· PDF fileHorizontal straight tube boilers (a) Longitudinal drum (b) Cross-drum. 2. Bent tube boilers (a) Two drum (b) Three drum (c) Low head three drum (d) four drum. 3. Cyclone fired boilers Various advantages of water tube boilers are as follows: (i) High pressure of the order of 140 kg/cm2 can be obtained. (ii) Heating surface is large. Therefore steam can be generated easily. (iii) Large heating …

The main function of the steam drum is to provide water storage and space to separate steam from water. Mud or Water Drum Mud or water drum the lower drum is directly attached to upper steam drum with large no of straight tubes bundles called boiler bank tubes. Solids and mud can settle in this mud drum for removal through periodic blowdown.

04-03-2020· Babcock-Wilcox Boiler is also known as Longitudinal Drum Boiler or Horizontal Tubes Boiler. In this type of boiler, one cylindrical drum is longitudinally placed above the heat chamber. In rear of the drum down comer tube is filled and in front of the drum riser tube is fitted as shown in the figure.

A boiler stay is an internal structural element used inside boilers. Where the shell of a boiler or other pressure vessel is made of cylindrical or (part) spherical elements, the internal pressure will be contained without distortion. However, flat surfaces of any significant size will distort under pressure, tending to bulge. Stays of various types are used to support these surfaces by tying them together to resist …

04-05-2017· Water tube boiler working and function 1. Water Tube Boilers ï‚— In this type of boiler water passes through the tubes while the gases remain in the shell side, passing over the tube surfaces • Used for high steam demand and pressure requirements • Capacity range of 4,000 – 120,000 kg/hour 2.

Water-tube boilers with longitudinal steam drums, as in Fig above were developed to allow increases in generated steam pressure and increased capacity.

Modern high capacity boilers are of water tube type. The boiler circulation system is constructed of tubes, headers, and drums joined in arrangement that provide water flow to generate steam. Water tubes have high pressures and capacity than shell tube boilers. These boilers can be of single- or multiple-drum type.

14-02-2018· The primary function of a boiler is to generate steam,from the water suppelied. Fuels like coal, furnace oil, baggase etc are generally used to supply the required heat.The steam produced is either used directly in process application or used to r

The longitudinal drum boiler was the original type of water-tube boiler that operated on the thermo-siphon principle (see Figure 3.3.5). Cooler feedwater is fed into a drum, which is placed longitudinally above the heat source. The cooler water falls down a rear circulation header into several inclined heated tubes.