CHEMICAL CLEANING

There are many chemical cleaning services, ranging from new construction to continuing maintenance.

New construction facilities typically undergo a pre-operational cleaning procedure. Debris, scale, oxides, and oil may be present in the piping and vessels for the plant to function properly.

Cleaning process systems, vessels, and pipes are essential for maintaining peak operational efficiency. Scales, sludge, sediments, and even metal deposits are common by-products of working operations. These accumulations clog containers and pipelines, reducing system efficiency to the point where the unit plugs up and fails.

Pre-operational chemical cleaning and post-operational or maintenance chemical cleaning are two of the most common types of chemical cleaning.

Chemical pre-operational cleaning

It is exercised to eliminate any debris leftover during the construction process, whether on the pipe or the system itself. This phase includes mill scale, corrosion products, weld scale, and oil and grease. Other construction debris is also a concern.

Post-operational cleaning

Reductions inflow, reduced heat transfer, safety (H2S and pyrophoric iron), reduced surface area (catalyst), and availability for full inspection are just a few reasons why this is done. The frequency and type of post-operational cleaning depend on the system design, operating needs, and fluid/water treatment history.

Several considerations should be taken into account while selecting a chemical cleaning procedure, including:

  • Design of a system
  • The fluid’s operational circumstances (flow, temperature, pressure, etc.)
  • Deposit characteristics and volume
  • compatibility between the cleaning solution and the system’s metals
  • Solubility of the deposit in the cleaning solution
  • Cost
  • The Health and Safety Executive (HSE) has a number.

HOW TO FILL AND SOAK

When it’s impossible to circulate water through huge tanks or pipes, the fill and soak method is frequently employed for internal surface cleaning (e.g., heat exchangers, vessels, boilers, etc.). A chemical cleaning solution is pumped into the system and then emptied after a predetermined time. This procedure can be done as many times as necessary to clean the equipment thoroughly. There is no need for agitation for mineral acids to react with metal deposits, and this application can be used for pre-and post-operational cleaning.

Pickling with Mineral Acid

With mineral acid washing, scale and corrosion products can be removed from metal surfaces. Three-step process: degreasing, collecting medals, and passivation. Concerns about the environment, safety, and disposal.

removing scale with alkaline solutions

It is just necessary to employ alkaline scale removal to remove organic deposits. If circulation cannot be achieved, it is utilized with the fill and soak approach. While agitation might improve the results, it can also be detrimental. Using steam sparging as a means of agitation is a widespread practice.