I am installing a steam coil air heater to heat seal air to precipitator insulator boxes. The warm air will blow through the end of the insulator into the dirty flue gas inside the precipitator. I want to install a humidity sensor downstream of the coil to determine when a leak occurs in the...
I have solved problems like this by breaking the pipe into 10 or more pieces. You then iterate your flow assuming sonic flow at the discharge. Breaking the pipe into pieces you can use the incompressible formulas because it limits the pressure drop per section. This works real well in Mathcad...
Liquid carryover is potentially very damaging to any compressor. A reciprocating gas compressor is typically designed with the suction bottle on the top and the discharge bottle on the bottom. This way if a little liquid carries over then the liquid will just pass through. If the bottles were...
I need to remove 2 ppm of oil from a compressed air supply. I plan to use 10 SCFM of air which was compressed using a screw type compressor to 100 psig. The compressor size is 1000 SCFM. All 1000 SCFM of air flows through standard coalescing filters, an air dryer and then an afterfilter...
I agree with GBurns. This way the valve closest to the boiler is not sacrificed. If you want to know more check out "Steam Plant Operation" by Woodruff and Lammers under blowdown apparatus.
Are you throttling flow on the discharge of your booster fan? A better method would be variable inlet vane control which is more efficient and will heat the gas less. However, the lowest practical throttling is based on leakage through the vanes.
Here are different solutions:
1. Change to...
The normal design for closed cycle cooling systems has a head tank on the suction of the closed cycle cooling pumps. For example here would be a typical order of equipment with water flowing through.
1. Head tank tied to suction line of pumps, tank at atmospheric pressure. Water level of tank...
On pumps that have threaded on impellers, reverse flow can unscrew the impeller which is not good. In addition reverse flow from an adjacent pump is wasted horsepower. A non return valve will prevent reverse flow from the other pump or from its own operation after pump shutdown.
If you want...
A centrifugal pump consists of an impeller rotating within a casing. Liquid directed into the center of the rotating impeller is picked up by the impeller vanes and accelerated to a high velocity by the rotation of the impeller and discharged by centrifugal force into the casing and out the...
Instead of designing your own eductor buy one off the shelf. Schutte & Koerting has a good catalog of which I have purchased many over the years. Don't reinvent the wheel. Try them at 215-639-0900 or www.s-k.com
I feel the best location for the blowdown is at the discharge from your condenser. This way the water is still under pressure and your blowdown pump can be sized slightly smaller and since the water is warm this reduces load on the cooling tower. (I realize this is very small.)
We have...
The ammonia injection system I have has about 20 feet of 1" piping which when in service can vary in pressure from 50 psig to 275 psig. As soon as ammonia injection stops the pressure will drop to 0 psig.
The reason I asked about purging is that the manufacturer of the skid has on the...
When performing maintenance on ammonia system piping I assume you would close valves as needed and then start your work. Is it necessary to purge the piping before breaking into the piping? Do certain industries require this? Where do you purge to? Do you purge with air or nitrogen?
In...
I am assuming this system was designed for only one of the two sump pumps to be running. The discharge piping is common to both pumps. A check valve is installed after each pump. Therefore the pressure drop of the discharge piping was likely designed for the 1250 gpm flow case. If this is...
I work for AEP. We operate 14 natural draft cooling towers in the United States. AEP pioneered the use of the natural draft cooling tower in the western hemisphere in 1963 at Big Sandy Unit 1. This tower cools 120,000 gpm. This is installed for a 260 MW plant. It stands 320 ft tall and is...
