CN103712516A - Undulating flow reciprocating screw vibrating cleaning type natural circulating evaporator - Google Patents
Undulating flow reciprocating screw vibrating cleaning type natural circulating evaporator Download PDFInfo
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- CN103712516A CN103712516A CN201210374812.3A CN201210374812A CN103712516A CN 103712516 A CN103712516 A CN 103712516A CN 201210374812 A CN201210374812 A CN 201210374812A CN 103712516 A CN103712516 A CN 103712516A
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Abstract
Disclosed is an undulating flow reciprocating screw vibrating cleaning type natural circulating evaporator. An undulating flow reciprocating screw of a steel wire structure is mounted in each heating pipe, the lower end of each undulating flow reciprocating screw is connected with a soft spring which penetrates a fixing plate to be wound and fixed on an assembling plate, and elastic coefficient of the soft springs is low. A fluid dynamic cleaning principle of the undulating flow reciprocating screws includes that high volatility of gas-liquid two-phase flow in the heating pipes is utilized to generate strong radial vibration on self-acting fluid dynamic force and generate axial reciprocating motion with stroke larger than one own screw pitch at the same time, and automatic cleaning of dirt on the inner wall of each pipe and convective heat transfer enhancing are realized. An undulating flow reciprocating screw cleaning mechanism is simple in structure, high in dirt cleaning capability, good in cleaning uniformity, suitable for natural circulating evaporators where dirt is prone to growing, and suitable for outer-heating-chamber natural circulating evaporators and outer-heating-chamber natural circulating reboilers.
Description
Technical field
The reciprocal spiral vibrating cleaning type of undulating flow of the present invention natural-circulation evaporator, relates to automatic cleaning in the heating tube of natural-circulation evaporator and reboiler, heat conduction reinforced.It is mainly applicable to evaporimeter and the reboiler of the natural circulation structure of easy growth dirt, especially hard scale in heating tube.
Background technology
Natural-circulation evaporator structure is the simplest, but Natural Circulation flow velocity is low, and heating in-tube fouling is thicker sooner than the evaporimeter of other structure type, needs cleaning during shutdown more frequent, and efficiency is minimum, energy consumption is the highest.
Although it is multiple that existing evaporimeter automatic cleaning technology has, all inapplicable.The scraper film evaporator that domestic many companies produce, is difficult to maximize, and complex structure unit area building cost is expensive, scraper plate quick abrasion, and scale removal energy consumption is high.Twisted strip cleaning technique (ZL002224697.x rotation twisted strip automatic washing type high-efficient evaporimeter) scale removal ability too a little less than, can not meet the demands.Vapor-liquid-solid three-phase flow state technology (the three-phase flow evaporation antiscale power-saving technology of Chinese well mine salt the 1st phase in 2012; The vaporising device antiscale new technology of inorganic chemicals industry the 8th phase in 2008 and the application in Calcium Chloride Production thereof), cleansing power is larger, but tube bank particle is uniformly distributed and inevitably all enters after the fluidization fine particle after difficulty, particle outer circulation system complex, particle drawing small in feed liquid etc.
Summary of the invention
The reciprocal spiral vibrating cleaning type of the undulating flow natural-circulation evaporator that the present invention proposes, utilize the interior steam bubble of natural-circulation evaporator heating tube and mother liquor two-phase flow speed to have the feature moving compared with high-amplitude wave and realize cleaning automatically, not only can solve the problem of twisted strip cleansing power deficiency, and simple more than scraper-type evaporimeter and three-phase fluidization evaporimeter in structure, technical difficulty also reduces greatly.
Technical scheme of the present invention is: the reciprocal spiral vibrating cleaning type of undulating flow natural-circulation evaporator, critical piece has heating tube, the reciprocal spiral that fluctuates, slinky spring, vaporization chamber, Natural Circulation pipe.
The reciprocal spiral of fluctuation of installing in heating tube, it is the fluctuation flow velocity that utilizes the unstable stream-liquid two-phase flow that in evaporator heating pipe, steam bubble causes, hydrokinetic fluctuation to self-acting, produce stronger radial vibration, there are again per minute ten left and right, strokes to be greater than the axially reciprocating of self pitch, realize the automatic cleaning to inside pipe wall dirt.Meanwhile, due to the periodic disturbance of the reciprocal spiral of fluctuation to duct fluid flow, realize the strengthening of convection heat transfer' heat-transfer by convection in heating tube.Fluctuate the steel wire diameter of reciprocal spiral in 1.0～3.0mm scope, and the external diameter of the reciprocal spiral that fluctuates is than the little 3～10mm of heating tube internal diameter, the pitch of the reciprocal spiral that fluctuates be heating tube internal diameter (0.40～1.20) doubly.The reciprocal spiral that fluctuates is generally the manufacture of stainless steel steel wire, for severe corrosive feed liquid, can adopt that steel wire is plastic, plastic-blasting, soak and the anti-corrosion treatment such as mould.
The fluctuate upper end of reciprocal spiral, can be tail end freely, can be to be also connected with strengthening ball.Strengthening ball utilizes heating tube exit liquid-vapor mixture flow velocity to be several times as much as the high velocity stream of inlet velocity, and impulsive force is large, and fluctuation is larger again, increases the reciprocating motion stroke of the reciprocal spiral of fluctuation.Another effect of strengthening ball is the installation of the reciprocal spiral of convenient fluctuation, makes the reciprocal spiral of fluctuation in mounting pipe can under the effect of deadweight, not be deformed into the snakelike inside pipe wall that is stuck in, normal work when impact is driven.The material of strengthening ball can be timber, plastics or rubber.The heating tube port of export is designed with sheath, and the rear of the reciprocal spiral of avoiding fluctuating acutely swings the damage to inside pipe wall surface; Sheath is designed with 3 above rest muscle, and it is highly greater than 0.25 times of heating tube internal diameter, can, when strengthening ball does not depart from sheath, guarantee that ring exit circulation area is still greater than the circulation area in heating tube.
The coefficient of elasticity of slinky spring is low, and in the scope of 6-15 (N/m), value and heat transfer temperature difference size, heating tube length have comformity relation.Slinky spring is connected to the lower end of the reciprocal spiral of fluctuation.The fluctuation that the reciprocal spiral that fluctuates bears the axial force size of stream-liquid two-phase flow effect changes, and the length of the slinky spring that is attached thereto is produced larger flexible, and the reciprocating stroke that reaches the reciprocal spiral of fluctuation is not less than the even cleaning requirement of self pitch.Slinky spring is arranged in assembled plate.Fixed form is the aperture that slinky spring passes assembled plate, then is wrapped on grouping steel wire.Grouping two slinky springs that are at least fastened on steel wire, the reciprocal spiral that prevents from fluctuating rotates under the mobile drive of tube fluid, in order to avoid occur and heating tube inner wall abrasion problem.Assembled plate is welded on Natural Circulation inside pipe wall or tube sheet by fixed bar, and the reciprocal spiral of convenient fluctuation and slinky spring are installed to the installment work of assembled plate.
The reciprocal spiral cleaning mechanism of fluctuating can be applied to additional hot cell natural-circulation evaporator and reboiler equally.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the reciprocal spiral vibrating cleaning type of undulating flow of the present invention natural-circulation evaporator.
Fig. 2 is the jacket structure enlarged drawing in heating tube exit
Fig. 3 is the schematic diagram of the additional hot cell of the reciprocal spiral vibrating cleaning type of undulating flow of the present invention natural-circulation evaporator.
Fig. 4 is the schematic diagram of the additional hot cell of the reciprocal spiral vibrating cleaning type of undulating flow of the present invention Natural Circulation reboiler.
The specific embodiment
Below in conjunction with accompanying drawing 1, the present invention is described in further detail.
At the bottom of the reciprocal spiral 6 heating tube 7 slinky spring 8 assembled plate 9 grouping steel wire 10 kerve 11 fixed bar 12 heating clamber 13 Natural Circulation pipe 14 liquid level 15 sheath 16 additional hot cell of rest muscle 17 18 column plate 19 towers of 1 vaporization chamber 2 visor 3 strengthening ball 4 tube sheet 5 fluctuation in figure
The reciprocal spiral vibrating cleaning type of undulating flow natural-circulation evaporator, critical piece has heating tube 6, the reciprocal spiral 5 that fluctuates, slinky spring 7, assembled plate 8, grouping steel wire 9, vaporization chamber 1, Natural Circulation pipe 13.
The reciprocal spiral 5 of fluctuation of heating tube 6 interior installations, it is the fluctuation flow velocity that utilizes the unstable stream-liquid two-phase flow that the interior steam bubble of evaporator heating pipe 6 causes, hydrokinetic fluctuation to self-acting, produce stronger radial vibration, there are again per minute ten left and right, strokes to be greater than the axially reciprocating of self pitch, realize the automatic cleaning to inside pipe wall dirt.Meanwhile, due to the periodic disturbance of 5 pairs of duct fluid flows of the reciprocal spiral of fluctuation, realize the strengthening of heating tube 6 interior convection heat transfer' heat-transfer by convection.Fluctuate the steel wire diameter of reciprocal spiral 5 in 1.0～3.0mm scope, and the external diameter of the reciprocal spiral 5 that fluctuates is than the little 3～10mm of heating tube 6 internal diameter, the pitch of the reciprocal spiral 5 that fluctuates be heating tube 6 internal diameters (0.40～1.20) doubly.The reciprocal spiral 5 that fluctuates is generally the manufacture of stainless steel steel wire, for severe corrosive feed liquid, can adopt that steel wire is plastic, plastic-blasting, soak and the anti-corrosion treatment such as mould.
The fluctuate upper end of reciprocal spiral 5, can be tail end freely, can be to be also connected with strengthening ball 3.Strengthening ball 3 utilizes heating tube 6 exit liquid-vapor mixture flow velocitys to be several times as much as the high velocity stream of inlet velocity, and impulsive force is large, and fluctuation is larger again, increases the reciprocating motion stroke of the reciprocal spiral 5 of fluctuation.Another effect of strengthening ball 3 is the installation of the reciprocal spiral 5 of convenient fluctuation, and the reciprocal spiral 5 of fluctuation that makes to install in heating tube 6 can not be deformed into the snakelike inside pipe wall that is stuck in, normal work when impact is driven under the effect of deadweight.The material of strengthening ball 3 can be timber, plastics or rubber.Heating tube 6 ports of export are designed with sheath 15, and the rear of the reciprocal spiral 5 of avoiding fluctuating acutely swings the damage to inside pipe wall surface; Sheath 15 is designed with 3 above rest muscle 16, and it is highly greater than 0.25 times of heating tube 6 internal diameters, can, when strengthening ball 3 does not depart from sheath 3, guarantee that ring exit circulation area is still greater than the circulation area in heating tube 6.
The coefficient of elasticity of slinky spring 7 is low, and in the scope of 6-15 (N/m), value and heat transfer temperature difference size, heating tube 6 length have comformity relation.Slinky spring 7 is connected to the lower end of the reciprocal spiral 5 of fluctuation.The fluctuation that the reciprocal spiral 5 that fluctuates bears the axial force size of stream-liquid two-phase flow effect changes, and the length of the slinky spring 7 that is attached thereto is produced larger flexible, and the reciprocating stroke that reaches the reciprocal spiral 5 of fluctuation is not less than the even cleaning requirement of self pitch.Slinky spring 7 is arranged in assembled plate 8.Fixed form is that slinky spring 7 passes the aperture of assembled plate 8, then is wrapped on grouping steel wire 9.Grouping two slinky springs 7 that are at least fastened on steel wire 9, the reciprocal spiral 5 that prevents from fluctuating rotates under the mobile drive of tube fluid, in order to avoid occur and heating tube 6 inner wall abrasion problems.Assembled plate 8 is welded on 16 circulation pipe inwalls or tube sheet 4 by fixed bar 11, and the reciprocal spiral 5 of convenient fluctuation and slinky spring 7 are installed to the installment work of assembled plate 8.
The complete wiper mechanism of reciprocal spiral 6 of fluctuating can be applied to natural-circulation evaporator and the reboiler in additional hot cell 17 equally.
Claims (5)
1. the reciprocal spiral vibrating cleaning type of undulating flow natural-circulation evaporator, critical piece has heating tube (6), the reciprocal spiral (5) that fluctuates, slinky spring (7), vaporization chamber (1), Natural Circulation pipe (13), it is characterized by: the reciprocal spiral of fluctuation (5) that in heating tube, install (6), under the effect of the unstable stream-liquid two-phase flow causing at steam bubble, produce stroke and be greater than reciprocating motion and the radial vibration of self pitch, automatically the dirt of scavenge pipe inwall, strengthens again convection heat transfer' heat-transfer by convection; The coefficient of elasticity of slinky spring (7) is in the scope of 6-15 (N/m); The fixed form of reciprocal spiral (5) of fluctuating is that lower end is first connected with slinky spring (7), by slinky spring (7), be fixed to assembled plate (8) upper: assembled plate (8) is welded on Natural Circulation pipe (13) inwall by fixed bar, the installation of convenient fluctuation reciprocal spiral (5) and slinky spring (7).
2. according to the reciprocal spiral vibrating cleaning type of the undulating flow of claim 1 natural-circulation evaporator, it is characterized in that: the steel wire diameter of the reciprocal spiral (5) that fluctuates is in 1.0～3.0mm scope, fluctuate the external diameter of reciprocal spiral (5) than the little 3～10mm of heating tube (6) internal diameter, the pitch of the reciprocal spiral (5) that fluctuates be heating tube (6) internal diameter (0.40～1.20) doubly.
3. according to the reciprocal spiral vibrating cleaning type of the undulating flow of claim 1 natural-circulation evaporator, it is characterized in that: the upper end of the reciprocal spiral (5) that fluctuates connects strengthening ball (3), increase the axially reciprocating stroke of the reciprocal spiral of fluctuation (5), again the installation of the reciprocal spiral of convenient fluctuation (5); The material of strengthening ball (3) is timber or plastics and rubber.
4. according to the reciprocal spiral vibrating cleaning type of the undulating flow of claim 1 natural-circulation evaporator, it is characterized in that: heating tube (6) port of export is designed with sheath (15), the afterbody of the reciprocal spiral (5) of avoiding fluctuating acutely swings the damage to inside pipe wall surface; Sheath (15) is designed with 3 above rest muscle (16), and the height of rest muscle (16) is greater than 0.25 times of heating tube (6) internal diameter.
5. according to the reciprocal spiral vibrating cleaning type of the undulating flow of claim 1 natural-circulation evaporator, it is characterized in that: the fixed form of slinky spring (7) is first to pass the aperture of assembled plate (8), be fastened again upper at grouping steel wire (9), and two slinky springs (7) that are at least fastened on every grouping steel wire (9).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210374812.3A CN103712516A (en) | 2012-10-08 | 2012-10-08 | Undulating flow reciprocating screw vibrating cleaning type natural circulating evaporator |
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| CN201210374812.3A CN103712516A (en) | 2012-10-08 | 2012-10-08 | Undulating flow reciprocating screw vibrating cleaning type natural circulating evaporator |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865253A (en) * | 2016-03-30 | 2016-08-17 | 神华集团有限责任公司 | Heat exchanger and tower system provided with same |
| CN106311685A (en) * | 2016-08-30 | 2017-01-11 | 安徽安特食品股份有限公司 | Non-halt efficient scale removing equipment of horizontal reboiler |
| CN106377912A (en) * | 2016-08-02 | 2017-02-08 | 湖南帅科节能环保装备有限公司 | Evaporator capable of realizing spiral cleaning under action of surge power |
| CN106378342A (en) * | 2016-08-30 | 2017-02-08 | 安徽安特食品股份有限公司 | Horizontal reboiler non-stop descaling device |
| CN106382844A (en) * | 2016-07-12 | 2017-02-08 | 湖南帅科节能环保装备有限公司 | Three-screw automatic cleaning and natural circulating evaporator |
| CN106390490A (en) * | 2016-06-16 | 2017-02-15 | 湖南工业大学 | Impulse umbrella type natural-circulation evaporator |
| CN107051270A (en) * | 2016-12-30 | 2017-08-18 | 广西利升石业有限公司 | A kind of high efficiency resin heats bucket |
| CN107702587A (en) * | 2017-10-30 | 2018-02-16 | 俞天翔 | Couple spiral cleaning formula natural-circulation evaporator |
| CN110068173A (en) * | 2019-05-20 | 2019-07-30 | 南京工程学院 | A kind of heat source tower heat pump special efficient flooded evaporator |
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| CN2430667Y (en) * | 2000-04-27 | 2001-05-16 | 株洲工学院帅科机械清洗研究所 | Self rotary button automatic cleaning high efficiency ecaporator |
| CN1862213A (en) * | 2005-05-13 | 2006-11-15 | 株洲工学院 | Gas jet pulse screw automatic washing type high-efficient heat transfer device |
| CN200989748Y (en) * | 2006-08-14 | 2007-12-12 | 张贵祥 | Self-changing fluidized plastic spiral link |
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| CN2430667Y (en) * | 2000-04-27 | 2001-05-16 | 株洲工学院帅科机械清洗研究所 | Self rotary button automatic cleaning high efficiency ecaporator |
| CN1862213A (en) * | 2005-05-13 | 2006-11-15 | 株洲工学院 | Gas jet pulse screw automatic washing type high-efficient heat transfer device |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865253B (en) * | 2016-03-30 | 2017-12-19 | 神华集团有限责任公司 | Heat exchanger and there is its Tower System |
| CN105865253A (en) * | 2016-03-30 | 2016-08-17 | 神华集团有限责任公司 | Heat exchanger and tower system provided with same |
| CN106390490B (en) * | 2016-06-16 | 2019-01-04 | 湖南工业大学 | A kind of impulsion umbrella-type natural-circulation evaporator |
| CN106390490A (en) * | 2016-06-16 | 2017-02-15 | 湖南工业大学 | Impulse umbrella type natural-circulation evaporator |
| CN106382844B (en) * | 2016-07-12 | 2018-10-23 | 湖南帅科节能环保装备有限公司 | Three spiral shells of one kind cleaning natural-circulation evaporator automatically |
| CN106382844A (en) * | 2016-07-12 | 2017-02-08 | 湖南帅科节能环保装备有限公司 | Three-screw automatic cleaning and natural circulating evaporator |
| CN106377912A (en) * | 2016-08-02 | 2017-02-08 | 湖南帅科节能环保装备有限公司 | Evaporator capable of realizing spiral cleaning under action of surge power |
| CN106311685B (en) * | 2016-08-30 | 2018-08-17 | 安徽安特食品股份有限公司 | A kind of horizontal reboiler does not shut down efficient descaling equipment |
| CN106378342A (en) * | 2016-08-30 | 2017-02-08 | 安徽安特食品股份有限公司 | Horizontal reboiler non-stop descaling device |
| CN106311685A (en) * | 2016-08-30 | 2017-01-11 | 安徽安特食品股份有限公司 | Non-halt efficient scale removing equipment of horizontal reboiler |
| CN107051270A (en) * | 2016-12-30 | 2017-08-18 | 广西利升石业有限公司 | A kind of high efficiency resin heats bucket |
| CN107702587A (en) * | 2017-10-30 | 2018-02-16 | 俞天翔 | Couple spiral cleaning formula natural-circulation evaporator |
| CN107702587B (en) * | 2017-10-30 | 2019-05-24 | 俞天翔 | Couple spiral cleaning formula natural-circulation evaporator |
| CN110068173A (en) * | 2019-05-20 | 2019-07-30 | 南京工程学院 | A kind of heat source tower heat pump special efficient flooded evaporator |
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Application publication date: 20140409 |