CN100453473C - water purifier - Google Patents

Abstract

A water purifier, which uses ozone gas as a disinfectant, can be used to clean the water in a fish pond/aquarium/fish tank. The purifier includes an outer shell, an impurity collection tube, an inner tube, a support tube and a gas input tube, which is connected to an ozone generator and is used to input ozone gas. Ozone gas is bubbled into the water, and impurities and organic macromolecules in the water are filtered and collected during the circulation process. The part of the support tube located in the impurity collection tube is a funnel-shaped end with a large bottom and a small top to collect impurities more effectively. The support tube is provided with an overflow hole, so that water can overflow from the hole and recirculate into the system, and at the same time, when the air intake rate is very high, water is prevented from entering the collector. All of the above parts are detachable for easy cleaning. The entire system is connected to the fish pond/aquarium/fish tank through the water inlet and outlet holes on the outer shell.

Description

water purifier

technical field

The invention belongs to the technical field of water treatment, and relates to a water purifier for removing impurities in water, more specifically, to a water purifier using low-concentration ozone as a disinfectant. The water is disinfected.

Background technique

In aquariums and Chinese restaurants that serve live seafood, it is often necessary to keep the seafood alive in the tank for a period of time. The water in the fish tank is usually taken from seawater. Taking Hong Kong as an example, due to the serious pollution of seawater in Hong Kong Victoria Bay, the seawater in the fish tank often contains pathogens. On the other hand, during transportation, seafood such as fish, shrimp, and crab often need to live in very limited volume containers, resulting in high density and the gradual accumulation of organic waste produced by excretion, which is conducive to the growth of bacteria , If not removed in time, it will lead to the spread of diseases such as cholera, so it is necessary to remove these organic substances in the process of water treatment. In the past, chemical oxidation methods were usually used, such as chlorine and bromine and other oxidants (Handbook of Ozone Technology and Application. Rice & Netzer, Ann Arbor Science Publishers, ANN Arbor, MI, 386P, 1982; Ozone in Water Treatment Applications and Engineering. Langkaus et al. , Lewis Publishers, Chelsea, MI, 569p 1991; The Use of Ozone and Associated Oxidation Processes in Drinking Water Treatment.Camel & Bermond.Wat.Res.Vol.32.No.11.pp.3208-3222, 1998), but the Methods often have residues.

On the other hand, when the negative charges on the organic macromolecules in water are neutralized, they no longer repel each other and suspend in water, but agglomerate. This agglomeration produces foam. Protein skimmers in the prior art typically achieve protein separation by gas bubbling or agglutination, i.e. the froth generated by agglutination entrains the organic waste moving up to the collector by bubbling, thus separating the unwanted waste . But when bubbling too fast, the water tends to speed up and pool.

U.S. Pat. No. 6,156,209 discloses a protein skimmer that uses a syringe to generate air bubbles. This method produces a lot of air bubbles, and also wastes a lot of energy and electricity. The operation of the machine requires high-pressure spray, which not only brings noise, but also because the salt in the seawater will gradually block the opening of the syringe, so the syringe May break easily.

U.S. Pat. No. 5,562,821 discloses a foam water purifier which generates air bubbles by vortex motion in a reaction tube. This method suffers from the same problem, that is, the motor that generates the eddy current also makes noise when it is in operation. This foam water purifier is also not suitable for seawater purification as the motor and paddles may become clogged by the salt in the seawater and disable the whole device.

U.S.Pat.No. 4,834,872 discloses a kind of flotation reactor (flotation reactor) that is used to process the liquid that contains biological material, comprises foam pipe, is positioned at the collecting pipe of foam pipe one end, is positioned at the inner layer of foam pipe other end Rising tube (inner rising tube). The reactor removes biomass and nitrite from seawater, aerates it with oxygen, and returns it to the original system for recycling.

Therefore, there is an urgent need for a method and equipment that saves energy, is easy to use, and has no residue after use to purify and sterilize seawater.

Contents of the invention

One of the objects of the present invention is to provide a water purifier that can be used to clean seawater in fish ponds/aquariums/fish tanks or containers for storing live seafood in Chinese restaurants.

On the other hand, the present invention also provides a water purifier using ozone as a disinfectant. The purifier utilizes low-concentration ozone to bubble sea water to remove organic substances in the sea water of the container for storing live seafood, such as protein In order to improve the quality of seawater, it can also sterilize the seawater in the container.

The water purifier of the present invention comprises: a shell, an impurity collecting pipe, a support pipe, an inner pipe and a gas input pipe, and is characterized in that:

The shell is tubular, the lower end has a bottom surface, and a water inlet and a water outlet are opened on the side wall;

a support tube having a diameter smaller than that of the housing and located within the housing;

The impurity collection pipe is fixed on the top of the housing and has an annular bottom surface, and the inner edge of the annular bottom surface is in contact with the outer side wall of the support pipe; and

the inner tube has a diameter smaller than that of the support tube and is located inside the support tube; and

The gas outlet of the gas input pipe is located inside the inner pipe. According to a specific embodiment of the present invention, holes are formed on the side wall of the impurity collection pipe for discharging the impurities in the collection pipe. According to a specific embodiment of the present invention, both the water outlet and the water inlet on the casing wall are located at the upper part of the casing and are arranged opposite to each other, preferably the upper end of the inner tube is slightly lower than the water outlet.

According to a preferred embodiment of the present invention, the part of the support tube located in the impurity collection tube is funnel-shaped with a large bottom and a small top.

According to a preferred embodiment of the present invention, an overflow hole is opened on the upper side wall of the support pipe, and the overflow hole is located at the upper part of the top of the inner pipe and at the lower part of the annular bottom surface of the impurity collection pipe, so that water can pass through the overflow hole. through to prevent overflow, so water can be recirculated through the system. More preferably, these overflow holes are all located on the side wall part above the water surface, and are evenly distributed on the pipe wall of the support pipe at the same horizontal position.

According to a preferred embodiment of the invention, the inner tube and the support tube are arranged in a coaxial manner.

According to a specific embodiment of the present invention, the bottom surface of the impurity collecting pipe is connected to the upper half of the supporting pipe by means of screw connection or the like, so that the supporting pipe is fixed in the shell.

According to another specific embodiment of the present invention, the impurity collecting pipe has a top cover; the top cover has an opening for releasing gas; preferably, the top cover is detachable for easy cleaning and replacement.

According to another specific embodiment of the present invention, the impurity collection pipe discharges impurities and waste through openings. Preferably, the opening is located at the lower half of the side wall of the impurity collection pipe.

According to another specific embodiment of the present invention, an air inlet head is fixed on the gas outlet of the gas inlet pipe, and the air inlet pipe is connected with an ozone generator.

Preferably, the water purifier of the present invention is hung on the edge of the aquarium/aquarium/fish tank and above the water surface.

Each part of the water purifier of the present invention, including the impurity collecting pipe, the air inlet pipe, the inner pipe and the supporting pipe, is detachable for easy cleaning and replacement.

A specific embodiment of the water purifier of the present invention is to use ozone gas as a disinfectant to disinfect water, preferably, the concentration of the ozone gas is lower than 0.04ppm.

The water purifier provided by the invention has low cost, is convenient to use, and can be operated only with air, water and electricity. While filtering seawater to separate out impurities, low-concentration ozone is used to sterilize seawater so that it can be recycled. Low-concentration ozone has a remarkable disinfection effect without residue, and is harmless to people and the environment.

The advantages of the present invention can be better understood in conjunction with the description of the following specific embodiments.

Description of drawings

Fig. 1 is the front view of the water purifier of a preferred embodiment of the present invention;

Fig. 2 is the sectional view of the water purifier of a preferred embodiment of the present invention;

Fig. 3 is respectively with the change curve of the bacterial concentration in the water of air and ozone process with time;

Fig. 4 is the water turbidity curve with time of air and ozone treatment respectively;

Figure 5 shows the amount of protein removed by air and ozone treatment, respectively.

Fig. 6 is a model diagram of experiments by pumping air and ozone into two containers A and B respectively.

Detailed ways

The water purifier of the present invention maximizes the efficiency of separation by controlling bubbling. Bubbling is the driving force for separating impurities such as proteins, but too much bubbling will lead to undesired results such as excessive concentration of water. The inner tube in the water purifier of the present invention is about 24 cm long, so the ozone has enough time to dissolve and react with the organic macromolecules in the water.

Experiments were performed under the conditions shown in Table 1.

Table 1

Experimental parameters value room temperature 17 degrees Celsius water temperature 16.5 degrees Celsius Relative humidity 74% gas flow rate 14.4±1L/hour container size 50.5cm×23cm×20.5cm The effective length of the bubble 30cm

In a specific embodiment of the present invention, the ozone generator is connected to the gas inlet head (13) through the gas outlet of the gas input pipe (19), and is located in the inner pipe (10). The inner tube (10) can be secured within the support tube in a conventional manner. The ozone gas that produces is pumped into water bubbling through the air inlet head (13) of diameter 4cm with pump, produces water flow thus, and the flow velocity of ozone is about 14.4L/ hour. Because ozone is conducive to the formation of foam, it will produce violent mixing in water; this mixing will cause the organic macromolecular substances suspended in water to coagulate and settle, and these organic impurities will be entrained into the impurity collection pipe (12). The part where the upper end of the support pipe (11) is located in the impurity collection pipe (12) is a funnel shape with a large bottom and a small top, so when the air bubbles reach the upper end of the support pipe (11), they will accelerate. Preferably, the lower part of the side wall of the impurity collection pipe (12) has a hole (18), so that the impurities entering the impurity collection pipe can be directly discharged to realize continuous operation, so the water purifier of the present invention can save operating time. Moreover, the bottom surface of the impurity collection pipe is connected with the upper half of the support pipe by means of screw connection, etc., so that the support pipe is divided into upper and lower parts, and the cavity surrounded by the shell (15) and the support pipe (11) is isolated into The upper and lower parts minimize the mixing of discharged impurities with water.

On the other hand, when the bubbling velocity/intake velocity is too large, the water level is not easy to control, so four overflow holes (14) (as shown in Figure 1) can be designed on each side of the support pipe (11). The overflow hole (14) is located approximately 1 inch above the top of the inner pipe (10). Because the opening is very small, about 0.5cm in diameter, only water can pass through the hole, and air bubbles cannot overflow from the overflow hole.

According to a preferred embodiment of the present invention, the impurity collection pipe (12) preferably has a top cover (16), and an opening (17) is provided on the top cover (16), so as to prevent the air pressure in the impurity collection pipe (12) from increasing. The water purifier of the present invention also includes a casing (15) surrounding the inner pipe, the support pipe and the air inlet head. Water inlet (20) and water outlet (21) are arranged respectively on shell (15), and they are connected with aquarium/aquarium/fish tank respectively, make the water wherein can enter in the water quality purifier from water inlet (20), After being treated, return to the fish pond/aquarium/fish tank from the water outlet (21).

Set up the experiment according to the model in Figure 6. Put into water purifier of the present invention in container A and B respectively, the air inlet head of water quality purifier in container A is directly connected with air pump by gas input pipe, the air inlet head of water quality purifier in container B passes through ozone generator Connect with air pump. After starting the power supply of the air pump, the air pump feeds air and ozone into container A and container B respectively at the same gas flow rate.

Measure the bacterial concentration (CFU/ml, CFU is the unit used to express the number of bacteria, namely Colony Forming Unit) in the water of container A and B at the time interval of 0, 8 hours, 16 hours and 24 hours respectively, and each time interval is respectively Measure 3 times, take the average value, and obtain the curve of bacterial concentration changing with time, as shown in Figure 3. It can be seen from Figure 3 that after 8 hours of ozone treatment, the bacteria concentration in the water was significantly less than that in the water treated with air. After 24 hours, the number of bacteria in the water treated with ozone decreased by 9 times compared with that before treatment; while the number of bacteria in water treated with air only decreased by 5 times compared with that before treatment.

Measure the turbidity of treated water at 0, 2 hours, 4 hours, 8 hours and 24 hours respectively, measure 3 times at each time interval, and take the average value to obtain the turbidity of water treated with air and ozone over time. Change curve, see Figure 4. As can be seen from the curve in Figure 4, after 8 hours of ozone treatment, the turbidity of water dropped from 20NTU to 10NTU, and the cleanliness of water increased by about 50%; after 24 hours, the turbidity of water dropped from 20NTU to 3NTU, water cleanliness increased by 85%. The turbidity of water treated with air was almost unchanged.

The foam discharged from the impurity discharge hole of the water purifier was collected, then in a 96-well plate, the protein content in the foam was measured according to the Bradford protein Essay, and then analyzed with a plate spectrophotometer. The protein concentration was determined using the reduction of protein according to a standard curve (Bradford, 1976). Figure 5 shows the amount of protein collected at different time intervals. The average amount of protein collected from the ozone-treated water was 1195 μg, while the average amount of protein collected from the air-treated water was 451 μg. Therefore, ozone treatment is 2-3 times more efficient than air treatment in removing protein and foam. The reduction of foam on the water surface can make the water in the container appear clearer. As mentioned above, ozone can promote the formation of foam, which contains more protein and other organic macromolecular waste, and the discharge of foam also indirectly separates the organic waste in water, so the addition of ozone helps to remove the waste caused by water. Cloudy organic waste such as protein.

The ozone concentration used in the present invention is less than 0.04ppm, and undissolved ozone can hardly be detected at the opening of the top cover of the water purifier. Therefore, the ozone used in the present invention will not cause the problem of ozone pollution or damage to health.

The experimental results show that after 24 hours of ozone treatment, the number of bacteria in water can be successfully reduced, and the growth of bacteria in water can be inhibited. On the other hand, the turbidity of water treated with air did not change significantly, but the turbidity of water treated with ozone for 8 hours decreased from 19 NTU to 10 NTU. Therefore, ozone is very effective in reducing water turbidity and controlling the number of bacteria. More foam can be observed in the ozone treated water, so more waste can be separated by the ozone treatment.

Those skilled in the art can make appropriate changes to the water purifier of the present invention after reading the above description without deviating from the purpose of the present invention, which is still within the protection scope of the present invention.

Claims (12)

1, water purifier comprises shell, impurity collection tube, stay pipe, interior pipe and gas inlet pipe, it is characterized in that:

Described shell in a tubular form, the lower end has the bottom surface, offers water-in and water outlet on its sidewall;

The diameter of described stay pipe is less than the diameter of this shell, and is positioned at this shell;

Described impurity collection tube is fixed in the top of this shell, has annular bottom surface, and the inner edge of this annular bottom surface is connected with the outer side wall of stay pipe;

The part that described stay pipe is positioned at the impurity collection tube is the big down little funnel type of;

The diameter of pipe is less than the diameter of this stay pipe in described, and is positioned at the inside of this stay pipe; With

Described gas inlet pipe is the ozone gas input tube, and its air outlet is positioned at the inside of described pipe.

2. according to the water purifier of claim 1, it is characterized in that: perforate on the sidewall of this impurity collection tube.

3, according to the water purifier of claim 1, it is characterized in that: described water-in and described water outlet all are positioned at the top of this shell, and subtend setting mutually.

4. according to the water purifier of claim 1, it is characterized in that the tube wall top of described stay pipe and offer spillway hole in the bottom of impurity collection tube annular bottom surface.

5, according to the water purifier of claim 4, it is characterized in that: described spillway hole is positioned at the above position, top of this pipe.

6, according to the water purifier of claim 4 or 5, it is characterized in that: described spillway hole is a plurality of, and is evenly distributed on the tube wall of stay pipe.

7, according to the water purifier of claim 1, it is characterized in that: be fixed with the air inlet head on the air outlet of described ozone gas input tube.

8, according to the water purifier of claim 1, it is characterized in that: the top of described impurity collection tube has dismountable top cover.

9. water purifier according to Claim 8, it is characterized in that: described top cover has perforate.

10. according to the water purifier of claim 1.It is characterized in that: this stay pipe and the coaxial setting of interior pipe.

11. the water purifier according to claim 1 is characterized in that: this shell and impurity collection tube are to be connected by butt joint, grafting, clamping or the mode that is threaded.

12. the water purifier according to claim 1 is characterized in that: the bottom at impurity collection tube sidewall is provided with the impurity outlet orifice.

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