CN101464109B - High-efficiency anti-dirt nano coating heat transmission surface, its production method and pool boiling apparatus - Google Patents
High-efficiency anti-dirt nano coating heat transmission surface, its production method and pool boiling apparatus Download PDFInfo
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- CN101464109B CN101464109B CN2009100677196A CN200910067719A CN101464109B CN 101464109 B CN101464109 B CN 101464109B CN 2009100677196 A CN2009100677196 A CN 2009100677196A CN 200910067719 A CN200910067719 A CN 200910067719A CN 101464109 B CN101464109 B CN 101464109B
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Abstract
The invention discloses the efficient anti-fouling heat transfer surface of a nano coating, a method for preparing the heat transfer surface, and a pool boiling device, wherein, the heat transfer surface comprises a substrate; the substrate is coated with a nanometer material coating; the thickness of the coating is between 21 nm and 81 nm; the contact angle between the coating surface and water is 75 to 95 DEG; the contact angle between the coating surface and glycerol is 110 to 120 DEG; the surface energy is 100 to 120 mJ/m<2>; and the average roughness of the surface is 4 to 60 nm. The method comprises the following steps: (1) pre-processing the metal substrate; (2) preparing the heat transfer surface with the nano coating on the pre-processed substrate by adopting the method of vacuumdeposition; and (3) post-processing the prepared heat transfer surface of the nano coating. Compared with the common pool boiling device, the pool boiling device consisting of the heat transfer surfaces has the advantages that the adhesion force against fouling is small; the heat-transfer coefficient is high; and the non-fouling running time is prolonged by at least 8 to 20 times.
Description
Technical field
The present invention relates to high-efficiency antiscaling explosive evaporation technology and device, relate in particular to energy-conservation antiscale heating surface its preparation method and pool boiling apparatus that a kind of surface vacuum is coated with nano coating.
Background technology
The heat transmission equipment of process industrial especially has the evaporimeter with phase transformation of extensive use in industries such as chemical industry, petrochemical industry, metallurgy, fouling problem is one of difficult problem of industry common concern always.The fouling meeting descends heat exchange rate and evaporability; System pressure drop increases, and power consumption increases; The frequent parking cleaned, and causes degradation under the productivity ratio.For scale formation, though proposed many solutions, comprise physics and chemical method etc.,, still lack effective antiscale way at present.The solution fouling problem that develops into of current nanosecond science and technology has brought new hope.In recent years, the various effects of nano coating receive publicity, and have proposed to have the radiator of nano coating with sterilization (02237417.5); The interior dawn of water heater with nano coating is with anti-corrosion anti-scale (200410015508.5; 200410015509.X); The nano coating refrigeration coil that has anticorrosive coat, hydrophilic membrane and heat transfer layer is to strengthen refrigeration water saving antiscale (200410027294.3); Nano coating antisepsis oil pipe (03264264.4); The surface has the natural external circulation evaporator of the heating tube of micron coating and composition thereof to strengthen (200610013247.2) such as explosive evaporation process and antiscale.But, do not see as yet and in the basic unit that handles, adopt vacuum covering technology to prepare the nano coating heating surface with nano effect and enhanced boiling heat transfer and anti-scaling function of nanometer grade thickness and any reported in literature of pool boiling apparatus.Application number is that 200610016421.9 documents discloses the heat transfer plate that has nano-material coating of " a kind of inner surface has heat transfer plate and a kind of high-efficiency antiscaling pool boiling evaporimeter of nano-material coating ", the coating layer thickness of this heat transfer plate is preferably between 20-80nm, with glycerine and distilled water be the contact angle of the coating that characterizes of titer between 0-121 °, the surface can be at 99-210mJ/m
2Between, such heat transfer plate is compared heat transfer coefficient and is improved and to be up to 0.2 times with common heat transfer plate, the adhesive force of dirt is reduced, and non-scaling improves more than 4 times running time.But, also need further raising aspect the time at the prolongation vimala operation, simultaneously, these preparation methods still are subjected to certain limitation at aspects such as coating fastness, shapes of substrates and scale and preparation expenses, are necessary to attempt new nano coating preparation method.
Summary of the invention
The objective of the invention is to deficiency at prior art, a kind of high-efficiency anti-dirt nano coating heat transmission surface is provided, the heat transfer coefficient of this heating surface obviously improves, and heating surface is less scaling, and the pool boiling evaporator snaking cycle of being made up of heating surface of the present invention prolongs 8-20 doubly at least.
Another object of the present invention is to provide a kind of preparation method of high-efficiency anti-dirt nano coating heat transmission surface, adopt this preparation method can prepare the heating surface of higher antiscale and heat transfer property.
Further purpose of the present invention is to provide pool boiling apparatus, and this pool boiling apparatus is compared with existing pool boiling evaporimeter, and film coefficient of heat transfer improves 0.2 times, and the pool boiling apparatus snaking cycle prolongs 8-20 doubly at least.
A kind of high-efficiency anti-dirt nano coating heat transmission surface of the present invention, it comprises metallic substrates, on described metallic substrates, be coated with nano-material coating, the thickness of described coating is between 21-81nm, described coating surface to the contact angle of water at 75-95 °, at 110-120 °, the surface of described coating surface can be at 100-120mJ/m to the contact angle of glycerine
2, the mean roughness of coating surface is at 4-60nm.
The preparation method of nano coating heating surface of the present invention, it may further comprise the steps:
(1) metallic substrates is carried out preliminary treatment;
Described pre-treatment step comprises polishing, polishing and decontamination step successively; Described polishing step is for the diamond dust that adopts 300-800# carries out polishing more than at least 2 times to metallic substrates, reach with bore hole do not see any uneven till; Then metallic substrates is carried out polishing, use diameter to carry out machine glazed finish more than at least 2 times during polishing as the emery grinding grease of 0.5-3 μ m, up to the substrate surface mean roughness at 4-60nm, remove the spot that leaves on the metallic substrates of polishing back at last, decontamination step is the sodium hydroxide solution of 5-30% for mass percent is immersed in described substrate, keep 5-30min, remove the part grease, the acetone soln of then substrate of taking out being put into mass percent and be 99.5-99.999% carries out taking out behind the ultrasonic cleaning 5-60min, use distilled water ultrasonic cleaning substrate 5-30min again, to remove the remaining reagent of substrate surface, at last the substrate of taking out is done 8-24h at indoor natural wind;
(2) in the pretreated substrate of described process, adopt the preparation of vacuum covering method to have the heating surface of nano coating, described vacuum covering method is: at first described substrate after air-dry is placed in the box filming equipment of vacuum that vacuum is 9.5 * 10-5-5 * 10-4Pa, keeping described substrate then is that mass percent purity on the electron gun bombardment electron beam evaporation source of 6-10kW is that the coating material of 99.9-99.999% is so that its evaporation with power with the rotational speed of 5-30r/min simultaneously, be deposited on to wait to be coated with after the evaporation of described coating material and make the nano coating heating surface on the substrate surface, the evaporation rate of described coating material is 0.3 * 10
-10-1.2 * 10
-10M/s;
(3) the described nano coating heating surface that makes is carried out post processing;
Described post-processing step comprise the described nano coating heating surface that makes put into Muffle furnace and is heated to 80-500 ℃ with the programming rate of 1-10 ℃/min after, keep heat-treating in 8-24 hour, drop to room temperature more naturally.
3. pool boiling apparatus, it comprises:
(1) boiling pool, described boiling pool comprises the heating surface that sets within it, described heating surface comprises metallic substrates, be coated with nano-material coating on the described metallic substrates, the thickness of described coating is between 21-81nm, at 75-95 °, at 110-120 °, the surface of described coating surface can be at 100-120mJ/m to the contact angle of glycerine to the contact angle of water for described coating surface
2, the mean roughness of coating surface is at 4-60nm;
(2) condensers, this condenser links to each other with the top of described boiling pool by a tube connector;
(3) preheaters, this preheater is immersed in the described boiling pool;
(4) heating rods, this heating rod place described heating surface bottom in the boiling pool;
(5) one cover subsystems, this subsystem comprises heating power supply that links to each other with described heating rod and the pressure regulator that links to each other with described heating power supply;
(6) one sleeving temperature parameter acquisition and control systems, this parameter acquisition system comprises the temperature sensor that is arranged on the described heating rod, being used for of linking to each other with the signal output part of described temperature sensor amplifies temperature signal and analog-to-digital analog-digital converter, signal that is used for the output of described analog-digital converter writes down and gathers and controlling value passed to the computer of described control system according to described temperature measurement result and setting value after relatively, and described control system comprises receiving described controlling value signal and it being carried out digital-to-analogue conversion and is transferred to described pressure regulator to control the digital to analog converter of its switch.
The heating surface that has nano coating that the present invention relates to, because coating surface has lower surface energy and strong hydrophobicity, thereby the pool boiling apparatus of being made up of this heating surface is compared with common pool boiling apparatus, adhesive force to dirt is little, and the heat transfer coefficient height, pool boiling evaporator can efficient for a long time vimala operation.With application number is that disclosed heat transfer plate is compared in 200610016421.9 the documents, and the adhesive force of dirt is reduced, and non-scaling prolongs 8-20 doubly running time at least.
Description of drawings
Fig. 1 is the front view of pool boiling apparatus of the present invention;
Fig. 2 is the schematic diagram of the nano coating heating surface cross section I in the device shown in Figure 1.
The specific embodiment
Describe the present invention below in conjunction with the drawings and specific embodiments.
Of the present invention a kind of high-efficiency anti-dirt nano coating heat transmission surface as shown in Figure 2, it comprises substrate 2-2, can be steel or copper material, to the thickness of metallic substrates without limits, for example, can be industrial sheet metal thickness scope 0.1-20mm commonly used.Be coated with the coating 2-1 of one deck nanometer grade thickness on the described substrate 2-2.The thickness of described coating is between 21-81nm, and at 75-95 °, the contact angle of glycerine is at 110-120 ° to the contact angle of water for described coating surface, and the surface can be at 100-120mJ/m
2, surface average roughness is at 4-60nm.Because generally below 100nm, so coating layer thickness value of the present invention is between 21-81nm, less thickness also helps reducing the adverse effect of coating layer thickness to diabatic process to the range scale with nano effect.The scope 100-120mJ/m of lower surface energy
2Can make the pool boiling apparatus non-scaling prolong 8-20 at least doubly running time.
The preparation method of nano coating heating surface of the present invention, it may further comprise the steps: (1) carries out preliminary treatment to metallic substrates; Described pre-treatment step comprises polishing, polishing and decontamination step successively; Described polishing step is for adopting 300-800
#Diamond dust metallic substrates is carried out polishing more than at least 2 times, reach with bore hole do not see any uneven till; Then metallic substrates is carried out polishing, use diameter to carry out machine glazed finish more than at least 2 times during polishing as the emery grinding grease of 0.5-3 μ m, up to the substrate surface mean roughness at 4-60nm, remove the spot that leaves on the metallic substrates of polishing back at last, decontamination step is described the sodium hydroxide solution that mass percent is 5-30% to be immersed in substrate, keep 5-30min, remove the part grease, the acetone soln of then substrate of taking out being put into mass percent and be 99.5-99.999% carries out taking out behind the ultrasonic cleaning 5-60min, use distilled water ultrasonic cleaning substrate 5-30min again, to remove the remaining reagent of substrate surface, at last the substrate of taking out is done 8-24h at indoor natural wind; (2) adopt the preparation of vacuum covering method to have the heating surface of nano coating in the pretreated substrate of described process, described vacuum covering method is: at first described substrate after air-dry being placed on vacuum is 9.5 * 10
-5-5 * 10
-4In the box filming equipment of the vacuum of Pa, keeping described substrate then is that mass percent purity on the electron gun bombardment electron beam evaporation source of 6-10kW is that the coating material of 99.9-99.999% is so that its evaporation with power with the rotational speed of 5-30r/min simultaneously, be deposited on to wait to be coated with after the evaporation of described coating material and make the nano coating heating surface on the substrate surface, the evaporation rate of described coating material is 0.3 * 10
-10-1.2 * 10
-10M/s; (3) the described nano coating heating surface that makes is carried out post processing; Described post-processing step comprise the described nano coating heating surface that makes put into Muffle furnace and is heated to 80-500 ℃ with the programming rate of 1-10 ℃/min after, keep heat-treating in 8-24 hour, drop to room temperature more naturally.
Adopt the inventive method can prepare the nano coating of the materials such as metal, metal oxide, fluoride of different-thickness, described metal is Ti, Al, Cr, Zn, Fe, Mg etc., and metal oxide is Cr
2O
3, TiO
2, Al
2O
3, ZnO, Fe
2O
3Deng, metal fluoride is CaF
2, MgF
2, ZnF
2Deng.
The nano coating that makes is carried out the characteristic present, comprise: surface topography, roughness, thickness, contact angle, surface energy etc., can adopt multiple means to measure these parameters, for example, adopt prefabricated benching tunnelling method, one-tenth point-score, weight method, section survey method to survey thickness, adopt weight measurement method, angular measurement, contact angle measurement etc. to survey contact angle, employing AFM etc. characterizes surface topography and roughness etc.
Fig. 1 is a pool boiling apparatus of the present invention, it comprises: (1) boiling pool 5, described boiling pool comprises the heating surface that sets within it, described heating surface 2 comprises substrate, be coated with nano-material coating in the described substrate, the thickness of described coating between 21-81nm, described coating surface to the contact angle of water at 75-95 °, the contact angle of glycerine is at 110-120 °, and the surface can be at 100-120mJ/m
2, surface average roughness is at 4-60nm; (2) condensers 4, this condenser links to each other with the top of described boiling pool by a tube connector; (3) preheaters 1, this preheater is immersed in the described boiling pool; (4) heating rods 3, this heating rod place described heating surface bottom in the boiling pool; (5) one cover subsystems 8, this subsystem comprises heating power supply that links to each other with described heating rod and the pressure regulator that links to each other with described heating power supply; (6) one sleeving temperature parameter acquisitions and control system 6,7, this parameter acquisition system comprises the temperature sensor that is arranged on the described heating rod, being used for of linking to each other with the signal output part of described temperature sensor amplifies temperature signal and analog-to-digital analog-digital converter, signal that is used for the output of described analog-digital converter writes down and gathers and controlling value passed to the computer of described control system according to described temperature measurement result and setting value after relatively, and described control system comprises receiving described controlling value signal and it being carried out digital-to-analogue conversion and is transferred to described pressure regulator to control the digital to analog converter of its switch.Thereby described pressure regulator is controlled the temperature of described heating rod.Whole pool boiling apparatus system is in use by heat-insulation layer 9 insulations.Described pressure regulator, condenser, preheater all can be buied in market.The high-efficiency antiscaling nanometer heating surface of pool boiling evaporator links to each other with an inlet of condenser through boiling pool, and the outlet of closing is arranged at condenser top, and the condensate liquid natural back flow is to boiling pool.This device adopts atmospheric operation, and is obvious for the evaporation material effect of easy generation crystallization dirt.To the thermal sensitivity feed liquid, can adopt vacuumizing.When parameters such as the proportion of evaporation and concentration liquid or concentration reach technological requirement, stop evaporation and concentration.
Embodiment 1
Metallic substrates copper is carried out preliminary treatment earlier; Described pre-treatment step comprises polishing, polishing and decontamination step successively; Described polishing step is for adopting 600
#Diamond dust metallic substrates is carried out 2 times polishing, reach with bore hole do not see any uneven till; Then metallic substrates is carried out polishing, using diameter during polishing is that the emery grinding grease of 1 μ m carries out 2 polishings, till substrate surface be can't see rough cut with bore hole, remove the spot that leaves on the metallic substrates of polishing back at last, decontamination step is that described mass percent is immersed in substrate is 20% sodium hydroxide solution, keep 20min, remove the part grease, then the substrate of taking out being put into mass percent and be 99.9% acetone soln carries out taking out behind the ultrasonic cleaning 40min, use distilled water ultrasonic cleaning substrate 15min again, to remove the remaining reagent of substrate surface, at last the substrate of taking out is done 15h at indoor natural wind;
Adopt the preparation of vacuum covering method to have the heating surface of nano coating in the pretreated substrate of described process, described vacuum covering method is: at first described substrate being placed on vacuum is 2 * 10
-4In the box filming equipment of the vacuum of Pa, keeping described substrate then is that mass percent purity on the electron gun bombardment electron beam evaporation source of 8kW is that 99.99% coating material is so that its evaporation with power with the rotational speed of 15r/min simultaneously, described coating material is deposited on to wait to be coated with and makes the nano coating heating surface on the substrate surface, and the evaporation rate of described coating material is 0.6 * 10
-10M/s.
Post processing is carried out on described nano coating surface; Described post-processing step comprise described nano coating surface is placed in the Muffle furnace programming rate with 5 ℃/min and is heated to 200 ℃ after, keep heat-treating in 10 hours;
The thickness of the coating through measuring described nano coating surface is at 60nm, and at 88 °, the contact angle of glycerine is at 119 ° to the contact angle of water for described coating surface, and the surface can be at 112mJ/m
2, surface average roughness is at 55nm.
Described nano coating heating surface is packed in the pool boiling apparatus after tested: the pool Boiling Heat Transfer coefficient of saturated calcium carbonate aqueous solution improves 0.10 times than the coefficient of untreatment surface under the normal temperature, and non-scaling prolongs 15 times running time.
Embodiment 2
The metallic substrates carbon steel is carried out preliminary treatment earlier; Described pre-treatment step comprises polishing, polishing and decontamination step successively; Described polishing step is for adopting 300
#Diamond dust metallic substrates is carried out 3 times polishing, reach do not see any cut with bore hole till; Then metallic substrates is carried out polishing, using diameter during polishing is that the emery grinding grease of 0.5 μ m carries out 3 polishings, till substrate surface be can't see rough cut with bore hole, remove the spot that leaves on the metallic substrates of polishing back at last, decontamination step is that described mass percent is immersed in substrate is 5% sodium hydroxide solution, keep 5min, remove the part grease, then the substrate of taking out being put into mass percent and be 99.5% acetone soln carries out taking out behind the ultrasonic cleaning 5min, use distilled water ultrasonic cleaning substrate 5min again, to remove the remaining reagent of substrate surface, at last the substrate of taking out is done 8h at indoor natural wind;
Adopt the preparation of vacuum covering method to have the heating surface of nano coating in the pretreated substrate of described process, described vacuum covering method is: at first described substrate being placed on vacuum is 5 * 10
-4In the box filming equipment of the vacuum of Pa, keeping described substrate then is that mass percent purity on the electron gun bombardment electron beam evaporation source of 6kW is that 99.9% coating material is so that its evaporation with power with the rotational speed of 5r/min simultaneously, described coating material is deposited on to wait to be coated with and makes the nano coating heating surface on the substrate surface, and the evaporation rate of described coating material is 0.3 * 10
-10M/s.
Post processing is carried out on described nano coating surface; Described post-processing step comprise described nano coating surface is placed in the Muffle furnace programming rate with 1 ℃/min and is heated to 80 ℃ after, keep heat-treating in 24 hours;
The thickness of the coating through measuring described nano coating surface is at 21nm, and at 95 °, the contact angle of glycerine is at 120 ° to the contact angle of water for described coating surface, and the surface can be at 100mJ/m
2, surface average roughness is at 60nm.
Described nano coating heating surface is packed in the pool boiling apparatus after tested: the pool Boiling Heat Transfer coefficient of saturated calcium carbonate aqueous solution improves 0.15 times than the coefficient of untreatment surface under the normal temperature, and non-scaling prolongs 8 times running time.
Embodiment 3
The metallic substrates stainless steel is carried out preliminary treatment earlier; Described pre-treatment step comprises polishing, polishing and decontamination step successively; Described polishing step is for adopting 800
#Diamond dust metallic substrates is carried out 2 times polishing, reach with bore hole do not see any uneven till; Then metallic substrates is carried out polishing, using diameter during polishing is that the emery grinding grease of 3 μ m carries out 2 polishings, till substrate surface be can't see cut with bore hole, remove the spot that leaves on the metallic substrates of polishing back at last, decontamination step is that described mass percent is immersed in substrate is 30% sodium hydroxide solution, keep 30min, remove the part grease, then the substrate of taking out being put into mass percent and be 99.999% acetone soln carries out taking out behind the ultrasonic cleaning 60min, use distilled water ultrasonic cleaning substrate 30min again, to remove the remaining reagent of substrate surface, at last the substrate of taking out is done 24h at indoor natural wind;
Adopt the preparation of vacuum covering method to have the heating surface of nano coating in the pretreated substrate of described process, described vacuum covering method is: at first described substrate being placed on vacuum is 9.5 * 10
-5In the box filming equipment of the vacuum of Pa, keeping described substrate then is that mass percent purity on the electron gun bombardment electron beam evaporation source of 10kW is that 99.999% coating material is so that its evaporation with power with the rotational speed of 30r/min simultaneously, described coating material is deposited on to wait to be coated with and makes the nano coating heating surface on the substrate surface, and the evaporation rate of described coating material is 1.2 * 10
-10M/s.
Post processing is carried out on described nano coating surface; Described post-processing step comprise described nano coating surface is placed in the Muffle furnace programming rate with 10 ℃/min and is heated to 500 ℃ after, keep heat-treating in 8 hours;
The thickness of the coating through measuring described nano coating surface is at 81nm, and at 75 °, the contact angle of glycerine is at 110 ° to the contact angle of water for described coating surface, and the surface can be at 120mJ/m
2, surface average roughness is at 4nm.
Described nano coating heating surface is packed in the pool boiling apparatus after tested: the pool Boiling Heat Transfer coefficient of saturated calcium carbonate aqueous solution improves 0.2 times than the coefficient of untreatment surface under the normal temperature, and non-scaling prolongs 20 times running time.
Claims (3)
1. high-efficiency anti-dirt nano coating heat transmission surface, it comprises metallic substrates, on described metallic substrates, be coated with nano-material coating, it is characterized in that: the thickness of described coating is between 21-81nm, described coating surface to the contact angle of water at 75-95 °, at 110-120 °, the surface of described coating surface can be at 100-120mJ/m to the contact angle of glycerine
2, the mean roughness of coating surface is at 4-60nm.
2. preparation method who realizes the described nano coating heating surface of claim 1 is characterized in that it may further comprise the steps:
(1) metallic substrates is carried out preliminary treatment;
Described pre-treatment step comprises polishing, polishing and decontamination step successively; Described polishing step is for adopting 300-800
#Diamond dust metallic substrates is carried out polishing more than at least 2 times, reach with bore hole do not see any uneven till; Then metallic substrates is carried out polishing, use diameter to carry out machine glazed finish more than at least 2 times during polishing as the emery grinding grease of 0.5-3 μ m, up to the substrate surface mean roughness at 4-60nm, remove the spot that leaves on the metallic substrates of polishing back at last, decontamination step is the sodium hydroxide solution of 5-30% for mass percent is immersed in described substrate, keep 5-30min, remove the part grease, the acetone soln of then substrate of taking out being put into mass percent and be 99.5-99.999% carries out taking out behind the ultrasonic cleaning 5-60min, use distilled water ultrasonic cleaning substrate 5-30min again, to remove the remaining reagent of substrate surface, at last the substrate of taking out is done 8-24h at indoor natural wind;
(2) adopt the preparation of vacuum covering method to have the heating surface of nano coating in the pretreated substrate of described process, described vacuum covering method is: at first described substrate after air-dry being placed on vacuum is 9.5 * 10
-5-5 * 10
-4In the box filming equipment of the vacuum of Pa, keeping described substrate then is that mass percent purity on the electron gun bombardment electron beam evaporation source of 6-10kW is that the coating material of 99.9-99.999% is so that its evaporation with power with the rotational speed of 5-30r/min simultaneously, be deposited on to wait to be coated with after the evaporation of described coating material and make the nano coating heating surface on the substrate surface, the evaporation rate of described coating material is 0.3 * 10
-10-1.2 * 10
-10M/s;
(3) the described nano coating heating surface that makes is carried out post processing;
Described post-processing step comprise the described nano coating heating surface that makes put into Muffle furnace and is heated to 80-500 ℃ with the programming rate of 1-10 ℃/min after, keep heat-treating in 8-24 hour, drop to room temperature more naturally.
3. pool boiling apparatus is characterized in that it comprises:
(1) boiling pool, described boiling pool comprises the heating surface that sets within it, described heating surface comprises metallic substrates, be coated with nano-material coating on the described metallic substrates, the thickness of described coating is between 21-81nm, at 75-95 °, at 110-120 °, the surface of described coating surface can be at 100-120mJ/m to the contact angle of glycerine to the contact angle of water for described coating surface
2, the mean roughness of coating surface is at 4-60nm;
(2) condensers, this condenser links to each other with the top of described boiling pool by a tube connector;
(3) preheaters, this preheater is immersed in the described boiling pool;
(4) heating rods, this heating rod place described heating surface bottom in the boiling pool;
(5) one cover subsystems, this subsystem comprises heating power supply that links to each other with described heating rod and the pressure regulator that links to each other with described heating power supply;
(6) one sleeving temperature parameter acquisition and control systems, this parameter acquisition system comprises the temperature sensor that is arranged on the described heating rod, being used for of linking to each other with the signal output part of described temperature sensor amplifies temperature signal and analog-to-digital analog-digital converter, signal that is used for the output of described analog-digital converter writes down and gathers and controlling value passed to the computer of described control system according to described temperature measurement result and setting value after relatively, and described control system comprises receiving described controlling value signal and it being carried out digital-to-analogue conversion and is transferred to described pressure regulator to control the digital to analog converter of its switch.
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| CN109163597A (en) * | 2018-09-03 | 2019-01-08 | 中国科学院工程热物理研究所 | Stannic oxide/graphene nano coating and preparation method thereof |
| CN110237554A (en) * | 2019-07-08 | 2019-09-17 | 中国科学院理化技术研究所 | A kind of falling film evaporation system and method |
| CN114237368A (en) * | 2021-12-13 | 2022-03-25 | 大连大学 | Heat radiation method for central processing unit |
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