CN102895786A - Energy-saving evaporator - Google Patents
Energy-saving evaporator Download PDFInfo
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- CN102895786A CN102895786A CN2011102111749A CN201110211174A CN102895786A CN 102895786 A CN102895786 A CN 102895786A CN 2011102111749 A CN2011102111749 A CN 2011102111749A CN 201110211174 A CN201110211174 A CN 201110211174A CN 102895786 A CN102895786 A CN 102895786A
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Abstract
The invention relates to an energy-saving evaporator. Specifically, each heating tube is provided with an inlet end fixed fixation screw inside, and the fixation screws mainly make liquid flows inside the tubes into helical flows, and simultanesouly have certain effects of convective heat transfer enhancement and automatic cleaning for scale prevention. Fluidization balls with a volume concentration of (0.5-5)% are added an evaporation circulating solution to further strengthen automatic cleaning for scale prevention. A steam jet ring starting reverse natural circulation is designed below a central circulation tube. The structure of the central circulation tube and a horn circulation tube arranged above the central circulation tube can strengthen the natural circulation driving force of the evaporator, can completely replace a high energy-consuming forced circulation pump, and also meets the flow rate requirement of fluidization ball natural circulation flow. A curve section design between a lower tube plate and a curve bottom cone is convenient for smooth natural circulation flow of the fluidization balls at the place. The energy-saving evaporator can realize automatic cleaning for scale prevention under natural circulation conditions, can meet the requirements of long-term efficient continuous production, and has substantial energy saving and yield increasing benefits.
Description
Technical field
A kind of energy-saving vaporising device of the present invention relates to interior automatic cleaning, the heat conduction reinforced and heat transfer enhancement reinforcement of heating tube of tubulation heating fumigators.It mainly is applicable to the natural-circulation evaporator of easy growth dirt in the heating tube.
Background technology
Existing Natural Circulation tubulation heated type vaporising device almost can't be used for mother liquid evaporation can growth crystallization salt crust and other dirt vaporising device in heating tube.Because the Natural Circulation flow velocity is low, meeting Fast Growth crystallization salt crust and other dirt in the heating tube, efficient is low, energy consumption is high, needs the frequent clean of short period cleaning.For example the heat transfer coefficient of an effect evaporator drops to 1628w/m2 ℃ by 2432w/m2 ℃ in 7 hours, has reduced by 33% (discuss point by point civilian evaporator and change reverse circulating necessity into, sea lake salt and chemical industry, 1988, n6, p38-42).Therefore, most Natural Circulation vaporising devices have to adopt circulating pump to come forced circulation, to reach the purpose that prolongs the cleaning frequency, reduces the cleaning during shutdown number of times.But not only appliance arrangement takes highly, the more important thing is that the forced circulation pump energy consumption is too high.For example, the circulating pump ACP11-900 type 160Kw (sea lake salt and chemical industry, 1998, v27, n6, p24-26) of certain salt evaporimeter, annual power consumption more than the 600 ten thousand degree electricity of wanting of a cover five effect evaporators.
Vaporizer technology is cleaned in fluidization automatically, early such as patent EP262725 and Chinese patent ZL91106682.9 etc., newer bibliographical information as, Chinese medicine climacteric-syndrome-relieving tablet leaching liquid gas-liquid-solid three phase flow Natural Circulation evaporation and concentration, Journal of Chemical Industry and Engineering, 2003,54 (7): 1029-1131).But the introducing of inert gas has a strong impact on the new problem of the multi-effect evaporating device energy consumption promotion of indirect steam recycling.
Summary of the invention
The present invention proposes a kind of energy-saving vaporising device, not only can make vaporising device realize effectively online, continuous automatic cleaning, and can save for the forced-circulation evaporation device forced circulation pump of high energy consumption, and do not affect the inert gas problem of indirect steam recycling, can be applied to efficiently multi-effect evaporating device.Be applicable to the automatic cleaning of evaporimeter, energy-conservation and volume increase.
The technical scheme of wood invention is: a kind of energy-saving vaporising device, critical piece have vaporization chamber, heating clamber, fixedly spiral, heating tube, fluidisation ball, central circulating tube, bend base cone, bend addendum cone, loudspeaker circulation pipe, annular circulation road, steam spray ring.
A fixedly spiral is set in the every heating tube.Fixedly an end of spiral is axially fixed on the mouth of pipe frame of heating tube arrival end by hanging steel wire, can not rotate, but circumferentially can turn pendulum, radially can vibrate.Fixedly the effect of spiral is duct fluid flow and fluidisation ball guiding are become spiral flow, not only self having certain convection heat transfer' heat-transfer by convection strengthens and automatically cleaning action, and make the fluidisation ball under the effect of centrifugal force, be enriched to the heating tube inwall, and with the centrifugal force of self schmutzband of exerting pressure, can realize efficiently antiscale and automatically clean the dirt that comprises hard scale.Fixedly spiral has two kinds of structures, and a kind of is steel wire spiral, and another kind is the twisted strip spiral.The steel wire of steel wire spiral or mould the bag gauge of wire in 1.0～5.0mm scope, the diametric clearance between the external diameter of steel wire spiral and the heating tube internal diameter is greater than 2 times of the fluidisation bulb diameter, and the pitch of steel wire spiral is (0.40～1.20) times of heating tube internal diameter.The twisted strip width of twisted strip spiral and the diametric clearance between the heating tube internal diameter be greater than 2 times of the fluidisation bulb diameter, the twisted strip pitch of twisted strip spiral be the heating tube internal diameter (4～9) doubly.
The Main Function of fluidisation ball is automatic cleaning, secondly is that convection heat transfer' heat-transfer by convection is strengthened.The diameter of fluidisation ball is in 1.0～4.0mm scope.The volumetric concentration of fluidisation ball in circulating fluid is in 0.5%～5.0% scope.It is the material manufacturing of inertia that the fluidisation ball is selected the evaporation feed liquid, such as stainless steel, non-ferrous metal, glass, plastics, pottery etc.
The below of central circulating tube is provided with the steam spray ring.The cross-sectional area of central circulating tube is 0.7～1.4 times of all heating tube flow area summations.Bend base cone and the bend addendum cone of central circulating tube below, and consist of circulation bend take the bend streamline as its runner center line between the lower perforated plate, central circulating tube bottom, the cross-sectional sizes of circulation bend designs by approximate uniform flow.The top of central circulating tube arranges the loudspeaker circulation pipe, and cross section of fluid channel is progressively enlarged, and overheated circulating fluid is vaporized more fully in uphill process, increases heat transfer enhancement with this, can reduce again the outlet kinetic energy rejection that the rear volumetric expansion of vaporization causes.But the loudspeaker circulation pipe can not too enlarge, take the fluidisation ball can smooth and easy outflow as degree; The cone angle beta of loudspeaker circulation pipe is 3 °～30 ° scope.The port of export of loudspeaker circulation pipe is lower than liquid level 50～300mm.Also can be designed with the eddy flow swash plate in the loudspeaker circulation pipe, its effect is that the circulating fluid that will rise is directed to spiral flow, makes the high level boiling liquid of nearly liquid level high-rise circulation occur, and its benefit is; Be conducive to the fluidisation ball and export to annular circulation road; Be conducive to lower outside circulation district (being that annular circulation road is high-rise) steam bubble content, be conducive to improve the steam bubble content of interior circulating-area, thereby increase the heat transfer enhancement based on density contrast.The scope of the oblique angle α of eddy flow swash plate is 30 °～60 °.Area of section is pressed greater than the principle design of the circulation gross area of heating tube in the annular circulation road that forms between loudspeaker circulation pipe and the vaporization chamber, its width.The gripper shoe of tiltedly leading in the annular circulation road is not on vertical plane, but with vertical plane 10 °～30 ° inclination is arranged, and all be to tilt to same direction at circumferencial direction, its purpose is not only as the loudspeaker circulation pipe in the essential support of evaporation indoor location, and to make the certain circulation of formation in the annular circulation road, purpose is to improve the uniformity that the fluidisation ball enters each heating tube.In 1000～2000mm scope, the evaporator designs value that vaporization chamber pressure is healed high should heal greatly the vaporization chamber liquid level to the degree of depth of heating clamber upper perforated plate.
During driving, the steam by heating clamber is heated to the feed liquid in the evaporimeter near boiling point first, opens the steam spray ring with the direct spirt central circulating tube of steam bottom again.Because central circulating tube and loudspeaker circulation pipe contain a large amount of steam bubbles, and do not have steam bubble in heating tube and the annular circulation road, both sides form the heat transfer enhancement of larger differential static pressure, cause the reverse Natural Circulation of high flow velocities.After the reverse Natural Circulation of high flow velocities was stable, uperize that just can the steam off spray ring entered the reverse Natural Circulation of normal operation.
Description of drawings
Fig. 1 is the schematic overview of a kind of energy-saving vaporising device of the present invention.
Fig. 2 is the organization plan figure of steel wire spiral in a kind of energy-saving vaporising device heating tube of wood invention.
Fig. 3 is the organization plan figure of twisted strip spiral in a kind of energy-saving vaporising device heating tube of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing 1, Fig. 2, Fig. 3, the present invention is described in further detail.
Among the figure 1 tiltedly leads the fixedly interior 16 eddy flow swash plates of spiral 4 heating tubes 5 lower perforated plates 6 bend streamlines 7 bend base cones 8 steam spray rings 9 bend addendum cones 10 fluidisation balls 11 central circulating tubes 12 heating steam pipes 13 annular circulation roads 14 loudspeaker circulation pipes, 15 discharge nozzles 17 high-rise circulation 18 liquid levels 19 vaporization chambers 20 demisters 21 steel wire spirals 22 twisted strip spirals 23 suspension steel wires 24 mouth of pipe framves 25 feed pipes of gripper shoe 2 heating clambers 3
A kind of energy-saving vaporising device, critical piece have vaporization chamber 19, heating clamber 2, fixedly spiral 3, heating tube 4, fluidisation ball 10, central circulating tube 11, bend base cone 7, bend addendum cone 9, loudspeaker circulation pipe 14, annular circulation road 13, steam spray ring 8.
Every heating tube 4 is interior to arrange a fixedly spiral 3.Fixedly an end of spiral 3 is axially fixed on the mouth of pipe frame 24 of heating tube 4 arrival ends by hanging steel wire 23, can not rotate, but circumferentially can turn pendulum, radially can vibrate.Fixedly the effect of spiral 3 is duct fluid flow and fluidisation ball 10 guiding are become spiral flow, not only self having certain convection heat transfer' heat-transfer by convection strengthens and automatically cleaning action, and make fluidisation ball 10 under the effect of centrifugal force, be enriched to heating tube 4 inwalls, and with the centrifugal force of self schmutzband of exerting pressure, can realize efficiently antiscale and automatically clean the dirt that comprises hard scale.Fixedly spiral 3 has two kinds of structures, and a kind of is steel wire spiral 21, and another kind is twisted strip spiral 22.The steel wire of steel wire spiral 21 (or moulding Baogang's silk) diameter is in 1.0～5.0mm scope, diametric clearance between the external diameter of steel wire spiral 21 and heating tube 4 internal diameters is greater than 2 times of fluidisation ball 10 diameters, the pitch of steel wire spiral 21 be heating tube 4 internal diameters (0.40～1.20) doubly.Diametric clearance between the twisted strip width of twisted strip spiral 22 and heating tube 4 internal diameters is greater than 2 times of fluidisation ball 10 diameters, the twisted strip pitch of twisted strip spiral 22 be heating tube 4 internal diameters (4～9) doubly.
The Main Function of fluidisation ball 10 is automatic cleanings, secondly is that convection heat transfer' heat-transfer by convection is strengthened.The diameter of fluidisation ball 10 is in 1.0～4.0mm scope.The volumetric concentration of fluidisation ball 10 in circulating fluid is in 0.5%～5.0% scope.It is the material manufacturing of inertia that fluidisation ball 10 is selected the evaporation feed liquid, such as stainless steel, non-ferrous metal, glass, plastics, pottery etc.
The below of central circulating tube 11 is provided with steam spray ring 8.The cross-sectional area of central circulating tube 11 is 0.7～1.4 times of all heating tube 4 flow area summations.The bend base cone 7 of central circulating tube 11 belows and bend addendum cone 9, and consist of circulation bend take bend streamline 6 as its center line between the lower perforated plate 5, central circulating tube 11 bottoms, the cross-sectional sizes of circulation bend designs for optimization aim by the almost constant speed is mobile.The top of central circulating tube 11 arranges loudspeaker circulation pipe 14, so that cross section of fluid channel progressively enlarges, overheated circulating fluid is vaporized more fully in uphill process, increases heat transfer enhancement with this, can reduce again the outlet kinetic energy rejection that the rear volumetric expansion of vaporization causes.But loudspeaker circulation pipe 14 can not too enlarge, take fluidisation ball 10 can smooth and easy outflow as degree; By the cone angle beta of the loudspeaker circulation pipe 14 of this design scope at 3 °～30 °.The port of export of loudspeaker circulation pipe 14 is lower than liquid level 50～300mm.Loudspeaker circulation pipe 14 is interior can also to be designed with eddy flow swash plate 16, and its effect is that the circulating fluid that will rise is directed to spiral flow, makes the high level boiling liquid of nearly liquid level high-rise circulation 17 occur, and it is in well; Be conducive to fluidisation ball 10 and export to annular circulation road; Be conducive to lower outside circulation district (being that annular circulation road is high-rise) steam bubble content, be conducive to improve the steam bubble content of interior circulating-area, thereby increase the heat transfer enhancement based on density contrast.The scope of the oblique angle α of eddy flow swash plate 16 is 30 °～60 °.Area of section is pressed greater than the principle design of the circulation gross area of heating tube 4 in the annular circulation road 13 that forms between loudspeaker circulation pipe 14 and the vaporization chamber 19, its width.The gripper shoe 1 of tiltedly leading in the annular circulation road 13 is not on vertical plane, but with vertical plane 10 °～30 ° inclination is arranged, and all be to tilt to same direction at circumferencial direction, its purpose is not only as loudspeaker circulation pipe 14 in the essential support of vaporization chamber 19 interior installations, and to make the certain circulation of annular circulation road 13 interior formation, purpose is to improve the uniformity that fluidisation ball 10 enters each heating tube 4.In 1000～2000mm scope, the vaporization chamber 19 pressure high value that heals should heal greatly vaporization chamber 19 liquid levels 18 to the degree of depth of heating clamber 2 upper perforated plates.
During driving, the steam by heating clamber 4 is heated to the feed liquid in the evaporimeter near boiling point first, opens steam spray ring 8 with the direct spirt central circulating tube of steam 11 bottoms again.Because central circulating tube 11 and loudspeaker circulation pipe 14 contain a large amount of steam bubbles, and also do not have steam bubble in heating tube 4 and the annular circulation road 13, both sides form the heat transfer enhancement of larger differential static pressure, form the reverse Natural Circulation of high flow velocities.After stable, uperize that just can steam off spray ring 8 enters the reverse Natural Circulation of normal operation.
Claims (5)
1. energy-saving vaporising device, critical piece has vaporization chamber (19), heating clamber (2), fixing spiral (3), heating tube (4), fluidisation ball (10), central circulating tube (11), bend base cone (7), bend addendum cone (9), loudspeaker circulation pipe (14), annular circulation road (13), steam spray ring (8), it is characterized by: a fixedly spiral (3) is set in the every heating tube (4), be axially fixed on the mouth of pipe frame (24) of heating tube (4) arrival end, circumferentially can not rotate; Fixedly the structure of spiral (3) is steel wire spiral (21) or twisted strip spiral (22); The diameter of fluidisation ball (10) is in 1.0～4.0mm scope, and the volumetric concentration in circulation fluid is in 0.5%～5.0% scope; The below of central circulating tube (11) is provided with steam spray ring (8); The cross-sectional area of central circulating tube (11) is 0.7～1.4 times of all heating tubes (4) flow area summation: the top of central circulating tube (11) arranges loudspeaker circulation pipe (14), and its cone angle beta is 3 °～30 ° scope.
2. according to claim 1 a kind of energy-saving vaporising device, it is characterized in that: as the fixing steel wire of the steel wire spiral (21) of spiral (3) (or moulding Baogang's silk) diameter in 1.0～5.0mm scope, diametric clearance between the external diameter of steel wire spiral (21) and heating tube (4) internal diameter is greater than 2 times of fluidisation ball (10) diameter, the pitch of steel wire spiral (21) be heating tube (4) internal diameter (0.40～1.20) doubly.
3. according to claim 1 a kind of energy-saving vaporising device, it is characterized in that: as greater than fluidisation ball (10) diameter 2 times of the twisted strip width of the fixing twisted strip spiral (22) of spiral (3) and the diametric clearance between heating tube (4) internal diameter, the twisted strip pitch of twisted strip spiral (22) be heating tube (4) internal diameter (4～9) doubly.
4. according to claim 1 a kind of energy-saving vaporising device, it is characterized in that: be designed with eddy flow swash plate (16) in the loudspeaker circulation pipe (14), the scope of eddy flow swash plate (6) oblique angle α is 30 °～60 °.
5. according to claim 1 a kind of energy-saving vaporising device, it is characterized in that: the gripper shoe (1) of tiltedly leading in the annular circulation road (13) is not on vertical plane, but with vertical plane 10 °～30 ° inclination is arranged, and all be to tilt to same direction at circumferencial direction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102111749A CN102895786A (en) | 2011-07-27 | 2011-07-27 | Energy-saving evaporator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102111749A CN102895786A (en) | 2011-07-27 | 2011-07-27 | Energy-saving evaporator |
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| CN102895786A true CN102895786A (en) | 2013-01-30 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103710919A (en) * | 2013-12-20 | 2014-04-09 | 吴江明敏制衣有限公司松陵分公司 | Energy-saving ageing device |
| CN105674457A (en) * | 2016-01-28 | 2016-06-15 | 温州医科大学 | Recoverable medical humidification method and humidifier based on snail-shaped heating rail |
| CN106422400A (en) * | 2016-10-18 | 2017-02-22 | 阿坝州高远锂电材料有限公司 | Crystallizer |
| CN108206064A (en) * | 2017-12-12 | 2018-06-26 | 中国船舶重工集团公司第七〇九研究所 | A kind of steam jet drives passive heat-exchange system |
| CN108211386A (en) * | 2017-10-26 | 2018-06-29 | 湖南工业大学 | A kind of reversed natural-circulation evaporator of automatic cleaning type |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103710919A (en) * | 2013-12-20 | 2014-04-09 | 吴江明敏制衣有限公司松陵分公司 | Energy-saving ageing device |
| CN105674457A (en) * | 2016-01-28 | 2016-06-15 | 温州医科大学 | Recoverable medical humidification method and humidifier based on snail-shaped heating rail |
| CN105674457B (en) * | 2016-01-28 | 2018-08-24 | 温州医科大学 | The medical air-humidification method of recoverable based on snail like heating track and humidifier |
| CN106422400A (en) * | 2016-10-18 | 2017-02-22 | 阿坝州高远锂电材料有限公司 | Crystallizer |
| CN106422400B (en) * | 2016-10-18 | 2018-08-28 | 阿坝州高远锂电材料有限公司 | A kind of crystallizer |
| CN108211386A (en) * | 2017-10-26 | 2018-06-29 | 湖南工业大学 | A kind of reversed natural-circulation evaporator of automatic cleaning type |
| CN108211386B (en) * | 2017-10-26 | 2020-06-30 | 湖南工业大学 | Automatic reverse natural circulation evaporimeter of washing formula |
| CN108206064A (en) * | 2017-12-12 | 2018-06-26 | 中国船舶重工集团公司第七〇九研究所 | A kind of steam jet drives passive heat-exchange system |
| CN108206064B (en) * | 2017-12-12 | 2019-11-12 | 中国船舶重工集团公司第七一九研究所 | A kind of passive heat-exchange system of steam jet driving |
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Application publication date: 20130130 |