Steam Water Cyclone Separator

Your first difficulty is a complete lack of knowledge of the subject at hand.

Go to the internet and search for "steam water cyclone separator design guides".

If someone gives you all the answers, you still won't have the ability to design the next one, should such an ocassion ever arise.

Here's one:separator vessel selection and sizing (engineering design guideline)

Lyn you disappoint me it was asked for "cyclone" separators and you give a Lyn(k) for separators which are not specially cyclones!

Principle: the gas flow is obliged to follow a circular path the liquid drops follow same path and are projected to the wall with a force depending of trajectory radius and tangential velocity ^2. This is valid as well for cylindrical as for conical cyclones. For the conical design due to progressive radius reduction speed grows and the active force as well. You should consider that the drop moves in a radial direction relative to gas/vapor so that a friction force appears which will reduce the acceleration direction wall. A cylindrical cyclone is less efficient with respect to minimal drop diameter separated and requires longer tubes. A conical can separate smaller drops and is shorter.

The very problem is the drop density with respect to the vapor density and the friction between drop and vapor. If the drop is considered as a sphere the coefficient varies according to Reynolds the computation being quite difficult to make. The length has to be such that the smallest drop starting at inner diameter will be brought to the wall.

This explanation is very compact and I would recommend a more detailed reading of papers especially in the direction of cyclones similitude and optimal design since not only above criteria have to be respected but also the pressure drop for energy economy.

Having designed steam separators for the production of dry steam. Define your requirements/parameters.which is quite simple....

First, How many pounds/hour of steam do your require?

Do your require culinary steam?

Cylindrical: ||
Conical: \/
Comical: /\

With respect to flow direction ↓ the conical \/ is the solution. The scope of the conical form is to increase progressively the vapor/gas flow rpm with respect to axis.

Most designs have a short ll entry portion where the tangential flow entry is placed and continue with the \/ section.

The profile is in fact \ l l / the cylindrical part used for vapor return to top. This generates as well a "circular" path and let drops go to the bottom/wall.

This is all right agree with your suggestion but my question is as follow

For steam water which of the following case is better

1) steam water separation if we make upper part conical and lower part cylindrical with tangential inlet at upper conical section then what happen?

2) upper part cylinder and lower is conical with tangential inlet at upper part.

3) What is perpose of Guide ring where it use at bottom or upper part, what happen when we not use guide ring? They are fix or moving

4) In lots of paper i see they used only cylindrical part without any conical part for gas liquid separation they said, there is no need of conical section for gas liquid separation is it better?

please anyone answer all the above question.

Steam Water Cyclone Separator

This is all right agree with your suggestion but my question is as follow

For steam water which of the following case is better

1) steam water separation if we make upper part conical and lower part cylindrical with tangential inlet at upper conical section then what happen?

2) upper part cylinder and lower is conical with tangential inlet at upper part.

3) What is perpose of Guide ring where it use at bottom or upper part, what happen when we not use guide ring? They are fix or moving

4) In lots of paper i see they used only cylindrical part without any conical part for gas liquid separation they said, there is no need of conical section for gas liquid separation is it better?

please anyone answer all the above question.

Steam Water Cyclone Separator

This is all right agree with your suggestion but my question is as follow

For steam water which of the following case is better

1) steam water separation if we make upper part conical and lower part cylindrical with tangential inlet at upper conical section then what happen?

2) upper part cylinder and lower is conical with tangential inlet at upper part.

3) What is perpose of Guide ring where it use at bottom or upper part, what happen when we not use guide ring? They are fix or moving

4) In lots of paper i see they used only cylindrical part without any conical part for gas liquid separation they said, there is no need of conical section for gas liquid separation is it better?

please anyone answer all the above question

It depends on the minimal drop dimension you want to separate. In fact water being relatively heavy separation is easier than for other materials this could explain the only cylindrical design since a conical design has as scope to increase separation power with a shorter device.

The guide ring has as scope to give a true tangential flow direction at entry since flows choose the minimal resistance path and could take higher angles thus reducing the number of turns and power separation for same length.

In steam water cyclone separator having conical section upward and cylindrical portion at liquid out side i.e at below. For this two phase mixture how to calculate the pressure drop please mention a formulae, also loss coefficient, two phase multiplier, void fraction for this type of cyclone separator.

4 ways:

- you look in books about cyclones an use given data of equations

- you look in data sheets and make a similitude

- you build a model , measure and make a similitude

- you use CFD soft packs

Since water drops are carried by steam I would not consider a 2 phases mixture.

May I make the remark that all what you mention is STRONGLY depending on your geometry so that a general formula can only give a very rough and unprecise estimation.

Respected sir,

I read the fifth chapter of boiling heat transfer, two phase flow and circulation of steam/its generation and used published by Babcock and Wilcox 41 edition.I am working on steam water separator. In this chapter formula for pressure drop across separator is given but factor kss is not given but only said that it is function of pressure for each separator design. How we calculate this factor? what happen when we used only cylindrical part without using conical upper section? What are the purpose of base plate with swirl vanes, if we not used it then what happen?

Also, if we know steam generation and pressure how we finalize the dimension of steam water cyclone separator there is any formless for this.Also how to calculate maximum steam carrying capacity of each cyclone?

please give me some guidelines for designing of steam water cyclone separator If there is any other book, research paper or literature regarding this that give me idea for design please mention names for same.

I hope your positive response.

Thanking you