CN210639133U - Single cold hydrazine secondary thermal desorption equipment - Google Patents
Single cold hydrazine secondary thermal desorption equipment Download PDFInfo
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- CN210639133U CN210639133U CN201921659963.7U CN201921659963U CN210639133U CN 210639133 U CN210639133 U CN 210639133U CN 201921659963 U CN201921659963 U CN 201921659963U CN 210639133 U CN210639133 U CN 210639133U
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- pipe
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- gas circuit
- way valve
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Abstract
The utility model provides a single cold hydrazine secondary thermal desorption equipment, its technical scheme is: the three ends of the first enrichment pipe (2) are connected through a gas circuit, the middle end is connected with a sample gas inlet pipe (1), the upper end is connected with a sample gas outlet pipe (3), the lower end is connected with a ten-way valve (6), the ten-way valve (6) is connected with three paths through a gas circuit, the right path is connected with a chromatographic analyzer (7), the left path is connected with a gas carrier pipe (4) through a mass flow controller (5) gas circuit, and the lower path is connected with a waste gas outlet pipe (9) through a second enrichment pipe (8) gas circuit. The utility model discloses beneficial effect: reasonable in design is practical, has improved the precision of analysis to reduce the detection limit of target material, can detect the target material of lower concentration, do benefit to the environmental protection and detect widelys popularize.
Description
Technical Field
The utility model belongs to the technical field of the analytic technique of single cold hydrazine secondary heat and specifically relates to single cold hydrazine secondary thermal desorption equipment.
Background
The original instrument adopts once enrichment, analysis to advance the appearance, because once enrichment adopts bulky sampling, and the enrichment needs great purge flow just can blow out the target object in high capacity's adsorption tube when the analysis, easily causes chromatographic peak widen, influences chromatographic analysis's accuracy and detection limit. Through the design, the problems are completely solved through the enrichment and the analysis of the secondary small-capacity enrichment pipe, the analysis precision is improved, the detection limit of the target substance is reduced, and the target substance with lower concentration can be detected.
Disclosure of Invention
The utility model provides a single cold hydrazine secondary thermal desorption equipment of improvement analytical accuracy, its technical scheme is: the three ends of the first enrichment pipe are connected through a gas circuit, the middle end of the first enrichment pipe is connected with a sample gas inlet pipe, the upper end of the first enrichment pipe is connected with a sample gas outlet pipe, the lower end of the first enrichment pipe is connected with a ten-way valve, the ten-way valve is further connected with three paths of gas circuits, the right path of the first enrichment pipe is connected with a chromatographic analyzer, the left path of the first enrichment pipe is connected with a gas carrying pipe through a mass flow controller.
The utility model discloses beneficial effect: reasonable in design is practical, has improved the precision of analysis to reduce the detection limit of target material, can detect the target material of lower concentration, do benefit to the environmental protection and detect widelys popularize.
Drawings
Fig. 1 is a schematic flow chart of the present invention.
Detailed Description
As shown in fig. 1, the single-cold hydrazine secondary thermal desorption apparatus is mainly composed of a sample gas inlet pipe 1, a first enrichment pipe 2, a sample gas outlet pipe 3, a carrier gas pipe 4, a mass flow controller 5, a ten-way valve 6, a chromatograph 7, a second enrichment pipe 8 and a waste gas outlet pipe 9. The three ends of the first enrichment pipe 2 are connected through a gas circuit, the middle end of the first enrichment pipe is connected with a sample gas inlet pipe 1, the upper end of the first enrichment pipe is connected with a sample gas outlet pipe 3, the lower end of the first enrichment pipe is connected with a ten-way valve 6, the ten-way valve 6 is connected with three paths through a gas circuit, the right path of the first enrichment valve is connected with a chromatographic analyzer 7, the left path of the first enrichment pipe is connected with a gas carrier pipe 4 through a gas circuit of a mass.
The utility model discloses use
The device is mainly applied to enrichment and concentration of organic pollutants in the atmosphere, and is matched with a chromatographic analyzer 7 for analysis of the organic pollutants in the atmosphere. The first heating enrichment pipe 2 and the second enrichment pipe 8 are firstly blown and activated for 3 minutes by nitrogen through the carrier gas pipe 4, the enrichment pipes are blown clean before sampling, and the enrichment pipes pass through the sample gas outlet pipe 3 and the waste gas outlet pipe 9. The activated enrichment tube was cooled for 10 minutes. Sampling is started for 30 minutes after the enrichment pipe is cooled, sample gas enters the high-capacity enrichment pipe 2 through the sample gas inlet pipe 1, and the target substance is enriched in the enrichment pipe 2 for the first time. After the enrichment is finished, the enrichment tube 2 is heated and analyzed for 3 minutes, the target substance is released, and redundant gas is discharged through the sample gas outlet tube 3. The target substance resolved in the first enrichment pipe 1 enters the second low-capacity enrichment pipe 8 through the ten-way valve 6 under the drive of nitrogen of the carrier gas pipe 4, and the target substance is secondarily enriched in the second enrichment pipe 8. And after the secondary enrichment is finished, heating and analyzing the second enrichment tube 2 for 3 minutes, and releasing the target substance again through the secondary heating and analyzing. The target substance resolved in the enrichment two-tube 2 enters the chromatographic analyzer for analysis through the ten-way valve 6 under the drive of nitrogen, and the sample injection is generally set to be 0.1 minute. And after the sample injection is finished, the enrichment second tube 8 is purged and activated for 3 minutes by using nitrogen, so that preparation is made for the next circulation.
Claims (1)
1. Single cold hydrazine secondary thermal desorption equipment which is characterized in that: the three ends of the first enrichment pipe (2) are connected through a gas circuit, the middle end is connected with a sample gas inlet pipe (1), the upper end is connected with a sample gas outlet pipe (3), the lower end is connected with a ten-way valve (6), the ten-way valve (6) is connected with three paths through a gas circuit, the right path is connected with a chromatographic analyzer (7), the left path is connected with a gas carrier pipe (4) through a mass flow controller (5) gas circuit, and the lower path is connected with a waste gas outlet pipe (9) through a second enrichment pipe (8) gas circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921659963.7U CN210639133U (en) | 2019-10-03 | 2019-10-03 | Single cold hydrazine secondary thermal desorption equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921659963.7U CN210639133U (en) | 2019-10-03 | 2019-10-03 | Single cold hydrazine secondary thermal desorption equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210639133U true CN210639133U (en) | 2020-05-29 |
Family
ID=70799100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921659963.7U Active CN210639133U (en) | 2019-10-03 | 2019-10-03 | Single cold hydrazine secondary thermal desorption equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210639133U (en) |
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2019
- 2019-10-03 CN CN201921659963.7U patent/CN210639133U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Secondary thermal analysis equipment of hydrazine Effective date of registration: 20200902 Granted publication date: 20200529 Pledgee: Dongying Branch of Qilu Bank Co.,Ltd. Pledgor: SHANDONG HAIHUI ENVIRONMENTAL TECHNOLOGY Co.,Ltd. Registration number: Y2020980005640 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20221212 Granted publication date: 20200529 Pledgee: Dongying Branch of Qilu Bank Co.,Ltd. Pledgor: SHANDONG HAIHUI ENVIRONMENTAL TECHNOLOGY Co.,Ltd. Registration number: Y2020980005640 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |