CN215953498U - Sulphide diluting device - Google Patents
Sulphide diluting device Download PDFInfo
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- CN215953498U CN215953498U CN202121803565.5U CN202121803565U CN215953498U CN 215953498 U CN215953498 U CN 215953498U CN 202121803565 U CN202121803565 U CN 202121803565U CN 215953498 U CN215953498 U CN 215953498U
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Abstract
The utility model discloses a sulfide diluting device which comprises a diluter, a sample mass flow controller and a dilution gas mass flow controller, wherein the diluter is provided with a sample inlet, a dilution gas inlet and a mixed gas outlet, a gas outlet pipe joint of the sample mass flow controller is communicated with the sample inlet, a gas outlet pipe joint of the dilution gas mass flow controller is communicated with the dilution gas inlet, a gas inlet pipe joint and a gas outlet pipe joint of the sample mass flow controller are both inner passivation joints, and a flow divider channel, a gas inlet side channel and a gas outlet side channel of the sample mass flow controller are all inner passivation channels. This sulphide diluting device is through the inside passivation that carries on of air inlet pipe connector, air outlet pipe connector, side passageway, the side passageway of giving vent to anger and shunt passageway to sample mass flow controller, has reduced the residual amount of absorption in the dead volume by a wide margin to make the device be applicable to the high accuracy dilution of multiple sulphide, so that carry out accurate measurement through chromatographic analysis.
Description
Technical Field
The utility model relates to the technical field of sulfide detection, in particular to a sulfide diluting device.
Background
The dynamic dilution instrument is mainly used for quantitative dilution and gas distribution of environmental air, emergency monitoring, indoor environmental gas samples and gas in organic and inorganic poison analysis in operation places and automatic sample introduction of the samples, and is used as a pretreatment device of a gas chromatography and chromaticness combined system.
When the existing sulfide diluting device for chromatographic analysis is used, due to the fact that different sulfides (including hydrogen sulfide, carbonyl sulfide, methyl mercaptan, ethanethiol, methyl sulfide, ethyl sulfide, dimethyl sulfide and the like) are different in adsorption property, part of sulfides are easily adsorbed in water vapor, and part of sulfides are easily adsorbed in dead volume to form residues, subsequent dilution precision and chromatographic analysis detection results are affected, and the existing sulfide diluting device is difficult to realize high-precision dilution of different sulfides.
Therefore, there is a need for an improvement of the sulfide dilution unit of the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide a sulfide diluting device suitable for high-precision dilution of different samples.
In order to realize the technical effects, the technical scheme of the utility model is as follows: the utility model provides a sulphide diluting device, includes diluter, sample mass flow controller and dilution gas mass flow controller, be provided with sample import, dilution gas import and gas mixture export on the diluter, sample mass flow controller's outlet duct connect with sample import intercommunication, dilution gas mass flow controller's outlet duct connect with dilution gas import intercommunication, sample mass flow controller's intake pipe joint, outlet duct connect and are interior passivation joint, sample mass flow controller's shunt passageway, admit air side passageway and the side passageway of giving vent to anger are interior passivation passageway.
Preferably, in order to absorb water vapor in the sample to reduce the adsorption of sulfides and remove large particle impurities, and ensure the stable operation of the sample mass flow controller, the air inlet pipe joint of the sample mass flow controller is provided with a filter.
Preferably, the gas inlet pipe joint and the gas outlet pipe joint of the sample mass flow controller are connected through a purge valve in order to remove residues in the sample mass flow controller.
Preferably, in order to ensure the dilution effect of the sample, the ratio of the full scale of the sample mass flow controller to the full scale of the dilution gas mass flow controller is (1-20): 1000.
preferably, in order to accurately control the amount of the sample introduced into the diluter, a three-way valve is arranged between the sample mass flow controller and the diluter, the three-way valve is provided with a gas inlet, a first gas outlet and a second gas outlet, the gas inlet is communicated with a gas outlet pipe joint of the sample mass flow controller, the first gas outlet is communicated with the diluting gas inlet, and the second gas outlet is communicated with the outside.
Preferably, in order to automatically control the amount of the sample introduced into the diluter, the three-way valve is a two-position three-way electromagnetic valve.
Preferably, the mixture outlet is provided with a flow meter in order to detect a flow rate of the mixture gas discharged from the mixture outlet.
Preferably, in order to accurately control the flow of the discharged mixed gas, the device further comprises a balance valve, and two ends of the balance valve are respectively communicated with the mixed gas outlet and the outside.
Preferably, in order to control whether the device is filled with the dilution gas and the sample, the gas inlet of the dilution gas mass flow controller is provided with a dilution switch valve, and the gas inlet of the sample mass flow controller is provided with a sample switch valve.
Preferably, in order to reduce the dilution cost, the dilution gas mass flow controller is a nitrogen mass flow controller or a helium mass flow controller.
In conclusion, the sulfide diluting device disclosed by the utility model has the advantages that the interiors of the air inlet pipe joint, the air outlet pipe joint, the air inlet side channel, the air outlet side channel and the splitter channel of the sample mass flow controller are passivated, so that the residual quantity absorbed in dead volume is greatly reduced, and the device is suitable for high-precision dilution of various sulfides so as to carry out accurate measurement through chromatographic analysis.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of embodiment 2 of the present invention;
FIG. 3 is a schematic structural view of embodiment 3 of the present invention;
in the figure: 1. diluter, 2 sample mass flow controller, 3 dilution gas mass flow controller, 4 filter, 5 purge valve, 6 three-way valve, 7 flow meter, 8 balance valve, 9 dilution switch valve, 10 sample switch valve, 11 sample source, 12 dilution gas source, 13 vent, 14 dilution sample outlet.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
As shown in fig. 1, the sulfide diluting device according to embodiment 1 includes a diluter 1, a sample mass flow controller 2, and a diluent gas mass flow controller 3, the diluter 1 is provided with a sample inlet, a diluent gas inlet, and a mixture gas outlet, the mixture gas outlet is connected to a diluted sample outlet 14, an outlet pipe joint of the sample mass flow controller 2 is communicated with the sample inlet, the inlet pipe joint is connected to a sample source 11, the inlet pipe joint and the outlet pipe joint of the sample mass flow controller 2 are both inner passivation joints, and a splitter channel, an inlet side channel, and an outlet side channel of the sample mass flow controller 2 are all inner passivation channels; the gas inlet pipe joint of the dilution gas mass flow controller 3 is connected with a dilution gas source 12, and the diluter 1 is a dilution pipe.
When the sulfide diluting device of the embodiment is used, a sulfide gas sample is provided by a sample source 11, the flow of the passing sample is accurately controlled by a sample mass flow controller 3, and then the sample enters a diluter 1 through a sample inlet; meanwhile, the diluent gas source 12 provides diluent gas, the diluent gas flow of the through hole is accurately controlled by the diluent gas mass flow controller 3, then the diluent gas enters the diluent gas 1 through the diluent gas inlet and is mixed with the sample gas entering the diluter 1 at the same time to obtain mixed gas, namely diluted sample gas, the mixed gas flows to the diluted sample outlet 14 through the mixed gas outlet, and the diluted sample outlet 14 is used for being connected with a chromatographic analyzer and used for detecting the concentration of sulfide in the diluted sample gas, so that the parameters such as the concentration and the content of the sulfide in the sample before dilution are obtained.
Because in this embodiment, the inlet tube joint of 3 both sides of sample mass flow controller, the outlet duct connects, inside shunt passageway has all carried out inside passivation treatment, and the passageway of 3 inlet sides of sample mass flow controller and play gas side also carries out inside passivation treatment, thereby prevent the gaseous in-process of sample, inside sulphide is adsorbed in the joint or inside shunt passageway of passageway or 3 both sides of sample mass flow controller, the residue in the dead volume that has significantly reduced promptly, thereby can realize the accurate dilution to the sample gas, and make the device be applicable to the dilution of multiple gas, be favorable to the accurate measurement of follow-up chromatographic analyzer.
Be provided with filter 4 between sample mass flow controller 2's the admission pipe connector and the sample source 11, be provided with the charcoal net in the filter 4, can filter the large-scale particulate matter in the sample gas through filter 4, guarantee sample mass flow controller 2's steady operation to can also get rid of the moisture in the sample gas, prevent that the sulphide from remaining in vapor, influence dilution effect.
The full scale of the sample mass flow controller 2 is 20mL, the full scale of the dilution gas mass flow controller 3 is 1L, and the sample mass flow controller 2 and the dilution gas mass flow controller 3 both adopt American ALICAT series low pressure drop mass flow meters. The gas mass flowmeter adopts an internal compensation laminar flow pressure difference technology, so that gas still keeps laminar flow movement in a large flow range. The built-in absolute pressure and temperature sensor fully compensates the difference between the volume flow and the mass flow caused by the pressure and the temperature, corrects the standard working condition of a user, can be used for quickly and accurately measuring the mass flow, the volume flow, the pressure and the temperature of process gas, and is suitable for various flow measurement and control occasions, particularly application occasions requiring low pressure loss. By limiting the full scale of the sample mass flow controller 2 and the full scale of the dilution gas mass flow controller 3, the dilution effect on the sample gas is ensured.
A three-way valve 6 is arranged between the sample mass flow controller 2 and the diluter 1, the three-way valve 6 is provided with an air inlet, a first air outlet and a second air outlet, the air inlet is communicated with an air outlet pipe joint of the sample mass flow controller 2, the first air outlet is communicated with a dilution air inlet, the second air outlet is communicated with a vent 13, the vent 13 is communicated with the outside, and the three-way valve 6 is a two-position three-way electromagnetic valve. With the above design, the sample gas introduced into the diluter 1 can be further accurately controlled by using the three-way valve 6 in cooperation with the sample mass flow controller 2. In the initial stage of equipment use, the sulfide-containing sample gas flows out of the gas outlet pipe joint of the mass flow controller 2 and then enters the diluter 1 through the gas inlet and the first gas outlet of the three-way valve 6 in sequence; along with the increase of the service time, when the introduced sample gas is too much, the three-way valve 6 performs corresponding actions, so that the sample gas entering the three-way valve 6 flows to the vent 13 from the second gas outlet and is finally discharged to the atmosphere, and thus, the accurate control of the flow of the sample gas is realized.
A flow meter 7 is arranged between the mixed gas outlet and the diluted sample outlet 14. By the flow meter 7, the flow rate of the mixed gas flowing into the diluted sample outlet 14 (i.e., the diluted sample gas) can be accurately measured.
The diluent gas mass flow controller 3 is a nitrogen gas mass flow controller, that is, the diluent gas provided by the diluent gas mass flow controller 3 is nitrogen gas, and since the nitrogen gas has low manufacturing cost and stable chemical property, the diluent gas is selected from nitrogen gas, so that the diluent cost can be reduced. Of course, helium may be used as the diluent gas, as an alternative to similar effects.
A dilution on-off valve 9 is provided between the inlet connection of the dilution gas 3 mass flow controller and a dilution gas source 12, and a sample on-off valve 10 is provided between the filter 4 and a sample source 11. By opening the dilution on-off valve 9 and the sample on-off valve 10, the sample source 11 and the dilution gas source 12 are facilitated to be introduced with the sample and the dilution gas, respectively, and by closing the dilution on-off valve 9 and the sample on-off valve 10, gas can be prevented from entering the sample mass flow controller 2 and the dilution gas mass flow controller 3, so that the apparatus can be shut down.
Example 2
As shown in fig. 2, the sulfide diluting device of embodiment 2 is different from that of embodiment 1 in that it further includes a balance valve 8, and both ends of the balance valve 8 are respectively communicated with a mixed gas outlet and a vent 13.
When the mixture gas discharged from the mixture gas outlet is excessive, the balance valve 8 may be opened so that the excessive mixture gas is discharged to the outside to ensure that the diluted sample gas enters the diluted sample gas in the diluted sample outlet 14 in a quantitative amount, thereby performing accurate measurement.
Example 3
As shown in fig. 3, the sulfide diluting device of example 3 is different from that of example 2 in that a purge valve 5 is connected between the inlet pipe joint and the outlet pipe joint of the sample mass flow controller 2.
After the equipment operation finishes, start purge valve 5, can clean the inside of sample mass flow controller 2, get rid of the residue in sample mass flow controller 2 to when guaranteeing the follow-up use of equipment, to the accurate dilution that contains sulphide gas, improve the dilution precision, and then guarantee chromatography's detection precision.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a sulphide diluting device, includes diluter (1), sample mass flow controller (2) and dilution gas mass flow controller (3), be provided with sample import, dilution gas import and gas mixture export on diluter (1), the outlet duct of sample mass flow controller (2) connect with the sample import intercommunication, the outlet duct of dilution gas mass flow controller (3) connect with the dilution gas import intercommunication, its characterized in that:
the air inlet pipe joint and the air outlet pipe joint of the sample mass flow controller (2) are both inner passivation joints, and the flow divider channel, the air inlet side channel and the air outlet side channel of the sample mass flow controller (2) are both inner passivation channels.
2. The sulfide dilution apparatus of claim 1, wherein: and the air inlet pipe joint of the sample mass flow controller (2) is provided with a filter (4).
3. The sulfide dilution apparatus of claim 1, wherein: and the air inlet pipe joint and the air outlet pipe joint of the sample mass flow controller (2) are connected through a purge valve (5).
4. The sulfide dilution apparatus of claim 1, wherein: the ratio of the full scale of the sample mass flow controller (2) to the full scale of the dilution gas mass flow controller (3) is (1-20): 1000.
5. the sulfide dilution apparatus of claim 1, wherein: sample mass flow controller (2) with be provided with three-way valve (6) between diluter (1), three-way valve (6) have air inlet, first gas outlet and second gas outlet, the air inlet with the outlet duct joint intercommunication of sample mass flow controller (2), first gas outlet with dilution gas import intercommunication, the second gas outlet communicates with the external world.
6. The sulfide dilution apparatus of claim 5, wherein: the three-way valve (6) is a two-position three-way electromagnetic valve.
7. The sulfide dilution apparatus of claim 1, wherein: and the mixed gas outlet is provided with a flowmeter (7).
8. The sulfide dilution apparatus of claim 7, wherein: the device also comprises a balance valve (8), wherein the two ends of the balance valve (8) are respectively communicated with the mixed gas outlet and the outside.
9. The sulfide dilution apparatus of claim 1, wherein: the air inlet of the dilution gas mass flow controller (3) is provided with a dilution switch valve (9), and the air inlet of the sample mass flow controller (2) is provided with a sample switch valve (10).
10. The sulfide dilution apparatus of claim 1, wherein: the diluent gas mass flow controller (3) is a nitrogen gas mass flow controller or a helium gas mass flow controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121803565.5U CN215953498U (en) | 2021-08-04 | 2021-08-04 | Sulphide diluting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121803565.5U CN215953498U (en) | 2021-08-04 | 2021-08-04 | Sulphide diluting device |
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| Publication Number | Publication Date |
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| CN215953498U true CN215953498U (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121803565.5U Active CN215953498U (en) | 2021-08-04 | 2021-08-04 | Sulphide diluting device |
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| CN (1) | CN215953498U (en) |
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2021
- 2021-08-04 CN CN202121803565.5U patent/CN215953498U/en active Active
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