CN102410942A - Online sampling system - Google Patents
Online sampling system Download PDFInfo
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- CN102410942A CN102410942A CN2011102084830A CN201110208483A CN102410942A CN 102410942 A CN102410942 A CN 102410942A CN 2011102084830 A CN2011102084830 A CN 2011102084830A CN 201110208483 A CN201110208483 A CN 201110208483A CN 102410942 A CN102410942 A CN 102410942A
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Abstract
The invention provides an online sampling system, which comprises a sampling switch valve located close to sampling points of a technical pipeline; the sampling switch valve is connected with a sampling proportional valve by a sampling pipeline; the sampling proportional valve is further connected with an inlet pipeline and a gas carrying pipeline of an analytical instrument; a sampling quantificational pipe is bridged between the two interfaces of the sampling proportional valves. The online sampling system is characterized in that the sampling proportional valve is connected with an emptying pipeline; the emptying pipeline is connected with a buffering tank by a switch valve; and the buffering tank pipeline is connected with a vacuum pump. The online sampling system provided by the invention can realize online sampling under working conditions of low system pressure of device, unstable material, higher pipeline heat-tracing temperature, which is featured by simple process, low cost, safety and reliability. Therefore, the online sampling system can be widely applied for online sampling of special working conditions of production and test devices of petroleum, chemical industries and the like.
Description
Technical field
The present invention relates to a kind of negative pressure of vacuum on-line sampling system, be used for the reactiveness of chemical production device and test unit is carried out real time on-line monitoring.
Background technology
Along with science and technology development and the raising of degree automatically; Need carry out real time on-line monitoring to the reactiveness in chemical production device and the test unit; Just relate to the on-line sampling problem; The material full constituent that is about to the device sampled point in time stably is transported in the online analytical instrument, makes that the analysis data are representative.
For some special operation conditions, low like apparatus system pressure, material is unstable, and thermal sensitivity is strong; Must be within the specific limits with temperature control, simple pipeline companion heat can solve temperature problem, but for the lower operating mode of system pressure; System pressure is difficult to overcome the on-way resistance of sample lines, and analytical instrument is difficult to take fresh sample, and it is not representative to analyze data; And be equipped with traditional gas samping pump, minipump; Generally require flow medium to be no more than 80 ℃, limited the temperature of medium, inapplicable for the operating mode of higher temperature companion heat.
Summary of the invention
The purpose of this invention is to provide a kind of negative pressure of vacuum on-line sampling system, the sampling of the online analytical instrument under the operating mode such as be used for Chemical Manufacture and test unit pipe system pressure is low, material is unstable, sample lines needs higher temperature companion heat.
In order to achieve the above object, technical scheme of the present invention has provided a kind of on-line sampling system, comprises near the sampling switch valve that is positioned at the process pipeline sampled point; The sampling switch valve links to each other with the sampling proportional valve through sample lines; The sampling proportional valve also connects analytical instrument entrance pipe, gas-carrier pipeline, cross-over connection sampling quantity tube between two interfaces of sampling proportional valve, and it is characterized in that: the sampling proportional valve connects the emptying pipeline; The emptying pipeline inserts surge tank through switch valve; The surge tank pipeline connects vacuum pump, during sampling, through the sampling proportional valve with sample lines, sampling quantity tube and the conducting of emptying pipeline; During sample introduction, through the sampling proportional valve with gas-carrier pipeline, sampling quantity tube and the conducting of instrument entrance pipe.
Preferably, on said surge tank, be connected with vacuum release valve.
Preferably, on the pipeline between said vacuum pump and the said surge tank, be connected with tensimeter.
Preferably, said sampling proportional valve and said sampling quantity tube are located in the constant temperature oven, outside said sample lines, instrument entrance pipe and emptying pipeline are positioned at the part of constant temperature oven, are provided with the pipeline heating tape.
The on-line sampling system that the present invention proposes reduces the pressure of sample lines through vacuumizing, and makes that the material in the low-pressure process pipeline can get under pressure reduction in the sampling proportional valve automatically; Change medium temperature through the vacuum pump inlet surge tank, with the material collection of unstable chemcial property therein, thereby with sample lines and vacuum pump isolation, the hot temperature of the companion of sample lines can improve greatly, does not receive the restriction of vacuum pump heatproof.This on-line sampling system has realized that apparatus system pressure is low, material is unstable; Need higher pipeline to accompany the on-line sampling under the hot temperature operating mode; It is simple to have flow process; Expense is low, and safe and reliable advantage can be widely used in the special operation condition on-line sampling of industry production such as oil, chemical industry and test unit.
Description of drawings
Fig. 1 is the principle schematic of a kind of on-line sampling provided by the invention system;
Fig. 2 is the sample states figure of sampling proportional valve;
Fig. 3 is the sample introduction state of sampling proportional valve.
Embodiment
For making the present invention more obviously understandable, now with a preferred embodiment, and conjunction with figs. elaborates as follows.
As shown in Figure 1, the invention provides a kind of on-line sampling system, comprise near the sampling switch valve 2 that is positioned at process pipeline 1 sampled point, sampling switch valve 2 links to each other with sampling proportional valve 5 through sample lines 3.Wherein, Have six interfaces on the sampling proportional valve 5; Interconnect between per two interfaces, it is right to have three groups of interfaces that are communicated with, and these interfaces connect analytical instrument entrance pipe 8, gas-carrier pipeline 9, sample lines 3 and emptying pipeline 11 respectively; Cross-over connection sampling quantity tube 7 between sampling proportional valve 5 remaining two interfaces is disconnected between two interfaces of cross-over connection sampling quantity tube 7.Emptying pipeline 11 inserts surge tank 13 through switch valve 12, on surge tank 13, is connected with vacuum release valve 14, and surge tank 13 pipelines connect vacuum pump 16, on the pipeline between vacuum pump 16 and the surge tank 13, are connected with tensimeter 15.
As shown in Figure 2, during sampling, through sampling proportional valve 5 with sample lines 3, sampling quantity tube 7 and 11 conductings of emptying pipeline.As shown in Figure 3, during sample introduction, through sampling proportional valve 5 with gas-carrier pipeline 9, sampling quantity tube 7 and 8 conductings of instrument entrance pipe.Realize through the spool of rotation sampling proportional valve 5 between the two states.
The job step of a kind of on-line sampling system that the present invention proposes is following:
Step 1: close the switch valve 1 on the sample lines, open the switch valve 12 on the vacuum-pumping pipeline, sampling proportional valve 5 is in sample states, and vacuum pump vacuumizes sample lines 3 and sampling quantity tube 7;
Step 2: after pipeline vacuum tightness reaches requirement, close the switch valve 12 on the vacuum-pumping pipeline;
Step 3: open the switch valve 1 on the sample lines, 5 samplings of sampling proportional valve;
Step 4: the state of switch sampling proportional valve 5, make it be in the sample introduction state, the in-line analyzer sample introduction is analyzed;
Step 5: close the switch valve 1 on the sample lines, open the switch valve 12 on the vacuum-pumping pipeline;
Step 6: the state of switch sampling proportional valve 5 makes it be in sample states.
Step 7: repeating step one～step 6 begins to replace the residual micro-material in the pipeline or carries out the next round sampling.
Claims (4)
1. on-line sampling system; Comprise and be positioned near the sampling switch valve (2) of process pipeline (1) sampled point; Sampling switch valve (2) links to each other with sampling proportional valve (5) through sample lines (3); Sampling proportional valve (5) also connects analytical instrument entrance pipe (8), gas-carrier pipeline (9), cross-over connection sampling quantity tube (7) between two interfaces of sampling proportional valve (5), and it is characterized in that: sampling proportional valve (5) connects emptying pipeline (11); Emptying pipeline (11) inserts surge tank (13) through switch valve (12); Surge tank (13) pipeline connects vacuum pump (16), during sampling, through sampling proportional valve (5) with sample lines (3), sampling quantity tube (7) and emptying pipeline (11) conducting; During sample introduction, through sampling proportional valve (5) with gas-carrier pipeline (9), sampling quantity tube (7) and instrument entrance pipe (8) conducting.
2. a kind of on-line sampling as claimed in claim 1 system is characterized in that: on said surge tank (13), be connected with vacuum release valve (14).
3. a kind of on-line sampling as claimed in claim 1 system is characterized in that: on the pipeline between said vacuum pump (16) and the said surge tank (13), be connected with tensimeter (15).
4. a kind of on-line sampling as claimed in claim 1 system; It is characterized in that: said sampling proportional valve (5) and said sampling quantity tube (7) are located in the constant temperature oven (6), outside said sample lines (3), instrument entrance pipe (8) and emptying pipeline (11) are positioned at the part of constant temperature oven (6), are provided with pipeline heating tape (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102084830A CN102410942A (en) | 2011-07-25 | 2011-07-25 | Online sampling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102084830A CN102410942A (en) | 2011-07-25 | 2011-07-25 | Online sampling system |
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| CN102410942A true CN102410942A (en) | 2012-04-11 |
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| CN2011102084830A Pending CN102410942A (en) | 2011-07-25 | 2011-07-25 | Online sampling system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471874A (en) * | 2013-09-29 | 2013-12-25 | 国家电网公司 | Automatic quantitative sampling device for barreled steam turbine oil |
| CN103698445A (en) * | 2013-12-18 | 2014-04-02 | 迈瑞尔实验设备（上海）有限公司 | Online micro sample collector and sampling analysis method |
| CN103728157A (en) * | 2013-12-25 | 2014-04-16 | 福建省邵武市永晶化工有限公司 | Sampling system of iodine pentafluoride or antimony fluoride |
| CN104075915A (en) * | 2014-07-22 | 2014-10-01 | 武汉市天虹仪表有限责任公司 | Vacuum pipeline system and method for gas sampling |
| CN104406824A (en) * | 2014-09-29 | 2015-03-11 | 泸州北方化学工业有限公司 | Method for sampling flammable and explosive gas under negative pressure |
| CN105004572A (en) * | 2015-07-27 | 2015-10-28 | 中国原子能科学研究院 | Automatic quantitative sampling device |
| CN107063778A (en) * | 2017-05-10 | 2017-08-18 | 张家港市华昌新材料科技有限公司 | A kind of online internal-circulation type enclosed sampling system and method for propylene |
| CN110608922A (en) * | 2019-09-10 | 2019-12-24 | 北京建筑大学 | Liquid sample vacuum collecting device and control method |
| CN110702475A (en) * | 2019-11-26 | 2020-01-17 | 怀化学院 | Gas sampling device and gas sampling method |
| CN115452483A (en) * | 2022-11-14 | 2022-12-09 | 胜利油田胜鑫防腐有限责任公司 | Sampling device and sampling method for petroleum detection |
| CN116754666A (en) * | 2023-05-24 | 2023-09-15 | 江苏省环境科学研究院 | In-situ rapid detection system for volatile organic pollutants in soil groundwater |
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| CN202171545U (en) * | 2011-07-25 | 2012-03-21 | 迈瑞尔实验设备（上海）有限公司 | Online sampling system |
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| JP2006242720A (en) * | 2005-03-02 | 2006-09-14 | Shimadzu Corp | Automatic sample introducing apparatus |
| CN2881592Y (en) * | 2005-12-22 | 2007-03-21 | 北京市劳动保护科学研究所 | Sample collecting and feeding device of portable gas chromatograph |
| CN101074924A (en) * | 2007-05-16 | 2007-11-21 | 洪陵成 | Method for fastly analyzing chemical oxygen demand by high-pressure flowing injection |
| CN101571460A (en) * | 2009-06-18 | 2009-11-04 | 中国原子能科学研究院 | Sampling device for small-volume samples |
| CN202171545U (en) * | 2011-07-25 | 2012-03-21 | 迈瑞尔实验设备（上海）有限公司 | Online sampling system |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471874A (en) * | 2013-09-29 | 2013-12-25 | 国家电网公司 | Automatic quantitative sampling device for barreled steam turbine oil |
| CN103698445B (en) * | 2013-12-18 | 2016-04-13 | 迈瑞尔实验设备（上海）有限公司 | A kind of online micro sample collector and sampling analysis method |
| CN103698445A (en) * | 2013-12-18 | 2014-04-02 | 迈瑞尔实验设备（上海）有限公司 | Online micro sample collector and sampling analysis method |
| CN103728157A (en) * | 2013-12-25 | 2014-04-16 | 福建省邵武市永晶化工有限公司 | Sampling system of iodine pentafluoride or antimony fluoride |
| CN104075915A (en) * | 2014-07-22 | 2014-10-01 | 武汉市天虹仪表有限责任公司 | Vacuum pipeline system and method for gas sampling |
| CN104406824A (en) * | 2014-09-29 | 2015-03-11 | 泸州北方化学工业有限公司 | Method for sampling flammable and explosive gas under negative pressure |
| CN105004572A (en) * | 2015-07-27 | 2015-10-28 | 中国原子能科学研究院 | Automatic quantitative sampling device |
| CN107063778A (en) * | 2017-05-10 | 2017-08-18 | 张家港市华昌新材料科技有限公司 | A kind of online internal-circulation type enclosed sampling system and method for propylene |
| CN107063778B (en) * | 2017-05-10 | 2024-03-08 | 张家港市华昌新材料科技有限公司 | Propylene online internal circulation type closed sampling system and method |
| CN110608922A (en) * | 2019-09-10 | 2019-12-24 | 北京建筑大学 | Liquid sample vacuum collecting device and control method |
| CN110702475A (en) * | 2019-11-26 | 2020-01-17 | 怀化学院 | Gas sampling device and gas sampling method |
| CN115452483A (en) * | 2022-11-14 | 2022-12-09 | 胜利油田胜鑫防腐有限责任公司 | Sampling device and sampling method for petroleum detection |
| CN116754666A (en) * | 2023-05-24 | 2023-09-15 | 江苏省环境科学研究院 | In-situ rapid detection system for volatile organic pollutants in soil groundwater |
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Application publication date: 20120411 |