How effective is the fine water mist nozzle?

Water mist nozzles are one of the many fire extinguishing nozzles and are currently used in many fields. So how effective is the fine water mist nozzle? The water mist nozzle sprays small droplets with a small diameter, consumes less water, and is more environmentally friendly. The water mist formed under the action of pressure has good fire-extinguishing capabilities and is suitable for many scenarios where ordinary fire sprinklers cannot be used. It is undoubtedly a better choice for fire prevention and extinguishing in the fire protection industry.

1. Effect of fine water mist nozzle

The characteristic of water mist is that it can have two fire extinguishing and suppression effects, namely gas and traditional sprinkler fire extinguishing systems. The gas fire extinguishing effect is to remove oxygen, and then use the traditional spray effect to cool the flame. The fine water mist nozzle can exert the cooling and wetting effect to a greater effect, thereby reducing the risk of fire re-ignition. Installing a water mist fire extinguishing system on a building can provide multi-dimensional three-dimensional protection, replacing various firefighting methods such as gas, aerosol, foam, water spray, and water spray.

Water mist nozzles can also replace mechanical smoke exhaust devices, fire shutters, water curtain systems, etc. The water mist system is simple and stable, and the nozzles have no impact on people when spraying. The following is the effect of using fine water mist nozzles:

1. Reduce smoke and make evacuation easier

2. Good insulation performance

3. High fire extinguishing efficiency

4. Safe and pollution-free

5. Block thermal radiation

6. Little loss in fighting

7. Easy to install and maintain

8. Strong applicability

2. Function of fine water mist nozzle

1. High efficiency cooling effect

Since the droplet diameter of fine water mist is very small, the diameter of mist particles in ordinary water mist systems is 10~100um. During the vaporization process, a large amount of heat is absorbed from the surface of the burning material or the fire area. Calculated based on the latent heat of evaporation of 100°C water being 2257kJ/kg, the heat absorption power of the water mist ejected by each nozzle (water spray speed 0.133L/s) is approximately 300KW. Experiments have shown that the smaller the diameter, the greater the heat absorption per unit area of ​​the water mist, the faster the droplet speed, and the smaller the diameter, the higher the heat transfer rate.

2. Suffocation effect

After the fine water mist is sprayed into the fire scene, it quickly evaporates to form steam, and the volume rapidly expands 1700 to 5800 times, reducing the oxygen volume fraction and forming a barrier around the burning material to prevent the inhalation of fresh air. As water vaporizes rapidly, the water vapor content will rapidly increase. At the same time, when the oxygen content decreases to 16% to 18% in the space around the fire source, the flame will be suffocated. In addition, the mist droplets in non-burning areas outside the fire scene will not vaporize, the oxygen content in the air will not change, and will not endanger people's lives.

3. Block radiant heat effect

After high-pressure water mist is sprayed into the fire scene, the steam formed by evaporation quickly covers the burning materials, flames and smoke. It has a better blocking ability for the radiant heat of the flame, and can effectively inhibit the radiant heat from igniting other surrounding items to prevent the spread of flames. The attenuation effect of water mist on radiation can also be used to protect the lives of firefighters.

4. Dilution, emulsification, and infiltration

The mist droplets with large particles and large impulse will impact the surface of the burning material, thereby soaking the burning material, preventing the further generation of solid volatile combustible gas, and achieving the purpose of extinguishing the fire and preventing the spread of the fire. In addition, high-pressure water mist also has the functions of washing smoke and exhaust gas, emulsifying and diluting liquids, etc.

3. Application range of fine water mist nozzles

Fine water mist has fire extinguishing functions of high efficiency, water saving, safety and environmental protection, and also has special functions of reducing smoke, temperature and poison. It can quickly isolate the fire source, effectively degrade and block smoke and toxic gases at the fire scene, and form an escape passage, which is conducive to personnel evacuation and protects the lives of firefighters. Water mist nozzles are suitable for fighting the following fires:

(1) Combustible solid fire (Class A):

Fine water mist nozzles can effectively extinguish combustible solid surface fires in relatively closed spaces, including paper, wood, textiles, plastic foam, rubber and other solid fires.

(2) Flammable liquid fire (Class B):

Fine water mist nozzles can effectively extinguish flammable liquid fires in relatively closed spaces, including low flash point flammable liquids such as n-heptane or gasoline, and medium and high flash point flammable liquid fires such as lubricating oil and hydraulic oil.

(3) Electrical fire (Class E):

Fine water mist nozzles can effectively put out electrical fires, including fires in cables, control cabinets and other electronic and electrical equipment, and transformer fires.

4. Fine water mist nozzle manufacturers

There are many manufacturers of fine water mist nozzles. Anhui Lanzhong Electromechanical is currently a relatively mature manufacturer of fine water mist. It has a wide range of products, including not only fine water mist nozzles, but also fine water mist guns, water pumps used in water mist systems, etc. It has cooperated with many domestic and foreign companies to provide them with various types of fine water mist products.

Anhui Lanzhong Electromechanical has a professional design, processing and testing team and a series of precision equipment for the production and testing of nozzles; and has passed ISO9001 quality management system, ISO14001 environmental management system and OHS18001 occupational health and safety management system certification.

Lanzhong participated in the preparation of relevant standards and monographs on water mist and perfluorohexanone fire extinguishing technology, and established cooperative research and development relationships with multiple inspection agencies, universities, and enterprises. At present, in the fields of fixed water mist fire extinguishing systems, mobile water mist fire extinguishing devices and other product fields, Landzhong has developed various types of water mist nozzles and water mist spray guns; in the field of perfluorohexanone fire extinguishing systems, it has cooperated with customers to develop various types of nozzles and nozzles for perfluorohexanone fire extinguishing agents; in the field of fixed fire extinguishing systems for bus cabins, Landzhong has developed core components such as DC water pumps and nozzles.

5. Price of fine water mist nozzles

Compared with ordinary fire sprinklers, the price of water mist sprinklers is relatively high, but its fire extinguishing effect is much better than ordinary fire sprinklers, and it is safe and stable, so the demand in the industry is very large. The price of fine water mist nozzles on the market is generally between 100-200 yuan, depending on the model of the nozzle and the quantity required by the customer. The following is the reference price of Anhui Lanzhong electromechanical water mist nozzles:

1. Price of high-pressure open water mist nozzle: 100 yuan/piece

2. Price of high-pressure closed water mist nozzle: 200 yuan/piece

3. Medium-pressure open water mist nozzle price: 100 yuan/piece

4. Medium-pressure closed water mist nozzle price: 100 yuan/piece

5. Dual-start mode water mist nozzle price: 240 yuan/piece

The use effect of fine water mist nozzles is very good, and the life of fine water mist nozzles is long. It only needs normal maintenance and repair, and it can be used for a long time. Water mist nozzles have now become a hot item in the fire protection industry. They have high fire extinguishing efficiency, low water consumption, safety and environmental protection, and are favored by customers from all walks of life. As a reliable manufacturer of fine water mist nozzles, Anhui Lanzhong Electromechanical can provide customized services of fine water mist nozzles according to customer needs. If necessary, you can consult directly online.

Water mist nozzle related information:

Fine water mist nozzle specifications

Classification of fine water mist nozzles

Fine water mist nozzle parameters

What are the brands of fine water mist nozzles?

What are the models of fine water mist nozzles?