Wednesday 17 October 2018

Methods of Improving Boiler Efficiency

With all the rising cost of fuel prices, industries that use steam central heating boiler for heating or power generation are hard pressed to use at peak efficiencies.

While steam consumption, leakages, as well as other heat transmission losses can contribute to the overall energy costs, this article focuses on the heart of the steam generator – the particular boiler.

Controlling the boiler is of utmost importance in any steam creation energy saving program. Below are some ways to improve boiler efficiencies:

  • Reducing excess air
  • Installing economizer
  • Reducing scale and also deposits
  • Reducing blow down
  • Recovering waste heat coming from blow down
  • Stopping dynamic operation
  • Reducing boiler strain
  • Operating at peak efficiency
  • Preheating combustion air
  • Moving over from steam to air atomization
  • Switching to lower expense fuel
  • Reducing Excess Air

By far the most common reason for strength inefficiencies in a boiler can be attributed to the use of excess weather during combustion at the burners. When there is more air as compared to is required for combustion, the extra air becomes heated way up and is finally discharged out to the atmosphere. However , you can find reasons for putting in some extra air for combustion – to compensate for imperfect burner fuel-air mixing conditions, air denseness changes, control system “slop”, burner maintenance, fuel arrangement and viscosity variation, and imperfect atomizing steam or perhaps air controls for burners.

Adjusting the fuel-air percentage for combustion can be quite tricky. If the fuel is too significantly as compared to the air, incomplete combustion occurs. This will give rise to carbon dioxide soot deposits inside the combustion chamber or even over the central heating boiler tubes.

The consequences of having soot deposits over the heat exchange surfaces and the potential of having explosive flue gases in the boiler are much worst than losing a slight amount of electrical power through the exhaust stack. Therefore , many boiler operators want to adjust their burners to be slightly on excess oxygen.

Installing Economizer

This is only appropriate if there are insufficient heating transfer surfaces in the boiler. The economizer tubes may possibly contain either circulating boiler water or circulating nourish water. Because the temperature of the exhaust gases can be quite large, the economizer tubes may be fitted with safety valves in order to avoid over-pressure damage. Also temperature control of feed water is necessary to prevent pump airlock. To avoid corrosion, careful design is necessary to ensure that the exhaust flue gas temperature does not fall below the dew point.

Reducing Scale and Deposits

For almost any boiler operation, this is a must. The safety of the boiler is at pole. Any scale or deposits will lead to reduced heat up transfer that will eventually lead to overheating, reduction of physical strength of the steel and finally to bursting.

This should already be in the normal daily procedure of boiler operation.

Lowering Blow down

Blow down of boiler water will be discharging hot water into the drains. However , blow down is required to maintain the boiler water concentration of dissolved hues that are necessary for conditioning the boiler water. The contained solids are necessary for preventing giantech boiler corrosion and climbing.