| Pulp and paper |
|
|
|
|
|
Refiner maintenance in TMP mills
In the course of time, radiators get dirty and their performance decreases, which can reduce productivity. GOTAR Technologies regularly performs cleaning operations on different types of refiners in TMP mills. |
|
|
|
|
Cleaning of a ROSY cylindrical heat economizer
AbitibiBowater’s Alma paper mill had a heat economizer that had gradually lost efficiency over several months. Even after two cleaning operations, heat recovery efficiency was still low. |
|
|
|
|
Concentrator maintenance cleaning in a Kraft mill
Typically, this piece of equipment will lose a good part of its efficiency when deposits appear on the tubing inside, inhibiting heat transfer. This is exactly what happened to the tube vertical concentrator that was dealt with in this instance. |
|
|
|
|
|
|
|
Tembec - Cleaning of cooling system pipes
Many heat exchange systems use raw water from neighbouring rivers and lakes as a coolant. The advantages of this free and abundant eco-friendly method are obvious, but there can also be inconvenient downsides. Indeed, contamination by organic matter and water-borne minerals can tax cooling system efficiency. |
|
|
|
|
| Back to the list of activity sectors |
|
| Mining and primary metals |
|
|
Cleaning the cooling towers of step-down transformers (230 kV/ 50 kV)
When first commissioned in 1986, electrolysis pot line 1 at the Becancour aluminium plant nominally operated at 180 kA. Today, it operates at approximately 200 kA. Plant staff noticed that at this level of intensity, oil in the step-down transformers had a tendency to overheat, especially in summer when ambient temperatures exceeded 25°C (77°F). |
|
|
|
|
Cooling system on induction melting furnaces
The electrolytic process at the heart of primary aluminium production demands a considerable amount of energy. This creates a need for the frequent replacement of anodes in electrolytic cells, as they rapidly wear out. |
|
|
|
|
|
|
|
| Back to the list of activity sectors |
|
| Energy |
|
|
|
|
|
|
|
|
California, Watson Cogeneration - Increasing Boiler Maintenance Efficiency
Few methods are available to clean this scale, and none can compare to the solutions developed by GOTAR. At Watson Cogeneration located in Carson (California), Gotar™ products were used to clean four heat recovery steam generators (HRSGs). The purpose of this chemical cleaning was not only to remove lime scale, but also iron oxides. |
|
|
|
|
|
|
|
|
|
|
Dominican Republic : MetalDom - Cleaning of Plate Heat Exchangers
Fresh water is the cheapest and most widely used cooling liquid in the world. But for the Dominican Republic, a country located on an island in the Caribbean Sea, fresh water resources are scarce. For this reason, seawater is very often used as a cooling agent for industrial equipment. |
|
|
|
|
| Back to the list of activity sectors |
|
| Naval and maritime |
|
|
Desgagnés Tankers Inc. Original performance for the M/T Véga Desgagnés
Groupe Desgagnés is a Quebec-based conglomerate reputed for the excellence of its maritime and land operations. It operates a fleet of 17 vessels, of which 8 are tankers. Its subsidiary, Desgagnés Tankers Inc. enlisted GOTAR’s services to perform a maintenance operation on one of its oil tankers, the M/T Véga Desgagnés. After acquiring this ship, the client discovered that it had not been properly maintained, and that the main engine cooling systems were not performing properly, due to partial clogging and poor water flow. |
|
|
|
|
|
|
|
| Back to the list of activity sectors |
|
| Petrochemical and refining |
|
|
|
