CN110455697A - Single layer diaphragm mass-transfer performance refines measuring device - Google Patents
Single layer diaphragm mass-transfer performance refines measuring device Download PDFInfo
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- CN110455697A CN110455697A CN201910777229.9A CN201910777229A CN110455697A CN 110455697 A CN110455697 A CN 110455697A CN 201910777229 A CN201910777229 A CN 201910777229A CN 110455697 A CN110455697 A CN 110455697A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/086—Investigating permeability, pore-volume, or surface area of porous materials of films, membranes or pellicules
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Abstract
The invention discloses a kind of single layer diaphragm mass-transfer performances to refine measuring device, heat-mass exchange equipment including low-humidity air processing module, highly humid air processing module and membrane mass transfer, the heat-mass exchange equipment of the membrane mass transfer includes single layer diaphragm, low-humidity air side and highly humid air side, the low-humidity air processing module includes along the sequentially connected cold wind blower of low temperature and low humidity air-flow approach axis, surface air cooler, low-humidity air surge tank, check-valves, circulating fan, and the low-humidity air side connection of the heat-mass exchange equipment of the membrane mass transfer is arranged between check-valves and circulating fan.Apparatus of the present invention increase the mass transfer amount between two strands of air using time integral, can be realized to the single layer diaphragm mass transfer ability high-precision of diverse microcosmic structure type, quickly measurement.
Description
Technical field
The invention belongs to heating ventilation air-conditioning system fields, are related to a kind of performance testing device of film damping.
Background technique
Air humidity is an important parameter of air conditioning, and currently used air dehumidification method has dehumidification by condensation, consolidates
Body adsorption and dehumidification, solution absorption dehumidifying, pressurization cooling and dehumidifying, film dehumidifying etc..Compared to other dehumanization methods, film dehumidifying, which has, to be removed
The advantages that wet process is continuous, pollution-free problem, dehumidification efficiency are high, equipment is simply easy to maintain, there is very wide application prospect.
Film dehumidifying is the novel dehumidifying technology for developing recently as membrane separation technique and generating, and critical component is selection
Property penetrate film, vapor can cannot pass through by film oxygen, nitrogen etc., thus isolate vapor from air
Come, achievees the purpose that dehumidifying.Make vapor through film, it is necessary to have water vapor partial pressure differential in film two sides, and to guarantee to make
It cannot be gathered in the per-meate side of film in order to avoid reducing the wet-out property of film with hydrone in the process.
In conclusion based Dehumidification Membranes are the principal elements for determining film effect on moisture extraction, the research of membrane material is film dehumidifying technology
Important research content, ideal based Dehumidification Membranes answer good separative efficiency height, mechanical strength, long service life, reasonable price and are easy to raw
It produces.Present based Dehumidification Membranes there are rate of perviousness low, intensity difference, it is at high cost the disadvantages of.Therefore the research of membrane material is film dehumidifying technology
Important research content.In research, the technological means of science and facility is needed to be tested for the property the film of different materials.By
Very short in the time that air draught flows through single layer diaphragm, the wet difference of air ports is smaller, therefore, the more difficult standard of general measuring method
The really mass-transfer performance of measurement single layer diaphragm.
From the point of view of background above technology, a certain amount of air is iterated through into diaphragm to be measured there has been no a kind of at present, and pass through
Increase total mass transfer amount to improve the single layer diaphragm mass-transfer performance of measuring accuracy fining measuring device.
Summary of the invention
Technical problem: the present invention provides one kind, and aerial temperature and humidity can be adjusted, and high-acruracy survey air is containing wet
The single layer diaphragm mass-transfer performance for measuring situation of change refines measuring device.
Technical solution: single layer diaphragm mass-transfer performance fining measuring device of the invention, including low-humidity air processing module,
The heat-mass exchange equipment of highly humid air processing module and membrane mass transfer, the heat-mass exchange equipment of the membrane mass transfer include single layer diaphragm,
Low-humidity air side and highly humid air side, the low-humidity air processing module include being sequentially connected along low temperature and low humidity air-flow approach axis
Cold wind blower, surface air cooler, low-humidity air surge tank, check-valves, circulating fan, the heat-mass exchange equipment of the membrane mass transfer it is low
The connection of humid air side is arranged between check-valves and circulating fan, and the outlet of check-valves also passes through the outlet of pipeline and circulating fan
It connects, is provided with on-line sampling device on the pipeline between the low-humidity air side and circulating fan import of heat-mass exchange equipment；
The highly humid air processing module includes along the sequentially connected heater of high temperature and humidity air-flow approach axis, humidification
The highly humid air side connection of device, highly humid air surge tank and air-heater, the heat-mass exchange equipment of the membrane mass transfer is arranged in height
Between humid air surge tank and air-heater.
Further, it in apparatus of the present invention, is provided on the pipeline between the non-return valve outlet and circulating fan outlet
Low-humidity air flowmeter, low-humidity air hygrometer, low-humidity air thermometer.
Further, in apparatus of the present invention, the highly humid air side-entrance of the heat-mass exchange equipment of the membrane mass transfer and high humidity
Highly humid air inlet humidification meter, highly humid air inlet temperature meter, membrane mass transfer are provided on pipeline between the outlet of air cushion tank
Heat-mass exchange equipment highly humid air side outlet and air-heater import between pipeline on be provided with highly humid air flowmeter,
Highly humid air outlet humidity meter, highly humid air outlet temperature meter.
Further, in apparatus of the present invention, the on-line sampling device is connected with the dew for measuring sampled air
Point instrument.
Further, in apparatus of the present invention, the inlet of the low-humidity air side of the heat-mass exchange equipment of the membrane mass transfer with
The exit of check-valves passes through low-humidity air piping connection, the outlet of the low-humidity air side of the heat-mass exchange equipment of the membrane mass transfer
Place and the inlet of on-line sampling device pass through low-humidity air piping connection；The high humidity of the heat-mass exchange equipment of the membrane mass transfer is empty
By highly humid air piping connection, the caloic of the membrane mass transfer is exchanged for the inlet of gas side and the exit of highly humid air surge tank
The exit of the highly humid air side of equipment and the inlet of air-heater pass through highly humid air piping connection.
Further, in apparatus of the present invention, it is low that the low temperature and low humidity air-flow becomes low temperature after surface air cooler condensation is dried
Wet air-flow, high temperature and humidity air-flow become the air-flow of high temperature and humidity, low temperature and low humidity after heater heating and humidifier humidification
The low-humidity air side and highly humid air side of diaphragm are logical in the heat-mass exchange equipment of membrane mass transfer respectively for air-flow and high temperature and humidity air-flow
It crosses diaphragm and carries out caloic exchange.
In the preferred embodiment of apparatus of the present invention, dehumidification by condensation is carried out to portion of air using surface air cooler, using heater
Warming and humidifying is carried out to another part air with humidifier, two parts air needs to be processed to reasonable temperature and humidity, while
When flowing through the two sides of film, a reasonable flow-rate ratio is needed, to improve the precision of test.High temperature and humidity air-flow is constantly passed through
It is disposable in system；Low temperature and low humidity air-flow is passed through a certain amount of rear stopping of system and is passed through, under the driving of circulating fan repeatedly
Circulation, repeatedly dehumidifies to high temperature and humidity air-flow in the heat-mass exchange equipment of membrane mass transfer.When on-line sampling device is to fix
Between interval sampling (5-10L/min), use high-precision (± 1 DEG C) dew point hygrometer measurement low temperature and low humidity air-flow water capacity variation feelings
Condition, above method are increased the mass transfer amount of low temperature and low humidity air-flow and high temperature and humidity air-flow using time integral, can be realized monofilm
The test of the mass-transfer performance degree of precision of piece.
Apparatus of the present invention include blower, surface air cooler, heater, humidifier, surge tank, using membrane mass transfer caloic exchange set
Standby and relevant valve member and measuring instrumentss.Device is divided into two parts air-flow in the process of running.A portion air-flow according to
It is secondary by heater, humidifier and surge tank, form flow and the uniform and stable high temperature and humidity air of pressure, continuously supply caloic
The side of film in switching equipment；Another part air-flow successively passes through surface air cooler and surge tank, forms flow and pressure is uniform and stable
Low temperature and low humidity air, the other side iterative cycles of film in heat-mass exchange equipment.By the mass transfer of film, low humidity air-flow continues quilt
High wet gas current humidification.Using on-line sampling device with fixed time-interval sampling, low humidity air-flow is measured using high-accuracy dew point meter
The situation of change of water capacity.Above method increases the mass transfer amount between two strands of air using time integral, can be realized to difference
The single layer diaphragm mass transfer ability high-precision of microstructure form, quickly measurement.
Single layer diaphragm mass-transfer performance of the invention refines measuring device, produces a certain amount of low temperature and low humidity air and follows repeatedly
Ring passes through the side of film to be measured, and the air for constantly producing high temperature and humidity continues through the other side of film to be measured, carries out film to it
Dehumidifying.With fixed time-interval sampling and the water capacity of circulation air is measured therebetween, time integral is utilized to increase circulation air
Hygroscopic capacity realizes the test of the mass-transfer performance degree of precision of single layer diaphragm.
The utility model has the advantages that compared with prior art, the present invention having the advantage that
Apparatus of the present invention and the main distinction of conventional measurement devices are, a certain amount of air to be measured is iterated through film
Side increases mass transfer total amount by increasing total mass transfer time, solve air draught flow through single layer diaphragm time it is short, empty
The small problem of the wet difference of gas inlet and outlet.
In addition, be provided with surface air cooler, heater and humidifier in device, can by air pretreatment to suitable state,
Surge tank can provide a good test condition with the flow and pressure of stable air.
Detailed description of the invention
Fig. 1 is that single layer diaphragm mass-transfer performance of the present invention refines measuring device systematic schematic diagram.
Have in figure: cold wind blower 1, surface air cooler 2, low-humidity air surge tank 3, check-valves 4, low-humidity air thermometer 5, low humidity
Psychrometer 6, low-humidity air flowmeter 7, circulating fan 8, on-line sampling device 9, dew point hygrometer 10, heater 11, humidifier
12, the caloic friendship of highly humid air surge tank 13, highly humid air inlet humidification meter 14, highly humid air inlet temperature meter 15, membrane mass transfer
Exchange device 16, highly humid air flowmeter 17, highly humid air outlet humidity meter 18, highly humid air outlet temperature meter 19, air-heater
20。
Specific embodiment
Below with reference to embodiment and Figure of description, the present invention is further illustrated.
Fig. 1 is the systematic schematic diagram that single layer diaphragm mass-transfer performance of the present invention refines measuring device, which includes low humidity
The heat-mass exchange equipment of air treatment module, highly humid air processing module and membrane mass transfer has two parts air to participate in the fortune of device
Row.Low-humidity air processing module in device includes cold along the sequentially connected cold wind blower 1 of low temperature and low humidity air-flow approach axis, table
Device 2, low-humidity air surge tank 3, check-valves 4 and along the sequentially connected on-line sampling device 9 in low temperature and low humidity airflow circulating direction, follow
Ring blower 8, low-humidity air flowmeter 7, low-humidity air hygrometer 6, low-humidity air thermometer 5 and for measuring on-line sampling device
The dew point hygrometer 10 of sampled air in 9.The highly humid air processing module includes being sequentially connected along high temperature and humidity air-flow approach axis
Heater 11, humidifier 12, highly humid air surge tank 13, highly humid air inlet humidification meter 14, highly humid air inlet temperature meter
15, highly humid air flowmeter 17, highly humid air outlet humidity meter 18, highly humid air outlet temperature meter 19 and air-heater 20.Institute
The heat-mass exchange equipment 16 for stating membrane mass transfer includes single layer diaphragm, low-humidity air side and highly humid air side, wherein high temperature and humidity air-flow
Highly humid air side is flowed through, low temperature and low humidity air-flow flows through low-humidity air side.
In a kind of embodiment of the invention, the heat-mass exchange equipment 16 of the membrane mass transfer includes single layer diaphragm, low-humidity air
Side and highly humid air side；The low-humidity air processing module includes along the sequentially connected cold wind wind of low temperature and low humidity air-flow approach axis
Machine 1, surface air cooler 2, low-humidity air surge tank 3, check-valves 4, circulating fan 8, the heat-mass exchange equipment 16 of the membrane mass transfer it is low
The connection of humid air side is arranged between check-valves 4 and circulating fan 8, and the outlet of check-valves 4 also passes through pipeline and circulating fan 8
Outlet connects, and is provided with on-line sampling on the pipeline between 8 import of low-humidity air side and circulating fan of heat-mass exchange equipment 16
Device 9, the on-line sampling device 9 are connected with the dew point hygrometer 10 for measuring sampled air；The highly humid air processing
Module includes along the sequentially connected heater 11 of high temperature and humidity air-flow approach axis, humidifier 12,13 and of highly humid air surge tank
The highly humid air side connection of air-heater 20, the heat-mass exchange equipment 16 of the membrane mass transfer is arranged in 13 He of highly humid air surge tank
Between air-heater 20.
In a kind of embodiment of the invention, it is provided on the pipeline between the outlet of check-valves 4 and the outlet of circulating fan 8
Low-humidity air flowmeter 7, low-humidity air hygrometer 6, low-humidity air thermometer 5；The heat-mass exchange equipment 16 of the membrane mass transfer
Highly humid air inlet humidification meter 14, height are provided on pipeline between highly humid air side-entrance and the outlet of highly humid air surge tank 13
Wet air inlet thermometer 15；The highly humid air side outlet of the heat-mass exchange equipment 16 of the membrane mass transfer and 20 import of air-heater
Between pipeline on be provided with highly humid air flowmeter 17, highly humid air outlet humidity meter 18, highly humid air outlet temperature meter 19.
In a kind of embodiment of the invention, the inlet of the low-humidity air side of the heat-mass exchange equipment 16 of the membrane mass transfer with
The exit of check-valves 4 passes through low-humidity air piping connection, the low-humidity air side of the heat-mass exchange equipment 16 of the membrane mass transfer
Exit and the inlet of on-line sampling device 9 pass through low-humidity air piping connection；The heat-mass exchange equipment 16 of the membrane mass transfer
Highly humid air side inlet and highly humid air surge tank 13 exit by highly humid air piping connection, the membrane mass transfer
Heat-mass exchange equipment 16 highly humid air side exit and air-heater 20 inlet pass through highly humid air piping connection.
When apparatus of the present invention work, a part of air-flow passes sequentially through heater 11, humidifier 12 and highly humid air surge tank
The air-flow for becoming high temperature and humidity, voltage stabilization and current stabilization amount after 13, passes through the highly humid air side of the heat-mass exchange equipment 16 of membrane mass transfer later
Caloic exchange is participated in, is finally seen off by air-heater 20, this process is continuous.Another part air-flow passes through cold wind blower 1
Promotion after, pass sequentially through surface air cooler 2, low-humidity air surge tank 3, become the air-flow of low temperature and low humidity, pressure stabilizing, flow through non-return later
Valve 4 participates in caloic exchange by the low-humidity air side of the heat-mass exchange equipment 16 of membrane mass transfer.When the low temperature and low humidity air-flow being passed through reaches
To after a certain amount of, check-valves 4 is closed, successively passes through the heat-mass exchange equipment of membrane mass transfer repeatedly with the low temperature and low humidity air of a part
16 low-humidity air side, on-line sampling device 9, circulating fan 8.On-line sampling device 9 is with Fixed Time Interval to low temperature and low humidity
Air-flow is sampled, and then carries out the measurement of water capacity to sampled air by dew point hygrometer 10, show that containing for low temperature and low humidity air-flow is wet
Situation of change is measured, and then measures the mass-transfer performance of diaphragm.
Above-described embodiment is only the preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill of the art
For personnel, without departing from the principle of the present invention, several improvement and equivalent replacement can also be made, these are to the present invention
Claim improve with the technical solution after equivalent replacement, each fall within protection scope of the present invention.
Claims (6)
1. a kind of single layer diaphragm mass-transfer performance refines measuring device, which is characterized in that the device includes low-humidity air processing mould
The heat-mass exchange equipment (16) of block, highly humid air processing module and membrane mass transfer, heat-mass exchange equipment (16) packet of the membrane mass transfer
Single layer diaphragm, low-humidity air side and highly humid air side are included, the low-humidity air processing module includes entering along low temperature and low humidity air-flow
The sequentially connected cold wind blower (1) in direction, surface air cooler (2), low-humidity air surge tank (3), check-valves (4), circulating fan (8),
The low-humidity air side connection of the heat-mass exchange equipment (16) of the membrane mass transfer is arranged between check-valves (4) and circulating fan (8),
The outlet of check-valves (4) also passes through pipeline and connect with the outlet of circulating fan (8), the low-humidity air side of heat-mass exchange equipment (16)
On-line sampling device (9) are provided on pipeline between circulating fan (8) import；
The highly humid air processing module includes along the sequentially connected heater of high temperature and humidity air-flow approach axis (11), humidifier
(12), highly humid air surge tank (13) and air-heater (20), the highly humid air of the heat-mass exchange equipment (16) of the membrane mass transfer
Side connection is arranged between highly humid air surge tank (13) and air-heater (20).
2. single layer diaphragm mass-transfer performance according to claim 1 refines measuring device, which is characterized in that the check-valves
(4) low-humidity air flowmeter (7), low-humidity air hygrometer are provided on the pipeline between outlet and circulating fan (8) outlet
(6), low-humidity air thermometer (5).
3. single layer diaphragm mass-transfer performance according to claim 1 refines measuring device, which is characterized in that the membrane mass transfer
Heat-mass exchange equipment (16) highly humid air side-entrance and highly humid air surge tank (13) outlet between pipeline on be provided with
Highly humid air inlet humidification meter (14), highly humid air inlet temperature meter (15), the high humidity of the heat-mass exchange equipment (16) of membrane mass transfer
Highly humid air flowmeter (17), highly humid air outlet are provided on pipeline between air side outlet and air-heater (20) import
Hygrometer (18), highly humid air outlet temperature meter (19).
4. single layer diaphragm mass-transfer performance according to claim 1,2 or 3 refines measuring device, which is characterized in that described
On-line sampling device (9) is connected with the dew point hygrometer (10) for measuring sampled air.
5. single layer diaphragm mass-transfer performance according to claim 1,2 or 3 refines measuring device, which is characterized in that described
The inlet of the low-humidity air side of the heat-mass exchange equipment (16) of membrane mass transfer and the exit of check-valves (4) pass through low-humidity air pipe
Road connection, the exit of low-humidity air side of the heat-mass exchange equipment (16) of the membrane mass transfer and entering for on-line sampling device (9)
Pass through low-humidity air piping connection at mouthful；The inlet of the highly humid air side of the heat-mass exchange equipment (16) of the membrane mass transfer and height
The exit of humid air surge tank (13) passes through highly humid air piping connection, the height of the heat-mass exchange equipment (16) of the membrane mass transfer
The exit of humid air side and the inlet of air-heater (20) pass through highly humid air piping connection.
6. single layer diaphragm mass-transfer performance according to claim 1,2 or 3 refines measuring device, which is characterized in that described
Low temperature and low humidity air-flow becomes the air-flow of low temperature and low humidity after surface air cooler (2) condensation is dried, and high temperature and humidity air-flow passes through heater
(11) air-flow for heating up and becoming high temperature and humidity after humidifier (12) humidification, low temperature and low humidity air-flow and high temperature and humidity air-flow exist respectively
The low-humidity air side and highly humid air side of diaphragm carry out caloic exchange by diaphragm in the heat-mass exchange equipment (16) of membrane mass transfer.
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