CN204723782U - Little temperature difference shell journey becomes the no baffle plate high-efficiency energy-saving evaporator in space - Google Patents

Little temperature difference shell journey becomes the no baffle plate high-efficiency energy-saving evaporator in space Download PDF

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CN204723782U
CN204723782U CN201520337995.0U CN201520337995U CN204723782U CN 204723782 U CN204723782 U CN 204723782U CN 201520337995 U CN201520337995 U CN 201520337995U CN 204723782 U CN204723782 U CN 204723782U
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tube
shell
housing
space
pipeline section
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朱冬生
王洪
吴子龙
朱振奇
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Guangzhou Institute of Energy Conversion of CAS
TCL Air Conditioner Zhongshan Co Ltd
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Guangzhou Institute of Energy Conversion of CAS
TCL Air Conditioner Zhongshan Co Ltd
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Abstract

The utility model discloses the no baffle plate high-efficiency energy-saving evaporator that little temperature difference shell journey becomes space, it comprises housing, upper cover, lower shell, low head, tube sheet and heat-exchanging tube bundle, described upper cover is located at the upper end of housing, described lower shell is arranged between the lower end of housing and low head, described tube sheet is provided with two, be located at the junction of upper cover and housing and the junction of lower shell and housing respectively, described heat-exchanging tube bundle is located in housing, described heat-exchanging tube bundle is made up of some heat exchanger tubes, the two ends up and down of heat exchanger tube are communicated with corresponding tube sheet respectively, heat exchanger tube inner space is tube side, the shell intracorporeal space of heat exchanger tube outside is shell side, described heat exchanger tube is spirally twisted flat-tube, major axis between adjacent heat exchange tubes contacts with each other to form self supporting structure.Compared with prior art, the utility model has the advantages such as structure is simple, volume is little, heat-transfer effect is good, flow resistance is little, the adherent property of evaporation liquid film is good, long service life.

Description

Little temperature difference shell journey becomes the no baffle plate high-efficiency energy-saving evaporator in space
Technical field
The utility model relates to a kind of evaporimeter, is specifically related to the energy-efficient falling film evaporator that a kind of little temperature difference shell journey becomes the no baffle plate in space.
Background technology
Under the situation of energy-saving and emission-reduction low-carbon economy development, utilitarian design is novel, and little temperature difference shell journey becomes the no baffle plate high-efficiency energy-saving evaporator in space, realize the flowing that evaporator tube/shell side space is controlled, improve heat transfer efficiency 20-40% and reduce the energy-conservation 30-70% of running resistance.Adopt SP pipe/PS pipe can make falling film evaporator material-saving 15-30%, the little 20-40% of volume, weight reduce 30%.Achieve industrialization outfit Technology design software and copyright.HPMVR multiple-effect evaporation heat pump energy-saving system adopts the novel little temperature difference high-efficiency evaporator of SP/PS, be applied to multiple-effect evaporation, desalinization, waste water control, high-concentration salt-containing wastewater process, the process of rubbish concentrate, can save energy 70-90% relative to multi-effect evaporation system, 1-2 can recoup the investment.Its key is that high-efficiency evaporator becomes space, no baffle plate design and manufacturing technology.High-efficiency evaporator adopts SP element to improve heat transfer efficiency 15-30%; SP pipe becomes the resistance that spatial design technology can reduce fluid flowing, can realize energy-conservation 20-35%.Volume little 20-35% material-saving weight reduces 30-40%'s.
Traditional vertical falling-film evaporimeter adopts common pipe, and shell side medium is high-temperature steam, and tube side medium is raw materials evaporate liquid, and heat transfer area utilization rate is low, there is heat transfer efficiency low, easy fouling, and flow resistance is large, and fluid transversal flow restrains the shortcomings such as easy induced vibration.
Utility model content
The purpose of this utility model is exactly provide that a kind of structure is simple, heat-transfer effect good, the high-efficiency falling film evaporation device of long service life to overcome defect that above-mentioned prior art exists.
The purpose of this utility model can be achieved through the following technical solutions:
Little temperature difference shell journey becomes the no baffle plate high-efficiency energy-saving evaporator in space, its entirety is vertical shell-and-tube evaporation structure, described vertical shell-and-tube evaporation structure comprises housing, upper cover, lower shell, low head, tube sheet and heat-exchanging tube bundle, described upper cover is located at the upper end of housing, described lower shell is arranged between the lower end of housing and low head, described tube sheet is provided with two, be located at the junction of upper cover and housing and the junction of lower shell and housing respectively, described heat-exchanging tube bundle is located in housing, described heat-exchanging tube bundle is made up of some heat exchanger tubes, the two ends up and down of heat exchanger tube are communicated with corresponding tube sheet respectively, heat exchanger tube inner space is tube side, the shell intracorporeal space of heat exchanger tube outside is shell side, described heat exchanger tube is spirally twisted flat-tube, major axis between adjacent heat exchange tubes contacts with each other to form self supporting structure.
Described heat exchanger tube comprises arrival end pipe pipeline section, twisted oval tube pipeline section and port of export pipe pipeline section, one end of described arrival end pipe pipeline section and port of export pipe pipeline section is fixedly connected on the two ends of twisted oval tube pipeline section respectively, the other end of described arrival end pipe pipeline section is each passed through upper cover and is communicated with upper cover with the tube sheet of the junction of housing, the other end of described port of export pipe pipeline section is communicated with lower shell with the tube sheet of the junction of housing through lower shell, relies on the major axis of twisted oval tube pipeline section to contact with each other between described adjacent heat exchange tubes.
Described twisted oval tube pipeline section is after being pressed into oval pipe by round tube, along the axial helicoidal structure reversed by moment of torsion 200 ~ 270Nm of oval pipe.
The length ratio of twisted oval tube pipeline section and arrival end pipe pipeline section (or port of export pipe pipeline section) is 3 ~ 5:1 ~ 2.
Described arrival end pipe pipeline section, twisted oval tube pipeline section and port of export pipe pipeline section are one-body molded.
Triangle or hexagon or square is adopted to arrange between described heat exchanger tube.
The upper and lower both sides of described housing are respectively equipped with shell side steam inlet and shell side cooling liquid outlet, and described shell side steam inlet is all connected with shell side with shell side cooling liquid outlet.
Described upper cover and low head are provided with tube side feed liquid port and a concentrated solution outlet, and described tube side feed liquid port is connected with lower shell with upper cover respectively with concentrated solution outlet.
The side of described lower shell is connected with separator by separator adapter.
Described separator comprises Membrane Separator Cylinder for CFB Boiler and is arranged at Membrane Separator Cylinder for CFB Boiler upper/lower terminal separator gaseous phase outlet and separator liquid phase outlet.
The upper and lower side of described housing is respectively equipped with an exhaust outlet be connected with shell side and shell side drain.
The utility model structure decreases shell side free air space, and adopts variable cross-section twisted oval tube, and the flowing of its shell-side fluid is for becoming space longitudinal flow, and tube side is variable cross-section three-dimensional structure, and its tube side thin film drainage is for becoming spatially spiral flowing.
Its operating principle: high-efficiency evaporator adopts SP (steel-plastics composite pipe) element, and the liquid that need concentrate enters SP spiral heat exchange elliptical tube top, form rotary centrifugal force along spiral heating elliptical tube inside pipe wall, the thin tube wall film of being close to of liquid flows downward.In this process due to the heating outside pipe, intraluminal fluid film comes to life and part evaporation.Moving downward of liquid film is due to gravity and spiral heating elliptical tube centrifugal action at first, and then in pipe, steam constantly generates, and the steam zone hydrodynamic film flowed downward makes it downward motion to be accelerated.In the whizzer in tubulation bottom and downstream thereof, remaining liquid is separated with steam.In order to ensure the function of falling film evaporator, whole area of heating surface, especially heating tube lower area can be very important by full and uniform the soaking of liquid.Otherwise Local Dry wall will be there is, thus cause serious encrustation phenomena.Therefore, this project high-efficiency evaporator adopts SP element, the centrifugal action that the liquid film moved downward utilizes gravity and spiral heating elliptical tube to produce, the thin tube wall film of being close to of liquid is forced to flow downward, ensure that whole areas of heating surface of falling film evaporator are full and uniform wetting by liquid, avoid Local Dry wall phenomenon, thus serious encrustation phenomena can be prevented.In addition, in the heating steam condensation gradually of shell side, steam diminishes in the space of shell side; And the liquid in pipe constantly evaporates, volume becomes large, by changing SP tubular construction, can adjust the shell journey space that this little temperature difference shell journey becomes the no baffle plate high-efficiency energy-saving evaporator in space, to adapt to the Volume Changes of the fluid inside and outside evaporator tube.
Compared with prior art, the utility model has the following advantages and beneficial effect:
(1) the no baffle plate high-efficiency energy-saving evaporator that little temperature difference shell journey of the present utility model becomes space eliminates the baffle arrangement of traditional falling film evaporator, utilizes the geometry of variable cross-section twisted oval tube to realize the self-supporting of heat exchanger tube;
(2) due to the mounting structure of special SP spiral elliptic heat exchange tube and no baffle plate, product channels and heat tunnel are alternately formed, and can form strong flow-disturbing, raising heat transfer efficiency;
(3) product and heat medium are in counter-current flow in respective respective channel, and tube pitch and the special helix tube of design produce strong turbulent flow, thus obtain desirable heat energy transmission.
(4) strong heat trnasfer makes product seethe with excitement, and the steam simultaneously generated drives Liquid Residue to form the liquid film upwards climbed, and enters in the steam channel of plate groups.Liquid Residue is separated in the whizzer in downstream with steam.
(5) have certain helix angle between fluid and heat exchanger tube, fluid spiral shape walk around heat-exchanging tube bundle, realize effectively washing away, flow resistance is little, there is not viscous flow dead band and reduces the deposition of dirt;
(6) wide inlet duct and moving upward ensure that and reach ideal distribution on whole cross sections of heat exchanger.
(7) support of heat exchanger tube continuous print helical structure and reduced diameter portion reduces the span of pipe way, the intrinsic frequency of heat exchanger tube is made to avoid the excited frequency of fluid, avoid because of the breakage caused of resonating, thus extend the life-span of equipment, reduce maintenance cost, equipment long-term safety can be run, reach energy-efficient object;
(8) design of variable cross-section twisted oval tube enhances heat-transfer effect, and under equal load is conducted heat, volume can be little by about 30%, decreases manufacturing cost.
Accompanying drawing explanation
Fig. 1 is the structural representation that the utility model little temperature difference shell journey becomes the no baffle plate high-efficiency energy-saving evaporator in space;
Fig. 2 is the structural representation of heat-exchanging tube bundle.
In figure, 1, upper cover; 2, cloth liquid section; 3, housing; 4, shell side steam inlet; 5, heat exchanger tube; 51, arrival end pipe pipeline section; 52, twisted oval tube pipeline section; 53, port of export pipe pipeline section; 6, shell side cooling liquid outlet; 7, shell side drain; 8, lower shell; 9, low head; 10, concentrated solution outlet; 11, separator adapter; 12, separator liquid phase outlet; 13, Membrane Separator Cylinder for CFB Boiler; 14, separator gaseous phase outlet; 15, tube side feed liquid port.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, content of the present utility model is described in further details.
Embodiment:
As shown in Figure 1, little temperature difference shell journey becomes the no baffle plate high-efficiency energy-saving evaporator in space, its entirety is vertical shell-and-tube evaporation structure, this evaporimeter comprises housing 3, upper cover 1, lower shell 8, low head 9, tube sheet and heat-exchanging tube bundle, upper cover 1 is located at the upper end of housing 3, lower shell 8 and low head 9 are located at the lower end of housing 3 successively, tube sheet is provided with two, be located at the junction of upper cover 1 with housing 3 and the junction of lower shell 8 and housing 3 respectively, heat-exchanging tube bundle is located in housing 3, heat-exchanging tube bundle is made up of some heat exchanger tubes 5, the two ends up and down of heat exchanger tube 5 are communicated with tube sheet respectively, heat exchanger tube 5 inner space is tube side, heat exchanger tube 5 space outerpace is shell side, heat exchanger tube 5 is twisted oval tube.The two ends up and down of housing 3 are respectively equipped with shell side steam inlet 4 and shell side cooling liquid outlet 6, upper cover 1 is provided with tube side feed liquid port 15, lower shell 8 connects separator by separator adapter 11, and separator is by Membrane Separator Cylinder for CFB Boiler 13 and the separator gaseous phase outlet 14 and the separator liquid phase outlet 12 that are arranged at Membrane Separator Cylinder for CFB Boiler about 13 two ends.The downside of housing 3 is provided with shell side drain 7, and the lower end of low head 9 is provided with concentrated solution outlet 10.
As shown in Figure 2, heat exchanger tube 5 is divided into three sections, is respectively the twisted oval tube pipeline section 52 playing self-supporting effect of arrival end pipe pipeline section 51, mid portion, and port of export pipe pipeline section 53.Wherein, twisted oval tube pipeline section 52 is after being pressed into oval pipe by round tube, along the axial helicoidal structure reversed by moment of torsion 200 ~ 270Nm of oval pipe.Contacted with each other by the major axis of twisted oval tube pipeline section 52 between adjacent heat exchanger tube 5, form self supporting structure.Triangle or hexagon arrangement is adopted between heat exchanger tube 5.Heat exchanger tube 5 can adopt metal or nonmetallic materials or steel and plastic composite material.
The utility model high-efficiency freezing dehydrator eliminates baffle arrangement, and adopts twisted oval tube, and the flowing of its shell-side fluid is for becoming space longitudinal flow.Tube side is variable cross-section three-dimensional structure, and the flowing of its tube side fluid is for becoming spatially spiral flowing.
The utility model evaporimeter is used for the falling film evaporator in MVR mechanical compression type heat pump, and tube side walks material liquid, and shell side walks high-temperature steam.High-temperature steam enters high-efficiency energy-saving evaporator by shell side steam inlet 4, high-efficiency energy-saving evaporator is flowed out from shell side cooling liquid outlet 6, shell side high-temperature steam designs due to the change space multistory self supporting structure of the twisted oval tube pipeline section 52 of heat exchanger tube 5, flowing situation is for longitudinally becoming spatial flow, efficient hardening conducts heat, and reduces pressure drop.Material liquid enters from tube side feed liquid port 15, first flow through the cloth liquid section 2 between upper cover 1 and housing 3, make material liquid fluid well-distributing be distributed in each heat exchanger tube 5 of evaporimeter, form rotary centrifugal force along spiral heating elliptical tube inside pipe wall, the thin tube wall film of being close to of liquid flows downward.Enter into the heat effect of the steam in shell side from shell side steam inlet 4 outside managing in this process, in heat exchanger tube 5, liquid film comes to life and part evaporation.Moving downward of liquid film is due to gravity and spiral heating elliptical tube centrifugal action at first, and then in pipe, steam constantly generates, and the steam zone hydrodynamic film flowed downward makes it downward motion to be accelerated.In the whizzer in tubulation bottom and downstream thereof, remaining liquid is separated with steam.Concentrate finally flows out high-efficiency falling film evaporation device from concentrated solution outlet 10, the indirect steam with partial concentration liquid produced enters in Membrane Separator Cylinder for CFB Boiler 13 from separator adapter 11 and carries out gas-liquid separation, after separation, liquid exports 12 discharges by separator liquid phase, and steam enters compressor compresses by separator gaseous phase outlet 14 discharge and becomes high heat energy quality steam to enter the circulation of high-efficiency falling film evaporation device.The effect of the arrival end pipe pipeline section 51 of heat exchanger tube 5 is equivalent to forecooler, and twisted oval tube pipeline section 52 and port of export pipe pipeline section 53 are dehydrator.Wherein shell side drain 7 is intended to after work a period of time terminates, discharge the condensed water of non-emptying.
Above-listed detailed description is illustrating for the utility model possible embodiments, and this embodiment is also not used to limit the scope of the claims of the present utility model, does not allly depart from the equivalence that the utility model does and implements or change, and all should be contained in the scope of the claims of this case.

Claims (10)

1. little temperature difference shell journey becomes the no baffle plate high-efficiency energy-saving evaporator in space, it is characterized in that, its entirety is vertical shell-and-tube evaporation structure, described vertical shell-and-tube evaporation structure comprises housing (3), upper cover (1), lower shell (8), low head (9), tube sheet and heat-exchanging tube bundle, described upper cover (1) is located at the upper end of housing (3), described lower shell is arranged between the lower end of housing (3) and low head (9), described tube sheet is provided with two, be located at the junction of upper cover (1) with housing (3) and the junction of lower shell (8) and housing (3) respectively, described heat-exchanging tube bundle is located in housing, described heat-exchanging tube bundle is made up of some heat exchanger tubes (5), the two ends up and down of heat exchanger tube (5) are communicated with corresponding tube sheet respectively, heat exchanger tube (5) inner space is tube side, the shell intracorporeal space of heat exchanger tube (5) outside is shell side, described heat exchanger tube (5) is spirally twisted flat-tube, major axis between adjacent heat exchange tubes (5) contacts with each other to form self supporting structure.
2. little temperature difference shell journey according to claim 1 becomes the no baffle plate high-efficiency energy-saving evaporator in space, it is characterized in that, described heat exchanger tube (5) comprises arrival end pipe pipeline section (51), twisted oval tube pipeline section (52) and port of export pipe pipeline section (53), one end of described arrival end pipe pipeline section (51) and port of export pipe pipeline section (53) is fixedly connected on the two ends of twisted oval tube pipeline section (52) respectively, the other end of described arrival end pipe pipeline section (51) is each passed through upper cover (1) and is communicated with upper cover (1) with the tube sheet of the junction of housing (3), the other end of described port of export pipe pipeline section (53) is communicated with lower shell (8) with the tube sheet of the junction of housing (3) through lower shell (8), the major axis of twisted oval tube pipeline section (52) is relied on to contact with each other between described adjacent heat exchange tubes (5).
3. little temperature difference shell journey according to claim 2 becomes the no baffle plate high-efficiency energy-saving evaporator in space, it is characterized in that, described twisted oval tube pipeline section (52) is after being pressed into oval pipe by round tube, along the axial helicoidal structure reversed by moment of torsion 200 ~ 270Nm of oval pipe.
4. little temperature difference shell journey according to claim 2 becomes the no baffle plate high-efficiency energy-saving evaporator in space, it is characterized in that, described arrival end pipe pipeline section (51), twisted oval tube pipeline section (52) and port of export pipe pipeline section (53) are one-body molded.
5. the little temperature difference shell journey according to any one of claim 1-4 becomes the no baffle plate high-efficiency energy-saving evaporator in space, it is characterized in that, adopts triangle or hexagon or square to arrange between described heat exchanger tube (5).
6. little temperature difference shell journey according to claim 1 becomes the no baffle plate high-efficiency energy-saving evaporator in space, it is characterized in that, the upper and lower both sides of described housing (3) are respectively equipped with shell side steam inlet (4) and shell side cooling liquid outlet (6), and described shell side steam inlet (4) is all connected with shell side with shell side cooling liquid outlet (6).
7. little temperature difference shell journey according to claim 1 becomes the no baffle plate high-efficiency energy-saving evaporator in space, it is characterized in that, described upper cover (1) and low head (9) are provided with a tube side feed liquid port (15) and concentrated solution outlet (10), and described tube side feed liquid port (15) is connected with lower shell (8) with upper cover (1) respectively with concentrated solution outlet (10).
8. little temperature difference shell journey according to claim 1 becomes the no baffle plate high-efficiency energy-saving evaporator in space, it is characterized in that, the side of described lower shell (8) is connected with separator by separator adapter (11).
9. little temperature difference shell journey according to claim 8 becomes the no baffle plate high-efficiency energy-saving evaporator in space, it is characterized in that, described separator comprises Membrane Separator Cylinder for CFB Boiler (13) and is arranged at Membrane Separator Cylinder for CFB Boiler (13) upper/lower terminal separator gaseous phase outlet (14) and separator liquid phase outlet (12).
10. little temperature difference shell journey according to claim 1 becomes the no baffle plate high-efficiency energy-saving evaporator in space, and it is characterized in that, the downside of described housing (3) is provided with a shell side drain (7) be connected with shell side.
CN201520337995.0U 2015-05-21 2015-05-21 Little temperature difference shell journey becomes the no baffle plate high-efficiency energy-saving evaporator in space Active CN204723782U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112274956A (en) * 2020-10-19 2021-01-29 扬州大学 Falling film evaporator and falling film evaporation method thereof
CN113494856A (en) * 2020-03-20 2021-10-12 中国科学院广州能源研究所 Vertical falling film evaporation type condenser
CN113494857A (en) * 2020-03-20 2021-10-12 中国科学院广州能源研究所 Vertical falling film efficient condenser

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113494856A (en) * 2020-03-20 2021-10-12 中国科学院广州能源研究所 Vertical falling film evaporation type condenser
CN113494857A (en) * 2020-03-20 2021-10-12 中国科学院广州能源研究所 Vertical falling film efficient condenser
CN112274956A (en) * 2020-10-19 2021-01-29 扬州大学 Falling film evaporator and falling film evaporation method thereof

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