CN110665330B - Ion mobility spectrometry purifying tube circulating regeneration system and working method thereof - Google Patents
Ion mobility spectrometry purifying tube circulating regeneration system and working method thereof Download PDFInfo
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- CN110665330B CN110665330B CN201911086414.XA CN201911086414A CN110665330B CN 110665330 B CN110665330 B CN 110665330B CN 201911086414 A CN201911086414 A CN 201911086414A CN 110665330 B CN110665330 B CN 110665330B
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- 238000001871 ion mobility spectroscopy Methods 0.000 title claims abstract description 69
- 238000011069 regeneration method Methods 0.000 title claims abstract description 64
- 230000008929 regeneration Effects 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims description 32
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 230000001172 regenerating effect Effects 0.000 claims abstract description 7
- 238000000746 purification Methods 0.000 claims description 25
- 230000008569 process Effects 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 16
- 239000012629 purifying agent Substances 0.000 claims description 12
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 11
- 239000002808 molecular sieve Substances 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 8
- 229920002379 silicone rubber Polymers 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims description 4
- 239000004964 aerogel Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 claims description 2
- 239000012774 insulation material Substances 0.000 claims description 2
- 239000011707 mineral Substances 0.000 claims description 2
- 239000000741 silica gel Substances 0.000 claims description 2
- 229910002027 silica gel Inorganic materials 0.000 claims description 2
- 239000002516 radical scavenger Substances 0.000 claims 2
- 239000011491 glass wool Substances 0.000 claims 1
- 238000010926 purge Methods 0.000 description 43
- 238000004891 communication Methods 0.000 description 15
- 239000000284 extract Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000002274 desiccant Substances 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
Classifications
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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
- B01D53/02—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 adsorption, e.g. preparative gas chromatography
-
- 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
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
- G01N27/622—Ion mobility spectrometry
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Gases By Adsorption (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The invention provides an ion mobility spectrometry purifying tube circulating regeneration system, which comprises: the device comprises a gas circuit conversion module, a purifying tube regeneration module, a sensor module and a control module; the purifying tube regeneration module comprises two purifying tubes which are parallel; the purifying pipe is connected with the equipment main body through an electromagnetic control valve, and the front end and the rear end of the purifying pipe are respectively provided with an air inlet valve and an air outlet valve which can be directly communicated with the atmosphere; the gas path conversion module comprises an air inlet valve, an air outlet valve and a conversion valve; the purifying tubular state can be switched into working, regenerating and standby by changing the working state of the electromagnetic valve in the gas circuit; the sensor module comprises a humidity sensor arranged in the air path; the control module is connected with all other modules in a control way, receives the air passage state parameters, controls the air passage conversion module and the purifying tube regeneration module according to the collected air passage state parameters, issues control instructions and switches the working state of the purifying tube. The system can be stably used for a long time and has high regeneration efficiency.
Description
Technical Field
The invention relates to an ion mobility spectrometry detection technology in the field of chemical analysis, in particular to a circulating regeneration system and a circulating regeneration method of an ion mobility spectrometry purifying tube.
Background
Ion mobility spectrometers often operate in an atmospheric environment with air as a source of air, but moisture and other impurities are present in the air and, if not controlled, the data measured by the instrument is difficult to reproduce and compare. The purifying pipe device filled with the purifying agent can effectively eliminate the influence, namely, the purifying agent absorbs moisture and impurities in the gas and purifies the gas entering the instrument, but the service life of the purifying agent is limited, so that the frequent replacing work of the purifying agent is very complicated in order to maintain the long-term stable working state of the instrument, and therefore, the research on a circulating and regenerating system of the purifying pipe capable of working stably for a long time is very necessary.
The existing renewable ion mobility spectrometry purification device generally uses two parallel purification pipes, and can be divided into two types, wherein the first type is to isolate the two purification pipes, namely, one purification pipe continues to purify gas by switching electromagnetic valves, the other purification pipe is heated and regenerated, absorbed water vapor leaves the purification pipe in a free diffusion mode, the regeneration efficiency of the method is low, and the water vapor is difficult to completely strip from the purification pipe; the second type is that two purifying pipes are connected in series with an ion mobility spectrometer to directly extract air, the purifying air purified by the first purifying pipe is used for purging the second purifying pipe which is heated and regenerated, and water vapor is directly discharged into the air through an exhaust port.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provide an ion mobility spectrometry purifying tube circulating regeneration system and a working method thereof.
The technical scheme of the invention for solving the problems is as follows:
an ion mobility spectrometry purifying tube circulating regeneration system:
an ion mobility spectrometry purification tube recycling system, comprising: the device comprises a gas circuit conversion module 200, a purifying tube regeneration module 100, a sensor module 300 and a control module 400;
the purifying tube regeneration module comprises two purifying tubes 101 and 102 which are arranged in parallel; the purifying pipe is connected with the equipment main body through an electromagnetic control valve, and the front end and the rear end of the purifying pipe are respectively provided with an air inlet valve and an air outlet valve which can be directly communicated with the atmosphere;
the gas path conversion module comprises an air inlet valve, an air outlet valve and a conversion valve; the purifying tubular state can be switched into working, regenerating and standby by changing the working state of the electromagnetic valve in the gas circuit;
the sensor module comprises a humidity sensor arranged in the air path;
the control module is connected with all other modules in a control way, receives the air passage state parameters, controls the air passage conversion module and the purifying tube regeneration module according to the collected air passage state parameters, issues control instructions and switches the working state of the purifying tube.
The ion mobility spectrometry purifying tube recycling system according to claim 1, wherein the purifying tube is internally filled with a dust-filtering wet-filtering purifying agent filler; the outer wall of the purifying tube is provided with a silicon rubber heating sheet.
The outside of the silicon rubber heating sheet is provided with a layer of heat preservation and heat insulation material.
The heat-insulating material is one of aerogel heat-insulating felt, glass fiber cotton, aluminum silicate fiber and vacuum heat-insulating plate
The silicon rubber heating sheet is embedded with a temperature sensor which is connected with the control module.
The purifying pipe is filled with a dust-filtering wet-filtering purifying agent filler, and the purifying agent filler is one of an active mineral purifying agent, silica gel and a molecular sieve.
A working method of an ion mobility spectrometry purifying tube circulating regeneration system,
the sensor module 300 monitors the humidity of the drifting air in real time through a humidity sensor arranged in the air channel, feeds humidity parameter information back to the control module 400, the control module receives air channel state parameters and issues control instructions, and when the humidity parameters reach a set threshold value, the control module 400 simultaneously sends the control instructions to the air channel conversion module 200 and the purifying tube regeneration module 100 to switch the purifying tube into different working states:
(1) The purifying pipes 101 are in series connection for operation, and the purifying pipes 102 are regenerated;
(2) The purifying pipe 101 circularly works, and the purifying pipe 102 is used for later use;
(3) The purifying pipe 101 is regenerated, and the purifying pipes 102 are connected in series to work;
(4) The purifying pipe 101 is used, and the purifying pipe 102 is circularly operated.
The purifying pipes 101 are in series connection for operation, and the purifying pipes 102 are regenerated; the exhaust valve of the purifying pipe 102 and the air inlet valve of the purifying pipe 101 are opened, the direction of the switching valve is switched, the air passage is directly communicated with the atmosphere, air is pumped into the air passage through the air inlet valve, and a unidirectional serial air passage is formed through the purifying pipe 101, the air pump, the ion mobility spectrometry main body and the purifying pipe 102, and regenerated moisture is directly discharged through the exhaust valve.
The purifying pipe 101 circularly works, and the purifying pipe 102 is used for later use; after the purification tube 102 is regenerated, the air inlet valve and the air outlet valve are closed, and the direction of the switching valve is switched, so that the purification tube 101, the ion mobility spectrometry main body, the air pump and the electromagnetic valve form a closed circulating air passage, and air only passes through the purification tube 101 and is in a circulating working state, and the purification tube 102 is isolated from the air passage and is in a standby state.
The purifying pipe 101 is regenerated, and the purifying pipes 102 are connected in series to work; the exhaust valve behind the purifying pipe 101 is opened and the air inlet valve in front of the purifying pipe 102 is switched to switch the valve direction, the air channel is directly communicated with the atmosphere, air is pumped into the air channel through the air inlet valve, and the air is formed into a unidirectional serial air channel through the purifying pipe 102, the air pump, the ion mobility spectrometry main body and the purifying pipe 101, and regenerated moisture is directly discharged through the exhaust valve.
The purifying pipe 101 is used, and the purifying pipe 102 circularly works; after the purification tube 101 is regenerated, the air inlet valve and the air outlet valve are closed, and the direction of the air passage switching valve is switched at the same time, so that the purification tube 102, the ion mobility spectrometry main body, the air pump and the electromagnetic valve form a closed circulation air passage, air only passes through the purification tube 102 and is in a circulation working state, and the purification tube 101 is isolated from the air passage and is in a standby state.
The beneficial effects are that: the system can be stably used for a long time, has high regeneration efficiency, and the four working states of the purifying pipes are continuously and circularly switched, so that the circulating regeneration system provided by the invention realizes the circulating use and regeneration of the two purifying pipes, does not need to manually replace a drying agent on the premise of ensuring the online continuous use of ion mobility spectrometry equipment, automatically realizes the efficient regeneration of the purifying pipes, and greatly prolongs the service life of the drying agent.
The circulating regeneration system provided by the invention automatically realizes the circulating use and high-efficiency regeneration of two purifying pipes by switching the states of the purifying pipes without manually replacing the drying agent on the premise of ensuring the online continuous stable use of the ion mobility spectrometry equipment, and improves the convenience of daily use of the ion mobility spectrometry equipment.
When the purifying pipe is regenerated, the ion mobility spectrometry equipment adopts a unidirectional gas circuit, the fresh air purified by the first purifying pipe is used for purging the second purifying pipe which is heated and regenerated, water vapor is directly discharged into the atmosphere through the exhaust valve, so that the discharge of the moisture of the purifying agent is greatly accelerated, and the regenerating process of the purifying pipe is shortened; when the purifying pipe is not regenerated, the ion mobility spectrometry equipment adopts a circulating gas circuit, drift gas only passes through 1 purifying pipe, and 1 purifying pipe is in a standby state, so that direct contact between the purifying pipe and the atmosphere is avoided, the service cycle of the purifying agent is prolonged, the regeneration frequency is reduced, and the service life of the purifying pipe is prolonged.
Drawings
The invention is described in detail below with reference to the drawings and the detailed description;
fig. 1 is a control flow diagram of the present invention.
Fig. 2 is a flow chart of the control of the gas circuit of the circulating regeneration system of the purifying pipe in embodiment 1 of the invention.
Fig. 3 is a flow chart of the control of the air path of the circulating regeneration system of the purifying pipe in embodiment 2 of the invention.
Fig. 4 is a flow chart of the control of the air path of the circulating regeneration system of the purifying pipe in embodiment 3 of the invention.
Detailed Description
The invention is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the invention easy to understand.
Referring to fig. 1, an ion mobility spectrometry purification tube cyclic regeneration system includes a purification tube regeneration module 100, a gas circuit conversion module 200, a sensor module 300, and a control module 400. The working process of the system is as follows: the sensor module 300 monitors the humidity of the drift gas in real time through a humidity sensor arranged in the gas circuit, feeds humidity parameter information back to the control module 400, the control module 400 is a command officer of the whole system, receives the gas circuit state parameter and issues a control command, and when the humidity parameter reaches a set threshold, the control module 400 simultaneously sends the control command to the gas circuit conversion module 200 and the purifying tube regeneration module 100 to perform gas circuit switching and regeneration heating. The gas circuit conversion module 200 is connected with the purifying pipe and the ion migration equipment main body and is used for switching the direction of the gas circuit to influence the working state of the purifying pipe; the purge tube regeneration module 100 controls the heated regeneration of the purge tube while the regeneration temperature is monitored by the sensor module 200 and controlled by the control module 400.
Fig. 2-4 are gas circuit control flow diagrams for three embodiments of an ion mobility spectrometry purification tube recycling system. The main equipment in the gas circuit comprises:
a purifying pipe 101 and a purifying pipe 102, wherein in the embodiment, a molecular sieve filler for dust filtration and wet filtration is filled in the purifying pipe; the outer wall of the purifying pipe is wrapped with a silicon rubber heating sheet which is used for heating and regenerating the purifying agent, a temperature sensor is embedded in the heating sheet, and the temperature of the purifying pipe is monitored; the outermost side of the purifying tube is provided with a layer of aerogel heat insulation felt; the two purge tubes are configured to purge gas as it passes therethrough; the temperature of the molecular sieve regeneration is stabilized at 200 ℃ in the regeneration process, and the molecular sieve is heated for 6 hours, so that water in the molecular sieve forms water vapor after being heated and is discharged out of the purifying pipe.
The ion mobility spectrometry main body 5, the gas in the regeneration system is the drift gas of the ion mobility spectrometry; and an air pump 6 for driving the flow of drift gas in the system.
And (3) an exhaust valve: normally closed single-pass solenoid valves 201, 202, two-position three-way solenoid valves 203, 204;
intake valve: normally closed single-pass solenoid valves 205, 206, two-position three-way solenoid valves 203, 204, 212;
switching valve: two-position three-way solenoid valves 212, 207, 208, 209, 210, two-position four-way solenoid valve 211.
The exhaust valve, the air inlet valve and the conversion valve are combined together to form an air path conversion module of the purifying pipe circulating regeneration system, and the purifying pipe is switched into different working states through coordination work among the exhaust valve, the air inlet valve and the conversion valve:
(1) The purifying pipes 101 are in series connection for operation, and the purifying pipes 102 are regenerated; (2) the purifying pipe 101 circularly works, and the purifying pipe 102 is used; (3) regenerating the purifying pipe 101, and operating the purifying pipe 102 in series; (4) the purifying pipe 101 is used, and the purifying pipe 102 is circularly operated.
The state transition process of the gas path will be described in detail by different embodiments.
Example 1:
as shown in the gas circuit control flow chart of the purifying tube circulating regeneration system in fig. 2, the gas circuit control flow chart provided by the invention comprises a purifying tube 101, a purifying tube 102, an ion mobility spectrometry main body 5 and an air pump 6; the intake valve includes a two-position three-way solenoid valve 212; the exhaust valve comprises normally closed single-pass electromagnetic valves 203 and 204; the switching valve comprises two-position three-way electromagnetic valves 212, 207, 208, 209 and 210; according to the actual state of the molecular sieve in the purifying tube fed back by the sensor module, the control module gives an instruction, and the purifying tube can show different working states through the coordination between the valves:
the purifying pipes 101 are in series connection for operation, and the purifying pipes 102 are regenerated;
the flow direction of the gas is as follows: atmospheric air, valve 212, air pump 6, valve 209, purge tube 101, valve 208, ion mobility spectrometry apparatus 5, valve 207, valve 210, purge tube 102, valve 202, atmospheric air. Wherein valve 212 is directly in communication with the atmosphere, valve 209 is switched to be in communication with purge tube 101, valve 208 is in communication with ion mobility spectrometry apparatus 5, valve 207 is in communication with valve 210, valve 210 is in communication with purge tube 102, and valve 202 is opened while maintaining the normally closed state of valve 201.
In the process, the purifying pipe 102 is in a heating regeneration state, moisture, VOCs and the like in the molecular sieve are volatilized gradually, the air pump extracts fresh air from the atmosphere, the fresh air enters 5 to become dry drift gas after being purified by the purifying pipe 101, the ion mobility spectrometry equipment still keeps a normal working state, the drift gas flows out from the other end of 5 and directly enters the purifying pipe 102, and regenerated moisture is discharged into the atmosphere to form a unidirectional serial gas circuit. The state ensures that the purifying pipe can purify gas and efficiently regenerate the molecular sieve and simultaneously ensure the normal operation of the ion mobility spectrometry equipment.
The purifying pipe 101 circularly works, and the purifying pipe 102 is used for later use;
after the regeneration of the purifying tube 102 is completed, the purifying tube 101 is switched to an internal circulation gas path in order to prolong the service period of the purifying tube 101. The flow of gas at this time is one cycle: valve 212, air pump 6, valve 209, purge tube 101, valve 208, ion mobility spectrometry apparatus 5, valve 207, valve 212. Wherein valve 212 communicates with valve 207, valves 209, 208 switch to communicate with purge tube 101, and valves 201, 202 remain normally closed.
In the process, the purifying tube 101, the ion mobility spectrometry main body 5 and the air pump 6 form a closed circulating air passage, drift air only passes through the purifying tube 101, and the purifying tube 102 is isolated from the air passage and is in a standby state. In the whole operation period of the ion mobility spectrometry equipment, the proportion of the regeneration process is small, the use of the internal circulation drift gas prolongs the service period of the purifying tube 101, reduces the regeneration times of the purifying tube, and also prolongs the service life of the molecular sieve.
The purifying pipe 101 is regenerated, and the purifying pipes 102 are connected in series to work;
after the purification tube 101 works for a long time, the molecular sieve in the purification tube gradually fails, the sensor module detects the rise of the humidity of drift gas, and the numerical feedback control module sends a gas circuit switching instruction to enable the purification tube 101 to be in a regeneration state after the humidity reaches a threshold value, and meanwhile, the purification tube 102 in a standby state is connected into a gas circuit. The flow direction of the gas at this time is as follows: atmospheric air, valve 212, air pump 6, valve 209, purge tube 102, valve 208, ion mobility spectrometry apparatus 5, valve 207, valve 210, purge tube 101, valve 201, atmospheric air. Wherein valve 212 is directly in communication with the atmosphere, valves 209, 208 are switched to communicate with purge tube 102, valve 207 is in communication with valve 210, valve 210 is in communication with purge tube 101, and valve 201 is opened while maintaining the normally closed state of valve 202.
In the process, the purifying pipe 101 is in a heating regeneration state, the air pump pumps fresh air, the fresh air enters the purifying pipe 102 to be dried drifting air in the purifying pipe 5, the ion mobility spectrometry equipment keeps a normal working state, the drifting air flows out from the other end of the purifying pipe 5 and directly enters the purifying pipe 101, and regenerated moisture is discharged into the atmosphere to form a unidirectional serial gas circuit.
The purifying pipe 102 circularly works, and the purifying pipe 101 is used for later use;
after the regeneration of the purifying tube 101 is completed, the purifying tube 102 is switched to an internal circulation gas circuit. The flow of gas at this time is one cycle: valve 212, air pump 6, valve 209, purge tube 102, valve 208, ion mobility spectrometry apparatus 5, valve 207, valve 212. Wherein valve 212 communicates with valve 207, valves 209, 208 switch to communicate with purge tube 102, and valves 201, 202 remain normally closed.
In the process, the purifying tube 102, the ion mobility spectrometry main body 5 and the air pump 6 form a closed circulating air passage, drift air only passes through the purifying tube 102, and the purifying tube 101 is isolated from the air passage and is in a standby state.
Example 2:
fig. 3 is another embodiment of the present invention. The gas circuit control flow chart comprises a purifying pipe 101, a purifying pipe 102, an ion mobility spectrometry main body 5 and a gas pump 6; the two-position three-way solenoid valves 203, 204 are both intake valves and exhaust valves; the switching valve comprises a two-position four-way valve 211 and a two-position three-way valve 209, and the purifying pipe is switched into different working states through the coordination work of the modules:
the purifying pipes 101 are in series connection for operation, and the purifying pipes 102 are regenerated;
the flow direction of the gas is as follows: atmospheric air, valve 203, purge tube 101, valve 211, air pump 6, ion mobility spectrometry apparatus 5, purge tube 102, valve 204, atmospheric air. Wherein the valves 203, 204 are switched to be in communication with the atmosphere, and the valve 211 is switched to directly connect the purge tube 101 to the air pump 6, and the purge tube 102 to the drift gas outlet of the ion mobility spectrometry apparatus 5.
In the process, the purifying pipe 102 is in a heating regeneration state, the air pump extracts fresh air from the air inlet valve 203, the fresh air enters the purifying pipe 101 to be dried drift gas in the step 5 after being purified, the ion mobility spectrometry equipment still keeps a normal working state, the drift gas flows out from the other end of the step 5 and directly enters the purifying pipe 102, and regenerated moisture is discharged into the atmosphere through the valve 204 to form a unidirectional serial air path.
The purifying pipe 101 circularly works, and the purifying pipe 102 is used for later use;
after the regeneration of the purifying tube 102 is completed, the purifying tube 101 is switched into an internal circulation gas circuit: valve 203, purge tube 101, valve 211, air pump 6, ion mobility spectrometry apparatus 5, valve 209, valve 203. I.e. the states of the valves 203 and 204 are simultaneously switched, the valve 209 and the valve 203 form a passage, and the three-way valve 211, the purifying pipe 102 and the valve 204 of the outlet of the ion mobility spectrometry device 5 are in a dead-end state.
In the process, the purifying tube 101, the air pump 6 and the ion mobility spectrometry main body 5 form a closed circulation air path, drift air only passes through the purifying tube 101, and the purifying tube 102 does not participate in the circulation of the air path.
The purifying pipe 101 is regenerated, and the purifying pipes 102 are connected in series to work;
the flow direction of the gas at this time is as follows: atmospheric air, valve 204, purge tube 102, valve 211, air pump 6, ion mobility spectrometry apparatus 5, purge tube 101, valve 203, atmospheric air. Wherein the valves 203, 204 are switched to be in communication with the atmosphere, and the valve 211 is switched to directly connect the purge tube 102 to the air pump 6, and the purge tube 101 to the drift gas outlet of the ion mobility spectrometry apparatus 5.
In the process, the purifying pipe 101 is in a heating regeneration state, the air pump extracts fresh air from the air inlet valve 204, the fresh air enters the purifying pipe 102 to be dried drift gas in the purifying pipe 5, the ion mobility spectrometry equipment still keeps a normal working state, the drift gas flows out from the other end of the ion mobility spectrometry equipment 5 and directly enters the purifying pipe 101, and regenerated moisture is discharged into the atmosphere through the valve 202 to form a unidirectional serial air path.
The purifying pipe 101 is used, and the purifying pipe 102 circularly works;
after the regeneration of the purifying tube 101 is completed, the purifying tube 102 is switched into an internal circulation gas circuit: valve 204, purge tube 102, valve 211, air pump 6, ion mobility spectrometry apparatus 5, valve 209, valve 204. I.e. the states of the valves 203 and 204 are simultaneously switched, the valve 209 and the valve 204 form a passage, and the three-way valve 211, the purifying pipe 101 and the valve 203 of the outlet of the ion mobility spectrometry device 5 are in a dead-end state.
In the process, the purifying tube 102, the air pump 6 and the ion mobility spectrometry main body 5 form a closed circulation air path, drift air only passes through the purifying tube 102, and the purifying tube 101 does not participate in the circulation of the air path.
Example 3:
fig. 4 is yet another embodiment of the present invention. The gas circuit control flow chart comprises a purifying pipe 101, a purifying pipe 102, an ion mobility spectrometry main body 5 and a gas pump 6; normally closed single-pass intake valves 205, 206; normally closed single-pass exhaust valves 201, 202; two-position three-way switching valves 209, 208. Through the coordinated operation of these valves, the purge tube is switched to different operating states:
the purifying pipes 101 are in series connection for operation, and the purifying pipes 102 are regenerated;
the flow direction of the gas is as follows: atmospheric air, valve 206, purge tube 101, valve 209, air pump 6, ion mobility spectrometry apparatus 5, valve 208, purge tube 102, valve 202, atmospheric air. Wherein valves 206, 202 are switched to open, valves 205, 201 remain normally closed, valve 209 is switched to communicate with purge tube 101, and valve 208 is switched to communicate with purge tube 102.
In this process, the purifying tube 102 is in a heating regeneration state, the air pump extracts fresh air from the air inlet valve 206, after purifying by the purifying tube 101, the fresh air enters the purifying tube 5 to become dry drift gas, the ion mobility spectrometry equipment still keeps a normal working state, the drift gas flows out from the other end of the purifying tube 5, directly enters the purifying tube 102, and the regenerated moisture is discharged into the atmosphere through the valve 202 to form a unidirectional serial air path.
The purifying pipe 101 circularly works, and the purifying pipe 102 is used for later use;
after the regeneration of the purifying tube 102 is completed, the purifying tube 101 is switched into an internal circulation gas circuit: valve 208, purge tube 101, valve 209, air pump 6, ion mobility spectrometry apparatus 5, valve 208. That is, the normally closed state of the valves 201, 202, 205, 206 is maintained, the valve 209 is maintained in communication with the purge pipe 101, and the valve 208 is switched to be in communication with the purge pipe 101.
In the process, the purifying tube 101, the air pump 6 and the ion mobility spectrometry main body 5 form a closed circulation air path, drift air only passes through the purifying tube 101, and the purifying tube 102 does not participate in the circulation of the air path.
The purifying pipe 101 is regenerated, and the purifying pipes 102 are connected in series to work;
the flow direction of the gas is as follows: atmospheric air, valve 205, purge tube 102, valve 209, air pump 6, ion mobility spectrometry apparatus 5, valve 208, purge tube 101, valve 201, atmospheric air. Wherein valves 205, 201 are switched to open, valves 206, 202 remain normally closed, valve 208 remains in communication with purge tube 101, and valve 209 is switched to communicate with purge tube 102.
In the process, the purifying pipe 101 is in a heating regeneration state, the air pump extracts fresh air from the air inlet valve 205, the fresh air enters the purifying pipe 102 to be dried drift gas in the purifying pipe 5, the ion mobility spectrometry equipment still keeps a normal working state, the drift gas flows out from the other end of the ion mobility spectrometry equipment 5 and directly enters the purifying pipe 101, and regenerated moisture is discharged into the atmosphere through the valve 201 to form a unidirectional serial air path.
The purifying pipe 101 is used, and the purifying pipe 102 circularly works;
after the regeneration of the purifying tube 101 is completed, the purifying tube 102 is switched into an internal circulation gas circuit: valve 208, purge tube 102, valve 209, air pump 6, ion mobility spectrometry apparatus 5, valve 208. I.e., maintaining the normally closed state of valves 201, 202, 205, 206, valve 209 remains in communication with purge tube 102 and valve 208 switches to communication with purge tube 102.
In the process, the purifying tube 102, the air pump 6 and the ion mobility spectrometry main body 5 form a closed circulation air path, drift air only passes through the purifying tube 102, and the purifying tube 101 does not participate in the circulation of the air path.
In each embodiment of the invention, four working states of the purifying pipes are continuously and circularly switched, so that the circulating regeneration system of the invention realizes the circulating use and regeneration of two purifying pipes, and the invention does not need to manually replace the drying agent on the premise of ensuring the online continuous use of the ion mobility spectrometry equipment, thereby automatically realizing the efficient regeneration of the purifying pipes and greatly prolonging the service life of the drying agent.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the patent claims is defined by the appended claims and their equivalents.
Claims (6)
1. The working method of the ion mobility spectrometry purifying tube circulating regeneration system is characterized in that the ion mobility spectrometry purifying tube circulating regeneration system comprises the following steps: the device comprises a gas circuit conversion module, a purifying tube regeneration module, a sensor module and a control module;
the purifying tube regeneration module comprises two purifying tubes I and two purifying tubes II which are parallel; the purifying pipe is connected with the equipment main body through an electromagnetic control valve, and the front end and the rear end of the purifying pipe are respectively provided with an air inlet valve and an air outlet valve which can be directly communicated with the atmosphere;
the gas path conversion module comprises an air inlet valve, an air outlet valve and a conversion valve; the purifying tubular state can be switched into working, regenerating and standby by changing the working state of the electromagnetic valve in the gas circuit;
the sensor module comprises a humidity sensor arranged in the air path;
the control module is connected with all other modules in a control way, receives the air passage state parameters, controls the air passage conversion module and the purifying tube regeneration module according to the collected air passage state parameters, issues control instructions, switches the working state of the purifying tube, monitors the humidity of drifting air in real time through a humidity sensor arranged in the air passage, feeds back humidity parameter information to the control module, receives the air passage state parameters, issues control instructions, and simultaneously sends the control instructions to the air passage conversion module and the purifying tube regeneration module when the humidity parameter reaches a set threshold value, and switches the purifying tube into different working states:
(1) The first purifying pipe is connected in series, the second purifying pipe is regenerated, the first purifying pipe is connected in series, and the specific regeneration process of the second purifying pipe is as follows: an exhaust valve of the second purifying pipe and an air inlet valve of the first purifying pipe are opened, the direction of the switching valve is switched, the air channel is directly communicated with the atmosphere, air is pumped into the air channel through the air inlet valve, and a unidirectional serial air channel is formed through the first purifying pipe, the air pump, the ion mobility spectrometry main body and the second purifying pipe, and regenerated moisture is directly discharged through the exhaust valve;
(2) The first purifying pipe works circularly, the second purifying pipe works circularly, and the second purifying pipe works circularly in the following concrete process: after the second purifying pipe is regenerated, closing the air inlet valve and the air outlet valve, and simultaneously switching the direction of the switching valve, so that the first purifying pipe, the main body of the ion mobility spectrometry equipment, the air pump and the electromagnetic valve form a closed circulating air passage, the air passes through the first purifying pipe only and is in a circulating working state, and the second purifying pipe is isolated from the air passage and is in a standby state;
(3) The first purifying pipe is regenerated, the second purifying pipe is connected in series, the first purifying pipe is regenerated, and the second purifying pipe is connected in series, wherein the specific process is as follows: an exhaust valve behind the first purifying pipe and an air inlet valve in front of the second purifying pipe are opened, the direction of the switching valve is switched, the air channel is directly communicated with the atmosphere, air is pumped into the air channel through the air inlet valve, and the air is formed into a unidirectional serial air channel through the second purifying pipe, the air pump, the ion mobility spectrometry main body and the first purifying pipe, and regenerated moisture is directly discharged through the exhaust valve;
(4) The first purifying pipe is used, the second purifying pipe works circularly, the first purifying pipe is used, and the second purifying pipe works circularly in the following specific process: after the purifying tube is regenerated, closing the air inlet valve and the air outlet valve, and simultaneously switching the direction of the air passage switching valve, so that a closed circulating air passage is formed by the purifying tube II, the ion mobility spectrometry main body, the air pump and the electromagnetic valve, the air passes through the purifying tube II only and is in a circulating working state, and the purifying tube I is isolated from the air passage and is in a standby state;
on the premise of online continuous use of the ion mobility spectrometry equipment, four working states of the purifying pipe are continuously and circularly switched.
2. The method for operating an ion mobility spectrometry purification tube recycling system according to claim 1, wherein the purification tube is internally filled with a dust-filtering wet-filtering purifying agent filler; the outer wall of the purifying tube is provided with a silicon rubber heating sheet.
3. The method of claim 2, wherein the outside of the silicon rubber heating plate is a layer of heat-insulating material.
4. The method of claim 3, wherein the thermal insulation material is one of aerogel thermal insulation felt, glass wool, aluminum silicate fiber, and vacuum insulation panel.
5. The method of claim 2, wherein the silicon rubber heating plate is embedded with a temperature sensor, and the temperature sensor is connected with the control module.
6. The method of claim 2, wherein the scavenger filler is one of an active mineral scavenger, a silica gel, and a molecular sieve.
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