CN116124567B - Volatile organic compound enrichment pretreatment device - Google Patents
Volatile organic compound enrichment pretreatment device Download PDFInfo
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- CN116124567B CN116124567B CN202310052992.1A CN202310052992A CN116124567B CN 116124567 B CN116124567 B CN 116124567B CN 202310052992 A CN202310052992 A CN 202310052992A CN 116124567 B CN116124567 B CN 116124567B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4022—Concentrating samples by thermal techniques; Phase changes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/42—Low-temperature sample treatment, e.g. cryofixation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4022—Concentrating samples by thermal techniques; Phase changes
- G01N2001/4033—Concentrating samples by thermal techniques; Phase changes sample concentrated on a cold spot, e.g. condensation or distillation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The application relates to a volatile organic compound enrichment pretreatment device, which comprises a refrigeration component, a cold guide component arranged on the refrigeration component, a VOC treatment part arranged on the cold guide component and a heating component arranged at one end of the VOC treatment part far away from the refrigeration component; the cold guide assembly comprises a bottom cold guide plate arranged on the refrigeration component, a middle cold guide plate arranged on one side of the bottom cold guide plate far away from the refrigeration component, and a plurality of cold guide blocks arranged on the middle cold guide plate; the VOC treatment part comprises a water removal loop for removing the moisture in the VOCs by condensation and a trapping loop for collecting the VOCs by condensation, wherein the trapping loop is connected to the detection equipment, and the cold guide blocks are arranged in one-to-one correspondence with the trapping loop and the water removal loop; the bottom cold guide piece and the middle cold guide piece are both made of copper materials, and the cold guide blocks are all made of aluminum materials. The heat-exchange type refrigerating device has the effects of reducing heat transfer to the refrigerating component, keeping stable operation of the refrigerating component and improving refrigerating efficiency of the refrigerating component.
Description
Technical Field
The application relates to the field of pretreatment devices of atmospheric volatile organic compound measuring systems, in particular to a pretreatment device for enriching volatile organic compounds.
Background
Volatile Organic Compounds (VOCs) not only have strong toxicity, but also play an important role in the atmospheric chemical reaction process, and are the most important precursors of O-gas and secondary organic aerosols. VOCs can have photochemical reaction with nitrogen oxides to form photochemical smog; the organic compound can also react with oxidizing agents such as OH, NO, O and the like in the atmosphere in multiple ways to generate secondary organic aerosol, and has important influence on O and PM2.5 of the ambient air.
The monitoring method of VOCs can be divided into two types of off-line monitoring and on-line monitoring, including four processes of sampling, pre-concentration, separation and detection, wherein the pre-concentration process is also called as a pretreatment process, and the process has a great influence on the accuracy of the subsequent separation and detection results. The method of the preconcentration process often uses thermal analysis. The thermal desorption method is to heat the trap tube and simultaneously introduce carrier gas to desorb the adsorbed VOCs into the chromatographic column for separation. The thermal analysis has higher sensitivity, can avoid the interference of solvent analysis, and has wider application.
In the pre-concentration step of the VOCs in the existing equipment, in order to enable the VOCs trapped at low temperature to be completely and rapidly gasified and enter a detection analysis system, the VOCs trapping pipe must be rapidly heated from the low temperature condition to the specified temperature (above 100 ℃). However, when the device is used for heat analysis, heat is easily transferred from the collecting pipe to the refrigerating component close to the collecting pipe, so that the operation stability of the refrigerating component is affected, the temperature of the refrigerating component is increased, unnecessary energy waste is caused, and the service life of the refrigerating component is affected.
Disclosure of Invention
In order to reduce the energy waste caused to the refrigeration component when carrying out thermal analysis and prolong the service life of the refrigeration component, the application provides a volatile organic compound enrichment pretreatment device.
The application provides a volatile organic compounds enrichment preprocessing device adopts following technical scheme:
the device comprises a refrigerating component, a cold guide component arranged on the refrigerating component, a VOC treatment part arranged on the cold guide component and a heating component arranged at one end of the VOC treatment part far away from the refrigerating component, wherein the heating component is arranged on the VOC treatment part;
the cold guide assembly comprises a bottom cold guide plate arranged on the refrigeration component, a middle cold guide plate arranged on one side of the bottom cold guide plate far away from the refrigeration component, and a plurality of cold guide blocks arranged on the middle cold guide plate;
the VOC treatment part comprises a water removal loop for condensing and removing moisture in VOCs and a trapping loop for condensing and collecting the VOCs, the trapping loop is connected to detection equipment, and the cold guide blocks are arranged in one-to-one correspondence with the trapping loop and the water removal loop;
the bottom cold guide piece and the middle cold guide piece are made of copper materials, and the cold guide blocks are made of aluminum materials.
Through adopting above-mentioned technical scheme, because the specific heat capacity and the coefficient of heat conductivity of copper are all less than aluminium, this makes the cold piece that leads of copper make can be fast with the cold volume transfer for the cold piece that leads of aluminium system, simultaneously, when heating for the pipeline, the heat that comes from the cold piece that leads of aluminium system and do not be difficult to heat the cold piece that leads of copper system, has protected the cold piece of refrigeration part to a certain extent, keeps the steady operation of refrigeration part, promotes the holistic energy utilization efficiency of device.
Optionally, the trapping loop comprises a trapping base arranged on the middle cold guide plate and a trapping U-shaped pipe arranged on the trapping base; the water removal loop comprises a water removal base arranged on the middle cold guide piece and a water removal U-shaped pipe arranged on the water removal base, and one end of the water collection U-shaped pipe is connected to the detection equipment; and each cold guide block is provided with a U-shaped groove for the U-shaped trapping pipe and the U-shaped dewatering pipe to pass through.
By adopting the technical scheme, the corresponding cold guide block is buckled with the trapping base to clamp the trapping U-shaped pipe in the middle, so that the cold generated by the refrigerating component is quickly transferred to the trapping U-shaped pipe; the corresponding cold guide block and the water removal U-shaped pipe are buckled to clamp the water removal U-shaped pipe in the middle, so that the cold generated by the refrigeration component is quickly transferred to the water removal U-shaped pipe.
Optionally, the entrapment U type pipe with the both ends of dewatering U type pipe all overlap and are equipped with the drag reduction pipeline, the drag reduction pipeline is located respectively the junction of entrapment U type pipe and heating element and the junction of dewatering U type pipe and heating element.
Through adopting above-mentioned technical scheme, because the both ends of entrapment U type pipe and dewatering U type pipe are closer to the power, the heating in-process both ends are more easy to generate heat to burn out the nearby part of pipe, drag reduction pipeline has thickened the wall thickness of entrapment U type pipe and dewatering U type pipe, has reduced the resistance of this part, and is more smooth and easy when the electric current flows, has consequently alleviateed the circumstances that the both ends of entrapment U type pipe and dewatering U type pipe easily generate heat, has reduced the damage to nearby part.
Optionally, silver is used at both ends of the drag reduction pipeline, and the drag reduction pipeline is welded and fixed with the trapping U-shaped pipe and the dewatering U-shaped pipe.
By adopting the technical scheme, because silver has better conductive property, the flow of current is more convenient for, and the heating efficiency of the U-shaped trapping pipe and the U-shaped dewatering pipe is higher.
Optionally, the trapping base is provided with a trapping path isolation block for isolating heat, and the trapping U-shaped pipe is fixedly arranged in the trapping path isolation block in a penetrating way;
install the water removal way isolation piece that is used for the isolated heat on the water removal base, the U type pipe of dewatering wears to establish to be fixed in the water removal way isolation piece.
Through adopting above-mentioned technical scheme, when using heating element to heat entrapment U type pipe and dewatering U type pipe, entrapment way insulating piece and dewatering way insulating piece can cause certain blocking to the heat of coming from entrapment U type pipe and dewatering U type pipe transfer, further reduce refrigeration part's heat dissipation, extension refrigeration part's life.
Optionally, a plurality of trapping path isolation blocks are arranged, and the trapping path isolation blocks are arranged at intervals along the radian of the trapping U-shaped pipe;
the water removal way isolation blocks are provided with a plurality of water removal way isolation blocks, and a plurality of water removal way isolation blocks are arranged along the radian interval of the water removal U-shaped pipe.
By adopting the technical scheme, the isolation effect of the trapping path isolation block and the water removal path is better.
Optionally, the trapping path insulating block and the water removing path insulating block are made of polytetrafluoroethylene.
By adopting the technical scheme, the polytetrafluoroethylene has lower heat conducting property and better heat transfer blocking effect.
Optionally, the trapping loops are respectively provided with two groups, including a ms trapping loop connected with a ms mass spectrometer and a fid trapping loop connected with a fid mass spectrometer; the two groups of water removal loops are correspondingly arranged, and the two groups of water removal loops comprise a fid water removal loop and a ms water removal loop.
Through adopting above-mentioned technical scheme, through setting up two sets of entrapment return circuits, and two sets of entrapment return circuits are connected with different mass spectrometers respectively to carry out different analytical detection to the VOCs that condenses in the entrapment U type intraductal, be convenient for carry out comprehensive detection to VOCs.
Optionally, gaskets are arranged between the fid trapping loop and the middle cold guide plate, and between the fid dewatering loop and the middle cold guide plate;
and a heat insulation cushion block is arranged between the ms water removal loop and the middle cold guide plate.
By adopting the technical scheme, as the temperatures required by the cold guide blocks on the fid trapping loop, the ms trapping loop, the fid dewatering loop and the ms dewatering loop are different, the cooling capacity transferred to the fid trapping loop, the ms trapping loop, the fid dewatering loop and the ms dewatering loop by the refrigerating component is regulated by the gaskets and the heat insulation cushion blocks.
In summary, the present application includes at least one of the following beneficial technical effects:
1. by arranging the copper cold guide plate and the aluminum cold guide block, the copper cold guide plate can rapidly transfer cold to the aluminum cold guide block, and meanwhile, when a pipeline is heated, the heat transferred from the aluminum cold guide block is not easy to heat the copper cold guide plate, so that the cold blocks of a refrigeration part are protected to a certain extent, and the overall energy utilization efficiency of the device is improved;
2. through the drag reduction pipeline, the resistance of the joint of the trapping U-shaped pipe and the water removal U-shaped pipe and the heating component can be reduced, the current flow is facilitated, the heating phenomenon generated at the two ends of the trapping U-shaped pipe and the water removal U-shaped pipe is reduced during heating, and the damage to nearby parts is reduced;
3. through the setting of a plurality of entrapment way insulating blocks and a plurality of dewatering way insulating blocks, can further reduce heat transfer to the refrigeration part, prolong the life of refrigeration part.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present application.
Fig. 2 is a schematic diagram of a construction for embodying a collector way insulation block.
Reference numerals illustrate: 1. a refrigerating part; 2. a cold guide assembly; 21. a bottom cold guide plate; 22. a middle cold guide plate; 23. a cold guide block; 231. a U-shaped groove; 3. a capture loop; 31. a fid trapping circuit; 311. a collecting base; 312. capturing the U-shaped pipe; 32. a ms trapping loop; 33. a trapping path isolation block; 4. a water removal loop; 41. a fid water removal loop; 411. a water removal base; 412. a water removal U-shaped pipe; 42. a ms water removal loop; 43. a water removal isolation block; 5. a drag reduction pipeline; 6. a heating assembly; 61. a first heating block; 62. a second heating block; 7. a gasket; 8. a thermal insulation cushion block; 9. and (5) connecting screws.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-2.
The embodiment of the application discloses a volatile organic compound enrichment pretreatment device. Referring to fig. 1, the volatile organic compound enrichment pretreatment device comprises a refrigeration component 1, a cold guide component 2 fixedly connected to the refrigeration component 1, a VOC treatment part arranged on the cold guide component 2, and a heating component 6 arranged at one end of the VOC treatment part far away from the refrigeration component 1.
Referring to fig. 1, the cold guide assembly 2 includes a bottom cold guide plate 21 mounted on the refrigerating part 1, a middle cold guide plate 22 fixedly connected to a side of the bottom cold guide plate 21 remote from the refrigerating part 1, and a plurality of cold guide blocks 23 fixedly connected to the middle cold guide plate 22. Considering the factor of being convenient for change, dismantlement, the bottom leads cold piece 21, middle part and leads cold piece 22, leads cold piece 23 of this application and all pass through connecting screw 9 to be fixed.
Referring to fig. 1 and 2, the voc treatment portion includes a trap circuit 3 and a water removal circuit 4, the trap circuit 3 including a trap base 311 fixedly connected to the middle cold guide plate 22 and a trap U-shaped pipe 312 mounted on the trap base 311; the water removal circuit 4 comprises a water removal base 411 mounted on the middle cold guide plate 22 and a water removal U-shaped pipe 412 mounted on the water removal base 411. Trap base 311 and water removal base 411 parallel arrangement, trap U type pipe 312 level is placed in the top of trap base 311, and water removal U type pipe 412 level is placed in the top of water removal base 411, and the both ends of trap U type pipe 312 and water removal U type pipe 412 are all connected with heating element 6, and the one end of trap U type pipe 312 communicates to check out test set (not shown in the figure) to let in the VOCs sample to be tested to check out test set.
Referring to fig. 1 and 2, the plurality of cold guide blocks 23 and the capturing circuit 3 are arranged in a one-to-one correspondence manner, and each cold guide block 23 is provided with a U-shaped groove 231 for the capturing U-shaped pipe 312 and the dewatering U-shaped pipe 412 to extend out, and the cold guide blocks 23, the capturing base 311 and the dewatering base 411 are respectively buckled and arranged, so that the cold guide blocks 23 and the capturing base 311 clamp the capturing U-shaped pipe 312, and the cold guide blocks 23 and the dewatering base 411 clamp the dewatering U-shaped pipe 412.
Referring to fig. 1, the heating assembly 6 includes a first heating block 61 sleeved on both ends of the trap U-shaped pipe 312 and a second heating block 62 sleeved on both ends of the water removal U-shaped pipe 412. A plurality of resistance wires are fixedly arranged in the first heating block 61 and the second heating block 62 in a penetrating way, and the resistance wires are used for being connected with an external power supply so as to heat the first heating block 61 and the second heating block 62.
When VOC pretreatment is carried out, the refrigeration component 1 is electrified firstly so that the refrigeration component 1 is refrigerated and the generated cold energy is sequentially transmitted to the U-shaped water removal pipe 412 along the bottom cold guide piece 21, the middle cold guide piece 22 and the cold guide block 23, when the temperature in the U-shaped water removal pipe 412 reaches about minus 5 ℃, the moisture in the VOCs in the U-shaped water removal pipe 412 can be gradually condensed on the inner wall of the U-shaped water removal pipe 412, then the VOCs with the moisture removed are blown out from the other end of the U-shaped water removal pipe 412 and enter from one end port of the U-shaped water collection pipe 312, the temperature of the U-shaped water collection pipe 312 gradually drops to be lower along with the continuous refrigeration of the refrigeration component 1, and when the temperature of the U-shaped water collection pipe 312 reaches about minus 150 ℃, the VOCs are condensed on the pipe wall of the U-shaped water collection pipe 312 so as to realize the acquisition of VOCs detection samples. In analytical detection, the first heating block 61 is heated to vaporize the condensed VOCs detection sample and is introduced into the detection apparatus under the action of an external force. After the completion of the desorption, the second heating block 62 is heated to remove ice cubes condensed inside the water removal U-tube 412.
In order to reduce the probability that ice cubes condensed in the water removal U-shaped pipe 412 will block the water removal U-shaped pipe 412, the pipe diameter of the water removal U-shaped pipe 412 should be set as thick as possible within an allowable range, and the pipe diameter of the water removal U-shaped pipe 412 is larger than the pipe diameter of the trapping U-shaped pipe 312 is taken as an example for illustration in the application.
In order to reduce the heat transfer to the cold guide assembly 2 to heat the refrigerating part 1 when the heating assembly 6 heats, the bottom cold guide plate 21 and the middle cold guide plate 22 are made of copper materials, and the plurality of cold guide blocks 23 are made of aluminum materials. Because the specific heat capacity and the heat conductivity of copper are lower than those of aluminum, the copper cold guide plate can rapidly transfer cold to the aluminum cold guide block 23, and meanwhile, when a pipeline is heated, the heat transferred from the aluminum cold guide block 23 is not easy to heat the copper cold guide plate, so that the cold block of the refrigeration part 1 is protected to a certain extent, and the overall energy utilization efficiency of the device is improved.
Referring to fig. 1 and 2, since both ends of the trap U-shaped pipe 312 and the water removal U-shaped pipe 412 are closer to the power source, both ends generate heat more easily during the heating process of the heating assembly 6, thereby burning out nearby parts easily, in order to minimize damage to nearby parts, drag reduction pipelines 5 are respectively sleeved at both ends of the trap U-shaped pipe 312 and the water removal U-shaped pipe 412, the drag reduction pipelines 5 on the trap U-shaped pipe 312 are located at the junction of the trap U-shaped pipe 312 and the first heating block 61, and the drag reduction pipelines 5 on the water removal U-shaped pipe 412 are located at the junction of the water removal U-shaped pipe 412 and the second heating block 62. Because drag reduction pipeline 5 thickens the portion that entrapment U-shaped pipe 312 and dewatering U-shaped pipe 412 are connected with heating element 6 respectively, and then reduced the resistance of this portion for the both ends of entrapment U-shaped pipe 312 and dewatering U-shaped pipe 412 no longer easily generate heat, have effectively protected nearby part.
The two ends of each section of resistance reduction pipeline 5 are fixed by silver welding respectively so as to enhance the conductivity of the trapping U-shaped pipe 312 and the dewatering U-shaped pipe 412, facilitate the heat transfer of the heating component 6 to the trapping U-shaped pipe 312 and the dewatering U-shaped pipe 412 and improve the heating efficiency of the heating component 6.
Referring to fig. 2, in order to further reduce the heat generated by the heating unit 6 from being transferred to the refrigerating unit 1, a trap isolation block 33 for isolating heat is fixedly connected to the trap base 311, and a trap U-shaped pipe 312 is fixedly inserted into the trap isolation block 33; a water removal channel isolation block 43 for isolating heat is fixedly connected on the water removal base 411, and a water removal U-shaped pipe 412 is fixedly arranged in the water removal channel isolation block 43 in a penetrating way. The collecting channel isolation block 33 and the water removing channel isolation block 43 are isolation blocks made of polytetrafluoroethylene materials, the polytetrafluoroethylene materials have lower heat conducting performance, and the collecting channel isolation block is used for isolating heat transfer between the collecting U-shaped pipe 312 and the cold guide block 23 and between the water removing U-shaped pipe 412 and the cold guide block 23, electricity cannot be transferred to the aluminum cold guide block 23 when the heating is electrified, heat transfer to the refrigerating component 1 can be reduced to a certain extent, and the service life of the refrigerating component 1 is prolonged.
The plurality of collecting path isolation blocks 33 are arranged, and the plurality of collecting path isolation blocks 33 are arranged at intervals along the radian of the collecting U-shaped pipe 312; the plurality of water removal channel isolation blocks 43 are also provided, and the plurality of water removal channel isolation blocks 43 are disposed at intervals along the arc of the water removal U-shaped pipe 412 to reduce heat transfer to the refrigeration unit 1 to a greater extent. The present application describes taking the three cases where the collecting path isolation blocks 33 and the water path isolation blocks 43 are all provided, and the three collecting path isolation blocks 33 are all embedded in the U-shaped grooves 231 corresponding to the cold guide blocks 23, and the three water path isolation blocks 43 are also embedded in the U-shaped grooves 231 corresponding to the cold guide blocks 23.
Referring to fig. 1 and 2, in order to perform comprehensive detection on VOCs detection samples condensed in the trapping U-shaped tube 312, the detection device may be provided with multiple groups, and the application is provided with two detection devices, namely, a ms mass spectrometer and a fid mass spectrometer, so that the trapping loop 3 and the dewatering loop 4 are correspondingly provided with two groups, and the two groups of trapping loops 3 and the dewatering loop 4 are fixedly connected on the middle cold guide plate 22, including a ms trapping loop 32 and a ms dewatering loop 42 connected with the ms mass spectrometer, and a fid trapping loop 31 and a fid dewatering loop 41 connected with the fid mass spectrometer, and the structures of the two groups of trapping loops 3 and the two groups of dewatering loops 4 are completely consistent.
Referring to fig. 1 and 2, at the same time, since the temperatures required for the cold guide blocks 23 on the fid trap circuit 31, the ms trap circuit 32, the fid water removal circuit 41, and the ms water removal circuit 42 are different, gaskets 7 are provided between the fid water removal circuit 41 and the fid trap circuit 31, and between the ms water removal circuit 42 and the middle cold guide plate 22, and a thermal insulation cushion 8 is provided between the ms water removal circuit 42 and the middle cold guide plate 22. To adjust the cold energy transfer efficiency of the refrigerating part 1 according to the heat transfer principle.
The implementation principle of the volatile organic compound enrichment pretreatment device in the embodiment of the application is as follows: when in use, the refrigeration component 1 starts refrigeration, and then VOCs are respectively introduced from the ports at one ends of the two water removal U-shaped pipes 412, the cold generated by the refrigeration component 1 gradually reaches the fid trapping loop 31, the ms trapping loop 32, the fid water removal loop 41 and the ms water removal loop 42, when the temperature is reduced to a certain value, the moisture in the VOCs is condensed in the two water removal U-shaped pipes 412, and the VOCs with the moisture removed respectively flow out from the other ends of the two water removal U-shaped pipes 412. Then, the dehumidified VOCs enter the two trapping U-shaped pipes 312 respectively, continue to refrigerate along with the refrigerating unit 1, gradually transfer the cold energy to the trapping U-shaped pipes 312, condense the VOCs on the inner walls of the two trapping U-shaped pipes 312 when the temperatures of the two trapping U-shaped pipes 312 drop to a certain temperature to form detection samples of the VOCs in the two trapping U-shaped pipes 312, and then connect the first heating block 61 with an external power supply, so that the detection samples of the VOCs in the two trapping U-shaped pipes 312 are vaporized and respectively introduced into the ms mass spectrometer and the fid mass spectrometer for detection. After the VOCs detection samples of the two trapping U-shaped pipes 312 all enter the detection apparatus, the connection between the first heating block 61 and the external power supply is cut off, and the connection between the second heating block 62 and the external power supply is turned on, so that the two water removal U-shaped pipes 412 are heated to melt and flow out the ice cubes inside.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (9)
1. A volatile organic compound enrichment pretreatment device is characterized in that: the air conditioner comprises a refrigeration component (1), a cold guide assembly (2) arranged on the refrigeration component (1), a VOC treatment part arranged on the cold guide assembly (2) and a heating assembly (6) arranged at one end of the VOC treatment part far away from the refrigeration component (1);
the cold guide assembly (2) comprises a bottom cold guide sheet (21) arranged on the refrigeration component (1), a middle cold guide sheet (22) arranged on one side of the bottom cold guide sheet (21) far away from the refrigeration component (1) and a plurality of cold guide blocks (23) arranged on the middle cold guide sheet (22);
the VOC treatment part comprises a water removal loop (4) for condensing and removing moisture in VOCs and a trapping loop (3) for condensing and collecting the VOCs, the trapping loop (3) is connected to detection equipment, and the cold guide blocks (23) are arranged in one-to-one correspondence with the trapping loop (3) and the water removal loop (4);
the bottom cold guide piece (21) and the middle cold guide piece (22) are made of copper materials, and the cold guide blocks (23) are made of aluminum materials.
2. The volatile organic compound enrichment pretreatment device according to claim 1, wherein: the trapping loop (3) comprises a trapping base (311) arranged on the middle cold guide sheet (22) and a trapping U-shaped pipe (312) arranged on the trapping base (311); the water removal loop (4) comprises a water removal base (411) arranged on the middle cold guide piece (22) and a water removal U-shaped pipe (412) arranged on the water removal base (411), and one end of the water collection U-shaped pipe (312) is connected to the detection equipment; u-shaped grooves (231) for the U-shaped trapping pipes (312) and the U-shaped dewatering pipes (412) to pass through are formed in each cold guide block (23).
3. The volatile organic compound enrichment pretreatment device according to claim 2, wherein: the anti-drag pipeline (5) is sleeved at both ends of the trapping U-shaped pipe (312) and the water removal U-shaped pipe (412), and the anti-drag pipeline (5) is respectively positioned at the joint of the trapping U-shaped pipe (312) and the heating component (6) and the joint of the water removal U-shaped pipe (412) and the heating component (6).
4. A volatile organic compound enrichment pretreatment device according to claim 3, wherein: both ends of the drag reduction pipeline (5) are welded and fixed with the trapping U-shaped pipe (312) and the dewatering U-shaped pipe (412) by silver.
5. The volatile organic compound enrichment pretreatment device according to claim 4, wherein: the collecting base (311) is provided with a collecting path isolating block (33) for isolating heat, and the collecting U-shaped pipe (312) is fixedly arranged in the collecting path isolating block (33) in a penetrating way;
install on dewatering base (411) and be used for the insulating piece (43) of water removal way of isolated heat, U type pipe (412) of dewatering wear to establish to be fixed in the insulating piece (43) of water removal way.
6. The volatile organic compound enrichment pretreatment device according to claim 5, wherein: the plurality of collecting path isolation blocks (33) are arranged, and the plurality of collecting path isolation blocks (33) are arranged at intervals along the radian of the collecting U-shaped pipe (312);
the water removal channel isolation blocks (43) are provided with a plurality of water removal channel isolation blocks (43) which are arranged along the radian interval of the water removal U-shaped pipe (412).
7. The volatile organic compound enrichment pretreatment device according to claim 6, wherein: the collecting path isolation block (33) and the water removing path isolation block (43) are made of polytetrafluoroethylene.
8. The volatile organic compound enrichment pretreatment device according to claim 2, wherein: the trapping loops (3) are respectively provided with two groups, including a ms trapping loop (32) connected with a ms mass spectrometer and a fid trapping loop (31) connected with a fid mass spectrometer; the water removal loops (4) are correspondingly provided with two groups, including a fid water removal loop (41) and a ms water removal loop (42).
9. The volatile organic compound enrichment pretreatment device according to claim 8, wherein: a gasket (7) is arranged between the fid trapping loop (31) and the middle cold guide sheet (22) and between the fid dewatering loop (41) and the middle cold guide sheet (22);
and a heat insulation cushion block (8) is arranged between the ms water removal loop (42) and the middle cold guide sheet (22).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310052992.1A CN116124567B (en) | 2023-02-03 | 2023-02-03 | Volatile organic compound enrichment pretreatment device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310052992.1A CN116124567B (en) | 2023-02-03 | 2023-02-03 | Volatile organic compound enrichment pretreatment device |
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| CN116124567A CN116124567A (en) | 2023-05-16 |
| CN116124567B true CN116124567B (en) | 2023-06-16 |
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|---|---|---|---|---|
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