CN201470370U - Gas-liquid contact reaction device for mass transfer enhancement - Google Patents
Gas-liquid contact reaction device for mass transfer enhancement Download PDFInfo
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- CN201470370U CN201470370U CN2009203073494U CN200920307349U CN201470370U CN 201470370 U CN201470370 U CN 201470370U CN 2009203073494 U CN2009203073494 U CN 2009203073494U CN 200920307349 U CN200920307349 U CN 200920307349U CN 201470370 U CN201470370 U CN 201470370U
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Abstract
The utility model discloses a gas-liquid contact reaction device for mass transfer enhancement, and aims to provide a gas-liquid contact reaction device capable of increasing the gas-liquid mass transfer rate, improving the gas-liquid reaction rate and reducing the equipment investment and operation cost of a gas-liquid reaction process. An ultrasonic generator capable of producing high frequency vibration is fixed at the top of a contact reactor, and a reflecting plate for reflecting sound waves is fixed at the bottom thereof; and a low voltage power source, a signal generator, a signal amplifier and the ultrasonic generator are connected in sequence to form an ultrasonic field with gradually reduced amplitudes in the contact reactor, thereby controlling the combination between bubbles, increasing the residence time of the bubbles, and facilitating the mass transfer enhancement between gas and liquid. The device can restrain liquid phase back-mixing produced by bubble combination and improve the gas-liquid reaction rate; and the non-contact type device with simple structure can be widely applied to all bubbly flow gas-liquid reaction fields.
Description
Technical field
The utility model relates to a kind of gas-liquid contact reaction device of mass transfer enhancement.
Background technology
Extensive capital equipment or flow process adopt gas liquid reaction production chemical product or intermediate product in the chemical industry, wherein the bubble flow gas liquid reaction is widely used in the production fluid product in chemical industry, reclaim the utility in the mist, remove harmful components with Purge gas etc., as the Residual oil hydrocracking of in bubble tower, carrying out, desulfurization, the wax hydrofining decolouring, GAS ABSORPTION, waste gas and wastewater treatment, the air oxidation of liquid state organics, chemical processes such as low molecular weight olefin polymerization and Fischer-Tropsch are synthetic, nearly twenty or thirty is over year, because the application of homogeneous phase complex catalyst, gas liquid reaction more and more shows its importance.The bubble flow gas liquid reaction has also obtained to use widely in the environmental protection field not only at chemical field, carries out drinking water treatment etc. as adopting the air supporting method that sewage is handled with ozone.Adopt to force air bubbling sulfur removal technology in addition in the station boiler, the fermentation of food and pharmaceuticals industry Chinese traditional medicine etc. in the bubbling stirred tank all is the gas liquid reaction under a kind of bubble flow regime in the food industry.
Bubble tower and similar air-flotation type reactor are a large amount of chemical industry equipments that carry out the bubble flow gas liquid reaction that use in the chemical industry, and bubbling column reactor is simple in structure, cost is low, easy to control, easy-maintaining, anticorrosion problem easily solve, and does not also have difficulty when being used for high pressure.But the conversion rate of gas liquid reaction is lower in the similar gas-liquid reactor such as bubble tower, and resource utilization is low, and energy waste is comparatively serious.Aerobic sewage treatment technology activated sludge reactor aeration tank (being similar to bubble tower) with extensive employing is an example, and the aeration aerating power consumption generally accounts for 60%～70% of total output consumption, and capacity usage ratio has only a few percent.Though built many large-scale water treatment plants, had to shelve owing to can not consuming electric power.Utilize for another example in the water treatment procedure that ozone gas carries out, the solubility of ozone gas in water is not high, and the ozone concentration that ozone generator produced is lower, usually less than 10% (volumetric concentration), be difficult to accomplish the efficient mass transfer of ozone in water, reach than dissolved ozone concentration in the higher water, usually run in the engineering practice ozone and water haptoreaction inadequately fully, problem such as the ozone concentration that dissolves in not high, the water of the utilization ratio of ozone gas is on the low side, have a strong impact on promoting the use of of restriction Ozone Water treatment technology.
Existing all kinds of haptoreaction devices substantially all are the forms of continuing to use the chemical industry gas-liquid reactor at present, as bubble tower, packed tower, ejector etc.Not high in the said apparatus owing to the solubility of gas in liquid, be difficult to accomplish the efficient mass transfer of gas in liquid, and reach in the liquid than higher gas concentration, usually run in the engineering practice gas and liquid haptoreaction inadequately fully, problem such as dissolved gases concentration is on the low side in not high, the water of the utilization ratio of gas, thereby make resource utilization, production cost is higher, and causes severe energy waste, also has influence on promoting the use of of relevant art.
People study the way of having explored a lot of reinforcement gas-liquid mixed contacts at present, as increase pressure in the haptoreaction container, adopt turbine-type mixer, improve the expulsion pressure of jet pipe-line mixer, utilize mechanical impeller shear agitation etc. in the bubble tower, these continue to use the means of reinforcement gas liquid reaction commonly used in the chemical field, the method that belongs to mechanical enhancer, energy consumption and expense are bigger, be difficult in the higher gas liquid reaction technology of original operating cost, use on a large scale, also have some to adopt external force field to strengthen the way that the gas-liquid contact mixes in addition, as electric field-enhanced, low-frequency sound wave exciting etc., all be to wish in reactor, to produce more bubble, contact area between the increase gas-liquid.Although adopt said method can produce a large amount of minute bubbles, but because the interaction between bubble, the number of bubbles increase makes between bubble and to merge the phenomenon occurrence probability and increase greatly, and minute bubbles are merged into air pocket, not only causing contacting between gas-liquid area reduces, and because the buoyancy that air pocket is subjected to is bigger, its time of staying in reactor also can shorten, thereby can cause that mass transfer rate descends, last air pocket is constantly overflowed from liquid and is caused serious backmixing of liquid phase, and the liquid reactions substrate concentration is generally reduced, and production concentration generally rises, and trending towards the liquid phase discharge state, this causes gas liquid reaction speed obviously to descend.
The utility model content
The utility model is in order to overcome weak point of the prior art, provide a kind of can improve gas to the mass-transfer efficiency of liquid, improve gas liquid reaction speed, reduce the equipment investment in the gas liquid reaction and the gas-liquid contact reaction device of operating cost.
The utility model is achieved through the following technical solutions:
A kind of gas-liquid contact reaction device of mass transfer enhancement, comprise contact reactor, described contact reactor is provided with liquid-inlet, liquid outlet, gas feed, tail gas outlet, it is characterized in that, the top of described contact reactor is fixed with the supersonic generator that can produce dither, the bottom of contact reactor is fixed with the reflecting plate of reflective sound wave, low-tension supply, signal generator, signal amplifier, described supersonic generator connect successively, in contact reactor, form the ultrasonic field that amplitude reduces gradually between described supersonic generator and the reflecting plate.
Described contact reactor is any in bubble tower, packed tower, jet tower, bubbling jar, the spray can.
Described supersonic generator is made up of piezoelectric ceramics, anodal copper coin electrode, negative pole copper coin electrode, metal shell, described anodal copper coin electrode is connected with the positive pole-face of piezoelectric ceramics, negative pole copper coin electrode is connected with the negative pole face of piezoelectric ceramics, described anodal copper coin electrode is connected with signal generator respectively with negative pole copper coin electrode, described piezoelectric ceramics, anodal copper coin electrode, negative pole copper coin electrode place in the metal shell, and the positive pole of piezoelectric ceramics faces down towards contact reactor inside.
The utlity model has following technique effect:
The utility model gas-liquid contact reaction device can produce the supersonic generator of dither at the contact reactor top, cooperate the fixing reflecting plate in contact reactor bottom, make and form the ultrasonic field that amplitude reduces gradually from top to bottom in the contact reactor, can improve the mass-transfer efficiency of gas by a relatively large margin to liquid, improve gas liquid reaction speed, reduce the volume and the manufacturing cost of haptoreaction device, reduce equipment investment and operating cost in the gas liquid reaction.Haptoreaction apparatus structure of the present utility model is simple, can manufacture or realize the technological transformation of existing device easily, can relatively be widely applied to all bubble flow gas liquid reaction fields, as the Residual oil hydrocracking of carrying out in the bubble tower, desulfurization, the wax hydrofining decolouring, GAS ABSORPTION, waste gas and wastewater treatment, the air oxidation of liquid state organics, chemical processes such as low molecular weight olefin polymerization and Fischer-Tropsch are synthetic, drinking water disinfection/sterilization/kill algae, swimming-pool water is handled, make high-concentration ozone water, water treatment field such as recirculated cooling water processing, pressure air bubbling sulfur removal technology in the station boiler, in the food industry in the bubbling stirred tank the multiple places such as fermentation of food and pharmaceuticals industry Chinese traditional medicine.
The method that strengthens mass transfer with traditional machinery is compared, and gas-liquid contact reaction device of the present utility model has following advantage:
1. contactless: promptly supersonic generator does not directly contact with reaction working medium, and not reacted working medium influences, and applicability is extensive.
2. can control the merging between bubble, thereby make bubble in uphill process, the contact area can not reduce between gas-liquid, increases the time of staying of bubble simultaneously, helps the mass transfer enhancement between gas-liquid.
3. can suppress the backmixing of liquid phase that rising bubble is overflowed and caused from liquid level, thereby improve the concentration of product district product, improve the primary first-order equation utilization rate of vapor-phase reactant, improve gas liquid reaction speed.
Description of drawings
Fig. 1 is the schematic diagram of the gas-liquid contact reaction device of the utility model mass transfer enhancement.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in detail.
Fig. 1 is the schematic diagram of the gas-liquid contact reaction device of the utility model mass transfer enhancement, comprise contact reactor 1, contact reactor 1 is provided with liquid-inlet 2, liquid outlet 4, gas feed 3, tail gas outlet 5, be fixed with the supersonic generator 6 that can produce dither at the top of contact reactor 1, the bottom of contact reactor is fixed with the reflecting plate 10 of reflective sound wave, low-tension supply 9, signal generator 8, signal amplifier 7, supersonic generator 6 connects successively, in contact reactor, form the ultrasonic field that amplitude reduces gradually between described supersonic generator and the reflecting plate.Wherein, described supersonic generator is made up of piezoelectric ceramics, anodal copper coin electrode, negative pole copper coin electrode, metal shell, described anodal copper coin electrode is connected with the positive pole-face of piezoelectric ceramics, negative pole copper coin electrode is connected with the negative pole face of piezoelectric ceramics, described anodal copper coin electrode is connected with signal generator respectively with negative pole copper coin electrode, described piezoelectric ceramics, anodal copper coin electrode, negative pole copper coin electrode place in the metal shell, and the positive pole of piezoelectric ceramics faces down towards contact reactor inside.
Contact reactor is any in the bubble tower, packed tower, jet tower, bubbling jar, spray can, air-flotation type reactor of common form.
The liquid that participates in reaction is flowed out by liquid outlet 4 from the contact reactor 1 of liquid-inlet 2 inflow gas and liquid.Gas enters in the contact reactor 1 by gas feed, and gas in the liquid and the tail gas behind the liquid reactions are discharged through tail gas outlet 5.Open low-tension supply, the signal that signal generator produces is delivered to supersonic generator through behind the signal amplifier, the dither that supersonic generator produces imports contact reactor inside into, and the reflex by reflecting plate forms the ultrasonic field that amplitude from top to bottom reduces gradually in contact reactor.Under the effect of such ultrasonic field, dissolved gases can be separated out from liquid in the inactive liquid of reactor top, form minute bubbles and move downward air pocket of gathering formation, air pocket is grown up and to a cut off diameter unexpected sinking campaign is taken place, and arrives a certain position, bottom in a short period of time and keeps stable.Cut off diameter that bubble is grown up size is relevant with ultrasonic frequency, and as when supersonic frequency is 26KHz, the cut off diameter of bubble is about 2mm, and when supersonic frequency during at the MHz order of magnitude, the bubble cut off diameter is generally the micron number magnitude.Be that the bubble cut off diameter reduces along with the increase of frequency.Bubble takes place and unexpected sinkage recurs with some cycles, has assembled the identical bubble of a large amount of sizes at lower position.Big or small herein identical bubble interacts, and a plurality of bubbles keep stable state, do not merge.Have a critical gap between bubble, the bubble spacing then attracts each other greater than this critical gap, then repels mutually near this critical gap.As external disturbance appears, and make the bubble spacing less than this critical gap, then bubble merges, and the bubble after the merging breaks under the sound wave effect.Rising bubble for the cut off diameter size, because the effect of ultrasonic field, can not merge phenomenon each other, rising bubble greater than cut off diameter, break under the sound wave effect and do not form bigger bubble, can be merged into diameter less than the minute bubbles of cut off diameter is that the bubble of cut off diameter exists.The existence of ultrasonic field makes the alternate contact area of gas-liquid can not reduce owing to bubble merges, and helps the carrying out of mass transport process.And sound field to act on the action direction of the Bjerknes power on the bubble identical with gravity direction, also can increase the time of staying of bubble, help the carrying out of mass transport process.Device of the present utility model is compared with the situation of not strengthening ultrasonic field, and the mass transfer effect of gas in liquid all is improved largely, and overall mass transfer coefficient all can improve more than 100%.
Although the disclosed gas-liquid contact reaction device that relates to a kind of mass transfer enhancement has been carried out special description with reference to embodiment, embodiment described above is illustrative and not restrictive, under the situation that does not break away from spirit and scope of the present utility model, all variations and modification are all within scope of the present utility model.
Claims (3)
1. the gas-liquid contact reaction device of a mass transfer enhancement, comprise contact reactor, described contact reactor is provided with liquid-inlet, liquid outlet, gas feed, tail gas outlet, it is characterized in that, the top of described contact reactor is fixed with the supersonic generator that can produce dither, the bottom of contact reactor is fixed with the reflecting plate of reflective sound wave, low-tension supply, signal generator, signal amplifier, described supersonic generator connect successively, in contact reactor, form the ultrasonic field that amplitude reduces gradually between described supersonic generator and the reflecting plate.
2. the gas-liquid contact reaction device of mass transfer enhancement according to claim 1 is characterized in that, described contact reactor is any in bubble tower, packed tower, jet tower, bubbling jar, spray can, the air-flotation type reactor.
3. the gas-liquid contact reaction device of mass transfer enhancement according to claim 1, it is characterized in that, described supersonic generator is by piezoelectric ceramics, anodal copper coin electrode, negative pole copper coin electrode, metal shell is formed, described anodal copper coin electrode is connected with the positive pole-face of piezoelectric ceramics, negative pole copper coin electrode is connected with the negative pole face of piezoelectric ceramics, described anodal copper coin electrode is connected with signal generator respectively with negative pole copper coin electrode, described piezoelectric ceramics, anodal copper coin electrode, negative pole copper coin electrode places in the metal shell, and the positive pole of piezoelectric ceramics faces down towards contact reactor inside.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009203073494U CN201470370U (en) | 2009-08-04 | 2009-08-04 | Gas-liquid contact reaction device for mass transfer enhancement |
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| CN2009203073494U CN201470370U (en) | 2009-08-04 | 2009-08-04 | Gas-liquid contact reaction device for mass transfer enhancement |
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| CN201470370U true CN201470370U (en) | 2010-05-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101618306B (en) * | 2009-08-04 | 2012-05-30 | 天津商业大学 | Method for strengthening gas-liquid contact reaction mass transfer and gas-liquid contact reaction device |
| CN104162395A (en) * | 2014-03-21 | 2014-11-26 | 中国科学院大连化学物理研究所 | Method for enhancing gas-liquid process in micro-reactor |
| CN106111025A (en) * | 2016-08-09 | 2016-11-16 | 东南大学 | New bubble tower reactor that a kind of nozzle is combined with multilamellar Perforated plate distributor and method |
-
2009
- 2009-08-04 CN CN2009203073494U patent/CN201470370U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101618306B (en) * | 2009-08-04 | 2012-05-30 | 天津商业大学 | Method for strengthening gas-liquid contact reaction mass transfer and gas-liquid contact reaction device |
| CN104162395A (en) * | 2014-03-21 | 2014-11-26 | 中国科学院大连化学物理研究所 | Method for enhancing gas-liquid process in micro-reactor |
| CN106111025A (en) * | 2016-08-09 | 2016-11-16 | 东南大学 | New bubble tower reactor that a kind of nozzle is combined with multilamellar Perforated plate distributor and method |
| CN106111025B (en) * | 2016-08-09 | 2019-03-05 | 东南大学 | The bubbling column reactor and method of a kind of nozzle in conjunction with multilayer Perforated plate distributor |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100519 Effective date of abandoning: 20090804 |