CN104296562A - Novel falling film type evaporator - Google Patents
Novel falling film type evaporator Download PDFInfo
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- CN104296562A CN104296562A CN201410561829.9A CN201410561829A CN104296562A CN 104296562 A CN104296562 A CN 104296562A CN 201410561829 A CN201410561829 A CN 201410561829A CN 104296562 A CN104296562 A CN 104296562A
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- heat exchanger
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- exchanger tube
- falling film
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Abstract
The invention discloses a novel falling film type evaporator. The novel falling film type evaporator comprises a shell, an upper pipe plate and a lower pipe plate, wherein the upper pipe plate and the lower pipe plate are arranged in an inner cavity of the shell, the shell is divided into an upper pipe box, a heat exchange cavity and a lower pipe box by the upper pipe plate and the lower pipe plate, the upper pipe box is provided with a fluid inlet in the top, heat exchange pipes are arranged in the heat exchange cavity, and the lower pipe box is provided with a fluid outlet at the bottom. A fluid distributor is arranged in the upper pipe box and below the fluid inlet, the upper ends and the lower ends of the heat exchange pipes are fixedly connected with the upper pipe plate and the lower pipe plate respectively, the inner cavities of the heat exchange pipes are provided with helical grooves and inner rough surfaces along the length direction, the helical grooves are used for changing flow states of the fluid in the heat exchange pipes, and the inner rough surfaces are arranged below the helical grooves. By the aid of the helical grooves and the inner rough surfaces, the filming thickness of the fluid in the heat exchange pipes is increased, heat transfer coefficient of the film layer is increased, heat transfer is intensified, and rip current and dry burning of the heat exchange pipes are avoided.
Description
Technical field
the present invention relates to a kind of Novel falling film formula evaporimeter, be applicable to the industry such as coal chemical industry and fine chemistry industry, food, pharmacy, cold-producing medium.
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Background technology
shell-and-tube heat exchanger is widely used in the industries such as electric power, chemical industry, oil refining, accounts for 70% of heat exchanger total amount, and at present, the structure of most shell-and-tube heat exchanger comprises bobbin carriage, shell, tube sheet, heat exchanger tube, fluid inlet and outlet etc.Wherein: heat exchanger tube two ends through and be sealably coupled to two pieces of tube sheets, two bobbin carriages are sealably coupled to respectively on two tube sheets and (connect the side of heat exchanger tube at tube sheet end).Shell is arranged in outside heat exchanger tube, between two tube sheets, and jointly forms the heat exchanging chamber of sealing with two pieces of tube sheets, heat exchanger tube.A kind of fluid of heat exchange is needed to enter from the entrance a bobbin carriage, enter through bobbin carriage space inside the heat exchanger tube be connected with tube sheet, inside fluid parallel baffled heat exchanger tube, after the heat exchange of heat exchanger tube, enter the bobbin carriage of opposite side, then discharge through bobbin carriage space and the fluid issuing that is connected with bobbin carriage.Need another fluid streams of heat exchange, enter shell through the fluid intake that is connected with shell, and wash away outside heat exchanger tube and carry out heat exchange, the fluid issuing that then warp is connected with shell discharges shell.
the shell-and-tube heat exchanger of above traditional structure, in actual applications, when needing the cold fluid and hot fluid temperature difference of heat exchange larger, shell can be caused to differ larger with heat exchanger tube running temperature, and this larger temperature difference (generally getting 100 DEG C) makes the shell being sealedly attached to two pieces of tube sheets simultaneously, heat exchanger tube length expansion is inconsistent, therefore can be inner at envelope material, heat exchange tube material is inner, tube sheet material is inner, shell and tube sheet connecting material inside, exchanger tubes and tubesheets connecting material inside produces internal stress, material damage or plastic deformation can be caused when this internal stress acquires a certain degree, cause heat exchanger major accident or reduce the heat exchanger life-span.Meanwhile, need the fluid of heat exchange, side is transversal flow heat exchange, side is then longitudinal heat exchange, and because longitudinal heat exchange heat transfer efficiency is lower, the heat exchange efficiency making heat exchanger total is lower.
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Summary of the invention
the object of this invention is to provide the Novel falling film formula evaporimeter that a kind of structure is simple, good effect of heat exchange, heat exchange efficiency are high.
for achieving the above object, the technical solution used in the present invention is: a kind of Novel falling film formula evaporimeter, comprise housing, be arranged in upper perforated plate and the lower perforated plate of described housing cavity, described housing is separated into the upper tube box that top offers fluid intake by described upper perforated plate and described lower perforated plate, inside be provided with the heat exchanging chamber of many heat exchanger tubes, bottom offers the lower tube box of fluid issuing, the below being positioned at described fluid intake in described upper tube box is also provided with fluid distributor, described heat exchanger tube upper, lower two ends are fixedly connected on described upper perforated plate and described lower perforated plate respectively, the spiral channel for alter flow regime in described heat exchanger tube and the rough inner-surface that is positioned at below described spiral channel is provided with along its length in the inner chamber of described heat exchanger tube.
preferably, described fluid distributor is drum-type distributor, comprises being positioned at curved baffle below described fluid intake, being positioned at the distributing disc offering multiple distribution hole below described curved baffle and being fixedly connected on the distributor pipe below described distributing disc by described distribution hole.
preferably, the described spiral channel in described heat exchanger tube inner chamber comprises some helicla flutes, and described spiral fluted groove width is 40mm or 50mm or 60mm, and groove depth is 0.2 ~ 0.5mm.
preferably, described rough inner-surface is formed through sandblasting.
preferably, be also provided with the distribution head of band top cover above described heat exchanger tube, the diameter of described distribution head is less than the diameter of described heat exchanger tube.
preferably, the lateral wall of described upper tube box is also connected with the liquid level gauge for monitoring described upper tube box inner fluid liquid level.
further preferably, be also provided with at least one piece of rigidity deflection plate for fixing described heat exchanger tube in described heat exchanging chamber, one end of described deflection plate is fixedly connected on the inwall of described heat exchanging chamber.
still more preferably, be also provided with at least one in described heat exchanging chamber for supporting the pull bar of described deflection plate, one end of described pull bar is fixedly connected on described lower perforated plate.
due to the utilization of technique scheme, the present invention compared with prior art has following advantages: Novel falling film formula evaporimeter of the present invention, there is by arranging inside in heat exchanging chamber the heat exchanger tube of spiral channel and rough inner-surface, make fluid in heat transfer process, there will not be the phenomenon of rip current and dry combustion method, and have employed drum-type distributor, avoid fluid skewness weighing apparatus in heat exchanger tube, the film forming caused generation dry combustion method that is too thick, that have causes equipment failure; Have employed the distribution head of top closure simultaneously, can effectively anti-fluid to flow directly into from the opening part of heat exchanger tube upper end the fluid distrbution making to be attached to heat exchanger tube inwall uneven, the situation reducing heat exchanger tube heat exchange efficiency occurs.
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Accompanying drawing explanation
accompanying drawing 1 is the structural representation of Novel falling film formula evaporimeter of the present invention;
accompanying drawing 2 is the structural representation of distributor in the embodiment of the present invention;
accompanying drawing 3 is the structural representation of distributing disc in distributor in the embodiment of the present invention;
accompanying drawing 4 is the structural representation of distribution head in the embodiment of the present invention;
accompanying drawing 5 is the structural representation of heat exchanger tube in the embodiment of the present invention;
wherein: 10, housing; 1, upper tube box; 11, fluid intake; 12, distributor; 121, curved baffle; 122, distributing disc; 123, distributor pipe; 124, distribution hole; 13, liquid level gauge; 2, heat exchanging chamber; 21, steam inlet; 22, steam (vapor) outlet; 23, deflection plate; 24, pull bar; 3, lower tube box; 31, fluid issuing; 4, upper perforated plate; 5, lower perforated plate; 6, heat exchanger tube; 61, spiral channel; 62, rough inner-surface; 7, distribution head; 71, top cover.
Detailed description of the invention
below in conjunction with accompanying drawing, technical scheme of the present invention is further elaborated.
shown in Figure 1, a kind of Novel falling film formula evaporimeter, comprise housing 10, be arranged in the upper perforated plate 4 of housing 10 inner chamber and lower perforated plate 5, described upper perforated plate 4 and lower perforated plate 5 housing 10 is separated into top offer fluid intake 11 upper tube box 1, in be provided with the heat exchanging chamber 2 of many heat exchanger tubes 6, lower tube box 3 that bottom offers fluid issuing 31.Shown in Figure 1, heat exchanger tube 6 is positioned at the airtight heat exchanging chamber 2 between upper perforated plate 4 and lower perforated plate 5, and the upper end of this heat exchanger tube 6 is fixedly attached to upper perforated plate 4 upper and lower end and is fixedly attached on lower perforated plate 5.In order to overcome the rip current of fluid in heat exchanger tube 6, improve thickness and the flow regime of heat exchanger tube 6 inner fluid film forming, shown in Figure 5, in the present embodiment, the spiral channel 61 for alter flow regime in heat exchanger tube 6 and the rough inner-surface that is positioned at below spiral channel 61 is offered in the inner chamber of this heat exchanger tube 6.By arranging spiral channel 61, the thicknesses of layers of fluid in heat exchanger tube 6 is increased to some extent, and change the membrane flow state of heat exchanger tube 6 inside, Static Membrane is changed into Dynamic Membrane, by spiral channel 61, fluid is constantly overturn in heat exchanger tube 6 from top to bottom, increase the heat transfer coefficient of rete, enhance heat transfer, improve the whole efficiency of evaporimeter, and the setting of rough inner-surface 62, fluid is dropped on the madial wall of heat exchanger tube 6 further, avoids fluid in the inner surface generation rip current of heat exchanger tube 6 and dry combustion method phenomenon.
see shown in Fig. 1 to Fig. 3, the below being positioned at fluid intake 11 in upper tube box 1 is also provided with fluid distributor 12, in the present embodiment, this fluid distributor 12 is drum-type distributor 12, comprise and be positioned at curved baffle 121 below fluid intake 11, be positioned at the distributing disc 122 offering multiple distribution hole 124 below curved baffle 121 and be fixedly connected on the distributor pipe 123 below distributing disc 122 by distribution hole 124, between this distributor pipe 123 and upper perforated plate 4, leave certain spacing.By arranging drum-type distributor 12 in the below of fluid intake 11, flow in heat exchanger tube 6 with can making fluid well-distributing, avoid fluid skewness weighing apparatus in heat exchanger tube 6, the film forming caused is too thick, and some generation dry combustion methods cause equipment failure.
see Fig. 1, shown in Fig. 4, flow directly into from the opening part of heat exchanger tube 6 upper end to prevent the fluid above upper perforated plate 4, make the fluid distrbution being attached to heat exchanger tube 6 inwall uneven, reduce the heat exchange efficiency of heat exchanger tube 6, in the present embodiment, the distribution head 7 of band top cover 71 is also provided with in the upper end of heat exchanger tube 6, the diameter of described distribution head 7 is less than the diameter of heat exchanger tube 6, and the liquid level gauge 13 be also connected with on the lateral wall of upper tube box 1 for monitoring upper tube box 1 inner fluid liquid level, the liquid level of the fluid submergence distribution head 7 detected by liquid level gauge 13 controls the flow of fluid, thus control the thickness of the fluid film forming of fluid in heat exchanger tube 6, greatly improve the applicable performance of falling-film heat exchanger with load change.
shown in Figure 1, at least one piece of rigidity deflection plate 23 for fixing heat exchanger tube 6 is also provided with in heat exchanging chamber 2, one end of described deflection plate 23 is fixedly connected on the inwall of heat exchanging chamber 2, also be provided with at least one in this heat exchanging chamber 2 for supporting the pull bar 24 of this deflection plate 23, one end of pull bar 24 is fixedly connected on lower perforated plate 5.
in evaporimeter use procedure, fluid enters upper tube box 1 from fluid intake 11, through drum-type distributor 12, is distributed in described heat exchanger tube 6 with making fluid well-distributing, by the distribution head 7 that is positioned at heat exchanger tube 6 upper end and the liquid level gauge 13 be installed on upper tube box 1 sidewall, regulate fluid flow.Also offer for carrying out the steam inlet 21 of heat exchange and steam (vapor) outlet 22 with fluid in heat exchanging chamber 2, the steam that fluid enters after in heat exchanger tube 6 and in heat exchanging chamber 2 carries out heat exchange, because being provided with the rough inner-surface 62 below spiral channel 61 and spiral channel 61 in heat exchanger tube 6, make in heat transfer process, overcome the rip current in heat exchanger tube 6, improve thickness and the flow regime of heat exchanger tube 6 inner fluid film forming.Spiral channel 61 in this heat exchanger tube 6 have employed roll squeezer and is formed from the compacting of heat exchanger tube 6 outer surface, usually this spiral channel 61 comprises multiple helicla flute, this spiral fluted groove width can be 40mm or 50mm or 60mm usually, and groove depth is 0.2 ~ 0.5mm, and rough inner-surface 62 is formed through sandblasting.
in sum, downward film evaporator of the present invention, be provided with spiral channel in employing and be positioned at the heat exchanger tube of the rough inner-surface below spiral channel, avoid heat exchanger tube and occur rip current in heat transfer process, improve thickness and the flow regime of the fluid film forming in heat exchanger tube, substantially bright state is belonged in the heat exchanger tube of traditional downward film evaporator, decrease skin resistance, but due to the fluctuation of load, often can there is the phenomenon of rip current and dry combustion method in the part in the inside of heat exchanger tube near lower end, heat exchanger tube of the present invention is adopted then to avoid the generation of this phenomenon, spiral channel in heat exchanger tube inner chamber constantly overturns from top to bottom by fluid, increase the heat transfer coefficient of rete, enhance heat transfer, the whole efficiency of evaporimeter is made to improve more than 30%, substantially increase the heat exchange efficiency of heat exchanger, save the energy, the distribution head that simultaneously have employed band top cover coordinates the use of liquid level gauge, fluid flow can be controlled according to the liquid level of liquid level submergence distribution head, thus control the fluid film forming thickness in heat exchanger tube, and determine the flow of opening part according to the viscosity of fluid and liquid level at distribution head opening part liquid-level pressure, implementation procedure is controlled, and the setting of drum-type distributor, ensure that the uniformity that fluid distributes on distributing disc, avoid the skewness weighing apparatus of fluid in heat exchanger tube, the film forming caused generation dry combustion method that is too thick, that have causes equipment failure, and what the diameter of equipment also can be made to do is larger.
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above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (8)
1. a Novel falling film formula evaporimeter, comprise housing, be arranged in upper perforated plate and the lower perforated plate of described housing cavity, described housing is separated into the upper tube box that top offers fluid intake by described upper perforated plate and described lower perforated plate, inside be provided with the heat exchanging chamber of many heat exchanger tubes, bottom offers the lower tube box of fluid issuing, it is characterized in that: the below being positioned at described fluid intake in described upper tube box is also provided with fluid distributor, described heat exchanger tube upper, lower two ends are fixedly connected on described upper perforated plate and described lower perforated plate respectively, the spiral channel for alter flow regime in described heat exchanger tube and the rough inner-surface that is positioned at below described spiral channel is provided with along its length in the inner chamber of described heat exchanger tube.
2. Novel falling film formula evaporimeter according to claim 1, it is characterized in that: described fluid distributor is drum-type distributor, comprise and be positioned at curved baffle below described fluid intake, be positioned at the distributing disc offering multiple distribution hole below described curved baffle and be fixedly connected on the distributor pipe below described distributing disc by described distribution hole.
3. Novel falling film formula evaporimeter according to claim 1, it is characterized in that: the described spiral channel in described heat exchanger tube inner chamber comprises some helicla flutes, described spiral fluted groove width is 40mm or 50mm or 60mm, and groove depth is 0.2 ~ 0.5mm.
4. Novel falling film formula evaporimeter according to claim 1, is characterized in that: described rough inner-surface is formed through sandblasting.
5. Novel falling film formula evaporimeter according to claim 1, is characterized in that: the distribution head being also provided with band top cover above described heat exchanger tube, the diameter of described distribution head is less than the diameter of described heat exchanger tube.
6. Novel falling film formula evaporimeter according to claim 1, is characterized in that: the lateral wall of described upper tube box is also connected with the liquid level gauge for monitoring described upper tube box inner fluid liquid level.
7. according to the arbitrary described Novel falling film formula evaporimeter of claim 1 to 6, it is characterized in that: be also provided with at least one piece of rigidity deflection plate for fixing described heat exchanger tube in described heat exchanging chamber, one end of described deflection plate is fixedly connected on the inwall of described heat exchanging chamber.
8. Novel falling film formula evaporimeter according to claim 7, is characterized in that: be also provided with at least one in described heat exchanging chamber for supporting the pull bar of described deflection plate, one end of described pull bar is fixedly connected on described lower perforated plate.
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| CN201410561829.9A CN104296562A (en) | 2014-10-21 | 2014-10-21 | Novel falling film type evaporator |
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| CN201410561829.9A CN104296562A (en) | 2014-10-21 | 2014-10-21 | Novel falling film type evaporator |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105233517A (en) * | 2015-10-14 | 2016-01-13 | 长岭炼化岳阳工程设计有限公司 | Built-in falling film-type reboiler rectification tower and rectification method thereof |
| CN106268595A (en) * | 2016-08-05 | 2017-01-04 | 洛阳双瑞特种装备有限公司 | A kind of vertical tube falling absorbs reactor |
| CN108114498A (en) * | 2018-01-24 | 2018-06-05 | 无锡力马化工机械有限公司 | A kind of large size short-distance distiller |
| CN109269158A (en) * | 2018-11-28 | 2019-01-25 | 珠海格力电器股份有限公司 | Falling film evaporator and air conditioning system |
| CN111530106A (en) * | 2020-06-05 | 2020-08-14 | 新疆中泰纺织集团有限公司 | Falling film evaporator capable of resisting liquid level fluctuation |
| CN114053743A (en) * | 2021-12-21 | 2022-02-18 | 烟台国邦化工机械科技有限公司 | Novel liquid distribution and film forming device of falling film reboiler |
| CN114247386A (en) * | 2021-11-24 | 2022-03-29 | 中国五环工程有限公司 | Evaporative isothermal hydrogenation reaction method and evaporative isothermal reaction system |
| CN115218557A (en) * | 2022-07-07 | 2022-10-21 | 西安东方能源工程有限公司 | Pressure-equalizing spiral shell type falling film evaporator |
| CN115752024A (en) * | 2022-11-16 | 2023-03-07 | 宜兴市冰源制冷设备有限公司 | High-energy-efficiency falling film type heat exchanger and use method thereof |
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| US3849232A (en) * | 1972-03-16 | 1974-11-19 | Wiegand Karlsruhe Gmbh | Falling film evaporator |
| CN2227814Y (en) * | 1995-02-24 | 1996-05-22 | 石家庄铝厂 | Refrigerating tube for heat exchanger |
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| CN202270370U (en) * | 2011-10-12 | 2012-06-13 | 新昌德力石化设备有限公司 | Distributing head of falling film evaporator |
| CN203037138U (en) * | 2013-01-17 | 2013-07-03 | 四川武胜春瑞医药化工有限公司 | Tube nest type condenser |
| CN204142050U (en) * | 2014-10-21 | 2015-02-04 | 张家港市江南锅炉压力容器有限公司 | A kind of Novel falling film formula evaporimeter |
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2014
- 2014-10-21 CN CN201410561829.9A patent/CN104296562A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3849232A (en) * | 1972-03-16 | 1974-11-19 | Wiegand Karlsruhe Gmbh | Falling film evaporator |
| CN2227814Y (en) * | 1995-02-24 | 1996-05-22 | 石家庄铝厂 | Refrigerating tube for heat exchanger |
| CN201368685Y (en) * | 2009-02-11 | 2009-12-23 | 赛鼎工程有限公司 | Falling film evaporator |
| CN101614494A (en) * | 2009-07-21 | 2009-12-30 | 华南理工大学 | The fixed tube sheet type prestressed heat exchanger and the processing method thereof of band external flow guiding cylinder |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105233517A (en) * | 2015-10-14 | 2016-01-13 | 长岭炼化岳阳工程设计有限公司 | Built-in falling film-type reboiler rectification tower and rectification method thereof |
| CN106268595A (en) * | 2016-08-05 | 2017-01-04 | 洛阳双瑞特种装备有限公司 | A kind of vertical tube falling absorbs reactor |
| CN108114498A (en) * | 2018-01-24 | 2018-06-05 | 无锡力马化工机械有限公司 | A kind of large size short-distance distiller |
| CN109269158A (en) * | 2018-11-28 | 2019-01-25 | 珠海格力电器股份有限公司 | Falling film evaporator and air conditioning system |
| CN111530106A (en) * | 2020-06-05 | 2020-08-14 | 新疆中泰纺织集团有限公司 | Falling film evaporator capable of resisting liquid level fluctuation |
| CN114247386A (en) * | 2021-11-24 | 2022-03-29 | 中国五环工程有限公司 | Evaporative isothermal hydrogenation reaction method and evaporative isothermal reaction system |
| CN114247386B (en) * | 2021-11-24 | 2023-10-13 | 中国五环工程有限公司 | Evaporation type isothermal hydrogenation reaction method and evaporation type isothermal reaction system |
| CN114053743A (en) * | 2021-12-21 | 2022-02-18 | 烟台国邦化工机械科技有限公司 | Novel liquid distribution and film forming device of falling film reboiler |
| CN115218557A (en) * | 2022-07-07 | 2022-10-21 | 西安东方能源工程有限公司 | Pressure-equalizing spiral shell type falling film evaporator |
| CN115752024A (en) * | 2022-11-16 | 2023-03-07 | 宜兴市冰源制冷设备有限公司 | High-energy-efficiency falling film type heat exchanger and use method thereof |
| CN115752024B (en) * | 2022-11-16 | 2024-02-06 | 宜兴市冰源制冷设备有限公司 | High-energy-efficiency falling film type heat exchanger and use method thereof |
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