CN204807382U - Special quartzy schizolysis pipe of off -line gas analysis - Google Patents
Special quartzy schizolysis pipe of off -line gas analysis Download PDFInfo
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- CN204807382U CN204807382U CN201520513686.4U CN201520513686U CN204807382U CN 204807382 U CN204807382 U CN 204807382U CN 201520513686 U CN201520513686 U CN 201520513686U CN 204807382 U CN204807382 U CN 204807382U
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Abstract
The utility model relates to a special quartzy schizolysis pipe of off -line gas analysis, its characterized in that: (1 )This schizolysis pipe is fired by high -purity quartz and is formed, can be able to bear or endure the high temperature more than 1250 DEG C, (2 )This schizolysis pipe only designs an oxygen entry, and oxygen is not only as the carrier gas but also make combustion -supporting gas, (3 )The design of its body entrance has an introduction port, will await measuring through this introduction port and gaseously introduce quartzy schizolysis pipe and burn, (4 )The design of this schizolysis pipe has sealing connection together and coaxial advance an appearance pipe and a double -deck combustion tube, advances the appearance pipe and exports on the contrary with inlayer combustion tube export orientation, and the inlayer combustion tube is opposite with outer combustion tube export orientation. The utility model discloses the assay determination of harmful elements such as in the petrochemical gas aspect article such as the mainly used natural gas, coal gas, liquefied gas, ethylene, propane total sulfur, total nitrogen and total chlorine, 10 milliliters sample sizes the biggest showed and promoted 4 times present in the time of can be with gas analysis, reached 50 milliliters to signal when the reinforcing is measured.
Description
Technical field
The utility model relates to the special crystalline silica cracking tube of a kind of off-line gas analysis, be mainly used in the harmful elements such as total sulfur in the petrochemical complex class gaseous samples such as rock gas, coal gas, liquefied gas, ethene, propane, total nitrogen and total chlorine to measure containing quantitative analysis, belong to Petrochemical Engineering Analysis technical field.
Background technology
In the production of the petrochemical complex class gaseous samples such as rock gas, coal gas, liquefied gas, ethene, propane, storage, transport and use procedure, the existence of the trace element such as sulphur wherein, chlorine, nitrogen be cause production equipment burn into catalyst poisoning, product chemicals poor stability, toxic emission exceeds standard etc. principal element.Therefore, most important in current oil chemical industry, modal analysis project has been become to the detection of the constituent contents such as sulphur, chlorine, nitrogen in various gaseous state petroleum chemicals.And when detecting various gaseous sample, off-line analysis remains current Main Means.
Nowadays, when carrying out the off-line analysis of the trace elements such as total sulfur in various gaseous state petroleum chemicals, total nitrogen, total chlorine, main employing ultraviolet fluorescence method, chemoluminescence method and small-hole drilling, these methods all sample must be incorporated into be heated to 800 ~ 1100 DEG C crystalline silica cracking tube in make sample generation oxidizing fire, be converted into detectable sulphur, chlorine, nitrogen etc., then detect.When there is combustion reaction, the structural design of crystalline silica cracking tube directly affects accuracy of detection and the sensitivity of maximum sample size that instrument allows and instrument.Currently marketed off-line gas analysis crystalline silica cracking tube ubiquity the problem that sample is short at cracking intraductal retention time, sample size is little, general sample size is all at 1 ~ 5 milliliter, maximum sample size is also only 10 milliliters, sample size then easily causes incomplete combustion and forms carbon distribution slightly greatly, thus cause light path pollution, sample chamber pollution, detecting device to pollute and electrolytic cell pollution, deal with and bother very much, even cause instrument to run when carbon distribution is serious, directly scrap.Due to the impact of carbon distribution, directly limit cannot promoting of sample size, thus the further lifting of the precision of method when limiting the trace element detections such as total sulfur, total nitrogen, total chlorine, accuracy, Monitoring lower-cut and detectability.Therefore, design the special crystalline silica cracking tube of a large sample size off-line gas analysis, be the striving direction of petrochemical industry analyst always.
Utility model content
The purpose of this utility model is to overcome weak point of the prior art, the special crystalline silica cracking tube of off-line gas analysis of provide that a kind of brand new designs, can solve carbon distribution problem completely, significantly improve gaseous sample sample size, fundamentally promote method precision when harmful element detects, accuracy, Monitoring lower-cut and detectability.
The utility model adopts following technical scheme:
The special crystalline silica cracking tube of a kind of off-line gas analysis, comprises body, firing chamber, the injection port being positioned at body front end, oxygen intake, fixed leg, sample feeding pipe and is positioned at the mixed gas outlet pipe of body rear end.Described cracking tube is designed with and is sealed connected together and coaxial sample feeding pipe and double-deck cracking tube, and sample feeding pipe outlet is contrary with internal layer cracking tube Way out, and internal layer cracking tube is contrary with outer cracking tube Way out.Described cracking tube only designs an oxygen intake, and oxygen not only made combustion-supporting gas as carrier gas; Body front end is also designed with fixed leg, for crystalline silica cracking tube is fixed on high-temperature cracking furnace.
Described sample feeding pipe is straight tube, and diameter is Φ 10 ~ 15mm, and this sample feeding pipe extends to the rear end of internal layer cracking tube.Described internal layer cracking tube length is 200 ~ 300mm, and outer cracking tube length is 400 ~ 450mm, and internal layer cracking tube diameter is Φ 18-25mm, and outer cracking tube diameter is Φ 25-30mm.
This cracking tube is fired by high purity quartz and is formed, can the high temperature of resistance to more than 1250 DEG C.
The utility model has the advantages that:
1. devise and be sealed connected together and coaxial sample feeding pipe and double-deck cracking tube, after gaseous sample is introduced into sample feeding pipe, first namely burn at the end of sample feeding pipe, then through internal layer cracking tube generation secondary combustion, product after burning enters outer cracking tube from internal layer cracking tube again, again occur fully to burn completely, eventually pass mixed gas outlet pipe and enter detecting device.Like this, will there is repeatedly Thorough combustion in gas to be measured in crystalline silica cracking tube, do not have any carbon distribution and produce, thus significantly improve the sample size of gaseous sample, ensure that large sample size and the fast sample analysis of gas.
2. abandon traditional carrier gas inlet (argon gas) and help two entry design of fuel gas inlet (oxygen), only design an oxygen intake, gaseous sample to be measured was both loaded into cracking tube as carrier gas by oxygen, made gaseous sample to be measured carry out Thorough combustion in cracking tube again as combustion-supporting gas.Traditional carrier gas inlet design adopts argon gas as carrier gas, and this is mainly in order to burn out the stainless steel syringe needle of micro syringe when preventing liquid sample from high temperature gasifying; And when carrying out gaseous sample analysis, then without the need to through the liquid conversion to gaseous state, therefore without the need to adopting argon gas as carrier gas, only the first half of sample feeding pipe need be designed in the outside of pyrolysis furnace, the part namely between injection port and fixed leg.Because this part is in the outside of pyrolysis furnace, temperature is relatively low, therefore there will not be syringe needle by the situation of burning.Advantage of this design is namely to save expensive argon gas, additionally reduces a possible interference source; And owing to being all oxygen in cracking tube, sample also can being made to obtain more fully fully burning, do not produce any carbon distribution even if improve sample size, thus the accurate stable achieving the micronutrient levelss such as sulphur in gaseous sample, chlorine, nitrogen is measured.
3. devise fixed leg, for crystalline silica cracking tube is fixed on high-temperature cracking furnace.Which solves the crystalline silica cracking tube caused due to the mobile problem of cracking tube in sample introduction process to damage, and the problem of the analysis result poor repeatability caused.
4. adopt the special crystalline silica cracking tube of off-line gas analysis of the utility model design, because sample combustion reacts completely, do not produce any carbon distribution, current maximum sample size 10 milliliters when then gaseous sample harmful element can be analyzed significantly improves 4 times, reach 50 milliliters, thus the signal relatively strengthened when measuring, significantly improve the detection sensitivity of low content total sulfur, total nitrogen, total chlorine etc., Monitoring lower-cut can be low to moderate 0.05mg/m
3, detectability can be low to moderate 0.02mg/m
3.
Accompanying drawing explanation
Fig. 1 is the special crystalline silica cracking tube of the utility model off-line gas analysis.
Embodiment
Figure 1 shows that the special crystalline silica cracking tube of the utility model off-line gas analysis, the oxygen intake 3 of flame tube front end is communicated with injection port 2, oxygen purity is generally high purity oxygen gas, and adjustment oxygen flow is 250 ~ 450ml/min, and injection port 2 silica gel plug seals.After extracting appropriate amount of sample with glass syringe, penetrate injection port 2 by silica gel plug, then utilize mechanical pusher or manually gaseous sample to be measured pushed sample feeding pipe 5.Under the carrying of oxygen, sample is in the latter end generation combustion reaction of sample feeding pipe 5.
Combination gas after burning enters internal layer cracking tube 6 by sample feeding pipe 5, and secondary combustion occurs.Sample feeding pipe 5 is designed to contrary with internal layer cracking tube 6 direction, thus makes the gaseous sample do not burnt completely at sample feeding pipe 5 latter end all enter internal layer cracking tube 6, again burns.Internal layer cracking tube 6 is contrary with outer cracking tube 7 Way out, and combination gas after secondary combustion occurs internal layer cracking tube 6, then enters outer cracking tube 7 by internal layer cracking tube 6, again burns.Through repeatedly fully repeating burning, then do not have any carbon distribution and produce, thus significantly improve the sample size of gaseous sample, ensure that large sample size when gaseous sample is analyzed and fast sample analysis.
Sample outside layer cracking tube 7, after Thorough combustion again, under the carrying of oxygen, enters detecting device via mixed gas outlet pipe 8 and detects.
The analysis that the utility model is used for the impurity contents such as total sulfur in the petrochemical complex gaseous samples such as rock gas, coal gas, liquefied gas, ethene, propane, total nitrogen and total chlorine measures, it is the special cracking tube of a kind of off-line gas analysis, transformed injection port part, the on-line analysis that also can be used for the impurity contents such as total sulfur in various petrochemical complex gaseous sample, total nitrogen and total chlorine measures.Have that sample size is large, signal absolute value is high, signal to noise ratio (S/N ratio) is high, testing result accuracy is high, precision good, Monitoring lower-cut and the low advantage of detectability.
Claims (6)
1. the special crystalline silica cracking tube of off-line gas analysis, comprise body, firing chamber, the injection port being positioned at body front end, oxygen intake, fixed leg, sample feeding pipe and be positioned at the mixed gas outlet pipe of body rear end, it is characterized in that described cracking tube is designed with to be sealed connected together and coaxial sample feeding pipe and double-deck cracking tube, sample feeding pipe outlet is contrary with internal layer cracking tube Way out, internal layer cracking tube is contrary with outer cracking tube Way out, and can the high temperature of resistance to more than 1250 DEG C; Described cracking tube only designs an oxygen intake, and oxygen not only made combustion-supporting gas as carrier gas; Body front end is also designed with fixed leg, for crystalline silica cracking tube is fixed on high-temperature cracking furnace.
2. cracking tube according to claim 1, is characterized in that this cracking tube is fired by high purity quartz and forms.
3. cracking tube according to claim 1, it is characterized in that its internal layer cracking tube length is 1/2 ~ 3/4 of outer cracking tube, internal layer cracking tube diameter is 2/3 ~ 4/5 of outer cracking tube.
4. cracking tube according to claim 1, it is characterized in that its sample feeding pipe is straight tube, diameter is 10 ~ 15mm.
5. cracking tube according to claim 1, is characterized in that its sample feeding pipe extends to the rear end of internal layer cracking tube.
6. cracking tube according to claim 1, is characterized in that carrier gas needed for this cracking tube is oxygen, and required combustion-supporting gas is also oxygen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520513686.4U CN204807382U (en) | 2015-07-07 | 2015-07-07 | Special quartzy schizolysis pipe of off -line gas analysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520513686.4U CN204807382U (en) | 2015-07-07 | 2015-07-07 | Special quartzy schizolysis pipe of off -line gas analysis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204807382U true CN204807382U (en) | 2015-11-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520513686.4U Expired - Fee Related CN204807382U (en) | 2015-07-07 | 2015-07-07 | Special quartzy schizolysis pipe of off -line gas analysis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204807382U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153699A (en) * | 2016-07-28 | 2016-11-23 | 中国石油化工股份有限公司 | A kind of method improving analysis of total sulfur accuracy |
| CN108169405A (en) * | 2017-12-01 | 2018-06-15 | 宁波出入境检验检疫局检验检疫技术中心 | Oil and the big sample size combustion tube of petroleum chemicals analysis |
-
2015
- 2015-07-07 CN CN201520513686.4U patent/CN204807382U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153699A (en) * | 2016-07-28 | 2016-11-23 | 中国石油化工股份有限公司 | A kind of method improving analysis of total sulfur accuracy |
| CN106153699B (en) * | 2016-07-28 | 2019-03-15 | 中国石油化工股份有限公司 | A method of improving analysis of total sulfur accuracy |
| CN108169405A (en) * | 2017-12-01 | 2018-06-15 | 宁波出入境检验检疫局检验检疫技术中心 | Oil and the big sample size combustion tube of petroleum chemicals analysis |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151125 Termination date: 20170707 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |