CN203405363U - Measuring system for micro oxygen content in ammonia gas - Google Patents
Measuring system for micro oxygen content in ammonia gas Download PDFInfo
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- CN203405363U CN203405363U CN201320460576.7U CN201320460576U CN203405363U CN 203405363 U CN203405363 U CN 203405363U CN 201320460576 U CN201320460576 U CN 201320460576U CN 203405363 U CN203405363 U CN 203405363U
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Abstract
The utility model discloses a measuring system for the micro oxygen content in ammonia gas. The system comprises a reducing valve and a micro oxygen analyzer, and further comprises a washing bottle, a gas-water separator, a drying bottle, a first connecting pipeline, a nitrogen replacing pipeline, a second connecting pipeline, a third connecting pipeline and a fourth connecting pipeline, wherein one end of the first connecting pipeline is connected with the reducing valve while the other end of the first connecting pipeline is inserted into desalted water, and the first connecting pipeline is provided with a first flow meter; the nitrogen replacing pipeline is inserted into the washing bottle and is located above the liquid level of the desalted water, and the nitrogen replacing pipeline is provided with a second flowmeter; one end of the second connecting pipeline is located above the liquid level of the desalted water while the other end of the second connecting pipeline is connected with the gas-water separator; one end of the third connecting pipeline is connected with the gas-water separator while the other end of the third connecting pipeline is connected with the lower end of the drying bottle; one end of the fourth connecting pipeline is connected with the upper end of the drying bottle while the other end of the fourth connecting pipeline is connected with the micro oxygen analyzer. With the adoption of the measuring system for the micro oxygen content the in ammonia gas, disclosed by the utility model, the measuring precision of the micro oxygen content can be ensured.
Description
Technical field
The utility model relates to the measuring system of micro-oxygen content in field of metallurgy, relates in particular to the mensuration system of micro-oxygen content in a kind of ammonia.
Background technology
In the nitridation process of orientation silicon steel, nitriding atmosphere is generally comprised of hydrogen, nitrogen, ammonia, and this is content and the purity of ammonia wherein, very large on the impact of final nitriding effect, in order to guarantee nitriding effect, just must have high-precision mensuration to ammonia purity.
At present, the mensuration of micro-oxygen content in ammonia is undertaken by trace oxygen analyzer, as shown in Figure 1, in existing ammonia, the mensuration system of micro-oxygen content comprises reduction valve 1, trace oxygen analyzer 2, sample gas is reduced pressure by reduction valve 1, make its pressure meet the pressure permissible range of trace oxygen analyzer, then pass into trace oxygen analyzer 2 and measure.Wherein, the trace oxygen analyzer using is the equipment that market can be sold, generally there are two kinds of fuel cell method trace oxygen analyzer and Kind of Analyser of Minute Quantity Oxygen Based on Zirconia Cells, its principle of work is all to utilize after solution in oxygen and analyser, sensor response, measure potential change, thereby obtain the numerical value of oxygen content.
But there is following defect in the mensuration system of this kind of structure:
1, ammonia is to adopt liquefied ammonia purifying distil process to obtain, so can contain a small amount of moisture in ammonia, can pollute the lambda sensor of trace oxygen analyzer, affects the Measurement sensibility of system, is difficult to guarantee measuring accuracy.
2, ammonia is a kind of corrosive gas, if directly passed into trace oxygen analyzer, can cause the component corrosion such as instrument internal lambda sensor to damage, and reduces the serviceable life of trace oxygen analyzer.
Utility model content
For addressing the above problem, the utility model provides the mensuration system of micro-oxygen content in a kind of ammonia, and it can improve the accuracy of measurement data, and can prevent that trace oxygen analyzer is subject to corrosion and damage.
For achieving the above object, the mensuration system of micro-oxygen content in ammonia of the present utility model, comprises the reduction valve that is connected with ammonia source and for measuring the trace oxygen analyzer of micro-oxygen content, it also comprises:
Washing bottle, desalted water is equipped with in its inside;
Moisture trap;
Drying bottle, drying agent is equipped with in its inside;
The first connecting tube, its one end is connected with the output terminal of described reduction valve, and the other end inserts in described desalted water, on this first connecting tube, disposes first flow meter;
For delivery of the nitrogen replacement pipeline of nitrogen, this nitrogen replacement pipeline inserts in described washing bottle and is positioned on the liquid level of described desalted water, on this nitrogen replacement pipeline, disposes the second flowmeter;
The second connecting tube, this second connecting tube one end is inserted in described washing bottle and is positioned on described desalted water liquid level, and the other end is connected with the lower end of described moisture trap;
The 3rd connecting tube, the 3rd one end of connecting tube and the upper end of described moisture trap are connected, and the other end is connected with the lower end of described drying bottle;
The 4th connecting tube, the 4th one end of connecting tube and the upper end of described drying bottle are connected, and the other end is connected with described trace oxygen analyzer.
Preferably, in ammonia of the present utility model, the mensuration system of micro-oxygen content also comprises:
First row waterpipe, is connected with the lower end of described moisture trap;
Second row waterpipe, is connected with the lower end of described washing bottle, on this second row waterpipe, is provided with drain solenoid valve;
Let out ammonia pond, the water of discharging for accepting described first row waterpipe and described second row waterpipe.
Preferably, also comprise and be used to described washing bottle to supply with the moisturizing pipeline of desalted water, on this moisturizing pipeline, dispose moisturizing solenoid valve.
Adopt the mensuration system of micro-oxygen content in ammonia of the present utility model, sample gas will just pass into trace oxygen analyzer and analyze mensuration after washing, the isolation of purified of moisture trap and the dehydration of drying bottle of washing bottle, the gas that therefore can guarantee to send into trace oxygen analyzer is dry and non-corrosive, guarantee the stability of mensuration system and the accuracy of determination data of micro-oxygen content, and it is corrosion-damaged to prevent that trace oxygen analyzer is subject to, extended the serviceable life of trace oxygen analyzer.
Accompanying drawing explanation
Fig. 1 is the structural representation of the mensuration system of micro-oxygen content in the ammonia of prior art;
Fig. 2 is the structural representation of the mensuration system of micro-oxygen content in ammonia of the present utility model;
Fig. 3 is the workflow diagram of the mensuration system of micro-oxygen content in ammonia of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, structure of the present utility model and principle of work etc. are further described.
Fig. 2 is the structural representation of the mensuration system of micro-oxygen content in ammonia of the present utility model, as shown in the figure, in ammonia of the present utility model, the mensuration system of micro-oxygen content mainly comprises: reduction valve 1, washing bottle 3, nitrogen replacement pipeline 6, moisture trap 4, drying bottle 5, trace oxygen analyzer 2, the first connecting tube 7, the second connecting tube 8, the 3rd connecting tube 9, the 4th connecting tube 10, moisturizing pipeline 13, first row waterpipe 12, second row waterpipe 11 and let out ammonia pond 14.
The input end of reduction valve 1 is connected with ammonia source, between washing bottle 3 and reduction valve 1, be provided with the first connecting tube 7, one end of the first connecting tube 7 is connected with the output terminal of reduction valve 1, the other end inserts in the desalted water in washing bottle 3, disposes for measuring the first flow meter 701 of sample airshed on the first connecting tube 7.
In washing bottle 3, desalted water is housed, because the water of 1 volume can dissolve the ammonia of 700 volumes, and the principal ingredient of sample gas is ammonia, therefore can, according to the volume of sample gas, calculate the volume of needed desalted water.Washing bottle 3 is connected with for supplementing the moisturizing pipeline 13 of desalted water and for the second row waterpipe 11 of draining.Wherein, one end of second row waterpipe 11 is connected with the lower end of washing bottle 3, and the other end leads to lets out ammonia pond 14, and disposes drain solenoid valve 15 on this second row waterpipe 11, disposes moisturizing solenoid valve 16 on moisturizing pipeline 13.In use procedure, if ammonia meltage is tending towards saturated in the desalted water in washing bottle 3, can open drain solenoid valve 15, by being tending towards saturated desalted water, entering and let out in ammonia pond 14, then close drain solenoid valve 15, open 16 pairs of washing bottles 3 of moisturizing solenoid valve and carry out moisturizing, like this, utilize second row waterpipe 11 and moisturizing pipeline 13 can supplement in time and change the desalted water in washing bottle 3, guarantee washing effect.
For carrying out the nitrogen replacement pipeline 6 of nitrogen replacement, insert washing bottle 3 and be positioned on desalted water liquid level, on this nitrogen replacement pipeline 6, disposing for measuring the second flowmeter 601 of nitrogen flow.
Between moisture trap 4 and washing bottle 3, be provided with the second connecting tube 8, these the second connecting tube 8 one end are inserted in washing bottle 3 and are positioned on desalted water liquid level, and the other end is connected with the lower end of moisture trap 4.The lower end of moisture trap 4 is provided with first row waterpipe 12, for isolated water is discharged.
The lower end of drying bottle 5 is connected with the upper end of moisture trap 4 by the 3rd connecting tube 9, and the upper end of drying bottle 5 is connected with trace oxygen analyzer 2 by the 4th connecting tube 10.A large amount of drying agent is housed in drying bottle 5, and as a kind of preferred, in the utility model, drying agent is selected discolour silica gel.Adopt discolour silica gel, be convenient to the usage degree of agent that sees drying, to change in time.
For preventing the pollution of the environment, in ammonia of the present utility model, the mensuration system of micro-oxygen content also comprises and lets out ammonia pond 14, the waste water of discharging for accepting first row waterpipe 12 and second row waterpipe 11.
Fig. 3 is the workflow diagram of the mensuration system of micro-oxygen content in ammonia of the present utility model, and as shown in the figure, this mensuration working-flow is:
S1: decompression.
Sample gas (being the rear ammonia producing of purifying distillation) is reduced pressure by reduction valve 2, after then measuring via first flow meter 701, input to washing bottle 3.
S2: ammonia is inhaled in washing.
First, according to the sample gas volume that passes into reduction valve, calculate the volume of required desalted water, and desalted water is packed in washing bottle 3.After sample gas being passed in desalted water by the first connecting tube 7, because the solubleness of ammonia in water is high, the ammonia in sample gas will all be desalted water and absorb, thus above washing bottle 3 interior desalted water liquid levels only oxygen and the water vapor of remaining minute quantity.
In this step, when the ammonia in desalted water is tending towards saturated, open drain solenoid valve 15, the deposed ammonia in washing bottle 3 is entered and let out ammonia pond 14 by second row water pipe 11.Then, closing drain solenoid valve 15, open moisturizing solenoid valve 16, is 3 moisturizings of washing bottle.
S3: nitrogen replacement.
Sample gas ammonia composition after washing is all water-soluble, above washing bottle 3 interior desalted water liquid levels, is only remaining a small amount of oxygen and water vapor.Now, the high pure nitrogen (99.9999% high pure nitrogen) identical with sample gas volume passed into nitrogen replacement pipeline 6, via nitrogen replacement pipeline 6, enter washing bottle 3, now, by the pressure of passed into high pure nitrogen be controlled at reduce pressure after the pressure of sample gas consistent, and guarantee that the flow of nitrogen is identical with the flow of sample gas, now high pure nitrogen is both as system substitution gas, complete nitrogen replacement, simultaneously as carrier gas, transmit.After this step, the principal ingredient of sample gas becomes nitrogen, water vapor and oxygen.
S4: gas-water separation.
Sample gas after nitrogen replacement enters in moisture trap 4 by the second connecting tube 8.The moisture trap 4 that the utility model is used is with 4 groups of condensate films, and sample gas is by processes such as reduction of speed, collision, break-in, cohesions in moisture trap 4, and water vapor and solid particulate matter in sample gas are removed, thereby realize gas-water separation, and sample gas is purified.The isolated water of institute, aperiodically by first row waterpipe 12, enters and lets out in ammonia pond 14.
S5: sample air dry.
Sample gas after gas-water separation enters in drying bottle 5 by the 3rd connecting tube 9.A large amount of drying agent is housed, for absorbing the residual water vapor of sample gas in drying bottle 5.
S6: oxygen analysis.
Sample gas after overdrying passes into trace oxygen analyzer 2 through the 4th connecting tube 10 and analyzes mensuration.
S7: discharge.
Sample gas after measurement finishes, not containing toxic gas, directly discharges.
Through above step, ammonia in sample gas is all desalted water and absorbs, and passed through the double dehydration of moisture trap and drying bottle, removed the moisture in sample gas, make the gas that finally enters trace oxygen analyzer neither contain water vapor, also, not containing corrosive gas, can not pollute the lambda sensor in trace oxygen analyzer, guarantee the stability of mensuration system, improved the precision of measuring.
To sum up, this mensuration system of the present utility model, sample gas, through the processing of a plurality of steps, has guaranteed the accuracy of measurement data, meanwhile, this mensuration system is easy to use.
Claims (3)
1. a mensuration system for micro-oxygen content in ammonia, comprises the reduction valve that is connected with ammonia source and for measuring the trace oxygen analyzer of micro-oxygen content, it is characterized in that, also comprises:
Washing bottle, desalted water is equipped with in its inside;
Moisture trap;
Drying bottle, drying agent is equipped with in its inside;
The first connecting tube, its one end is connected with the output terminal of described reduction valve, and the other end inserts in described desalted water, on this first connecting tube, disposes first flow meter;
For delivery of the nitrogen replacement pipeline of nitrogen, this nitrogen replacement pipeline inserts in described washing bottle and is positioned on the liquid level of described desalted water, on this nitrogen replacement pipeline, disposes the second flowmeter;
The second connecting tube, this second connecting tube one end is inserted in described washing bottle and is positioned on described desalted water liquid level, and the other end is connected with the lower end of described moisture trap;
The 3rd connecting tube, the 3rd one end of connecting tube and the upper end of described moisture trap are connected, and the other end is connected with the lower end of described drying bottle;
The 4th connecting tube, the 4th one end of connecting tube and the upper end of described drying bottle are connected, and the other end is connected with described trace oxygen analyzer.
2. the mensuration system of micro-oxygen content in ammonia as claimed in claim 1, is characterized in that, also comprises:
First row waterpipe, is connected with the lower end of described moisture trap;
Second row waterpipe, is connected with the lower end of described washing bottle, on this second row waterpipe, is provided with drain solenoid valve;
Let out ammonia pond, the water of discharging for accepting described first row waterpipe and described second row waterpipe.
3. the mensuration system of micro-oxygen content in ammonia as claimed in claim 1, is characterized in that, also comprises and is used to described washing bottle to supply with the moisturizing pipeline of desalted water, on this moisturizing pipeline, disposes moisturizing solenoid valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320460576.7U CN203405363U (en) | 2013-07-30 | 2013-07-30 | Measuring system for micro oxygen content in ammonia gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320460576.7U CN203405363U (en) | 2013-07-30 | 2013-07-30 | Measuring system for micro oxygen content in ammonia gas |
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| CN203405363U true CN203405363U (en) | 2014-01-22 |
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| CN201320460576.7U Expired - Lifetime CN203405363U (en) | 2013-07-30 | 2013-07-30 | Measuring system for micro oxygen content in ammonia gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107024412A (en) * | 2017-06-08 | 2017-08-08 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Aqueous high-purity argon gas monitoring system and method |
| CN113834864A (en) * | 2020-06-23 | 2021-12-24 | 宝山钢铁股份有限公司 | Method for prolonging service life of electrochemical oxygen sensor for trace oxygen analyzer |
| CN114720202A (en) * | 2021-01-06 | 2022-07-08 | 中昊晨光化工研究院有限公司 | Method and device for detecting trace oxygen content in low-pressure corrosive gas |
-
2013
- 2013-07-30 CN CN201320460576.7U patent/CN203405363U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107024412A (en) * | 2017-06-08 | 2017-08-08 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Aqueous high-purity argon gas monitoring system and method |
| CN113834864A (en) * | 2020-06-23 | 2021-12-24 | 宝山钢铁股份有限公司 | Method for prolonging service life of electrochemical oxygen sensor for trace oxygen analyzer |
| CN113834864B (en) * | 2020-06-23 | 2024-04-05 | 宝山钢铁股份有限公司 | Method for prolonging service life of electrochemical oxygen sensor for trace oxygen analyzer |
| CN114720202A (en) * | 2021-01-06 | 2022-07-08 | 中昊晨光化工研究院有限公司 | Method and device for detecting trace oxygen content in low-pressure corrosive gas |
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Granted publication date: 20140122 |
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| CX01 | Expiry of patent term |