Method and device for creating a continuous carrier gas/steam vapour flow

A technology for carrying gas and mixed airflow, which is applied in the direction of gas/steam and solid mixing, gas and gas/steam mixing, and mixing methods, etc. question

Active Publication Date: 2018-03-23
NETZSCH GERATEBAU GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Various commercially available mass flow measuring instruments are thus excluded or expensive special solutions must be selected for high medium temperatures
[0010] In the direct evaporation method, the accuracy in reaching the target concentration of the vapor is limited by the dosing accuracy of the liquid component
Often, for example, the liquid mass flow is so small that it cannot be metered with sufficient precision ("sluggish flow") and / or cannot be evaporated uniformly
Another disadvantage of direct evaporation is the comparatively long rise time and especially the fall time of the vapor concentration (usually in the range of several minutes) when the metered liquid quantity varies between zero and a target value not equal to zero.
[0011] The method of firstly creating a stream of carrier gas saturated with vapor-like components is disadvantageous because a pure vapor atmosphere (100% vapor concentration) and almost 100% concentration will not be achieved based on the necessary participation of the carrier gas

Method used

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  • Method and device for creating a continuous carrier gas/steam vapour flow
  • Method and device for creating a continuous carrier gas/steam vapour flow
  • Method and device for creating a continuous carrier gas/steam vapour flow

Examples

Experimental program
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Embodiment Construction

[0068] figure 1 The main steps of the method for generating a continuous flow of carrier gas / steam mixture are shown.

[0069] In step S1, the target concentration of the vapor-like component (steam fraction in the carrier gas / steam mixture) is defined, which can be specified, for example, directly by the user or in an automatically running "concentration program" which determines the difference between the target concentration and Time-dependent (advance via user input) curves. Preferably, in step S1 it is also possible to define the total flow rate of the carrier gas / steam mixture (e.g. mass per time unit or volume per time unit), or equivalently define the mass flow rate of the carrier gas fraction and the vapor fraction . The magnitude of the latter flow rate can likewise be predetermined, for example by means of the concentration program described.

[0070] In step S2, judge the current preset target concentration to see whether the target concentration is zero, relati...

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PUM

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Abstract

The invention relates to a method for creating a continuous carrier gas/steam vapour flow. The method comprises the step of providing a metered first carrier gas stream and wherein the portion of steam in the carrier gas/steam mixed gas stream needs to be set to zero as the carrier gas/steam mixed gas stream; providing a metered second carrier gas stream, providing a metered, vapor-saturated, carrier gas/steam mixed gas stream, mixing both to provide a first gas-like mixed gas stream, and setting the steam share in the carrier gas/steam mixed gas stream to be set Relatively low as a carrier gas/steam mixture; providing metered liquid stream and feeding it to an evaporation/mixing device to evaporate the liquid and mix with the first gas-like mixed gas stream to provide a second gas-like mixed gas stream, and the steam fraction in the carrier gas/steam mixed gas stream needs to be set relatively high as a carrier gas/steam mixed gas stream.

Description

technical field [0001] The invention relates to a method and a device for generating a continuous carrier gas / steam mixed gas flow comprising steam with adjustable proportions of (on the one hand) carrier gas and (on the other hand) liquid. Background technique [0002] Such methods and devices are known from the prior art and can be used, in particular, for the study of material properties under predetermined environmental conditions and, if necessary, variable predetermined environmental conditions. An example of this is the study of the adsorption capacity, (eg thermal) linear expansion, rigidity, crystal structure etc. of a material sample arranged in a sample chamber through which a carrier gas / steam mixture flows. [0003] The carrier gas may especially be an inert gas (eg nitrogen, helium, argon etc. or a mixture of noble gases). The vaporous component or liquid, the vapor of which is contained in the carrier gas / steam mixture, is mostly water, but mixtures including...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F3/02B01F15/04B01F15/00G01N33/00B01F23/10B01F23/30
CPCG01N33/00B01F23/12B01F23/19B01F35/2132B01F35/833B01F35/883B01F2101/23B01B1/00B01D1/0082B01D3/346B01F23/191B01F35/2211
Inventor T·登纳G·施托希A·祖博C·施密特J·汉斯T·希尔博特
Owner NETZSCH GERATEBAU GMBH
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