January 10, 2022

Characteristics And Applications Of Spiral Nozzles

Spiral nozzles are also called desulfurization nozzles, anti-clogging nozzles, large flow nozzles, dust removal nozzles, and corrosion-resistant nozzles. They are solid cone or hollow cone spray nozzles, and the spray angle can range from 50° to 170°. , The liquid flow rate range is 5.5-4140 liters/min. This compact nozzle has an unobstructed flow path, which can minimize liquid blockage and make the liquid reach the maximum flow rate on a pipe of a given size.

Spiral nozzles can be installed or updated on most piping systems. The nozzles available are NPT or BSPT (external) threaded type. Usually 1/4 inch to 4 inch nozzles can be made of brass, 316 stainless steel castings, PVDF, silicon carbide, TEFLON polytetrafluoroethylene or polyvinyl chloride materials. If it needs to be used in special fields, it can also be made of other materials.

When the spiral nozzle is working, the liquid in the spiral is injected into a spiral metal protruding outer orifice. This breaks the traditional spray pattern in which the fluid enters the relatively fine many concentric rings to form a complete cone spray shape. The result is an uneven spray pattern, not a full cone spray pattern.

The spiral nozzle with injection application is suitable for injecting fluid into the gas stream, not into the liquid stream. The flow rate generated by the spiral nozzle can be as low as 0.534 liters per minute.

The design of the spiral nozzle is very natural and has the characteristics of anti-clogging, but in actual operation, pay attention to the selection standard of the nozzle length.

spiral nozzle


The nozzle has internal and external thread type. Usually 1/4 inch-6 inch nozzles can be made of brass, 316 stainless steel castings, TEFLON polytetrafluoroethylene or polyvinyl chloride materials. If it needs to be used in special fields, it can also be made of other materials.

Working principle:

After the liquid (or slurry) meets and collides with the continuously smaller spiral surface, it becomes tiny droplets and sprays out to form a mist. The streamlined design of the nozzle cavity from the inlet to the outlet minimizes the drag coefficient, so the spiral nozzle is suitable for various positions. For example: chemical industry, environmental protection, electric power, textile and many other industrial fields, especially the flue gas desulfurization and dust removal industry is more widely used. Its wear resistance, corrosion resistance, fogging and anti-blocking properties have been accepted by many users in this industry.

Scope of application:

1. Waste gas washing;
2. Gas cooling;
3. Washing and rinsing process;
4. Fire and fire extinguishing;
5. Used in flue gas desulfurization system;
6. Used in dust removal system.


Different from normal
A conventional solid nozzle has a blade inside, which allows the liquid to flow in a clockwise or counterclockwise direction through the guiding action of the blade, and the centrifugal force of the liquid is generated due to the action of the water pressure, thereby producing a cone-shaped spray.
The spiral nozzle is different. The spiral nozzle is a typical impact dispersion spray. The nozzle has no structure inside and is a smooth channel. The water flows through the layered interface of the impact spiral, so that the product is sprayed layer by layer.

Not easy to block
Because the spiral nozzle has no internal structure, the impurities in the waste gas and waste water can pass through the nozzle in large quantities without clogging. This is undoubtedly the best gospel for waste gas and waste water. Waste gas and waste water contain a lot of impurities, so use spiral The nozzle just solves this problem.

Multi-layer spray
The conventional 120-degree spiral nozzle has 3 to 4 layered interfaces for spraying, and some other angles even have many layered interfaces. The effect of spraying is: each interface forms a cone-shaped spray surface. Just imagine, a spiral nozzle has as few as 3-4 cone-shaped spray surfaces, and as many as 6-7 spray surfaces, which is common again How many times is the effect of a solid cone nozzle?

Many models
In terms of spray angle, spiral nozzles have 60 degrees, 90 degrees, 120 degrees, 150 degrees, 170 degrees, etc.; in terms of spray modes, spiral nozzles have hollow cone direct injection, solid cone direct injection, and hollow cone cut Directional type, hollow cone double spray, etc.; in terms of size, the spiral nozzle is from 1/4 inch to 4 inches; in terms of flow rate, from 5.5 liters/min to 4140 liters/min under 3 kg pressure; depending on the material Said, spiral nozzles include PP, PVC, nylon, PE, Sai Steel, PVDF, PTFE, TELFON, F4, ceramics, 304 stainless steel, 316 stainless steel, 316L stainless steel, silicon carbide and so on.

low cost
The cost of using spiral nozzles is low. Spiral nozzles mostly use injection molding, casting, kiln sintering and other processes. In the final analysis, they use molds to make products, which are much cheaper than ordinary metal nozzles, and it is easy to produce large quantities of goods. For example, if one hundred thousand stainless steel spiral nozzles are produced, it will take more than one month from mold opening to completion. How about processing? It is estimated that it will take more than half a year.