Blow Away Your Soot!

Written by Thomas Yoon

A boiler that has been running for a long time is sure to have soot deposits on its tubes and furnace.

This is especially prominent in boilers using heavy fuel oil for burning. Althoughrepparttar fuel will be heated and filtered before combustion, it still contains a lot of impurities. The by-products of combustion as well as imperfect combustion causerepparttar 133427 soot to form. The soot is deposited onrepparttar 133428 heating surfaces.

Duringrepparttar 133429 combustion ofrepparttar 133430 fuel oil in a steam boiler, hot gases are formed. These hot gases are used to heat uprepparttar 133431 water inrepparttar 133432 boiler to form steam.

Withrepparttar 133433 deposits of soot, a lot ofrepparttar 133434 heat energy is not able to be transferred torepparttar 133435 water, but instead is lost throughrepparttar 133436 chimneystack. The soot layer acts as a heat insulator forrepparttar 133437 tubes and shells ofrepparttar 133438 furnace. The heat is unable to reachrepparttar 133439 water.

This not only causesrepparttar 133440 boiler efficiency to be lowered, but a more serious problem can also occur. The soot can catch fire!

A soot fire can be detrimental torepparttar 133441 strength ofrepparttar 133442 boiler because it can cause serious localized hotspots to occur at repparttar 133443 tubes. These localized hotspots can even reach temperatures that weakenrepparttar 133444 materials ofrepparttar 133445 tubes.

Soot blowers are installed to blow away these soot deposits. Steam is normally used as a medium for blowing awayrepparttar 133446 soot.

The operation ofrepparttar 133447 soot blowers goes like this:

1. Steam is channeled torepparttar 133448 soot blower pipeline. 2. The operator ofrepparttar 133449 soot blower will open a drain valve to drain off any water inrepparttar 133450 steam. This is to make sure

Cooling Towers - the Industrial Workhorses

Written by Thomas Yoon

Industrial Processes usually produces a lot of heat. Air-conditioning also removes heat fromrepparttar indoor areas through heat exchangers.

Where does allrepparttar 133426 heat go?

All these heat has to be removed. If you are not nearrepparttar 133427 sea, you have to use cooling towers to cool down your warm water.

Cooling towers make use of air currents to cool warm water. However, a basic rule has to be made when you want to extract heat from any object, including water. Heat has to be taken from a higher temperature source to a lower temperature medium.

Ifrepparttar 133428 air is already warm, it will not be able to cool downrepparttar 133429 warm water. The temperature difference is very important.

Another important point in cooling tower efficiency is how muchrepparttar 133430 water is exposed torepparttar 133431 air. Ifrepparttar 133432 water is allowed to trickle down, and their contact surface withrepparttar 133433 air is made large, more heat exchange takes place.

Plastic diffusers designed with wavy patterns are inserted at cooling towers to increaserepparttar 133434 contact surfaces ofrepparttar 133435 water when it meets withrepparttar 133436 cooling air stream.

There are several shapes of cooling towers, but they operate onrepparttar 133437 same principle.

There are basically 2 types airflow patterns in cooling towers:

The cross-flow type of cooling tower makes use of air flowing at right angles torepparttar 133438 water dropping down. The fans are positioned so thatrepparttar 133439 air stream flows throughrepparttar 133440 cooling tower fromrepparttar 133441 sides. Water is distributed atrepparttar 133442 top, and is allowed to drip down to meet withrepparttar 133443 air.

Cont'd on page 2 ==> © 2005
Terms of Use