CN102862038A - Preparation method of medium- and high-pressure plate heat exchanger and device - Google Patents

Preparation method of medium- and high-pressure plate heat exchanger and device Download PDF

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Publication number
CN102862038A
CN102862038A CN2012103361017A CN201210336101A CN102862038A CN 102862038 A CN102862038 A CN 102862038A CN 2012103361017 A CN2012103361017 A CN 2012103361017A CN 201210336101 A CN201210336101 A CN 201210336101A CN 102862038 A CN102862038 A CN 102862038A
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heat exchange
exchange element
welding
tube
preparation
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张培洲
邵珲
张舒
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JIUJIANG JIUZHOU ENERGY-SAVING ENVIRONMENTAL PROTECTION ENGINEERING CO LTD
ENERGY-SAVING ENVIRONMENTAL PROTECTION ENGINEERING CO LTD LANZHOU
Original Assignee
JIUJIANG JIUZHOU ENERGY-SAVING ENVIRONMENTAL PROTECTION ENGINEERING CO LTD
ENERGY-SAVING ENVIRONMENTAL PROTECTION ENGINEERING CO LTD LANZHOU
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Priority to CN2012103361017A priority Critical patent/CN102862038A/en
Publication of CN102862038A publication Critical patent/CN102862038A/en
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Abstract

The invention relates to a preparation method of an evaporation element-heat exchange element of a plate evaporator which is prepared by a welding method with the work pressure of a plate stroke being within 1.0MPa to 10.0MPa, and a heat exchange element prepared by the method and an evaporation device. The preparation method of the heat exchange element comprises the steps of: first, forming a peripherally welded hollow element by the peripheries of two plates by laser welding; then, cutting part of a welding channel, arranging two sections of tube nodes respectively in a part without the welding channel and welding to from a steam inlet tube and a condensed water outlet tube; then, welding an array consisting of a plurality of ring-shaped welding channels by laser winding on a plane of the hollow element according to the array determined by design requirements; and welding the upper and lower plates together at the ring-shaped welding channel, and then introducing high pressure water among plates of the hollow element to expand and form, so as to prepare the heat exchange element.

Description

A kind of preparation method of middle high-pressure plate type heat exchanger and device
Technical field
The present invention relates to a kind of preparation method of plate-type heat-exchange equipment, particularly plate journey operating pressure is in the preparation method of the evaporation element-heat exchange element of the plate-type evaporator between the 1.0Mpa-10.0Mpa, and heat exchange element and the vaporising device of in this way preparation.Preparation method of the present invention still belongs to a kind of method made from welding.
Background technology
Plate-type evaporator is one of low pressure evaporation concentration equipment of a kind of advanced person, it is present more advanced evaporation concentration equipment in the world, introduce China so far since the end of the eighties in last century, go through continuous upgrading perfect, be widely used in various industrial circles, to satisfy the needs of each industrial circle technological process of production.In the last few years, because the developing rapidly and the environmental requirement of various countries' energy-saving and emission-reduction of the industries such as the recovery of paper industry alkali and food, medicine, beverage, beer, the application of plate-type evaporator was more extensive.
Although other evaporation equipments such as plate-type evaporator and tubular evaparator compare efficient height, it is simple to use, clean the plurality of advantages such as easy to maintenance, but, its range of application still is very restricted, still mainly use tubular evaparator in the situation that bear middle and high pressure, the shortcoming that its main cause is that the plate type heat exchanging element bearing capacity that causes of the reason of the structure of plate-type evaporator and manufacturing process is not high, poor reliability etc. can't overcome.The operating pressure of normally used plate-type evaporator generally is no more than 0.6Mpa, limit bearing capacity can not surpass 1.0Mpa yet, and in use because effects such as the vibration of gas, steam hammer impacts, easily cause the failure modes such as solder joint cracking, periphery breakage to occur, the equipment dependability is relatively poor.The reason that causes above phenomenon is that the pressure-bearing of traditional plate-type evaporator and the core parts of heat exchange are the preparation method of heat exchange element.
Existing plate type heat exchanging element preparation method adopts the weldering of argon shield weld seam with the light sheet material edge of two same size specifications first; forming four side welds closes and the element of hollow; weld again a water inlet pipe; then send in the moulding mould special; the cylindrical pressure head that equidistant layout is arranged on the mould; tightly two thin plates are forced together; again to the middle water filling pressurization of two plates; in the constraint local deformation of the cylindrical pressure head of upper/lower die contact site; other parts are in addition swelled by bulging, form streamlined cavity surface.Control solid carbon dioxide and divide after moulding, the part that more cylindrical pressure head is compressed is welded with mash welder, makes it in the course of the work the solder joint place and can bear certain pressure and unlikely opening.Aperture position and the physical dimension followed by designing requirement cut open certain seam place all around again, and expand and an opening, the header that welding is used for passing into steam and discharges condensed water is pressed designing requirement again with each heating element heater seam of the some of opening, forms heat exchanger.
For improving the plate type heat exchanging element bearing capacity, the main method and the approach that now adopt roughly have three kinds, one, reduce the spacing of spot welding point, this is easy to be verified theoretically, just mean the quantity that increases spot welding point because reduce the spacing of spot welding point, if the bearing capacity of each spot welding point is identical, spot welding point quantity means that at most bearing capacity is strong so; Its two, increase the diameter of spot welding point because the outermost at the circular weld interface that the position of spot welding point actual loading is exactly welding in fact to be formed, diameter greatly just means the part of the force prolongation; Its three, change admission and the condensed water water-out manners of heat exchange element, improve the structure bearing capacity.But with regard to practical condition, admission and this way of condensed water water-out manners of the heat exchange element that only changes are practical, and front two kinds of ways all are difficult to realize in actual production process.Aforementioned two kinds of existing problems of technical measures are:
One, the solder joint that adopts resistance spot welding structure and welding manner to form becomes the critical section in the evaporimeter
The welding manner of spot welding is a kind of of pressure electric resistance welding during the welding heat exchange element, its welding process roughly is divided into: 1, welding electrode moves workpiece is firmly compressed up and down, 2, two electrode discharges, two plates that overlap are melted from contact position, continuous discharge is until the whole thickness of two plates melts 3, electrode stops discharge, continue to guarantee impaction state substantially, two plates that are discharged fusing are bonded together, form weld seam.Be not difficult to find out, in an evaporimeter, it is an as cast condition form to number in essence in necessarily some welding line, in its welding process because the pressure-acting of upper/lower electrode, after being discharged fusing, steel are extruded distortion and local reduction, because the sudden change of local shape can form area of stress concentration, simultaneously, the heat-affected zone area that spot welding causes is larger, makes these solder joint places become the weakest part in the whole evaporimeter.
Two, the spot welding point spacing can not be adjusted
Different spot pitch just means need to different moulds, and the spacing that changes spot welding point just need to be made a large amount of bulging moulds again, so that the processing of forming machine, maintenance cost are multiplied, cause product economy and greatly reduces.Because limitation and production efficiency that mould is made, the interval of cylindrical pressure head pressing section is immovable generally speaking.
Three, increasing the spot welding point diameter can't realize
The diameter that increases spot welding point just means that welding energy consumption increases, because welding energy is and square being directly proportional of spot welding point radius, the spot welding point diameter that present mash welder can weld can not surpass 8mm yet, as increasing again, then need research and development and be equipped with powerful welding machine, existing factory distribution system capacity also can't satisfy, and does not more meet scientific and technological progress and energy-saving and cost-reducing social situations.
Four, there is fault of construction in the mode that adopts the argon shield weldering to stitch weldering all around of heat exchange element
After this welding manner welding that prior art adopts, the weldering meat of welding point part is weak, and intensity own is not high, force way is the flexure stress of alternation in addition, be easy to cause endurance failure, when the inner pressurized of plate, peripheral edge sealing welding seam part divides very easily to be torn simultaneously.
For above-mentioned reasons, use the bearing capacity of the resulting plate-type evaporator heat exchange element of prior art that further raising can not be arranged, form the bottleneck that plate type heat exchanger uses.
Summary of the invention
The invention provides a kind of preparation method that can solve the mesohigh plate type evaporating apparatus of the deficiency that prior art exists, and prepared device.
In of the present invention, the preparation method of the heat exchange element of high-pressure plate type vaporising device is: at first the periphery with two plates adopts the laser welded seam weldering to form the hollow component of a peripheral seam, then cut the part welding bead at water inlet position and the water exit position of hollow component respectively by designing requirement, again two sections tube couplings are arranged at respectively the part that cuts welding bead, with the welding of tube coupling outer wall and plate and make the inner internal communication with two plates of tube coupling, form respectively steam inlet tube and condensating water outlet tube, the array of determining by designing requirement on the hollow component plane again welds the array that is comprised of a plurality of ring shape welding beads with laser, and incite somebody to action up and down two plate seam together at cast welding bead place, eliminate again the processing of welding stress, then water under high pressure is sent into by steam inlet tube and condensating water outlet tube and entered the bulging moulding in the hollow component, make heat exchange element.
Adopt the heat exchange element of method preparation of the present invention, because be to utilize Laser Welding, the width of its peripheral welding bead can be regulated, and more than can welding together, can greatly improve the lear energy between plate.Secondly, the present invention be first with Laser Welding weld the ring shape welding bead up and down two plates and adjust with width is as easy as rolling off a log with the diameter of these ring shape welding beads in local seam, so can increase easily the lifting surface area at solder joint place, improve its tension stress.The 3rd, the present invention welds first to carry out cripling deformation again, and deformation is to form by fluid power, and without the External Force Acting of mould pressure head, so its distortion will be more more even than prior art, the zone that can basically not exist stress to concentrate in deformation process.Simultaneously, because the Laser Welding welding bead is narrow, welding energy is little, and the heat-affected zone that welding forms is also less, so that the material stressing conditions is greatly improved.
Heat exchange element with preparation method's preparation of the heat exchange element of mesohigh plate type evaporating apparatus of the present invention, it is characterized in that the welding bead that has seam weldering at least is arranged in the periphery of heat exchange element, serve as reasons the one by one bulge and one by one by the ring shape welding interface with streamlined appearance that the array that forms consists of of caving in of the interface of heat exchange element.The present invention is owing to adopting the seam weldering to form at least one welding bead in two plate peripheries of its heat exchange element; it is more reasonable that the welding region that this welding bead adopts the weldering of argon shield weld seam to form than the lateral edge around the sheet material of prior art is accepted mode; make original flexural loading change into the effect of tension power, so its anti-Zhang Du is greater than the anti-Zhang Du of the welding bead of prior art formation.
Middle high-pressure plate type evaporating apparatus of the present invention, by housing, be arranged at that evaporative medium chamber, distributor, demister, indirect steam discharge connection, evaporative medium entrance, condensation-water drain that heat exchange element on the mounting bracket in the housing, space between heat exchange element consist of are taken over and the steam inlet is taken over and formed, wherein used heat exchange element is the heat exchange element with method of the present invention preparation, i.e. serve as reasons one by one bulge and weld the interface with streamlined appearance that array of depressions forms by ring shape one by one of the interface of heat exchange element.
In the middle high-pressure plate type evaporating apparatus of the present invention, the steam inlet tube on its each heat exchange element and condensating water outlet tube location interval layout, namely the steam inlet tube of two adjacent heat exchange elements and condensating water outlet tube are arranged at respectively both direction.Can save the space like this, when overcoming steam inlet tube on all heat exchange elements and condensating water outlet tube and all being arranged at the same side, take the deficiency in larger space.Also so that evaporative medium is mobile more smooth and easy, the installation and maintenance space is strengthened.
The present invention can solve the deficiency that prior art exists fully, can greatly improve the bearing capacity of plate type evaporating apparatus.
Description of drawings
Accompanying drawing 1 adopts the schematic diagram of laser edge bonding welding for heat exchange element of the present invention four limits.
Accompanying drawing 2 is the schematic diagram of heat exchange element excision local welding edge sealing of the present invention.
The schematic diagram of accompanying drawing 3 after for heat exchange element of the present invention welding steam inlet, condensation-water drain seamless steel pipe.
Accompanying drawing 4 adopts schematic diagram behind the laser weld pressure-bearing solder joint for heat exchange element of the present invention.
Accompanying drawing 5 is the local enlarged diagram of heat exchange element laser weld circle array of the present invention.
Accompanying drawing 6 is accompanying drawing 5 cross section cut-away illustration.
Accompanying drawing 7 is the schematic cross-section after the heat exchange element bulging of the present invention moulding.
Accompanying drawing 8 is mesohigh plate-type down-film evaporator overall structure cross-sectional schematic of the present invention.
Accompanying drawing 9 is the left apparent place schematic diagram of accompanying drawing 8.
Among the figure: 1 is the circulation fluid outlet, and 2 are the condensation-water drain adapter, and 3 is the vapour-liquid mixing tube, 4 is inspection manhole, and 5 is the heat exchange element mounting bracket, and 6 is apparatus casing, 7 is heat exchange element, and 8 is distributor, and 9 is the distributor mounting bracket, 10 are the steam inlet adapter, and 11 is demister, and 12 is the indirect steam outlet, 13 is the circulation fluid entrance, and 14 is the steam inlet seamless steel pipe, and 15 is distributor bottom, 16 is the condensation-water drain seamless steel pipe, and 17 is the fixed gas discharge connection.
The specific embodiment
The present invention explains orally below in conjunction with drawings and Examples.
Heat exchange element preparation method of the present invention is as follows:
At first coiled strip is corrected the plate that cuts into the same size specification after smooth.Two plates are superimposed together, then the periphery all around along plate adopts the mode of laser weld to be got up with the thin welding bead soldering and sealing of straight line in four limits, forms four side welds and closes and the element of hollow, referring to accompanying drawing 1 again.The workpiece weld seam that so forms in use main force way is the bearing tension effect, because the change of force way has improved the load ability, has increased equipment dependability.The welding bead that simultaneously the present invention forms is owing to being a fine line, so electric quantity consumption is little when welding, energy-saving effect is obvious.Be also shown in by Fig. 1, adopted the weldering of two welding bead seam among the present invention around plate, this can further improve the reliability of equipment.
After finishing last operation, again will be around the long limit two ends soldering and sealing welding bead of soldering and sealing two plates remove a part by instructions for use or designing requirement cutting, the part that cuts is seen Fig. 2 as admission and condensation-water drain use.
Again processing belt seamless steel pipe tube coupling jaggy outer wall and plate are welded on the position that welding bead is removed in cutting, make the internal communication of tube coupling inside and two plates, form respectively steam inlet tube and condensation-water drain, referring to Fig. 3, the local little figure at the right little angle of Fig. 3 is the generalized section of outlet pipe part.
And then according to requirements determine heat exchange element spot size and spacing, and will be placed into by the plate that the front operation was processed laser welder and carry out the solder joint welding, the solder joint that welds is a circle, forms pad array as shown in Figure 4.This processing method of the present invention is not subjected to the constraint of mould and resistance welder, so the spacing between each solder joint and solder joint diameter of a circle can be adjusted arbitrarily.By reducing spot pitch or increasing the use bearing capacity that the solder joint diameter of a circle can improve heat exchange element greatly.The welding bead that the present invention adopts laser weld to form is fine rule, so the welding spot structure that forms is a circle fine rule circle welding bead, its inside still keeps the material original form, and solder joint inside need not whole fusion, both reduced energy consumption, the heat affected area that welding is caused reduces greatly.Calculate to calculate by theory, when spot pitch is adjusted into 50mm, when spot size is adjusted into ¢ 20mm, the theoretical bearing capacity of heat exchange element can reach 10.0Mpa.Welding spot structure of the present invention is referring to accompanying drawing 5 and accompanying drawing 6.After finishing the solder joint welding, will weld complete heat exchange element and adopt the mechanical system rectification smooth, and eliminate the processing of welding stress and deformation, as carry out the timeliness vibrations and process.
Send heat exchange element to hydraulic pressure bulging forming machine and carry out the bulging operations for forming.The mouth of pipe of shutoff this moment heat exchange element one side slowly injects water under high pressure, under the effect of waterpower from another side pipe, along with hydraulic pressure raises, reach gradually the yield strength of material, heat exchange element two plates leave mutually, swell to both sides, hydraulic pressure constantly raises, and bump height constantly increases, and forms the cavity with certain altitude, but, under the acting in conjunction of upper and lower mould and straight line welding bead, be close together around the heat exchange element, can not be swelled by waterpower.In like manner, owing to being subject to the constraint of each circle solder joint, two plates at the solder joint place still are close together, can not be swelled by waterpower, such two plates are swelled the part of final Formation cross-section such as Fig. 7, other parts still be close together by bulge one by one and the one by one streamlined appearance that consists of of the array that forms of depression, i.e. heat exchange element.Method of the present invention and traditional processing mode difference are to need not tightly to push down the spot welding point position with the cylindrical pressure head on the upper/lower die again, but make it fully free, only the soldering and sealing position uses upper/lower die tightly to push down around heat exchange element, retrains its peripheral wrinkling distortion.So just need not a large amount of cylindrical pressure heads that use again, greatly simplified the structure of forming machine, make its annex minimizing, simple in structure, easy to maintenance, use cost also reduces greatly.
By accompanying drawing 3 as seen, steam inlet and condensation-water drain independently are set on each heat exchange element among the present invention, can realize monolithic assembling, dismounting and the replacing of heat exchange element, overcome and solved deficiency and the defective of existing composition form fully, simultaneously, because steam inlet, condensation-water drain all adopt in the form of seamless steel pipe fluting with the heat exchange element welding, compare existing connecting bottom board and case structure, heat exchange element of the present invention can bear larger operating pressure, and the security of equipment can effectively improve.
To enter and discharge about water pipe one side of condensed water for steam when every adjacent heat exchange element is installed among the present invention and be staggered installation of, the steam inlet tube and the condensating water outlet tube that are adjacent two heat exchange elements are arranged at respectively both direction, for example the steam inlet tube on first heat exchange element and the direction of condensating water outlet tube are arranged at the left side, then the direction setting party of the steam inlet tube on the adjacent next heat exchange element and condensating water outlet tube so is staggered installation of placement to towards the right.This displacement structure both can reduce the installing space between each heat exchange element, and certain welding operation cleaning space can be provided again, had improved the economy that equipment uses.
Accompanying drawing 8 and 9 is for adopting the high-pressure plate type falling film evaporator overall structure figure of heat exchange element assembling of the present invention.Wherein used heat exchange element is the heat exchange element of aforesaid usefulness method preparation of the present invention.This high-pressure plate type falling film evaporator of the present invention provides the seamless steel pipe 14 of steam to pass distributor to each heat exchange element, be pooled to the steam inlet and take in 10, and with its welding; Discharge in the condensed water autocondensation water seamless steel pipe 16 that after heat exchange, produces, be pooled in the vapour-liquid mixing tube 3.Owing to being entrained with air, incoagulable gas and other organic volatiles in the condensed water of from the condensed water seamless steel pipe, discharging, needing to use vacuum separation to go out, otherwise can affect normally carrying out of next effect evaporation.Top at vapour-liquid mixing tube 3 offers hole, and connects fixed gas discharge connection 17; Hole is offered in the bottom, connects condensation-water drain and takes over 2, by this structure setting, can effectively condensed water be separated with incoagulable gas, respectively discharging.In the present invention, steam heating system is connected the fixed gas outlet system and is all adopted seamless steel pipe to connect mutually weldering fully with condensed water elimination, its bearing capacity significantly improves, abandoned and abandoned to adopt in the conventional evaporator frame type box structure form to be used for the structure of admission, draining, so that Whole Equipment reinforcement, compact conformation, parts use greatly and reduce, and effectively reduce equipment cost, and the maintenance and repair expense reduces greatly.
Employing the present invention can be with the mesohigh plate-type down-film evaporator as thermal cracker and the dual use of traditional evaporation equipment.Because traditional plate-type evaporator bearing capacity and poor reliability get, thermal cracking can't be finished in evaporimeter at all, but mesohigh plate-type evaporator of the present invention can be realized this requirement fully.
The present invention is after preparing heat exchange element, and processing is such as other parts such as housing, distributor, demisters successively again, and overall package connects each technique and takes over as requested, makes it become a complete high pressure plate-type evaporator.In the present invention each heat exchange element monolithic is independently arranged steam inlet, condensation-water drain, realized the type of attachment of monolithic assembling, dismounting and replacing.
Plate-type down-film evaporator operation process of the present invention is: the open system circulating pump, needs are evaporated concentrated liquid to be entered in the distributor 8 from circulation fluid entrance 13, by the surface of distributor 8 mean allocation to each heat exchange element 7, the formation film flows downward, simultaneously in evaporimeter, pass into thermal source steam, take over 10 by the steam inlet and enter into device interior, and in steam inlet seamless steel pipe 14 enters into each heat exchange element 7, with the abundant heat exchange of liquid to be evaporated outside the heat exchange element 7, liquid to be evaporated is constantly heated reaches boiling point then, and the generation indirect steam carries out gas-liquid separation through demister 11, obtain pure, discharged by indirect steam outlet 12 behind the high-quality indirect steam, as the thermal source recycling of other equipment.Thermal source steam undergoes phase transition in the 7 interior generation heat exchanges of evaporimeter heat exchange element, becomes condensed water, is displaced in the vapour-liquid mixing tube 3 by condensation-water drain seamless steel pipe 16.Owing to being entrained with air, incoagulable gas and other organic volatiles in the condensed water of from condensation-water drain seamless steel pipe 16, discharging, need to use vacuum separation to go out, otherwise can affect normally carrying out of next effect evaporation, therefore through behind the vapour-liquid mixing tube 3, because system vacuum effect, air, incoagulable gas and other organic volatiles are discharged from fixed gas discharge connection 17, and condensed water is discharged from condensation-water drain is taken over.Reciprocation cycle is finished evaporation process.Evaporimeter is connected to behind the process system the intelligent DCS control system that is comprised of the electric control element such as each electric control valve, frequency converter, fluid level controller, differential pressure transmitter and electric, instrument, control computer and program and carries out work by preset program, finishes continuously, effective evaporation technology.
The thermal source steam in the evaporimeter is led in rising, make it reach middle pressure degree, continue to be heated to black liquor temperature and reach 180 ~ 190 ℃, and keep evaporator shell pressure to reach 1.2MPa, dendritic long strand is interrupted in the black liquor under this temperature, pressure, forms small-molecule substance, effectively reduces intermolecular internal friction its viscosity is reduced greatly, and irreversible, form the common process of an evaporation and cracking.
To enter and discharge about seamless steel pipe one side of condensed water for steam when every adjacent heat exchange element is installed among the present invention and be staggered installation of, if namely on the heat exchange element a slice seamless steel pipe direction towards a left side, then descend a slice seamless steel pipe direction towards the right side, so be staggered installation of placement.This displacement structure both can reduce the installing space between each heat exchange element, and certain welding operation cleaning space can be provided again, had improved the economy that equipment uses.
Be used among the present invention providing the seamless steel pipe 14 of steam to pass distributor to each heat exchange element, be pooled to the steam inlet and take in 10, and with its welding; Discharge in the condensed water autocondensation water seamless steel pipe 16 that after heat exchange, produces, be pooled in the vapour-liquid mixing tube 3.Owing to being entrained with air, incoagulable gas and other organic volatiles in the condensed water of from the condensed water seamless steel pipe, discharging, needing to use vacuum separation to go out, otherwise can affect normally carrying out of next effect evaporation.Top at vapour-liquid mixing tube 3 offers hole, and connects fixed gas discharge connection 17; Hole is offered in the bottom, connects condensation-water drain and takes over 2, by this structure setting, can effectively condensed water be separated with incoagulable gas, respectively discharging.In the present invention, steam heating system is connected the fixed gas outlet system and is all adopted seamless steel pipe to connect mutually weldering fully with condensed water elimination, its bearing capacity significantly improves, abandoned and abandoned to adopt in the conventional evaporator frame type box structure form to be used for the structure of admission, draining, so that Whole Equipment reinforcement, compact conformation, parts use greatly and reduce, and effectively reduce equipment cost, and the maintenance and repair expense reduces greatly.

Claims (4)

1. in one kind, the preparation method of the heat exchange element of high-pressure plate type heat-exchanger rig, at first the periphery with two plates adopts the laser welded seam weldering to form the hollow component of a peripheral seam, then cut the part welding bead at water inlet position and the water exit position of hollow component respectively by designing requirement, again two sections tube couplings are arranged at respectively the part that cuts welding bead, with the welding of tube coupling outer wall and plate and make tube coupling inner with the internal communication of two plates only, form respectively steam inlet tube and condensating water outlet tube, the array of determining by designing requirement on the hollow component plane again welds the array that is comprised of a plurality of ring shape welding beads with laser, and incite somebody to action up and down two plate seam together at cast welding bead place, eliminating welding stress processes again, then water under high pressure is sent into by steam inlet tube and condensating water outlet tube and entered the bulging moulding in the hollow component, make heat exchange element.
2. the heat exchange element of the preparation method of the heat exchange element of mesohigh plate type evaporating apparatus claimed in claim 1 preparation, it is characterized in that the welding bead that has seam weldering at least is arranged in the periphery of heat exchange element, serve as reasons the one by one bulge and one by one by the ring shape welding interface with streamlined appearance that the array that forms consists of of caving in of the interface of heat exchange element.
3. middle high-pressure plate type evaporating apparatus, by housing, be arranged at that evaporative medium chamber, distributor, demister, indirect steam discharge connection, evaporative medium entrance, condensation-water drain that heat exchange element on the mounting bracket in the housing, space between heat exchange element consist of are taken over and the steam inlet is taken over and formed, it is characterized in that used heat exchange element is heat exchange element claimed in claim 2.
4. middle high-pressure plate type evaporating apparatus claimed in claim 3, it is characterized in that steam inlet tube and condensating water outlet tube location interval layout on the wherein each heat exchange element, namely the steam inlet tube of two adjacent heat exchange elements and condensating water outlet tube are arranged at respectively both direction.
CN2012103361017A 2012-09-13 2012-09-13 Preparation method of medium- and high-pressure plate heat exchanger and device Pending CN102862038A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103353191A (en) * 2013-04-08 2013-10-16 上海万享成套制冷设备有限公司 Heat exchanger, evaporator and manufacturing method of heat exchange components

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Publication number Priority date Publication date Assignee Title
US7121002B1 (en) * 1999-08-20 2006-10-17 Max Roth Heat exchanger
CN2723428Y (en) * 2004-09-10 2005-09-07 张培洲 Large plate type evaporator
WO2011124104A1 (en) * 2010-04-07 2011-10-13 Bestrong International Limited Means, method and system for heat exchange
CN202403567U (en) * 2012-01-18 2012-08-29 张家港市孚优工程咨询服务有限公司 Plate-type falling film heat exchanger

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CN103353191A (en) * 2013-04-08 2013-10-16 上海万享成套制冷设备有限公司 Heat exchanger, evaporator and manufacturing method of heat exchange components

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Application publication date: 20130109