Injector

For other uses, see Injector (disambiguation) and Ejector (disambiguation). Diagram of a typical modern ejector. An injector, ejector, steam ejector, steam injector,eductor-jet pump or thermocompressor is a type o fpump that uses the Venturi effect of a converging-diverging nozzle to convert the pressure energy of a motive fluid to velocity energy...

Condensate Recover

Condensate Return Systems provide excellent opportunities for substantial savings in energy, water and chemical costs. Improvements to a condensate return system often are also beneficial from the perspective of production efficiencies. The cost saving due to returning the water content of condensate to the boiler as feedwater requires no great cost...

Flash vessel

BOILER BLOWDOWN is necessary for two separate and distinct reasons: 1. To ensure that the concentration of total dissolved solids (TDS) is kept below a certain maximum allowable level. 2. To prevent the accumulation of suspended solids that collect at the bottom of the boiler drum. BOILER BLOWDOWN should consequently be carried out in two distinct...

gauges glass

All boilers must be fitted with at least one pressure indicator. The usual type is a simple pressure gauge constructed to EN 12953. The dial should be at least 150 mm in diameter and of the Bourdon tube type, it should be marked to indicate the normal working pressure and the maximum permissible working pressure / design pressure. Pressure gauges are...

All boilers must be fitted with at least one pressure indicator. The usual type is a simple pressure gauge constructed to EN 12953. The dial should be at least 150 mm in diameter and of the Bourdon tube type, it should be marked to indicate the normal working pressure and the maximum permissible working pressure / design pressure. Pressure gauges are...

Air vents and vacuum breakers

When a boiler is started from cold, the steam space is full of air. This air has no heat value, and will adversely affect steam plant performance due to its effect of blanketing heat exchange surfaces. The air can also give rise to corrosion in the condensate system, if not removed adequately. The air may be purged from the steam space using a simple...

Level control chambers

Level control chambers are fitted externally to boilers for the installation of level controls or alarms, as shown in Figure 3.7.11. The function of the level controls or alarms is checked daily using the sequencing purge valves. With the handwheel turned fully anticlockwise the valve is in the 'normal working' position and a back seating shuts off...

Boiler stop valves

Fig. 3.7.3Boiler stop valve A steam boiler must be fitted with a stop valve (also known as a crown valve) which isolates the steam boiler and its pressure from the process or plant. It is generally an angle pattern globe valve of the screw-down variety. Figure 3.7.3 shows a typical stop valve of this type. In the past, these valves have often been...

Feedwater check valves

The feedwater check valve (as shown in Figures 3.7.4 and 3.7.5) is installed in the boiler feedwater line between the feedpump and boiler. A boiler feed stop valve is fitted at the boiler shell.The check valve includes a spring equivalent to the head of water in the elevated feedtank when there is no pressure in the boiler. This prevents the boiler...

I.D & FD Fans

HUMIAIR fans are of sheet steel construction with backward curved self cleaning blades. The self – cleaning efficiency of an induced draft fan will increase when the tip angle of the blade is enlarged. These fans are, therefore, suitable for:- Kitchen Exhaust Dust Collector System Fume Exhaust Welding Shops Pharmaceuticals Chemicals Engineering Industry Automobiles...

Flame

A flame (from Latin flamma) is the visible (light-emitting), gaseous part of a fire. It is caused by a highly exothermic reaction (for example, combustion, a self-sustainingoxidation reaction) taking place in a thin zone. If a fire is hot enough to ionize the gaseous components, it can become a plasma. Mechanism Color and temperature of a flame are...

Photocell

A photocell, also known as a photoresistor, is a device that changes its electrical conductivity when light shines on it. In the picture, the electricity flows through the reddish part. Normally, when light shines on it, then more electricity flows through. When it is dark, almost no electricity flows through. Selenium can be used to make photocells,...

Burner

Gas burner or oil burner, a mechanical device that burns a gas or liquid fuel into a flame in a controlled manner Gas burner.......................... A gas burner is a device to generate a flame to heat up products using a gaseous fuel such as acetylene, natural gas or propane. Some burners have an air inlet to mix the fuel gas with air to make...