CN204964468U - 2 grades of freezing total hydrocarbon analysis appearance of methane / non - methane of collecting of electron refrigeration - Google Patents
2 grades of freezing total hydrocarbon analysis appearance of methane / non - methane of collecting of electron refrigeration Download PDFInfo
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- CN204964468U CN204964468U CN201520776965.XU CN201520776965U CN204964468U CN 204964468 U CN204964468 U CN 204964468U CN 201520776965 U CN201520776965 U CN 201520776965U CN 204964468 U CN204964468 U CN 204964468U
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Abstract
The utility model relates to a 2 grades of freezing total hydrocarbon analysis appearance of methane / non - methane of collecting of electron refrigeration, including first solenoid valve, second solenoid valve, first electron pressure control valve, first collector, second collector etc, the utility model discloses a first collector freezes to set the temperature point separately with the second collector simultaneously, and appearance establishes ties to advance, with the total hydrocarbon of the non - methane in 2 collector simulataneous collection atmosphere, first collector loads the glass pearl, the second collector loads mixed adsorbent, it is not higher than 50 DEG C slowly to heat up first collector to, the high carbon compound that will stop in first collector further transfers to the second collector, first collector is stayed to water in the sample, the water in the sample is detached to physics, the efficiency of collection to the total hydrocarbon of non - methane is improved, methane is collected through first collector and the air traffic control in the second collector, isolate methane and the total hydrocarbon of non - methane through the methane post, utilize the FID detector to detect out respective concentration, the detection limit of the total hydrocarbon of its non - methane can reach inferior ppb level.
Description
Technical field
The utility model relates to the freezing collection methane/NMHC analyser of a kind of electronic cooling 2 grades.
Background technology
The company of current worldwide production methane/NMHC analyser has a lot, great majority are all adopt the blank pipe quantitative loop sample introduction such as (1 milliliter to 5 milliliters not), there is no enrichment function, survey the concentration requirement of methane and NMHC comparatively up to ppm level, the concentration of detection limit methane and NMHC is all 50ppb, and the accuracy of concentration lower detection data is lower; Small part company adopts the absorption of primary adsorption agent normal temperature, but normal temperature absorption is extremely weak for the organic adsorptive power of low-carbon (LC) of C2 to C6, but also is subject to the impact of atmospheric humidity, therefore promotes little to the detectability of NMHC, does not reach sub-ppb level.And along with the strict demand of Environmental pollution, just need the detectability promoting instrument, the discharge of strict Control pollution.
The disadvantage of existing methane/NMHC analyser is: the NMHC that ppm level concentration can only be detected, and the non-methane hydrocarbon emission for the even sub-ppb level of ppb level cannot detect, and is unfavorable for the control of atmospheric pollution.
Summary of the invention
For the problems referred to above, the utility model provides a kind of electronic cooling 2 grades freezing collection methane/NMHC analyser, and the utility model improves the detection limit of NMHC greatly.
In order to achieve the above object, the freezing collection methane/NMHC analyser of the utility model electronic cooling 2 grades, include the first solenoid valve, second solenoid valve, first electron pressure operation valve, first gatherer, second gatherer, multiport valve, pressure transducer, hydrogen flameionization detector, three-way solenoid valve, second electron pressure operation valve, 3rd electron pressure operation valve, needle-valve, mass flow controller, wherein the first solenoid valve is connected with the interface 3 of multiport valve with after the second solenoid valve parallel connection, first electron pressure operation valve is connected with the 5th interface of multiport valve, one end of first gatherer is connected with the 4th interface of multiport valve, the other end of the first gatherer is connected with one end of the second gatherer, the other end of the second gatherer is connected with the 1st interface of multiport valve, first gatherer and the series connection of the second gatherer, one end of pressure transducer is connected with the 2nd interface of multiport valve, the other end of pressure transducer is connected with the first interface of three-way solenoid valve, second interface of three-way solenoid valve is connected with one end of mass flow controller, 3rd interface of three-way solenoid valve is connected with needle-valve, the other end of mass flow controller is connected with vacuum pump interface, hydrogen flameionization detector is connected with the 7th interface of multiport valve, hydrogen flameionization detector is also connected with the second electron pressure operation valve and the 3rd electron pressure operation valve.
The utility model is compared with existing correlation technique, and the utility model has following beneficial effect:
The utility model is owing to employing cryogenic refrigeration technology, make to be greatly improved to the accumulation ability of volatile organic matter in air, it is made to reach sub-ppb level to the detectability of NMHC, improve the detectability of instrument to low concentration NMHC, the discharge of strict management and control contaminating enterprises, guarantees the strict improvement of atmospheric pollution.Effectively eliminate the water in sample simultaneously, remove in air to affect because of the change of humidity and detect the accurate of data.The utility model adopts the first gatherer and the second gatherer to be chilled to the temperature spot set separately simultaneously, the mode of series connection sample introduction, collect the NMHC in air with 2 gatherers simultaneously, first gatherer filling beaded glass, second gatherer filling mixed adsorbent, then the first gatherer is slowly warmed up to not higher than 50 DEG C, the higher carbon compounds rested in the first gatherer is transferred to the second gatherer further, water in sample stays the first gatherer, water in physics removing sample, improve the collection efficiency to NMHC, methane is collected by the blank pipe in the first gatherer and the second gatherer, methane and NMHC is isolated by methane post, fid detector is utilized to detect respective concentration, the detection limit of its NMHC can reach sub-ppb level.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of gas circuit that the utility model sample gas enters the first gatherer and the second gatherer;
Fig. 2 is that the higher carbon compounds be frozen in the first gatherer is transferred to the second gatherer by the utility model, the methane in blank pipe is transferred to the schematic diagram of gas circuit entering fid detector after methane isolated by methane post simultaneously;
Fig. 3 is that the NMHC in the second gatherer is transferred to the schematic diagram of gas circuit of methane post by the utility model;
To be the utility model enter fid detector by the NMHC in methane post through reverse blowout to Fig. 4, simultaneously by the schematic diagram of gas circuit of the first gatherer and the second gatherer HIGH TEMPERATURE PURGE;
Fig. 5 is the schematic diagram of gas circuit that the utility model electronic cooling 2 grades freezing TVOC total hydrocarbon analyser sample gas enters the first gatherer and the second gatherer;
Fig. 6 is the schematic diagram of gas circuit that the higher carbon compounds be frozen in the first gatherer is transferred to the second gatherer by the freezing TVOC total hydrocarbon analyser of the utility model electronic cooling 2 grades;
Fig. 7 is that the freezing TVOC total hydrocarbon analyser of the utility model electronic cooling 2 grades transfers to the schematic diagram of gas circuit of fid detector by being enriched in NMHC in the second gatherer;
Fig. 8 is the freezing TVOC total hydrocarbon analyser of the utility model electronic cooling 2 grades by the schematic diagram of gas circuit of the first gatherer and the second gatherer HIGH TEMPERATURE PURGE.
Embodiment
Below in conjunction with Figure of description, the utility model is further described.
Structural representation of the present utility model as shown in Figure 1, include the first solenoid valve 1, second solenoid valve 2, first electron pressure operation valve 3, first gatherer 4, second gatherer 5, multiport valve 6, pressure transducer 7, hydrogen flameionization detector 8, three-way solenoid valve 9, second electron pressure operation valve 10, 3rd electron pressure operation valve 11, needle-valve 13, mass flow controller 14, wherein the first solenoid valve 1 is connected with the interface 3 of multiport valve 6 with after the second solenoid valve 2 parallel connection, first electron pressure operation valve 3 is connected with the 5th interface of multiport valve 6, one end of first gatherer 4 is connected with the 4th interface of multiport valve 6, the other end of the first gatherer 4 is connected with one end of the second gatherer 5, the other end of the second gatherer 5 is connected with the 1st interface of multiport valve 6, one end of pressure transducer 7 is connected with the 2nd interface of multiport valve 6, the other end of pressure transducer 7 is connected with the first interface of three-way solenoid valve 9, second interface of three-way solenoid valve 9 is connected with one end of mass flow controller 14, 3rd interface of three-way solenoid valve 9 is connected with needle-valve 13, the other end of mass flow controller 14 is connected with vacuum pump interface, hydrogen flameionization detector 8 is connected with the 7th interface of multiport valve 6, hydrogen flameionization detector 8 is also connected with the second electron pressure operation valve 10 and the 3rd electron pressure operation valve 11, composition electronic cooling 2 grades freezing collection TVOC total hydrocarbon analyser.Adopt electronic cooling the first gatherer and the second gatherer to be chilled to during sample introduction simultaneously and be not less than-100 DEG C, and the mode of tandem, with the NMHC in 2 gatherers simultaneously Fractional Collections sample.
In the present embodiment, above-mentioned multiport valve 6 is also provided with the 6th interface and the 8th interface, and the 6th interface and the 8th interface are connected with the two ends of methane post 12, the freezing collection methane/NMHC analyser of composition electronic cooling 2 grades.
In the present embodiment, the air intake opening of above-mentioned first solenoid valve 1 is connected with nitrogen inlet, and the air intake opening of the second solenoid valve 2 is connected with sample feeding mouth.
In the present embodiment, the air intake opening of above-mentioned second electron pressure operation valve 10 is connected with hydrogen input port, and the air intake opening of the 3rd electron pressure operation valve 11 is connected with air-in.
In the present embodiment, above-mentioned needle-valve 13 is connected with evacuation port.
In the present embodiment, above-mentioned first gatherer 4 is the stainless-steel tube filling beaded glass composition of 1/8 or 1/4 inch with diameter.First gatherer 4 is for removing the water in sample.
In the present embodiment, above-mentioned second gatherer 5 is stainless-steel tube filled with adsorbent or the mixed adsorbent composition of 1/8 or 1/4 inch with diameter.
The utility model is chilled to the temperature spot of setting separately to the first gatherer 4 and the second gatherer 5 simultaneously, series connection sample introduction, mass flow controller 14 controls the size of sample introduction flow velocity, disposable use two gatherers are by NMHC Fractional Collections, can make like this adsorptive power of NMHC comparatively normal temperature promote 50 times, methane then rests in the blank pipe of the first gatherer 4 and the second gatherer 5, water in sample and the high higher carbon compounds of NMHC mid-boiling point are collected by the first gatherer 4, low-boiling low carbon compound is then by the sorbent collection in the second gatherer 5,
Sample introduction is complete, after pressure equilibrium, is warmed up to not higher than 50 DEG C by the first gatherer 4, rotates multiport valve 6, with carrier gas (high pure nitrogen), the higher carbon compounds in the first gatherer 4 is transferred to the second gatherer 5; Methane in blank pipe is transferred to methane post simultaneously and isolate methane, then enter fid detector.
After transfer, the second gatherer 5 is warmed up to not higher than 310 DEG C, with carrier gas (high pure nitrogen), NMHC is transferred to methane post 12, and then rotate multiport valve 6, the NMHC rested in methane post 12 being entered fid detector through oppositely blowing out, detecting the concentration of NMHC.First gatherer 4 and the second gatherer 5 are warmed up to not higher than 310 DEG C simultaneously, with high pure nitrogen cleaning, use in order to next sample introduction.
Specific embodiment of the utility model is as follows:
Embodiment 1
As shown in Figures 1 to 4, the freezing collection methane/NMHC analyser of the present embodiment electronic cooling 2 grades, first gatherer 4 and the second gatherer 5 are chilled to-30 DEG C simultaneously, during sample introduction, mass flow controller 14 coutroi velocity is 120ml/min, sampling volume is 200 milliliters, sample gas is first through the first gatherer 4, water wherein and NMHC medium high carbon compound are chilled in the beaded glass of the first gatherer 4 on the surface, in NMHC, low carbon compound enters the second gatherer 5 by adsorbent, methane then rests in the blank pipe of the first gatherer 4 and the second gatherer 5, as shown in Figure 1.
Sample introduction is complete, after pressure equilibrium, the temperature of the first gatherer 4 is raised to 10 DEG C, rotate multiport valve, with carrier gas (high pure nitrogen), the higher carbon compounds of gasification in the first gatherer 4 is transferred to the second gatherer 5, water is stayed the first gatherer 4, complete the water in removing sample, methane in blank pipe is transferred to after methane isolated by methane post simultaneously and enter fid detector, detect the concentration of methane.As shown in Figure 2.
After transfer, the second gatherer 5 is warmed up to 250 DEG C, with carrier gas (high pure nitrogen), NMHC is transferred to methane post.As shown in Figure 3.
And then rotate multiport valve 6, the NMHC rested in methane post being entered fid detector through oppositely blowing out, detecting the concentration of NMHC.First gatherer 4 and the second gatherer 5 are warmed up to 250 DEG C simultaneously, with high pure nitrogen cleaning, use in order to next sample introduction.As shown in Figure 4.
Embodiment 2
As shown in Fig. 5 to 8, the utility model also can change eight logical valves into six-way valve, remove methane post, so just become electronic cooling 2 grades freezing collection TVOC total hydrocarbon analyser, equally the first gatherer 3 is chilled to-20 DEG C, second gatherer 4 is chilled to-30 DEG C, during sample introduction, mass flow controller 10 coutroi velocity is 100ml/min, sampling volume is 400 milliliters, sample gas is first through the first gatherer 3, water wherein and TVOC total hydrocarbon medium high carbon compound are chilled in the beaded glass of the first gatherer 3 on the surface, in TVOC total hydrocarbon, low carbon compound enters the second gatherer 4 by adsorbent, as shown in Figure 5.
Rotate multiport valve 5 after sample introduction, the first gatherer 3 is warmed up to 10 DEG C, the second gatherer 4 continues to keep freezing-30 DEG C, with carrier gas (high pure nitrogen), the higher carbon compounds of gasification in the first gatherer 3 is transferred to the second gatherer 4, as shown in Figure 6.
After transfer, the second gatherer 4 is warmed up to 250 DEG C, with carrier gas (high pure nitrogen), the TVOC total hydrocarbon be enriched in the second gatherer 4 is transferred to the concentration that fid detector detects TVOC total hydrocarbon, as shown in Figure 7.
After TVOC total hydrocarbon goes out peak, rotate multiport valve 5, the first gatherer 3 is warmed up to 150 DEG C, and the second gatherer 4 is warmed up to 250 DEG C, with nitrogen purge first gatherer 3 and the second gatherer 4, uses, as shown in Figure 8 when getting secondary sample introduction ready.
In the various embodiments described above, adopt electronic cooling technology, described first gatherer, described second gatherer are chilled to and are not less than-100 DEG C.
In the various embodiments described above, adopt the temperature spot the first gatherer and the second gatherer being chilled to simultaneously and setting separately during sample introduction, and the mode of tandem, with the NMHC in 2 gatherers simultaneously Fractional Collections sample, utilizes the water in the first gatherer removing sample.
The utility model be should be understood that, above-described embodiment, to the purpose of this utility model, technical scheme and beneficial effect have carried out further detailed description, these are only embodiment of the present utility model, and be not used in restriction the utility model, every within spiritual principles of the present utility model, done any amendment, equivalent replacement, improve, all should be included within protection domain of the present utility model, such as: the change of chilling temperature point, the replacement of freezing mode, multiport valve is made into other valve, make the stainless-steel tube of gatherer into glass tube or other pipe etc.The protection domain that protection domain of the present utility model should define with claim is as the criterion.
Claims (7)
1. an electronic cooling 2 grades of freezing collection methane/NMHC analysers, it is characterized in that including the first solenoid valve, second solenoid valve, first electron pressure operation valve, first gatherer, second gatherer, multiport valve, pressure transducer, hydrogen flameionization detector, three-way solenoid valve, second electron pressure operation valve, 3rd electron pressure operation valve, needle-valve, mass flow controller, wherein the first solenoid valve is connected with the interface 3 of multiport valve with after the second solenoid valve parallel connection, first electron pressure operation valve is connected with the 5th interface of multiport valve, one end of first gatherer is connected with the 4th interface of multiport valve, the other end of the first gatherer is connected with one end of the second gatherer, the other end of the second gatherer is connected with the 1st interface of multiport valve, first gatherer and the series connection of the second gatherer, one end of pressure transducer is connected with the 2nd interface of multiport valve, the other end of pressure transducer is connected with the first interface of three-way solenoid valve, second interface of three-way solenoid valve is connected with one end of mass flow controller, 3rd interface of three-way solenoid valve is connected with needle-valve, the other end of mass flow controller is connected with vacuum pump interface, hydrogen flameionization detector is connected with the 7th interface of multiport valve, hydrogen flameionization detector is also connected with the second electron pressure operation valve and the 3rd electron pressure operation valve.
2. the freezing collection methane/NMHC analyser of electronic cooling according to claim 12 grades, it is characterized in that above-mentioned multiport valve is also provided with the 6th interface and the 8th interface, the 6th interface and the 8th interface are connected with the two ends of methane post.
3. the freezing collection methane/NMHC analyser of electronic cooling according to claim 12 grades, it is characterized in that the air intake opening of above-mentioned first solenoid valve is connected with nitrogen inlet, the air intake opening of the second solenoid valve is connected with sample feeding mouth.
4. the freezing collection methane/NMHC analyser of electronic cooling according to claim 12 grades, it is characterized in that the air intake opening of above-mentioned second electron pressure operation valve is connected with hydrogen input port, the air intake opening of the 3rd electron pressure operation valve is connected with air-in.
5. the freezing collection methane/NMHC analyser of electronic cooling according to claim 12 grades, is characterized in that above-mentioned needle-valve is connected with evacuation port.
6. the freezing collection methane/NMHC analyser of electronic cooling according to claim 12 grades, is characterized in that above-mentioned first gatherer diameter is the stainless-steel tube filling beaded glass composition of 1/8 or 1/4 inch.
7. the freezing collection methane/NMHC analyser of electronic cooling according to claim 12 grades, is characterized in that above-mentioned second gatherer diameter is stainless-steel tube filled with adsorbent or the mixed adsorbent composition of 1/8 or 1/4 inch.
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| CN201520776965.XU CN204964468U (en) | 2015-09-30 | 2015-09-30 | 2 grades of freezing total hydrocarbon analysis appearance of methane / non - methane of collecting of electron refrigeration |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717065A (en) * | 2016-04-07 | 2016-06-29 | 南京波腾科技工程有限公司 | Continuous monitoring device for non-methane total hydrocarbon and working method of continuous monitoring device |
| CN106018590A (en) * | 2016-05-13 | 2016-10-12 | 国家海洋局第三海洋研究所 | Device and method for determining dissolved methane in water |
| CN108088921A (en) * | 2017-12-12 | 2018-05-29 | 优泰科技（深圳）有限公司 | VOC on-line computing models |
| CN109490443A (en) * | 2018-12-21 | 2019-03-19 | 浙江全世科技有限公司 | A kind of non-methane total hydrocarbons content detection device and method |
| CN109752440A (en) * | 2017-11-08 | 2019-05-14 | 中国石油化工股份有限公司 | A kind of total hydrocarbon concentration detector and its application and total hydrocarbon concentration measuring method |
-
2015
- 2015-09-30 CN CN201520776965.XU patent/CN204964468U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717065A (en) * | 2016-04-07 | 2016-06-29 | 南京波腾科技工程有限公司 | Continuous monitoring device for non-methane total hydrocarbon and working method of continuous monitoring device |
| CN106018590A (en) * | 2016-05-13 | 2016-10-12 | 国家海洋局第三海洋研究所 | Device and method for determining dissolved methane in water |
| CN109752440A (en) * | 2017-11-08 | 2019-05-14 | 中国石油化工股份有限公司 | A kind of total hydrocarbon concentration detector and its application and total hydrocarbon concentration measuring method |
| CN108088921A (en) * | 2017-12-12 | 2018-05-29 | 优泰科技（深圳）有限公司 | VOC on-line computing models |
| CN109490443A (en) * | 2018-12-21 | 2019-03-19 | 浙江全世科技有限公司 | A kind of non-methane total hydrocarbons content detection device and method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180809 Address after: 201107 DF154 twenty-second, 1-30 Lane 88, min Bei Road, Minhang District, Shanghai. Patentee after: Shanghai green Hui Environmental Protection Technology Co., Ltd. Address before: 510520 161 Tianhe District Guang Long Dong campus, Ying Long Road, Tianhe District, Guangzhou, Guangdong Patentee before: Li Kan |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201224 Address after: No.228 Dayawan Avenue, Dayawan West District, Huizhou City, Guangdong Province Patentee after: Li Kan Address before: 201107 DF154 twenty-second, 1-30 Lane 88, min Bei Road, Minhang District, Shanghai. Patentee before: Shanghai green Hui Environmental Protection Technology Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210729 Address after: 2 / F, Longxing Road, Dayawan West District, Huizhou, Guangdong 516000 Patentee after: Guangdong Antaike Technology Co.,Ltd. Address before: No.228 Dayawan Avenue, Dayawan West District, Huizhou City, Guangdong Province Patentee before: Li Kan |