INJECTION QUILL PROBE DIMENSION 1

[xnabrar]

Hy All,

Is there any reference for the below injection quill probe distance/insert inside the pipe.
NPS is 10''

 

[LittleInch]

You need to get the vendor to certify this for vortex vibrations for the fluid and max velocity / flow rate you will see.

Otherwise somewhere between 0.3D and 0.5 D in my experience.

0.5 if you can, but often it gets limited by the vortex and force / bending moment on the top weld or screw in of the quill.

Quite often people come back a few months / years later when it's not mixing so well and find the quill has vanished!

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[0707]

IMHO the lenght of the quill inside the pipe should be equal to the ray of the inner pipe.


luis

 

[xnabrar]

thanks

 

[0707]

The injection quill we used had a spray nozzle to promote a good flow mixing of the chemical in counter current.

luis

 

[SJones]

@0707 - you wouldn't generally have a spray nozzle going counter current in a gas pipeline. A chamfered quill in a liquid line, yes. As for the quill insertion length, Google "wake frequency calculation"

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/in/drstevejones

All answers are personal opinions only and are in no way connected with any employer.

 

[0707]

Yes I agree, any way I keep on thinking a spray nozzle in the quill promotes a better mixture, of the chemical, into the fluid than just a pipe obliqualy cutted.

regards

luis

 

[bimr]

A number of firms make injection quills. The outlet is in the middle of the fluid stream with a 45^o cutoff.

Neptune

Saftflo

Your application details are not listed, but these should suffice.

 

[0707]

I had some experiences where this kind of quills had desapeared due to corrosion/erosion

luis

 

[LittleInch]

Quite often people come back a few months / years later when it's not mixing so well and find the quill has vanished!

Exactly!

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[bimr]

These quills can be fabricated from a number of different materials. If the correct material is selected for the application, the device is not going to disappear.

P = PVC
C = CPVC
H = Alloy C276
S = 316SS
A = Alloy20
T = Titanium Gr.2

 

[TiCl4]

LI,

Did you mean to quote someone else?

 

[LittleInch]

No, I was just agreeing with myself and 0707....

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[EdStainless]

With quills both erosion and fatigue (both enhanced by corrosion) are issues.
Given the option I would always select a Ni alloy (625 or C276) fro strength and corrosion resistance.
Ti is very problematic because of fatigue (low modulus=more vibration and low fatigue strength), Ti quills need to be larger diameter.
There are a lot of applications where SS will work fine, but double check that it is compatible with the product being injected.
My favorite story is about a personal care products firm making shampoo. There is an additive that is only about 0.2% in the finished product. As a concentrate it will devour 316L SS. They learned the hard way, lost the quill and then wiped out about 40' of pipe as it ran along the wall before mixing.


= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

 

[0707]

I ALSO AGREE WITH YOU EdStainless