Water chemistry: Optimizing boiler cleaning process
Avoiding boiler cleaning-related incidents and costs
Boiler cleaning is recommended to prevent corrosion and ensure the required thermal and physical characteristics of the boiler equipment. However, if not carried out properly, the cleaning process induces a high risk of leaks. Laborelec helps power plants assess the need for chemical cleaning, provides advice on an efficient and safe procedure, and witnesses cleaning operations.
Increasing availability, reducing costs
Our expert support for boiler cleaning provides power plants with the following benefits:
> Optimizing cleaning efficiency
We provide advice on selecting the appropriate offline cleaning procedures and processes in order to optimize cleaning efficiency.
> Avoiding operation and maintenance costs
Based on metallographic analysis and iron removal lab tests, we first evaluate whether chemical cleaning is needed or not. Without the appropriate boiler cleaning, there is a 10% probability to have an incident costing up to 800,000 euros (figure based on validated estimate of the 2011 Chemistry Platform) during the next ten years of operation. If cleaning is necessary, it is indispensible that it occurs correctly. Otherwise, the cleaning itself can give rise to corrosion pitting leading to boiler tube failures. Important breaches in the process can induce the replacement of the whole evaporator.
> Increasing availability
The goal of the technical support before and witnessing during boiler cleaning is to avoid cleaning-related incidents. We make sure the process is carried out in due time and according to in-house and international best practices in order to avoid unforeseen downtime.
> Increasing safety and reducing environmental risk
Our experts inform the plant about the environmental impact of boiler cleaning. By witnessing the cleaning operations, we help avoid errors that could affect the safety of the boiler’s immediate environment.
> Solving cleaning process problems and avoiding the complete deterioration of an evaporator in Belgium and Poland.
> Working in close collaboration with our water/ steam cycle experts, power plants in Belgium, the Netherlands, and Italy avoided chemical cleaning-related issues
Assisting boiler cleaning from first assessment to final quality check
Laborelec helps prepare the cleaning procedure, analyzes the proposal of specialist cleaning companies, witnesses onsite operations, provides assistance in case of issues, and verifies the quality of the cleaning process after completion.
BEFORE - Preparing the cleaning process
First, we carry out a short audit to assess the need for chemical cleaning. Next, when cleaning is desirable, we perform laboratory tests on boiler material samples in order to prepare the cleaning procedure. We also assist in issuing a call for tender to specialist companies and in reviewing their technical documentation. Our experts verify the different procedures planned by the contractor: chemicals injected, nitrogen circulation, chemical analysis results, temperature control on the whole boiler, duration per step, etc.
DURING - Witnessing the cleaning process
During the boiler cleaning operations, Laborelec carries out a permanent follow-up on site. Our experts monitor the works from the beginning of the acid cleaning until the final passivating step. During the process, we provide improvements to ensure an optimal cleaning.
AFTER - Validating the cleaning process
Upon completion of the cleaning operations, we carry out visual checks and collect samples from the boiler material and analyze them to assess whether the operation was successful.
Water/Steam Related subjects
Phone: +32 (0)2 382 02 08