CN204142709U - Free radical dewaters mixing reaction unit - Google Patents
Free radical dewaters mixing reaction unit Download PDFInfo
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- CN204142709U CN204142709U CN201420627769.1U CN201420627769U CN204142709U CN 204142709 U CN204142709 U CN 204142709U CN 201420627769 U CN201420627769 U CN 201420627769U CN 204142709 U CN204142709 U CN 204142709U
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- tube
- mixing
- tube body
- free radical
- dewaters
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Abstract
The utility model provides a kind of free radical to dewater mixing reaction unit, and comprise drying tube, hybrid juction and chemical iodine device, drying tube is fixed on the front end of chemical iodine device, and hybrid juction is fixed on the rear end of chemical iodine device; Be formed with interior tube body and outer tube body in drying tube, interior tube body is that Nafion material is made; Hybrid juction comprises main draft tube, auxiliary inlet manifold and mixing tube, and main draft tube is communicated with mixing tube, and auxiliary inlet manifold is inserted in mixing tube; Chemistry iodine device comprises protecgulum, cylinder and bonnet, protecgulum offers two air admission holes, reaction chamber is formed in cylinder, the front end face of cylinder offers annular groove, multiple air flue be communicated with reaction chamber is offered in annular groove, protecgulum and annular groove form airtight annular housing, and air admission hole is communicated with annular housing; Interior tube body and main draft tube are tightly connected with reaction chamber respectively.Realize the measurement sensistivity and the measuring accuracy that improve free radical.
Description
Technical field
The utility model relates to a kind of gas-detecting device, particularly relates to a kind of free radical and to dewater mixing reaction unit.
Background technology
Air free radical is the important participant that troposphere atmospheric photochemistry is polluted, control the concentration level of most Atmospheric Trace chemical composition, spatial and temporal distributions and final home to return to, it is the main source of Fine Particles particle, raise with global greenhouse effect, acid rain, atmospheric oxidn level, environmental problem that Global climate change etc. is great is closely related, have very important impact to the atmospheric environment that the mankind depend on for existence.
Past 20, for many years field observation became a kind of important method studying air free radical.Because the chemical activity of air free radical is high, in the life-span short (<1 min), concentration low (pptv level), on-line determination air free radical is a very challenging job always.At present, peroxy radical chemistry amplifying method (peroxy radical measurement by chemical amplification, hereinafter referred to as: PERCA) be a kind of widely used air determining free radicals method, the method is under excessive NO, CO existent condition, by chain reaction, the free radical of low concentration is converted to the NO of high concentration
2, the multiple that the number of times of chain reaction namely amplifies, be otherwise known as chain length.In PERCA method, chain length is key parameter, and it decides sensitivity and the accuracy of this method, and the peroxy radical by measuring concentration known carries out demarcation to amplification system and obtains.But the existence of water can make the sensitivity of this method significantly reduce, and this phenomenon is called as water effect.Because water is one of gas composition that earth surface distribution is the widest, concentration is the highest, its levels variation range is in an atmosphere large, therefore water effect not only can reduce the sensitivity of PERCA method, also can affect the accuracy of measurement result, cause that the measurement sensistivity of free radical in prior art is poor and measuring accuracy is lower.
Summary of the invention
Technical problem to be solved in the utility model is: provide a kind of free radical to dewater mixing reaction unit, solve the poor and defect that measuring accuracy is lower of the measurement sensistivity of free radical in prior art, realizing improving measurement sensistivity and the measuring accuracy of free radical by the free radical mixing reaction unit that dewaters.
The technical scheme that the utility model provides is, a kind of free radical dewaters mixing reaction unit, comprise drying tube, hybrid juction and chemical iodine device, described drying tube is fixed on the front end of described chemical iodine device, and described hybrid juction is fixed on the rear end of described chemical iodine device; Be formed with interior tube body and outer tube body in described drying tube, described interior tube body is inserted in described outer tube body, and described interior tube body is that Nafion material is made; Hybrid juction comprises main draft tube, auxiliary inlet manifold and mixing tube, and described main draft tube is communicated with described mixing tube, and described auxiliary inlet manifold is inserted in described mixing tube; Described chemical iodine device comprises protecgulum, cylinder and bonnet, described protecgulum offers two air admission holes, reaction chamber is formed in described cylinder, the front end face of described cylinder offers annular groove, the air flue that multiple and described reaction chamber is communicated with is offered in described annular groove, the axes intersect of multiple described air flue forms a joint, described protecgulum is fixed on the front end of described cylinder, described protecgulum and described annular groove form airtight annular housing, described air admission hole is communicated with described annular housing, and described bonnet is fixed on the rear end of described cylinder; Described interior tube body and described main draft tube are tightly connected with described reaction chamber respectively.
Further, the two-port of described interior tube body is positioned at the both ends of the surface of described drying tube, and the two-port of described outer tube body is positioned on the sidewall of described drying tube.
Further, the Single port of described outer tube body is also connected with molecular sieve drying post, and described molecular sieve drying post is also connected with air compressor machine.
Further, described outer tube body is connected with described molecular sieve drying post near the port of described chemical iodine device.
Further, the axis being parallel of described auxiliary inlet manifold and described mixing tube, the axes normal of described main draft tube and described mixing tube.
Further, described protecgulum offers mounting hole, two described air admission holes are positioned at the both sides of described mounting hole, and the front end face of described cylinder offers the first threaded hole, and described drying tube to be inserted in described mounting hole and to be threaded in described first threaded hole.
Further, described bonnet offers the second threaded hole, and described main draft tube is threaded in described second threaded hole.
Further, described cylinder is evenly distributed with multiple described air flue around its axis.
Further, the joint of multiple described air flue axis is communicated with the port distance of described reaction chamber with described interior tube body is 5mm ~ 10mm.
The free radical that the utility model provides dewaters mixing reaction unit, the interior tube body made by Nafion material removes the moisture comprised in hydroxyl radical gas to be measured, but remain most hydroxyl radical gas simultaneously, thus eliminate the water effect problem existed in free-radical chemistry measurement by magnification, contribute to improving detection sensitivity and accuracy of detection; Simultaneously, the annular housing formed in chemistry iodine device can realize CO and NO and tentatively mix, and the gas in annular housing is blown in reaction chamber and at joint place by multiple air flue and carries out secondary mixing, thus make, CO and NO can mix to react with hydroxyl radical gas to be measured fully, reduce the loss of free radical in transport process, be more conducive to improving measuring accuracy.In addition, hybrid juction adopts hybrid mode design in the same way, is convenient to the rapid mixing of low discharge CO and large discharge hydroxyl radical gas, improves response speed during measurement pattern conversion, improves testing efficiency.Concentration change due to water can cause the change of chain length, and therefore the utility model also helps stability and the accuracy of free-radical chemistry measurement by magnification; Because the utility model just removes the moisture comprised in hydroxyl radical gas at free radical detection-phase, the error that the Numerical Methods therefore avoiding later stage water effect timing employing brings; In addition, the purge gas of the utility model China and foreign countries body comes from surrounding air, and therefore the utility model is very easy to realize in actual applications, with low costly but can obtain good effect.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is that the utility model free radical dewaters the schematic diagram of mixing reaction unit embodiment;
Fig. 2 is that the utility model free radical dewaters mixing reaction unit embodiment partial structurtes cut-open view.
Embodiment
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
As Figure 1-Figure 2, the present embodiment free radical dewaters mixing reaction unit, comprise drying tube 100, hybrid juction 200 and chemical iodine device 300, described drying tube 100 is fixed on the front end of described chemical iodine device 300, and described hybrid juction 200 is fixed on the rear end of described chemical iodine device 300, be formed with interior tube body 11 and outer tube body 12 in described drying tube 100, described interior tube body 11 is inserted in described outer tube body 12, and described interior tube body 11 is made for Nafion material, hybrid juction 200 comprises main draft tube 21, auxiliary inlet manifold 22 and mixing tube 23, and described main draft tube 21 is communicated with described mixing tube 23, and described auxiliary inlet manifold 22 is inserted in described mixing tube 23, described chemical iodine device 300 comprises protecgulum 32, cylinder 31 and bonnet 33, described protecgulum 32 offers two air admission holes 321, reaction chamber 310 is formed in described cylinder 31, the front end face of described cylinder 31 offers annular groove 311, the air flue 312 that multiple and described reaction chamber 310 is communicated with is offered in described annular groove 311, the axes intersect of multiple described air flue 312 forms a joint, described protecgulum 32 is fixed on the front end of described cylinder 31, described protecgulum 32 forms airtight annular housing with described annular groove 312, described air admission hole 321 is communicated with described annular housing, described bonnet 33 is fixed on the rear end of described cylinder 31, described interior tube body 11 and described main draft tube 21 are tightly connected with described reaction chamber 310 respectively.
Specifically, the drying tube 100 that the present embodiment free radical dewaters in mixing reaction unit is for transmitting and dry hydroxyl radical gas to be measured, hydroxyl radical gas to be measured transmits in interior tube body 11, and transmit in outer tube body 12 for the dry gas of drying hydroxyl radical gas to be measured, because interior tube body 11 is made up of Nafion material, to be transferred under the effect of the interior tube body 11 that the moisture in hydroxyl radical gas to be measured is made at Nafion material in outer tube body 12 and dry gas absorbs and takes out of, to realize remaining most hydroxyl radical gas while removing the most moisture comprised in hydroxyl radical gas to be measured, thus effectively reduce the water effect problem existed in free-radical chemistry measurement by magnification.After hydroxyl radical gas to be measured removes moisture, enter into the reaction chamber 310 of chemical iodine device 300, and NO and CO enters into reaction chamber 310 by corresponding air admission hole 321, NO and CO is introduced in annular housing by air admission hole 321 and mixes in advance, then, NO and CO gas in annular housing is injected in reaction chamber 310 through multiple air flue 312, because the axes intersect of multiple described air flue 312 forms a joint, NO and the CO mixed gas be injected in reaction chamber 310 is impacted mutually, thus NO and CO can be mixed more uniformly, ensure the NO added, CO gas and hydroxyl radical gas complete Homogeneous phase mixing in the extremely short time, more be conducive to hydroxyl radical gas and NO, the Quick uniform mixing of CO gas, reduce the loss of free radical in transport process, improve measuring accuracy.And hybrid juction adopts hybrid mode design in the same way, be convenient to the rapid mixing of low discharge CO and large discharge hydroxyl radical gas, be convenient to change detection pattern, improve response speed during measurement pattern conversion.Wherein, the internal diameter of interior tube body 11 is 1 ~ 3mm, and length is 10 ~ 30mm, can ensure the elimination effect of water, reduces the wall loss of free radical in interior tube body 11 in transport process simultaneously.And the two-port of described interior tube body 11 is positioned at the both ends of the surface of described drying tube 100, the two-port of described outer tube body 12 is positioned on the sidewall of described drying tube 100, hydroxyl radical gas only contacts with the tube wall of interior tube body 11 when flowing through drying tube 100, both improve the utilization factor of interior tube body 11, prevent again hydroxyl radical gas in the loss of the bulk material surface of drying tube 100, also avoid gas circuit produce reducing in joint thus have an impact to the flowing of hydroxyl radical gas.In addition, in chemistry iodine device 300 cylinder 31, the internal diameter of reaction chamber 310 is 19 ~ 21mm, much larger than the internal diameter of interior tube body 11, free radical air-flow enters the moment of reaction chamber 310 from interior tube body 11, can because reducing acts on the front end spaces formation micro-vacuum of reaction chamber 310 instantaneously, the vapour lock that NO, CO gas of free radical air-flow to low discharge avoiding large discharge produces at mixing point, is conducive to the Quick uniform mixing of gas.And the length of reaction chamber 310 is 300 ~ 500mm, thus ensure that the residence time of hydroxyl radical gas in reaction chamber 310 is greater than 3s, ensure carrying out completely of radical chain reaction.And, the axis being parallel of auxiliary inlet manifold 22 and described mixing tube 23, the axes normal of described main draft tube 21 and described mixing tube 23, realize hybrid juction 200 and adopt hybrid mode design in the same way, be convenient to the rapid mixing of low discharge CO and large discharge hydroxyl radical gas, improve response speed during measurement pattern conversion.
Further, the Single port of described outer tube body 12 is also connected with molecular sieve drying post 101, and described molecular sieve drying post 101 is also connected with air compressor machine 102.Concrete, outside air can directly be injected in molecular sieve drying post 101 by air compressor machine 102, forms dry air and directly enter into outer tube body 12 and carry out drying and process after molecular sieve drying post 101 processes, and with low costly but can obtain good effect.Preferably, outer tube body 12 is connected with described molecular sieve drying post 101 near the port of described chemical iodine device 300, and the flow direction realizing dry gas is contrary with the flow direction of hydroxyl radical gas to be measured, to improve drying efficiency and effect.
Further, described protecgulum 32 offers mounting hole (not shown), two described air admission holes 321 are positioned at the both sides of described mounting hole, the front end face of described cylinder 31 offers the first threaded hole (not shown), and described drying tube 100 to be inserted in described mounting hole and to be threaded in described first threaded hole.And bonnet 33 offers the second threaded hole (not shown), described main draft tube 21 is threaded in described second threaded hole, realizes drying tube 100, hybrid juction 200 and solid and reliable being connected and fixed of chemical iodine device 300.And cylinder 31 is evenly distributed with multiple described air flue 312 around its axis, the joint of multiple described air flue 312 axis is communicated with the port of described reaction chamber 310 apart from being 5mm ~ 10mm with described interior tube body 11, reasonably distance is mixed by arranging, the vapour lock that the free radical air-flow reducing large discharge when guaranteeing that NO and CO mixes on the one hand produces at mixing point, also makes hydroxyl radical gas with NO and CO, chemical reaction can occur timely and effectively on the other hand.
The present embodiment free radical dewater mixing reaction unit concrete use procedure as follows: wherein, hydroxyl radical gas to be detected is transported in interior tube body, and dry gas is transported in outer tube body, and mixing tube is connected with nitrogen dioxide measuring instrument; Concrete steps comprise:
Step 1, dry gas under the control of flowmeter with the outer tube body of the traffic flow drying pipe of 5 ~ 6L/min;
Step 2, background detection stage: CO is transported to auxiliary inlet manifold, NO is entered into annular housing by a wherein air admission hole of protecgulum and is entered into reaction chamber through air flue, and the signal that nitrogen dioxide measuring instrument detects is the NO in ambient atmosphere
2concentration;
Step 3, at free radical detection-phase: hydroxyl radical gas to be detected enters interior tube body with the flow velocity of 1 ~ 2L/min, CO changing flow direction enters into annular housing by another air admission hole of protecgulum, and CO, NO enter reaction chamber by air flue after annular housing carries out premixed;
Step 4, except the hydroxyl radical gas after water treatment is at the front end of reaction chamber and the rapid Homogeneous phase mixing of NO, CO gas that adds, there is chemical iodine and be converted to NO
2gas, the signal that now nitrogen dioxide measuring instrument detects is the NO in ambient atmosphere
2the NO produced with free radical iodine
2the total value of gas concentration;
Step 5, detect NO according to Nitrogen dioxide testing device
2the difference of gas concentration, converses the concentration values of free radical.
The free radical that the utility model provides dewaters mixing reaction unit, the interior tube body made by Nafion material removes the moisture comprised in hydroxyl radical gas to be measured, but remain most hydroxyl radical gas simultaneously, thus eliminate the water effect problem existed in free-radical chemistry measurement by magnification, contribute to improving detection sensitivity and accuracy of detection; Simultaneously, the annular housing formed in chemistry iodine device can realize CO and NO and tentatively mix, and the gas in annular housing is blown in reaction chamber and at joint place by multiple air flue and carries out secondary mixing, thus make, CO and NO can mix to react with hydroxyl radical gas to be measured fully, reduce the loss of free radical in transport process, be more conducive to improving measuring accuracy.In addition, hybrid juction adopts hybrid mode design in the same way, is convenient to the rapid mixing of low discharge CO and large discharge hydroxyl radical gas, improves response speed during measurement pattern conversion, improves testing efficiency.Concentration change due to water can cause the change of chain length, and therefore the utility model also helps stability and the accuracy of free-radical chemistry measurement by magnification; Because the utility model just removes the moisture comprised in hydroxyl radical gas at free radical detection-phase, the error that the Numerical Methods therefore avoiding later stage water effect timing employing brings; In addition, the purge gas of the utility model China and foreign countries body comes from surrounding air, and therefore the utility model is very easy to realize in actual applications, with low costly but can obtain good effect.
Last it is noted that above embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (9)
1. a free radical dewaters mixing reaction unit, it is characterized in that, comprise drying tube, hybrid juction and chemical iodine device, described drying tube is fixed on the front end of described chemical iodine device, and described hybrid juction is fixed on the rear end of described chemical iodine device; Be formed with interior tube body and outer tube body in described drying tube, described interior tube body is inserted in described outer tube body, and described interior tube body is that Nafion material is made; Hybrid juction comprises main draft tube, auxiliary inlet manifold and mixing tube, and described main draft tube is communicated with described mixing tube, and described auxiliary inlet manifold is inserted in described mixing tube; Described chemical iodine device comprises protecgulum, cylinder and bonnet, described protecgulum offers two air admission holes, reaction chamber is formed in described cylinder, the front end face of described cylinder offers annular groove, the air flue that multiple and described reaction chamber is communicated with is offered in described annular groove, the axes intersect of multiple described air flue forms a joint, described protecgulum is fixed on the front end of described cylinder, described protecgulum and described annular groove form airtight annular housing, described air admission hole is communicated with described annular housing, and described bonnet is fixed on the rear end of described cylinder; Described interior tube body and described main draft tube are tightly connected with described reaction chamber respectively.
2. free radical according to claim 1 dewaters mixing reaction unit, and it is characterized in that, the two-port of described interior tube body is positioned at the both ends of the surface of described drying tube, and the two-port of described outer tube body is positioned on the sidewall of described drying tube.
3. free radical according to claim 2 dewaters mixing reaction unit, and it is characterized in that, the Single port of described outer tube body is also connected with molecular sieve drying post, and described molecular sieve drying post is also connected with air compressor machine.
4. free radical according to claim 3 dewaters mixing reaction unit, and it is characterized in that, described outer tube body is connected with described molecular sieve drying post near the port of described chemical iodine device.
5. free radical according to claim 1 dewaters mixing reaction unit, it is characterized in that, the axis being parallel of described auxiliary inlet manifold and described mixing tube, the axes normal of described main draft tube and described mixing tube.
6. free radical according to claim 1 dewaters mixing reaction unit, it is characterized in that, described protecgulum offers mounting hole, two described air admission holes are positioned at the both sides of described mounting hole, the front end face of described cylinder offers the first threaded hole, and described drying tube to be inserted in described mounting hole and to be threaded in described first threaded hole.
7. free radical according to claim 1 dewaters mixing reaction unit, and it is characterized in that, described bonnet offers the second threaded hole, and described main draft tube is threaded in described second threaded hole.
8. free radical according to claim 1 dewaters mixing reaction unit, it is characterized in that, described cylinder is evenly distributed with multiple described air flue around its axis.
9. free radical according to claim 8 dewaters mixing reaction unit, it is characterized in that, the joint of multiple described air flue axis is communicated with described reaction chamber port distance with described interior tube body is 5mm ~ 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420627769.1U CN204142709U (en) | 2014-10-27 | 2014-10-27 | Free radical dewaters mixing reaction unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420627769.1U CN204142709U (en) | 2014-10-27 | 2014-10-27 | Free radical dewaters mixing reaction unit |
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| CN204142709U true CN204142709U (en) | 2015-02-04 |
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|---|---|---|---|
| CN201420627769.1U Withdrawn - After Issue CN204142709U (en) | 2014-10-27 | 2014-10-27 | Free radical dewaters mixing reaction unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267161A (en) * | 2014-10-27 | 2015-01-07 | 山东省科学院海洋仪器仪表研究所 | Free radical water removal uniform mixing reaction device and method |
-
2014
- 2014-10-27 CN CN201420627769.1U patent/CN204142709U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267161A (en) * | 2014-10-27 | 2015-01-07 | 山东省科学院海洋仪器仪表研究所 | Free radical water removal uniform mixing reaction device and method |
| CN104267161B (en) * | 2014-10-27 | 2015-12-02 | 山东省科学院海洋仪器仪表研究所 | Free radical dewaters and mixes reaction unit and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150204 Effective date of abandoning: 20151202 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20150204 Effective date of abandoning: 20151202 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |