Nikuni gas-liquid mixing pumps have been widely used in various water treatment equipment in different application fields at home and abroad for decades. Based on the experience accumulated in industrial pump design and application for more than 70 years and combined with the needs of equipment manufacturers to develop different application devices, Nikuni Company provides them with as much preliminary technical support and cooperation in the application process as possible, and has developed and manufactured many technologically advanced application equipment.
In the field of traditional water treatment equipment, Nikuni gas-liquid mixing pumps have greatly simplified the process design and overall structure of related equipment with their unique technical features, effectively improved the mixing effect of gas and liquid, and increased the added value of equipment while reducing the cost of equipment.
Nikuni gas-liquid mixing pumps can inhale a certain proportion of gas (air, functional gas) while inhaling liquid (water or other liquids), and evenly mix the liquid and gas during the high-speed rotation and pressurization of the impeller and send them to the outlet pipeline of the pump. Due to its structural characteristics, Nikuni gas-liquid mixing pumps are not easily affected by cavitation during gas-liquid mixing, and their performance is stable and unfailing during use, and the operation and maintenance of pumps and related equipment are also simpler.
The micro bubbles in the water mixed and released by the Nikuni gas-liquid mixing pump basically reach the micro-nano level (10-30 micron bubbles account for an absolute proportion). The gas separation tank used by the Nikuni gas-liquid mixing pump is much smaller than that used by traditional equipment. Generally, there is no need to use accessories such as release heads, which can avoid shutdown failures caused by blockage of the release head during use. The gas-liquid mixing efficiency of the Nikuni gas-liquid mixing pump can reach more than 95%, which is higher than the conventional gas-liquid mixing process.
The Nikuni gas-liquid mixing pump can be equipped with a variety of auxiliary accessories in combination with actual application needs. In some special applications, some accessories can help to make the bubbles released after the gas-liquid mixing reach the nano level that is invisible to the naked eye, bringing higher added value to equipment manufacturers and end users.
In order to deepen users' understanding of the relevant application fields of gas-liquid mixing pumps for the preparation of micro-nano bubble water and gas-liquid mixing pumps, we have collected and sorted the following information for reference based on the actual application experience of the Nikuni gas-liquid mixing pump.
1. About micro-nano bubbles
There are tiny bubbles in the liquid. When the bubble diameter is below 100μm, it is called a micron bubble, and when the bubble diameter is below 100nm, it is called a nano bubble. Because the volume of the bubble has reached the molecular level, it has physical and chemical properties that conventional macroscopic bubbles do not have, such as tens of thousands of times more surface area, which can quickly increase the dissolved oxygen content in the water, small volume and slow rise rate, can stay in the water for a long time, and the surface charge can adsorb organic matter in the water.
The micron bubbles released into the water are generally in the form of dense white smoke, while the nano bubbles released into the water cannot be identified by the naked eye (laser equipment is required for identification).
2. Characteristics of micro-nano bubbles
1. Increased surface area
Under the condition of the same volume of air, the more bubbles there are, the larger the surface area of the bubbles, the larger the total area of contact between the bubbles and the water, and the various biochemical reactions also increase exponentially.
2. Slow rising speed
The rising speed of bubbles in water is proportional to the square of the bubble diameter. Compared with macroscopic bubbles, nanobubbles are almost negligible due to their molecular volume, so they can stay in water for a long time. For example, when a bubble with a diameter of 1mm rises in water at a speed of 6m/min, while a bubble with a diameter of 10μm rises in water at a speed of 3mm/min, the latter is 1/2000 of the former. If the increase in specific surface area is taken into account, the solubility of nanobubbles is 200,000 times greater than that of ordinary air.
3. Automatic pressurized dissolution
The dissolution of micro-nano bubbles 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 in surface area, the speed at which the bubbles shrink will become faster and faster, and eventually they will dissolve in the water. In theory, the pressure on the bubble when it is about to disappear is infinite.
Micro-nano bubbles have the characteristics of slow rising speed and self-pressurized dissolution, which can greatly increase the solubility of gases (air, oxygen, ozone, nitrogen, carbon dioxide, carbon dioxide, etc.) in water.
4. Surface charge
The gas-liquid interface formed by micro-nano bubbles in water has a greater attraction to anions than cations, so the bubble surface often carries a negative charge, which enables micro-nano bubbles to adsorb organic matter in water and also have antibacterial effects.
3. Application of micro-nano bubble production equipment
1. Aquaculture
A) Rapidly increase dissolved oxygen
The principle of micro-nano bubble oxygenation is different from the conventional microporous rubber tube oxygenation method. After nanobubbles are injected into the breeding pond, the oxygen concentration in the water increases rapidly, and the micro-nano bubbles can diffuse to every place in the pond by themselves, making the dissolved oxygen distribution uniform;
B) Shorten the breeding cycle
Since the diameter of micro-nano bubbles has reached the molecular level, they can be directly absorbed by aquatic animal cells, penetrate the cell wall and directly act on the inside of the cell, thereby improving the metabolism of aquatic products, promoting growth, and achieving early release, staggered listing, and high-priced sales; this effect also greatly reduces various risks in breeding;
According to a report by Japan's NHK TV station, the breeding cycle of this fish after being cultured in oxygen-enriched water has been reduced from the conventional 24 months to 14 months;
C) Increase breeding density
Since nanobubbles can stay in the water for a long time, under the same breeding conditions, the use of nanobubble breeding can increase the breeding density. For example, in a 2m*2m*1.5m tank, 1.5 times the density of shad was cultivated. After 5 minutes, the oxygen concentration in the water increased from 7.6mg/L to 7.9mg/L, and gradually increased to 8.3mg/L within 25 minutes;
D) Save the cost of medication
Nano bubble water is essentially different from the oxygen powder (calcium peroxide) sold on the market, reducing the repeated medication costs of farmers. At the same time, due to the large increase of nanobubbles in the water body, the growth of anaerobic bacteria can be inhibited to a certain extent, the water body can be kept clean, the input cost of disinfectants can be reduced, and the secondary pollution of disinfectants to the growth of aquatic products can be avoided;
E) Leading technology
In nanobubble water, the number of bubbles per milliliter has increased by at least one order of magnitude, up to 4.0×107 nanobubbles per milliliter, which is far superior to inefficient production methods such as ultrasound or electrolysis;
F) No chemicals are added
The dissolved oxygen content in water can be quickly increased in a short time. Nanobubbles and the process of injecting nanobubbles into water are 100% physical reactions, without adding any chemicals, and there is no pollution to aquatic products and the surrounding environment; the nanobubble generator is made of food-grade stainless steel, which is corrosion-resistant and durable, and has no effect on the growth of aquatic products.
2. Agricultural hydroponic cultivation
Based on the same principle, watering between ridges or using drip irrigation pipes to apply water containing micro-bubbles, nutrients or ozone gas during the planting of agricultural fruits and vegetables or grain crops can greatly increase the supply of oxygen and nutrients to the roots of crops or improve the sterilization effect to protect plants from diseases.
Taking the cultivation of ginger or strawberries as an example, after farmers apply liquid containing micro-bubbles to the roots of crops, the roots and stems of crops are much thicker than before without micro-bubble liquid, with stronger disease resistance and better growth.
3. Food preservation
In terms of food preservation applications, it is mainly to sterilize fruits and vegetables, raw meat and fresh fish with ozone water or to fill the storage tank with nano-nitrogen bubble water to isolate the air for treatment, ensuring that the freshness of these fresh fruits and vegetables, fresh meat and fresh fish is extended several times longer than the conventional case without ozone or nitrogen. This not only ensures that the quality of the products delivered to users is reliable and fresh, but also allows merchants to avoid economic losses caused by improper preservation.
4. Ozone water sterilization
Ozone gas produced by discharge tube or electrochemical method is a broad-spectrum strong oxidizing bactericidal agent. Functional micro-nano ozone bubble water can achieve harmless non-thermal sterilization. Because of its strong oxidizing and sterilizing ability and no secondary residue, it has been widely used in drinking water and medical pure water treatment, high-rise secondary water supply sterilization, swimming pool water treatment, aquaculture water treatment, circulating cooling water treatment, industrial wastewater and sewage treatment for many years.
Ozone micro-nano bubble water is also a widely used disinfection and sterilization medium obtained by using a gas-liquid mixing pump to evenly dissolve ozone gas in water in the form of fine bubbles. It can replace a variety of disinfection and sterilization agents.
Due to limited space and the common knowledge about ozone application that can be obtained from the Internet, the specific application of ozone water will not be described in detail here.
5. Wastewater and sewage treatment
A) Rapidly increase the dissolved oxygen in water
When a large number of micro-nano bubbles are injected into the water, the dissolved oxygen in the water can be rapidly increased, promoting the growth of aerobic bacteria, which can quickly decompose organic matter in the water; at the same time, the growth of anaerobic bacteria is inhibited, effectively controlling the deterioration of the water body and keeping the water clean. Compared with the conventional microporous bubble oxygenation method, micro-nano bubbles will not float up and dissipate quickly, but can stay in the water for a long time, which can greatly improve the water quality and play a role in water purification;
B) Rapidly purify water quality and improve transparency
Air, oxygen or negative oxygen ions can be injected into the water according to environmental needs. When negative oxygen ions are injected into the water, the water purification effect can be achieved within 60 minutes. Since ozone is extremely unstable, it can decompose into oxygen within 30 minutes. Since ozone is a substance existing in nature, it will not cause any impact on the surrounding environment and human body in outdoor environment;
C) Adsorb and separate organic matter in water
Research has found that since the surface of nanobubbles carries an electric charge, they can adsorb organic matter in water, causing it to float or sink, and thus can achieve rapid cleaning; they can also reduce eutrophication caused by organic matter deposition, and effectively control water pollution, oil pollution and other problems;
D) No enzymes or nutrients need to be added
Compared with conventional river aeration and oxygenation methods, the Nikuni gas-liquid mixing pump mixes a large number of micro-nano bubbles into the river water, making it stay in the water for many times longer, while reducing the amount of medicine added, reducing the cost of medicine investment, and reducing the secondary pollution of medicine to the environment and the cost of post-processing;
6. High-end leisure bathing facilities
Nikuni gas-liquid mixing pumps are widely used in the field of high-end leisure bathing facilities. The main application forms include:
A) Milk bath
Release micro-nano bubble water in the bathtub or bath, and turn the bath water into a thick milky white color like milk), so that the bather can feel the refreshing feeling when the fine bubbles touch the skin in the water.
In some high-end bathing facilities, merchants also use the milky white bath water surface as a screen, and use projection equipment to project beautiful videos on the water surface in a dim atmosphere accompanied by soft music, so that the bather can relax and feel the wonderful artistic conception of entering the fairyland;
B) Functional water fitness bath
Release micro-nano carbonated water or a certain concentration of hydrogen water in the bathtub or bath, so that the bather can enjoy the maintenance and health care effects of micro-nano functional micro-nano bubble water in different media on the human body.
C) Comfortable and enjoyable bath
LED lights of different colors are projected into the micro-nano bubble water bath to create an aesthetic and enjoyable atmosphere of ruby, sapphire and emerald tones, allowing bathers to enjoy the pleasure of bathing and skin care while feeling a good time;
With the promotion and popularization of the application technology of Nikuni gas-liquid mixing pumps, many domestic equipment manufacturers have also begun to promote similar leisure and entertainment bathing facilities.
Nikuni gas-liquid mixing pumps have complete product specifications, with cast iron and stainless steel materials corresponding to various applications. At the same time, Nikuni also provides users with technical support related to the application of pumps. Welcome to purchase.
