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BUCHEN UmweltService

The composition of the chemical cleaning solution is agreed and selected with the customer in advance based on: the type of contamination, plant equipment, environmental sustainability, safety at work and cost of chemicals

Chemical cleaning process

In some industrial installations, the materials used or processed leave behind substantial residues. Once a certain degree of contamination is reached, the installations no longer perform as required. Chemical cleaning procedures in closed systems carefully remove the material deposits.

Chemical etching and cleaning

  • Cleaning and stain removal work is carried out using the circulation or spraying method

    In industrial plants, components and products are used and processed that cause contamination on and in plant installations which is particularly hard to remove. The affected facilities cease to reach the requisite heat transmission or cooling values, consume more energy or are reduced in their throughput capacity.

    Material-conserving, fast technology

    In newly built industrial plants, welding residues such as scale and annealing colours can form the basis for corrosion and product contamination. This can be prevented by etching prior to commissioning. BUCHEN offers its customers non-abrasive chemical etching and cleaning services that can remove such deposits. The cleaning solution depends on the type of contamination and the plant material. We clean, de-calcify, de-oil, de-grease, etch, passivate:

      • pipeline systems
      • heat exchangers
      • vessels, tanks
      • chemical apparatus
      • steam and condensate lines
      • boiler facilities
      • product pipelines
      • columns etc...

    The cleaning and etching work is carried out on the customer's premises by a circulation or spray method. To ensure effective cleaning, chemical pumps are available with delivery rates of 10 – 180 m³/h. The mobile cleaning stations are transported by BUCHENS's own delivery vehicles. The professional organisation of the work routines permits:

      • Fast availability and high flexibility
      • Short assembly times
      • Minimum cleaning and etching periods thanks to parallel analyses
      • Correct disposal of the etching and cleaning residues
      • Processes matched exactly to the customer's needs


      • Improved heat transmission values
      • Reduced energy requirement
      • Higher throughput volumes / capacities
      • Greater efficiency
      • Fewer operating impediments / faults
      • Lower operating costs
      • Increased service life

System flush process

  • Contamination causes a constant reduction in the transfer of heat. The plants or plant components affected are shut down at great cost in terms of time and money, before being cleaned and then recommissioned. A turnaround usually involves steaming and venting, which is associated with major environmental pollution, labour-intensive dismantling and assembly, and high-pressure water cleaning. As an alternative to this, BUCHEN has developed the new system flush, using an associated chemical, which has a proven environmental track record.

    BUCHEN system flush process is used on heat exchangers, tanks, columns, pipelines, crude oil plants and other plant components in a closed circuit

    System rinsing in the closed circuit

    With the help of special stainless steel pipelines and hoses, the installation being cleaned (e.g. crude oil plant) is connected to the pumps and separator containers. For flushing purposes, an aqueous solution with 1 % of the special chemical is used. It is heated to around 60-65 degrees Celsius and pumped into the circuit. The chemical was developed specifically to absorb oily constituents, such as mineral oil, gas oil and benzene. In a closed circuit at a pressure of up to 9 bar, the hydrocarbon pollutants are dissolved in the aqueous phase and are separated in the separator container. At the end of flushing a splitter is added to the system to effect a separation of the emulsified hydrocarbons. Since both components are biodegradable, the waste water can be fed via an appropriate oil separator into the facility's water treatment plant.


      • Reduced downtimes
      • Better energy consumption
      • Increased operating efficiency
      • Reduced maintenance input
      • Greater safety for staff
      • Reduced emissions
BUCHEN UmweltService GmbH 
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    BUCHEN UmweltService GmbH
    Emdener Straße 278
    50735 Köln
    T +49 221 71770
    F +49 221 7177110

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