CN216386486U - Sampling experimental device - Google Patents
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- CN216386486U CN216386486U CN202122478976.8U CN202122478976U CN216386486U CN 216386486 U CN216386486 U CN 216386486U CN 202122478976 U CN202122478976 U CN 202122478976U CN 216386486 U CN216386486 U CN 216386486U
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Abstract
The utility model discloses a sampling experimental device which comprises a collecting area, a heat exchange medium loop, a water storage tank, a constant temperature cover, a refrigerating unit, a heating unit, an air supply unit and a purging air circuit, wherein the collecting area is provided with a coiled pipe, a water bath tank and a collecting bottle assembly. The experimental device is additionally provided with a refrigerating unit, a heating unit, an air supply unit and a constant temperature cover. The refrigerating unit and the heating unit can cool and heat a heat exchange medium exchanging heat with the measured gas, and can cool and heat the gas in the air supply unit connected with the constant temperature cover so as to obtain the smoke temperature meeting the experimental requirements; the heating unit can also heat the sweeping gas in the sweeping gas circuit connected with the air supply unit and the air inlet of the coiled pipe, so that the temperature of the heated warm air flow is higher even if the temperature of the external environment is lower, the evaporation of residual water drops in the experimental device is facilitated, the dryness of the inner part of the experimental device and the joint of the device is further ensured, and the accuracy of sampling test is improved.
Description
Technical Field
The utility model relates to the technical field of environmental test equipment, in particular to a sampling experimental device.
Background
The primary particles discharged by the fixed pollution source are divided into filterable particles and condensable particles, and the sum of the filterable particles and the condensable particles is the total particles discharged from the fixed pollution source to the ambient air. The relevant literature describes that coal-fired flue gas condensable particulate matter emissions account for 76% of total PM10 emissions, account for 49% of total particulate matter emissions, and some are even more than 2 times greater than filterable particulate matter emissions. The condensable particles contribute significantly to the emission of the fixed-source particles, and are therefore non-negligible fixed-source particulate pollutants.
The existing testing method for condensable particles basically adopts a dry type impact bottle method, however, when the ambient temperature is freezing point temperature or even lower, condensed water drops in the impact bottle are easy to freeze in the sampling process, and SO in smoke gas2There is a possibility that the SO may remain in the ice cake and the nitrogen purge may be performed immediately after the sampling is completed, but the SO cannot be completely discharged2Raising the inorganic components in the condensable particulate; after a long time of nitrogen purging, frozen condensed water drops are possibly not easy to be purged, so that the mass concentration of condensable particles is reduced; the grinding sealing is usually adopted between the glass impact bottles, after one collected sample is cleaned, once residual water drops are left on the grinding surfaces in the impact bottles and between the impact bottles, the glass impact bottles are easy to freeze in a low-temperature environment, and the accuracy of next sample collection is influencedAnd (4) air tightness and tightness.
Therefore, how to improve the accuracy of the sampling test is a technical problem that those skilled in the art are always concerned about.
SUMMERY OF THE UTILITY MODEL
The utility model provides a sampling experimental device, which comprises the following components:
the collecting region is provided with a coiled pipe, a water bath tank and a collecting bottle assembly, the collecting bottle assembly is positioned at the downstream of the coiled pipe, the collecting bottle assembly comprises at least one collecting bottle, each collecting bottle and the coiled pipe are configured through a pipeline to form a measured gas circulation channel, and each collecting bottle is positioned inside the water bath tank;
the heat exchange medium loop is used for exchanging heat with the measured gas flowing in the coiled pipe and the collecting bottle component;
the air outlet of the air supply unit is connected with the purging air passage and can provide purging warm air for the gas circulation passage in the coiled pipe and the collection bottle assembly; the purging gas circuit is connected with the gas inlet of the coiled pipe;
the refrigerating unit is provided with a refrigerating component and can provide refrigerating capacity for the medium in the heat exchange medium loop and the gas in the air supply unit;
and the heating unit is provided with a heating component and can provide heat for the medium in the heat exchange medium loop and the gas in the air supply unit.
The experiment device provided by the utility model is additionally provided with the refrigerating unit and the heating unit, so that not only can the refrigerating unit and the heating unit cool and heat a heat exchange medium for exchanging heat with a detected gas to obtain a smoke temperature meeting experiment requirements, but also the heating unit can heat the sweeping gas in the sweeping gas path connected with the air supply unit and the air inlet of the coiled pipe, so that even if the temperature of the external environment is lower, the temperature of the heated warm air flow is higher, the evaporation of residual water drops in the experiment device is facilitated, the drying of the inside of the experiment device and the connection part of the device is further ensured, and the accuracy of sampling test is improved.
Optionally, the heat exchange medium loop comprises a liquid storage tank and a pumping part, and the inner cavity of the liquid storage tank, the pumping part, the heat exchange medium channel of the coiled pipe and the heat exchange medium channel inside the water bath tank form a circulation loop; the refrigerating component and the heating component cool and heat media in the inner cavity of the liquid storage box, and partial pipe sections of the air supply unit are located in the inner cavity of the liquid storage box.
Optionally, the collecting device further comprises water storage tanks, the collecting bottles are in one-to-one correspondence with the collecting bottles and are connected in series, each collecting bottle is located inside the water storage tank, inner cavities of the water storage tanks are connected in series through pipelines, each water storage tank sequentially comprises a first water storage tank, … … and an Nth water storage tank along the flowing direction of gas, an inlet of the Nth water storage tank is communicated with an outlet of an inner cavity of the liquid storage tank, an outlet of the first water storage tank is communicated with an inner cavity of the water bath tank, a liquid outlet hole of the water bath tank is communicated with a liquid inlet of the coiled pipe, and a liquid outlet of the coiled pipe is connected with an inlet of the inner cavity of the liquid storage tank.
Optionally, the heights of the first water storage tank, the … … and the nth water storage tank are gradually increased, the inlet of each water storage tank is close to the tank bottom, the outlet of each water storage tank is close to the notch, the outlet of each nth water storage tank is communicated with the inlet of the nth-1 water storage tank through a pipeline and is sequentially communicated with the inlet of each nth water storage tank, the outlet of each first water storage tank is communicated with the inner cavity of the water bath tank through a pipeline, and the outlet of the pipeline communicated with the outlet of each first water storage tank is close to the tank bottom of the water bath tank.
Optionally, the water bath tank includes an upward opening, and further includes a thermostatic cover covering the opening of the water bath tank, a plurality of exhaust holes are formed in an inner wall of the thermostatic cover, each exhaust hole communicates with a space formed by the thermostatic cover and the water bath tank, the air supply unit further communicates with the exhaust holes through a pipeline, and an air outlet of the air supply unit is further connected with the thermostatic cover on the water bath tank, so that a thermostatic gas can be provided for a space environment formed between the thermostatic cover and the water bath tank;
or/and an atomizer is further installed in the thermostatic cover and used for atomizing part of heat exchange media in the water bath box into a space formed by the thermostatic cover and the water bath box.
Optionally, the air supply unit includes an air pump, a thermometer and a coil, the thermometer is configured to measure an outlet airflow temperature of the air pump, and the coil, the refrigeration unit and the heating unit are located in the same housing;
or/and the air outlet end of the air supply unit is also provided with a thermometer, and the thermometer is used for monitoring the air outlet temperature of the air supply unit.
Optionally, the device further comprises a purging device, wherein the purging device comprises a gas storage tank, a gas outlet of the gas storage tank is communicated with a gas inlet of the coiled pipe through the purging gas path, and the purging gas path is further provided with a pressure reducing valve, a control valve and a flow meter;
the blowing air path is connected between the air outlet of the air supply unit and the air inlet of the coiled pipe, or the blowing air path is connected between the air storage tank and the air inlet of the coiled pipe.
Optionally, the device further comprises a sampling instrument, a sampling port of the sampling instrument is communicated with the last-stage collecting bottle, and a communicating pipeline between the sampling instrument and the last-stage collecting bottle is provided with a filtering device and a temperature measuring instrument.
Optionally, still include sampling rifle, pitot tube and temperature controller, the gas outlet intercommunication of sampling rifle the air inlet of coiled pipe, the temperature controller install in the sampling rifle, be used for detecting the inside sampling gas temperature of sampling rifle.
Drawings
FIG. 1 is a schematic diagram of a sampling experiment apparatus according to an embodiment of the present invention;
fig. 2 is a schematic view of a cooling and heating fan according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 2, fig. 1 is a schematic structural diagram of a sampling experiment apparatus according to an embodiment of the present invention; fig. 2 is a schematic view of a cooling and heating fan according to an embodiment of the present invention.
The technical scheme and the technical effect are introduced by taking the sampling experimental device applied to the collection of the condensable particles as an example. Of course, the sampling device provided herein can also be applied to the collection of other substances, for example, the collection bottle assembly and the water storage tank and the thermostatic cover which are matched with the collection bottle assembly are eliminated, and when the filtering device and the temperature measuring instrument which are arranged at the front end of the sampling instrument are directly connected to the air outlet of the coiled pipe, the sampling device can be applied to the collection of the flue gas SO3。
The utility model provides a sampling experimental device which at least comprises a collection area, a heat exchange medium loop, a refrigerating unit 12-3, a heating unit 12-4, an air supply unit 12-5 and a purging air circuit.
Wherein, the district of gathering is provided with coiled pipe 5, water bath 11 and collection bottle subassembly, and the collection bottle subassembly is located the low reaches of coiled pipe 5, and collection bottle subassembly includes at least one collection bottle, and each collection bottle passes through the pipeline configuration with coiled pipe 5 and forms by survey gas circulation passageway to each collection bottle all is located water bath 11 insidely. The figures show a specific embodiment in which the collection bottle assembly comprises two collection bottles, which are defined herein as a short neck bottle 6 and a long neck bottle 7 for simplicity of describing the technical solution. Of course, the number of collection bottles is not limited to two, but may be one or three or another number. The shape and number of individual collection vials can be tailored to the particular application environment.
The structure of the serpentine tube 5 can be the same as the prior art and is not limited herein.
The heat exchange medium loop is used for exchanging heat with the measured gas flowing in the coiled pipe 5 and the collecting bottle assembly, namely the heat exchange medium loop and the measured gas circulation channel can exchange heat.
The refrigerating unit 12-3 is provided with a refrigerating component which can provide cold energy for a medium in a heat exchange medium loop and gas in the air supply unit 12-5; that is to say, the refrigeration component can cool down and cool down the medium in the heat exchange medium loop, and cool down and keep the temperature of the ambient air covered by the constant temperature cover 13 connected to the air supply unit 12-5, that is, the ambient air on the outer wall of the collection bottle assembly which cannot be in direct contact with the heat exchange medium, and the temperature of the cooling down and cooling down temperature can be determined according to the specific use environment, and the purpose is to make the temperature of the gas to be measured in the collection area within a predetermined range, for example, 25 ℃.
The heating unit 12-4 in the utility model is provided with a heating part which can provide heat for the medium in the heat exchange medium loop and the gas in the air supply unit. Similarly, the heating component can heat and raise the temperature of the medium in the heat exchange medium loop, and simultaneously heat and maintain the temperature of the ambient air covered by the constant temperature cover 13 connected with the air supply unit 12-5, that is, the environment of the outer wall of the collection bottle assembly which cannot be in direct contact with the heat exchange medium, wherein the heating and raising temperature can be determined according to the specific use environment, and the purpose is to maintain the temperature of the measured gas in the collection area within a predetermined range, for example, 25 ℃. And the heating part in the utility model can also heat the purging gas in the purging gas path connected with the air supply unit 12-5, and the gas after temperature rise is used for purging the gas circulation channel formed by the serpentine pipe 5, the collection bottle assembly and the like. Like this when ambient temperature is freezing point temperature even lower, after the sample washs, utilize the gas after the intensification to sweep the experiment gas circuit, can ensure the inside drying of sampling experimental apparatus, including the junction drying between each part of experimental apparatus, be favorable to the device gas tightness to guarantee, be favorable to improving the accuracy of sampling test.
The purging gas circuit in the utility model is connected between the air outlet of the air supply unit 12-5 and the air inlet of the serpentine pipe 5, that is, the heating unit 12-4 provides heat for the gas in the purging gas circuit.
Or, the purging gas circuit in the utility model can also be connected between the gas source and the gas inlet of the coiled pipe 5; the gas source can be a nitrogen gas storage tank 14-1, SO that the sweeping gas in the sweeping gas circuit can flow to the gas inlet of the coiled pipe 5 from the gas source and then enters the collection bottle assembly through the coiled pipe 5 SO as to sweep the coiled pipe 5 and the gas circulation channel inside the collection bottle assembly, and influence gas such as SO in the gas circuit in the sampling process can be removed2。
From the above description, the experiment device provided by the utility model is additionally provided with the refrigerating unit 12-3 and the heating unit 12-4, the refrigerating unit 12-3 and the heating unit 12-4 can not only cool and heat a heat exchange medium exchanging heat with a detected gas, but also cool and heat the gas in the air supply unit 12-5 connected with the constant temperature cover 13 so as to obtain a smoke temperature meeting experiment requirements, and the heating unit 12-4 can also heat the blowing gas in the blowing gas circuit, so that even if the external environment temperature is low, the heated warm air flow has a high temperature, and is beneficial to evaporation of residual water drops in the experiment device, further the drying of the inside of the experiment device and the connection part of the device is ensured, and the accuracy of sampling test is improved.
The air outlet end of an air supply unit 12-5 in the utility model is connected with the purging air circuit; or/and the air outlet end of the air supply unit 12-5 is connected with the constant temperature cover 13 on the water bath tank 11; the air outlet end of the air supply unit 12-5 is also provided with a thermometer 12-52, and the thermometer 12-52 can monitor the air outlet temperature of the air supply unit 12-5, namely the temperature of the air flow at the outlet of the air suction pump 12-51.
The heat exchange medium loop in the experimental device comprises a liquid storage tank 12-2 and a pumping part 12-1, the pumping part 12-1 can be arranged in the inner cavity of the liquid storage tank 12-2 or outside the liquid storage tank 12-2, and the pumping part 12-1 can be an electric pump.
The inner cavity of the liquid storage tank 12-2, the pumping part 12-1, the heat exchange medium channel of the coiled pipe 5 and the heat exchange medium channel in the water bath tank 11 form a circulation loop; specifically, the heat exchange medium in the circulation loop may be tap water, or distilled water, or other clean water; specifically, the refrigerating part and the heating part cool and heat the medium in the inner cavity of the liquid storage tank 12-2; part of the pipe section of the air supply unit 12-5 is positioned in the inner cavity of the liquid storage box 12-2, so that the energy of the refrigerating part and the heating part is also transferred to the gas in the purging gas circuit connected with the air supply unit 12-5 through the heat exchange medium, namely the gas and the heat exchange medium carry out heat exchange.
The bottom of the liquid storage tank 12-2 is provided with a liquid inlet 12-21, the upper part of the liquid storage tank is provided with a liquid outlet 12-22, under the action of thrust generated by pumping of the pumping part 12-1, heat exchange medium enters the liquid storage tank 12-2 from the liquid inlet 12-21 at the bottom, and is discharged from the liquid outlet 12-22 at the upper part after the liquid storage tank 12-2 is filled with the heat exchange medium. The bottom of the liquid storage tank 12-2 can be also provided with a liquid outlet 12-23, and the liquid in the liquid storage tank can be drained through the liquid outlet 12-23 after the experiment is finished.
When the heat exchange medium is recycled, the liquid inlet 12-21 of the liquid storage tank 12-2 is connected with the upper liquid outlet 5-1 of the coiled pipe 5, the liquid outlet 12-22 of the liquid storage tank 12-2 is connected with the liquid inlet 11-1 of the water bath tank 11, namely the inlet of the Nth water storage tank, the outlet of the first water storage tank is communicated with the inner cavity of the water bath tank 11, the liquid outlet hole 11-2 of the water bath tank 11 is connected with the lower liquid inlet 5-2 of the coiled pipe 5, the connection can be realized through a silicone tube, and the heat exchange medium can be recycled from the water bath tank 11 to the coiled pipe 5 to the liquid storage tank 12-2 and then back to the water bath tank 11 under the suction action of the pumping part 12-1.
The sampling experiment device in the embodiment has the advantage of simple structure as much as possible.
In a specific embodiment, the sampling experimental device further comprises water storage tanks 11-4 corresponding to the collection bottles one by one, wherein the collection bottles are connected in series, each collection bottle is located inside the water storage tank 11-4, inner cavities of the water storage tanks 11-4 are connected in series through pipelines, and along the gas flow direction, each water storage tank 11-4 sequentially comprises a first water storage tank, … … and an Nth water storage tank, wherein N is a natural number, an inlet of the Nth water storage tank is communicated with a liquid outlet of an inner cavity of the liquid storage tank 12-2, an outlet of the first water storage tank is communicated with an inner cavity of the water bath tank 11, a liquid outlet hole of the water bath tank 11 is communicated with a liquid inlet of the coiled pipe 5, and a liquid outlet of the coiled pipe 5 is connected with a liquid inlet of the inner cavity of the liquid storage tank 12-2. Therefore, the direction of the heat exchange medium flowing through each water storage tank 11-4 is opposite to the flow direction of the gas to be detected, and the heat exchange efficiency of the heat exchange medium and the gas to be detected can be improved.
In a specific embodiment, the heights of the first water storage tank, … … and the Nth water storage tank are gradually increased, the inlet of each water storage tank 11-4 is close to the bottom of the water tank, the outlet of each water storage tank is close to the notch, the outlet of the Nth water storage tank is communicated with the inlet of the Nth-1 water storage tank through a pipeline 11-41 and is sequentially communicated, the outlet of the first water storage tank is communicated with the inner cavity of the water bath tank 11 through a pipeline 11-42, and the outlet of the pipeline 11-42 communicated with the outlet of the first water storage tank is close to the bottom of the water bath tank 11.
The inlet position of each water storage tank is lower, and the outlet position is higher, so that only when the water in the previous water storage tank is filled up and rises to the outlet position, the heat exchange medium in the water storage tank flows out, and the heat exchange medium can be ensured to completely soak the outer surface of each collection bottle as far as possible.
Taking the collection bottle comprising the short-neck bottle 6 and the long-neck bottle 7 as an example, the heat exchange medium in the water bath tank 11 should completely soak the outer surfaces of the short-neck bottle 6 and the long-neck bottle 7 as much as possible, the glass connecting pipe connected between the short-neck bottle 6 and the long-neck bottle 7, the glass connecting pipe between the long-neck bottle 7 and the filtering device 8, the filtering device 8 and other glass components, which are only exposed in the ambient air above the heat exchange medium in the water bath tank 11 due to position limitation. In order to ensure the constant temperature effect of the gas in the sampling gas circuit, the following improvement is also carried out.
Specifically, the water bath box 11 comprises an upward opening, in order to ensure the constant temperature inside the sampling gas circuit as much as possible, the sampling experimental device can further comprise a constant temperature hood 13 which covers the opening of the water bath box 11, a plurality of exhaust holes are formed in the inner wall of the constant temperature hood 13, each exhaust hole is communicated with a cavity formed by the constant temperature hood 13 and the water bath box 11, and the air supply units 12-5 are also communicated with the exhaust holes through pipelines.
The constant temperature cover 13 is arranged at the upper part of the water bath tank 11, and the constant temperature cover 13 is matched with the water bath tank 11 for installation. The constant temperature cover 13 can cover the connecting pipe connected between the short-necked bottle 6 and the long-necked bottle 7, the connecting pipe between the long-necked bottle 7 and the filtering device 8, and the glass components such as the filtering device 8 which can not be in direct contact with the heat exchange medium.
The inside of the constant temperature cover 13 is also provided with exhaust holes 13-1 which are uniformly distributed, the constant temperature cover 13 is connected with the air outlet end of the air supply unit 12-5, and the heated or refrigerated air can be directly discharged from the exhaust holes 13-1 through the air supply unit 12-5 under the action of the air suction pump 12-51 and is dispersed in the space which can be covered by the constant temperature cover 13, so that the constant temperature function of heating or refrigerating the regional ambient air covered by the constant temperature cover 13 can be realized. When external environment temperature is freezing point temperature even lower, under the warm air effect of constant temperature cover 13 exhaust, can improve the outer wall ambient temperature who can't with heat transfer medium direct contact's collection experimental apparatus greatly, avoid in the experimentation, have the comdenstion water to drip the condensation in above-mentioned region and freeze. Similarly, when the external environment temperature is higher than 30 ℃, the constant temperature hood 13 can also discharge the air after refrigeration, so that the temperature of the air in the area covered by the constant temperature hood 13 can be reduced, the constant temperature hood is favorable for keeping the temperature of the smoke inside the device which can not be in direct contact with the heat exchange medium, and the collection of samples is favorable.
When required, because the heat conduction speed of dry air is relatively slow, can also set up atomizer 13-2 in constant temperature hood 13, atomizer 13-2 can directly utilize the constant temperature heat transfer medium in water bath 11 as the atomizing water source, heat transfer medium is through atomizing back, directly the dispersion is in the environmental zone that constant temperature hood 13 covered, partial heat transfer medium after the atomizing can adsorb the outer wall at above-mentioned sampling device, when constant temperature hood 13 exhaust heat/cold air also disperses in this region, then the outer wall of sampling experimental apparatus adsorbs is moist hot/cold air, more be favorable to the constant temperature effect.
Each collection bottle and the constant temperature cover 13 can be fixed in the water bath tank 11 through the fixing frame 11-3, so that the collection bottles and the like are stably installed during sampling work, and the experimental efficiency is improved.
Taking the number of the collection bottles as two, including the short-neck bottle 6 and the long-neck bottle 7 as an example, the water storage tank 11-4 comprises a first water storage tank 11-4b and a second water storage tank 11-4a, the two water storage tanks are set according to the sizes and the placing positions of the short-neck bottle 6 and the long-neck bottle 7, and the short-neck bottle 6 and the long-neck bottle 7 are just placed in the corresponding water storage tanks 11-4 under the fixing action of the fixing frame 11-3. The inner diameter of the water storage tank 11-4 is 10-30 mm larger than the outer diameter of the collection bottle inside the water storage tank, so that a sufficiently large heat exchange medium storage area is formed between the outer wall of the collection bottle and the inner wall of the water storage tank 11-4 after the collection bottle is placed into the corresponding water storage tank 11-4. The height of the water storage tank 11-4 is equal to that of the collection bottle positioned in the water storage tank, so that after the water storage tank 11-4 is filled with the heat exchange medium, the heat exchange medium can completely soak the outer surfaces of the short-neck bottle 6 and the long-neck bottle 7 as far as possible, and the temperature of the gas to be measured in the collection bottle is constant.
In one embodiment, the air supply unit 12-5 of the sampling experimental apparatus includes an air suction pump 12-51, a thermometer 12-52 and a coil, and the coil, the refrigeration unit 12-3 and the heating unit 12-4 are located inside the same shell 12.
The heat transfer medium quantity that can the splendid attire is about 1 ~ 2L in the liquid reserve tank 12-2, only for a small part of entire system circulation heat transfer medium quantity, so design, on the one hand, can reduce casing 12's volume, and on the other hand, the inside heat transfer medium quantity of casing 12 is few, through the controlled temperature who changes casing 12, can realize heat transfer medium quick refrigeration or rapid heating in the liquid reserve tank 12-2.
Valves are arranged on the liquid inlet 12-21 and the liquid outlet 12-22 of the liquid storage tank 12-2, and when warm air purging is needed, the air supply unit 12-5 can also be used as a heat source for warm air purging. At this time, the heating unit 12-4 can be started, the water bath control temperature is increased, the pumping part 12-1 is closed, and the valves on the liquid inlet 12-21 and the liquid outlet 12-22 are closed, so that the temperature of the internal heat exchange medium is rapidly increased. Because the liquid storage tank 12-2 is of a closed structure, in the process of rapid temperature rise, when the pressure in the liquid storage tank 12-2 is increased, manual pressure relief can be carried out by opening and closing a valve on the liquid outlet 12-22. The air supply unit 12-5 is connected with a gas circulation channel formed by the coiled pipe 5, the collection bottle assembly and the like through a purging air path, and performs warm air purging on the gas circulation channel.
The CPM sampling process also comprises a sample cleaning process, when the environmental temperature is freezing point temperature or even lower, the residual water drops on the cleaned sampling device are easy to freeze, and the air tightness of the sampling device is easy to influence due to the icing of the residual water drops at the grinding butt joint of the glass sampling device, so that a warm air blowing step can be added between two sampling tests under the low-temperature environmental condition.
The sampling experiment device in each embodiment further comprises a blowing device 14 which comprises an air storage tank, and an air outlet of the air storage tank is communicated with an air inlet of the coiled pipe 5 through a blowing air path, namely a hose 14-3. The gas storage tank can be filled with nitrogen, namely the gas storage tank is bottled with 14-1 nitrogen. When nitrogen purging is carried out on site, bottled nitrogen 14-1 can be fixed on the ground below a test platform, a pressure reducing valve 14-2 is arranged on the bottled nitrogen 14-1, the pressure reducing valve 14-2 can reduce the air supply pressure of the bottled nitrogen 14-1, the pressure reducing valve 14-2 guides the nitrogen on the ground to the test platform through a hose 14-3, the hose 14-3 can bear certain pressure, the length of the hose 14-3 can be determined according to the height difference between the test platform and the ground, a control valve 14-4 and a flowmeter 14-5 are further connected to the tail end of the hose 14-3, the pressure borne by the hose 14-3 can be reduced through the pressure reducing effect of the pressure reducing valve 14-2, on the premise that the pressure meets the requirement of air supply flow, the opening degree of the control valve 14-4 and the flow monitoring of the flowmeter 14-5 are carried out, the direct air supply of bottled nitrogen 14-1 from the ground to the CPM collection device on the test platform can be realized.
Nitrogen purging is typically performed before each sample collection to remove potentially residual interfering gases such as SO from the collection bottle2And the like.
Each sampling experiment device can also comprise a sampling instrument 10, a sampling port of the sampling instrument 10 is communicated with the last-stage collecting bottle, and a filtering device 8 and a temperature measuring instrument 9 are arranged on a communicating pipeline of the sampling instrument 10 and the last-stage collecting bottle.
Furthermore, experimental apparatus still includes sampling rifle 2, pitot tube 1 and temperature controller 3, and sampling rifle 2's gas outlet intercommunication coiled pipe 5's air inlet, and temperature controller 3 installs in sampling rifle 2 for detect the inside sampling gas temperature of sampling rifle 2.
Supporting installation of pitot tube 1 and sampling rifle 2, sampling rifle 2 front ends can install low concentration sampling and strain a section of thick bamboo, pitot tube 1 is two back pipes, during the sampling, one is facing to the air current direction, another is facing back to the air current direction, two back pipes of pitot tube 1 test end flush, pitot tube 1's tip and sampling rifle 2 install the sampling mouth that strains a section of thick bamboo behind the low concentration sampling section of thick bamboo flush, through the auxiliary action of pitot tube 1, can test near the flue gas pressure of sampling position, thereby realize the constant speed sampling of particulate matter.
The sampling gas circuit can adopt 316L or even better stainless steel pipe in the sampling rifle 2, avoids sampling gas circuit to be corroded among the sampling process, simultaneously, still is equipped with heating device in the sampling rifle 2, through the control of temperature controller 3, can realize the whole journey heat tracing in the sampling rifle 2, and the temperature can be constantly 105 +/-10 ℃ as required, or other.
The coiled pipe 5 is butted with the sampling gun 2 through the connecting hose 4.
In addition, the utility model also provides a sampling experimental device, such as can be applied to flue gas SO3And (4) collecting.
Specifically, on the basis of the experimental device, the collection bottle assembly and the water storage tank 11-4 and the constant temperature cover 13 which are matched with the collection bottle assembly are eliminated, and when the filtering device 8 and the temperature measuring instrument 9 which are arranged at the front end of the sampling instrument 10 are directly connected to the air outlet end of the coiled pipe 5, the collection bottle assembly can be used as the flue gas SO3The sampling device of (1).
The sampling experiment device provided by the utility model is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. A sampling experiment device is characterized by comprising the following components:
the collecting region is provided with a coiled pipe, a water bath tank and a collecting bottle assembly, the collecting bottle assembly is positioned at the downstream of the coiled pipe, the collecting bottle assembly comprises at least one collecting bottle, each collecting bottle and the coiled pipe are configured through a pipeline to form a measured gas circulation channel, and each collecting bottle is positioned inside the water bath tank;
the heat exchange medium loop is used for exchanging heat with the measured gas flowing in the coiled pipe and the collecting bottle component;
the purging gas circuit is connected with the gas inlet of the coiled pipe;
the air outlet of the air supply unit is connected with the purging air passage and can provide purging warm air for the gas circulation passage in the coiled pipe and the collection bottle assembly;
the refrigerating unit is provided with a refrigerating component and can provide refrigerating capacity for the medium in the heat exchange medium loop and the gas in the air supply unit;
and the heating unit is provided with a heating component and can provide heat for the medium in the heat exchange medium loop and the gas in the air supply unit.
2. The sampling experiment device according to claim 1, wherein the heat exchange medium circuit comprises a liquid storage tank and a pumping part, and the inner cavity of the liquid storage tank, the pumping part, the heat exchange medium channel of the serpentine pipe and the heat exchange medium channel inside the water bath tank form a circulation circuit; the refrigerating component and the heating component respectively cool and heat media in the inner cavity of the liquid storage box, and partial pipe sections of the air supply unit are located in the inner cavity of the liquid storage box.
3. The sampling experiment device according to claim 2, further comprising water storage tanks, wherein the water storage tanks correspond to the collection bottles one by one, the collection bottles are connected in series, each collection bottle is located inside the water storage tank, the inner cavities of the water storage tanks are connected in series through a pipeline, each water storage tank sequentially comprises a first water storage tank, … … and an Nth water storage tank along the gas flow direction, the inlet of the Nth water storage tank is communicated with the outlet of the inner cavity of the liquid storage tank, the outlet of the first water storage tank is communicated with the inner cavity of the water bath tank, the liquid outlet of the water bath tank is communicated with the liquid inlet of the coiled pipe, and the liquid outlet of the coiled pipe is connected with the inlet of the inner cavity of the liquid storage tank.
4. The sampling experiment device according to claim 3, wherein the heights of the first water storage tank, the … … and the Nth water storage tank are gradually increased, the inlet of each water storage tank is close to the bottom of the tank, the outlet of each water storage tank is close to the notch, the outlet of the Nth water storage tank is communicated with the inlet of the (N-1) th water storage tank through a pipeline, the outlets of the first water storage tanks are sequentially communicated, the outlet of the first water storage tank is communicated with the inner cavity of the water bath tank through a pipeline, and the outlet of the pipeline communicated with the outlet of the first water storage tank is close to the bottom of the water bath tank.
5. The sampling experiment device according to claim 2, wherein the water bath box comprises an upward opening, and further comprises a thermostatic cover which covers the opening of the water bath box, a plurality of exhaust holes are formed in the inner wall of the thermostatic cover, each exhaust hole is communicated with a space formed by the thermostatic cover and the water bath box, and an air outlet of the air supply unit is further connected with the thermostatic cover on the water bath box and can provide thermostatic air for a space environment formed between the thermostatic cover and the water bath box;
or/and an atomizer is further installed in the thermostatic cover and used for atomizing part of heat exchange media in the water bath box into a space formed by the thermostatic cover and the water bath box.
6. The sampling experiment device according to claim 1, wherein the air supply unit comprises an air suction pump, a thermometer and a coil, and the coil, the refrigeration unit and the heating unit are positioned in the same shell;
or/and the air outlet end of the air supply unit is also provided with a thermometer, and the thermometer is used for monitoring the air outlet temperature of the air supply unit.
7. The sampling experiment device according to any one of claims 1 to 6, further comprising a purging device, including a gas storage tank, wherein a gas outlet of the gas storage tank is communicated with a gas inlet of the coiled pipe through the purging gas path, and a pressure reducing valve, a control valve and a flow meter are further arranged on the purging gas path;
the blowing air path is connected between the air outlet of the air supply unit and the air inlet of the coiled pipe, or the blowing air path is connected between the air storage tank and the air inlet of the coiled pipe.
8. The sampling experimental device according to any one of claims 1 to 6, further comprising a sampling instrument, wherein a sampling port of the sampling instrument is communicated with the last stage of collecting bottle, and a filtering device and a temperature measuring instrument are arranged on a communication pipeline between the sampling instrument and the last stage of collecting bottle.
9. The sampling experiment device according to any one of claims 1 to 6, further comprising a sampling gun, a pitot tube and a temperature controller, wherein an air outlet of the sampling gun is communicated with an air inlet of the coiled tube, and the temperature controller is installed in the sampling gun and used for detecting the temperature of the sampling gas inside the sampling gun.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117163450A (en) * | 2023-11-02 | 2023-12-05 | 上海鲁源控制设备有限公司 | Nitrogen oxide-containing polluted gas detection and sealing equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117163450A (en) * | 2023-11-02 | 2023-12-05 | 上海鲁源控制设备有限公司 | Nitrogen oxide-containing polluted gas detection and sealing equipment |
| CN117163450B (en) * | 2023-11-02 | 2024-01-30 | 上海鲁源控制设备有限公司 | Nitrogen oxide-containing polluted gas detection and sealing equipment |
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