CN100428977C - Structure of active carbon fibrous adsorptive bed with static charge reinforcing control - Google Patents

Structure of active carbon fibrous adsorptive bed with static charge reinforcing control Download PDF

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Publication number
CN100428977C
CN100428977C CNB2004100308413A CN200410030841A CN100428977C CN 100428977 C CN100428977 C CN 100428977C CN B2004100308413 A CNB2004100308413 A CN B2004100308413A CN 200410030841 A CN200410030841 A CN 200410030841A CN 100428977 C CN100428977 C CN 100428977C
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static
carbon fiber
adsorption
core body
active carbon
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CN1679997A (en
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徐靖中
梁世强
陈坚
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Qingdao Zhongke Ark Aviation Technology Co ltd
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Institute of Engineering Thermophysics of CAS
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Abstract

The present invention relates to a high-power density adsorption bed which reinforces control by inputting and releasing static charges, particularly to a high-efficiency adsorption bed used for solid adsorption cooling systems. A core body of the structure of activated carbon fiber adsorption bed with static charge reinforcing control has a static input terminal which can carry out controllable static charge discharge and charge on the core body of an adsorption bed. When the adsorption bed is in an adsorption state, the static input terminal is connected with the positive pole of a direct current power supply to charge positive charges to activated carbon fiber cloth in the bed, which leads that a static electricity force field and the adsorption potential of a micropore wall surface are superpositioned in order to reinforce the adsorption effect; when the adsorption bed is in a desorption state, the static input terminal is connected with the ground terminal of the direct current power supply to release positive charges to balance the unbalance of the force field, and the desorption temperature can be favorably reduced. The core body of the adsorption bed and a sealing head are separated by polytetrafluoroethylene or fluororubber static insulation material in order to realize static insulation.

Description

The carbon fiber adsorption and catalytic combustion bed that a kind of electrostatic charge control is strengthened
Technical field
The present invention relates to a kind of high power density adsorbent bed of strengthening by input and release electrostatic lotus realization control, be meant the efficient adsorbent bed that is used for the solid adsorption refrigeration system especially.
Background technology
Adsorbent bed in the solid adsorption refrigeration system is with periodically heating/type of cooling operation.The heat and mass speed of refrigerant vapour in the adsorbent micropore has determined the specific power output of refrigeration system.Conventional activated carbon granule adsorbent bed has influenced its practicality owing to heat transmission resistance causes a body power density low, bulky greatly.The micropore of NACF (ACF) is distributed in fiber surface, even aperture distribution, and the rate of adsorption is fast, and adsorption capacity is big, is a kind of good solid absorbent.For overcoming the low defective of bulk density, NACF is woven into cloth, push or wrap tightly formation adsorbent thin layer on heat transfer wall again.This laminate structure has reduced the adsorbent bed thermal resistance significantly, but because the clearance control of fibre bundle mass transfer rate, therefore, resistance to mass tranfer will rise to the principal element that influences the rate of adsorption.
Molecular simulation to NACF-methyl alcohol adsorption process shows, because methanol molecules has permanent dipole moment, itself has electric conductivity NACF, and electrostatic charge is added on the NACF surface can significantly increase adsorption capacity, quickens the speed that methanol molecules is assembled to the micropore wall; And after absorption reaches balance, dischargeing electrostatic charge again, unbalance the helping of poised state, obtain desorption effect preferably under low desorption temperature.
Summary of the invention
The object of the present invention is to provide a kind of adsorbent bed and operation method of implementing active carbon fiber fabrics interpolation and release electrostatic lotus, it can significantly improve the adsorption capacity and the rate of adsorption of active carbon fiber fabrics, reduce desorption temperature, thereby improve the adsorbent bed power density, reduce a body volume, reduce cost, improve the entire system performance.
For achieving the above object, technical solution of the present invention provides the carbon fiber adsorption and catalytic combustion bed that a kind of electrostatic charge control is strengthened, and its core body has the static input, can carry out the controlled electrostatic charge that charges and discharge to the adsorbent bed core body; When adsorbent bed was in adsorbed state, the static input linked to each other with dc power anode, and active carbon fiber fabrics charges into positive charge in bed, made the stack of the static field of force and micropore wall absorption potential, to strengthen adsorption effect; And when adsorbent bed is in detachment status, the static input is linked to each other with the direct-current power supply earthing end, and dischargeing positive charge, the balance field of force unbalance helps reducing desorption temperature.
Described carbon fiber adsorption and catalytic combustion bed between its adsorbent bed core body and housing and the end socket, is isolated to realize the static insulation by the fluorubber insulative material.
Described carbon fiber adsorption and catalytic combustion bed between its adsorbent bed core body and housing and the end socket, is isolated to realize the static insulation by polytetrafluoroethylene (PTFE).
Described carbon fiber adsorption and catalytic combustion bed, its described static input links to each other with earth terminal with dc power anode respectively by control circuit; The action of control circuit is synchronous with the vacuum barrier valve that is connected adsorbent bed and evaporimeter; Vapour pressure is lower than evaporator evaporation pressure in bed, and when the vacuum barrier valve was opened, the static input linked to each other with dc power anode by control circuit, adsorbs to strengthen to active carbon fiber fabrics input positive charge; Reach capacity when active carbon fiber fabrics adsorbs, when the vacuum barrier valve of connection adsorbent bed and evaporimeter cut out, the static input linked to each other with the earth terminal of dc source by control circuit, discharges positive charge, is beneficial to reduce desorption temperature.
Described carbon fiber adsorption and catalytic combustion bed, its core body is made up of core body end plate, metal U-shaped pipe, static input, aluminium fin; Core body end plate one side is provided with the static input, and lower surface has static insulated enclosure circle, links to each other with housing by static insulated enclosure circle; Metal U-shaped pipe upper end is affixed with the core body end plate; Metal U-shaped pipe two upper ends connect core body end plate, static insulation board and end socket base plate, communicate with two cavitys of end socket respectively; Aluminium fin level evenly distributes, and is fixed on the metal U-shaped pipe; The upper and lower surface of each aluminium fin is all adhered to active carbon fiber fabrics, constitutes an absorbing unit, separates with porous ceramics between the absorbing unit.
Described carbon fiber adsorption and catalytic combustion bed, its described aluminium fin and active carbon fiber fabrics and the assembling of porous ceramics entire pressurisation when improving the active carbon fiber fabrics bulk density, do not influence the refrigerant vapour passage; The thickness of active carbon fiber fabrics is at 1~3mm, and the average pore size of used porous ceramics is at 0.5~3mm, and thickness is at 3~5mm.
Described carbon fiber adsorption and catalytic combustion bed, its described metal U-shaped pipe is a plurality of; Average pore size 〉=the 2nm of active carbon fiber fabrics.
Implementing technical scheme conclusion of the present invention comprises: 1, and in the adsorbent bed structure that the present invention proposes, core body and housing are realized electrostatic isolation by insulative material; 2, the average pore size of selected NACF is answered 〉=2nm in the adsorbent bed; 3, active carbon fiber fabrics, porous ceramics and aluminium fin entire pressurisation are assembled, and both can improve the loading density of active carbon fiber fabrics, provide refrigerant vapour to enter the circulation passage of active carbon fiber fabrics again; 4, the adsorbent bed core body is provided with the static input end interface, and interface is connected with earth terminal with dc power anode respectively by 2 switches of static insulation; 5, the action of 2 switches of static insulation by control system according to temperature and pressure signal controlling in the adsorbent bed; 6, the adsorbent bed housing has condenser function (is that 01140436 patent of invention is identical with application number) concurrently.
Adopt technical scheme of the present invention can reach following purpose and effect:
1. absorption phase: active carbon fiber fabrics in the bed is added positive charge by the static input, because electrostatic force is a kind of long range force, the static field of force has enlarged the sphere of action of wall absorption potential, quickened the migration of methanol molecules, thereby reached the purpose that significantly improves the adsorption capacity and the rate of adsorption to adsorption potential;
2. desorption stage: after reaching adsorption equilibrium, by the static input is connected with earth terminal, discharge the core body positive charge, the result that poised state is unbalance has strengthened the tendency of methanol molecules disengaging micropore wall, simultaneously, since micropore size big (〉=2nm) wall absorption potential relatively a little less than, cause being issued to desorption effect preferably at lower desorption temperature;
3. for a kind of solid absorbent, wall absorption potential is uncontrollable.Average pore size is more little, and absorption potential is just stronger, and adsorbance is bigger, but desorption temperature is also high; Otherwise average pore size is big more, absorption potential a little less than, desorption temperature is just on the low side, but adsorbance is also little.And the input of electrostatic force and release are controlled, by artificial input and release electrostatic lotus, can reduce desorption temperature when improving adsorbance, thereby increase substantially sorption cycle efficient, reach the purpose of efficiently utilizing the low grade residual heat resource;
4. the adsorbent bed housing has condenser function concurrently, and this point and application number are that 01140436 patent of invention is described identical, thereby it is powerful to have kept the described institute of this patent.
Description of drawings
Fig. 1 is the electric insulation schematic diagram of adsorbent bed core body and housing.
Fig. 2 is the structural representation of adsorbent bed core body.
The specific embodiment
For further describing architectural feature of the present invention and function, as follows below in conjunction with description of drawings:
See also Fig. 1, attachment 8 has constituted adsorbent bed core body 1 on core body end plate 4, metal U-shaped pipe 5, static input 6, aluminium fin 7 and the fin, core body 1 can only be undertaken by static input 6 core body 1 input or release electrostatic lotus by polytetrafluoroethylene (PTFE) or fluorubber material and housing 2 and the insulation of end socket 3 static.Polytetrafluoroethylene (PTFE) or fluorubber material comprise static insulated enclosure circle 9 and static insulation board 10, and static insulated enclosure circle 9 places between housing 2 and the core body end plate 4, are positioned at core body end plate 4 lower surfaces, and be affixed with housing 2 uncovered peripheries.Static insulation board 10 places between core body end plate 4 upper surfaces and end socket 3 bottom surfaces, seals affixed.
Fig. 2 is the structural representation of adsorbent bed core body 1.Adsorbent bed core body 1 is made of attachment 8 on core body end plate 4, metal U-shaped pipe 5, static input 6, aluminium fin 7 and the fin.Core body end plate 4 one sides are provided with static input 6; Metal U-shaped pipe 5 upper ends and core body end plate 4 are affixed.5 liang of upper ends of metal U-shaped pipe connect core body end plate 4, static insulation board 10 and end socket 3 base plates, communicate with two cavitys of end socket 3 respectively, see also Fig. 1.Aluminium fin 7 levels evenly distribute, and are fixed on the metal U-shaped pipe 5.Attachment 8 comprises active carbon fiber fabrics 81 on the fin, and isolated material porous ceramics 82.The upper and lower surface of each aluminium fin 7 all directly compresses adheres to active carbon fiber fabrics 81, constitutes an absorbing unit, separates with porous ceramics 82 between the absorbing unit.Porous ceramics 82 apertures enter the passage of NACF on the one hand as refrigerant vapour between 1~3mm, on the other hand, by the entire pressurisation assembling, the specific volume of extruded activated carbon fiber cloth 81 improves its bulk density, reduces thermal resistance.
Metal U-shaped pipe 5 also can be a plurality of.The average pore size of active carbon fiber fabrics 81 is answered 〉=2nm.
The present invention is to be on the basis of 01140436 patent of invention at application number, further proposes following two brand-new characteristics:
1, the adsorbent bed core body has designed static input and static insulation system, can be by the static input to NACF input or release electrostatic lotus, make the reinforcement of absorption/desorption process have controllability, reach and both strengthen adsorption process, reduce desorption temperature again, significantly improved sorption cycle efficient;
2, adopt active carbon fiber fabrics as solid absorbent, active carbon fiber fabrics passes through and the porous ceramics overall package, directly is pressed on the thermofin, need not to add binding agent, has at utmost kept the raw-material absorption property of NACF.Porous ceramics provides enough steam channels, neither influences mass transport process, does not also influence the distribution of electrostatic charge on active carbon fiber fabrics.
Implementation process:
See also Fig. 1, Fig. 2.
The cooling adsorption process: cooling water enters in the cavity from end socket 3 entrance points, and orifice plate flows into metal U-shaped pipe 5 below cavity, and fin 7 and active carbon fiber fabrics 81 are cooled off.Active carbon fiber fabrics 81 begins to adsorb the methanol vapor that riddles surrounding space by the duct of porous ceramics 82.When the vapour pressure of surrounding space was lower than the evaporating pressure of evaporimeter, the vacuum barrier valve 13 that connects adsorbent bed and evaporimeter was opened, and adsorbent absorbs the methanol vapor of flash-pot.Meanwhile, static input 6 is connected with dc power anode by control circuit, to active carbon fiber fabrics 81 input positive charges, strengthens adsorption process.Evaporimeter maintains evaporating state, absorbs in the evaporimeter heat of chilled water in the chilled water pipeline and freezes.After active carbon fiber fabrics 81 absorption was saturated, the vacuum barrier valve 13 that connects adsorbent bed and evaporimeter cut out, and the heat transport fluid pipeline is by switching, and entered in the cavity from end socket 3 entrance points from the hot water of thermal source.
The heating desorption process: hot water enters in end socket 3 cavitys from the heat transport fluid entrance point, and orifice plate flows into metal U-shaped pipe 5 below cavity, and fin 7 and active carbon fiber fabrics 81 are heated.Meanwhile, static input 6 is connected with the direct-current power supply earthing end by control circuit, discharges the positive charge on the active carbon fiber fabrics 81, strengthens desorption process.After active carbon fiber fabrics 81 was heated, the methyl alcohol that is adsorbed in wherein came out with the duct desorption of steam-like by porous ceramics 82, riddled the low vacuum space in the adsorbent bed, and vapour pressure raises gradually.Meanwhile, temperature is that the cooling water about 20 ℃ flows around the housing outside wall surface by the outer water jacket of housing, the methanol steam that desorption is come out is condensed into liquid at the inner walls face, discharge the heat of condensation, and along wall flow to the bottom, behind lime set outflow tube 11, vacuum valve 12, throttling arrangement, flow back to evaporimeter.The heat of condensation that discharges is taken away by the cooling water in the housing 2 outer surface cooling jackets.
Behind active carbon fiber fabrics 81 abundant desorptions, the vacuum valve 12 on the lime set outflow tube 11 cuts out, and the heat transport fluid pipeline is by switching, and cooling water cools off bed inner core-body 1 once more, beginning new round cooling adsorption process.

Claims (6)

1. the carbon fiber adsorption and catalytic combustion bed that electrostatic charge control is strengthened is characterized in that, between adsorbent bed core body and housing and the end socket, isolates to realize what static insulated by the fluorubber insulative material; Core body has the static input, and the adsorbent bed core body is carried out the controlled electrostatic charge that charges and discharge; When adsorbent bed was in adsorbed state, the static input linked to each other with dc power anode, and active carbon fiber fabrics charges into positive charge in bed, made the stack of the static field of force and micropore wall absorption potential, to strengthen adsorption effect; And when adsorbent bed is in detachment status, the static input is linked to each other with the direct-current power supply earthing end, and dischargeing positive charge, the balance field of force unbalance helps reducing desorption temperature.
2. carbon fiber adsorption and catalytic combustion bed according to claim 1 is characterized in that, described fluorubber insulative material is a polytetrafluoroethylene (PTFE).
3. carbon fiber adsorption and catalytic combustion bed according to claim 1 is characterized in that: described static input links to each other with earth terminal with dc power anode respectively by control circuit; The action of control circuit is synchronous with the vacuum barrier valve that is connected adsorbent bed and evaporimeter; Vapour pressure is lower than evaporator evaporation pressure in bed, and when the vacuum barrier valve was opened, the static input linked to each other with dc power anode by control circuit, adsorbs to strengthen to active carbon fiber fabrics input positive charge; Reach capacity when active carbon fiber fabrics adsorbs, when the vacuum barrier valve of connection adsorbent bed and evaporimeter cut out, the static input linked to each other with the earth terminal of dc source by control circuit, discharges positive charge, is beneficial to reduce desorption temperature.
4. carbon fiber adsorption and catalytic combustion bed according to claim 1 is characterized in that: core body is made up of core body end plate, metal U-shaped pipe, static input, aluminium fin; Core body end plate one side is provided with the static input, and lower surface has static insulated enclosure circle, links to each other with housing by static insulated enclosure circle; Metal U-shaped pipe upper end is affixed with the core body end plate; Metal U-shaped pipe two upper ends connect core body end plate, static insulation board and end socket base plate, communicate with two cavitys of end socket respectively; Aluminium fin level evenly distributes, and is fixed on the metal U-shaped pipe; The upper and lower surface of each aluminium fin is all adhered to active carbon fiber fabrics, constitutes an absorbing unit, separates with porous ceramics between the absorbing unit.
5. carbon fiber adsorption and catalytic combustion bed according to claim 4 is characterized in that: described aluminium fin and active carbon fiber fabrics and the assembling of porous ceramics entire pressurisation when improving the active carbon fiber fabrics bulk density, do not influence the refrigerant vapour passage; The thickness of active carbon fiber fabrics is at 1~3mm, and the average pore size of used porous ceramics is at 0.5~3mm, and thickness is at 3~5mm.
6. carbon fiber adsorption and catalytic combustion bed according to claim 3 is characterized in that: described metal U-shaped pipe is a plurality of; Average pore size 〉=the 2nm of active carbon fiber fabrics.
CNB2004100308413A 2004-04-08 2004-04-08 Structure of active carbon fibrous adsorptive bed with static charge reinforcing control Expired - Fee Related CN100428977C (en)

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Publication number Priority date Publication date Assignee Title
CN108592446A (en) * 2018-06-28 2018-09-28 天津商业大学 A kind of active carbon-methanol adsorption refrigeration system adsorbent bed
CN108731297A (en) * 2018-06-28 2018-11-02 天津商业大学 A kind of active carbon-methanol adsorption refrigeration system experimental bench
CN112963720B (en) * 2021-03-29 2023-03-31 中国石油大学(华东) Vehicle adsorbed natural gas storage tank

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59213423A (en) * 1983-03-24 1984-12-03 リンデ・アクチエンゲゼルシヤフト Adsorbing apparatus
CN1014652B (en) * 1984-10-31 1991-11-06 西屋电气公司 Improved overspeed protection control arrangement for steam turbine generator control systen
CN1311707A (en) * 1998-08-03 2001-09-05 东京电子株式会社 ESRF coolant degassing process
US20030070551A1 (en) * 2001-10-12 2003-04-17 Fisk John Dale Integrated filter and adsorbent unit for an integrated receiver-dryer and related method of manufacturing
WO2003046450A1 (en) * 2001-11-28 2003-06-05 Obschestvo S Ogranichennoi Otvestvennostju 'akela-N' Adsorber

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59213423A (en) * 1983-03-24 1984-12-03 リンデ・アクチエンゲゼルシヤフト Adsorbing apparatus
CN1014652B (en) * 1984-10-31 1991-11-06 西屋电气公司 Improved overspeed protection control arrangement for steam turbine generator control systen
CN1311707A (en) * 1998-08-03 2001-09-05 东京电子株式会社 ESRF coolant degassing process
US20030070551A1 (en) * 2001-10-12 2003-04-17 Fisk John Dale Integrated filter and adsorbent unit for an integrated receiver-dryer and related method of manufacturing
WO2003046450A1 (en) * 2001-11-28 2003-06-05 Obschestvo S Ogranichennoi Otvestvennostju 'akela-N' Adsorber

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