Industrial boiler divide into two types according to combustion, one is fire tube boiler, another one is water tube boiler.
 |
| fire tube boiler vs water tube boiler |
The subsequent stage in the act is usually to boil water and make steam. The goal should be to make heat flow as completely as possible from the flame on the water. The lake is confined within a restricted space heated by the fire. The steam produced has lower density versus the water and so will accumulate on the highest level within the vessel; its temperature will at boiling point and definitely will only increase as pressure increases. Steam in this state (in equilibrium with all the liquid water and that is being evaporated inside boiler) is termed "saturated steam". By way of example, saturated steam at atmospheric pressure boils at 100 °C (212 °F). Saturated steam removed from the boiler could have en trained water droplets, however a well designed boiler will supply virtually "dry" saturated steam, with very little en-trained water. Continued heating in the saturated steam brings the steam into a "super-heated" state, in which the steam is heated to some temperature above the saturation temperature, with no liquid water can exist under cures. Most reciprocating steam engines of the 1800s used saturated steam, however modern steam power plants universally use super-heated steam which allows higher steam cycle efficiency.
Diagram of any water-tube boiler.
A way to rapidly produce steam should be to feed the stream being forced in a tube or tubes between the combustion gases. The earliest instance of this became developed by Golds-worthy Gurney inside the late 1820s to be used in steam road carriages. This boiler was ultra-compact and light in weight and this also arrangement has since get to be the norm for marine and stationary applications. The tubes frequently possess a large number of bends and sometimes fins to optimize the top area. This type of boiler is normally preferred in questionable applications because the high pressure water/steam is contained within narrow pipes which may contain the pressure having a thinner wall. It can however be subject to damage by vibration in surface transport appliances. In a cast iron sectional boiler, sometimes known as the "pork chop boiler" the water is contained inside surefire sections. These sections are mechanically assembled on site to build the finished boiler.
Difference between fire tube boiler and water tube boiler can view here: http://www.zghorizontalboiler.com/water-tube-boiler-vs-fire-tube-boiler.html
没有评论:
发表评论