CN205620188U - Vacuum generator and dilution sample thief - Google Patents
Vacuum generator and dilution sample thief Download PDFInfo
- Publication number
- CN205620188U CN205620188U CN201620302014.3U CN201620302014U CN205620188U CN 205620188 U CN205620188 U CN 205620188U CN 201620302014 U CN201620302014 U CN 201620302014U CN 205620188 U CN205620188 U CN 205620188U
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- Prior art keywords
- vacuum generator
- laval nozzle
- carrier gas
- gas
- entrance
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Abstract
The utility model discloses a vacuum generator, including the reaction chamber, locate a laval nozzle in the reaction chamber, surround the third lateral wall of reaction chamber and locate the second carrier gas entry on the third lateral wall, the flue gas entry, second carrier gas entry links to each other with a laval nozzle's entry, the side of a laval nozzle export is located to the flue gas entry, this vacuum generator is through using the different steerable not flue gases of commensurability of drawing of a laval nozzle, thereby can realize absorbing a small amount of flue gas, alleviate the workload of equipment, and extend the service life of the equipment, the utility model also discloses a dilute the sample thief of using above -mentioned vacuum generator.
Description
Technical field
This utility model relates to detection field, particularly relates to a kind of vacuum generator and dilution sampling device.
Background technology
Dilution sampling device is mainly used in CEMS system, for gathering flue gas and diluting generation sample gas for detecting, and CEMS system refers to that the gaseous contaminant to air pollution emission and particulate matter carry out concentration and the device of total emission volumn continuous detecting, dilution sampling device includes sampling tube, sampler chamber and generator, the generator of existing dilution sampling device is only diluted reaction, but the exhaust gas volumn sucked can not be controlled, may cause extracting a large amount of flue gases from flue, cause filtering work difficulty to increase, the live load of equipment is big, causes shorten the service life of equipment.
Utility model content
In view of this, it is necessary in fact to provide a kind of vacuum generator, can control to draw a small amount of flue gas and be diluted reaction, alleviate the live load of equipment, the service life of extension device.
A kind of vacuum generator, it is applied to dilute harvester, and connect with the sampler chamber of described dilution harvester, described vacuum generator includes reaction chamber, the Laval nozzle being located in described reaction chamber, surrounds the 3rd sidewall of described reaction chamber and be located at the second carrier gas entrance on described 3rd sidewall, smoke inlet, described second carrier gas entrance is connected with the entrance of described Laval nozzle, and described smoke inlet is located at the side of described Laval nozzle outlet.
Preferably, described reaction chamber includes that low-pressure area, described low-pressure area are to be formed after the carrier gas entered from described second carrier gas entrance passes through described Laval nozzle, and described smoke inlet is positioned at described low-pressure area.
Preferably, described Laval nozzle includes contraction section and diffuser, and the pressure size of described low-pressure area is relevant to the shape of described Laval nozzle minimum diameter and described contraction section and described diffuser.
Preferably, described vacuum generator also includes being located at the anemostat below described Laval nozzle, and described smoke inlet is positioned at the outlet of described Laval nozzle and the side of described anemostat entrance.
Preferably, the sample gas outlet that described vacuum generator also includes being located on described 3rd sidewall, described sample gas outlet just outlet to described anemostat.
Preferably, described second carrier gas entrance, the passage of described Laval nozzle, the passage of described anemostat and the outlet of described sample gas are located along the same line.
Preferably, described vacuum generator also includes the gas entrance being located at described 3rd sidewall, and gas enters described vacuum generator by described gas entrance.
Preferably, described gas entrance and described smoke inlet are symmetrical relative to described Laval nozzle.
Preferably, described vacuum generator also includes the vacuum measurement hole being located on described 3rd sidewall, and described vacuum measurement hole for detecting the vacuum size in described vacuum generator for detecting instrument.
A kind of dilution sampling device, including any of the above-described dilution sampling room.
Above-mentioned vacuum generator utilizes the carrier gas that Laval nozzle compression enters from the second carrier gas entrance, thus form the flue gas that certain vacuum degree is drawn, by using different Laval nozzles can control to draw different amounts of flue gas, thus can realize drawing a small amount of flue gas and be diluted reaction, alleviate the live load of equipment, the service life of extension device.
Accompanying drawing explanation
The structural representation of the dilution sampling device that Fig. 1 provides for this utility model embodiment.
The generalized section of the dilution sampling device that Fig. 2 provides for this utility model embodiment.
The structural representation of the sampling tube of the dilution sampling device that Fig. 3 provides for another embodiment of this utility model.
The structural representation of the sampler chamber of the dilution sampling device that Fig. 4 provides for this utility model embodiment.
The structural representation of the vacuum generator of the dilution sampling device that Fig. 5 provides for this utility model embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in embodiment is carried out clear, complete description.
Refer to Fig. 1, the structural representation of the dilution sampling device that this utility model provides, as shown in the figure, dilution sampling device 1 includes the sampler chamber 3 that sampling tube 2 connects and the vacuum generator 4 connected with sampler chamber 3 with sampling tube 2, wherein sampler chamber 3 is located between sampling tube 2 and vacuum generator 4, flue gas flows to sampler chamber 3 and vacuum generator 4 successively from sampling tube 2, and is diluted reaction in vacuum generator 4.
Refer to Fig. 2, the profile of dilution sampling device, as it can be seen, sampling tube 2 connects with flue 5, for gathering the flue gas in flue 5.Sampling tube 2 includes diversion cavity 21, surrounds the first side wall 22 of diversion cavity 21, the dividing plate 23 being located in diversion cavity 21 and the first exhanst gas outlet 24 being arranged on the first side wall 22.Wherein, sampling tube 2 is connected with sampler chamber 3 by the first exhanst gas outlet 24；Diversion cavity 21 is divided into the first flow-guiding channel the 25, the 3rd flow-guiding channel 26 and the second flow-guiding channel 27 by dividing plate 23, wherein the first flow-guiding channel 25 connects with the 3rd flow-guiding channel 26, and the 3rd flow-guiding channel 26 connects with the second flow-guiding channel 27 and connects with sampler chamber 3 also by the first exhanst gas outlet 24.It should be noted that be, first flow-guiding channel 25 all connects with flue 5 with the second flow-guiding channel 27, flue gas in flue 5 flows into the 3rd flow-guiding channel 26 under the dynamic pressure effect of flue gas after the first flow-guiding channel 25 enters sampling tube 2, and wherein partial fume enters into sampler chamber 3 by the first exhanst gas outlet 24；Partial fume flows to the first flow-guiding channel 25 and is finally back to flue 5, and the flow velocity making the flue gas of entrance sampler chamber 3 is identical with the flow velocity of the flue gas in flue 5, can improve the accuracy of testing result.In the present embodiment, the width of dividing plate 23 is identical with the diameter of sampling tube 2, and therefore the first flow-guiding channel 25 and the 3rd flow-guiding channel 26 are isolated by dividing plate 23；And the length of dividing plate 23 is less than the length of sampling tube 2, therefore there is the second flow-guiding channel 27 and the second flow-guiding channel 27 connects with the first flow-guiding channel 25 and the 3rd flow-guiding channel 26 respectively.Further, dividing plate 23 is parallel to the length direction of sampling tube 2 and places, and preferred separator 23 is arranged at sampling tube 2 central authorities, makes the size of the first flow-guiding channel 25 and the equivalently-sized of the 3rd flow-guiding channel 26.
It should be noted that be, refer to the structural representation of sampling tube in other embodiments of Fig. 3, diversion cavity can be only divided into the first flow-guiding channel 25 and the second flow-guiding channel 27 by dividing plate 23, the first flow-guiding channel 25 and perforate 28 of the second flow-guiding channel 27 it is communicated with on dividing plate 23, the first side wall 22 is provided with the first exhanst gas outlet 24 connected with sampler chamber 3, after flue gas enters the first flow-guiding channel 25, partial fume flows to sampler chamber 3 by the first exhanst gas outlet 24, and partial fume flows to the second water conservancy diversion by perforate 28 and leads to 27 roads and return to flue 5.
Refer to Fig. 2 and Fig. 4, sampler chamber 3 includes the first cylinder 31, the second cylinder 32 of being placed in the first cylinder 31, be located at the first cylinder 31 and the baffle plate 33 of the second cylinder 32 end face and be located on baffle plate 33 heat insulating mattress 34 near sampling tube 2 side.Sampler chamber 3 also includes that the receiving chamber 35 in the second cylinder 32, encirclement accommodate second sidewall 36 in chamber 35, the second exhanst gas outlet 40 being located on the second sidewall 36, the filter 37 being located in receiving chamber 35, be wound in the carrier gas passage 38 of the second sidewall 36 setting and be arranged at the heater block 39 between the first cylinder 31 and the second cylinder 32.In the present embodiment, preferred carrier gas passage 38 is arranged on the second sidewall 36 and deviates from the side accommodating chamber 35, and in other embodiments, carrier gas passage 38 can also be arranged at the side pressing close to accommodate chamber 35 on the second sidewall 36.Concrete, accommodate chamber 35 and connected with the diversion cavity 21 in sampling tube 2 by the first exhanst gas outlet 24；Filter 37 includes filter chamber 372 and surrounds the filter wall 371 of filter chamber 372, and the flue gas that sampling tube 2 gathers is entered by the first exhanst gas outlet 24 and accommodates chamber 35, after the filtration of the filter wall 371 of filter 37, enters in filter chamber 372.Further, in the present embodiment, it is provided with, in accommodating chamber 35, the velocity of sound device 30 connected with vacuum generator 4, velocity of sound device 30 also connects with filter chamber 372 away from one end of vacuum generator 4, further, velocity of sound device 30 also includes the velocity of sound aperture 301 connected with filter chamber 372, the length of velocity of sound aperture 301 is more than aperture, when flue gas pressure reduction before and after velocity of sound aperture 301 is more than critical pressure differential, after flue gas flows through velocity of sound aperture 301, constant flow rate is constant, and flow to vacuum generator 4, flue gas pressure reduction before and after velocity of sound aperture 301 be vacuum generator 4 negative pressure and the flue gas that produce at filter chamber 372 time the pressure differential of malleation.Refer to Fig. 4, carrier gas passage 38 is the helical channel being wound in the second sidewall 36, carrier gas passage 38 includes the first carrier gas entrance 381 and the first carrier gas outlet 382, wherein the first carrier gas entrance 381 connects the gas circuit controller (not shown) of outside, for from external suction carrier gas；First carrier gas outlet 382 is connected with the second carrier gas entrance 441 of vacuum generator 4 by interface channel 6, for being imported in vacuum generator 4 by carrier gas.It is to be understood that, carrier gas is after the first carrier gas entrance 381 enters, move along spiral helicine passage in carrier gas passage 38, carrier gas passage 38 increases the heating surface (area) (HS of carrier gas, therefore carrier gas heated member 39 multi source heating, reduce further the dew point of carrier gas, improve the temperature of carrier gas, reduce time in vacuum generator 4, carrier gas mixes with flue gas, generating the probability of the corrosivity drops such as sulphuric acid because carrier gas temperature is too low, wherein the material of the second sidewall 36 of sampler chamber 3 is the material that heat conductivility is high.It is also understood that heater block 39 adstante febre, flue gas is the most heated within accommodating chamber 35 or filter chamber 372, it is possible to decrease the moisture content in flue gas, reduces the dew point of flue gas, reduces flue gas further and generates the probability of the corrosivity drops such as sulphuric acid.It should be noted that heater block 39 is adopted as the heating plate being connected with 220V power supply in the present embodiment, the second sidewall 36 that heating plate is evenly distributed in sampler chamber 3 is peripheral, and the second cylinder 32 surrounds heater block 39 and prevents thermal loss.It should be noted that, the first carrier gas entrance 381 is connected with gas circuit controller (not shown), and the gas being additionally operable to utilize gas circuit controller to provide is to blow away the dust of the interior entrance of carrier gas passage 38, granule.It should be noted that carrier gas is zero gas for diluting flue gas, zero gas is after water, oil, dust and filtration SO2, NOx, reaches the air of the requirements such as certain dew point, and SO2, the NOx in zero gas is less than 0.9ppm.Flue gas dew point is that the SO3 in the temperature that in flue gas, acid starts when condensing, such as flue gas forms temperature when acid mist condenses with the steam in flue gas.
Further, sampler chamber 3 also includes the temperature detection mouth 383 being arranged on the second sidewall 36, for detecting the temperature in sampler chamber 3.
Refer to Fig. 2 and Fig. 5, as it can be seen, vacuum generator 4 includes reaction chamber 41, the Laval nozzle 42 be located in reaction chamber 41, be located at the anemostat 43 immediately below Laval nozzle 42, the 3rd sidewall 44 surrounding reaction chamber 41 and the second carrier gas entrance 441 being located on the 3rd sidewall 44, smoke inlet 442 and sample gas outlet 443.Wherein, second carrier gas entrance 441 is connected with the entrance of Laval nozzle 42, sample gas outlet 443 just outlet to anemostat 43, smoke inlet 442 is located at Laval nozzle 42 outlet and the side of anemostat 43 entrance, should be appreciated that the second carrier gas entrance 441, the passage of Laval nozzle 42, the passage of anemostat 43 and sample gas outlet 443 are located along the same line.Dilution sampling device 1 also includes connecting the first carrier gas outlet 382 and interface channel 6 of the second carrier gas entrance 441, therefore the carrier gas led in carrier gas passage 38 enters in vacuum generator 4 by the second carrier gas entrance 441, after the high velocity jet of Laval nozzle 42 compresses carrier gas, interruption-forming jet is gone out at Laval nozzle 42, produce volume and inhale flowing, volume inhales the fluid flow forward together of surrounding static, therefore one low-pressure area of formation around jet, form certain vacuum, smoke inlet 442 is positioned at low-pressure area, therefore flue gas is inhaled into by smoke inlet 442, and flow to anemostat 43 after the jet mixing dilution of carrier gas, eventually through sample gas outlet 443 discharge.It should be noted that, vacuum generator 4 includes contraction section and diffuser, the minimum diameter of the pressure size of the low-pressure area of vacuum generator 4 or vacuum and Laval nozzle 42, contraction section is relevant with the shape of diffuser 43, flue gas malleation is relevant by the flow velocity of velocity of sound aperture 301 with flue gas to the pressure reduction of vacuum, and after pressure differential exceedes marginal value, the flow velocity of flue gas is by invariable, the amount of the flue gas therefore can drawn by the size regulation dilution sampling device 1 of regulation Laval nozzle 42, the flue gas realizing drawing low discharge is diluted reaction, avoid the directly a large amount of flue gases of extraction also need multiple times of filtration and process work, but also favorably extend dilution sampling device 1 service life of equipment, reduce the live load of dilution sampling device 1 equipment.
It should be noted that venturi nozzle can also be used in other embodiments to replace Laval nozzle, being connected with the entrance of venturi nozzle by the second carrier gas entrance 441, smoke inlet 442 is located at the side of venturi nozzle outlet.
It should be noted that be, vacuum generator 4 also includes the gas entrance 444 being located on the 3rd sidewall 44, gas entrance 444 connects the gas circuit controller (not shown) of outside, for correct dilution sampling device 1 thinner ratio, should be appreciated that gas entrance 444 and smoke inlet 442 are symmetrical relative to Laval nozzle 42.Concrete, use and flue gas concentration are quite or concentration is calibrated slightly larger than the gas of flue gas concentration, gas enters vacuum generator 4 and carrier gas mixed diluting by gas entrance 444, and the sample gas after diluting delivers to analyser by sample gas outlet 443, carries out calibrating thinner ratio.
It should be noted that be, vacuum generator 4 also includes the vacuum measurement hole 445 being located on the 3rd sidewall 44, vacuum measurement hole 445 connects the signal conditioner (not shown) of outside, signal conditioner is the instrument of detection vacuum, and vacuum measurement hole 445 is for for the vacuum size in detecting instrument detection vacuum generator 4.
The flue gas flow rate that above-mentioned dilution sampling device 1 utilizes sampling tube 2 to collect is identical with the flow velocity of the flue gas in flue 5, improves the accuracy of testing result；The carrier gas passage 38 also utilizing sampler chamber internal coiling shape increases the heating surface (area) (HS of carrier gas, reduce time in vacuum generator 4, carrier gas mixes with flue gas, generate the probability of the corrosivity drops such as sulphuric acid because carrier gas temperature is too low, and the heater block 39 in sampler chamber also can reduce the dew point of flue gas；Additionally, the flue gas utilizing vacuum generator 4 to realize drawing low discharge is diluted reaction, reduce the live load of dilution sampling device 1, extension device service life.
Described above to disclosed example so that the art professional is capable of or uses this utility model.Multiple amendment to these embodiments is apparent from for those skilled in the art, and generic principles defined herein can realize in the case of without departing from spirit or scope of the present utility model in other embodiments.Therefore, this utility model is not intended to be limited to the embodiments shown herein, and is to fit to the widest range consistent with principles disclosed herein and features of novelty.
Claims (10)
1. a vacuum generator, it is characterized in that, described vacuum generator includes reaction chamber, the Laval nozzle being located in described reaction chamber, surrounds the 3rd sidewall of described reaction chamber and be located at the second carrier gas entrance on described 3rd sidewall, smoke inlet, described second carrier gas entrance is connected with the entrance of described Laval nozzle, and described smoke inlet is located at the side of described Laval nozzle outlet.
2. vacuum generator as claimed in claim 1, it is characterized in that, described reaction chamber includes that low-pressure area, described low-pressure area are to be formed after the carrier gas entered from described second carrier gas entrance passes through described Laval nozzle, and described smoke inlet is positioned at described low-pressure area.
3. vacuum generator as claimed in claim 2, it is characterised in that described Laval nozzle includes contraction section and diffuser, and the pressure size of described low-pressure area is relevant to the shape of described Laval nozzle minimum diameter and described contraction section and described diffuser.
4. vacuum generator as claimed in claim 2, it is characterised in that described vacuum generator also includes being located at the anemostat below described Laval nozzle, described smoke inlet is positioned at the outlet of described Laval nozzle and the side of described anemostat entrance.
5. vacuum generator as claimed in claim 4, it is characterised in that described vacuum generator also includes the sample gas outlet being located on described 3rd sidewall, described sample gas outlet just outlet to described anemostat.
6. vacuum generator as claimed in claim 5, it is characterised in that described second carrier gas entrance, the passage of described Laval nozzle, the passage of described anemostat and the outlet of described sample gas are located along the same line.
7. vacuum generator as claimed in claim 1, it is characterised in that described vacuum generator also includes the gas entrance being located at described 3rd sidewall, and gas enters described vacuum generator by described gas entrance.
8. vacuum generator as claimed in claim 7, it is characterised in that described gas entrance and described smoke inlet are symmetrical relative to described Laval nozzle.
9. vacuum generator as claimed in claim 1, it is characterised in that described vacuum generator also includes the vacuum measurement hole being located on described 3rd sidewall, described vacuum measurement hole for detecting the vacuum size in described vacuum generator for detecting instrument.
10. a dilution sampling device, it is characterised in that include the vacuum generator as described in claim 1 to 9 is arbitrary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620302014.3U CN205620188U (en) | 2016-04-12 | 2016-04-12 | Vacuum generator and dilution sample thief |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620302014.3U CN205620188U (en) | 2016-04-12 | 2016-04-12 | Vacuum generator and dilution sample thief |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205620188U true CN205620188U (en) | 2016-10-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620302014.3U Expired - Fee Related CN205620188U (en) | 2016-04-12 | 2016-04-12 | Vacuum generator and dilution sample thief |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205620188U (en) |
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2016
- 2016-04-12 CN CN201620302014.3U patent/CN205620188U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161005 |