CN204115532U - A kind of vertical type evaporator - Google Patents

A kind of vertical type evaporator Download PDF

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Publication number
CN204115532U
CN204115532U CN201420557076.XU CN201420557076U CN204115532U CN 204115532 U CN204115532 U CN 204115532U CN 201420557076 U CN201420557076 U CN 201420557076U CN 204115532 U CN204115532 U CN 204115532U
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Prior art keywords
heat exchanger
exchanger plates
heat
vertical type
evaporator
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CN201420557076.XU
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Inventor
李凤清
王敏
孙苑洱
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THP ENGINEERING TECHNOLOGY (SHANGHAI) Co Ltd
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THP ENGINEERING TECHNOLOGY (SHANGHAI) Co Ltd
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Abstract

The utility model relates to a kind of vertical type evaporator, heat exchange element in this evaporimeter is pillow formula heat transfer element, this pillow formula heat transfer element comprises multipair heat exchanger plates to the plate halved tie formed, and control the fixture of each heat exchanger plates to spacing, described heat exchanger plates to being formed the parts of plate journey cavity that can circulate for heat exchanging fluid by multi-point welding by two pieces of metallic plates, each exchange hot plate between and and evaporator shell between form shell side cavity; Fluid limp journey cavity to be evaporated, hot fluid walks shell side cavity, carries out heat exchange.Compared with prior art, the utility model has the advantages such as structural adjustment is flexible, heat exchange efficiency is high, cost is low, easy to clean.

Description

A kind of vertical type evaporator
Technical field
The utility model relates to a kind of vertical type evaporator, especially relates to a kind of high-efficiency vertical evaporimeter.
Background technology
The general cold and hot fluid of evaporation process all produces phase transformation, and solution to be evaporated have during the course easily have crystallization, easily fouling, produce foam, viscosity B coefficent is large, be corrosive, the characteristics such as boiling point change, so these factors of the careful consideration of Choice and design process need of form evaporator.
Judge that a key factor of performance of evaporator quality is exactly the size of heat exchange area in unit volume, the heat exchange area in unit volume is larger, and the treating capacity of evaporimeter is larger, and therefore augmentation of heat transfer is just as one of enhanced water evaporation device performance very important means.In order to strengthen flow disturbance, promote heat convection, the unevenness on evaporimeter boiling surface the most easily produces the nucleus of boiling, and therefore, pit is many, and the nucleus of boiling is many, and heat exchange will be strengthened.The research of enhanced boiling heat transfer in recent decades mainly increases surface crater, there are the means that two kinds conventional at present: (1) forms loose structure, such as tube with high flux heat exchanger with the physics such as sintering, soldering, flame-spraying, ionization deposition and chemical means on heat exchange surface.(2) machining process.In these methods, although can enhanced heat exchange largely, based on the special nature of evaporated liquor, because runner circulation is lower, easily there is the phenomenons such as fouling and non-easy cleaning; Meanwhile, use the tube with high flux heat exchanger that the methods such as sintering manufacture, although heat exchange efficiency is higher, the material restriction of manufacture craft, expensive; In addition, in general evaporation process, the temperature of evaporated liquor is lower than boiling temperature, therefore evaporimeter comprises preheating section and evaporator section, desirable evaporimeter should shorten preheating section as far as possible, takes into account heat transfer and pressure drop simultaneously, but heat transfer and a pressure drop paradox often, this just needs device structure to have adjustability flexibly, can find an equalization point in heat transfer and pressure drop.The special design of existing form evaporator surface all result in fluid-pressure drop and greatly raises, and the flexibility of these device structures is lower, can not adjust according to the change of operating mode.
In addition, gravity acceleration g has a significant impact heat transfer free convection.Nusselt number Nu is the accurate number characterizing heat convection intensity, and Nu larger expression heat convection is stronger, and its expression formula is as follows:
Nu=f(Gr,Pr)
Wherein, so Nu is directly proportional to gravity acceleration g.
Therefore, heat exchange is strengthened.For heat exchanger form, conventional shell and tube evaporator is horizontal, and this just reduces heat exchange efficiency in form.
Summary of the invention
The purpose of this utility model is exactly provide that a kind of structural adjustment is flexible, heat exchange efficiency is high, cost is low, the vertical type evaporator of easy to clean to overcome defect that above-mentioned prior art exists.
The purpose of this utility model can be achieved through the following technical solutions: a kind of vertical type evaporator, it is characterized in that, heat exchange element in this evaporimeter is pillow formula heat transfer element, this pillow formula heat transfer element comprises the plate halved tie of multipair heat exchanger plates to composition, and control the fixture of each heat exchanger plates to spacing, described heat exchanger plates to being formed the parts of plate journey cavity that can circulate for heat exchanging fluid by multi-point welding by two pieces of metallic plates, each heat exchanger plates between and and evaporator shell between form shell side cavity; Fluid limp journey cavity to be evaporated, hot fluid walks shell side cavity, carries out heat exchange.
Each exchange hot plate is evenly protruding to making planar section due to spot welding, and interior outside all defines contact, and contact density, according to climatic conditioning, carries out disturbance to fluid.
Described evaporimeter also comprises expansion joint and housing, and the plate halved tie of described multipair heat exchanger plates to composition is arranged in housing, and described expansion joint is arranged on multipair heat exchanger plates to one end.
Described heat exchanger plates is evenly provided with multiple solder contacts formation pillow formula heat exchanger to upper.
Described multiple solder contacts are crisscross arranged, and the contact density of conventional operating mode is 200 ~ 5000/m 2, contact spacing is generally 20 ~ 100mm, also can adjust up and down, manufacturing process all can reach under some special operation conditions require.
Described fixture be used for by plate between distance controlling in the specific distance designed by working condition requirement, by plate to compact the fixing of outward flange, and do not go deep into inside plate bundle, can not on shell-side fluid be formed baffling or flow-disturbing impact.
Spacing between two pieces of metallic plates of heat exchanger plates halved tie self and the spacing between heat exchanger plates halved tie are all require to regulate according to fluid flow, drop requirements and physical properties of fluids clean-up performance under various operating mode etc.
Described base of evaporator is provided with liquid inlet to be evaporated, and top is provided with process steam outlet, and sidewall is provided with gas access, hot side, hot side gas and condensate outlet; Liquid to be evaporated enters evaporator plate journey cavity by the liquid inlet to be evaporated of base of evaporator, heat exchange is carried out with the hot fluid entering shell side cavity from gas access, hot side, process gas after evaporation flows out from the outlet of top process steam, and hot fluid is discharged by hot side gas and condensate outlet after heat exchange.
Described expansion joint is bellows expansion joint, is a kind of elastic compensation element of energy free-extension, effectively can plays the effect of compensating axial distortion; When heat exchanger plates halved tie and housing are out of shape inconsistent due to the temperature difference and pressure effect, can absorb deformation energy, automatic adjustment housings and heat exchanger plates are to intrafascicular stress intensity.
In the utility model evaporimeter, liquid material to be evaporated axially enters evaporator plate journey cavity by base of evaporator, and the contact of evenly gathering between the plate due to heat exchanger plates halved tie strengthens the disturbance of liquid, increases heat exchange efficiency; Contact and projection provide the nucleus of boiling for liquid evaporation simultaneously, accelerate boil-off rate.Hot fluid walks shell side cavity, equally due to the disturbance of contact between plate pair, makes liquid reach the state of turbulent flow, adds heat exchange efficiency.Be exactly total process strengthen the turbulence of two side liquids, increase heat exchange efficiency.
The utility model make use of plate version flexibly, according to the flow of two side liquids, can seek optimum structure parameter to reach best heat transfer effect by adjustable plate spacing, contact density, plate to line space design.Select shell side and plate journey passage flexibly according to both sides fluid behaviour, take into full account heat exchange (the need of boiling again), pressure drop and be convenient to the requirement of cleaning.
Compared with prior art, the utility model has the following advantages:
One, surface irregularity, adds the nucleus of boiling;
Contact and rough surface are that liquid evaporation provides the nucleus of boiling, and unevenness is more, and the nucleus of boiling is more, and heat exchange more can be strengthened.
Two, sheet structure parameter can flexible modulation;
According to different working condition requirements, can flexible modulation distance between plates, plate to spacing and contact density, reach heat transfer effect in various degree.Select shell side and plate journey passage flexibly according to both sides fluid behaviour, take into full account heat exchange (the need of boiling again), pressure drop and be convenient to the requirement of cleaning.
Three, heat exchange efficiency is high, saves occupation area of equipment;
Owing to having contact between plate, the disturbance of energy larger fluid, makes the liquid form of liquid be turbulence state, greatly enhances heat transfer.Simultaneously for the fluid having gaseous state, the uneven cavity between plate pair can strengthen the disturbance of gas, increases gassiness side heat exchange (gas heat-transfer efficiency is general lower) largely.Higher heat exchange efficiency, means that the heat exchange area needed for heat transfer effect reaching same is less, not only reduces the floor space of equipment like this, decrease the difficulty of the installation of equipment, maintenance clean etc. equally.
Four, gas pressure drop is reduced largely;
Because total is more penetrating, and according to fluid flow and medium physical property adjustment fluid passage, can reach very low pressure drop.Be specially adapted to the operating mode that gas-liquid flow difference is larger.
Five, less scaling, disassembly, cleaning are convenient;
Because contact exists, and fluid liquid form is turbulent flow, produces boundary shear stress thus comparatively large, makes heat exchanger itself have self-cleaning function; In addition, after using even if long-time, had fouling to a certain degree, whole heat exchanger plates bundle can take apart and clean from housing, and shell side spacing is comparatively large, and cleaning easily.
Accompanying drawing explanation
Fig. 1 is the front partial structurtes schematic diagram of the utility model pillow formula heat exchange element;
Fig. 2 is the side partial structurtes schematic diagram of the utility model pillow formula heat exchange element;
Fig. 3 is the overall structure schematic diagram of the utility model high efficiency plate vertical type evaporator;
In Fig. 1,2 shown in label:
A, sheet surface, cavity between b, plate, c, solder contacts;
In Fig. 3 shown in label:
E1, process liquid entrance to be evaporated, E2, process gas outlet, E3, gas access, hot side, E4, hot side gas and condensate outlet;
1. heat exchanger plates halved tie, 2. housing, 3., sewage draining exit, 4., fixture, 5., expansion joint.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Embodiment
As shown in Figures 1 to 3, a kind of vertical type evaporator, evaporimeter comprise heat exchange element, expansion joint 5. with housing 2., heat exchange element in this evaporimeter is pillow formula heat transfer element, by multipair heat exchanger plates to the plate halved tie formed 1. this pillow formula heat transfer element comprises, and control each heat exchanger plates to the fixture of spacing 4., described multipair heat exchanger plates to be arranged on housing 2. in, 5. described expansion joint is bellows expansion joint, usually heat exchanger plates halved tie lower end is arranged on, it is a kind of elastic compensation element of energy free-extension, effectively can play the effect of compensating axial distortion.When heat exchanger plates halved tie and housing are out of shape inconsistent due to the temperature difference and pressure effect, can absorb deformation energy, automatic adjustment housings and heat exchanger plates are to intrafascicular stress intensity.Described heat exchanger plates is to being the parts being formed the plate journey cavity b that can circulate for heat exchanging fluid by two pieces of metallic plates by multi-point welding, and described heat exchanger plates is evenly provided with multiple solder contacts c formation pillow formula heat exchanger to upper.Described multiple solder contacts are crisscross arranged, and the contact density of conventional operating mode is 200 ~ 5000/m 2, contact spacing is generally 20 ~ 100mm, also can adjust up and down, manufacturing process all can reach under some special operation conditions require.Contact density is 3000/m in the present embodiment 2, contact spacing is generally 35 ~ 40mm.
Each heat exchanger plates is evenly protruding to making planar section due to spot welding, and in sheet surface a, outside all defines contact, and contact density, according to climatic conditioning, carries out disturbance to fluid.1. and form shell side cavity between evaporator shell heat exchanger plates halved tie; Described fixture be used for by plate between distance controlling in the specific distance designed by working condition requirement, by plate to compact the fixing of outward flange, and do not go deep into inside plate bundle, can not on shell-side fluid be formed baffling or flow-disturbing impact.
Heat exchanger plates to the spacing between self two pieces of metallic plates and heat exchanger plates between spacing be all require to regulate according to fluid flow, drop requirements and physical properties of fluids clean-up performance under various operating mode etc.
Described base of evaporator is provided with liquid inlet E1 to be evaporated, and top is provided with process gas outlet E2, and sidewall is provided with hot side gas access E3, hot side gas and condensate outlet E4; Liquid to be evaporated enters evaporator plate journey cavity by the process liquid entrance E1 to be evaporated of base of evaporator, countercurrent heat exchange is carried out with the hot fluid entering shell side cavity b from hot side gas access E3, if lower than boiling temperature when evaporating liquid enters heat exchanger, then first carry out preheating, evaporate after reaching boiling temperature; If evaporated liquor import is boiling temperature, then namely start heat exchange evaporation after entering, the gas of evaporation or gas-liquid mixture are discharged by process gas outlet E2 mouth, and gas-liquid mixture outlet enters gas-liquid separator again and is separated; Hot side gas (or comprising partial condensation liquid) is discharged by hot side gas and condensate outlet E4 mouth after heat exchange.Under some special operation conditions, cold-side fluid needs to boil again, and this kind of operating mode can according to the channel selecting of both sides fluid properties alter in shell side and plate journey.Due in whole process, the difference of fluid temperature (F.T.), is usually equipped with expansion joint in the side that the entrance temperature difference is larger and 5. eliminates extra heat stress.This completes whole evaporation and heat-exchange process.Meanwhile, 3. housing bottom sidewall is also provided with sewage draining exit.
Liquid material to be evaporated axially enters evaporator plate journey cavity (plate journey) by base of evaporator, because the contact of evenly gathering between the plate that heat exchanger plates is right strengthens the disturbance of liquid, increases heat exchange efficiency; Contact and projection provide the nucleus of boiling for liquid evaporation simultaneously, accelerate boil-off rate.Hot fluid walks shell side cavity (shell side), equally due to the disturbance of contact between plate pair, makes liquid reach the state of turbulent flow, adds heat exchange efficiency.Be exactly total process strengthen the turbulence of two side liquids, increase heat exchange efficiency.
The utility model make use of plate version flexibly, according to the flow of two side liquids, can seek optimum structure parameter to reach best heat transfer effect by adjustable plate spacing, contact density, plate to line space design.Select shell side and plate journey passage flexibly according to both sides fluid behaviour, take into full account heat exchange (the need of boiling again), pressure drop and be convenient to the requirement of cleaning.

Claims (6)

1. a vertical type evaporator, it is characterized in that, heat exchange element in this evaporimeter is pillow formula heat transfer element, this pillow formula heat transfer element comprises the plate halved tie of multipair heat exchanger plates to composition, and control the fixture of each heat exchanger plates to spacing, described heat exchanger plates to being formed the parts of plate journey cavity that can circulate for heat exchanging fluid by multi-point welding by two pieces of metallic plates, each heat exchanger plates between and and evaporator shell between form shell side cavity.
2. a kind of vertical type evaporator according to claim 1, is characterized in that, described evaporimeter also comprises expansion joint and housing, and the plate halved tie of described multipair heat exchanger plates to composition is arranged in housing, and described expansion joint is arranged on multipair heat exchanger plates to one end.
3. a kind of vertical type evaporator according to claim 1, is characterized in that, described heat exchanger plates is evenly provided with multiple solder contacts formation pillow formula heat exchanger to upper.
4. a kind of vertical type evaporator according to claim 3, is characterized in that, described multiple solder contacts are crisscross arranged, and contact density is 200 ~ 5000/m 2, contact spacing is generally 20 ~ 100mm.
5. a kind of vertical type evaporator according to claim 2, is characterized in that, described base of evaporator is provided with liquid inlet to be evaporated, and top is provided with process steam outlet, and sidewall is provided with gas access, hot side, hot side gas and condensate outlet.
6. a kind of vertical type evaporator according to claim 2, is characterized in that, described expansion joint is bellows expansion joint, is a kind of elastic compensation element of energy free-extension.
CN201420557076.XU 2014-09-25 2014-09-25 A kind of vertical type evaporator Active CN204115532U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420557076.XU CN204115532U (en) 2014-09-25 2014-09-25 A kind of vertical type evaporator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publications (1)

Publication Number Publication Date
CN204115532U true CN204115532U (en) 2015-01-21

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104236350A (en) * 2014-09-25 2014-12-24 德艾柯工程技术(上海)有限公司 Vertical type evaporator
CN105258536A (en) * 2015-10-13 2016-01-20 德艾柯工程技术(上海)有限公司 Novel all-welding plate shell type heat exchanger

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104236350A (en) * 2014-09-25 2014-12-24 德艾柯工程技术(上海)有限公司 Vertical type evaporator
CN105258536A (en) * 2015-10-13 2016-01-20 德艾柯工程技术(上海)有限公司 Novel all-welding plate shell type heat exchanger

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C14 Grant of patent or utility model
GR01 Patent grant
CB03 Change of inventor or designer information

Inventor after: Li Fengqing

Inventor after: Sun Yuaner

Inventor before: Li Fengqing

Inventor before: Wang Min

Inventor before: Sun Yuaner

Inventor after: Li Fengqing

Inventor after: Sun Yuaner

Inventor before: Li Fengqing

Inventor before: Wang Min

Inventor before: Sun Yuaner

COR Change of bibliographic data

Free format text: CORRECT: INVENTOR; FROM: LI FENGQING WANG MIN SUN YUANER TO: LI FENGQING SUN YUANER

C53 Correction of patent for invention or patent application
CB03 Change of inventor or designer information
CB03 Change of inventor or designer information

Inventor after: Sun Yuaner

Inventor before: Li Fengqing

Inventor before: Sun Yuaner