CN213337490U - Combustion tube for high-temperature combustion ion chromatographic analyzer - Google Patents
Combustion tube for high-temperature combustion ion chromatographic analyzer Download PDFInfo
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- CN213337490U CN213337490U CN202021557117.7U CN202021557117U CN213337490U CN 213337490 U CN213337490 U CN 213337490U CN 202021557117 U CN202021557117 U CN 202021557117U CN 213337490 U CN213337490 U CN 213337490U
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Abstract
The utility model discloses a high temperature burning ion is burner tube for chromatographic analyzer, include: an outer tube and an inner tube; the outer tube body comprises a first outer tube and a second outer tube; one end of the first outer pipe is connected with the second outer pipe in a sealing mode; one end of the second outer pipe is of a sealing structure, and the sealing end of the second outer pipe is nested in the first outer pipe to form clearance fit; the inner pipe body is nested in the second outer pipe to form clearance fit; the pipe wall of the second outer pipe, which is far away from the sealing end, is provided with at least one vent hole; the inner tube body is provided with a sample inlet; and a water vapor inlet is formed in the pipe wall of the outer pipe body close to the sample introduction end. The utility model discloses a burning tube has compact structure, easy operation, has reduced dead volume and heat radiation and advantages such as long service life.
Description
Technical Field
The utility model relates to a measuring instrument field of combustible substance element content analysis especially relates to a high temperature burning ion is burner tube for chromatographic analyzer.
Background
The analysis of the content of elements in a sample is related to the analysis of the content of the elements in various fields of mineral resources, metallurgical engineering, environmental science, food safety and the like, and an ion chromatograph is the most common instrument for analyzing and determining the content of the elements. In the process of measuring the element content of a sample by using an ion chromatograph, the high-temperature hydrolysis pretreatment of the sample is an element analysis pretreatment method which is concerned in recent years, and the method has the characteristics of high-temperature pyrolysis and water distillation. The high-temperature hydrolysis mainly utilizes the volatile property of some elements (such as halogen), releases the elements from salts or other compounds thereof in the form of steam at high temperature (such as 1100 ℃), and then absorbs the steam in a proper absorption liquid, thereby realizing the separation and enrichment of the component to be detected. In the prior art, in order to accurately and rapidly determine the content of elements in a sample, high-temperature hydrolysis pretreatment of the sample is generally performed in a high-temperature combustion tube of a detection device, and steam and oxygen are filled into the combustion tube while heating up and heating, so as to perform hydrolysis reaction of the sample. The completion degree of the high-temperature hydrolysis of the sample is influenced by various factors such as hydrolysis temperature, water vapor temperature and flow rate, oxygen flow rate, chemical characteristics of the sample, catalysts and the like, and further, the high-temperature hydrolysis degree of the sample has important influence on the accuracy of element content determination and the recovery rate of the components to be detected. Therefore, the combustion tube is used as a reaction field for high-temperature hydrolysis of the sample, and the structural arrangement of the combustion tube has an important influence on the high-temperature hydrolysis degree of the sample. However, the existing single-layer or double-layer high-temperature hydrolysis combustion pipe has single function and structure, and accumulated water and condensed water are easily generated at the pipe orifice of the combustion pipe, so that the combustion pipe is corroded. In addition, the passing path of the sample in the combustion tube is short, so that incomplete sample cracking is easily caused, and the accuracy of a detection result is low; the sample with incomplete cracking is easy to form carbon deposit to remain in the combustion tube, so that the combustion tube is corroded, and the service life of the combustion tube is greatly shortened.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome prior art not enough, provide a compact structure, easy operation, can reduce dead volume and thermal radiation, long service life's high temperature combustion ion combustion tube for chromatographic analyzer.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a kind of high-temperature combustion ion chromatographic analyzer uses the burner tube, including: an outer tube and an inner tube; the outer tube body comprises a first outer tube and a second outer tube; one end of the first outer pipe is connected with the second outer pipe in a sealing mode; one end of the second outer pipe is of a sealing structure, and the sealing end of the second outer pipe is nested in the first outer pipe to form clearance fit; the inner pipe body is nested in the second outer pipe to form clearance fit; the pipe wall of the second outer pipe, which is far away from the sealing end, is provided with at least one vent hole; the inner tube body is provided with a sample inlet; and a water vapor inlet is formed in the pipe wall of the outer pipe body close to the sample introduction end.
As a further improvement of the utility model, the one end of interior body is equipped with the psammitolite filter, distance between vapor air inlet and the introduction port is less than the distance between air vent and the introduction port.
As a further improvement of the utility model, the vapor inlet is located the second outer tube, the junction of first outer tube and second outer tube is located between vapor inlet and the air vent.
As a further improvement of the utility model, a filter is arranged at one end of the inner tube body away from the sample inlet; the filter extends into the second outer tube.
As a further improvement of the utility model, the inner tube body is provided with a locating part on the tube wall close to the sample inlet.
As a further improvement of the present invention, the first outer tube and the second outer tube are integrally formed.
As a further improvement of the utility model, the other end of the first outer tube is a tapered interface.
As a further improvement, the conical frosted interface is provided with a limiting structure.
As a further improvement of the utility model, at least one of the air vents is uniformly arranged around the pipe wall of the second outer pipe.
Compared with the prior art, the utility model has the advantages of:
1. the utility model discloses a burning tube for high temperature combustion ion chromatography appearance forms the burning tube of three layer construction through the combination of the outer body with inner tube body and bilayer structure, and in the process of high temperature combustion hydrolysis, the gas that the sample burning produced passes to the second outer tube by the inner tube body earlier, and then passes to the first outer tube by the second outer tube, and the three-layer tube body structure of circuitous setting has effectively increased the route that the gas passes in the burning tube; particularly for a high-volatility sample, the three-layer tube body structure prolongs the time for high-temperature hydrolysis of sample gas in the combustion tube, so that the hydrolysis degree of the sample is improved, and the accuracy of a detection result is improved; in addition, the steam inlet is formed in the outer pipe body, so that accumulated water and condensed water generated at the pipe opening of the combustion pipe are avoided, the direct contact of a sample and the steam is avoided, the corrosion problem of the combustion pipe is effectively relieved, and the service life of the combustion pipe is prolonged.
2. The utility model discloses a high temperature burning ion is burner for chromatographic analyzer, through set up vapor air inlet and a plurality of air vent on the pipe wall at the second outer tube, the distance between vapor air inlet and the introduction end is less than the distance between air vent and the introduction end to the junction of first outer tube and second outer tube is located between vapor air inlet and the air vent, has effectively reduced dead volume and the heat radiation in the outer body, has reduced remaining of carbon deposit in the outer body, has improved the utilization ratio of burner.
3. The combustion tube for the high-temperature combustion ion chromatographic analyzer filters smoke dust carried in gas generated by sample combustion through the filter, and prevents the smoke dust from blocking the vent hole on the second outer tube; simultaneously, through set up limit structure near the introduction port of body including, effectively avoided the filter to block up the back interior body and collided outer body, improved the safety in utilization of burning tube.
Drawings
Fig. 1 is a schematic view of the structure principle of the combustion tube for the high-temperature combustion ion chromatography of the present invention.
Fig. 2 is the schematic diagram of the structural principle of the outer tube of the combustion tube for the high-temperature combustion ion chromatography analyzer.
Fig. 3 is the schematic diagram of the structural principle of the inner tube of the combustion tube for the high-temperature combustion ion chromatography analyzer.
Illustration of the drawings:
1. an outer tubular body; 11. a first outer tube; 12. a second outer tube; 13. a water vapor interface; 14. a vent hole; 2. an inner tube body; 21. A filter; 22. a limiting member; 3. a seal ring; 4. connecting blocks; 5. placing a sample box; 6. a sample boat.
Detailed Description
The invention will be further described with reference to the drawings and specific preferred embodiments without limiting the scope of the invention.
Examples
As shown in fig. 1 to fig. 3, the utility model discloses a burner tube for high temperature combustion ion chromatography appearance, include: an outer tube 1 and an inner tube 2; the outer body 1 comprises a first outer tube 11 and a second outer tube 12; one end of the first outer pipe 11 is hermetically connected with the second outer pipe 12; one end of the second outer tube 12 is of a sealing structure, and the sealing end of the second outer tube 12 is nested in the first outer tube 11 to form clearance fit; the inner pipe body 2 is nested in the second outer pipe 12 to form clearance fit; the pipe wall of the second outer pipe 12 far away from the sealing end is provided with at least one vent hole 14; the inner tube body 2 is provided with a sample inlet; and a water vapor inlet 13 is arranged on the pipe wall of the outer pipe body 1 close to the sample introduction end.
In a specific working process, the combustion tube is arranged in a high-temperature furnace of a high-temperature combustion ion chromatographic analyzer, a sample firstly enters the inner tube body 2, then is combusted under the action of high temperature to form gas, the gas is diffused into the second outer tube 12 and then enters the first outer tube 11 through the vent hole 14 in the second outer tube 12, and the sample gas after high-temperature hydrolysis enters the next detection module of the high-temperature combustion ion chromatographic analyzer through the tapered interface of the first outer tube body 11, so that the high-temperature hydrolysis pretreatment of the sample is completed.
In this embodiment, the inner tube 2 and the outer tube 1 having a double-layer structure are combined to form the combustion tube having a three-layer structure, in the process of high-temperature combustion hydrolysis, the sample is combusted in the inner tube 2 to form gas, the gas firstly passes through the inner tube 2 to the second outer tube 12, and then passes through the second outer tube 12 to the first outer tube 11, and the three-layer tube structure arranged in a roundabout manner effectively increases the passing path of the sample gas in the combustion tube. Especially for the sample with high volatility, the three-layer tube body structure prolongs the time for high-temperature hydrolysis of the sample gas in the combustion tube, is favorable for improving the hydrolysis degree of the sample, and improves the accuracy of the detection result. In addition, the steam inlet 13 is arranged on the second outer tube body 12, so that accumulated water and condensed water generated at the tube opening of the combustion tube are avoided, a sample is prevented from being directly contacted with the steam, the corrosion problem of the combustion tube is effectively relieved, and the service life of the combustion tube is prolonged.
As shown in fig. 1, in the present embodiment, the distance between the water vapor inlet 13 and the sample injection end is smaller than the distance between the vent hole 14 and the sample injection end. Further, the water vapor inlet 13 is located on the second outer tube 12, and the joint of the first outer tube 11 and the second outer tube 12 is located between the water vapor inlet 13 and the vent 14.
In this embodiment, by providing the water vapor inlet 13 and the plurality of vent holes 14 on the tube wall of the second outer tube 12, the distance between the water vapor inlet 13 and the sample injection end is smaller than the distance between the vent holes 14 and the sample injection end, and the joint between the first outer tube 11 and the second outer tube 12 is located between the water vapor inlet 13 and the vent holes 14; meanwhile, the diameters of the ports at the two ends of the outer tube 1 are smaller than the diameter of the middle part of the outer tube 1, namely, the diameter of the conical interface of the first outer tube 11 and the diameter of the second outer tube 12 are smaller than the diameter of the tube of the first outer tube 11, so that the dead volume and the heat radiation in the outer tube 1 are effectively reduced, the residue of carbon deposition in the outer tube 1 is reduced, and the utilization rate of the combustion tube is improved.
As shown in fig. 3, in this embodiment, a filter 21 is disposed at one end of the inner tube 2 away from the sample inlet; the filter 21 extends into the second outer tube 12. The filter filters out the smoke entrained in the gas generated by the sample combustion, so that the purity of the sample gas is improved, and the smoke in the gas is prevented from blocking the vent hole 14 on the second outer tube 12. In particular implementations, the filter 21 may be a sand core filter. It is understood that the filter 21 may have other structures having a filtering function.
Furthermore, a limiting member 22 is disposed on a tube wall of the inner tube 2 near the sample inlet. The retaining member 22 is located outside the second outer tube 12. Through set up limit structure near the introduction port of body 2 including, effectively avoided the back body 2 of psammitolite filter 21 jam to collide outer body 1, improved the safety in utilization of burner tube.
As shown in fig. 2, in the present embodiment, the first outer tube 11 is integrally formed with the second outer tube 12. By adopting the integral forming mode, the connection relation between the first outer pipe 11 and the second outer pipe 12 is simplified, and the sealing performance between the first outer pipe 11 and the second outer pipe 12 is effectively ensured. In this embodiment, the second outer tube 12 may be a U-shaped structure with one end sealed, and in other embodiments, the sealed end of the second outer tube 12 may also be a right-angle structure. It will be appreciated that the specific configuration of the second outer tube 12 need not be particularly limited, provided that it is a tube structure that has one end sealed and the other open, and that enables the inner tube 2 to nest within the second outer tube 12 with a clearance fit.
Further, in this embodiment, the other end of the first outer tube 11 is a tapered interface, and a limiting structure is disposed on the tapered interface. In particular, the tapered interface may be a frosted interface. Set up the toper interface of first outer tube 11 into taking spacing dull polish structure, improved the sealing connection performance between other subassemblies in outer body 1 and the high temperature combustion ion chromatographic analyzer, also can prevent other subassemblies of combustion tube and high temperature combustion ion chromatographic analyzer from bumping through limit structure, improve the safety in utilization of combustion tube.
In this embodiment, a plurality of vent holes 14 are uniformly arranged around the wall of the second outer tube 12. The burned gas of the sample in the second outer tube 12 enters the first outer tube 1 through the vent hole 14. Because the vent hole 14 is arranged on the pipe wall far away from the sealing end of the second outer pipe 12, and the vent hole 14 is close to the joint of the first outer pipe 1 and the second outer pipe 12, the passing path of gas generated by sample combustion in the second outer pipe 12 is prolonged, the passing path of gas in the first outer pipe 11 is prolonged, the high-temperature hydrolysis time of the sample in the combustion pipe is greatly increased, and the hydrolysis degree of the sample is improved.
As shown in fig. 1, when the combustion tube is matched with the lofting box 5 in the high-temperature combustion ion chromatography analyzer, the open end of the inner tube 2 is hermetically connected with the lofting box 5 of the high-temperature combustion ion chromatography analyzer, the side portion of the lofting box 5 is hermetically connected with the connecting block 4, the open end of the inner tube 2 penetrates through the connecting block 4 to be hermetically connected with the lofting box 5, the connecting block 4 is provided with a structure matched with the limiting piece 22, and the inner tube 2 is prevented from colliding with the outer tube 1 after the filter 21 is blocked. The second outer tube 12 of the outer tube 1 is sleeved on the periphery of the inner tube 2, and the open end of the second outer tube 12 is hermetically connected with the connecting block 4. The joint of the lofting box 5 and the connecting block 4, the joint of the inner pipe body 2 and the lofting box 5, and the joint of the second outer pipe 12 and the connecting block 4 are all provided with O-shaped sealing rings 3. In operation, a sample is placed in the sample boat 6 of the lofting box 5, the sample boat 6 with the sample enters the inner tube 2 under the driving of a sample feeding mechanism (not shown in the figure), the combustion tube is heated by a high temperature furnace (not shown in the figure), and meanwhile, water vapor is introduced into the combustion tube through the water vapor inlet 13 on the second outer tube 12; oxygen required by sample combustion enters the sample placing box 5 through the sample feeding mechanism and then enters the inner tube body 2. Under the action of high temperature, the sample in the sample boat 6 undergoes combustion hydrolysis, and specifically, gas generated by the combustion of the sample in the sample boat 6 passes through the filter 21 of the inner tube 2 into the second outer tube 12, and then passes through the vent hole 14 on the second outer tube 12 into the first outer tube 1. Because the combustion tube is in a high-temperature state and is filled with water vapor and oxygen, gas generated by sample combustion also carries out high-temperature hydrolysis reaction while passing among the inner tube body 2, the second outer tube 12 and the first outer tube 11, and the gas leaves the combustion tube after passing through three layers of tube bodies in a circuitous way.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. Those skilled in the art can make numerous changes and modifications to the disclosed embodiments, or modify equivalent embodiments, without departing from the spirit and scope of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments by the technical entity of the present invention all still belong to the protection scope of the technical solution of the present invention.
Claims (9)
1. A kind of high-temperature combustion ion chromatographic analyzer uses the burner tube, characterized by, including: an outer tube (1) and an inner tube (2); the outer body (1) comprises a first outer tube (11) and a second outer tube (12); one end of the first outer pipe (11) is hermetically connected with the second outer pipe (12); one end of the second outer pipe (12) is of a sealing structure, and the sealing end of the second outer pipe (12) is nested in the first outer pipe (11) to form clearance fit; the inner pipe body (2) is nested in the second outer pipe (12) to form clearance fit; the pipe wall of the second outer pipe (12) far away from the sealing end is provided with at least one vent hole (14); the inner tube body (2) is provided with a sample inlet; and a water vapor inlet (13) is arranged on the pipe wall of the outer pipe body (1) close to the sample introduction end.
2. The burner tube for a high temperature combustion ion chromatography analyzer according to claim 1, wherein the distance between the water vapor inlet port (13) and the sample introduction end is smaller than the distance between the vent hole (14) and the sample introduction end.
3. The burner tube for a high temperature combustion ion chromatography analyzer according to claim 2, wherein the water vapor inlet port (13) is located on the second outer tube (12), and the junction of the first outer tube (11) and the second outer tube (12) is located between the water vapor inlet port (13) and the vent hole (14).
4. The combustion tube for the high-temperature combustion ion chromatographic analyzer as set forth in any of claims 1 to 3, characterized in that the end of the inner tube body (2) away from the injection port is provided with a filter (21); the filter (21) extends into the second outer tube (12).
5. The burner tube for a high temperature combustion ion chromatography analyzer according to claim 4, wherein a stopper (22) is provided on the tube wall of the inner tube body (2) near the injection port.
6. The combustion tube for a high temperature combustion ion chromatography analyzer according to any one of claims 1 to 3, wherein the first outer tube (11) and the second outer tube (12) are integrally formed.
7. The combustion tube for a high-temperature combustion ion chromatography analyzer as set forth in any one of claims 1 to 3, wherein the other end of the first outer tube (11) is a tapered interface.
8. The combustion tube for a high-temperature combustion ion chromatography analyzer as set forth in claim 7, wherein: and the conical interface is provided with a limiting structure.
9. The combustion tube for a high temperature combustion ion chromatography analyzer according to any one of claims 1 to 3, wherein at least one of the vent holes (14) is uniformly arranged around the tube wall of the second outer tube (12).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021557117.7U CN213337490U (en) | 2020-07-30 | 2020-07-30 | Combustion tube for high-temperature combustion ion chromatographic analyzer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021557117.7U CN213337490U (en) | 2020-07-30 | 2020-07-30 | Combustion tube for high-temperature combustion ion chromatographic analyzer |
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| CN213337490U true CN213337490U (en) | 2021-06-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114646712A (en) * | 2022-03-22 | 2022-06-21 | 青岛盛瀚色谱技术有限公司 | Novel combustion online ion chromatography system and use method thereof |
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2020
- 2020-07-30 CN CN202021557117.7U patent/CN213337490U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114646712A (en) * | 2022-03-22 | 2022-06-21 | 青岛盛瀚色谱技术有限公司 | Novel combustion online ion chromatography system and use method thereof |
| CN114646712B (en) * | 2022-03-22 | 2024-01-09 | 青岛盛瀚色谱技术有限公司 | Novel combustion online ion chromatography system and application method thereof |
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