Areas of Application

Pulp and Paper

Roto-Fan® Application in the Celluloses and Paper Industry

A pipe-cleaning procedure with high-pressure water is well known in the paper industry. A high pressure hose with retro-nozzle in front is normally pushed into the pipe to be cleaned by hand.. The nozzle itself is driven into the pipe by the reaction force and the retro-jets, but the cleaning quality often is insufficient. Pressures up to 700 bars and pumps of 150 hp are normally used. This method can be radically improved by using the VELTRUP Roto-Fan® System.

The VELTRUP Roto-Fan® System

A rotating high-pressure water cleaning device with precisely synchronized forward feed of the nozzle.

The manual handling of the high pressure water hose during the operation is completely eliminated and the ability to negotiate and clean a great number of bends in pipes is greatly improved by the reduction of friction resulting from the rotation of the hose.

It has been found that the System is capable to work with the same efficiency from ID10- ID 2000mm. Cleaning lengths of several hundred meters have been achieved even if there were elbows, valves or similar restrictive passages in the pipe system to be cleaned. There is not much space required in front of the pipe to be cleaned.

The linear advance synchronized with the rotation of the nozzle provides a thorough and even cleaning of the entire surface of the pipes. The resulting even smoothness of the pipe interior reduces the built-up rate subsequent encrustation compared with pipes unevenly cleaned by non-rotating methods.

The VELTUP-Roto-Fan-System works insitu, which means that dismantling and stripping cost for pipe work or heat exchanger bundles are avoided.

The VELTRUP-Roto-Fan® System is the most efficient rotating and self-advancing high pressure water cleaning system of this type currently on the market. In recent years this System has been operating in a variety of industrial plants, particularly in paper mills, celluloses plants, etc., where considerable problems or pipe encrustation occur.

A considerable number of paper mills and celluloses plants in Europe, USA and Asia achieved a substantial reduction in downtime using our System.

The main areas of application are:

  1. Insitu-Cleaning of Black-and Green-Liquor Lines

    The removal of very hard encrustations in long pipes (ID300 mm, cleaning length 150 m) with many 90 bends.

    It was found that the pipe cleaning speed and cleaning quality was increased dramatically. No manual labour was necessary during the cleaning procedure thereby reducing labour cost and permitting the operator to just remotely control the cleaning process. Typical cleaning rates between 1-2.5m/min. were achieved.

  2. Heat-Exchanger-cleaning (Insitu)

    It has been found that heat-exchangers (e.g. ID 32 mm), which due to the process get constantly blocked with extremely hard encrustation can be cleaned quite easily with the rotating system. After a cleaning procedure with the VELTRUP Roto-Fan® System, the operating time of the heat-exchanger between necessary heat-downs was significantly increased. Manual Work again was eliminated. The operator just had to remotely control the System.

  3. Pipe cleaning of pulp-lines etc. on paper machines

    These lines were cleaned with very high cleaning speed to perfect finish during shutdown periods. It was successfully avoided to use chemicals detergents for cleaning. Typical were 80 mm - 1500 . The cleaning rates were between 1-5 m/min.

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Mill Water Line

Mill water line before cleaning After cleaning Removed deposits Other line before cleaning After cleaning Mill water line During cleaning Line from deep well after Descaling
 

Cooling Towers

Set-up Opening of entry points Descaling operation Work in progress at entry point cooling tower Opened entry points Line further down before cleaning During cleaning After cleaning Removed deposits
LIST OF REFERENCES IN THE PHILIPPINES
CLIENT
LOCATION
TRUST INTERNATIONAL PAPER COMPANY
PAMPANGA
LIST OF REFERENCES(WORLDWIDE)
CLIENT
COUNTRY

CLIENT
COUNTRY
GOLDEN HOPE FIBREBOARD
MALAYSIA
PAPIERFABRIK, LEINFELDEN
GERMANY
HUME FIBREBOARD
MALAYSIA
SCHWAB ZELLSTOFF, EHINGEN
GERMANY
PAPIERFABRIK, LAHNSTIEN
GERMANY