CN104857734A - Microwave-evaporation device, application and application method thereof - Google Patents
Microwave-evaporation device, application and application method thereof Download PDFInfo
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- CN104857734A CN104857734A CN201510211058.5A CN201510211058A CN104857734A CN 104857734 A CN104857734 A CN 104857734A CN 201510211058 A CN201510211058 A CN 201510211058A CN 104857734 A CN104857734 A CN 104857734A
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- 238000001704 evaporation Methods 0.000 title claims abstract description 129
- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000008020 evaporation Effects 0.000 claims abstract description 124
- 239000007788 liquid Substances 0.000 claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 239000013535 sea water Substances 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 25
- 238000004131 Bayer process Methods 0.000 claims abstract description 23
- 239000012153 distilled water Substances 0.000 claims abstract description 22
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 5
- 239000012452 mother liquor Substances 0.000 claims description 22
- 238000007599 discharging Methods 0.000 claims description 21
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 11
- 229910010293 ceramic material Inorganic materials 0.000 claims description 7
- 238000009833 condensation Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 230000000873 masking effect Effects 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910002113 barium titanate Inorganic materials 0.000 claims description 2
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052796 boron Inorganic materials 0.000 claims description 2
- 239000006229 carbon black Substances 0.000 claims description 2
- 239000004927 clay Substances 0.000 claims description 2
- 229910052570 clay Inorganic materials 0.000 claims description 2
- 239000000243 solution Substances 0.000 abstract description 9
- 230000018044 dehydration Effects 0.000 abstract description 3
- 238000006297 dehydration reaction Methods 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract 4
- 239000010413 mother solution Substances 0.000 abstract 2
- 238000009834 vaporization Methods 0.000 description 9
- 230000008016 vaporization Effects 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 239000000047 product Substances 0.000 description 5
- 230000032683 aging Effects 0.000 description 4
- 230000002209 hydrophobic effect Effects 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 230000035882 stress Effects 0.000 description 4
- 239000012780 transparent material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 239000003085 diluting agent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 240000004859 Gamochaeta purpurea Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000008364 bulk solution Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000004807 desolvation Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 238000000935 solvent evaporation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention relates to a microwave-evaporation device, an application and an application method thereof, belonging to the technical field of microwave equipment. The microwave-evaporation device comprises a material tank, a liquid drop generation device, a microwave evaporation device and an evaporable water recycling device. The microwave-evaporation device can be used for seawater evaporation recycling as well as evaporation and concentration of a mother solution after Bayer process seed pregnant solution decomposition. The application method comprises the steps of: firstly, controlling pressure of the microwave evaporation device and the evaporable water recycling device within 0.01-0.03 Mpa, adding the seawater or Bayer process seed pregnant solution to the mother solution in the material tank to form liquid drops with the grain diameter of 1-3 mm in the evaporation tank, then performing microwave evaporation to obtain water steam, condensing the water steam and recycling the condensed water steam by a distilled water collection tank to obtain condensed seawater or condensed Bayer process seed pregnant solution. The microwave-evaporation device calls off an intermediate circulating pump and a steam heat transfer system, and gives full play to characteristics of microwave selective dehydration.
Description
Technical field
The present invention relates to a kind of microwave-vaporising device, application and application process, belong to microwave equipment technical field.
Background technology
Evaporation process is a high energy consumption process, the order evaporated in production ground normally: (1) obtains concentrated solution directly as chemical products or semi-finished product; (2) nationality evaporation is with desolvation, by solution enrichment to saturation state, is cooled subsequently, separates out solid product, namely adopts evaporation, crystallization joint operation to obtain solid solute; (3) imurity-removal, making pure neat solvent.
The essence of tradition evaporation process is the transmission of heat, and the speed of solvent evaporation depends on rate of heat transfer, and therefore, evaporation operation should belong to diabatic process.Evaporation equipment conventional at present has: downward film evaporator, film-rising evaporator, forced-circulation evaporator, evaporator with external heating unit, evaporator with submerged combustion, calandria type evaporator etc.
But due to steam or other thermal source heat exchange can only be adopted to supply the energy needed for evaporation, there is following problem in traditional evaporation process:
(1) evaporation efficiency is low, often needs to adopt complicated vapo(u)rization system that is multistage or multiple-effect, and equipment investment is large; (2) concentrated solution is everlasting and the area of heating surface is separated out solute and forms dirty layer in boiling vaporescence, reduces heat transfer coefficient, energy consumption is increased; (3) solvent carburation by evaporation need absorb a large amount of heat of gasification, and therefore, evaporation operation is highly energy-consuming process.4) traditional evaporation equipment needs the steam heat-exchanging system of feed liquid heating between complicated material liquid and each effect, and adopts high temperature resistant, corrosion resistant intercycle pump valve, need frequently change, investment and operating cost high.
Microwave be a kind of can fast, the electromagnetic wave of original position transferring energy, be also a kind of green, fast, efficient, the novel energy that is easy to automatic control.The report utilizing microwave to realize desalinization as the energy is less, and Application way is mostly the simple evaporator pattern that directly adopts, and adopts microwave directly to heat bulk solutions.
Adopt microwave evaporation equipment can recycle evaporation of seawater and at aluminium oxide in aluminum oxide production process, the mother liquor that Bayer-process seed-separating mother liquor obtains after decomposing must carry out evaporation and concentration, discharge unnecessary moisture, to keep the water balance in production procedure (circulatory system).
The water gross reserves in the whole world is 13.86 hundred million km
3wherein 96.5% is seawater, other are distributed in land, air and organism, be about 2.53%, the wherein underground being stored in more than glacier, snow lid and the 750m degree of depth more, and the river that can take, lake water and phreatic water etc. only account for about 0.2%, also comprise the bitter of a large portion here.
The desalting process of multistage flash evaporation, in current various desalination technology, multistage flash evaporation occupies leading position, and it is made water scale and accounts for 60 % always making water scale in the world, and Technical comparing is ripe, and is particularly suitable for steam power plant and carries out electricity-water cogeneration.But the shortcoming such as the method also exists, and equipment investment is high, evaporation efficiency is low, energy consumption is large, the high corrosion of cost is fast, heat transfer efficiency is low and equipment operating elasticity is little, cannot realize the desalinization process of low-cost high-efficiency.Utility model patent CN202744353U " a kind of heating using microwave desalinization spray gas collecting apparatus ", be adopt microwave first heating seawater, then seawater enters vaporization chamber through spray head with drops, realizes desalinization.This patent have employed heating using microwave seawater, saves the heating of seawater time, and adopts spray to add water vapour vaporization area.But the latent heat of vaporization of water is comparatively large, needs a large amount of heats in drop evaporation process, provide evaporation institute calorific requirement, and not additional heat supply in the evaporation process of drop in vaporization chamber, this is by the evaporation effect of restriction drop; In addition, reach good evaporation effect, seawater needs to be heated to higher temperature.
Summary of the invention
The present invention is directed to prior art Problems existing and deficiency, the invention provides a kind of microwave-vaporising device, application and application process.The mother liquor that microwave-vaporising device of the present invention can be recycled evaporation of seawater and obtain after Bayer-process seed-separating mother liquor decomposition carries out evaporation and concentration, this device eliminates intercycle pump and steam heat-exchanging system, give full play to the feature of microwave selective dehydration, the present invention is achieved through the following technical solutions.
A kind of microwave-vaporising device, comprises head tank 1, dropproducing devices, microwave evaporation device and evaporation water retracting device, dropproducing devices comprises feed pump 2, by-pass valve control and high-pressure nozzle 12, microwave evaporation device comprises magnetron 3, demister 4, thermocouple 5, steam (vapor) outlet 6, evaporator 7, by-pass valve control 11, discharging pump 13, evaporation bed 14, material liquid outlet 15, rotating shaft 16, bearing 17 and sealing ring 18, evaporation water retracting device comprises stram condenser 8, distilled water collecting tank 9 and vavuum pump 10, head tank 1 discharging opening successively with feed pump 2, by-pass valve control is connected with high-pressure nozzle 12 pipeline, high-pressure nozzle 12 is positioned at evaporator 7 inner upper end by pipeline from the insertion of evaporator 7 side, the outside surrounding of evaporator 7 evenly arranges magnetron 3, evaporator 7 installs some thermocouples 5 according to actual conditions, by rotating shaft 16 immediately below evaporator 7 internal high pressure shower nozzle 12, bearing 17 and sealing ring 18 are provided with evaporation bed 14, evaporation bed 14 is adjustable in 0 ° ~ 90 ° by rotating shaft 16, by regulating the angle of evaporation bed 14, control thickness of liquid film and feed liquid time of staying in vaporization chamber, material liquid outlet 15 is provided with bottom evaporator 7, material liquid outlet 15 is connected with two pipelines, a direct connection control valve of pipeline, another root pipeline connects back high-pressure nozzle 12 pipeline by by-pass valve control, evaporator 7 inner upper is provided with demister 4, evaporator 7 top is provided with steam (vapor) outlet 6, steam (vapor) outlet 6 successively with stram condenser 8, distilled water collecting tank 9 is connected with vavuum pump 10 pipeline.
Heat-insulation layer is provided with between described evaporator 7 and magnetron 3.
Described high-pressure nozzle 12 adopts the modified and reinforced King of PTFE to process, and it has fabulous temperature tolerance (-200 to+260 DEG C), the not resistance to viscosity of corrosion resistance, ageing resistance, hydrophobic and machinability; Meanwhile, it is that electromagnetic wave transparent material does not absorb microwave substantially, thus ensures the even of vaporization chamber Space Microwave under multimode radiation.
Described evaporation bed 14 adopts to be made up of carborundum, silicon nitride, aluminium oxide, boron sikicate aluminum, barium titanate, clay or carbon black microwave-absorbing ceramic material.
The mother liquor that this device is recycled evaporation of seawater and obtained after Bayer-process seed-separating mother liquor decomposition carries out evaporation and concentration.
An application process for above-mentioned microwave-vaporising device, its concrete steps are as follows:
Step 1, pressure regulate: be first 0.01 ~ 0.03Mpa by vavuum pump 10 by the Stress control of microwave evaporation device and evaporation water retracting device;
Step 2, make and drip: seawater or Bayer-process seed-separating mother liquor are joined in head tank 1, then seawater or Bayer-process seed-separating mother liquor are by feed pump 2 and high-pressure nozzle 12, and the drop making seawater or Bayer-process seed-separating mother liquor form particle diameter 1 ~ 3mm enters evaporator 7;
Step 3, masking: droplets fall step 2 obtained forms liquid film to the evaporation bed 14 in evaporator 7;
Step 4, microwave evaporation: while carrying out step 2 and 3, open the magnetron 3 of evaporator 7, adopts the drop in the direct heating evaporation tank 7 of microwave and liquid film, and evaporate bed simultaneously and absorb microwave energy, indirect liquid film and whole evaporator 7 obtain steam;
Step 5, collection of products: the steam obtained through step 4 is after demister 4, overflowed from evaporator 7 fast by negative pressure mode, enter stram condenser 8 condensation, condensed water reclaims through distilled water collecting tank 9 and obtains distilled water, and obtains concentrated seawater or concentrating spent Bayer process seed precipitation solution.
The wherein application process of material liquid outlet 15: (1) seawater or Bayer-process seed-separating mother liquor flush distillation reach standard: open feed pump 2, close discharging pump 13, Open valve 11a simultaneously, valve-off 11b and 11c, until feed liquid in head tank 1 all after microwave evaporation is concentrated, closes microwave source 3, vavuum pump 10 and feed pump 2, and vacuum in delivery system, when whole system reaches normal pressure, open discharging pump 13, after concentrated, feed liquid reclaims through exporting 15, (2) seawater or Bayer-process seed-separating mother liquor repeatedly need evaporate the standard of reaching: open feed pump 2 and discharging pump 13 simultaneously, and open valve 11a and 11b, valve-off 11c, concentrate bottom evaporator 7 is fallen within through material liquid outlet 15 by evaporation bed 14, after being mixed by the solvent or diluent liquid in pipeline and head tank, again evaporator 7 is entered by high-pressure nozzle 12, repetition like this is until reach evaporation demand, after whole feed liquid evaporation to be done, close microwave source 3, vavuum pump 10 and feed pump 2, and vacuum in delivery system, Open valve 11c simultaneously, valve-off 11a and 11b, when whole system reaches normal pressure, open discharging pump 13, after concentrated, feed liquid reclaims through exporting 15.
The invention has the beneficial effects as follows:
(1) mother liquor adopting this device to recycle evaporation of seawater and to obtain after Bayer-process seed-separating mother liquor decomposition carries out evaporation and concentration, and this device eliminates intercycle pump and steam heat-exchanging system, gives full play to the feature of microwave selective dehydration;
(2) this device eliminates circulating pump and the significant corrosion problems of steam heat-exchanging system under HTHP harsh conditions, and the present invention is large due to equipment cavity, thoroughly solves originally to have a strong impact on the heat exchange of efficiency, the scale problems of evaporation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is evaporator structural representation of the present invention;
Fig. 3 is present invention process flow chart.
In figure: 1-head tank, 2-feed pump, 3-magnetron, 4-demister, 5-thermocouple, 6-steam (vapor) outlet, 7-evaporator, 8-stram condenser, 9-distilled water collecting tank, 10-vavuum pump, 11-by-pass valve control, 12-high-pressure nozzle, 13-discharging pump, 14-evaporates bed, 15-material liquid outlet, 16-rotating shaft, 17-bearing, 18-sealing ring.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Embodiment 1
As illustrated in fig. 1 and 2, this microwave-vaporising device, comprises head tank 1, dropproducing devices, microwave evaporation device and evaporation water retracting device, dropproducing devices comprises feed pump 2, by-pass valve control 11 and high-pressure nozzle 12, microwave evaporation device comprises magnetron 3, demister 4, thermocouple 5, steam (vapor) outlet 6, evaporator 7, by-pass valve control, discharging pump 13, evaporation bed 14, material liquid outlet 15, rotating shaft 16, bearing 17 and sealing ring 18, evaporation water retracting device comprises stram condenser 8, distilled water collecting tank 9 and vavuum pump 10, head tank 1 discharging opening successively with feed pump 2, by-pass valve control is connected with high-pressure nozzle 12 pipeline, high-pressure nozzle 12 is positioned at evaporator 7 inner upper end by pipeline from the insertion of evaporator 7 side, the outside surrounding of evaporator 7 evenly arranges magnetron 3, evaporator 7 installs some thermocouples 5 according to actual conditions, by rotating shaft 16 immediately below evaporator 7 internal high pressure shower nozzle 12, bearing 17 and sealing ring 18 are provided with evaporation bed 14, evaporation bed 14 is adjustable in 0 ° ~ 90 ° by rotating shaft 16, material liquid outlet 15 is provided with bottom evaporator 7, material liquid outlet 15 is connected with two pipelines, a direct connection control valve of pipeline, another root pipeline connects back high-pressure nozzle 12 pipeline by by-pass valve control, and evaporator 7 inner upper is provided with demister 4, evaporator 7 top is provided with steam (vapor) outlet 6, steam (vapor) outlet 6 successively with stram condenser 8, distilled water collecting tank 9 is connected with vavuum pump 10 pipeline.
Wherein be provided with heat-insulation layer between evaporator 7 and magnetron 3; Described high-pressure nozzle 12 adopts the modified and reinforced King of PTFE to process, and it has fabulous temperature tolerance (-200 to+260 DEG C), the not resistance to viscosity of corrosion resistance, ageing resistance, hydrophobic and machinability; Meanwhile, it is that electromagnetic wave transparent material does not absorb microwave substantially, thus ensures the even of vaporization chamber Space Microwave under multimode radiation; Evaporation bed 14 adopts carborundum microwave-absorbing ceramic material to make.
As shown in Figure 3, this device is recycled evaporation of seawater and is carried out evaporation and concentration, and its concrete steps of application process are as follows:
Step 1, pressure regulate: be first 0.01Mpa by vavuum pump 10 by the Stress control of microwave evaporation device and evaporation water retracting device;
Step 2, make and drip: joined by 30L seawater in head tank 1, then seawater is by feed pump 2 and high-pressure nozzle 12, and the drop making seawater form particle diameter 1mm enters evaporator 7;
Step 3, masking: droplets fall step 2 obtained forms liquid film to the evaporation bed 14 in evaporator 7, wherein evaporation bed 14 adjusts angle of inclination is 0 °;
Step 4, microwave evaporation: while carrying out step 2 and 3, open the magnetron 3 of evaporator 7, adopt the drop in the direct heating evaporation tank 7 of microwave and liquid film, evaporate bed simultaneously and absorb microwave energy, indirect liquid film and whole evaporator 7 obtain steam, and wherein microwave power is 800W, frequency is 2.45GHz;
Step 5, collection of products: the steam obtained through step 4, after demister 4, is overflowed fast by negative pressure mode, entered stram condenser 8 condensation from evaporator 7, condensed water reclaims through distilled water collecting tank 9 and obtains 20.1L distilled water, and obtains concentrated seawater.
The wherein application process of material liquid outlet 15: open feed pump 2 in evaporation process, close discharging pump 13, Open valve 11a simultaneously, valve-off 11b and 11c, until feed liquid in head tank 1 all after microwave evaporation is concentrated, closes microwave source 3, vavuum pump 10 and feed pump 2, and vacuum in delivery system, when whole system reaches normal pressure, open discharging pump 13, after concentrated, feed liquid reclaims through exporting 15.
Embodiment 2
As illustrated in fig. 1 and 2, this microwave-vaporising device, comprises head tank 1, dropproducing devices, microwave evaporation device and evaporation water retracting device, dropproducing devices comprises feed pump 2, by-pass valve control and high-pressure nozzle 12, microwave evaporation device comprises magnetron 3, demister 4, thermocouple 5, steam (vapor) outlet 6, evaporator 7, by-pass valve control 11, discharging pump 13, evaporation bed 14, material liquid outlet 15, rotating shaft 16, bearing 17 and sealing ring 18, evaporation water retracting device comprises stram condenser 8, distilled water collecting tank 9 and vavuum pump 10, head tank 1 discharging opening successively with feed pump 2, by-pass valve control is connected with high-pressure nozzle 12 pipeline, high-pressure nozzle 12 is positioned at evaporator 7 inner upper end by pipeline from the insertion of evaporator 7 side, the outside surrounding of evaporator 7 evenly arranges magnetron 3, evaporator 7 installs some thermocouples 5 according to actual conditions, by rotating shaft 16 immediately below evaporator 7 internal high pressure shower nozzle 12, bearing 17 and sealing ring 18 are provided with evaporation bed 14, evaporation bed 14 is adjustable in 0 ° ~ 90 ° by rotating shaft 16, material liquid outlet 15 is provided with bottom evaporator 7, material liquid outlet 15 is connected with two pipelines, a direct connection control valve of pipeline, another root pipeline connects back high-pressure nozzle 12 pipeline by by-pass valve control, and evaporator 7 inner upper is provided with demister 4, evaporator 7 top is provided with steam (vapor) outlet 6, steam (vapor) outlet 6 successively with stram condenser 8, distilled water collecting tank 9 is connected with vavuum pump 10 pipeline.
Wherein be provided with heat-insulation layer between evaporator 7 and magnetron 3; Described high-pressure nozzle 12 adopts the modified and reinforced King of PTFE to process, and it has fabulous temperature tolerance (-200 to+260 DEG C), the not resistance to viscosity of corrosion resistance, ageing resistance, hydrophobic and machinability; Meanwhile, it is that electromagnetic wave transparent material does not absorb microwave substantially, thus ensures the even of vaporization chamber Space Microwave under multimode radiation; Evaporation bed 14 adopts silicon nitride microwave-absorbing ceramic material to make.
As shown in Figure 3, this device carries out evaporation and concentration to Bayer-process seed-separating mother liquor, and its concrete steps of application process are as follows:
Step 1, pressure regulate: be first 0.03Mpa by vavuum pump 10 by the Stress control of microwave evaporation device and evaporation water retracting device;
Step 2, make and drip: joined by 30L Bayer-process seed-separating mother liquor in head tank 1, then Bayer-process seed-separating mother liquor is by feed pump 2 and high-pressure nozzle 12, and the drop making Bayer-process seed-separating mother liquor form particle diameter 3mm enters evaporator 7;
Step 3, masking: droplets fall step 2 obtained forms liquid film to the evaporation bed 14 in evaporator 7, wherein evaporation bed 14 adjusts angle of inclination is 90 °, and evaporation bed 14 adopts silicon nitride microwave-absorbing ceramic material to make;
Step 4, microwave evaporation: while carrying out step 2 and 3, open the magnetron 3 of evaporator 7, adopt the drop in the direct heating evaporation tank 7 of microwave and liquid film, evaporate bed simultaneously and absorb microwave energy, indirect liquid film and whole evaporator 7 obtain steam, and wherein microwave power is 1200W, frequency is 2.45GHz;
Step 5, collection of products: the steam obtained through step 4 is after demister 4, overflowed from evaporator 7 fast by negative pressure mode, enter stram condenser 8 condensation, condensed water reclaims through distilled water collecting tank 9 and obtains 18.8L distilled water, and obtains concentrating spent Bayer process seed precipitation solution.
The wherein application process of material liquid outlet 15: open feed pump 2 in evaporation process, close discharging pump 13, Open valve 11a simultaneously, valve-off 11b and 11c, until feed liquid in head tank 1 all after microwave evaporation is concentrated, closes microwave source 3, vavuum pump 10 and feed pump 2, and vacuum in delivery system, when whole system reaches normal pressure, open discharging pump 13, after concentrated, feed liquid reclaims through exporting 15.
Embodiment 3
As illustrated in fig. 1 and 2, this microwave-vaporising device, comprises head tank 1, dropproducing devices, microwave evaporation device and evaporation water retracting device, dropproducing devices comprises feed pump 2, by-pass valve control and high-pressure nozzle 12, microwave evaporation device comprises magnetron 3, demister 4, thermocouple 5, steam (vapor) outlet 6, evaporator 7, by-pass valve control 11, discharging pump 13, evaporation bed 14, material liquid outlet 15, rotating shaft 16, bearing 17 and sealing ring 18, evaporation water retracting device comprises stram condenser 8, distilled water collecting tank 9 and vavuum pump 10, head tank 1 discharging opening successively with feed pump 2, by-pass valve control is connected with high-pressure nozzle 12 pipeline, high-pressure nozzle 12 is positioned at evaporator 7 inner upper end by pipeline from the insertion of evaporator 7 side, the outside surrounding of evaporator 7 evenly arranges magnetron 3, evaporator 7 installs some thermocouples 5 according to actual conditions, by rotating shaft 16 immediately below evaporator 7 internal high pressure shower nozzle 12, bearing 17 and sealing ring 18 are provided with evaporation bed 14, evaporation bed 14 is adjustable in 0 ° ~ 90 ° by rotating shaft 16, material liquid outlet 15 is provided with bottom evaporator 7, material liquid outlet 15 is connected with two pipelines, a direct connection control valve of pipeline, another root pipeline connects back high-pressure nozzle 12 pipeline by by-pass valve control, and evaporator 7 inner upper is provided with demister 4, evaporator 7 top is provided with steam (vapor) outlet 6, steam (vapor) outlet 6 successively with stram condenser 8, distilled water collecting tank 9 is connected with vavuum pump 10 pipeline.
Wherein be provided with heat-insulation layer between evaporator 7 and magnetron 3; Described high-pressure nozzle 12 adopts the modified and reinforced King of PTFE to process, and it has fabulous temperature tolerance (-200 to+260 DEG C), the not resistance to viscosity of corrosion resistance, ageing resistance, hydrophobic and machinability; Meanwhile, it is that electromagnetic wave transparent material does not absorb microwave substantially, thus ensures the even of vaporization chamber Space Microwave under multimode radiation; Evaporation bed 14 adopts aluminium oxide microwave-absorbing ceramic material to make.
As shown in Figure 3, this device carries out evaporation and concentration to seawater, and its concrete steps of application process are as follows:
Step 1, pressure regulate: be first 0.02Mpa by vavuum pump 10 by the Stress control of microwave evaporation device and evaporation water retracting device;
Step 2, make and drip: joined by 30L seawater in head tank 1, then seawater is by feed pump 2 and high-pressure nozzle 12, and the drop making seawater form particle diameter 2mm enters evaporator 7;
Step 3, masking: droplets fall step 2 obtained forms liquid film to the evaporation bed 14 in evaporator 7, wherein evaporation bed 14 adjusts angle of inclination is 10 °, and evaporation bed 14 adopts aluminium oxide microwave-absorbing ceramic material to make;
Step 4, microwave evaporation: while carrying out step 2 and 3, open the magnetron 3 of evaporator 7, adopt the drop in the direct heating evaporation tank 7 of microwave and liquid film, evaporate bed simultaneously and absorb microwave energy, indirect liquid film and whole evaporator 7 obtain steam, and wherein microwave power is 1200W, frequency is 2.45GHz;
Step 5, collection of products: the steam obtained through step 4, after demister 4, is overflowed fast by negative pressure mode, entered stram condenser 8 condensation from evaporator 7, condensed water reclaims through distilled water collecting tank 9 and obtains 26.7L distilled water, and obtains concentrated seawater.
The wherein application process of material liquid outlet 15: simultaneously open feed pump 2 and discharging pump 13 in evaporation process, and open valve 11a and 11b, valve-off 11c, concentrate bottom evaporator 7 is fallen within through material liquid outlet 15 by evaporation bed 14, after being mixed by the solvent or diluent liquid in pipeline and head tank, again evaporator is entered by high-pressure nozzle 12, after whole feed liquid evaporation to be done, close microwave source 3, vavuum pump 10 and feed pump 2, and vacuum in delivery system, Open valve 11c simultaneously, valve-off 11a and 11b, when whole system reaches normal pressure, open discharging pump 13, after concentrated, feed liquid reclaims through exporting 15.
Below by reference to the accompanying drawings the specific embodiment of the present invention is explained in detail, but the present invention is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from present inventive concept.
Claims (6)
1. microwave-vaporising device, it is characterized in that: comprise head tank (1), dropproducing devices, microwave evaporation device and evaporation water retracting device, dropproducing devices comprises feed pump (2), by-pass valve control (11) and high-pressure nozzle (12), microwave evaporation device comprises magnetron (3), demister (4), thermocouple (5), steam (vapor) outlet (6), evaporator (7), by-pass valve control, discharging pump (13), evaporation bed (14), material liquid outlet (15), rotating shaft (16), bearing (17) and sealing ring (18), evaporation water retracting device comprises stram condenser (8), distilled water collecting tank (9) and vavuum pump (10), head tank (1) discharging opening successively with feed pump (2), by-pass valve control is connected with high-pressure nozzle (12) pipeline, high-pressure nozzle (12) is positioned at evaporator (7) inner upper end by pipeline from the insertion of evaporator (7) side, evaporator (7) outside surrounding evenly arranges magnetron (3), evaporator (7) installs some thermocouples (5) according to actual conditions, by rotating shaft (16) immediately below evaporator (7) internal high pressure shower nozzle (12), bearing (17) and sealing ring (18) are provided with evaporation bed (14), evaporation bed (14) is adjustable in 0 ° ~ 90 ° by rotating shaft (16), evaporator (7) bottom is provided with material liquid outlet (15), material liquid outlet (15) is connected with two pipelines, a direct connection control valve of pipeline, another root pipeline connects back high-pressure nozzle (12) pipeline by by-pass valve control, evaporator (7) inner upper is provided with demister (4), evaporator (7) top is provided with steam (vapor) outlet (6), steam (vapor) outlet (6) successively with stram condenser (8), distilled water collecting tank (9) is connected with vavuum pump (10) pipeline.
2. microwave-vaporising device according to claim 1, is characterized in that: be provided with heat-insulation layer between described evaporator (7) and magnetron (3).
3. microwave-vaporising device according to claim 1, is characterized in that: described high-pressure nozzle (12) adopts the modified and reinforced King of PTFE to process.
4. the application process of microwave-vaporising device according to claim 1, is characterized in that: the employing of described evaporation bed (14) is made up of carborundum, silicon nitride, aluminium oxide, boron sikicate aluminum, barium titanate, clay or carbon black microwave-absorbing ceramic material.
5. an application for microwave-vaporising device as arbitrarily described in Claims 1-4, is characterized in that: this device may be used for the mother liquor that evaporation of seawater recycles and obtain after Bayer-process seed-separating mother liquor decomposition and carries out evaporation and concentration.
6. an application process for microwave-vaporising device as claimed in claim 5, is characterized in that concrete steps are as follows:
Step 1, pressure regulate: be first 0.01 ~ 0.03Mpa by vavuum pump (10) by the Stress control of microwave evaporation device and evaporation water retracting device;
Step 2, make drip: seawater or Bayer-process seed-separating mother liquor are joined in head tank (1), then seawater or Bayer-process seed-separating mother liquor are by feed pump (2) and high-pressure nozzle (12), and the drop making seawater or Bayer-process seed-separating mother liquor form particle diameter 1 ~ 3mm enters evaporator (7);
Step 3, masking: droplets fall step (2) obtained forms liquid film to the evaporation bed (14) in evaporator (7);
Step 4, microwave evaporation: while carrying out step (2) and (3), open the magnetron (3) of evaporator (7), adopt the drop in the direct heating evaporation tank (7) of microwave and liquid film, evaporate bed simultaneously and absorb microwave energy, indirect liquid film and whole evaporator (7) obtain steam;
Step 5, collection of products: the steam obtained through step 4 is after demister (4), overflowed from evaporator (7) fast by negative pressure mode, enter stram condenser (8) condensation, condensed water reclaims through distilled water collecting tank (9) and obtains distilled water, and obtains concentrated seawater or concentrating spent Bayer process seed precipitation solution.
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| CN201510211058.5A CN104857734B (en) | 2015-04-29 | 2015-04-29 | A kind of microwave evaporation device, using and application process |
| US15/515,460 US10632396B2 (en) | 2015-04-29 | 2016-04-19 | Microwave flash evaporation process and apparatus and use thereof |
| PCT/CN2016/079611 WO2016173424A1 (en) | 2015-04-29 | 2016-04-19 | Microwave flash evaporation process, apparatus and application |
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| WO2016173424A1 (en) * | 2015-04-29 | 2016-11-03 | 昆明理工大学 | Microwave flash evaporation process, apparatus and application |
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| CN110559671A (en) * | 2019-09-18 | 2019-12-13 | 昆明理工大学 | Microwave heating fluidization evaporation concentration device and using method thereof |
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