CN113945659A - Gas path operation adjusting method for rapid thermal cracking RoHS detector - Google Patents
Gas path operation adjusting method for rapid thermal cracking RoHS detector Download PDFInfo
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- CN113945659A CN113945659A CN202111193703.7A CN202111193703A CN113945659A CN 113945659 A CN113945659 A CN 113945659A CN 202111193703 A CN202111193703 A CN 202111193703A CN 113945659 A CN113945659 A CN 113945659A
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- valve
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- back flushing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/16—Injection
- G01N30/20—Injection using a sampling valve
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/16—Injection
- G01N30/20—Injection using a sampling valve
- G01N2030/201—Injection using a sampling valve multiport valves, i.e. having more than two ports
Abstract
The invention discloses a gas path operation adjusting method of a rapid thermal cracking RoHS detector, wherein a gas path of the detector comprises a cracking part and a gas path adjusting system, the gas path adjusting system comprises an electromagnetic valve, an adjusting valve and an EPC (electronic product code) control part, and the EPC control part controls the flowing direction and the flowing speed of sample gas in the gas path adjusting system by controlling the on-off of the electromagnetic valve and the adjusting valve; the operation adjusting method comprises a preparation and ready process, a sample feeding process and a back flushing process; the invention can adjust the regulating valve group during thermal cracking detection to regulate the concentration of the sample gas; opening after the thermal cracking finishes through the break-make of solenoid valve group, use the air current blowback to greatly reduce sample gas residual value, guarantee the accuracy and the stability of testing result, and connected mode is succinct, convenient debugging, stability that can effectual improvement product, and the effectual degree of difficulty that reduces production and debug.
Description
Technical Field
The invention relates to the field of analytical instruments, in particular to a gas path operation adjusting method for a rapid thermal cracking RoHS detector.
Background
The working principle of the rapid thermal cracking RoHS detector is that a sample to be detected is rapidly cracked into gas in a high-temperature cracking system, then the gas is carried into a gas chromatography unit by carrier gas, and is separated by a capillary chromatographic column and then is subjected to qualitative and quantitative analysis by a hydrogen Flame Ionization Detector (FID).
However, in the conventional technology, a gas path connection mode adopted by the conventional technology can cause sample gas to remain after the test is completed, so that the detection value of the gas chromatography detector is deviated, and the system stability is deteriorated. On the other hand, the irregular connection of the internal gas circuit can cause great individual difference of products, the debugging is complex, the production efficiency is low, and therefore a new mode and a new method need to be found.
Disclosure of Invention
The invention aims to at least solve one of the technical problems in the prior art, and provides a gas path operation adjusting method of a rapid thermal cracking RoHS detector, wherein a gas path of the detector comprises a cracking part and a gas path adjusting system, the gas path adjusting system comprises an electromagnetic valve, an adjusting valve and an EPC control part, and the EPC control part controls the flow direction and the flow rate of sample gas in the gas path adjusting system by controlling the on-off of the electromagnetic valve and the adjusting valve;
the operation adjustment method comprises the following steps of,
preparing and preparing, wherein the parameters of the cracking component and the component in the gas chromatograph reach set values, the gas chromatograph is in a ready state, the cracking component reaches a ready state for sample injection at any time, the EPC control component controls the carrier gas valve to be opened, other valves are closed, and carrier gas enters the sample injection port of the gas chromatograph from the carrier gas valve;
the sample introduction process is carried out, the gas chromatograph starts to introduce samples after the preparation and ready processes are stable, the cracking component is heated and cracked according to a preset program, the EPC control component controls the switching valve to be opened, other valves are closed, and the carrier gas enters the cracking component from the switching valve and carries the substance to be detected in the cracking component to enter a sample inlet; if the diversion is needed, the EPC control component controls a diversion valve to open, and part of the carrier gas carries part of the sample gas to be exhausted through the diversion valve;
a back flushing process, wherein after the sample injection process is finished, back flushing operation is performed on the cracking component, the cracking component is kept at a constant temperature, the EPC control component controls the gas carrying valve and the back flushing valve to be opened, other valves are closed, the carrier gas flows to the gas carrying valve and then is divided, one path of the carrier gas enters the gas chromatograph from the sample injection port, and the other path of the carrier gas passes through the cracking component and then is discharged to the back flushing valve;
and (4) ending the process, namely ending the back flushing process, cooling the cracking component, closing the back flushing valve, and enabling the whole equipment to enter a standby or closed state.
By the gas circuit operation adjusting method of the rapid thermal cracking RoHS detector, the adjusting valve group can be adjusted during thermal cracking detection to adjust the concentration of the sample gas; opening after the thermal cracking finishes through the break-make of solenoid valve group, use the air current blowback to greatly reduce sample gas residual value, guarantee the accuracy and the stability of testing result, and connected mode is succinct, convenient debugging, stability that can effectual improvement product, and the effectual degree of difficulty that reduces production and debug.
In addition, the gas circuit operation adjusting method of the rapid thermal cracking RoHS detector disclosed by the invention also has the following additional technical characteristics:
furthermore, in the preparation and ready process, the sample injection process and the back flushing process, the carrier gas enters the next link after being subjected to flow control through the EPC control part and the throttle valve.
Furthermore, the gas path regulating system comprises an EPC control component, the rear side of the EPC control component is respectively connected with the gas carrying valve and the switching valve, one path of gas carrying valve is connected with the sample inlet of the gas chromatograph, and the other path of gas carrying valve is connected with the output end of the cracking component; one path behind the switching valve is connected with the input end of the cracking component, the other path is connected with the back end of the back flushing valve, the output end of the cracking component, the other path is connected with the back end of the air carrying valve and the sample inlet, the other path is connected with the flow dividing valve, and the flow dividing valve and the back end of the back flushing valve are connected with the emptying end.
Furthermore, a throttle valve and a soap film flowmeter are further arranged between the rear ends of the flow dividing valve and the blowback valve and the emptying end.
Furthermore, a throttle valve and a pressure gauge connected to the throttle valve are connected to the EPC control unit, and the pneumatic valve and the switching valve are connected to the throttle valve, respectively.
Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of the preparation and readiness process of the present invention;
FIG. 2 is a schematic view of the sample injection process of the present invention;
FIG. 3 is a schematic diagram of a blowback process of the present invention;
the device comprises an EPC control part 1, a throttle valve 2, a pressure gauge 3, an air valve 4, a switching valve 5, a cracking chamber 6, a shunt valve 7, a blowback valve 8, a shunt throttle valve 9, a soap film flowmeter 10, an A sample inlet and a B emptying port, wherein the arrow direction indicates the flow direction, and vertical lines on two sides in the figure are demarcation schematic lines.
Detailed Description
The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
According to the embodiment of the invention, the invention provides a gas path operation adjusting method of a rapid thermal cracking RoHS detector, wherein a gas path of the detector comprises a cracking part and a gas path adjusting system, the gas path adjusting system comprises an electromagnetic valve, an adjusting valve and an EPC (electronic product code) control part, and the EPC control part controls the flowing direction and the flowing speed of sample gas in the gas path adjusting system by controlling the on-off of the electromagnetic valve and the adjusting valve;
the operation adjustment method comprises the following steps of,
preparing and preparing, wherein the parameters of the cracking component and the component in the gas chromatograph reach set values, the gas chromatograph is in a ready state, the cracking component reaches a ready state for sample injection at any time, the EPC control component controls the carrier gas valve to be opened, other valves are closed, and carrier gas enters the sample injection port of the gas chromatograph from the carrier gas valve;
the sample introduction process is carried out, the gas chromatograph starts to introduce samples after the preparation and ready processes are stable, the cracking component is heated and cracked according to a preset program, the EPC control component controls the switching valve to be opened, other valves are closed, and the carrier gas enters the cracking component from the switching valve and carries the substance to be detected in the cracking component to enter a sample inlet; if the diversion is needed, the EPC control component controls a diversion valve to open, and part of the carrier gas carries part of the sample gas to be exhausted through the diversion valve;
a back flushing process, wherein after the sample injection process is finished, back flushing operation is performed on the cracking component, the cracking component is kept at a constant temperature, the EPC control component controls the gas carrying valve and the back flushing valve to be opened, other valves are closed, the carrier gas flows to the gas carrying valve and then is divided, one path of the carrier gas enters the gas chromatograph from the sample injection port, and the other path of the carrier gas passes through the cracking component and then is discharged to the back flushing valve;
and (4) ending the process, namely ending the back flushing process, cooling the cracking component, closing the back flushing valve, and enabling the whole equipment to enter a standby or closed state. The electromagnetic valve and the regulating valve comprise a throttle valve, a gas carrying valve, a switching valve, a flow dividing valve, a back flushing valve and the like.
According to some embodiments of the present invention, in the preparing and ready process, the sample feeding process and the back flushing process, the carrier gas enters the next link after being subjected to flow control through the EPC control unit and the throttle valve.
According to some embodiments of the present invention, the gas path adjusting system includes an EPC control component, a rear side of the EPC control component is connected to the gas carrying valve and the switching valve, respectively, one path of the rear side of the gas carrying valve is connected to the sample inlet of the gas chromatograph, and the other path of the rear side of the gas carrying valve is connected to an output end of the cracking component; one path behind the switching valve is connected with the input end of the cracking component, the other path is connected with the back end of the back flushing valve, the output end of the cracking component, the other path is connected with the back end of the air carrying valve and the sample inlet, the other path is connected with the flow dividing valve, and the flow dividing valve and the back end of the back flushing valve are connected with the emptying end.
According to some embodiments of the invention, a throttle valve and a soap film flow meter are further included between the diverter valve and the back end of the blowback valve and the drain end.
According to one embodiment of the invention, the EPC control unit is connected with a throttle valve and a pressure gauge connected with the throttle valve, and the throttle valve is connected with the gas carrying valve and the switching valve respectively.
While a bench top embodiment of the hydraulic servo system of the present invention has been shown and described, those of ordinary skill in the art will understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (5)
1. A gas circuit operation adjusting method for a rapid thermal cracking RoHS detector is characterized by comprising the following steps: the gas path of the detector comprises a cracking component and a gas path adjusting system, the gas path adjusting system comprises an electromagnetic valve, an adjusting valve and an EPC control component, and the EPC control component controls the flowing direction and the flowing speed of the sample gas in the gas path adjusting system by controlling the on-off of the electromagnetic valve and the adjusting valve;
the operation adjustment method comprises the following steps of,
preparing and preparing, wherein the parameters of the cracking component and the component in the gas chromatograph reach set values, the gas chromatograph is in a ready state, the cracking component reaches a ready state for sample injection at any time, the EPC control component controls the carrier gas valve to be opened, other valves are closed, and carrier gas enters the sample injection port of the gas chromatograph from the carrier gas valve;
the sample introduction process is carried out, the gas chromatograph starts to introduce samples after the preparation and ready processes are stable, the cracking component is heated and cracked according to a preset program, the EPC control component controls the switching valve to be opened, other valves are closed, and the carrier gas enters the cracking component from the switching valve and carries the substance to be detected in the cracking component to enter a sample inlet; if the diversion is needed, the EPC control component controls a diversion valve to open, and part of the carrier gas carries part of the sample gas to be exhausted through the diversion valve;
a back flushing process, wherein after the sample injection process is finished, back flushing operation is performed on the cracking component, the cracking component is kept at a constant temperature, the EPC control component controls the gas carrying valve and the back flushing valve to be opened, other valves are closed, the carrier gas flows to the gas carrying valve and then is divided, one path of the carrier gas enters the gas chromatograph from the sample injection port, and the other path of the carrier gas passes through the cracking component and then is discharged to the back flushing valve;
and (4) ending the process, namely ending the back flushing process, cooling the cracking component, closing the back flushing valve, and enabling the whole equipment to enter a standby or closed state.
2. The method of claim 1, wherein in the process of preparation and readiness, the process of sample introduction, and the process of back flushing, the carrier gas is controlled by the EPC control part and the throttle valve and then enters the next step.
3. The RoHS detector gas path operation adjusting method according to claim 1, wherein said gas path adjusting system comprises an EPC control unit, wherein a rear side of said EPC control unit is connected to said gas carrying valve and said switching valve, respectively, and one path of said gas carrying valve is connected to said sample inlet of said gas chromatograph and the other path is connected to an output terminal of said cracking unit; one path behind the switching valve is connected with the input end of the cracking component, the other path is connected with the back end of the back flushing valve, the output end of the cracking component, the other path is connected with the back end of the air carrying valve and the sample inlet, the other path is connected with the flow dividing valve, and the flow dividing valve and the back end of the back flushing valve are connected with the emptying end.
4. The method of claim 3 wherein a throttle valve and a soap film flow meter are included between said splitter valve and said back end of said back flushing valve and said drain end.
5. The method of claim 3, wherein the EPC control unit is connected to a throttle valve and a pressure gauge connected to the throttle valve, and the throttle valve is connected to the gas carrying valve and the switching valve.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111193703.7A CN113945659A (en) | 2021-10-13 | 2021-10-13 | Gas path operation adjusting method for rapid thermal cracking RoHS detector |
| PCT/CN2021/142537 WO2023060776A1 (en) | 2021-10-13 | 2021-12-29 | Operation regulating method for gas path of rapid thermal cracking rohs detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111193703.7A CN113945659A (en) | 2021-10-13 | 2021-10-13 | Gas path operation adjusting method for rapid thermal cracking RoHS detector |
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| Publication Number | Publication Date |
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| CN113945659A true CN113945659A (en) | 2022-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111193703.7A Pending CN113945659A (en) | 2021-10-13 | 2021-10-13 | Gas path operation adjusting method for rapid thermal cracking RoHS detector |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113945659A (en) |
| WO (1) | WO2023060776A1 (en) |
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| CN102192959A (en) * | 2010-03-11 | 2011-09-21 | 上海市计算技术研究所 | Thermal cracker, thermal cracking gas chromatograph and thermal cracking analysis method |
| CN203324236U (en) * | 2013-06-05 | 2013-12-04 | 中国石油天然气股份有限公司 | Carrier gas path of mini furnace cracker and gas chromatograph |
| CN209707223U (en) * | 2019-03-20 | 2019-11-29 | 汇谱分析仪器制造河北有限公司 | A kind of full-automatic heat desorption instrument |
| CN211627463U (en) * | 2019-12-30 | 2020-10-02 | 江苏春潮科技发展有限公司 | Online thermal desorption gas circuit system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH06109713A (en) * | 1992-09-30 | 1994-04-22 | Yokogawa Electric Corp | Process gas chromatograph |
| DE19703452A1 (en) * | 1996-02-29 | 1997-09-04 | Hewlett Packard Co | System for interfacing sample preparation devices with a chromatograph |
| CN102735786B (en) * | 2012-06-04 | 2014-04-16 | 云南烟草科学研究院 | Online trapping and analyzing method for benzo[a]pyrene in thermal cracking products, and apparatus thereof |
| CN216350530U (en) * | 2021-10-13 | 2022-04-19 | 江苏天瑞仪器股份有限公司 | Rapid thermal cracking RoHS detector gas circuit operation structure |
-
2021
- 2021-10-13 CN CN202111193703.7A patent/CN113945659A/en active Pending
- 2021-12-29 WO PCT/CN2021/142537 patent/WO2023060776A1/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3703355A (en) * | 1971-12-10 | 1972-11-21 | Envirotech Corp | Pyrolysis and analysis system |
| CN2874493Y (en) * | 2005-08-26 | 2007-02-28 | 上海华爱色谱分析技术有限公司 | Self cleaning type pyrolysis device |
| CN102192959A (en) * | 2010-03-11 | 2011-09-21 | 上海市计算技术研究所 | Thermal cracker, thermal cracking gas chromatograph and thermal cracking analysis method |
| CN203324236U (en) * | 2013-06-05 | 2013-12-04 | 中国石油天然气股份有限公司 | Carrier gas path of mini furnace cracker and gas chromatograph |
| CN209707223U (en) * | 2019-03-20 | 2019-11-29 | 汇谱分析仪器制造河北有限公司 | A kind of full-automatic heat desorption instrument |
| CN211627463U (en) * | 2019-12-30 | 2020-10-02 | 江苏春潮科技发展有限公司 | Online thermal desorption gas circuit system |
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| WO2023060776A1 (en) | 2023-04-20 |
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