I am looking for some background information as to advantages and disadvantages (technical and commercial) of refrigerated or pressurized storage (vessels and spheres) of LPG at a terminal. Typical storage quantity is 30,000 m3.
Additionally, I'd also like to understand how choosing either...
I am currently involved in transferring a plant design for Asia to the UK.
As a starting point I would like to specify the typical climatic conditions for the UK. Does anyone know where I can find this data.
Typically I need
Temperatures max and min
Atmospheric Conditions
Rainfall
Humidity...
I want to calculate the cost of raising steam from a natural gas fired boiler.
If I have mains uninterruptasble natural gas at say 2 pence per KWh and a boiler that is 80% efficient how do I calculate the cost of raising 10 barg saturated steam?
I think it will work out about £15 per te but I...
If I have a 10 mm particle (assume spherical) with a density of 200 kg/m3, falling vertically under gravity into an horizontal airstream at 15 m/s in a duct of a known diameter,how do I calculate
a) whether the particle will be carried in the airstream
b) if the particle is not carried on the...
I currently have an system that moves air and dust that is rated at 5000 m3/hr and the pressure drop through the sysem is measured at 20 m/barg.
I need to extend the system so that 5 of the 'units' above all operate in parrallel, all tying together just before a new fan that I need to specify...
I am looking at installing a new dust conveying and filtration system as part of a plant expansion.
The unit we currently have uses positve pressure filtration to remove the dust fines (cyclone to remove most of the particles, then a fan blowing any entrained dust into cloth filter bags).
My...
I have a system which conveys powder in an air stream. The air is conveyed by a fan in the middle of the system
The system goes through a number of unit stages and pipework.
I need to develop a number of system curve and understand the pressure profiles and velocity through the system on...
can anyone point me in the direction of any 'Best Available Techniques (BAT)' for the UK
I'm looking at designing a small (~40 m³) storage tank to recieve road tanker deliveries of 25% Aqeous Ammonia in the UK
Currently the design is for an atmospheric tank with an assoicated scrubber - where...
I currently have a relief vent header (potentially containing a flammable gas stream) that is routed to a scrubbing system and subsequent downstream processing.
Under certain circumstances (ie loss of scrubber water flow) there is a requirment to 'bypass' the scrubber and downstream processing...
Is there an accepted/recommended method for sizing an overflow for an atmospheric tank where an independent vent line is also incorporated
The tank I am looking at contains hot water and has an independent vent line coming off the top. It also has an overflow set ~ 0.5 m from tan line coming...
I have a a scenario where I have to pump up 30m vertically from a datum level to get over a building. The pipe is then ran back to ground level where it discharges atmospherically into an open pit. The discharge point is pretty much at the datum level.
My understanding of static discharge head...
I am looking for Low and High explosivity limits (% v/v) for ethanol in environments other than air.
Specifically I am looking at how increasing the CO2 concentration within a vessel could mitigate the risk of a potential explosive environment, by reducing the oxygen to below a point where it...
I have a pump datasheet quoting a 50 m shut off head.
The NPSHr is 1m and there is 10m available - both quoted on the datasheet.
Is the vertical lift from the pump 50m, or do I need to add the NPSH availble?
can someone give me a definition of 'shut off pressure' on an automated isolation valve. The valve is spring return fail close butterfly valve.
Is the shut off pressure the maximum process line pressure where the valve is gauranteed to close and not to pass, or something else?
I am after some rule of thumb design info looking at recommended air velocity requirements for transporting powder through pipes,
The application is for a a system where material is fed off a vibrator in air, rather than coming in a compacted form
I have a recollection of using 15 - 25 m/s as...
I have a small storage tank (~1m³ vol) used to hold 5% aq Ammonia.
The tank is at atmospheric pressure and under ambient conditions. Can someone remind me how I can calculate the concentration of NH3 vented off, when the tank is re-filled? A typical re-fill would be 500 litres. The tank is...
We have an operation which transfers Aq NH3 (34% w/w) via centrifugal pump (~4 barg) from one vessel to another. Both are at atmospheric pressure.
I have looked at potential hazards if a valve in the suction line is left shut, but now want to look at the situation if the suction valve is open...
