Electric Power Industry Maintenance | nissinkiko-english

Maintenance Enterprise

Electric Power Industry Maintenance

Nissin Kiko’s diverse equipment maintenance improves productivity and quality. Maintenance for power generation equipment which supply stable electric power is essential in the electric power industry. We provide high quality maintenance cultivated from many years of experience.

Electric power industry maintenance

  • Various heat exchangers and coolers

  • High and low pressure feed water heaters

  • Flue and electric dust collectors

  • Smoke desulfurization equipment

    Seawater inlet pipes and condensers

  • Ljungstrom air preheater

Maintenance examples

Boiler gas feed water heater cleaning work

If iron rust and sulfurized ammonia sticks to the feed water heater (fin tubes), normal heat exchange will no longer be possible.

The water temperature inside the tubes will also not rise so this will further increase the formation of sulfurized ammonia.

With conventional chemical cleaners, sufficient cleaning was not possible, more washing cycles were required and this was costly. With this in mind, we have used ultra-high pressure cleaning to remove iron rust and sulfurized ammonia to restore performance to feed water heaters.

Stripping wall lining paint from inside petroleum tanks used for fuel

We have performed stripping on hard paint coating walls inside petroleum tanks used for fuel.

Ultra-high pressure water was used so as not to harm the tank structure due to factors such as impact and wear.

 In the past, scaffolding was erected and then the paint was stripped by hand. However, it is now possible to perform this operation automatically using a rotating jet and dedicated traverser (lifting apparatus). We were able to process a 300 mm width in a single operation and achieve uniform stripping.

Make-up water tank bottom glass flake stripping

We used ultra-high pressure water to strip the hard lining paint from the bottom of a tank. The work took place in a closed environment, which poses work environmental problems when using conventional sanding methods.

The use of a rotating jet improved efficiency and the work environment. Furthermore, paint fragments were separated from the drained water and treated to collect the glass fiber within the paint coat.

Latest information on electric power industry maintenance

Gas turbine intake filter cleaning (currently in R&D)

 

Intake filter booth

 

Primary side filter

Recently, along with the increase in gas turbine generators, repair costs for intake filters is on the rise and there is a demand to reduce costs.

In the past, when the filter reached the end of its life, it was replaced with a new one. However, we have been reducing processing costs based on “reducing the volume of waste” and “recycling” by cleaning filters to promote repairs that consider the environment.

White filters turn black due to dust in the atmosphere. By cleaning filters in a uniform manner and ensuring the material is not harmed, we return the performance of the filter to near 100% of its initial value.

Stripping and painting inside hydroelectric plant pipes

 

External view of small diameter water pressure iron pipe

 

Flange removal for inserting equipment

 

Paint stripping being performed inside pipe

As a stage in the renewal of small diameter water pressure iron pipe (dia. 1,100 or less) inner surface painting (tar epoxy resin), it has become necessary to strip and apply a paint coating.

Dedicated equipment is used to support pipe diameters that are so small it is impossible for humans to perform the work.

Part of the pipe is removed along its length and the dedicated machine is inserted to perform the work (see photo on left).

Automatic operation is possible using a control panel and a memory setting can be used for speeds that support straight pipes and bent pipes.

Stripping the coating and applying paint is supported by exchanging the head on the equipment.

Whether the pipe is straight or bent, the head rotating axis is constructed to keep in the center of the pipe so that uniform stripping and painting can be performed.

   
   
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