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[China]
Trade Verify
Contact name:Mark Zhang
YIWU YUXING IMPORT AND EXPORT FIRM |
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Verified Suppliers
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Nozzles play an extremely important role in the papermaking
process. From the headbox, wire pressing section, drying section,
and winding section, nozzles are everywhere. The effect of the use
of the nozzle directly affects the quality of the paper, so
although the nozzle is small, it is an important part that paper
mills cannot ignore. The nozzle is mainly used in the cleaning
process in the papermaking process. The cleaning effect determines
the quality of the paper. In many paper companies, workers haven't
really realized this. A small nozzle can often solve many problems,
but improper selection may lead to paper problems, such as
wrinkling, curling, flooding, etc.
There are five main applications of paper nozzles in the paper
industry:
1. Paper net cleaning, press cleaning, blanket cleaning, blind hole
roller cleaning, groove roller cleaning, etc. Generally, fan-shaped
nozzles, high-pressure needle nozzles, and self-cleaning fan-shaped
nozzles are used for cleaning. The cleaning effect of the net is
the key that cannot be ignored in the papermaking process. The
occurrence of most paper diseases in the process has a great
relationship with the cleaning of the net department. The use of
high-quality nozzle products has a significant effect on both the
cleaning effect and the production efficiency. The common pressure
for cleaning the screen is 25-30Bar. For high-speed paper machines,
it is generally used in conjunction with a swing device.
2. Cut the paper edge. The paper edge is mainly cut with a
high-pressure needle nozzle. The nozzle can form a linear
needle-shaped liquid column flow under different pressure
conditions and can withstand pressures up to 140 bar. The main body
can be made of brass or 316L stainless steel. Choice of 316L
stainless steel, hard alloy, ceramic, ruby or sapphire. The
performance of the cutting edge water jet directly affects the
paper quality and is one of the key links in the papermaking
process. The precision of water jets and the level of wear
resistance have a great impact on paper quality and workshop
efficiency.
3 Defoam the pulp. To remove the foam in the pulp, hollow cone
nozzles and spiral nozzles are generally used.
4, paper coating spray. The surface coating spray of paper
generally adopts fine water mist nozzle and air atomization nozzle.
5. Tank cleaning. Tank cleaning in paper mills can use tank
cleaning nozzles for fast cleaning. And lower cleaning costs
6. Dry net cleaning / paper cutting
The quality of the dry net cleaning is directly related to the
surface quality of the paper product. Due to the special location
of the dry net, it is necessary to use extremely high pressure for
cleaning, which puts extremely high requirements on the performance
of the nozzle. Generally, cemented carbide or sapphire is used.
7. Low pressure spray and lubrication
Generally, fan nozzles are used, and the pressure is mostly 3-5
Bar. The correct choice of model has a direct impact on water
consumption and clogging. The correct choice of nozzles has a
significant effect on water saving and energy saving and spraying
effects.
Low-pressure fan-shaped papermaking nozzle
When the spraying height of the spray rod and the net surface or
the blanket is very small, the thin-sheet low-pressure fan-shaped
papermaking nozzle is the best choice. The nozzle is made of 303 or
316 stainless steel, which has excellent wear resistance and
corrosion resistance. Generally used in the field of low-pressure
fan cleaning, doctor blade water absorption and lubrication
Incorrect use of nozzles can cause other problems:
(1) Poor cleaning effect will affect the service life of felts,
forming nets and rollers;
(2) Poor spray coverage and overlap will affect paper quality;
(3) the use of inappropriate nozzles leads to more water and chemical waste;
(4) It is easy to cause unnecessary downtime maintenance and increase operation and maintenance costs.
