CN114034538A - Enrichment device for dioxin detection and use method - Google Patents
Enrichment device for dioxin detection and use method Download PDFInfo
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- CN114034538A CN114034538A CN202111164140.9A CN202111164140A CN114034538A CN 114034538 A CN114034538 A CN 114034538A CN 202111164140 A CN202111164140 A CN 202111164140A CN 114034538 A CN114034538 A CN 114034538A
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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
- G01N1/405—Concentrating samples by adsorption or absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1487—Removing organic compounds
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- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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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
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Abstract
The invention relates to the technical field of dioxin detection, in particular to an enrichment device for dioxin detection and a using method thereof, wherein the enrichment device comprises a machine shell, a particle filtering shell and a containing bottle are arranged in an inner cavity of the machine shell, an inner cavity of the particle filtering shell is communicated with the outer wall of the machine shell and is provided with an air inlet pipe, an air flow sensor is arranged on the air inlet pipe, a filtering mechanism for filtering impurities is arranged in the inner cavity of the particle filtering shell, the containing bottle is used for filling organic solvent which is easy to absorb dioxin, the containing bottle is communicated with the inner cavity of the particle filtering shell and is provided with a conveying pipe, an air pump for pumping filtered gas is arranged on the conveying pipe, one end of the conveying pipe extends to the bottom of the containing bottle, the containing bottle is provided with an upper air outlet pipe, the containing bottle is communicated with the inner cavity of the particle filtering shell and is provided with a return pipe, and valves are arranged on the return pipe and the outlet pipe, the accuracy of dioxin content detection is improved.
Description
Technical Field
The invention relates to the technical field of dioxin detection, in particular to an enrichment device for dioxin detection and a using method thereof.
Background
Dioxin is a colorless, tasteless and severely toxic fat-soluble substance.
The source of dioxin has in the atmospheric environment steel smelting, automobile exhaust, burn aspects such as manufacturing of production and pesticide, it is higher to burn the production and occupy the proportion, in order to control the content of dioxin in the air, the emission standard of national control dioxin, and then need carry out accurate detection to the emission of dioxin, burn the dioxin that produces in the production and exist with gaseous state and two kinds of forms of solid-state, and burn that the dioxin content is lower in the waste gas, hardly collect the dioxin. When detecting the dioxin that produces in the burning waste gas, current detection device mainly collects to the dioxin in the waste gas, ignores the adnexed particulate matter of dioxin in the waste gas, and then causes the dioxin detection data result to hang down on the contrary, detects the content that can not go out the dioxin even, consequently how to design a high efficiency and gather together the dioxin and carry out the device that detects to the dioxin proportion in the waste gas and become the technical problem that awaits the solution in order to this field technical staff urgently.
Disclosure of Invention
In view of this, the present invention aims to provide an enrichment device for detecting dioxin and a use method thereof, so as to improve the accuracy of detecting the content of dioxin.
In order to solve the technical problems, the technical scheme of the invention is as follows:
an enrichment device for dioxin detection and a using method thereof comprise a casing, wherein a particle filtering shell and a containing bottle are arranged in an inner cavity of the casing, an air inlet pipe is arranged for communicating the inner cavity of the particle filtering shell with the outer wall of the casing, a gas flow sensor is arranged on the air inlet pipe, a filtering mechanism for filtering impurities is arranged in the inner cavity of the particle filtering shell, the containing bottle is used for filling organic solvent which is easy to absorb dioxin, a conveying pipe is arranged for communicating the containing bottle with the inner cavity of the particle filtering shell, an air pump for extracting filtered gas is arranged on the conveying pipe, one end of the conveying pipe extends to the bottom of the containing bottle, the containing bottle is provided with an upper air outlet pipe, the lower end of the air outlet pipe is positioned at the upper part of the containing bottle, the upper end of the air outlet pipe penetrates through the casing to extend to the outer side of the casing, so that the containing bottle is communicated with the outside, and a return pipe is arranged for communicating the containing bottle with the inner cavity of the particle filtering shell, the backflow pipe and the air outlet pipe are provided with valves, the inner cavity of the particle filtering shell is communicated with the outer wall of the shell and is provided with a pipeline with a sealing piece, after detection is finished, the pipeline is opened, the filtering mechanism extends out of the shell through the pipeline, and the organic solvent flows to the inner cavity of the particle filtering shell through the backflow pipe and flows out of the pipeline.
According to the device, the impurities in the combustion waste gas are filtered through the filtering mechanism, the dioxin attached to impurity particles is effectively collected, meanwhile, the dioxin in the waste gas is absorbed through the containing bottle for storing the organic solvent, so that the solid and gaseous dioxin can be doubly collected, and compared with the traditional dioxin collecting device, the device improves the collection rate of the dioxin;
after the gas collection is finished, the valve on the return pipe is opened, the pressure inside the storage bottle is greater than that in the inner cavity of the particle filtering shell, the organic solvent enters the inner cavity of the particle filtering shell through the return pipe and adsorbs attached dioxin, the organic solvent is fully utilized, the residue of the dioxin in equipment is reduced, and the data accuracy is improved;
through gas flow sensor, can detect the waste gas that burns in the entering equipment, adnexed dioxin on organic solvent and the particulate matter is drawed to the entering volume of accurate record waste gas, and then realizes the accurate calculation of dioxin content in the waste gas, reduces detection error.
Further, the filtering mechanism comprises a fiber filtering membrane and a folding frame for fixing the fiber filtering membrane.
Further, the folding leg includes first arc pole, second arc pole, first dwang, second dwang, the first end of first arc pole is articulated with the first end of second arc pole, the second end of first arc pole is articulated with the first end of first dwang, the second end of second arc pole is articulated with the first end of second dwang, the second end of first dwang is articulated with the second end of second dwang.
Further, the first end of first arc pole and the first end rotation of second arc pole are equipped with first pivot, the cover is equipped with first torsional spring in the first pivot, first torsional spring provides power for the expansion of first arc pole and second arc pole.
Further, it is equipped with the second pivot to rotate between the second end of first dwang and the second end of second dwang, the cover is equipped with the second torsional spring in the second pivot, the second torsional spring provides power for the restoration of first dwang and second dwang.
Furthermore, be connected with the push rod that upwards extends the casing on first dwang or the second dwang, the outer wall and casing and the particle filtration casing sliding connection of push rod.
Furthermore, a second sealing ring sleeved on the outer side of the push rod is arranged on the particle filtering shell.
Further, the bottom end of the storage bottle is higher than the top end of the particle filtering shell, a first valve is installed on the air outlet pipe, and a second valve is installed on the return pipe.
Further, the seal groove that communicates with the intake pipe is seted up to the inner chamber of particle filtration casing, the seal groove lateral wall is equipped with sealed pivot, it is equipped with intake pipe confined closing plate to rotate in the sealed pivot, the cover is equipped with the third torsional spring in the sealed pivot, the one end and the closing plate of third torsional spring are fixed, its other end and seal groove lateral wall fixed connection.
The invention also provides an enrichment method for dioxin detection, which is used for enriching by utilizing the enrichment device for dioxin detection.
Further, when the enrichment device for detecting dioxin is in an initial state, the organic solvent is injected into the containing bottle, one end of the gas conveying pipe extends to a position below the liquid level of the organic solvent in the containing bottle, the lower end of the gas outlet pipe is higher than the liquid level of the organic solvent, the gas inlet pipe is closed, the lower end of the pipeline is closed, the first torsion spring, the second torsion spring and the third torsion spring are all in a free state, the first valve and the second valve are both closed, and the gas inlet pipe is connected with the combustion waste gas discharge channel; the using method comprises the following specific steps:
s1: starting an air pump and an air flow sensor, wherein the air pump absorbs air in the inner cavity of the particle filtering shell to realize that negative pressure is generated in the inner cavity of the particle filtering shell;
s2: when the pressure in the inner cavity of the particle filtering shell reaches a threshold value, the sealing plate rotates around the sealing rotating shaft to open the air inlet pipe, and the third torsion spring is used for torsion and force storage;
s3: the gas flow sensor detects the inflow amount of waste gas, the combustion waste gas filters impurities through a fiber filter membrane, the waste gas is conveyed to the containing bottle through the air pump, dioxin in the waste gas is absorbed by an organic solvent in the containing bottle, and the rest waste gas is reserved in the containing bottle to increase the internal pressure of the containing bottle and prolong the reaction time of the dioxin and the organic solvent;
s4: after a period of time, stopping driving the air pump, closing the air inlet pipe in time by the sealing plate under the action of the torsional moment of the third torsion spring, opening the pipeline, and reinstalling a pure storage bottle on the pipeline;
s5: the first rotating rod or the second rotating rod is pushed by the push rod to rotate around the second rotating shaft, the second torsion spring twists, the fiber filter membrane is folded and stored, the first arc-shaped rod and the second arc-shaped rod are abutted to the inner wall of the particle filter shell and rotate around the first rotating shaft, the first torsion spring twists, the folding frame realizes the folding process and extends out of the shell to a pure storage bottle through a pipeline;
s6: opening a second valve, using the pressure inside the containing bottle to flow the organic solvent which has absorbed the dioxin into the inner cavity of the particle filtering shell through the backflow pipe, opening the first valve when the pressure inside the containing bottle is balanced with the pressure inside the inner cavity of the particle filtering shell, using the height difference to realize that the organic solvent completely enters the inner cavity of the particle filtering shell, and using the organic solvent to absorb the dioxin absorbed by the inner cavity of the particle filtering shell and flow the dioxin into a pure containing bottle through a pipeline;
s7: standing for a period of time to ensure that the dioxin is fully absorbed by the organic solvent;
s8: and detecting the amount of the combustion waste gas entering the equipment according to the gas flow sensor, detecting the collected dioxin, and accurately calculating the proportion of the dioxin in the combustion waste gas.
The invention also provides an enrichment method for dioxin detection, which comprises the following steps:
s1: filtering particles in the waste gas, and collecting dioxin in the filtered waste gas by using an organic solvent to obtain a first mixed solution;
s2: and collecting the dioxin adsorbed on the filtered particles by using the organic solvent in the S1 to obtain a second mixed solution, namely finishing the dioxin enrichment.
The invention also provides a dioxin detection system which comprises the enrichment device for dioxin detection.
Preferably, the dioxin detection system further comprises a dioxin content measuring device.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is an enlarged view of A in FIG. 2;
FIG. 4 is an enlarged view of B in FIG. 2;
FIG. 5 is a schematic structural view of a filter membrane folding stand;
FIG. 6 is an enlarged view of C in FIG. 2;
FIG. 7 is an exploded view of FIG. 6;
fig. 8 is an enlarged schematic view of D in fig. 2.
Reference numerals: 11. a housing; 12. a pipeline; 121. a threaded plug; 20. a particulate filter housing; 21. a guide hole; 30. a push rod; 31. a first arcuate bar; 32. a second arcuate bar; 33. a first rotating shaft; 34. a first torsion spring; 35. a first rotating lever; 36. a second rotating lever; 37. a second rotating shaft; 38. a second torsion spring; 39. a glass fiber filter membrane; 40. a storage bottle; 41. a return pipe; 42. an air outlet pipe; 43. a delivery pipe; 44. an air pump; 45. a first valve; 46. a second valve; 50. a sealing groove; 51. sealing the rotating shaft; 52. a sealing plate; 53. a third torsion spring; 61. an air inlet pipe; 62. a gas flow sensor; 63. a connector; 64. a first seal ring; 7. and a second seal ring.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in order to make the technical solution of the present invention easier to understand and understand.
Example (b):
the embodiment provides an enrichment device for dioxin detection and a using method thereof, which are mainly used for collection and detection of dioxin, and improve the accuracy of dioxin detection data.
Including casing 11, install particle filtration casing 20 and receiving bottle 40 in the inner chamber of casing 11, receiving bottle 40 chooses the steel bottle of high pressure resistant for use, the inner chamber of particle filtration casing 20 is equipped with intake pipe 61 with the outer wall intercommunication of casing 11, as shown in figure 6, install the gas flow sensor 62 that detects the air input on the intake pipe 61, be equipped with the filtering mechanism who filters impurity in the inner chamber of particle filtration casing 20, receiving bottle 40 is used for filling the organic solvent who easily absorbs dioxin, receiving bottle 40 is equipped with conveyer pipe 43 with the inner chamber intercommunication of particle filtration casing 20, install the air pump 44 that is used for extracting the gas after being filtered by filtering mechanism on the conveyer pipe 43, the lower extreme of the conveyer pipe 43 inside receiving bottle 40 extends to the bottom of receiving bottle 40, is equipped with outlet duct 42 in receiving bottle 40, the lower extreme of outlet duct 42 is located the upper portion of receiving bottle 40, the upper end of outlet duct 42 passes casing 11 extends to the casing 11 outside for storage bottle 40 and external intercommunication, storage bottle 40 with the inner chamber intercommunication of particle filtration casing 20 is equipped with back flow 41, back flow 41 and all be equipped with the valve on the outlet duct 42, the inner chamber and the casing 11 outer wall intercommunication of particle filtration casing 20 are equipped with pipeline 12, the inside spiral of pipeline 12 is equipped with pipeline 12 confined screw plug 121, and air pump 44 stops work the back, opens pipeline 12, filtering mechanism passes through pipeline 12 extends casing 11, and the valve on the back flow 41 is opened, and organic solvent flows to the inner chamber of particle filtration casing 20 and flows from pipeline 12 through back flow 41, reduces the absorption of the inside dioxin of equipment.
Specifically, the method comprises the following steps:
in order to filter impurities in the gas, as shown in fig. 5, the filtering mechanism includes a fiber filter membrane and a folding frame for fixing the fiber filter membrane, the fiber filter membrane is a glass fiber filter membrane 39, and at least one layer of the glass fiber filter membrane 39 is provided, or at least one folding frame is provided.
In order to realize the folding of folding leg, it is shown in fig. 5 to combine, the folding leg includes first arc pole 31, second arc pole 32, first dwang 35, second dwang 36, the first end of first arc pole 31 is articulated with the first end of second arc pole 32, the second end of first arc pole 31 is articulated with the first end of first dwang 35, the second end of second arc pole 32 is articulated with the first end of second dwang 36, the second end of first dwang 35 is articulated with the second end of second dwang 36.
Through the aforesaid setting, realize the equipment of folding leg through articulated mode, first dwang 35 or second dwang 36 hinged position receive during decurrent pressure, first dwang 35 and second dwang 36 rotate round the pin joint, the folding emergence deformation of glass fiber filter membrane 39 this moment, when first dwang 35 rotates to extreme position with second dwang 36, promote the inner wall butt of first arc pole 31 and second arc pole 32 and particle filter casing 20, make first arc pole 31 and second arc pole 32 rotate round pin joint between them, and then realize the folding of folding leg.
In order to reset the first arc-shaped rod 31 and the second arc-shaped rod 32, in this embodiment, as shown in fig. 4 and 5, a first rotating shaft 33 is rotatably disposed at a first end of the first arc-shaped rod 31 and a first end of the second arc-shaped rod 32, a first torsion spring 34 is sleeved on the first rotating shaft 33, and the first torsion spring 34 provides power for unfolding the first arc-shaped rod 31 and the second arc-shaped rod 32.
Through the above arrangement, after the extrusion forces received by the first arc rod 31 and the second arc rod 32 disappear, the first torsion spring 34 provides a torsion moment for the first arc rod 31 and the second arc rod 32, so that the first arc rod 31 and the second arc rod 32 are reset, and the glass fiber filter membrane 39 is unfolded.
In order to realize the reset of the first rotating rod 35 and the second rotating rod 36, in this embodiment, as shown in fig. 4 and 5, a second rotating shaft 37 is arranged between the second end of the first rotating rod 35 and the second end of the second rotating rod 36 in a rotating manner, a second torsion spring 38 is sleeved on the second rotating shaft 37, and the second torsion spring 38 provides power for the reset of the first rotating rod 35 and the second rotating rod 36.
With the above arrangement, when the pushing force applied to the first rotating lever 35 and the second rotating lever 36 disappears, the second torsion spring 38 provides a torsion moment to reset the first rotating lever 35 and the second rotating lever 36.
In order to extend the filtering mechanism out of the housing 11, in this embodiment, as shown in fig. 2, a push rod 30 extending out of the housing 11 upwards is connected to the first rotating rod 35, and the outer wall of the push rod 30 is slidably connected to the housing 11 and the particle filtering shell 20.
Through the arrangement, after the pipeline 12 is opened, the push rod 30 is pushed downwards, so that downward pressure is applied to the first rotating rod 35, the folding of the folding frame and the glass fiber filter membrane 39 is realized, and the filtering mechanism is pushed to extend out of the machine shell 11.
In order to seal the inner cavity of the particle filtering housing 20, in this embodiment, as shown in fig. 4, the particle filtering housing 20 is provided with a second sealing ring 7 which is sleeved outside the push rod 30, so as to effectively prevent the gas inside the inner cavity of the particle filtering housing 20 from leaking outwards through the gap between the push rod 30 and the particle filtering housing 20.
In order to completely flow the organic solvent inside the receiving bottle 40 into the inner cavity of the particle filtering housing 20 and flow out through the pipe 12, in this embodiment, as shown in fig. 2 and 3, the bottom end of the receiving bottle 40 is higher than the top end of the particle filtering housing 20, the outlet pipe 42 is provided with a first valve 45, and the return pipe 41 is provided with a second valve 46.
Through the arrangement, the bottom end of the containing bottle 40 is higher than the top end of the particle filtering shell 20, and when no pressure difference exists between the containing bottle 40 and the inner cavity of the particle filtering shell 20, the first valve 45 is opened, so that the organic solvent in the containing bottle 40 can smoothly flow into the inner cavity of the particle filtering shell 20; in the normal course of the work, after air pump 44 stop work, open second valve 46, because the inside accumulation waste gas of storage bottle 40 causes storage bottle 40 inner chamber pressure to be greater than the pressure of particle filtration casing 20 inner chamber, organic solvent flows to the inner chamber of particle filtration casing 20 through back flow 41 this moment, first valve 45 closes, the inside gas of restriction storage bottle 40 outwards leaks, the inside pressure of bottle 40 is accomodate in the increase, make the dioxin in the waste gas fully react with organic solvent simultaneously, guarantee the abundant absorption of dioxin in the waste gas.
In order to control the opening and closing of the air inlet pipe 61, in this embodiment, as shown in fig. 6 and 7, a sealing groove 50 communicated with the air inlet pipe 61 is formed in an inner cavity of the particle filtering casing 20, a sealing rotating shaft 51 is arranged on a side wall of the sealing groove 50, a sealing plate 52 for sealing the air inlet pipe 61 is rotatably arranged on the sealing rotating shaft 51, a third torsion spring 53 is sleeved on the sealing rotating shaft 51, one end of the third torsion spring 53 is fixed to the sealing plate 52, and the other end of the third torsion spring is fixedly connected to a side wall of the sealing groove 50.
Through the above arrangement, when the air pump 44 is started, the air pump 44 pumps the air in the inner cavity of the particle filtering shell 20, so that the inner cavity of the particle filtering shell 20 generates negative pressure, when the pressure in the inner cavity of the particle filtering shell 20 reaches a threshold value, a pressure difference exists between two sides of the sealing plate 52, the external air flows to the inner cavity of the particle filtering shell 20 through the air inlet pipe 61, the sealing plate 52 rotates around the sealing rotating shaft 51 to drive the third torsion spring 53 to twist, and further the air inlet pipe 61 is opened, when the air pump 44 stops working, the pressure in the inner cavity of the particle filtering shell 20 is reduced, at this time, the third torsion spring 53 drives the sealing plate 52 to rotate around the sealing rotating shaft 51, the air inlet pipe 61 is closed again, and the waste gas is limited from entering the inner cavity of the particle filtering shell 20.
In order to realize the connection between the air inlet pipe 61 and the external device, in this embodiment, as shown in fig. 8, the end of the air inlet pipe 61 is sleeved with a connector 63, and a first sealing ring 64 is arranged between the connector 63 and the end of the air inlet pipe 61.
Through the setting, be connected with external equipment through connector 63, connector 63 and first sealing washer 64 butt prevent that junction waste gas from leaking this moment.
The implementation principle is as follows: the threaded plug 121 seals the pipeline 12, the organic solvent is injected into the containing bottle 40, one end of the gas pipe 43 extends to a position below the liquid level of the organic solvent in the containing bottle 40, the lower end of the gas outlet pipe 42 is higher than the liquid level of the organic solvent, the gas inlet pipe 61 is closed, the lower end of the pipeline 12 is sealed, the first torsion spring 34, the second torsion spring 38 and the third torsion spring 53 are all in a free state, the first valve 45 and the second valve 46 are closed, and the gas inlet pipe 61 is connected with a combustion waste gas discharge channel;
s1: starting the air pump 44 and the air flow sensor 62, wherein the air pump 44 sucks air in the inner cavity of the particle filtering shell 20 to realize that negative pressure is generated in the inner cavity of the particle filtering shell 20;
s2: when the pressure in the inner cavity of the particle filtering shell 20 reaches a threshold value, the sealing plate 52 rotates around the sealing rotating shaft 51 to open the air inlet pipe 61, and the third torsion spring 53 twists to store force;
s3: the gas flow sensor 62 detects the inflow amount of the exhaust gas, the combustion exhaust gas filters impurities through a fiber filter membrane, the exhaust gas is conveyed to the receiving bottle 40 through the air pump 44, dioxin in the exhaust gas is absorbed by the organic solvent in the receiving bottle 40, and the rest exhaust gas is left in the receiving bottle 40 to increase the internal pressure of the receiving bottle 40 and prolong the reaction time of the dioxin and the organic solvent;
s4: after a period of time, stopping driving the air pump 44, at this time, the air inlet pipe 61 is closed by the sealing plate 52 in time under the action of the torsional moment of the third torsion spring 53, the pipeline 12 is opened, and a pure storage bottle is mounted on the pipeline 12 again;
s5: the push rod 30 pushes the first rotating rod 35 or the second rotating rod 36 to rotate around the second rotating shaft 37, the second torsion spring 38 is twisted, the fiber filter membrane is folded and stored, the first arc-shaped rod 31 and the second arc-shaped rod 32 are abutted against the inner wall of the particle filter shell 20 and rotate around the first rotating shaft 33, the first torsion spring 34 is twisted, the folding frame realizes the folding process and extends out of the machine shell 11 to a pure storage bottle through the pipeline 12;
s6: opening the second valve 46, using the internal pressure of the receiving bottle 40 to make the organic solvent which has absorbed the dioxin flow into the inner cavity of the particle filtering housing 20 through the return pipe 41, and when the internal pressure of the receiving bottle 40 is balanced with the pressure of the inner cavity of the particle filtering housing 20, opening the first valve 45, using the height difference to make the organic solvent completely enter the inner cavity of the particle filtering housing 20, and making the organic solvent absorb the dioxin absorbed by the inner cavity of the particle filtering housing 20 and flow into a pure receiving bottle through the pipeline 12;
s7: standing for a period of time to ensure that the dioxin is fully absorbed by the organic solvent;
s8: according to the amount of the combustion exhaust gas entering the equipment detected by the gas flow sensor 62, the dioxin collected by the equipment is extracted for accurately calculating the proportion of the dioxin in the combustion exhaust gas.
The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of the present invention.
Claims (10)
1. The utility model provides an enrichment device is used in dioxin detection, includes casing (11), its characterized in that: install particle filtration casing (20) and receiving bottle (40) in the inner chamber of casing (11), the inner chamber of particle filtration casing (20) is equipped with intake pipe (61) with the outer wall intercommunication of casing (11), install gas flow sensor (62) on intake pipe (61), be equipped with the filtering mechanism who filters impurity in the inner chamber of particle filtration casing (20), receiving bottle (40) are used for filling the organic solvent of easily absorbing dioxin, receiving bottle (40) is equipped with conveyer pipe (43) with the inner chamber intercommunication of particle filtration casing (20), install air pump (44) that are used for extracting the gas after filtering on conveyer pipe (43), the one end of conveyer pipe (43) extends to the bottom of receiving bottle (40), and receiving bottle (40) are equipped with outlet duct (42), the lower extreme of outlet duct (42) is located receiving bottle (40) upper portion, the upper end of the particle filter shell penetrates through the machine shell (11) and extends to the outer side of the machine shell (11), so that the containing bottle (40) is communicated with the outside, a return pipe (41) is communicated with the inner cavity of the particle filter shell (20), valves are arranged on the return pipe (41) and the air outlet pipe (42), and a pipeline (12) with a sealing piece is communicated with the outer wall of the machine shell (11) and arranged in the inner cavity of the particle filter shell (20).
2. The enrichment device for dioxin detection according to claim 1, characterized in that: the filtering mechanism comprises a fiber filter membrane and a folding frame for fixing the fiber filter membrane.
3. The enrichment device for dioxin detection according to claim 2, characterized in that: the folding leg includes first arc pole (31), second arc pole (32), first dwang (35), second dwang (36), the first end of first arc pole (31) is articulated with the first end of second arc pole (32), the second end of first arc pole (31) is articulated with the first end of first dwang (35), the second end of second arc pole (32) is articulated with the first end of second dwang (36), the second end of first dwang (35) is articulated with the second end of second dwang (36).
4. The enrichment device for dioxin detection according to claim 3, characterized in that: the first end of first arc pole (31) and the first end rotation of second arc pole (32) are equipped with first pivot (33), the cover is equipped with first torsional spring (34) on first pivot (33), first torsional spring (34) provide power for the expansion of first arc pole (31) and second arc pole (32).
5. The enrichment device for dioxin detection according to claim 3, characterized in that: rotate between the second end of first dwang (35) and the second end of second dwang (36) and be equipped with second pivot (37), the cover is equipped with second torsional spring (38) in second pivot (37), second torsional spring (38) provide power for the reseing of first dwang (35) and second dwang (36).
6. The enrichment device for dioxin detection according to claim 3, characterized in that: the particle filter is characterized in that a push rod (30) extending upwards out of the machine shell (11) is connected to the first rotating rod (35) or the second rotating rod (36), and the outer wall of the push rod (30) is connected with the machine shell (11) and the particle filter shell (20) in a sliding mode.
7. The enrichment device for dioxin detection according to claim 6, characterized in that: and a second sealing ring (7) sleeved on the outer side of the push rod (30) is arranged on the particle filtering shell (20).
8. The enrichment device for dioxin detection according to claim 1, characterized in that: the bottom end of the storage bottle (40) is higher than the top end of the particle filtering shell (20), the air outlet pipe (42) is provided with a first valve (45), and the return pipe (41) is provided with a second valve (46).
9. The enrichment device for dioxin detection according to claim 1, characterized in that: seal groove (50) with intake pipe (61) intercommunication are seted up to the inner chamber of particle filtration casing (20), seal groove (50) lateral wall is equipped with sealed pivot (51), it is equipped with intake pipe (61) confined closing plate (52) to rotate on sealed pivot (51), the cover is equipped with third torsional spring (53) on sealed pivot (51), the one end and the closing plate (52) of third torsional spring (53) are fixed, its other end and seal groove (50) lateral wall fixed connection.
10. The use method of an enrichment device for dioxin detection according to any one of claims 1 to 9, characterized in that: when the enrichment device for detecting dioxin is in an initial state, an organic solvent which is easy to absorb dioxin is injected into the containing bottle (40), so that one end of the gas pipe (43) extends to a position below the liquid level of the organic solvent in the containing bottle (40), the lower end of the gas outlet pipe (42) is higher than the liquid level of the organic solvent, the gas inlet pipe (61) is closed, the lower end of the pipeline (12) is closed, the first torsion spring (34), the second torsion spring (38) and the third torsion spring (53) are all in a free state, the first valve (45) and the second valve (46) are both closed, and the gas inlet pipe (61) is connected with a combustion waste gas discharge channel; the using method comprises the following specific steps:
s1: starting the air pump (44) and the air flow sensor (62), wherein the air pump (44) sucks air in the inner cavity of the particle filtering shell (20) to realize that negative pressure is generated in the inner cavity of the particle filtering shell (20);
s2: when the pressure in the inner cavity of the particle filtering shell (20) reaches a threshold value, the sealing plate (52) rotates around the sealing rotating shaft (51) to open the air inlet pipe (61), and the third torsion spring (53) twists to store force;
s3: the gas flow sensor (62) detects the inflow of waste gas, the combustion waste gas filters impurities through a fiber filter membrane, the waste gas is conveyed to the containing bottle (40) through the air pump (44), dioxin in the waste gas is absorbed by an organic solvent in the containing bottle (40), and the rest waste gas is reserved in the containing bottle (40) to increase the internal pressure of the containing bottle (40) and prolong the reaction time of the dioxin and the organic solvent;
s4: after a period of time, stopping driving the air pump (44), closing the air inlet pipe (61) by the sealing plate (52) in time under the action of the torsional moment of the third torsion spring (53), opening the pipeline (12), and reinstalling a pure storage bottle on the pipeline (12);
s5: the first rotating rod (35) or the second rotating rod (36) is pushed to rotate around the second rotating shaft (37) through the push rod (30), the second torsion spring (38) is twisted, the fiber filter membrane is folded and stored, the first arc-shaped rod (31) and the second arc-shaped rod (32) are abutted to the inner wall of the particle filter shell (20) and rotate around the first rotating shaft (33), the first torsion spring (34) is twisted, the folding process is realized by the folding frame, and the folding frame extends out of the machine shell (11) to a pure storage bottle through the pipeline (12);
s6: opening a second valve (46), utilizing the internal pressure of the containing bottle (40) to make the organic solvent which has absorbed the dioxin flow into the inner cavity of the particle filtering shell (20) through a return pipe (41), when the internal pressure of the containing bottle (40) is balanced with the pressure of the inner cavity of the particle filtering shell (20), opening a first valve (45), utilizing the height difference to make the organic solvent completely enter the inner cavity of the particle filtering shell (20), and enabling the organic solvent to absorb the dioxin absorbed by the inner cavity of the particle filtering shell (20) and flow into a pure containing bottle through a pipeline (12);
s7: standing for a period of time to ensure that the dioxin is fully absorbed by the organic solvent;
s8: the amount of the combustion exhaust gas entering the equipment is detected according to a gas flow sensor (62), and the collected dioxin is detected and used for accurately calculating the proportion of the dioxin in the combustion exhaust gas.
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