Device for generating flow of vapor-gas mixture having preset concentration of vapor

FIELD: instrument engineering.

SUBSTANCE: device for generating flow of vapor-gas mixture with preset concentration of vapor has vessel partially filled with fluid, second vessel provided with branch pipes for supply and removal of gas, and vapors of fluid pipeline-leak. One of vessels is connected with gas discharge forcer; fluid vapors pipeline-leak connects both vessels. Vessel, partially filled with fluid, is mounted inside second vessel. Pipeline-line, connecting both vessels, is totally placed inside second vessel. Device is also provided with additional discharge forcer for adjusting concentration of fluid vapor in second vessel. Granulated filler is introduced into vessel partially filled with fluid. Device is also provided with gas analyzer for providing gas concentration in space of second vessel.

EFFECT: higher precision of keeping of preset concentration of vapor; improved efficiency of vapor concentration control and adjustment.

 

The invention relates to metrological provision of gas analysis equipment, namely, devices for creating a flow of gas-vapor mixture with a given concentration of steam.

A device for creating a flow of gas mixture selected concentration containing vessel with volatile substance dissolved in a solvent having a boiling point above the boiling point of the volatile substances. The vessel is permeable to the volatile substances of the membrane and installed in thermally channel through which the purge gas flow. A pair of volatile substances diffuse through the membrane into the gas stream. The concentration of steam in the product gas mixture determined by chemical means or by consumption of the diluent gas and the quantity is transferred into the gas flow of the material by periodic weighing of the vessel (see autospid. The USSR 934298, CL G01N 1/00, 1980).

The disadvantages of this device are the complexity of manufacturing and the need to use high-precision and expensive equipment for weighing vessel and to control the flow of the diluent gas.

Closest to the proposed device to the technical essence is a device for creating a flow of gas-vapor mixture with a given concentration of vapor containing vessel, partially filled with liquid in the second vessel, equipped with nozzles for the supply and withdrawal of gas, one of which is connected to the booster gas flow, and the pipeline-leak vapor liquid connecting these vessels (see Drugov US; Rodin, A. gas Chromatographic analysis of the gases. In Anatolia, St. Petersburg, 2001, p.27).

A disadvantage of the known device is the need for special thermostat, which is set by the vessel partially filled with liquid. This greatly complicates the design of the device.

The objective of the invention was to develop such a device for creating a flow of gas mixture, in which the accuracy of the given concentration of steam is provided by simple technical means to regulate and control the concentration of steam.

This task is solved in that the device for creating a flow of gas-vapor mixture with a given concentration of vapor containing vessel partially filled with liquid, a second vessel equipped with a nozzle inlet and the gas outlet, one of which is connected to the booster gas flow pipeline-leak vapor liquid connecting both vessel, which according to the invention the vessel partially filled with liquid, is installed inside the second vessel, and a pipe-leak, connecting these vessels, the entire arrangement is in the second vessel.

With this arrangement, the vessel, the second vessel performs the function of thermostat relative to the vessel partially filled with liquid, and pipeline-leak vapors of the liquid. This ensures temperature stability of the vessel partially filled with liquid, the constancy of the concentration of vapor diffusing through the pipeline-leak in the second vessel, and the constancy of the concentration of steam in the second vessel without the use of additional heating and cooling devices.

Another distinctive feature of the device is that it is provided with an additional booster gas flow, designed to regulate the concentration of vapor of the liquid in the second vessel and connected with the second vessel through a pipe.

In another embodiment, the device further booster gas flow provided by the flow sensor gas, installed on its input or output.

Additional consumption booster can be connected to the second vessel via a pipe through which gas exits the pump flow rate, or through a pipe, through which the gas enters the pump flow rate. In both versions of the regulated concentration of vapor of the liquid in the volume of the second vessel.

Another distinctive feature of the device is that it introduced the filter poglotitelem, connected to the input or output additional booster gas flow.

In a preferred embodiment, the device container partially filled with liquid, provided with a nozzle for filling it with liquid, the inlet of which is located outside of the second vessel, and forming a hydraulic valve for a vessel partially filled with liquid. This allows filling of the vessel with liquid without removing from the second vessel.

Another distinctive feature of the device is that in a vessel partially filled with liquid, put the granulated filler, wetted by the liquid and having a density exceeds the density of the fluid. This prevents the Strait of fluid, for example, during transportation.

Another distinctive feature of the device is that it is equipped with a detector for controlling the concentration of vapor in the volume of the second vessel, equipped with a pump flow and connected with the second vessel by means of two nozzles. This provides an opportunity not only to regulate the concentration of vapor in the volume of the second vessel, but also to measure it.

There is also a variant of the device in which instead of the detector for controlling the concentration of vapor in the volume of the second vessel is used the temperature sensor mounted within the second vessel.

The number of differences you should note is about, the device can have multiple pipelines-netcetera vapor liquid connecting both vessel and piping-nakatali vapor-liquid directly attached to the vessel, partially filled with liquid. This provides the possibility of creating a flow of gas mixture with a higher concentration of steam.

Another distinctive feature of the device is that the inside of the second vessel can be equipped with two or more vessels partially filled with various liquids or mixtures thereof. This allows to obtain flows of multicomponent vapor-gas mixtures or gas-vapor mixtures with a given humidity.

The device may be equipped with a microprocessor unit to control parameters and control the automatic operation without operator intervention.

When using a microprocessor unit one of its inputs can be connected to the temperature sensor or with an electric output of the detector, and a control output - driven additional booster gas flow.

And, finally, the device may be a device for mixing gas mixture in the second vessel.

Thus, the technical results of the invention are to maintain the desired concentration of vapor in the vapor-gas stream, using simple technical is such funds and the ability to control and regulate the concentration of steam in the gas mixture.

The invention is illustrated by drawings.

Figure 1 shows a diagram of the simplest version of the device.

Figure 2 - diagram of the device with additional booster gas flow regulating the concentration of steam in the gas mixture.

Figure 3 is an embodiment of the device with the nozzle for introducing liquid into the vessel, partially filled with fluid.

Figure 4 is an embodiment of the device using a granular filler.

Figure 5 is an embodiment of a device with a microprocessor unit, connected to the analyzer.

Figure 6 - embodiment of the device with a microprocessor unit connected to the temperature sensor.

7 is an embodiment of a device for creating a high concentration of steam in the gas mixture.

On Fig - an embodiment of the device with additional vessel partially filled with liquid, and a fan for mixing gas mixture.

In the simplest scenario (figure 1) the device comprises a vessel 1, is partially filled with a liquid 2, which is installed inside the second vessel 3, is equipped with nozzles 4 and 5 for the supply and withdrawal of gas (air), one of which is connected to the booster 6 consumption. The vessels 1 and 3 are interconnected by pipeline-leak 7 vapor of the liquid. The second vessel 3 provided with a removable cover 8, the cat is Roy installed the pipes 4 and 5.

The device operates as follows.

Before you begin, remove the cover 8 and removed from the vessel 3 vessel 1 to complete part of its liquid. The vessel is then 1 partially filled with liquid 2, is placed within vessel 3 and seal the internal volume of the vessel 3 through the cover 8. Next include the booster 6 consumption, providing selection of the steam-air mixture from the vessel 3 through the pipe 5 and the flow of air into the vessel 3 through the pipe 4. Vapors of the liquid 2 from the inner volume of the vessel 1 is diffused by pipeline-leak 7 in the internal volume of the vessel 3. The amount of steam flow depends on temperature, length and internal diameter of the pipeline-leak 7. After some time in the internal volume of the vessel 1 is set to a dynamic equilibrium in which the amount of vapor of the liquid delivered into the internal volume of the vessel 3 of the vessel 1, is partially filled with a liquid becomes equal to the amount of vapor of the liquid, is withdrawn from vessel 3 in the flow of gas mixture through the pipe 5. Through the pipe 4 into the vessel 3 is supplied with gas (air)flow rate which is equal to the gas flow (air drawn through the pipe 5. The concentration of the vapor in the internal volume of the vessel 3 is stabilized. The vapor content of the liquid in the flow of gas mixture which is withdrawn from vessel 3 through the pipe 5, is determined by lettuces the d and the temperature of the liquid 2 in the volume of the vessel 1, and volumetric air flow. The regulation of the concentration of steam in the gas mixture located in the internal volume of the vessel 3 and in the flow of the gas mixture output by the nozzle 5, performs the booster 6 gas flow. The vessel 3 has two functions: tank vapor mixture and of thermostat relative to the vessel 1 and pipeline-leak 7. If the device is placed in a laboratory room, the temperature of the liquid 2 in the vessel 1 is maintained approximately constant. While small fluctuations of temperature and pressure, caused, for example, the inclusion of the ventilation or opening doors in the lab almost no effect on the concentration of steam in the gas mixture.

For calibration can be used as a vapor-gas mixture in the vessel 3, and the flow of the gas mixture output by the pipe 5. By the first method can be graded electrochemical and semiconductor sensors, such as electrochemical ammonia sensor. In this case, as the liquid 2 is used an aqueous solution of ammonia. Using a stream of gas-vapor mixture may be graded, for example, a photo-ionization detector and infrared detectors (detectors).

Shown in figure 2 embodiment of the device differs from the one described in figure 1 in that it includes additional consumption booster, connected to a second vessel through a pipe 10, the flow sensor 11 and the absorber filter 12. Additional booster 9 flow has an adjustable actuator 13. Figure 2 shows an embodiment of a device in which an additional booster 9 is flow connected to the vessel 3 from the gas outlet of the pump 9 gpm. It is also possible embodiment of a device in which an additional booster 9 is flow connected to the vessel 3 from the gas inlet to the booster 9 consumption. To prevent the ingress of foreign substances into the second vessel 3, the inlet pipe 4 is connected with the filter-absorber 12.

The distinctive feature of this variant of execution of the device is the use of an additional booster 9 flow for regulating the concentration of vapor within the vessel 3. When enabled, the pump 9 consumption, the concentration of steam in the vessel 3 and in the stream which is withdrawn from vessel 3 through the pipe 5, is reduced. The degree of reduction is determined by the flow rate of gas fed additional booster 9 gas flow. However, depending on the ratio of costs generated by the boosters 6 and 9 of the flow rate, the gas (air) through the pipe may be received in the second vessel 3 and to flow out of him.

This device is useful when you want to produce hail roku sensor (detector) at a constant flow rate. The flow of gas mixture that is output by the nozzle 5, remains constant, changes the gas flow introduced into the vessel 3 through the pipe 10.

An embodiment of the device shown in figure 3 differs from that described above (see Fig 1) the fact that the vessel 1 is partially filled with liquid 2, provided with a pipe 14 to fill it with fluid, the inlet of which is located outside of the second vessel 3, and forming the water seal 15 to the vessel 1, is partially filled with fluid.

The sockets 14 simplifies the procedure of filling of the vessel 1 by the liquid, since it does not require disassembly of the vessel 3 by removing the cover 8 and the extraction vessel 1, partially filled with liquid. In addition, it eliminates the ingress of fluid to the outer wall of the vessel 3. Finally, the presence of the hydraulic valve 15 is not influenced by the evaporation of liquid droplets on the inner surface of the pipe 14 to the vapor concentration in the gas mixture located in the internal volume of the vessel 1.

In the embodiment of the device represented in figure 4, the vessel 1 is partially filled with liquid, contains granular filler 16, wetted with liquid, the density of which is higher than the density of the liquid. To hold the filler 16 in the volume of the vessel and prevent it from falling into the pipe 14 at last entered the tube 17 made of a porous or hair is NISTO material, for example, glass wool.

A feature of this device is that when filled with liquid the latter is located in the space between the granulated particles. The steam flow is formed when the liquid evaporates from the surface of the particles. This prevents splashing of the fluid moving device that provides ease of operation.

Depicted in the figure 5 embodiment of the device differs from that described above (see figure 2) the fact that it is equipped with a detector 18 for controlling the water vapor content in the volume of the second vessel 3 with a built-in pump flow rate (figure 5 not shown) and connected to the vessel 3 through the pipes 19 and 20. In addition, in this embodiment, the device is equipped with a microprocessor unit 21, one of the inputs 22 of which is connected to the electrical output of the detector 18, and one of the managers of its output 23 is connected to the actuator 13 additional booster 9 gas flow.

A feature of this variant of execution of the device is that to adjust the concentration of steam in the steam-gas mixture is used, the value of the vapor concentration measured by the detector 18, discharging the gas-vapor mixture from the vessel 3 through the pipe 19 and returning it to the vessel through the pipe 20. In order not to introduce distortion in the cycle with the art, the detector must be sealed and have the detector is non-destructive type. In addition, the detector of the detector must have a fast response time. Such demands are met, for example, the photoionization detector. The output signal of detector 18 after treatment is compared in the microprocessor unit 21 with a given concentration (setpoint). If the measured value exceeds, through one of the control output 23 to the actuator 13 additional booster 9 gas flow receives the signal indicating the flow rate increases and Vice versa.

An embodiment of the device depicted in Fig.6, differs from the above in that instead of the detector 18 there's a used sensor 24 temperature, mounted within the volume of the vessel 3, for example, on the wall of the vessel 1, partially filled with liquid. In this embodiment also has a microprocessor unit 21, one of the inputs 25 which is connected to the output of the sensor 24, the temperature, the other input 26 is connected to the output of the sensor 11 of consumption, and one control output 23 is connected to the actuator 13 additional booster 9 gas flow.

In this embodiment, the detector also provides the ability to control and regulate water vapor content in the gas mixture.

When working version of the device previously removed experimental dependence of the concentration of steam in the output stream of the gas mixture flow rate GA is a, selected through an additional booster 9 gas flow rate for different values of temperature. These dependencies are recorded in the memory of the microprocessor unit 21. Each temperature value corresponds to a certain value of the flow rate. The flow control is performed on the basis of the readings of the flow sensor 11, the signal of which its output is input to microprocessor 26 of the block.

An embodiment of the device depicted in Fig.7, differs from those described above (see figure 1) the fact that it contains several pipelines-netcetera 7 vapor of the liquid, and all piping-nakatali vapor-liquid directly attached to the vessel 3, is partially filled with fluid.

A feature of this variant of the device is that the diffusion of vapor fluid from the internal volume of the vessel 1, is partially filled with liquid in the inner volume of the vessel 3 is carried out immediately after a few pipelines-netcetera 7, which increases the concentration of vapor of the liquid in the inner volume of the vessel 3. Changing the number of pipelines-netcetera, it is possible to vary the maximum vapor concentration that can be achieved in the vessel 3 for each value of flow rate of gas mixture which is withdrawn from vessel 3.

An embodiment of the device, which has an additional receptacle, partially what about the fluid-filled, and a device 28 for mixing vapor-gas mixture in the volume of the second vessel is shown in Fig. In this embodiment, the device can create two-, and if more than one additional vessel and multicomponent mixtures. When completing the vessel 27 water can be used to create a gas mixture with different humidity. The fixture 28 for mixing gas mixture, for example a fan, powered by the power source 29, allows to obtain a homogeneous gas-vapor mixture.

1. Device for creating a flow of gas-vapor mixture with a given concentration of vapor containing vessel partially filled with liquid, a second vessel equipped with a nozzle inlet and the gas outlet, one of which is connected to the booster gas flow pipeline-leak vapor liquid connecting both of the vessel, wherein the vessel is partially filled with liquid, is installed inside the second vessel, and a pipe-leak, connecting these vessels, entirely located within the second vessel.

2. The device according to claim 1, characterized in that it is provided with an additional consumption booster designed to regulate the concentration of vapor of the liquid in the second vessel and connected with the second vessel through a pipe.

3. The device according to claim 2, characterized in that the additional the initial booster gas flow provided by the flow sensor gas set on its input or output.

4. The device according to claim 2 or 3, characterized in that the additional consumption booster is connected with the second vessel to an input or output while pumping gas.

5. The device according to claim 4, characterized in that it introduced filter-absorber vapor connected to the input or output additional booster gas flow.

6. The device according to claim 1, characterized in that the vessel partially filled with liquid, provided with a nozzle for filling it with liquid, the inlet of which is located outside of the second vessel, and forming a hydraulic valve for a vessel partially filled with liquid.

7. The device according to claim 3, characterized in that the vessel partially filled with liquid, put the granulated filler, wetted by the liquid and having a density greater than the density of the liquid.

8. The device according to claim 1, characterized in that it is provided with an additional detector for controlling the concentration of vapor in the volume of the second vessel, which is equipped with a pump flow and is connected with the second vessel by means of two pipes.

9. The device according to claim 1, characterized in that it is equipped with a temperature sensor installed inside the second vessel.

10. The device according to claim 1 or 2, or 3, or 7, characterized in that it has several pipelines-netcetera, soy is Inaudi both vessel, all pipelines-nakatali vapor-liquid directly attached to the vessel, partially filled with fluid.

11. The device according to claim 1 or 2, or 3, or 7, characterized in that the inside of the second vessel equipped with one or more additional vessels partially filled with various liquids or mixtures thereof.

12. The device according to claim 1 or 2, or 6, or 7, or 8, or 9, characterized in that it is provided with a microprocessor unit, one input of which is connected to the electrical input of the detector or temperature sensor, and one of the control outputs of the microprocessor unit is connected to drive additional consumption booster.

13. The device according to claim 1 or 2, or 3, or 7, characterized in that the second vessel is equipped with a device for mixing gas mixture in the second vessel.



 

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