CN203291539U - Horizontal tube type falling film evaporator - Google Patents
Horizontal tube type falling film evaporator Download PDFInfo
- Publication number
- CN203291539U CN203291539U CN2013203473652U CN201320347365U CN203291539U CN 203291539 U CN203291539 U CN 203291539U CN 2013203473652 U CN2013203473652 U CN 2013203473652U CN 201320347365 U CN201320347365 U CN 201320347365U CN 203291539 U CN203291539 U CN 203291539U
- Authority
- CN
- China
- Prior art keywords
- falling film
- film evaporator
- tube
- type falling
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model relates to a tube type falling film evaporator and provides a horizontal tube type falling film evaporator. The falling film evaporator is characterized in that an evaporation chamber, a distribution cavity and a recovery cavity are mutually-isolated airtight cavities; a condensing tube bundle is horizontally arranged in the evaporation chamber and is communicated with the distribution cavity and the recovery cavity; a film distribution device is arranged above the condensing tube bundle; a concentrated solution outlet is formed at the bottom of the evaporation chamber; condensate water outlets are formed at the bottoms of the distribution cavity and the recovery cavity; the falling film evaporator is provided with a vapor inlet tube and a vapor outlet tube; the vapor inlet tube is communicated with the outside and the distribution cavity; the vapor outlet tube is communicated with the outside and the evaporation chamber; and a demister is arranged in the vapor outlet tube. The horizontal tube type falling film evaporator has the beneficial effects that stability of the evaporation process and supply of secondary vapor and heating vapor is ensured by forming the airtight and mutually-isolated cavities; and the horizontal tube type falling film evaporator is suitable for MVR (mechanical vapor recompression) evaporation systems.
Description
Technical field
The present invention relates to tube-type down-flow evaporator, especially a kind of transverse tube type falling film evaporator.
Background technology
There is a large amount of evaporation operation in industrial production, especially in fields such as chemical industry, pharmacy, papermaking, sewage disposal, desalinizations.In present large-scale industrial production, evaporation operation adopts tube-type down-flow evaporator to form multi-effect evaporation system usually,, take high-temperature steam as thermal source, carries out the explosive evaporation of indirect thermal source heating.Tube-type down-flow evaporator, be divided into vertical pipe type falling film evaporator and transverse tube type falling film evaporator according to its structure.Multi-effect evaporation system, be that a plurality of evaporator series are used, and each evaporimeter namely is called an effect, will give birth to steam and pass into the first single-effect evaporator, makes the solution boiling of being heated produce indirect steam; The indirect steam of the first single-effect evaporator, as heating steam, is introduced the second single-effect evaporator; In like manner, the indirect steam that the second single-effect evaporator produces can be used as again the heating steam of third effect evaporator, by that analogy.Multi-effect evaporation system, reused heat energy, and can show lands reduces the consumption of giving birth to steam, greatly reduces costs.
But multi-effect evaporation system, duration of work need to continue supply to the first single-effect evaporator and give birth to steam, and living steam consumption is still larger.Therefore, in order further to reduce the consumption of giving birth to steam, later 1990s has been developed the MVR vapo(u)rization system, and MVR is the english abbreviation of mechanical steam recompression technology, and English full name is Mechanical Vapor Recompression.Compare with traditional vapo(u)rization system, the MVR vapo(u)rization system utilizes vapour compression machine to compress indirect steam, the raising of indirect steam temperature, pressure raising, the heat content of low-temperature level are increased, then as heating steam, send into evaporimeter and replace giving birth to steam, realize recycling of steam.Therefore, the MVR vapo(u)rization system need not to give birth to steam except starting, few to giving birth to steam consumption, steam supply, water supply capacity are required extremely low, public work is supporting few, and corresponding floor space is little, total investment of engineering is few, energy consumption is low, operating cost is low, and under vapour compression machine, negative pressure system effect, negative pressure low-temperature evaporation in vaporization chamber, evaporation efficiency is high, is particularly suitable for heat sensitive material.The MVR technology except forming monomer M VR vapo(u)rization system, also can form multiple-effect MVR vapo(u)rization system, as the vapo(u)rization system of the patent of invention of number of patent application is 201210112034.0, denomination of invention is highly salt containing organic waste water processing method and treating apparatus thereof.
But MVR vapo(u)rization system, use and give birth to steam through the indirect steam of vapour compression machine acting as the heating steam replacement, the fluctuation of vapour compression machine inlet pressure can cause the fluctuation of its outlet pressure, the fluctuation of its outlet pressure can further aggravate the fluctuation of its inlet pressure again, and then cause the unstable of system operation, therefore the MVR vapo(u)rization system requires continuing of indirect steam supply and stable, to guarantee the stable of vapour compression machine inlet pressure, and then guarantees the stable of system works.Limited by the problems referred to above, present MVR vapo(u)rization system can't adopt the transverse tube type falling film evaporator and can only adopt the vertical pipe type falling film evaporator.
concretely, the vertical pipe type falling film evaporator, be generally cylindrical tube and longitudinally arrange, be divided into the cloth film chamber at top in cylindrical shell by up and down two tube sheets, the separation chamber of bottom and the heating clamber between cloth film chamber and separation chamber, arrange longitudinally in heating clamber that some heating tubes form heating tube bundle, heating tube is fixedly mounted on respectively on two tube sheets of up and down up and down, cloth film chamber is communicated with separation chamber through heating tube, on the corresponding barrel of heating clamber, steam inlet tube and condensation-water drain are set, cloth film indoor location distributor and filming device, on the corresponding barrel in separation chamber, steam outlet pipe and concentrated solution outlet are set.In the MVR vapo(u)rization system, the vapour compression machine outlet is communicated with through the steam outlet pipe of secondary steam pipe with the vertical pipe type falling film evaporator through steam inlet tube connection, the entrance of heating steam pipe with the vertical pipe type falling film evaporator, and negative pressure system is communicated with separation chamber through negative pressure line.During work, enter the feed liquid of cloth film chamber under the effect of distributor and filming device, uniform distribution enters each heating tube and gravity nature film forming in heating tube; Heating steam enters heating clamber by steam inlet and the tube wall by heating tube heats the feed liquid liquid film, and condensed water is discharged by condensation-water drain; After liquid film absorbs amount of heat, temperature improves rapidly, realizes explosive evaporation; The steam that evaporation produces, accumulate one high velocity vapor stream under the negative pressure differential pressure action of up and down, vapor stream pulls liquid film to enter separation chamber with high speed; In separation chamber, the feed liquid dilatation flash distillation after being heated, residual liquid is the concentrate of feed liquid, is pure solvent after the indirect steam condensation.Because liquid film has high flowing velocity, evaporation efficiency is high, and under the guide effect of air-flow, indirect steam can enter separation chamber and fast through the buffering of separation chamber, can guarantee that therefore indirect steam continues, stable supply; Secondly, in heating clamber, heating steam is positioned at outside heating tube, is conducive to the diffusion of heating steam, and reducing heating steam supply fluctuation is also the impact that double evaporation-cooling production causes on evaporation process, so the vertical pipe type falling film evaporator can be applicable to the MVR vapo(u)rization system.
And the transverse tube type falling film evaporator, lateral arrangement, comprise housing, two tube sheets, condensation tube bank and film-distributing device, tube sheet is fixed in housing, surround and form vaporization chamber by two tube sheets and housing middle part, the condensation tube bank along housing shaft to horizontally disposed in vaporization chamber, the two ends of condensation tube bank are fixed through corresponding tube sheet respectively, and restrained the both sides that are communicated with vaporization chamber by condensation, film-distributing device is arranged in vaporization chamber and is positioned at the top of condensation tube bank; The bottom of vaporization chamber corresponding housing is provided with concentrated solution outlet, at a side pipe plate top or vaporization chamber corresponding housing top be provided with indirect steam outlet.In the vaporization chamber of transverse tube type falling film evaporator, heating steam is positioned at condenser pipe, liquid film is positioned at the condenser pipe outer wall, while therefore working, affected by the condensation tube bank, though there are certain movement tendency in indirect steam and feed liquid, the concrete comparatively complexity that flows of each time point, and the mobile existence of indirect steam and feed liquid influences each other, so there is fluctuation in the supply of indirect steam; Simultaneously, the work of MVR vapo(u)rization system vapour compression machine becomes periodically, while especially adopting lobed rotor compressor, and the further fluctuation of aggravation indirect steam supply of the periodicity of vapour compression machine, and then make the transverse tube type falling film evaporator can't be used for the MVR vapo(u)rization system.
But the existing MVR vapo(u)rization system that adopts the vertical pipe type falling film evaporator, feed liquid is in the vertical pipe type falling film evaporator, in the double action current downflow of deadweight, vapor stream, very high speed, for guaranteeing high efficiency, heating tube length is usually longer, also just cause the vertically highly larger of vertical pipe type falling film evaporator, so self and supporting pipeline cost are higher, and limited by the vertical pipe type falling film evaporator, the miniaturization of system be can't realize, and transportation inconvenience, maintenance difficulty caused; Secondly, in order to guarantee the steady operation of evaporimeter, require liquid film must be evenly, stable, can not be in heating tube dry film or disconnected film, so to distributor and filming device require highly, further caused the high cost of vertical pipe type falling film evaporator; They are three years old; the characteristic of vertical pipe type falling film evaporator and design feature; cause the very easily fouling of its heating tube; affect the obstruction that heat exchange even causes heating tube after the heating tube fouling; therefore needing shutdown to carry out scale removal cleans; simultaneously determine that also the vertical pipe type falling film evaporator is unfavorable for evaporating highly concentrated solution, especially have under the condition that crystalline solid separates out.
Summary of the invention
Technical problem to be solved by this invention is to provide and a kind ofly can continues, stablely provides indirect steam, can be applicable to the transverse tube type falling film evaporator of MVR vapo(u)rization system.
The technical solution adopted for the present invention to solve the technical problems is: the transverse tube type falling film evaporator comprises housing, two tube sheets, condensation tube bank and film-distributing device; Surrounded and formed inner chamber by described housing, described tube sheet is fixed in the housing inner chamber, along housing shaft to described housing inner chamber, by two tube sheets, is divided into distribution cavity, recycling cavity and the vaporization chamber between distribution cavity and recycling cavity; Described condensation tube bank along housing shaft to horizontally disposed in vaporization chamber, and the two ends of described condensation tube bank fix through corresponding tube sheet respectively, are communicated with distribution cavity and the recycling cavity of vaporization chamber both sides by the condensation tube bank; Described film-distributing device is arranged in vaporization chamber and is positioned at the top of condensation tube bank, and the bottom of described vaporization chamber corresponding housing is provided with concentrated solution outlet, and the bottom of described distribution cavity and recycling cavity corresponding housing is respectively arranged with condensation-water drain; Surrounding by described housing the inner chamber that forms is airtight cavity, and described distribution cavity, recycling cavity and vaporization chamber are the airtight cavity of mutually isolating; Be provided be communicated with the transverse tube type falling film evaporator outside with distribution cavity steam inlet tube, is communicated with the steam outlet pipe of transverse tube type falling film evaporator outside and vaporization chamber, be provided with demister in described steam outlet pipe.
Further, be provided with the indirect steam collector in described vaporization chamber, described indirect steam collector is along housing shaft to acting on whole vaporization chamber, and described steam outlet pipe is communicated with vaporization chamber through the indirect steam collector.As a kind of preferred, Open Side Down and be arranged at the middle and lower part of vaporization chamber for described indirect steam collector described groove shape indirect steam collector in the form of slot, and the condenser pipe of described condensation tube bank is arranged in respectively top, both sides or top and the both sides of indirect steam collector.As a kind of preferred, described indirect steam collector section is inverted U-shaped and straight tube, both sides side plate, consists of, and described straight tube bottom is opening vertically, and described side plate is fixed in respectively edge of opening vertically; Straight tube and the steam outlet pipe of described indirect steam collector are one-body molded, and described indirect steam collector is supported by corresponding tube sheet away from the other end of steam outlet pipe.
As a kind of preferred, the condenser pipe of described condensation tube bank arranges by row by row, and stagger in the about condenser pipe of adjacent lines, the condenser pipe of adjacent columns staggers up and down, the tube pitch in the tube pitch in each row between adjacent condenser pipe and each row between adjacent condenser pipe all greater than the caliber of condenser pipe, be less than or equal to the condenser pipe caliber of twice.
Further, be provided with airtight connection chamber, described connection chamber is connected with vaporization chamber through steam outlet pipe, is provided with and is communicated with the inside and outside indirect steam outlet of connection chamber, fixed gas outlet.
Further, be provided with breather pipe in described housing, by breather pipe, be communicated with vaporization chamber and distribution cavity.Further, be provided with the level difference controller of controlling the breather pipe break-make.As a kind of preferred, described level difference controller consists of the U-shaped pipe that is communicated with breather pipe, and the U-shaped opening upwards of described U-shaped pipe.
Further, described housing reaches by isometrical shell ring the end plate that detachably is fixedly installed in the shell ring two ends and forms, be installed with two back-up rings in described shell ring, described tube sheet is removably fixed in housing through corresponding back-up ring respectively, and described tube sheet all is positioned at the axial outside of corresponding back-up ring, and described condenser pipe two ends detachably are fixedly installed in respectively corresponding tube sheet.
The invention has the beneficial effects as follows: transverse tube type falling film evaporator of the present invention, by distribution cavity, vaporization chamber and the recycling cavity that forms airtight and mutual isolation, control possibility is provided for internal pressure, in conjunction with the control to film-distributing device, the control of realization to evaporation process, and then guarantee the stable of evaporation process; Simultaneously, the formation of flowing by indirect steam and the cushioning effect of distribution cavity and recycling cavity, the fluctuation that slows down air-flow, guarantee the continual and steady of indirect steam, heating steam supply, and then make transverse tube type falling film evaporator of the present invention can be applicable to the MVR vapo(u)rization system.
Description of drawings
Fig. 1 is the axial cross-sectional schematic of horizontal tube evaporator of the present invention;
Fig. 2 is the radially cross-sectional schematic of horizontal tube evaporator of the present invention;
Fig. 3 is the condenser pipe scheme of installation of horizontal tube evaporator of the present invention;
Fig. 4 is the spray equipment scheme of installation of horizontal tube evaporator of the present invention.
The specific embodiment
The present invention will be further described below in conjunction with embodiment.
Transverse tube type falling film evaporator of the present invention, comprise housing 111, two tube sheets 112, condensation tube bank 120 and film-distributing device 160; Surround and form inner chamber by described housing 111, described tube sheet 112 is fixed in housing 111 inner chambers, along axial described housing 111 inner chambers of housing 111, by two tube sheets 112, is divided into distribution cavity 151, recycling cavity 153 and the vaporization chamber 152 between distribution cavity 151 and recycling cavity 153; Described condensation tube bank 120 is axially horizontally disposed in vaporization chamber 152 along housing 111, and the two ends of described condensation tube bank 120 are fixing through corresponding tube sheet 112 respectively, is communicated with distribution cavity 151 and the recycling cavity 153 of vaporization chamber 152 both sides by condensation tube bank 120; Described film-distributing device 160 is arranged in vaporization chamber 152 and is positioned at the top of condensation tube bank 120, the bottom of described vaporization chamber 152 corresponding housing 111 is provided with concentrated solution outlet 142, and the bottom of described distribution cavity 151 and recycling cavity 153 corresponding housing 111 is respectively arranged with condensation-water drain 141; Surrounding by described housing 111 inner chamber that forms is airtight cavity, and described distribution cavity 151, recycling cavity 153 and vaporization chamber 152 are the airtight cavity of mutually isolating; Be provided be communicated with transverse tube type falling film evaporator 100 outside with distribution cavity 151 steam inlet tube 131, is communicated with the steam outlet pipe 132 of transverse tube type falling film evaporator 100 outsides and vaporization chamber 152, be provided with demister 134 in described steam outlet pipe 132.
During work, feed liquid is sent into vaporization chamber 152 through film-distributing device 160, and along each condenser pipe 121 outer walls of condensation tube bank 120, from top to bottom flows, natural film forming under Action of Gravity Field; Heating steam enters distribution cavity 151 by steam inlet tube 131, and through distribution cavity 151, enters each condenser pipe 121, and heating steam and feed liquid liquid film are through condenser pipe 121 tube wall heat exchange, and after the heating steam heat exchange, condensation forms condensed water; Condensed water enters recycling cavity 153 and distribution cavity 151 along condenser pipe 121, and by the condensation-water drain 141 in two chambeies, is discharged; In vaporization chamber 152, after liquid film absorbs amount of heat, temperature improves rapidly, and the evaporation of negative pressure low-temperature boiling, finally flow to vaporization chamber 152 bottoms and flash distillation under suction function, and residual liquid is the concentrate of feed liquid and is discharged by concentrated solution outlet 142; The indirect steam that evaporation produces is under the decimate action of the vapour compression machine of MVR vapo(u)rization system, extracted out by steam outlet pipe 132, compress through vapour compression machine, the raising of indirect steam temperature, pressure raising, the heat content of low-temperature level are increased, then again send into as heating steam, realize recycling of steam.
Transverse tube type falling film evaporator 100 of the present invention, surround by housing 111 and tube sheet 112 distribution cavity 151, vaporization chamber 152 and the recycling cavity 153 that forms airtight and mutual isolation.After indirect steam enters distribution cavity 151, enter recycling cavity 153 through each condenser pipe 121, affected by the heat exchange condensation, air pressure in recycling cavity 153 is less than distribution cavity 151 internal gas pressures, and under differential pressure action, heating steam continues to enter condenser pipe 121, therefore only need to control the draught head between recycling cavity 153 and distribution cavity 151, can realize the control to the interior heating steam flow of condenser pipe 121, flow velocity, and, to the keeping of draught head, only need supply and the consumption of balance heating steam.Therefore, the control in conjunction with to film-distributing device 160 liquid supply pressures, flow, can realize the control to evaporation process, and it is low to control difficulty.Secondly,, by the cushioning effect of distribution cavity 151 and recycling cavity 153, reduce the fluctuation of heating steam supply.
Therefore, in sum, it is stable that transverse tube type falling film evaporator 100 of the present invention can guarantee to evaporate, and also namely can continue, the stable indirect steam that provides, and can be applicable to the MVR vapo(u)rization system.
Further, be provided with indirect steam collector 133 in described vaporization chamber 152, described indirect steam collector 133 is along housing 111 axial action in whole vaporization chamber 152, and described steam outlet pipe 132 is communicated with vaporization chamber 152 vapour compression machines through indirect steam collector 133 and is communicated with indirect steam collector 133 through steam outlet pipe 132.Indirect steam collector 133 acts on whole vaporization chamber 152 vertically, the indirect steam that evaporation produces is under the effect of vapour compression machine 212, collect through indirect steam collector 133, then extracted out by steam outlet pipe 132, can be at the certain pressure reduction of the interior formation of vaporization chamber 152, and by pressure reduction, force to form indirect steam stream, flow and further guarantee the continual and steady of indirect steam supply by indirect steam.
The version of above-mentioned indirect steam collector 133, setting position can be all arbitrarily, as long as can be at the stable indirect steam stream of the interior formation of vaporization chamber 152, as square, trapezoidal draft hood or tube bank.Specifically,, take square draft hood as example, can be, the condensation tube bank be arranged at the vaporization chamber middle part, and draft hood is symmetricly set in condensation tube bank both sides and opening is restrained towards condensation; Take tube bank as example, can be, restrain on the tube wall of each pipe all array bleed through hole or groove, each pipe inserts respectively gap between the pipe of condensation tube bank 120.As a kind of preferred, described indirect steam collector 133 is in the form of slot, Open Side Down and be arranged at the middle and lower part of vaporization chamber 152 for described groove shape indirect steam collector 133, and the condenser pipe 121 of described condensation tube bank 120 is arranged in respectively top, both sides or top and the both sides of indirect steam collector 133.The version of groove shape indirect steam collector 133 can be arbitrarily, straight tube as V-shaped in section, bend pipe etc.
The setting position of steam outlet pipe 132 can be arbitrarily, but its version should adapt with the version of indirect steam collector 133, and take above-mentioned square draft hood as example, steam outlet pipe should have an outlet and two entrances; Simultaneously, the setting of steam outlet pipe 132 should not affect the installation of condensation tube bank 120.For simplified structure, in example as shown in the figure, as shown in Figure 1 and Figure 2, described indirect steam collector 133 sections are inverted U-shaped and straight tube, both sides side plate, consist of, and described straight tube bottom is opening vertically, and described side plate is fixed in respectively edge of opening vertically; The straight tube of described indirect steam collector 133 and steam outlet pipe 132 are one-body molded, and described indirect steam collector 133 is supported by corresponding tube sheet 112 away from the other end of steam outlet pipe 132.Above-mentioned indirect steam collector 133 can directly be fixed on corresponding tube sheet 112 by welding, flange etc. away from the other end of steam outlet pipe 132, but in example as shown in the figure, for the example easy disassembly, away from the other end of steam outlet pipe 132, baffle plate is set at described indirect steam collector 133, and by the spindle nose on baffle plate, inserts in jack on corresponding tube sheet the support that realizes indirect steam collector 133.
Be with above-mentioned section that inverted U-shaped indirect steam collector 133 adapts, in example as shown in the figure, as shown in Figure 1 and Figure 2, the section of described condensation tube bank 120 is inverted concave, described indirect steam collector 133 is positioned at the inverted concave opening, and the condenser pipe 121 of described condensation tube bank 120 is arranged respectively top and the both sides with indirect steam collector 133.The arrangement form of this condensation tube bank 120, had condenser pipe 121 concurrently and be arranged in respectively the advantage of top and the both sides of indirect steam collector 133, can guarantee that condensation tube bank 120 vertically avoid the increase of transverse tube type falling film evaporator 100 longitudinal sizes in height., for convenience of expression, only draw a condenser pipe 121 in Fig. 1.
The arrangement mode of the condenser pipe 121 of condensation tube bank 120 can have various ways, but as a kind of preferred, adopt staggered mode, the condenser pipe 121 that is also described condensation tube bank 120 arranges by row by row, and stagger in condenser pipe 121 left and right of adjacent lines, the condenser pipe 121 of adjacent columns staggers up and down, the tube pitch in the tube pitch in each row between adjacent condenser pipe 121 and each row between adjacent condenser pipe 121 all greater than the caliber of condenser pipe 121, be less than or equal to condenser pipe 121 calibers of twice.At this moment, each condenser pipe 121 is all between adjacent four condenser pipes 121, liquid film on each condenser pipe 121 flows downward on the condenser pipe 121 of adjacent lower floor of adjacent lower floor and adjacent lower floor, from top to bottom, each stock material liquid separates, converges, spreads, and then guarantees even the even of feed concentration that reach of thickness of liquid film; And the continuous variation by flowing to, reduce the addition of air-flow to the feed liquid flowing velocity, avoid under the feed liquid Rapid Flow until bottom, especially when forcing indirect steam stream to flow, can guarantee good evaporation effect from heat exchange stroke, flow velocity, uniformity from top to bottom.Simultaneously, this arrangement mode, effectively increase the density of arranging of condenser pipe 121, increases heat exchange area.Consider arrange density and scale effect, in example as shown in the figure, as shown in Figure 2, the tube pitch in the tube pitch in each row between adjacent condenser pipe 121 and each row between adjacent condenser pipe 121 is condenser pipe 121 calibers of 1.57 times.
Further, be provided with airtight connection chamber 154, described connection chamber 154 is connected with vaporization chamber 152 through steam outlet pipe 132, is provided with and is communicated with the inside and outside indirect steam outlet 135 of connection chamber 154, fixed gas outlet 143.Setting by connection chamber 154, negative pressure system is connected with fixed gas outlet 143 through negative pressure line, vapour compression machine is connected with indirect steam outlet 135 through secondary steam pipe 211, facilitate separation and the extraction of indirect steam, fixed gas, the main fixed gas that extracts of negative pressure system 221, and vapour compression machine 212 extracts indirect steam, avoids the loss of indirect steam, and easy to connect.Secondly, in the MVR vapo(u)rization system, although the fixed gas in the main extraction system of negative pressure system, the effect of extracting is little, but still there is certain impact in internal differential pressure, therefore negative pressure system 221 acts on its vaporization chamber 152 through the steam outlet pipe 132 of transverse tube type falling film evaporator 100, and the vaporization chamber 152 that directly acts on transverse tube type falling film evaporator 100 with negative pressure system 221 is compared, and more is conducive to the stable of the interior indirect steam stream of vaporization chamber 152.In system work process, at the interior meeting of connection chamber 154 coagulating small quantities condensed water, especially at the work initial stage, when system temperature is low.Therefore,, in order to guarantee the normal operation of system, facilitate the discharging of condensed water in connection chamber 154, described connection chamber 154 bottoms are provided with condensation-water drain 141.
Evaporimeter of the present invention, according to actual needs, can form monomer vapo(u)rization system or parallel system, train.Above-mentioned monomer vapo(u)rization system, a transverse tube type falling film evaporator 100 namely only is set, described vapour compression machine outlet is connected through the steam inlet tube 131 of heating steam pipe with transverse tube type falling film evaporator 100, and described vapour compression machine entrance is connected through the steam outlet pipe 132 of secondary steam pipe 211 with transverse tube type falling film evaporator 100; Parallel system, at least two transverse tube type falling film evaporators 100 namely are set, described vapour compression machine outlet is connected through the steam inlet tube 131 of heating steam pipe with each transverse tube type falling film evaporator 100, and described vapour compression machine entrance is connected through the steam outlet pipe 132 of secondary steam pipe 211 with each transverse tube type falling film evaporator 100; Train, also namely form multi-effect evaporation system, be provided with at least two transverse tube type falling film evaporators 100, described vapour compression machine outlet is connected through the steam inlet tube 131 of heating steam pipe with top transverse tube type falling film evaporator 100, described vapour compression machine entrance is communicated with end transverse tube type falling film evaporator 100 steam outlet pipes 132 through secondary steam pipe 211, and on adjacent transverse tube type falling film evaporator 100, the steam outlet pipe 132 of an effect is communicated with the steam inlet tube 131 of next effect.
Multi-effect evaporation system,, according to feed liquid and the popular difference of indirect steam, be divided into again and flow process, countercurrent flow, cross-flow flow process and advection flow process.Concretely, and the stream flow process, namely feed liquid and indirect steam be in the same way successively by each single-effect evaporator, and front effect pressure is higher than aftereffect, feed liquid pumping or borrow pressure reduction to flow; Countercurrent flow, namely feed liquid is opposite with the indirect steam flow direction, needs, with pump, feed liquid is delivered to the higher last effect of pressure; And the cross-flow flow process is and the combination of flow process and countercurrent flow; In the advection flow process, indirect steam is successively by each effect, but feed liquid every effect pass in and out separately.Multi-effect evaporation system is respectively imitated the type of attachment of liquid feeding pipeline of the concentrated solution outlet 142 of transverse tube type falling film evaporator 100 and film-distributing device 160 and the flow process that system adopts adapts, take and flow process as example, the film-distributing device 160 of top transverse tube type falling film evaporator 100 is by feed liquid liquid feeding pipeline supply original liquid, beyond top transverse tube type falling film evaporator 100, the film-distributing device 160 of each transverse tube type falling film evaporator 100 is connected with concentrated solution outlet 142 liquid feeding pipeline through between effect of an adjacent upper effect, uses adjacent upper one concentrate of imitating as feed liquid.
The shape of above-mentioned transverse tube type falling film evaporator 100 can be arbitrarily, as square, spherical, cylindricality etc.; The system arrangement form,, according to the site requirements of reality, can arrange, horizontally disposed etc. up and down.When transverse tube type falling film evaporator 100 of the present invention is used for multiple-effect MVR vapo(u)rization system, best, described steam inlet tube 131 and steam outlet pipe 132 are arranged at respectively the axial two ends of transverse tube type falling film evaporator 100, only transverse tube type falling film evaporator 100 arranges connection chamber 154 endways, and beyond top transverse tube type falling film evaporator 100, the steam inlet tube 131 of each transverse tube type falling film evaporator 100 consists of the steam outlet pipe 132 of an adjacent upper effect transverse tube type falling film evaporator 100.Owing to directly being connected between adjacent transverse tube type falling film evaporator 100, therefore, compact conformation, take up an area littlely, and between effect, pipeline is easy to connect, and the indirect steam thermal loss is little.Secondly, 151 pairs of indirect steams of distribution cavity by adjacent next effect transverse tube type falling film evaporator 100 play cushioning effect, reduce the fluctuation of respectively imitating the indirect steam supply, excessive for fear of distribution cavity 151 internal gas pressures, guarantee the safety of producing, the top of distribution cavity 151 corresponding housing 111 is provided with relief port 144.Its three, can easily realize the quick-replaceable of transverse tube type falling film evaporator 100, guarantee quick reparation and the continuous running of system, when especially it is as fresh water production equipment, quick reparation and the continuous running of system, particularly crucial.
In multiple-effect MVR vapo(u)rization system, fixed gas in the main extraction system of negative pressure system, the effect of extracting is little, can imitate transverse tube type falling film evaporator 100 vavuum pump is set separately for each, a vavuum pump also can only be set and extract and respectively imitate transverse tube type falling film evaporator 100 respectively.Negative pressure system 221 can directly act on the vaporization chamber 152 of each transverse tube type falling film evaporator 100; Can be also, transverse tube type falling film evaporator 100 arranges connection chamber endways, negative pressure system 221 acts on end transverse tube type falling film evaporator 100 through connection chamber, transverse tube type falling film evaporator 100 beyond end transverse tube type falling film evaporator 100, negative pressure system 221 act on the vaporization chamber 152 of a upper effect transverse tube type falling film evaporator 100 through the distribution cavity of adjacent next effect transverse tube type falling film evaporator 100.But arrange separately for each effect transverse tube type falling film evaporator 100, can increase energy consumption, and increase steam loss; Respectively imitate transverse tube type falling film evaporator 100 and a vavuum pump only is set and extracts respectively, pipeline connects more complicated, and to the pressure reduction of each effect transverse tube type falling film evaporator 100, controls more difficult.
Therefore, further, be provided with breather pipe 171 in described housing 111, and by breather pipe 171, be communicated with vaporization chamber 152 and distribution cavity 151.Setting by breather pipe 171, the vaporization chamber 152 of next effect transverse tube type falling film evaporator 100 is communicated with through the vaporization chamber 152 of a same effect transverse tube type falling film evaporator 100 of the steam outlet pipe 132 of this effect breather pipe 171, distribution cavity 151, steam inlet tube 131 and a upper effect successively, thereby make the vaporization chamber 152 that system is respectively imitated transverse tube type falling film evaporator 100 be interconnected, make it possible to by the effect of a cover negative pressure system realization to each transverse tube type falling film evaporator 100; Simultaneously,, by the vapour lock of breather pipe 171, make negative pressure system be reduced successively by end to top the effect of each transverse tube type falling film evaporator 100, the vacuum that guarantees each transverse tube type falling film evaporator 100 by end to top improve successively, boiling point reduces successively.When concrete structure multiple-effect MVR vapo(u)rization system, the first effect transverse tube type falling film evaporator 100 need not to arrange breather pipe 171, breather pipe 171 can be set or need in use closed vent pipe 171.
Further, in order better to control in multiple-effect MVR vapo(u)rization system the pressure reduction of respectively imitating between transverse tube type falling film evaporator 100, be provided with the level difference controller of controlling breather pipe 171 break-makes., by the control to breather pipe 171 break-makes, realize the control of negative pressure system 221 to its effect degree, and then realize the control of pressure reduction between effect.The level difference controller can adopt controller initiatively, as manual, electrically operated valve etc.; Also can adopt passive adaptive controller, as bend pipes such as U-shaped pipes.
In example as shown in the figure, as shown in Figure 1, described level difference controller consists of the U-shaped pipe 172 that is communicated with breather pipe 171, and the U-shaped opening upwards of described U-shaped pipe 172.During work, steam condenses in U-shaped pipe 172, and the effect by U-shaped pipe 172 interior condensed waters, guarantees the Negative Pressure Difference of U-shaped pipe two side cavity.Under stable working condition, the quantity of U-shaped pipe 172 interior condensed waters, relevant with the running parameter of evaporimeter.When working condition is unstable, the variation of the interior condensed water quantity of U-shaped pipe 172, can cause the variation of pressure reduction, and the variation of pressure reduction can cause the variation of air-flow velocity, flow, the pressure reduction air-flow that diminishes slows down, and is conducive to steam condensation, and it is anxious that pressure reduction becomes the atmosphere rheology, be conducive to air-flow and take condensed water out of, so U-shaped pipe 172 can carry out the self adaptation adjustment to pressure reduction simultaneously.
In order further to facilitate the maintenance of transverse tube type falling film evaporator 100, described housing 111 reaches by isometrical shell ring 111a the end plate 111b that detachably is fixedly installed in shell ring 111a two ends and forms, be installed with two back-up ring 111c in described shell ring 111a, described tube sheet 112 is removably fixed in housing 111 through corresponding back-up ring 111c respectively, and described tube sheet 112 all is positioned at the axial outside of corresponding back-up ring 111c, and described condenser pipe 121 two ends detachably are fixedly installed in respectively corresponding tube sheet 112.Therefore, between shell ring 111a and end plate 111b, all detachable between tube sheet 112 and condenser pipe 121, and then each parts are keeped in repair and replace, maintenance cost is low, speed is fast, especially can greatly be conveniently to the removing of condenser pipe 121 outer foulings.In example as shown in the figure, as shown in Figure 1, Figure 3, between shell ring 111a and end plate 111b, all be bolted between tube sheet 112 and back-up ring 111c, shell ring 111a and back-up ring 111c are welded and fixed; And cushion rubber 122 is set, and cushion rubber 122 sections are spill, by spill, are stuck on tube sheet 122, and cushion rubber 122 is passed respectively at condenser pipe 121 two ends, and the strain by cushion rubber 122 is fixedly installed in the through hole of corresponding tube sheet 112 condenser pipe 121 expanded joints.
Connect in order further to make compact conformation and to simplify pipeline, in example as shown in the figure, as shown in Figure 1, be provided with the single-ended closed cylinder 113 isometrical with transverse tube type falling film evaporator 100, described cylinder 113 is connected and by cylinder 113, with adjacent end plate 111b, is surrounded and form connection chamber 154 through flange with transverse tube type falling film evaporator 100.
The film-distributing device 160 of system can adopt existing structure arbitrarily, as the device that consists of filming device and distributor.In example as shown in the figure, as Fig. 1, shown in Figure 4, adopt the spray film-distributing device, and with the distribution of condensation tube bank 120, adapt, the spray film-distributing device consists of two row spray equipments, and as shown in Figure 2, two row spray equipments lay respectively at the adjacent outside of the top of indirect steam collector 133 top condenser pipes 121, make cloth liquid distribute and adapt with the evaporation capacity of each condensation tube bank 120, be also that the top cloth liquid of indirect steam collector 133 is few and both sides cloth liquid is many.In order to guarantee the liquid supply pressure that sprays, each is imitated on the liquid feeding pipeline of film-distributing device 160 and is provided with feedstock pump., by the setting of feedstock pump, can effectively control the quantity delivered of feed liquid and supply with pressure, with the feed liquid supply of each effect of guarantee and the coupling of steam supply; And concentrate need not differential driving, can strengthen the flexibility of system layout, setting, control.
For maintenance and the replacing that facilitates spray equipment, as shown in Figure 4, described film-distributing device 160 adopts the spray film-distributing device that consists of spray equipment, and described spray equipment comprises feed liquid inlet pipe 161, compresses plug screw 164, joint 165, inner tube 162, spray head 163; Be provided with up big and down small step through-hole in described joint 165 and be arranged on housing 111, described inner tube 162 is passed the step through-hole of joint 165 and is inserted in housing 111, described spray head 163 external diameters are less than the minimum diameter of step through-hole and be installed on inner tube 162 bottoms, and described inner tube 162 tops are provided with the defining flange 167 that contacts spacing cooperation with the step of step through-hole; Described feed liquid inlet pipe 161 is positioned at outside housing 111, the step through-hole bottom interior and described feed liquid inlet pipe 161 that joint 165 is inserted in the bottom of described feed liquid inlet pipe 161 is provided with the press flange 166 that contacts spacing cooperation with defining flange 167, described inner tube 162 tops arrange internal thread, in order to by screw rod, inner tube 162 is mentioned taking-up; Be respectively arranged with seal washer 168 between described defining flange 167 and press flange 166 and between the step of defining flange 167 and step through-hole, described compression plug screw 164 and joint 165 threaded engagement, described compression plug screw 164 bottoms act on press flange 166 and through press flange 166, act on defining flange 167.This version, can under the prerequisite of not dismantling housing 111, realize maintenance and the replacing of spray equipment.
Also there are various instrument in this evaporimeter, comprise the flowmeter of the fluid level controller in each chamber and Pressure gauge, condensed water and concentrate, to the thermometer that steam, feed temperature are measured, all identical with existing horizontal pipe falling film evaporator.
Claims (10)
1. the transverse tube type falling film evaporator, comprise housing (111), two tube sheets (112), condensation tube bank (120) and film-distributing device (160); Surround and form inner chamber by described housing (111), described tube sheet (112) is fixed in housing (111) inner chamber, be divided into distribution cavity (151), recycling cavity (153) along the axial described housing of housing (111) (111) inner chamber by two tube sheets (112) and be positioned at distribution cavity (151) and recycling cavity (153) between vaporization chamber (152); Described condensation tube bank (120) is axially horizontally disposed in vaporization chamber (152) along housing (111), and the two ends of described condensation tube bank (120) are fixing through corresponding tube sheet (112) respectively, are communicated with distribution cavity (151) and the recycling cavity (153) of vaporization chamber (152) both sides by condensation tube bank (120); Described film-distributing device (160) is arranged in vaporization chamber (152) and is positioned at the top of condensation tube bank (120), the bottom of described vaporization chamber (152) corresponding housing (111) is provided with concentrated solution outlet (142), and the bottom of described distribution cavity (151) and recycling cavity (153) corresponding housing (111) is respectively arranged with condensation-water drain (141); It is characterized in that: surrounding by described housing (111) inner chamber that forms is airtight cavity, and described distribution cavity (151), recycling cavity (153) and vaporization chamber (152) are the airtight cavity of mutually isolating; Be provided be communicated with transverse tube type falling film evaporator (100) outside with distribution cavity (151) steam inlet tube (131), is communicated with the steam outlet pipe (132) of transverse tube type falling film evaporator (100) outside and vaporization chamber (152), be provided with demister (134) in described steam outlet pipe (132).
2. transverse tube type falling film evaporator as claimed in claim 1, it is characterized in that: be provided with indirect steam collector (133) in described vaporization chamber (152), described indirect steam collector (133) is along housing (111) axial action in whole vaporization chamber (152), and described steam outlet pipe (132) is communicated with vaporization chamber (152) through indirect steam collector (133).
3. transverse tube type falling film evaporator as claimed in claim 2, it is characterized in that: described indirect steam collector (133) is in the form of slot, Open Side Down and be arranged at the middle and lower part of vaporization chamber (152) for described groove shape indirect steam collector (133), and the condenser pipe (121) of described condensation tube bank (120) is arranged in respectively top, both sides or top and the both sides of indirect steam collector (133).
4. transverse tube type falling film evaporator as claimed in claim 3, it is characterized in that: described indirect steam collector (133) section is inverted U-shaped and straight tube, both sides side plate, consists of, described straight tube bottom is opening vertically, and described side plate is fixed in respectively edge of opening vertically; The straight tube of described indirect steam collector (133) and steam outlet pipe (132) are one-body molded, and described indirect steam collector (133) is supported by corresponding tube sheet (112) away from the other end of steam outlet pipe (132).
5. transverse tube type falling film evaporator as claimed in claim 1, it is characterized in that: the condenser pipe (121) of described condensation tube bank (120) arranges by row by row, and stagger in the about condenser pipe of adjacent lines (121), the condenser pipe (121) of adjacent columns staggers up and down, the tube pitch in the tube pitch in each row between adjacent condenser pipe (121) and each row between adjacent condenser pipe (121) all greater than the caliber of condenser pipe (121), be less than or equal to condenser pipe (121) caliber of twice.
6. transverse tube type falling film evaporator as claimed in claim 1, it is characterized in that: be provided with airtight connection chamber (154), described connection chamber (154) is connected with vaporization chamber (152) through steam outlet pipe (132), is provided with and is communicated with the inside and outside indirect steam outlet (135) of connection chamber (154), fixed gas outlet (143).
7., as claim 1,2,3,4,5 or 6 described transverse tube type falling film evaporators, it is characterized in that: be provided with breather pipe (171) in described housing (111), and by breather pipe (171), be communicated with vaporization chamber (152) and distribution cavity (151).
8. transverse tube type falling film evaporator as claimed in claim 7, is characterized in that: be provided with the level difference controller of controlling breather pipe (171) break-make.
9. transverse tube type falling film evaporator as claimed in claim 8 is characterized in that: described level difference controller is by U-shaped pipe (172) formation that is communicated with breather pipe (171), and the U-shaped opening upwards of described U-shaped pipe (172).
10. transverse tube type falling film evaporator as claimed in claim 1, it is characterized in that: described housing (111) reaches by isometrical shell ring (111a) end plate (111b) that detachably is fixedly installed in shell ring (111a) two ends and forms, be installed with two back-up rings (111c) in described shell ring (111a), described tube sheet (112) is respectively in corresponding back-up ring (111c) is removably fixed in housing (111), and described tube sheet (112) all is positioned at the axial outside of corresponding back-up ring (111c), described condenser pipe (121) two ends detachably are fixedly installed in respectively corresponding tube sheet (112).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203473652U CN203291539U (en) | 2013-06-17 | 2013-06-17 | Horizontal tube type falling film evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203473652U CN203291539U (en) | 2013-06-17 | 2013-06-17 | Horizontal tube type falling film evaporator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203291539U true CN203291539U (en) | 2013-11-20 |
Family
ID=49567580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203473652U Withdrawn - After Issue CN203291539U (en) | 2013-06-17 | 2013-06-17 | Horizontal tube type falling film evaporator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203291539U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103272394A (en) * | 2013-06-17 | 2013-09-04 | 四川东联新能源科技有限公司 | Horizontal pipe type falling film evaporator |
| CN111635053A (en) * | 2020-05-25 | 2020-09-08 | 深圳能源资源综合开发有限公司 | Desulfurization wastewater zero-discharge treatment system and method |
-
2013
- 2013-06-17 CN CN2013203473652U patent/CN203291539U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103272394A (en) * | 2013-06-17 | 2013-09-04 | 四川东联新能源科技有限公司 | Horizontal pipe type falling film evaporator |
| CN111635053A (en) * | 2020-05-25 | 2020-09-08 | 深圳能源资源综合开发有限公司 | Desulfurization wastewater zero-discharge treatment system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103272395B (en) | MVR (mechanical vapor recompression) vaporization system | |
| CN102512835B (en) | Multi-effect plate type rising film countercurrent evaporation concentration device and method thereof | |
| CN206156788U (en) | Miniature sea water desalination device based on waste heat utilization | |
| JP2013173100A (en) | Heat exchange type distillation apparatus | |
| CN203291538U (en) | MVR (mechanical vapor recompression) evaporation system | |
| CN203291539U (en) | Horizontal tube type falling film evaporator | |
| CN206535220U (en) | The board-like elevating membranes of MVR and forced-circulation evaporation crystal system | |
| CN101274784B (en) | Steam-water four-stage separating five-effect water distillator | |
| CN103272394B (en) | Horizontal pipe type falling film evaporator | |
| CN102020327B (en) | Ammonia nitrogen waste water treatment equipment | |
| CN102512833A (en) | Horizontal-pipe falling-film evaporation method coupling distillation and device thereof | |
| CN204752254U (en) | Rise membrane multiple -effect formula distilled water machine | |
| CN215609388U (en) | Energy-saving evaporation device | |
| CN103553164A (en) | High-salt wastewater treatment system for horizontal-vertical tube falling film multiple-effect evaporation | |
| CN203154852U (en) | Horizontal flash tank and low temperature multi-effect distilled sea water desalination system | |
| CN206918978U (en) | A kind of pure steam generator | |
| CN207210005U (en) | A kind of reverse osmosis thick water treatment system | |
| CN206635064U (en) | A kind of energy-saving membrane distillation wastewater treatment equipment of modularization installation | |
| CN203899184U (en) | Novel multiple-effect evaporation device | |
| CN2892937Y (en) | Paper-making black liquor hot air direct evaporating thickener | |
| CN220845606U (en) | Multiple-effect integrated falling film evaporator | |
| CN200978262Y (en) | Falling-film evaporator | |
| CN212476168U (en) | Steam extraction compression heat exchange residual steam circulating distillation water purification equipment | |
| CN2676033Y (en) | Pure steam generator | |
| CN203478164U (en) | Vertical type steam generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131120 Effective date of abandoning: 20141126 |
|
| RGAV | Abandon patent right to avoid regrant |