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25/07/2019

Nine Sunplus Systems has been involved in the nozzle manufacturing and nozzle applications more than a decade, we help our customer to dig out right solutions for specific issue in various industries.

Here is to list some typical applications for nozzles:

Bottle Washing:

Bottle washing is a three or four stage process.

The number of stages depends on whether the bottle is a returned one, or is newly manufactured, the main stages are:

1) Cold water rinse

2) Chemical Hot Wash

3) Hot or cold water rinse

The bottle goes through the process standing on its base. After cleaning it is flipped over to drain away excess liquid and then, in some plants, goes through an air knife and a pre-heated oven for drying.

Most bottling plants will have a conveyer which takes between 20 and 30 bottles side by side.

A spray manifold will spray the bottles as they pass under it and along the conveyor.

Each bottle will be sprayed internally by a nozzle with a zero degree spray angle.

In this case, the nozzle sprays directly down onto the bottles internal base and then squirts back up onto the internal sides of the bottle.

This means that if there are 20/30 bottles side by side on the conveyor, each one has its own nozzle, at each stage.

As well as these nozzles, the manifold may be fitted with further nozzles which spray the outside of the bottle. Each of these nozzles will cover about three bottles.

There may be sprays from below to wash the bottle base.

There are between 12 and 14 of these nozzles on each manifold.

This is a very important part of the operation, as the outside of the bottle is the most contaminated area.

Line strainers are used on all lines in this process, as most stages in the washer have a recirculating system.

Dust Suppression on Conveyors-Dust Control:

Conveyors are used in quarries and mines to transport material of different grades either to a spoil tip or to another conveyor.

The conveyors are usually externally sited and therefore must be covered to ensure that any dust created as a result of conveying is not blown away.

The covers consist of a corrugated plastic material shaped as a lid over the conveyor.

A plastic feed pipe is fitted to the side of the plastic cover and the spray nozzles are attached to feeder pipes at various points along the conveyor.

The number of nozzles fitted depends upon the type of quarry and the material being conveyed. Usually the nozzles are fitted every 4 or 5 metres.

The type of nozzle fitted also depends upon the material being transported. they are usually hollow cone nozzles to avoid blockage problems.

For example, fine dust needs a smaller volume and a smaller droplet size in the spray, larger materials require a wider angle of spray.

As the material travels along the conveyor the finer material drops to the bottom, so at the tip off point a flat spray nozzle is fitted underneath the conveyor to damp the fines and stop them blowing away. A second nozzle is required to spray on the tipping-off point.

Water is normally drawn from a well or from a pond with a submerged pump. Filters are always fitted to the pipework either before or after the pump.

Baking - Humidification Control

In the baking industry, nozzles are used within baking ovens to provide the humidity conditions which are necessary to give the baked item, for example bread, a brown crust.

Standard mains water is sprayed onto the bread using an atomizing air nozzle.

The type of nozzle used depends upon the bakery.

The ovens are continuous flow often with 10 to 15 loaves across the width of the oven.

The ovens are fully temperature and humidity controlled.

A single nozzle is fitted between the heating elements and is used to spray a fine mist or fog of liquid into the oven area.

This action creates a blasting or flashing effect in the oven and creates the desired browning effect on the bread.

It is important to note that the sprayed liquid droplets flash-off above the bread and do not touch it.

Both the liquid and air pressure can be altered to give different volumes of liquid for different baked items.

Pressure regulators must be fitted to both air and liquid supplies.

Bottling Plants - Conveyor Lubrication

Conveying systems need to be lubricated in two different areas.

Firstly, the bearings and sprockets which help keep the conveyor moving must be kept lubricated.

Secondly, the surface of the conveyor must be lubricated especially at stages where the conveyor changes. this is done to keep products moving and to reduce wear.

These change stages are known as transfer points.

Up to 20 different transfer points will form part of a conveying system although the actual number will depend on the type of process and the plant.

Nozzles are used to provide either intermittent or continuous spraying of the lubricant.

Paper and Pulp - Edge Trimming

Paper pulp is sprayed on the belt this creates a jagged edge, which has to be trimmed, usually when the pulp is still wet.

A single high pressure water spray is used to trim the edges of the product to create a formed edge. The nozzle operates at a pressure of about 10 bar and it is fitted at a slight angle to the direction of the belt spraying a straight jet of water.

The nozzle will normally be fitted between 50 and 300 mm from the belt and within 2 meters of the pulp spray.

Sometimes this operation is carried out further on in the process, in the dry area.

If this is the case, a much higher pressure nozzle is required. One that can operate at up to 30 bar. There are many other uses for nozzles in the pulp and paper industries, such as belt cleaning, wetting or the application of special chemicals to the product.