CN212188623U - Household efficient ozone nano-bubble water generation system - Google Patents
Household efficient ozone nano-bubble water generation system Download PDFInfo
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- CN212188623U CN212188623U CN202020353372.3U CN202020353372U CN212188623U CN 212188623 U CN212188623 U CN 212188623U CN 202020353372 U CN202020353372 U CN 202020353372U CN 212188623 U CN212188623 U CN 212188623U
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Abstract
A household efficient ozone nano bubble water generating system relates to the field of strong oxidant preparation equipment for removing fruit and vegetable pesticide residues and cleaning and sterilizing home after dissolving ozone in water. The problem of current with ozone and water mixture have the solubility low, ozone not effectively utilized etc. technical problem is solved, include: a water storage tank for producing water, a nano bubble generator and an air source type ozone generator; the nano bubble generator comprises a circulating pipeline, an external circulating water pump and a generator pump head are connected in series on the circulating pipeline, microporous air stones with the aperture of 10-100 mu m are arranged in the generator pump head, and nano bubbles with the average diameter smaller than 500nm are formed in water in the nano bubble generator in the process that the external circulating water pump circulates the water in the water making water storage tank, so that the concentration of dissolved ozone in the water making water storage tank can be up to 1-2 mg/L; can effectively improve the mixing efficiency of ozone gas and water, and is beneficial to removing pesticide residues on the surfaces of fruits and vegetables and cleaning and sterilizing the surfaces of houses.
Description
Technical Field
The invention relates to the technical field of water preparation equipment, in particular to strong oxidant preparation equipment for removing fruit and vegetable pesticide residues and cleaning and sterilizing home after ozone is dissolved in water.
Background
Ozone has strong oxidizing power, and is dissolved in water to serve as a strong oxidant, so that organic matters can be decomposed in a short time, and a biological membrane structure can be damaged. At present, ozone and water are combined to be an advanced oxidation process, and the advanced oxidation process is widely applied to a plurality of fields of drinking water treatment, food cleaning and fresh keeping, sterilization and disinfection, pesticide residue degradation, decoloration and deodorization, sewage treatment and the like. However, because of the limited mass transfer rate and low solubility of ozone in water, the direct introduction of ozone gas into water can greatly reduce the utilization efficiency of ozone gas, resulting in high ozone gas consumption, short effective concentration in water, seriously affecting the oxidation capacity, and simultaneously, a large amount of ozone tail gas is diffused into the environment, resulting in energy waste and air pollution.
The average diameter of the nano bubbles is less than 500nm, the nano bubbles rise slowly in water and can stably exist for a long time; meanwhile, the catalyst has a large specific surface area, increases the gas-liquid two-phase contact area and the mass transfer rate, is beneficial to improving the solubility of gas in water, and keeps stable for a long time. Therefore, the nano bubble generator is adopted to fully mix the introduced ozone gas with water in a nano bubble form, so that the mass transfer rate between the ozone and the water is improved, the solubility of the ozone and the water is remarkably improved while the ozone and the water are quickly dissolved in the water, and the stable concentration is kept for a long time. Therefore, the utilization rate of the ozone gas can be greatly improved, the gas supply is reduced, and meanwhile, higher and stable dissolving concentration and oxidation capacity are maintained.
In addition, the high temperature, high pH value, residual chlorine in water and other factors can reduce or consume the solubility of ozone in water; the ozone technology is also a problem in many fields such as drinking water treatment, food cleaning and fresh keeping, sterilization, pesticide residue degradation, decoloration and deodorization, sewage treatment and the like.
Disclosure of Invention
In summary, the invention provides a household efficient ozone nano bubble water generating system, which aims to solve the technical problems that the existing mixing of ozone and water has low solubility, the ozone is not effectively utilized, the stability of the prepared strong oxidant is insufficient, and the like.
In order to solve the technical problems provided by the invention, the technical scheme is as follows:
a household high efficiency ozone nano bubble water generating system, characterized in that the system comprises: a water storage tank for producing water, a nano bubble generator and an air source type ozone generator; the water-making water storage tank is provided with a water tank water inlet, a water tank water outlet, a circulating water outlet and a circulating water inlet; the nano bubble generator comprises a circulating pipeline connected with the circulating water outlet and the circulating water inlet; the circulating pipeline is connected in series with an external circulating water pump which is used for driving water in the water making water storage tank to flow circularly after being discharged through a circulating water outlet and then entering through a circulating water inlet; the circulating pipeline is also at least connected with a generator pump head in series, the generator pump head is internally provided with a gas stone, and the outside of the generator pump head is provided with an ozone gas interface corresponding to the gas stone; and a gas outlet of the air source type ozone generator is connected with the ozone gas interface.
The technical scheme for further limiting the invention comprises the following steps:
the water tank water inlet of the water making water storage tank is connected with an external water inlet through a continuous water flow cooling device; the continuous water flow cooling device comprises a cooling channel for water flow to pass through, and a heat dissipation device is arranged outside the cooling channel.
The heat dissipation device comprises a semiconductor refrigeration piece, a heat dissipation piece arranged on the semiconductor refrigeration piece and a cooling fan arranged on the heat dissipation piece.
The external water inlet is connected with a tap water filter.
The water-making water storage tank is positioned above the water surface and is connected with an ozone tail gas processor through a waste gas pipeline; the ozone tail gas treater comprises a heater for ozone tail gas to pass through, a temperature controller, a heat insulation sleeve and a cooling fan.
The air stone is microporous air stone with the aperture of 10-100 mu m.
The circulating water outlet and the circulating water inlet are respectively arranged at the bottom of the water making water 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 flow limiting meter is arranged between the ozone gas interface and the air source type ozone generator, and the ozone gas flow limiting meter controls the flow rate of the ozone gas introduced into the nano bubble 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 polyphosphate.
The invention has the beneficial effects that: in the process of circulating water in the water making water storage tank through the external circulating water pump of the nano-bubble generator, ozone gas generated by the air source type ozone generator passes through microporous air stones with the aperture of 10-100 mu m to form nano-bubbles with the average diameter smaller than 500nm in the water in the nano-bubble generator, so that the concentration of dissolved ozone in the water making water storage tank can reach 1-2 mg/L to the maximum, the mixing efficiency of the ozone gas and the water can be effectively improved, and the ozone generator is favorable for being used as a household cleaning agent and a disinfectant to better remove pesticide residues on the surfaces of fruits and vegetables and clean and sterilize the surfaces of households. In addition, the invention can also combine the running water filter and the water flow cooling device at the same time, can effectively remove chlorine, can reduce the concentration of residual chlorine in the running water to be lower than 0.02 mg/L, adjust the pH value to be lower than 7.0, reduce the water temperature, further increase the solubility of ozone in water, thereby reducing the air supply quantity of ozone, improving the utilization rate of ozone, and promoting the dissolution and the stability of ozone in water.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the inner structure of the nanobubble generator;
FIG. 3 is a graph showing the concentration and particle size distribution of bubbles generated by the nanobubble generator;
FIG. 4 is a graph showing the concentration of dissolved ozone in ozone nanobubble water and the change in oxidation-reduction potential thereof.
Detailed Description
The structure of the present invention will be further described with reference to the accompanying drawings and preferred embodiments of the present invention.
Referring to fig. 1, the invention relates to a household high-efficiency ozone nano bubble water generating system, which mainly comprises: a water-making water storage tank 3, a nano-bubble generator 4 and an air source type ozone generator 5.
The capacity of the water making water storage tank 3 is not less than 4L. Four water level sensors are arranged in the water production and storage tank 3 from top to bottom, namely a highest safety warning water level power-off and water injection stopping sensor 3-4, a water level upper limit water injection stopping sensor 3-3, a water re-injection sensor 3-2 and a water level lower limit water drainage stopping sensor 3-1 in sequence. The four water level sensors are matched for use, so that water injection overflow and water shortage idling can be prevented, and the safe operation of the system is ensured. The water making and storing tank 3 is made of food safety material and has ozone aging resistance.
The water making and storing tank 3 is provided with a water tank inlet, a water tank outlet, a circulating water outlet and a circulating water inlet. The tap water accessed from the outside can be discharged into the water storage tank 3 from the water inlet of the water tank at the flow rate of 1.5-2.5L/min after being filtered by the water filter, so as to prepare the ozone nano bubble water. The ozone nano bubble water in the water producing and storing tank 3 can be discharged from the water outlet of the water tank for users to use.
In the specific implementation process, a water outlet of the water tank is connected with a water intake 8-1 through a drainage pump 8 according to the requirement; the water outlet of the water tank is also directly connected with a waste water disposal outlet 8-2; is discharged from the water intake port 8-1 at a flow rate of 1.2-2L/min by the drain pump 8, or is rapidly discharged from the waste water disposal outlet port 8-2 at a higher flow rate. The drain pump 8 is made of food safety grade material polyphenyl ether and has ozone aging resistance. The circulating water outlet and the circulating water inlet are connected with the nano bubble generator 4.
The nano bubble generator 4 drives the water of the water making water storage tank 3 to circularly flow, and ozone gas generated by the air source type ozone generator 5 is mixed with the water in a nano bubble mode in the circulating process, so that the mixing efficiency of the ozone gas and the water can be effectively improved.
Referring to fig. 2, the nano-bubble generator 4 specifically includes a circulating pipeline connected to the circulating water outlet and the circulating water inlet; an external circulating water pump 4-1 for driving water in the water making water storage tank 3 to be discharged through a circulating water outlet and enter through a circulating water inlet to flow circularly is connected in series on the circulating pipeline; the circulating pipeline is also at least connected with a generator pump head 4-2 in series, a gas stone 4-3 is arranged in the generator pump head 4-2, and an ozone gas interface corresponding to the gas stone 4-3 is arranged outside the generator pump head 4-2. In this embodiment, the circulating water outlet and the circulating water inlet are respectively disposed at the bottom of the water-making water storage tank 3, and the inlet end and the outlet end of the external circulating water pump 4-1 are respectively provided with a generator pump head 4-2. The air stone in the generator pump head 4-2 is microporous air stone with the aperture of 10-100 mu m. Ozone gas generated by an air source type ozone generator 5 is connected into a generator pump head 4-2 through an ozone gas interface, and then is exhausted into circulating water through a gas stone 4-3 to form nano bubbles with the average diameter of less than 500 nm.
The preferred scheme is as follows: the external circulating water pump 4-1 controls the flow rate of circulating water to be 1500-3500L/hr, and the high-speed circulating water flow and ozone gas are accelerated, collided and dispersed in a generator pump head 4-2 through a gas stone 4-3, and finally, stable nano bubbles are generated in water. All parts in the nano bubble generator are made of food safety-grade materials and have ozone aging resistance. Namely, the nano bubble generator 4 is based on the invention patent CN107413219A and the system for generating oxidation bubbles in fluid in the U.S. provisional patent application 62/764,986, and is improved by eliminating the original venturi water inlet and outlet pipe and adding an external circulating water pump 4-1. The nano bubble generator 4 is communicated with the bottom of the water making water storage tank 3, the introduced ozone gas is fully and circularly mixed with water flow in the nano bubble generator 4 to generate nano bubbles with the average diameter less than 500nm, and the generated nano bubbles are discharged into the water making water storage tank 3, so that high-concentration and stable ozone nano bubble water is obtained, wherein the highest concentration of dissolved ozone can reach 1-2 mg/L.
The air source type ozone generator 5 can automatically collect, filter and dry ambient air without an external air supply source, and generate ozone gas after high-voltage corona, wherein the concentration of the generated ozone gas is 5-15 g/m3. The ozone gas is connected with an ozone gas interface of the nano bubble generator 4 through a gas outlet of the air source type ozone generator 5 to provide the ozone gas for the nano bubble generator 4.
In order to efficiently and accurately provide ozone gas for the nano bubble generator 4 and avoid the problem that excessive ozone gas cannot be effectively mixed with water and overflows into the air, so that energy waste and air pollution are caused; or the ozone gas supply is insufficient, so that the effects of sterilizing and disinfecting the bubble water and degrading pesticide residues are not ideal, an ozone gas flow limiting meter 6 is arranged between the ozone gas passing through the gas outlet of the air source type ozone generator 5 and the ozone gas interface of the nano bubble generator 4, and the flow rate of the ozone gas introduced into the nano bubble generator is controlled to be 50-500 mL/min by the ozone gas flow meter 6. A waterproof check valve 6-1 is arranged between the ozone gas interface and the air source type ozone generator to prevent water flow from reversely entering the air source type ozone generator 5 to cause short circuit or electric leakage danger.
As the impurities contained in the tap water can consume the dissolved ozone, the tap water which is accessed from a household tap water pipe to the external water inlet 1 is filtered by the tap water filter 2 and then is accessed into the water making water storage tank 3; the water filtering material in the tap water filter 2 is weakly acidic cation exchange resin or polyphosphate (silicon-phosphorus crystal), and can reduce the pH value of tap water to be lower than 7. Wherein the weak acid cation exchange resin is preferably potassium acrylate ion exchange resin or hydrogen acrylate ion exchange resin. The tap water flows through the tap water filter 2 for filtration, the bacteriostatic active carbon can effectively reduce the concentration of residual chlorine in the tap water to be lower than 0.02 mg/L, and the weakly acidic cation exchange resin or the polyphosphate can adjust the pH value of the tap water to be lower than 7, so that the consumption of impurities in the water to dissolved ozone is reduced.
Because the water temperature can influence the dissolution and the stability of ozone in water, the invention can connect the external water inlet 1 at the water tank water inlet of the water making water tank 3 through the continuous water flow cooling device according to the requirement; the continuous water flow cooling device comprises a cooling channel for water flow to pass through, and a heat dissipation device is arranged outside the cooling channel. The heat dissipation device may specifically include a semiconductor cooling plate, a heat dissipation plate disposed on the semiconductor cooling plate, and a cooling fan disposed on the heat dissipation plate. Under the refrigeration and heat dissipation effects of the semiconductor refrigeration sheet, the temperature of tap water flowing through the cooling channel is cooled to be lower than 20 ℃ from room temperature, and then the tap water enters the water making water storage tank 3, so that water flow cooling is realized, and the dissolution and stability of ozone in water are improved.
In order to treat ozone tail gas overflowing from the water storage tank 3 for water production, an ozone tail gas processor 7 is connected to the water storage tank 3 above the water surface through a waste gas pipeline. The ozone tail gas processor 7 can be only a heater for ozone tail gas to pass through, and ozone which is not dissolved in the water making water storage tank 3 is heated and decomposed into harmless oxygen in the heater. In order to facilitate the tail discharge in the heater, a heat radiation fan can be arranged at the outlet of the heater; under the action of the ozone tail gas processor 7, the concentration of the ozone in the discharged tail gas is ensured not to exceed 0.05 mg/L, so as to meet the environmental requirements. In order to realize the control of the heating temperature of the heater, the ozone tail gas processor 7 also comprises a temperature controller arranged on the outer wall of the heater.
The whole operation and operation of the system are regulated and controlled by a set of electronic control device 9, such as controlling water supply and drainage, starting and stopping the ozone generator and the nano bubble generator, controlling the temperature of the system and the like, and the system specifically comprises a power supply, a relay, a programmable logic controller, an electric leakage protection switch and the like, so that the normal operation of the system is ensured.
Referring to fig. 1, the work flow of the preferred embodiment of the present invention is as follows:
tap water from a household tap water pipe enters from an external water inlet 1, flows through a tap water filter 2, is filtered by the tap water filter 2, effectively reduces the concentration of residual chlorine in the tap water to be lower than 0.02 mg/L, and enters a continuous water flow cooling device for cooling after the pH value of the tap water is regulated to be lower than 7 by using weakly acidic cation exchange resin or polyphosphate, and the water temperature is cooled to be lower than 20 ℃ from room temperature, and then enters a water storage tank 3 for making water; ozone gas generated by an air source type ozone generator 5 is led into a nano bubble generator 4, the nano bubble generator 4 drives water in a water making water storage tank 3 to circularly flow, and simultaneously, the ozone gas is mixed and dissolved with the water by forming nano bubbles with the average diameter less than 500nm through air stones 4-3; ozone tail gas overflowing from the water making water storage tank 3 enters the ozone tail gas processor 7 from the top to be subjected to harmless treatment and then is discharged.
The following laboratory specific cases demonstrate the beneficial effects of the invention:
example 1
As shown in the system of figure 1, 5L of tap water is filtered, cooled to 18.1 ℃ and stored in a water storage tank 3 with the pH value of 6.9. Starting the air source type ozone generator 5 to generate ozone gas with a concentration of 9.48 g/m3. The flow rate of the ozone gas introduced into the nano-bubble generator 4 is adjusted to 240 mL/min, and simultaneously, an external circulating water pump 4-1 of the nano-bubble generator 4 communicated with the bottom of the water production water storage tank 3 is started, the flow rate is 3000L/hr, and the preparation of the ozone nano-bubble water is started. After 10 minutes, the nanobubble concentration in the water was found to be 2.49X 107The average diameter of the bubbles per ml was 116.5 nm (standard deviation 18.5 nm). FIG. 3 shows a nanobubble particle size distribution curve. At the same time, the ozone gas concentration in the ambient environment was measured to be 0.02 g/mL during system operation.
Example 2
In the system shown in FIG. 1, 5L of tap water was filtered and the pH was 6.8. Starting the air source type ozone generator 5 to generate ozone gas with a concentration of 11.75 g/m3. The flow rate of the ozone gas introduced into the nano-bubble generator 4 is adjusted to be 500 mL/min, and simultaneously, an external circulating water pump 4-1 of the nano-bubble generator 4 communicated with the bottom of the water production water storage tank 3 is started, the flow rate is 2220L/hr, and then the preparation of the ozone nano-bubble water is started. The concentration of dissolved ozone in nanobubble water and the curve of the change of the oxidation-reduction potential thereof within 15 minutes are shown in FIG. 4. Wherein the concentration of dissolved ozone in water is gradually increased from 0.01 mug/mL to 1.10 mug/mL;the redox potential reached 941 mV rapidly within 3 minutes and lasted above 950 mV. Ozone nano bubble water generated by the system is used as a disinfectant and is sprayed on the surface of the glass sheet for a sterilization experiment. The result shows that the sterilization rate of the bacillus coli, the staphylococcus aureus and the pseudomonas aeruginosa in 5 minutes is more than 99.93 percent; within 10 minutes, the sterilization rate of the enterococcus hirae is more than 99.97 percent.
Example 3
As shown in the system of figure 1, 4L of tap water is filtered and stored in a water storage tank 3, and the pH value is 6.9. Starting the air source type ozone generator 5 to generate ozone gas with a concentration of 13.88 g/m3. The flow rate of the ozone gas introduced into the nano bubble generator 4 is adjusted to be 450 mL/min, and simultaneously, an external circulating water pump 4-1 communicated with the bottom of the water tank is started, the flow rate is 3000L/hr, and the preparation of the ozone nano bubble water is started. After 10 minutes, the concentration of dissolved ozone in water was 1.37 mug/mL. The ozone nano bubble water generated by the system is used for soaking and cleaning pesticide residues on the surfaces of fruits and vegetables (cabbage heart, hot pepper, Chinese cabbage, kidney bean and the like), and compared with the washing effect of soaking with tap water, the removal rate of the pesticide residues is remarkably improved by 25-60%. Meanwhile, the appearance and the taste of the fruits and vegetables are not obviously changed.
Claims (10)
1. A household high efficiency ozone nano bubble water generating system, characterized in that the system comprises: a water storage tank for producing water, a nano bubble generator and an air source type ozone generator;
the water-making water storage tank is provided with a water tank water inlet, a water tank water outlet, a circulating water outlet and a circulating water inlet;
the nano bubble generator comprises a circulating pipeline connected with the circulating water outlet and the circulating water inlet; the circulating pipeline is connected in series with an external circulating water pump which is used for driving water in the water making water storage tank to flow circularly after being discharged through a circulating water outlet and then entering through a circulating water inlet; the circulating pipeline is also at least connected with a generator pump head in series, the generator pump head is internally provided with a gas stone, and the outside of the generator pump head is provided with an ozone gas interface corresponding to the gas stone; the air stone is microporous air stone with the aperture of 10-100 mu m;
and a gas outlet of the air source type ozone generator is connected with the ozone gas interface.
2. The high-efficiency ozone nano bubble water generating system for household use according to claim 1, wherein: the water tank water inlet of the water making water storage tank is connected with an external water inlet through a continuous water flow cooling device; the continuous water flow cooling device comprises a cooling channel for water flow to pass through, and a heat dissipation device is arranged outside the cooling channel.
3. The high-efficiency ozone nano bubble water generating system for household use according to claim 2, wherein: the heat dissipation device comprises a semiconductor refrigeration piece, a heat dissipation piece arranged on the semiconductor refrigeration piece and a cooling fan arranged on the heat dissipation piece.
4. The high-efficiency ozone nano bubble water generating system for household use according to claim 1, wherein: the external water inlet is connected with a tap water filter.
5. The high-efficiency ozone nano bubble water generating system for household use according to claim 1, wherein: the water-making water storage tank is positioned above the water surface and is connected with an ozone tail gas processor through a waste gas pipeline; the ozone tail gas treater comprises a heater for ozone tail gas to pass through.
6. The high-efficiency ozone nano bubble water generating system for household use according to claim 5, wherein: the outlet of the heater is also provided with a cooling fan, and a heat insulation sleeve and a temperature controller are arranged outside the heater.
7. The high-efficiency ozone nano bubble water generating system for household use according to claim 1, wherein: the circulating water outlet and the circulating water inlet are respectively arranged at the bottom of the water making water storage tank, and the inlet end and the outlet end of the external circulating water pump are respectively provided with a generator pump head.
8. The high-efficiency ozone nano bubble water generating system for household use according to claim 1, wherein: a waterproof check valve is arranged between the ozone gas interface and the air source type ozone generator.
9. The high-efficiency ozone nano bubble water generating system for household use according to claim 1, wherein: an ozone gas flow limiting meter is arranged between the ozone gas interface and the air source type ozone generator, and the flow rate of the ozone gas led into the nano bubble generator is controlled to be 50-500 mL/min by the ozone gas flow limiting meter.
10. The high-efficiency ozone nano-bubble water generating system for home use according to claim 4, wherein: the water filtering material in the tap water filter is potassium acrylate ion exchange resin, hydrogen acrylate ion exchange resin or polyphosphate.
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| CN111330468A (en) * | 2020-03-19 | 2020-06-26 | 纳米气泡有限公司 | Household efficient ozone nano-bubble water generation system |
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