【Daily Question】12.15 Term Explanation: Single-stage vaporization
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This post was last edited by Catalyzing a Grain on 2016-1-4 at 11:41. Definition: In the process of heating and vaporizing a liquid mixture, the steam formed remains in contact with the liquid; separation between steam and liquid occurs only after the necessary heating temperature is reached. This type of vaporization process is called single-stage vaporization. Participation = +2 wealth; Correct answers = +5 wealth; In-depth discussions = +8 wealth. Participating in the activity “My Most Crazy Moment” = +20 wealth. [Petrochemical event] Registration for the “My Most Crazy Moment” event: http://bbs.hcbbs.com/thread-1487895-1-1.html (Source: Haichuan Chemical Industry Forum)
Single vaporization: When a liquid mixture is heated and partially vaporized, the gas and liquid phases remain in close contact. Only when a certain degree is reached do the two phases separate at once; this separation process is known as equilibrium vaporization, or single vaporization.
Single vaporization is also known as equilibrium vaporization. When a liquid mixture is heated and partially vaporized, the gas and liquid phases remain in close contact with each other; it is only when a certain degree is reached that the two phases separate at once, and this separation process is referred to as single vaporization.
Single vaporization: When a liquid mixture is heated and partially vaporized, the gas and liquid phases remain in close contact with each other; only when a certain degree is reached do the two phases separate at once, and this separation process is known as single vaporization.
Single vaporization: In industrial production, the evaporation of liquid mixtures (the transformation from liquid to gas) can, in principle, be achieved in two different ways. One method involves continuously separating the steam that is generated from the material inside the distillation vessel at all times; the other method does not remove the steam immediately, but rather keeps the steam in close contact with the liquid until a specified temperature is reached and equilibrium between the gas and liquid phases is established, after which the steam is removed all at once. This method is also known in industry as equilibrium distillation, or single vaporization. For example, the distillation that takes place in the refining vessels used in benzene purification is a form of gradual distillation, whereas the rapid evaporation of tar in a tubular furnace followed by gas-liquid separation is an example of single vaporization. In an evaporator, the temperature at which equilibrium is finally achieved between the gas phase and the liquid phase as a result of single vaporization is called the single vaporization temperature. Throughout the entire process of distilling tar using a tubular furnace for continuous distillation, it is necessary for all fractions of diphenyl tar to be vaporized in a single step within a two-stage evaporator. To ensure that both the yield of the fractions (over 40%) and the quality of the asphalt meet the required standards, it is important to determine the single vaporization temperature appropriately. The most suitable single vaporization temperature is one that allows for the maximum amount of phenol and naphthalene to be vaporized from the tar, while producing asphalt with a softening point of 80–90°C, and with as low a content of naphthalene and phenols as possible. Generally, the single vaporization temperature ranges from 380 to 390°C.
After the liquid mixture is heated and partially vaporized, the gas and liquid phases remain in close contact. Only when a certain degree is reached do the two phases separate at once; this separation process is known as equilibrium vaporization, or single-stage vaporization.
After the liquid mixture is heated and partially vaporized, the gas and liquid phases remain in close contact. Only when a certain degree is reached do the two phases separate at once; this separation process is known as equilibrium vaporization, or single-stage vaporization.
When a liquid mixture is heated, the vapor generated remains in close contact with the liquid. At a certain temperature, the gas and liquid phases separate at once; this separation process is known as vaporization.
Single vaporization: When a liquid mixture is heated, the steam generated and the liquid remain in close contact with each other; once the temperature reaches a certain level, the vapor and liquid phases separate at once, and this separation process is known as single vaporization (also referred to as equilibrium evaporation).
After the liquid mixture is heated and partially vaporized, the gas and liquid phases remain in close contact with each other; only when a certain degree is reached do the two phases separate at once. This separation process is known as equilibrium vaporization, or single-stage vaporization
After the liquid mixture is heated and partially vaporized, the gas and liquid phases remain in close contact. Only when a certain degree is reached do the two phases separate at once; this separation process is known as equilibrium vaporization, or single-stage vaporization.