CN111718016A - Ultrafine Nanogenerator - Google Patents

Abstract

The invention provides an ultra-fine nano-generating device, comprising: a water inlet nozzle, a gas-liquid mixing chamber, a water outlet and an air inlet; the water inlet nozzle is connected with a water pump, and a spiral is arranged on the inner wall of the gas-liquid mixing chamber a groove, the air inlet is arranged on the gas-liquid mixing chamber and communicates with the spiral groove. The ultra-fine nano-generating device of the invention can rapidly increase the dissolved oxygen level, greatly reduce the power consumption of oxygen supply, reduce the amount of excess sludge and reduce the usage of chemicals, and optimize the water quality of the effluent.

Description

Ultrafine Nanogenerator

technical field

The invention relates to the technical field of wastewater treatment, in particular to an ultrafine nanometer generating device.

Background technique

The pollution emitted by human activities has exceeded the limit of the water's self-purification ability, and the natural dissolved oxygen content of natural waters is usually about 1ppm. The pollution emitted by human activities has exceeded the limit of the self-purification capacity of waters, and the natural dissolved oxygen content of natural waters is usually about 1ppm. Because there is no dissolved oxygen in the water, a large number of aerobic organisms growing in the water die and sink to the bottom of the water. After decaying and metamorphism, they are deposited as bottom sludge, which constitutes an internal pollution source in the water area. In addition, other pollutants such as garbage and sewage continue to be discharged. Into the water, the eutrophic pollution of the water area is further deteriorated, resulting in the outbreak of a variety of severe pollution manifestations, such as odor, cyanobacteria, red tide, water hyacinth, etc. Therefore, the sewage treatment process is actually a process of supplying sufficient active oxygen to the water. Only by ensuring that there are sufficient active oxygen and dissolved oxygen in the water can the sewage treatment be thorough and there will be no subsequent sludge pollution after sewage treatment.

The working principle of the existing micro-nano device is that sewage is injected into the gas-water mixing chamber at high pressure from the water inlet of the device, and then ejected from the water outlet at the other end of the gas-water mixing chamber, and the water flows in the gas-water mixing chamber. A negative pressure state is formed when the air-water mixing chamber is in a negative pressure state. When the air-water mixing chamber is in a negative pressure state, the gas is inhaled from the air inlet and mixed with the sewage in the air-water mixing chamber. The water outlet spits out. The bubbles generated by the existing nano-devices are no more than 2 million/ml/h in water at most, the diameter of the bubbles is about 1-100 microns, the color is cloudy, the bubbles slowly float up and disappear in the water, and the existence time is about 4-8 hours. . The bubbles generated by the nanodevices of the prior art have large diameters and short existence times.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide an ultra-fine nano-generating device in view of the deficiencies of the prior art. The ultra-fine nano-bubbles generated by the spiral grooves in the gas-water mixing chamber have small bubble diameters, so they cannot be used in water. Long retention time.

The technical problem to be solved by the present invention is achieved through the following technical solutions:

The invention relates to an ultra-fine nano-generating device, comprising: a water inlet nozzle, a gas-liquid mixing chamber, a water outlet and an air inlet; the water inlet nozzle is connected with a water pump, and a spiral concave is arranged on the inner wall of the gas-liquid mixing chamber The air inlet is arranged on the gas-liquid mixing chamber and communicates with the spiral groove.

Preferably, the depth of the spiral groove is 1-2 mm, and the width is 1-2 mm.

Preferably, the gas-liquid mixing chamber is a sealed chamber.

The ultra-fine nano-generating device of the invention can rapidly increase the dissolved oxygen level, greatly reduce the power consumption of oxygen supply, reduce the amount of excess sludge and reduce the usage of chemicals, and optimize the water quality of the effluent.

The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the structural representation of the ultrafine nanometer generating device of the present invention;

FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 1 .

Detailed ways

FIG. 1 is a schematic structural diagram of an ultra-fine nano-generating device of the present invention, and FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 1 . As shown in Figure 1 and with reference to Figure 2, an ultra-fine nano-generating device includes: a water inlet nozzle 1, a gas-liquid mixing chamber 2, a water outlet 3 and an air inlet 4; the water inlet nozzle 1 is connected to a water pump, A spiral groove 21 is arranged on the inner wall of the gas-liquid mixing chamber 2 , and the air inlet 4 is arranged on the gas-liquid mixing chamber 2 and communicates with the spiral groove 21 . The depth of the spiral groove 21 is 1-2 mm, and the width is 1-2 mm. Preferably, the helical groove 21 has a depth of 0.5 mm and a width of 1.5 mm. Preferably, the gas-liquid mixing chamber 2 is a sealed chamber.

Working principle: The water inlet nozzle 1 is aligned with the spiral groove 21 to pressurize the water, and the water is accelerated and sprayed out through the spiral groove 21. The principle is similar to the rifle barrel (smooth rifling). 4. Negative pressure is formed, that is to say, since the gas-liquid mixing chamber 2 is a sealed chamber, the water flow is accelerated and discharged through the spiral groove 21 in the gas-liquid mixing chamber 2 through the pressure of the water pump, and a negative pressure is generated at the same time as it is discharged. , a gas-water mixture is formed at the water outlet 3, and the air is cut into nanostructures by water.

The nano-bubbles generated by the ultra-fine nano-generating device of the present invention are 460 million/ml/h in water, the diameter of the bubbles is 50-155 nanometers, colorless and transparent, the viscous force is greater than the buoyancy force, can produce Brownian motion, and can survive several times in water. weeks or months. According to 1mm=1000μm=1000nm, the surface area ratio of a bubble with a diameter of 1μm under a certain volume is theoretically 1000 times that of a bubble with a diameter of 1mm, that is, the contact area between air and water is increased by 1000 times, and various reaction speeds have also increased by more than 1000 times. The average diameter of nanobubbles is 50-155nm, which means that the processing capacity is more than 100,000 times that of ordinary aeration. Nanobubbles only do Brownian motion in water, and nanobubbles are 1/2000 of the rising speed of 1mm bubbles. Considering the increase in specific surface area, the gas dissolving power of nanobubbles is more than 200,000 times higher than that of ordinary air. Of course, in the case of nanobubbles, it can dissolve directly beyond saturation. The dissolved oxygen value can quickly reach a supersaturated state. Thereby, the utilization rate of oxygen is improved, so that the phosphate in the sewage is absorbed by the microorganisms. The dissolution of nanobubbles in water is a process in which the bubbles gradually shrink. The increase in pressure will increase the dissolution rate of the gas. With the increase of the surface area ratio, the shrinkage of the bubbles will become faster and faster, and finally dissolve into the water. Theoretical The pressure when the upper bubble is about to disappear is infinite. Because of the negatively charged characteristics of nanobubbles, positively charged pollutants or viruses will be adsorbed to the periphery of nanobubbles in water. The nanobubbles gradually become smaller under pressure and finally burst at about 4000MPa. When the pressure is broken, a high temperature will be generated in addition to the high pressure. Due to the high pressure and high temperature energy generated at the moment when the small nano-bubble bursts, the pollutants or bacteria will be decomposed and eliminated. At the same time, the components of the damaged pollutants are separated and floated on the water surface. When the nanobubble bursts, due to the dramatic change in the disappearance of the gas-liquid interface, the high-concentration ions accumulated on the interface release the accumulated chemical energy at once, which can stimulate and generate a large number of hydroxyl radicals. Hydroxyl radicals have an ultra-high redox potential, and the super-strong oxidation produced by them can degrade organic pollutants (such as phenol, etc.) that are difficult to oxidize and decompose in water under normal conditions, and realize the purification of water quality. This principle is the same as self-pressurized dissolution. Even when the gas content in the water body reaches the supersaturated condition, the nanobubble can continue the gas mass transfer process and maintain high mass transfer efficiency, making the nitrification speed fast and ammonia nitrogen completely removed. It is also based on the principle of large specific surface area, slow rise of bubbles and self-pressurized dissolution and finally disappears in water, greatly improving the solubility of gases (air, oxygen, ozone, carbon dioxide, etc.) in water.

Claims (3)

1. An ultrafine nano-generation device, comprising: the water inlet nozzle, the gas-liquid mixing cavity, the water outlet and the gas inlet are arranged on the water inlet pipe; the water inlet nozzle is connected with the water pump, a spiral groove is formed in the inner wall of the gas-liquid mixing cavity, and the gas inlet is formed in the gas-liquid mixing cavity and communicated with the spiral groove.

2. The ultrafine nanogenerator of claim 1, wherein the spiral groove has a depth of 1-2 mm and a width of 1-2 mm.

3. The ultrafine nano-generation device according to claim 1 or 2, wherein the gas-liquid mixing chamber is a sealed chamber.

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