Can I Create a Vacuum with One Inlet and Two Outlets?

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Discussion Overview

The discussion revolves around the feasibility of creating a vacuum in a chamber with one inlet and two outlets, specifically in the context of a spray dryer used for drying particles. Participants explore the mechanics of maintaining low pressure while allowing for the introduction of a reactant and the removal of products.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant questions the possibility of maintaining a vacuum with one inlet and two outlets, seeking clarification on the type of reaction involved.
  • Another participant suggests that it could be possible with the right pumping mechanisms, indicating the need for one pump for circulation and another for differential pumping.
  • A participant clarifies that the chamber in question is a spray dryer, detailing the process of atomizing a mixture and using dry air to remove water.
  • Concerns are raised about the need for special devices in the inlet and outlet pipes due to pressure differences between the chamber and the atmosphere.
  • One participant asserts that it is indeed possible to control the pressure in the chamber, comparing it to vacuum filtration, while noting that the inlet pressure will increase to balance the chamber's low pressure.

Areas of Agreement / Disagreement

The discussion contains multiple viewpoints regarding the feasibility of the proposed setup. While some participants express confidence in the possibility, others raise concerns about the practical challenges involved, indicating that no consensus has been reached.

Contextual Notes

Participants mention the need for specific devices and mechanisms to manage pressure differences, but the discussion does not resolve the technical requirements or assumptions necessary for implementation.

Davidrdguez
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Hello, I'd like to propose you one question.

I tried to use my logic but it doesn't work.

I have a chamber and i make the vacuum in the interior of it. I have one inlet pipe and two outlet pipes, there is one substance that is coming in, the reaction inside the chamber and the two exits for the two products that they were produced in the reaction.

I'd like to know if this is possible. I mean, I want the less possible pressure in the interior, and can I do this? put one substance into and out normally?

Thank you very much
 

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What kind of reaction are you referring to? Since you only have one inlet you are presumably not talking about a reaction resulting from "mixing" two gases.

Otherwise, I can't see why it wouldn't be possible. You need one pump for circulating the gases and another for the differential pumping of the chamber.
 
Spray dryer

Hi,

Actually the chamber I speak about it's a drying chamber of a spray dryer. It's a device to dry particles. There are one mix of product and water, we atomize it in small droplets (always inside the room) and with dry air (I forgot one another inlet pipe, the air to dry) we put the water off the mix. That's what happens inside the chamber.

I doubt because I need special devices in the inlet and outlet pipes and as I have the lower pressure inside the chamber and atmospheric pressure in the pipes I don't know if it is possible.

Thanks
 
Yes it's possible. You have your reactant going in, and pressure in the chamber can be controlled via the outlet in a manner similar to vacuum filtration.

The only thing is that pressure of the inlet will increase to attempt to balance out the low pressure in the chamber.
 
Ok, i understand.

Thank you, you have helped me very much.
 

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