Functions and design requirements of a carburetor
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Many instruments use gases, and some of these gases are stored in Dewar flasks as liquid gases; to convert the liquid form into a gas, a vaporizer is required； Questions: 1. What is the function of a carburetor? Why can’t a Dewar flask be connected directly to a gas pipeline? 2. To design a nitrogen supply system with a flow rate of 100 Nm3/h, what specifications are required for the vaporizer?
I’m not familiar with your industry, but in the process of synthesizing polyethylene from ethylene, we installed a steam vaporizer for the pre-treatment of the sample before analysis using chromatography. The reason for this is that the process fluid contains many olefinic compounds, including C5 and C6 components, which are in liquid state at room temperature. However, when using a chromatograph to detect a total of 12 different components, both gaseous and liquid ones, it’s necessary to use a steam vaporizer to heat these C5 and C6 components to around 90 degrees Celsius so that they can be vaporized and then analyzed by the chromatograph. I hope this helps you
Knowing the function and principle of a Dewar flask, one understands that it cannot be connected directly to pipelines. I don’t know much about carburetors.
Hehe, this question is similar to one I asked before. If liquefied gas contains methanol, to obtain accurate results it is necessary to take a sample in its liquid state, allow it to enter the vaporization chamber where it vaporizes, and then pass the vapor through a chromatography column for separation. Sampling using traditional gas cylinders or aluminum foil bags will not yield representative results. Of course, if it can be confirmed that the liquefied gas does not contain methanol or significant amounts of components with more than 5 carbon atoms, then taking a sample from the pipeline in liquid form, allowing it to vaporize in a gas bag, will still give satisfactory results
Reply to 2# lovegxc: You mentioned online chromatography – that’s indeed a real industrial analysis instrument. It seems like you’re involved in the field of process analytical chemistry, which involves interdisciplinary approaches and interactions. You’re at the pinnacle of our profession; I’m jealous! A company that has access to online chromatography must be quite powerful, or else it must be part of a state-owned research institute, haha!
Reply to 6# chenhaidong5758: Brother, it’s not that exaggerated at all. As long as a company has the funds, it can afford online chromatography and infrared analyzers; those with more resources even have online mass spectrometers. All companies in the coal chemical industry use online analysis equipment these days – it’s not as extreme as you think
The main function of a carburetor is to vaporize a liquid into a gas for easier use. If a Dewar flask is connected directly to the gas pipeline, the medium that comes out of the flask is not necessarily what you need. Regarding the specifications of the vaporizer required for 100 cubic feet per hour of nitrogen, it depends on what the pressure is, as well as on which type you prefer to use. There are many types of vaporizers, such as those that use air temperature or those that use a water bath. Water bath types are further divided into electric heating, steam heating, and several other forms
Reply to 8# liang2182003: Only if you understand the meaning of the question I mentioned can I thank you. I can’t find any relevant information, so I hope you can help me out.