WO2021218052A1

WO2021218052A1 - Mixer and separated air purification device comprising same

Info

Publication number: WO2021218052A1
Application number: PCT/CN2020/121480
Authority: WO
Inventors: 龙新平; 程怀玉; 许霜杰; 季斌; 唐巾洁
Original assignee: 武汉大学
Priority date: 2020-04-30
Filing date: 2020-10-16
Publication date: 2021-11-04
Also published as: CN111514702A; LU500202B1

Abstract

A mixer (1) and a separated air purification device. The mixer (1) is used for mixing air and a purification liquid to generate a gas-liquid mixture. The air purification device comprises the mixer (1), a purification liquid storage tank (3) and an air suction inlet (5). A purification liquid inlet of the mixer (1) is in fluid communication with a purification liquid outlet (3-6) of the purification liquid storage tank (3) by means of a pump (2), an air inlet of the mixer (1) is in fluid communication with the air suction inlet (5), a diffusion pipe (1-6) of the mixer (1) is in fluid communication with a gas-liquid mixture inlet (3-2) on the purification liquid storage tank (3) by means of a pipeline (7), and a check valve (4) for preventing flow from reversing is arranged on the pipeline (7). The gas-liquid mixture leaving the mixer (1) enters the purification liquid storage tank (3) to complete gas-liquid separation, purified air returns to air from an air outlet (3-5) on a tank body, and the purification liquid re-enters the mixer (1) from the purification liquid outlet (3-6) to achieve cyclic utilization of the purification liquid.

Description

Mixer and separation type air purification device containing the mixer

Technical field

At least one embodiment disclosed in the present invention relates to a mixer and a separate air purification device including the mixer.

Background technique

In recent years, with the rapid progress of my country's economic level, the people's living standards have continued to improve. At the same time, the rapid development of industrialization has also brought serious air pollution problems, affecting people's health. With the modernization of production and lifestyle, more work and recreational and sports activities can be carried out indoors, and people's indoor activity time is gradually increasing. Especially vulnerable groups such as the elderly, young, sick, and disabled have fewer opportunities for outdoor activities, and even more than 93% of the time spent indoors, which makes the problem of indoor air pollution particularly prominent. According to statistics, indoor environmental pollution has caused 35.7% of respiratory diseases, 22% of chronic lung diseases and 15% of bronchitis, bronchitis and lung cancer. The widespread use of air conditioners in modern life not only brings people a comfortable environment, but also makes the circulation of indoor and outdoor air further restricted, and the pollution problem is also more serious. Indoor air pollution has become one of the five environmental factors most harmful to public health.

The main components of indoor environmental pollutants are divided into the following four categories: PM2.5 suspended particulate matter, formaldehyde, nicotine and other volatile organic compounds, microorganisms, viruses, bacteria, and air odors.

In order to cope with the increasingly severe problem of indoor air pollution, indoor air purification technology has gradually attracted people's attention. At present, the commonly used air purification technologies mainly include: light plasma technology, negative ion technology, photocatalyst technology, HEPA high-efficiency filtration technology, electrostatic dust collection technology and active oxygen technology. In these technologies, most of the core components adopt filter screens or similar forms. Although it is easy to replace, there are many problems: (1) The contact between the air and the filter screen is often insufficient, which directly affects the filtering effect; (2) The air purification speed is slow, and the indoor air cannot be purified quickly; (3) The universality is poor, and it can only deal with certain types of air pollutants; (4) Some technologies are noisy.

Summary of the invention

At least one embodiment disclosed in the present invention provides a mixer and a separate air purification device including the mixer. While ensuring energy saving, environmental protection and economy, the indoor air can be purified better.

At least one embodiment disclosed in the present invention provides a mixer, including: a first fluid inlet; a second fluid inlet; a suction chamber; a mixing pipe that mixes two fluids flowing in from the first fluid inlet and the second fluid inlet; And a diffuser that allows the mixed fluid to leave the mixer; the first fluid inlet is in fluid communication with the suction chamber through a nozzle, the second fluid inlet is in fluid communication with the suction chamber, the suction chamber, the mixing pipe In fluid communication with the diffuser tube in sequence, the flow channel area of the suction chamber gradually decreases along the fluid flow direction, the part of the mixing tube close to the suction chamber is a straight tube, and the mixing tube is far away from the The part of the suction chamber is a wavy pipe, and the flow channel area of the diffuser pipe gradually increases along the fluid flow direction.

In some examples, a plurality of curved guide vanes are installed in the suction chamber, and the guide vanes extend from one end to the other end of the suction chamber.

In some examples, the nozzle is a porous nozzle.

In some examples, the nozzle is an orifice nozzle having an inverted cone shape to enhance the diffusion angle of the fluid.

In some examples, the thickness of the deflector in the suction chamber is between 0.05D and 0.1D, and the height is between 0.1D and 0.2D, where D is the diameter of the mixing tube.

In some examples, the length of the straight pipe in the mixing pipe is 3D to 5D, and the length of the wave-shaped pipe is between 12D and 20D, where D is the diameter of the mixing pipe.

In some examples, the diffusion angle β of the diffusion tube is between 8 and 12°.

At least one embodiment disclosed in the present invention provides a separate indoor air purification device, including the mixer, a circulating water pump, a purified liquid storage tank, and an air suction port. The gas-liquid mixture inlet, the air outlet and the purified liquid outlet on the tank, the first fluid inlet of the mixer is in fluid communication with the purified liquid outlet of the purified liquid storage tank through the circulating water pump, the The second fluid inlet of the mixer is in fluid communication with the air suction inlet, and the diffusion tube of the mixer is in fluid communication with the gas-liquid mixture inlet on the purification liquid storage tank through a pipe, and the pipe There is a check valve to prevent flow reversal.

In some examples, the tank body of the purified liquid storage tank has a filter chamber that filters out solid particles in the gas-liquid mixture flowing in through the gas-liquid mixture inlet, and a liquid storage chamber that stores the filtered purified liquid , Wherein the gas-liquid mixture inlet is in fluid communication with the filter chamber, the purified liquid outlet is in fluid communication with the liquid storage chamber, and the air outlet is located above the liquid storage chamber and/or the filter chamber.

In some examples, the air outlet and/or the air suction inlet on the purified liquid storage tank are provided with isolation nets.

Description of the drawings

In order to more clearly illustrate the technical solutions of the disclosed embodiments of the present invention, the accompanying drawings of the embodiments will be briefly introduced below.

Fig. 1 is a schematic cross-sectional structure diagram of a mixer provided by an embodiment of the present disclosure.

2 is a schematic cross-sectional structure diagram of a mixer provided by another embodiment of the present disclosure.

Fig. 3a is a schematic structural diagram of a suction chamber with a rotating baffle provided by an embodiment of the present disclosure.

Fig. 3b is a schematic diagram of a partial structure of the suction chamber shown in Fig. 3a.

Fig. 4a is a front view of a porous nozzle provided by an embodiment of the present disclosure.

4b is a schematic cross-sectional view of a porous nozzle provided by an embodiment of the present disclosure.

Fig. 5a is a front view of an orifice nozzle provided by an embodiment of the present disclosure.

Figure 5b is a schematic cross-sectional view of an orifice nozzle provided by an embodiment of the present disclosure.

Fig. 6 is a schematic diagram of the principle of a separation air purification device provided by an embodiment of the present disclosure.

FIG. 7 is a schematic diagram of the structure of a purification liquid storage tank provided by an embodiment of the present disclosure.

Description of reference signs:

1- Mixer;

2-Circulating water pump;

3- Purification liquid storage tank;

4- check valve;

5-Air suction port;

6-Isolation network;

7-pipe;

1-1-The first fluid inlet;

1-2-The second fluid inlet;

1-3-Nozzle;

1-3a-Porous nozzle;

1-3b-Orifice nozzle;

1-4-Suction chamber;

1-5-mixing tube;

1-6-diffusion tube;

3-1-Cleaning liquid;

3-2-gas-liquid mixture inlet;

3-3-Isolation board;

3-4 filter screen;

3-6 Purified liquid outlet;

3-7-Waste discharge outlet;

3-8- Purification liquid original liquid supply device;

3-9-Water supply port.

Detailed ways

A type of mixer will be described, and the term "mixer" herein refers to a mixer that mixes fluids. Such a mixer can mix air and purified liquid to produce a stream of purified air for environment or climate control. The structure of the mixer is optimized. The inside of the mixer will produce a very strong fluid shear mixing effect. The inhaled air and the purified liquid will be fully mixed and chemically reacted to form a uniform gas-liquid mixture containing a large number of tiny bubbles. The air and the purification The contact mixing of the liquid is very sufficient, which can maximize the air purification effect of the purification liquid.

Fig. 1 is a schematic cross-sectional structure diagram of a mixer provided by an embodiment of the present disclosure; Fig. 2 is a schematic cross-sectional structure diagram of a mixer provided by another embodiment of the present disclosure. As shown in Figures 1 and 2, the mixer includes a first fluid inlet 1-1, a second fluid inlet 1-2, and a suction chamber 1-4, which will flow from the first fluid inlet 1-1 and the second fluid inlet 1-2 The mixing pipe 1-5 for mixing the two fluids, and the diffuser pipe 1-6 for the mixed fluid to leave the mixer. The first fluid inlet 1-1 is in fluid communication with the suction chamber 1-4 through the nozzle 1-3, the nozzle 1-3 extends into the suction chamber 1-4, and the second fluid inlet 1-2 is in fluid communication with the suction chamber 1-4, The suction chamber 1-4, the mixing pipe 1-5 and the diffusion pipe 1-6 are in fluid communication in sequence. The pipe diameter of the suction chamber 1-4 gradually decreases along the fluid flow direction, and the pipe diameter of the diffuser pipe 1-6 gradually decreases along the fluid flow direction. In order to improve the mixing effect of the mixer, the part of the mixing pipe 1-5 close to the suction chamber 1-4 is a straight pipe, and the part of the mixing pipe 1-5 far from the suction chamber 1-4 is a wavy pipe.

When a mixer is used to mix air and purifying liquid to produce a purified air stream, the fluid at the first fluid inlet 1-1 is the purified fluid with higher pressure after being pressurized, and the fluid at the second fluid inlet 1-2 is the lower pressure For the air to be purified, after the purified liquid enters the suction chamber 1-4 through the first fluid inlet 1-1 and nozzles 1-3, the flow channel area is reduced, forming multiple high-speed fluids, which enter the mixing pipe 1-5. Entrainment will form a low pressure zone at the mixing pipe 1-5. Under the effect of the pressure difference between the low pressure and the outside atmospheric pressure, the air to be purified is sucked into the mixer 1 and mixed with the purified liquid in the mixing pipe 1-5 , The gas-liquid mixture leaves the mixer through the diffuser 1-6.

The air and the purification liquid will be fully mixed in the mixing tube 1-5 to form a uniform gas-liquid mixture containing a large number of tiny bubbles, so that the air and the purification liquid can be fully mixed and reacted. Under the action of the purification liquid, a good Air purification effect. And because the mixer has a strong suction capacity for air, it can treat a large amount of contaminated air in a short time. In addition, the use of liquid-based purification fluids to treat air can simultaneously treat multiple types of pollutants, with strong universality and wide application scope.

As shown in Fig. 3a and Fig. 3b, in order to improve the mixing effect of the mixer, a plurality of curved guide vanes are installed in the suction chamber 1-4, and the guide vanes extend from one end to the other end of the suction chamber 1-4.

Referring to Figure 1, Figure 4a and Figure 4b, the nozzles 1-3 can be porous nozzles 1-3a. The porous nozzles 1-3a are arranged with multiple pore structures, which will transform the purification liquid from a single strand to multiple high-speed fluids. The contact area with the air is increased, thereby significantly enhancing its ability to suck air, and is suitable for occasions that require high air purification speed.

Referring to Figure 2, Figure 5a and Figure 5b, nozzles 1-3 can also be orifice nozzles 1-3b, orifice nozzles 1-3b are inverted cones, which can greatly enhance the diffusion angle of the fluid flowing through the component, although Its mixing effect is slightly weaker than the porous nozzle 1-3a, but its flow loss is smaller, which is suitable for occasions where energy saving is more important.

In order to further enhance the air suction capacity and mixing effect of the mixer, and accelerate the air purification speed, the range of the main structural parameters of the mixer is defined. For ease of description, the diameter D of the mixer mixing tube 1-5 is taken as the reference quantity. The main structural parameters of the mixer can be: the inner diameter of the first fluid inlet 1-1 is about 1.2D～1.5D; the inner diameter of the second fluid inlet 1-2 is about 2D～4D; the distance between the nozzle 1-3 and the inlet of the mixing tube 1-5 The distance is about 0.7D～1.5D, the diameter is about 0.3D～0.6D; the thickness of the porous nozzle 1-3a is about 2.5mm～5mm, the number of holes is 4～12, the size of each hole can be different, according to actual needs Adjust; the orifice diameter of the orifice nozzle 1-3b is about 0.15D～0.45D, the thickness is about 2.5mm～5mm, and the angle is 30°～45°; the contraction angle α of the suction chamber 1-4 is 60°～ Between 120°, the thickness of the deflector is 0.05D～0.1D, and the height is about 0.1D～0.2D; the ratio L/D of the length L to the diameter D of the mixing tube 1-5 should be between 15-25, The length of the straight pipe section of the mixing pipe 1-5 is about 3D～5D, and the length of the wavy pipe is between 12D～20D; the diffusion angle β of the diffuser pipe 1-6 is between 8～12°, and the length is between 5D～9D.

Fig. 6 is a schematic diagram of the principle of a separation air purification device provided by an embodiment of the present disclosure. As shown in Fig. 6, the separation type air purification device includes the mixer 1, the circulating water pump 2, the purified liquid storage tank 3 and the air suction port 5 as described above.

Among them, the circulating water pump 2 provides circulating power for the entire purification device, and its internal liquid contact surface has been specially treated (such as the use of PVC material to make the pump body, the pump surface is sprayed with anti-corrosion coating, etc.) to improve its corrosion resistance, and its Working noise is very small. The air suction port 5 is a pipe with a horn-shaped end, which is placed in the environment to be purified and connected to the mixer 1 through the pipe. The main function is to introduce the air to be purified into the mixer 1. In addition, the air suction port 5 can also be provided with an isolation net 6 to prevent some lighter sundries from being sucked into the mixer.

FIG. 7 is a schematic diagram of the structure of a purification liquid storage tank provided by an embodiment of the present disclosure. As shown in Fig. 7, the purified liquid storage tank 3 includes a tank body, and a gas-liquid mixture inlet 3-2, an air outlet 3-5 and a purified liquid outlet 3-6 located on the tank body. The pre-prepared purification liquid 3-1 is installed in the tank, and its main components can be flexibly changed according to the specific conditions of indoor air pollutants to achieve the best purification effect. The opening at the top of the box can be used as an air outlet 3-5.

In addition, a filter chamber and a liquid storage chamber can be provided in the tank body of the purified liquid storage tank 3. The filter chamber is used to filter out solid particles in the gas-liquid mixture leaving the mixer 1, and the filtered purified liquid enters To the reservoir. Therefore, the filter chamber is in fluid communication with the gas-liquid mixture inlet 3-2, and the liquid storage chamber is in fluid communication with the air outlet 3-5 and the purified liquid outlet 3-6. In a possible implementation, the filter chamber and the liquid storage chamber may be enclosed by the inner wall of the box body, the isolation plate 3-3, and the filter mesh 3-4. The isolation board 3-3 is vertically arranged in the box. The filter screen 3-4 is arranged horizontally, one side is connected with the isolation plate 3-3, and the other three sides are connected with the inner wall of the box. The filter 3-4 can be detachable for easy cleaning.

In addition, a waste discharge port 3-7, a purification liquid stock replenishment device 3-8, and a water replenishment port 3-9 can also be provided on the purified liquid storage tank 3. The waste outlet 3-7 is in fluid communication with the filter chamber, and the solid particles and waste liquid filtered by the filter mesh 3-4 can be discharged from the waste outlet 3-7 when the equipment is not working. The purifying liquid stock replenishing device 3-8 can monitor the content of various purification active ingredients in the purified liquid in real time through the existing technology, and timely replenish the purified liquid stock to ensure the quality of the purified liquid 3-1 in the entire purification device. An appropriate amount of water can be added to the purified liquid storage tank 3 through the water supply port 3-9 to compensate for the water consumption during the operation of the entire device.

Continuing to refer to Figure 6, the first fluid inlet 1-1 of the mixer 1 is in fluid communication with the purified fluid outlet 3-6 of the purified fluid storage tank 3 through the circulating water pump 2, and the second fluid inlet 1-2 of the mixer 1 is inhaled with air. Port 5 is in fluid communication, the diffuser tube 1-6 of the mixer 1 is in fluid communication with the gas-liquid mixture inlet 3-2 on the purification liquid storage tank 3, and the pipe 7 between the diffuser tube 1-6 and the gas-liquid mixture inlet 3-2 There is a check valve 4 to prevent flow reversal.

The gas-liquid mixture leaving the mixer 1 enters the filter chamber inside the tank through the gas-liquid mixture inlet 3-2 on the purified liquid storage tank 3, and then passes through the filter screen 3-4. The existing solid filtration, on the other hand, further promotes the contact between the air and the purification liquid, which can improve the purification effect. The gas-liquid mixture completes the gas-liquid separation in the tank, the purified air returns to the air through the air outlet 3-5, and the purified liquid enters the other side of the purified liquid storage tank 3 from the top of the isolation plate 3-3. The liquid storage chamber enters the purification device pipeline from the purification liquid outlet 3-6 again to realize the recycling of the purification liquid.

It is worth noting that the body gas that escapes after mixing carries a large amount of water droplets. If it is directly discharged, the indoor air humidity will increase. In order to dehydrate the gas, a porous structure isolation net can be set at the air outlet 3-5.

It should be noted that a large-scale mixer 1 can be made to speed up the air purification rate, but in this way, violent air and purification liquid mixing will occur inside the mixer 1, resulting in strong noise. In order to avoid indoor noise pollution, the mixing The device 1 is alone outdoors, the remaining parts of the air purification device are indoors, and the parts are connected by pipes. If the mixer 1 is miniaturized, it can also be placed indoors.

The mixer 1 disclosed in the present invention is simple in structure, easy to manufacture, and reliable in operation, and other parts of the air purification device are relatively cheap, so the entire purification device is economical, reliable in operation, and easy to popularize.

The air purification device disclosed in the present invention can simultaneously purify multiple indoor air pollutants. Since the liquid-based purification method is adopted, and the water body itself can treat a variety of pollutant components in the air, by adjusting the composition of the purification liquid reasonably, the formaldehyde, nicotine and other volatile organic compounds in the air can be better absorbed to purify The chemical composition in the liquid also allows it to kill microorganisms, viruses and bacteria in the indoor air. PM2.5 suspended particles can be easily adsorbed by the purification liquid and removed. If necessary, adding an appropriate amount of air cleaning agent can also better remove the air odor.

When the air purification device disclosed in the present invention is used to purify the indoor air with serious pollution, suspended dust, toluene released from furniture, and cooking fumes, the nozzles 1-3 of the mixer 1 can be porous type. Nozzles 1-3a, the purification liquid in the purification liquid storage tank 3 should contain toluene absorbents, oil fume absorbents, such as formaldehyde absorbents such as chlorine dioxide, hydrogen peroxide, and fatty alcohol polyoxyethylene ether, sodium alkylbenzene sulfonate, The concentration of oil fume absorbents such as ethanol is about 1.5% to 5%, and the rest is water. After the entire device was running for 0.5 hours, the indoor air quality was significantly improved, and the content of dust, oil fume, and formaldehyde was well controlled. The indoor noise during the entire operation was very small, and the expected purification effect was achieved.

When the air purification device disclosed in the present invention is used to purify an indoor environment with relatively light pollution, the main pollutant being nicotine produced by smoking, and a certain peculiar smell, the nozzles 1-3 of the mixer 1 can be selected as orifice nozzles 1. -3b, the purification liquid in the purification liquid storage tank 3 uses pure water (nicotine is easily soluble in water), and an appropriate amount of air freshener is added. After running for 2 hours, the nicotine content in the indoor air decreased rapidly, and the indoor noise was very small during the whole operation process, and a good air purification effect was achieved.

Claims

A mixer (1), characterized by comprising: a first fluid inlet (1-1); a second fluid inlet (1-2); a suction chamber (1-4); from the first fluid inlet (1) -1) Mixing pipe (1-5) that mixes the two fluids flowing in with the second fluid inlet (1-2); and the diffuser pipe (1-6) that allows the mixed fluid to leave the mixer; the first fluid inlet (1 -1) The nozzle (1-3) is in fluid communication with the suction chamber (1-4), the second fluid inlet (1-2) is in fluid communication with the suction chamber (1-4), and the suction chamber (1-4) is mixed The pipes (1-5) and the diffuser pipes (1-6) are in fluid communication in sequence, the flow channel area of the suction chamber (1-4) gradually decreases along the fluid flow direction, and the mixing pipe (1-5) is close to the suction chamber ( The part of 1-4) is a straight pipe, the part of the mixing pipe (1-5) far away from the suction chamber (1-4) is a wavy pipe, and the flow channel area of the diffuser (1-6) is along the fluid flow direction Gradually increase.
The mixer according to claim 1, wherein a plurality of curved guide vanes are installed in the suction chamber (1-4), and the guide vanes extend from one end to the other end of the suction chamber (1-4) .
The mixer according to claim 1, wherein the nozzle (1-3) is a porous nozzle (1-3a).
The mixer according to claim 1, wherein the nozzle (1-3) is an orifice nozzle (1-3b) with an inverted cone shape to enhance the diffusion angle of the fluid.
The mixer according to claim 2, wherein the thickness of the deflector in the suction chamber (1-4) is between 0.05D and 0.1D, and the height is between 0.1D and 0.2D, where D is the mixing The diameter of the tube (1-5).
The mixer according to claim 1, characterized in that the length of the straight pipe in the mixing pipe (1-5) is 3D～5D, the length of the wave-shaped pipe is between 12D～20D, where D is the mixing pipe (1-5) diameter.
The mixer according to claim 1, wherein the diffusion angle β of the diffusion tube (1-6) is between 8 and 12°.
A separate indoor air purification device, characterized by comprising the mixer (1) according to any one of claims 1-7, a circulating water pump (2), a purified liquid storage tank (3) and an air suction port (5) ), the purified liquid storage tank (3) includes a tank body and a gas-liquid mixture inlet (3-2), an air outlet (3-5) and a purified liquid outlet (3-6) on the tank body, and a mixer ( 1) The first fluid inlet (1-1) is in fluid communication with the purified liquid outlet (3-6) of the purified liquid storage tank (3) through the circulating water pump (2), and the second fluid inlet (1) of the mixer (1) -2) In fluid communication with the air suction port (5), the diffuser (1-6) of the mixer (1) is connected to the gas-liquid mixture inlet (3-2) on the purified liquid storage tank (3) through the pipe (7) The pipeline (7) is provided with a non-return valve (4) to prevent the flow from reversing.
The separated indoor air purification device according to claim 8, characterized in that the tank body of the purified liquid storage tank (3) is provided with filtering out of the gas-liquid mixture flowing in through the gas-liquid mixture inlet (3-2) A filter chamber for solid particles and a liquid storage chamber for storing filtered purified liquid, wherein the gas-liquid mixture inlet (3-2) is in fluid communication with the filter chamber, and the purified liquid outlet (3-6) is connected to the liquid storage chamber In fluid communication, the air outlet (3-5) is located above the liquid storage chamber and/or the filter chamber.
The separated indoor air purification device according to claim 8, characterized in that the air outlet (3-5) and/or the air suction inlet (5) on the purified liquid storage tank (3) is provided with an isolation net.