the external water inlet via a continuous water flow cooling device;
  • the continuous water flow cooling device includes a cooling channel through which the water flow passes, and a heat dissipation device is provided outside the cooling channel.
  • the heat dissipation device includes a semiconductor refrigeration fin, a heat dissipation fin arranged on the semiconductor refrigeration fin, and a cooling fan arranged on the heat dissipation fin.
  • the external water inlet is connected to the tap water filter.
  • An ozone tail gas processor is connected to the water-making storage tank above the water surface through an exhaust gas pipeline; the ozone tail gas processor includes a heater for passing ozone tail gas, a temperature controller, a thermal insulation sleeve, and a heat sink. fan.
  • the air stone is a microporous air stone with a pore diameter of 10-100 ⁇ m.
  • the circulating water outlet and the circulating water inlet are respectively arranged at the bottom of the water production storage tank, and the inlet end and the outlet end of the external circulating water pump are respectively provided with a generator pump head.
  • a waterproof check valve is arranged between the ozone gas interface and the air source type ozone generator.
  • An ozone gas restrictor is provided between the ozone gas interface and the air source type ozone generator, and the ozone gas flow meter controls the flow rate of the ozone gas flowing into the nanobubble generator to be 50-500 mL/min;
  • the water filtering material in the tap water filter is potassium acrylate ion exchange resin, hydrogen acrylate ion exchange resin or double phosphate.
  • the beneficial effects of the present invention are: in the process of circulating the water in the water storage tank through the external circulating water pump of the nano bubble generator, the ozone gas generated by the air source type ozone generator is passed through the 10-100 ⁇ m aperture.
  • the microporous gas stone forms nano bubbles with an average diameter of less than 500 nm in the water in the nano bubble generator, so that the dissolved ozone concentration in the water storage tank can reach up to 1-2 mg/L, which can effectively increase the ozone gas
  • the mixing efficiency with water is beneficial to be used as a household cleaner and disinfectant to better remove pesticide residues on the surface of fruits and vegetables and clean and sterilize household surfaces.
  • the present invention can also be combined with a tap water filter and a water flow cooling device, which can effectively remove chlorine, reduce the concentration of residual chlorine in the tap water to less than 0.02 mg/L, adjust the pH value to less than 7.0, reduce the water temperature, and further increase
  • the solubility of ozone in water reduces the amount of ozone supplied, improves the utilization rate of ozone, and promotes the dissolution and stability of ozone in water.
  • Figure 1 is a schematic diagram of the structure of the present invention
  • Figure 2 is a schematic diagram of the internal structure of the nano bubble generator
  • Figure 3 shows the bubble concentration and particle size distribution curve produced by the nano bubble generator
  • Figure 4 is the change curve of the concentration of dissolved ozone in ozone nanobubble water and its redox potential.
  • a household high-efficiency ozone nano-bubble water generation system of the present invention mainly includes three parts: a water storage tank 3, a nano-bubble generator 4, and an air source ozone generator 5.
  • the capacity of the water storage tank 3 is not less than 4 L.
  • the water storage tank 3 is equipped with four water level sensors from top to bottom, followed by the highest safety warning water level cut off and stop water filling sensor 3-4, water level upper limit stop water filling sensor 3-3, and water filling sensor 3-2. And the lower limit of the water level stop drain sensor 3-1.
  • the four water level sensors are used in conjunction to prevent water overflow and water shortage, thus ensuring the safe operation of the system.
  • the overall material used for the water-making storage tank 3 is food-safe grade material, and at the same time it has ozone aging resistance.
  • the water-making storage tank 3 is provided with a water tank inlet, a water tank outlet, a circulating water outlet, and a circulating water inlet.
  • the external tap water can be filtered from the water tank at 1.5-2.5
  • the flow rate of L/min is discharged into the water production storage tank 3 to prepare ozone nanobubble water.
  • the ozone nano-bubble water in the water storage tank 3 can be discharged from the water outlet of the water tank for use by the user.
  • the outlet of the water tank can be connected to the water intake 8-1 via the drainage pump 8; the outlet of the water tank is also directly connected to the waste water disposal outlet 8-2; The flow rate of min is discharged from the water intake 8-1, or the flow rate of higher is discharged quickly from the waste water disposal outlet 8-2.
  • the drainage pump 8 adopts food safety grade material polyphenylene ether, and at the same time has ozone aging resistance.
  • the circulating water outlet and the circulating water inlet are used to connect the nano bubble generator 4.
  • the nano-bubble generator 4 drives the water in the water storage tank 3 to circulate, and during the cycle, the ozone gas generated by the air-sourced ozone generator 5 is mixed with water in the form of nano-bubbles, which can effectively increase ozone.
  • the mixing efficiency of gas and water is the most important factor for the production of gas and water.
  • the nano bubble generator 4 specifically includes a circulating pipeline connected with the circulating water outlet and the circulating water inlet; the circulating pipeline is connected in series to drive the water storage tank 3 The water is discharged through the circulating water outlet and enters through the circulating water inlet, and the external circulating water pump 4-1 for circulating flow; at least one generator pump head 4-2 is connected in series to the circulating pipeline, and the generator pump head 4-2 is connected in series.
  • An air stone 4-3 is provided, and the outside of the generator pump head 4-2 is provided with an ozone gas interface corresponding to the air stone 4-3.
  • the circulating water outlet and the circulating water inlet are respectively provided at the bottom of the water production storage tank 3, and the inlet and outlet ends of the external circulating water pump 4-1 are respectively provided with a generator pump head 4-2.
  • the air stone in the pump head 4-2 of the generator is a microporous air stone with a diameter of 10-100 ⁇ m. After the ozone gas produced by the air source type ozone generator 5 is connected to the generator pump head 4-2 through the ozone gas interface, it is exhausted into the circulating water through the gas stone 4-3, forming an average diameter of less than 500 nm nano bubbles.
  • the external circulating water pump 4-1 controls the circulating water flow rate to 1500-3500 L/hr, and the high-speed circulating water and ozone gas are accelerated and collided with the gas stone 4-3 in the generator pump head 4-2. And dispersion, and finally, stable nano-bubbles are produced in the water.
  • All components in the nano bubble generator are made of food-safe materials, and they are resistant to ozone aging. That is to say, the nano bubble generator 4 is based on the invention patent CN107413219A and the "oxidized bubble generation system in fluid" in the US provisional patent application 62/764,986, and has been improved, eliminating the original venturi inlet and outlet pipes, and adding external Circulating water pump 4-1.
  • the nano-bubble generator 4 is connected to the bottom of the water-making storage tank 3, and the ozone gas introduced is fully circulated and mixed with the water flow in the nano-bubble generator 4 to produce an average diameter of less than 500 nm nano-bubbles, and the generated nano-bubbles are discharged into the water storage tank 3, thereby obtaining high-concentration and stable ozone nano-bubble water, in which the dissolved ozone concentration can reach 1-2 mg/L.
  • the air source type ozone generator 5 does not need to be equipped with an external air supply source, and can collect and filter the ambient air by itself, and produce ozone gas after high-pressure corona, with a concentration of 5-15 g/m 3 .
  • the ozone gas is connected to the ozone gas interface of the nano bubble generator 4 through the gas outlet of the air source type ozone generator 5 to provide the nano bubble generator 4 with ozone gas.
  • the ozone gas is installed between the gas outlet of the air source type ozone generator 5 and the ozone gas interface of the nanobubble generator 4 with an ozone gas restrictor 6, and an ozone gas flowmeter 6 controls the flow of nanobubbles.
  • the ozone gas flow rate of the generator is 50-500 mL/min.
  • a waterproof one-way valve 6-1 is provided between the ozone gas interface and the air source type ozone generator to prevent the reverse flow of water from entering the air source type ozone generator 5, causing short circuit or electric leakage hazard.
  • the present invention uses the tap water filter 2 to filter the tap water from the external water inlet 1 from the domestic tap water pipe and then enter the water production storage tank 3; the tap water filter 2
  • the water filter material is weakly acidic cation exchange resin or double phosphate (silicon-phosphorus crystal), which can reduce the pH value of tap water to less than 7.
  • the weakly acidic cation exchange resin is preferably potassium acrylate type ion exchange resin or acrylic acid hydrogen type ion exchange resin.
  • Tap water is filtered through tap water filter 2.
  • Antibacterial activated carbon can effectively reduce the residual chlorine concentration in tap water to less than 0.02 mg/L, weak acid cation exchange resin or complex phosphate can adjust the pH of tap water to less than 7, This reduces the consumption of dissolved ozone by impurities in the water.
  • the water tank inlet of the water storage tank 3 can be connected to the external water inlet 1 via a continuous water flow cooling device; the continuous water flow cooling device It includes a cooling channel through which the water flow passes, and a heat dissipation device is arranged on the outside of the cooling channel.
  • the heat dissipation device may specifically include a semiconductor refrigeration fin, a heat dissipation fin arranged on the semiconductor refrigeration fin, and a cooling fan arranged on the heat dissipation fin.
  • the tap water flowing through the cooling channel is cooled from room temperature to less than 20 °C under the cooling and heat dissipation of the semiconductor refrigeration fins, and then enters the water storage tank 3 to achieve water flow cooling, thereby helping to increase the ozone in the water The dissolution and stability.
  • the water production storage tank 3 of the present invention is located above the water surface and is connected to an ozone tail gas processor 7 through an exhaust gas pipeline.
  • the ozone tail gas processor 7 may be just a heater for passing ozone tail gas, and the undissolved ozone in the water storage tank 3 is heated and decomposed into harmless oxygen in the heater.
  • a cooling fan can be provided at the outlet of the heater; under the action of the ozone exhaust processor 7 of the present invention, it is ensured that the exhaust ozone concentration does not exceed 0.05 mg/L to meet the environmental requirements. Require.
  • the ozone tail gas processor 7 also includes a temperature controller arranged on the outer wall of the heater.
  • the overall operation and operation of the system are regulated by a set of electronic control devices 9, such as controlling water supply and drainage, starting and stopping ozone generators and nano-bubble generators, controlling system temperature, etc., including power supply, relays, programmable logic controllers, etc. , Leakage protection switch, etc., to ensure the normal operation of the system.
  • electronic control devices 9 such as controlling water supply and drainage, starting and stopping ozone generators and nano-bubble generators, controlling system temperature, etc., including power supply, relays, programmable logic controllers, etc. , Leakage protection switch, etc., to ensure the normal operation of the system.
  • the tap water connected from the domestic tap water pipe enters from the external water inlet 1, flows through the tap water filter 2, and is filtered by the tap water filter 2, effectively reducing the residual chlorine concentration in the tap water to less than 0.02 mg/L, weak acid cation Exchange resin or double phosphate can adjust the pH value of tap water to lower than 7, and then enter the continuous water flow cooling device for cooling.
  • the water temperature is cooled from room temperature to lower than 20 °C, and then enters the water storage tank 3; air source ozone generation
  • the ozone gas generated by the device 5 is introduced into the nano-bubble generator 4, and the nano-bubble generator 4 drives the water in the water storage tank 3 to circulate, and at the same time, the ozone gas is formed into a nanometer with an average diameter of less than 500 nm through the gas stone 4-3.
  • the bubbles and water are mixed and dissolved; the ozone tail gas overflowing from the water storage tank 3 enters the ozone tail gas processor 7 from the top and is discharged after harmless treatment.
  • Figure 3 shows the particle size distribution curve of nanobubbles.
  • the ozone gas concentration in the surrounding environment was 0.02 g/mL during the operation of the system.
  • the concentration of dissolved ozone in water gradually increased from 0.01 ⁇ g/mL to 1.10 ⁇ g/mL; the oxidation-reduction potential quickly reached 941 mV within 3 minutes, and continued to be higher than 950 mV.
  • the ozone nanobubble water produced by the system is used as a disinfectant and sprayed on the surface of the glass sheet for a sterilization experiment.
  • the results showed that the sterilization rate of Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa within 5 minutes was greater than 99.93%; within 10 minutes, the sterilization rate of Enterococcus hirschii was greater than 99.97%.
  • the cleaning effect is compared with that of tap water soaking, and the removal rate of pesticide residues is significantly increased by 25-60%. At the same time, the appearance and taste of fruits and vegetables have not changed significantly.

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  • Chemical Kinetics & Catalysis (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Abstract

一种家用高效臭氧纳米气泡水发生系统，其包括：制水蓄水箱（3）、纳米气泡发生器（4）及空气源式臭氧发生器（5）；纳米气泡发生器（4）包括有循环管路，循环管路上串接有外置循环水泵（4-1）和发生器泵头（4-2），发生器泵头（4-2）内设有10-100μm孔径的微孔气石（4-3）。

Description

一种家用高效臭氧纳米气泡水发生系统 技术领域
本发明涉及水制备设备技术领域，特别是将臭氧溶于水后用于去除果蔬农残和家居清洁杀菌的强氧化剂制备设备。
 背景技术
臭氧具有强氧化能力，臭氧溶于水后作为一种强氧化剂，能够在短时间内分解有机物、破坏生物膜结构。目前，臭氧与水结合作为高级氧化工艺，已被广泛应用于饮用水处理、食品清洗与保鲜、杀菌消毒、降解农残、脱色除臭、污水处理等众多领域。然而，由于臭氧在水中的传质速率有限以及溶解度较低，直接将臭氧气体通入水中，会大大降低其利用效率，导致臭氧气体消耗量大，水中的有效浓度存续时间短，严重影响氧化能力，同时有大量臭氧尾气扩散到环境中，造成能源浪费与空气污染。
纳米气泡平均直径小于500nm, 在水中上升速度缓慢，可长时间稳定存在；同时具有较大的比表面积，增加了气液两相接触面积与传质速率，有助于提高气体在水中的溶解度，并长时间保持稳定。因此，采用纳米气泡发生器，将通入的臭氧气体以纳米气泡形式与水充分混合，提高臭氧与水之间的传质速率，使其快速溶解在水中的同时显著提高溶解度，并且较长时间保持稳定浓度。由此可极大的提高臭氧气体利用率，减少供气的同时维持较高且稳定的溶解浓度与氧化能力。
除此之外，由于高温、高pH值、以及水中余氯等因素均会导致臭氧在水中的溶解度降低或消耗；这也是现有臭氧技术用于饮用水处理、食品清洗与保鲜、杀菌消毒、降解农残、脱色除臭、污水处理等众多领域存在的问题。
 技术问题
综上所述，本发明的主要目的在于解决现有将臭氧与水混合存在溶解度低，臭氧未得到有效利用，制得的强氧化剂稳定性不足等技术问题，而提出一种家用高效臭氧纳米气泡水发生系统。
 技术解决方案
为解决本发明所提出的技术问题，采用的技术方案为：
一种家用高效臭氧纳米气泡水发生系统，其特征在于所述系统包括：制水蓄水箱、纳米气泡发生器及空气源式臭氧发生器；所述的制水蓄水箱上设有水箱入水口、水箱出水口、循环水出口及循环水入口；所述的纳米气泡发生器包括有与所述循环水出口和循环水入口连接的循环管路；循环管路上串接有用于驱动制水蓄水箱中的水经循环水出口排出后，再经循环水入口进入，进行循环流动的外置循环水泵；循环管路上还至少串接有一个发生器泵头，发生器泵头内设有气石，发生器泵头外部设有与气石对应的臭氧气体接口；所述的空气源式臭氧发生器的气体出口与所述的臭氧气体接口相连。
    作为对本发明作进一步限定的技术方案包括有：
所述的制水蓄水箱的水箱入水口经连续式水流冷却装置连接外部进水口；所述的连续式水流冷却装置包括有供水流通过的冷却通道，在冷却通道的外部设有散热装置。
所述的散热装置包括有半导体制冷片，设于半导体制冷片上的散热片，以及设于散热片上的冷却风扇。
外部进水口与自来水滤水器相连。
所述的制水蓄水箱上位于水面上方通过废气管道连接有臭氧尾气处理器；所述的臭氧尾气处理器包括有供臭氧尾气通过的加热器，控温器，隔热套管，以及散热风扇。
所述的气石为10-100 µm孔径的微孔气石。
所述的循环水出口和循环水入口分别设于制水蓄水箱底部，外置循环水泵的入口端和出口端分别各设一个发生器泵头。
所述的臭氧气体接口与空气源式臭氧发生器之间设有防水单向阀。
所述的臭氧气体接口与空气源式臭氧发生器之间设有臭氧气体限流计，臭氧气体流量计控制通入纳米气泡发生器的臭氧气体流速为50-500 mL/min；
所述的自来水滤水器中滤水材料为丙烯酸钾型离子交换树脂、丙烯酸氢型离子交换树脂或复磷酸盐。
 有益效果
本发明的有益效果为：本发明通过纳米气泡发生器的外置循环水泵对制水蓄水箱中的水进行循环过程中，将空气源式臭氧发生器产生的臭氧气体通过10-100 µm孔径的微孔气石，在纳米气泡发生器内的水中形成平均直径小于500 nm的纳米气泡，从而使制水蓄水箱水中溶解臭氧浓度最高可达1-2 mg/L，可有效提高臭氧气体与水的混合效率，有利于作为家用清洁剂、消毒剂更好地去除果蔬表面农残和家居表面清洁杀菌。另外，本发明还可以同时结合自来水滤水器和水流冷却装置，可有效除氯，可降低自来水中余氯浓度至低于0.02 mg/L，调节pH值至低于7.0，降低水温，进一步增加臭氧在水中的溶解度，从而降低臭氧供气量，提高臭氧利用率，促进臭氧在水中的溶解与稳定。
 附图说明
图1为本发明的结构示意图；
图2为纳米气泡发生器内部结构示意图；
图3为纳米气泡发生器产生的气泡浓度与粒径分布曲线；
图4为臭氧纳米气泡水中溶解臭氧的浓度及其氧化还原电位的变化曲线。
 本发明的最佳实施方式
以下结合附图和本发明优选的具体实施例对本发明的结构作进一步地说明。
参照图1中所示，本发明一种家用高效臭氧纳米气泡水发生系统，主要包括有：制水蓄水箱3、纳米气泡发生器4及空气源式臭氧发生器5三大部分。
制水蓄水箱3容量不小于4 L。制水蓄水箱3内部由上至下装有四个水位传感器，依次是最高安全警示水位断电并停止注水传感器3-4、水位上限停止注水传感器3-3、再次注水传感器3-2、以及水位下限停止排水传感器3-1。四个水位传感器配合使用，可防止注水溢出和缺水空转，从而确保系统安全运行。制水蓄水箱3整体所用材料为食品安全级材料，同时具有耐臭氧老化性能。
所述的制水蓄水箱3上设有水箱入水口、水箱出水口、循环水出口及循环水入口。外部接入的自来水经滤水器过滤后可以从水箱入水口以1.5-2.5 L/min的流速排入制水蓄水箱3，用来制备臭氧纳米气泡水。制水蓄水箱3内的臭氧纳米气泡水可以由水箱出水口排出，以供用户使用。
在具体实施过程中，可以根据需要，在水箱出水口经排水泵8连接有取水口8-1；水箱出水口还直接连接有废水弃置出口8-2；通过排水泵8以1.2-2 L/min的流速从取水口8-1排出，或更高的流速从废水弃置出口8-2快速排出。排水泵8采用食品安全级材料聚苯醚，同时具有耐臭氧老化性能。循环水出口和循环水入口用于连接纳米气泡发生器4。
纳米气泡发生器4驱动制水蓄水箱3的水进行循环流动，并在循环过程中，将空气源式臭氧发生器5产生的臭氧气体以纳米气泡的形式与水进行混合，可有效提高臭氧气体与水的混合效率。
参照图2中所示，所述的纳米气泡发生器4具体包括有与所述循环水出口和循环水入口连接的循环管路；循环管路上串接有用于驱动制水蓄水箱3中的水经循环水出口排出，经循环水入口进入，进行循环流动的外置循环水泵4-1；循环管路上还至少串接有一个发生器泵头4-2，发生器泵头4-2内设有气石4-3，发生器泵头4-2外部设有与气石4-3对应的臭氧气体接口。本实施例中，循环水出口和循环水入口分别设于制水蓄水箱3底部，外置循环水泵4-1的入口端和出口端分别各设一个发生器泵头4-2。发生器泵头4-2内的气石为10-100 µm孔径的微孔气石。空气源式臭氧发生器5产生的臭氧气体经臭氧气体接口接入发生器泵头4-2内之后，经气石4-3向循环水中排气，形成平均直径小于500 nm的纳米气泡。
优选的方案是：外置循环水泵4-1控制循环水流速为1500-3500 L/hr，以高速循环水流与臭氧气体在发生器泵头4-2内通过气石4-3进行加速、碰撞及弥散，最终，在水里产生稳定的纳米气泡。纳米气泡发生器内各个部件均采用食品安全级材料，同时具有耐臭氧老化性能。也即是纳米气泡发生器4以发明专利CN107413219A和美国临时专利申请62/764,986中的“流体中产生氧化气泡系统”为基础，并加以改进，取消原有的文丘里进出水管，新增外置循环水泵4-1。纳米气泡发生器4与制水蓄水箱3底部连通，通入的臭氧气体在纳米气泡发生器4内与水流进行充分循环混合，产生平均直径小于500 nm的纳米气泡，并将产生的纳米气泡排入制水蓄水箱3内，从而得到浓度高且稳定的臭氧纳米气泡水，其中溶解臭氧浓度最高可达1-2 mg/L。
空气源式臭氧发生器5无需配备外部供气源，可自行将环境空气收集过滤干燥，经高压电晕后产生臭氧气体，产生的臭氧气体浓度为5-15 g/m 3。臭氧气体经空气源式臭氧发生器5的气体出口与纳米气泡发生器4的臭氧气体接口相连，为纳米气泡发生器4提供臭氧气体。
为了高效精准地为纳米气泡发生器4提供臭氧气体，避免过量臭氧气体不能有效与水混合而溢出到空气中，造成能源浪费与空气污染；或臭氧气体供量不足，造成气泡水杀菌消毒、降解农残效果不理想，臭氧气体经空气源式臭氧发生器5的气体出口与纳米气泡发生器4的臭氧气体接口之间设有臭氧气体限流计6，臭氧气体流量计6控制通入纳米气泡发生器的臭氧气体流速为50-500 mL/min。所述的臭氧气体接口与空气源式臭氧发生器之间设有防水单向阀6-1，防止水流反向进入空气源式臭氧发生器5，造成短路或漏电危险。
由于自来水中含有的杂质会消耗溶解的臭氧，本发明对外部进水口1从家用自来水管接入的自来水经自来水滤水器2过滤后再接入制水蓄水箱3内；自来水滤水器2中滤水材料为弱酸性阳离子交换树脂或复磷酸盐(硅磷晶)，可降低自来水pH值至低于7。其中弱酸性阳离子交换树脂优选丙烯酸钾型离子交换树脂或丙烯酸氢型离子交换树脂。自来水流经自来水滤水器2进行过滤，抑菌活性炭可有效降低自来水中的余氯浓度至低于0.02 mg/L，弱酸性阳离子交换树脂或复磷酸盐可调节自来水pH值至低于7，由此减少水中杂质对溶解臭氧的消耗。
由于水温会影响到臭氧在水中的溶解与稳定，本发明根据需要，可以在制水蓄水箱3的水箱入水口经连续式水流冷却装置连接外部进水口1；所述的连续式水流冷却装置包括有供水流通过的冷却通道，在冷却通道的外部设有散热装置。散热装置具体可以包括有半导体制冷片，设于半导体制冷片上的散热片，以及设于散热片上的冷却风扇。流经冷却通道的自来水在半导体制冷片的制冷散热作用下，水温由室温冷却至低于20 ℃，之后再进入制水蓄水箱3，以此实现水流冷却, 从而有助于提高臭氧在水中的溶解与稳定。
为了实现对制水蓄水箱3中溢出的臭氧尾气进行处理，本发明制水蓄水箱3上位于水面上方通过废气管道连接有臭氧尾气处理器7。所述的臭氧尾气处理器7可以只是一个供臭氧尾气通过的加热器，制水蓄水箱3中未溶解完的臭氧在加热器中被加热分解成无害的氧气。为了便于加热器中的尾排排出，可以在加热器的出口还设有散热风扇；在本发明的臭氧尾气处理器7作用下，确保排放的尾气臭氧浓度不超过0.05 mg/L，以满足环境要求。为了实现对加热器加热温度的控制，臭氧尾气处理器7还包括有设于加热器外壁的控温器。
系统的整体运行与操作由一套电子控制装置9进行调控，如控制供水与排水、启动与停止臭氧发生器以及纳米气泡发生器、控制系统温度等，具体包括电源、继电器、可编程逻辑控制器、漏电保护开关等，确保系统正常运行。
参照图1所示，本发明优选实施例的工作流程如下：
从家用自来水管接入的自来水由外部进水口1进入，流经自来水滤水器2，由自来水滤水器2过滤，有效降低自来水中的余氯浓度至低于0.02 mg/L，弱酸性阳离子交换树脂或复磷酸盐可调节自来水pH值至低于7后进入连续式水流冷却装置进行冷却，水温由室温冷却至低于20 ℃，之后再进入制水蓄水箱3；空气源式臭氧发生器5产生的臭氧气体导入纳米气泡发生器4，纳米气泡发生器4驱动制水蓄水箱3的水进行循环流动的同时，将臭氧气体经气石4-3形成平均直径小于500 nm的纳米气泡与水进行混合溶解；制水蓄水箱3中溢出的臭氧尾气从顶部进入臭氧尾气处理器7进行无害化处理后排放。
以下为实验室具体案例验证本发明的有益效果：
实施例1
如图1所示系统，5 L 自来水经过滤、降温至18.1℃后储于制水蓄水箱3中， pH值为6.9。启动空气源式臭氧发生器5，产生臭氧气体浓度为9.48 g/m 3。调节通入纳米气泡发生器4的臭氧气体流速为240 mL/min，同时启动与制水蓄水箱3底部连通的纳米气泡发生器4的外置循环水泵4-1，流速为3000 L/hr，开始制备臭氧纳米气泡水。10分钟后，测得水中纳米气泡浓度为2.49×10 7 个每毫升，气泡平均直径为116.5 nm (标准偏差为18.5 nm)。图3所示为纳米气泡粒径分布曲线。与此同时，在系统工作期间测得周围环境中臭氧气体浓度为0.02 g/mL。
实施例2
如图1所示系统，5 L 自来水经过滤， pH值为6.8。启动空气源式臭氧发生器5，产生臭氧气体浓度为11.75 g/m 3。调节通入纳米气泡发生器4的臭氧气体流速为500 mL/min，同时启动与制水蓄水箱3底部连通的纳米气泡发生器4的外置循环水泵4-1，流速为2220 L/hr，开始制备臭氧纳米气泡水。15分钟内，纳米气泡水中溶解臭氧浓度及其氧化还原电位变化曲线如图4所示。其中，水中溶解臭氧浓度由0.01 µg/mL逐渐上升至1.10 µg/mL；氧化还原电位在3分钟内迅速达到941 mV ，并持续高于950 mV。以系统所产生的臭氧纳米气泡水作为消毒杀菌剂，喷涂于玻璃片表面进行杀菌实验。结果显示，5分钟内对大肠杆菌、金黄色葡萄球菌、以及绿脓杆菌的杀菌率大于99.93%；10分钟内，对海氏肠球菌的杀菌率大于99.97%。
实施例3
如图1所示系统，4 L 自来水经过滤后储于制水蓄水箱3中， pH值为6.9。启动空气源式臭氧发生器5，产生臭氧气体浓度为13.88 g/m 3。调节通入纳米气泡发生器4的臭氧气体流速为450 mL/min，同时启动与水箱底部连通的外置循环水泵4-1，流速为3000 L/hr，开始制备臭氧纳米气泡水。10分钟后，水中溶解臭氧浓度为1.37 µg/mL。用系统所产生的臭氧纳米气泡水浸泡清洗果蔬(菜心、辣椒、白菜、四季豆等)表面农残，洗涤效果与用自来水浸泡相比，其农残去除率显著提升25-60%。与此同时，果蔬外观与口感未未有明显改变。

Claims (10)

  1. 一种家用高效臭氧纳米气泡水发生系统，其特征在于所述系统包括：制水蓄水箱、纳米气泡发生器及空气源式臭氧发生器；
    所述的制水蓄水箱上设有水箱入水口、水箱出水口、循环水出口及循环水入口；
    所述的纳米气泡发生器包括有与所述循环水出口和循环水入口连接的循环管路；循环管路上串接有用于驱动制水蓄水箱中的水经循环水出口排出后，再经循环水入口进入，进行循环流动的外置循环水泵；循环管路上还至少串接有一个发生器泵头，发生器泵头内设有气石，发生器泵头外部设有与气石对应的臭氧气体接口；所述的气石为10-100 µm孔径的微孔气石；
    所述的空气源式臭氧发生器的气体出口与所述的臭氧气体接口相连。
  2. 根据权利要求1所述的一种家用高效臭氧纳米气泡水发生系统，其特征在于：所述的制水蓄水箱的水箱入水口经连续式水流冷却装置连接外部进水口；所述的连续式水流冷却装置包括有供水流通过的冷却通道，在冷却通道的外部设有散热装置。
  3. 根据权利要求2所述的一种家用高效臭氧纳米气泡水发生系统，其特征在于：所述的散热装置包括有半导体制冷片，设于半导体制冷片上的散热片，以及设于散热片上的冷却风扇。
  4. 根据权利要求1所述的一种家用高效臭氧纳米气泡水发生系统，其特征在于：外部进水口与自来水滤水器相连。
  5. 根据权利要求1所述的一种家用高效臭氧纳米气泡水发生系统，其特征在于：所述的制水蓄水箱上位于水面上方通过废气管道连接有臭氧尾气处理器；所述的臭氧尾气处理器包括有供臭氧尾气通过的加热器。
  6. 根据权利要求5所述的一种家用高效臭氧纳米气泡水发生系统，其特征在于：所述的加热器的出口还设有散热风扇，加热器外有隔热套管以及控温器。
  7. 根据权利要求1所述的一种家用高效臭氧纳米气泡水发生系统，其特征在于：所述的循环水出口和循环水入口分别设于制水蓄水箱底部，外置循环水泵的入口端和出口端分别各设一个发生器泵头。
  8. 根据权利要求1所述的一种家用高效臭氧纳米气泡水发生系统，其特征在于：所述的臭氧气体接口与空气源式臭氧发生器之间设有防水单向阀。
  9. 根据权利要求1所述的一种家用高效臭氧纳米气泡水发生系统，其特征在于：所述的臭氧气体接口与空气源式臭氧发生器之间设有臭氧气体限流计，臭氧气体流量计控制通入纳米气泡发生器的臭氧气体流速为50-500 mL/min。
  10. 根据权利要求3所述的一种家用高效臭氧纳米气泡水发生系统，其特征在于：所述的自来水滤水器中滤水材料为丙烯酸钾型离子交换树脂、丙烯酸氢型离子交换树脂或复磷酸盐。
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