EP0744983A1 - Appareil d'evaporation - Google Patents

Appareil d'evaporation

Info

Publication number
EP0744983A1
EP0744983A1 EP95907665A EP95907665A EP0744983A1 EP 0744983 A1 EP0744983 A1 EP 0744983A1 EP 95907665 A EP95907665 A EP 95907665A EP 95907665 A EP95907665 A EP 95907665A EP 0744983 A1 EP0744983 A1 EP 0744983A1
Authority
EP
European Patent Office
Prior art keywords
evaporating
unit
water
mantle
fluid
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.)
Ceased
Application number
EP95907665A
Other languages
German (de)
English (en)
Inventor
Kari SÄILY
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sulzer Pump Solutions Finland Oy
Original Assignee
High Speed Tech Ltd Oy
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by High Speed Tech Ltd Oy filed Critical High Speed Tech Ltd Oy
Publication of EP0744983A1 publication Critical patent/EP0744983A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/28—Evaporating with vapour compression
    • B01D1/2887—The compressor is integrated in the evaporation apparatus

Definitions

  • the invention relates to an evaporating apparatus according to the preamble of claim 1.
  • the evaporating apparatus according to the invention is used for carry ⁇ ing out an evaporation process, wherein fluid is concentrated by evapo ⁇ rating part of it, most often under conditions of a pressure below the atmospheric pressure of the environment.
  • the energy required by the evaporation process is produced by using a pressurizer effective in the process gas.
  • the blade wheel of the pressurizer is in the process gas.
  • An electrically driven operat ⁇ ing unit most usually an electric motor, is mounted as a part of the pipework outside the evaporating apparatus.
  • the pressurizer and its operating unit are joined by a shaft penetrating the mantle structure of the evaporating apparatus.
  • the point of penetration is sealed with a shaft seal.
  • the bearing is carried out either by roller means or by slide bearing, wherein oil is used as a lubricating agent.
  • the evaporating apparatus is primarily characterized in that at least one pressurizing unit of the evaporating apparatus and at least one operating unit of the same are integrated as a compact structure which is placed as a whole in the space limited by the mantle structure.
  • the evaporating apparatus ac ⁇ cording to the invention particularly the structure of the pressurizing unit and the operating unit, is very simple and makes it possible to place the whole unit hermetically inside the evaporating apparatus or the pipework in direct connection therewith.
  • Cooling and/or lubrication of the operating unit and its bearings can be carried out using a fluid, particularly water, present in or supplied to the evaporating system.
  • a fluid particularly water
  • the dynamic sealing points required by shafts penetrating the mantle structure can be eliminated by the evaporating apparatus ac ⁇ cording to the invention.
  • the operating unit When the operating unit is placed inside the mantle structure of the evaporating apparatus, its warming-up energy can be utilized in the evaporating process itself.
  • the bearing can be carried out by the contact-free principle, wherein particles are not formed during the use which could possibly spoil the process, thus contributing to the improvement of the quality of the evaporating process. It is obvious that the hermetically closed integrated structure of the evaporating apparatus does not cause noise in the environment.
  • the evaporating apparatus of the invention is characterized in that the revolving speed of the operating unit is chosen in the so-called high-speed range, wherein it is 2.5 x 10 4 to 3 x 10 5 revolutions per minute, advantageously 3 x 10 4 to 7 x 10 4 revolutions per minute.
  • a significant advantage of the invention is the fact that the in- tegrated compact structure makes it possible to dampen the pressur ⁇ ized steam produced by the pressurizing unit and thus to saturate the steam by a simple construction that can be placed in connection with the integrated structure.
  • the pressurizing unit produces steam in superheated state. It is obvious for a man skilled in the art that superheated steam requires an increase in the heat-exchanging surface of a heat exchanger if the steam produced by the pressurizing unit is supplied to the heat exchanger in superheated state.
  • the evapo ⁇ rating apparatus it is possible by simple measures to moisten the steam advantageously in connection with an integrated compact structure so that the steam pressurized by the pressurizing unit is supplied to the heat exchanger substantially as superheated steam.
  • Fig. 1 shows schematically the evaporating process of the evapo- rating apparatus according to the invention as a whole
  • Fig. 2 shows a cross-sectional view of the integrated compact structure, an embodiment thereof, and
  • Fig. 3 shows schematically an embodiment of the evaporating ap ⁇ paratus, wherein the evaporating apparatus comprises two or several integrated compact structures.
  • the evaporating apparatus for concen- trating a fluid comprises a substantially closed hermetic mantle struc ⁇ ture 1 for carrying out the concentration process in a space limited by the mantle structure 1.
  • the fluid to be concentrated is led via a pipe ⁇ work 2 to an inlet 3, through which the fluid to be concentrated, pene ⁇ trating the mantle structure 1 , is conveyed from the upper part of the mantle structure 1 to the evaporating side, i.e. to the first side 5, of a heat exchanger 4.
  • the steam evaporated from the fluid to be concen ⁇ trated is sucked from the lower part of the mantle structure through a suction opening 8 of a vertical channel 7 comprising an integrated structure 6 to a first guide vane 9 of the integrated structure and further to a blade wheel 10, after which the pressurized steam, which has a higher thermal capacity and thus also a higher temperature, is led through a second guide vane 11 to a ring channel 12.
  • the latter end in the flow direction of the integrated structure 6 comprises means 13 for feeding water to be mixed with the steam phase to be supplied to the condensing side, i.e. the second side 14, of the heat exchange surface.
  • a first outlet 15 is provided for discharging the concentrated fluid part, i.e. the concentrate, from the space limited by the mantle structure 1.
  • the fluid to be concentrated flows through the heat exchanger 4 on the first side 5 of the heat exchange surface to the lower part 1a of the mantle structure, wherein the steam phase developed therein is conveyed in a manner described above to the channel 7 (arrows N in Fig. 1).
  • the mantle structure 1 comprises a receiving part 1a underneath the heat exchanger and a second outlet 16 in connection with the receiving part 1a for discharging the water separated from the fluid to be concen ⁇ trated, i.e.
  • both the concentrate and the con ⁇ densing water are led through the heat exchangers 17 and 18 to further processing, wherein the fluid to be concentrated is supplied via the pipework 2 through said heat exchangers 17 and 18 inside the mantle structure 1. In this manner the thermal capacity of the above-mentioned fractions produced by the evaporating process is substantially re ⁇ claimed and returned to the evaporating process.
  • the evaporating apparatus comprises a control unit 19 for con- trolling, in a manner to be disclosed more closely further on, the flow of water to be directed into the integrated structure, on one hand for cool ⁇ ing the operating unit and on the other hand for adding water to be mixed with the steam phase.
  • the flow of water is led via the pipe ⁇ work 20, the control unit 19 controlling a valve 21 in the pipework.
  • the channel 7 also comprises a sensor means coupled with the control unit 19, particularly at least one sensor means 22 for monitoring the pressure and the temperature.
  • the integrated structure 6 comprises a combination of a pressurizing unit 6a (blade system 9, 10, 11) and its operating unit, particularly an electric motor 6b, the combination being structurally assembled as one com- pact unit.
  • the integrated solid structure is a compact unit placed inside the pipe section 25 forming the outer wall of the channel 7 so that the longitudinal axes of the pipe section 25 and the integrated structure 6 are parallel and coaxial, wherein the above-mentioned ring channel 12 is formed between the pipe section 25 and the outer surface of the in- tegrated structure 6 particularly in the part following the pressurizing unit 6a seen in the flow direction (upwards in Fig. 2).
  • the operating unit 6b is placed in the ring channel, following the pressurizing unit 6a in the flow direction of the steam phase.
  • the part of the ring channel 12 that follows the pressurizing unit is formed as a diffusor part by expand ⁇ ing the diameter of the pipe section 25 towards the upper end in the flow direction. It is naturally possible to arrange the order of the pressurizing unit 6a and its operating unit 6b also reverse in the flow direction, wherein a separate diffusor part can be placed in the structure in its longitudinal direction following the pressurizing unit.
  • the parts 6a, 6b and 25 can be arranged as an integrated structure, wherein a protruding attach ⁇ ment flange 26 is provided in the upper part of the structure for fixing the structure e.g. in a manner shown in Fig. 1 centrally on the vertical centre line of the heat exchanger and the mantle structure with a circu ⁇ lar horizontal cross-section so that the central axis of the integrated compact structure 6a, 6b, 25 joins the vertical central axis of the mantle structure.
  • the lower part of the channel 7 is thus formed as a solid structure 7a (Fig. 1), wherein the joint between the pipe section 25 and the lower part 7a of the channel 7 is provided with suitable sealings 27.
  • the integrated structure 6 shown in Fig. 2 comprises end parts 28 and 29 as well as a shell part 30 in the longitudinal direction of the channel 7 therebetween.
  • the guide vanes 9, 11 are fixed on one hand to the shell part 30 and on the other hand to the inner surface of the pipe section 25, and the blade wheel 10 is, in turn, fixed to a longitudi ⁇ nal shaft 31 inside the integrated structure, this shaft forming also the rotor of the electric motor used as the operating unit.
  • a stator part 32 is provided outside the rotor part 31 of the shaft 31 and inside the shell 30.
  • the integrated structure comprises at both ends of the stator part 32 contact-free radial bearings 33 and 34 as well as an axial bearing 35.
  • the required electric inlets can be provided e.g.
  • the operat ⁇ ing unit is provided with a cooling channel system 36, 37, 38.
  • a water flow is arranged here in a manner described above in connection with Fig. 1 , which flow can under special conditions also be a steam flow supplied to the operating unit from other parts of the evaporating process, e.g. from the lower part of the mantle structure. At least part of this water flow that is led through the pipework 20 is conveyed to the ring channel 12 or to its end through a nozzle structure 13 which in the presented embodiment is formed in connection with the latter end 29 of the integrated structure 6.
  • the end 29 is formed as a rotable disk-like structure, wherein its inner part is provided with a container part or a ring cavity 39 into which the water flow runs from the cooling channel system 36, 37, 38.
  • the end 29 is fixed to the shaft 31 and sealed in re ⁇ lation to the end 40 of the outer part 30a of the shell.
  • the cooling channel system comprises a first part 36 forming an ex ⁇ tension to the pipework 20 and running through the second guide vane 11 to the shell part 30.
  • the shell part of the operating unit 6a comprises two parts, wherein the second part 37, e.g. a ring-like space, of the cooling channel system is formed in the longitudinal direction of the integrated structure 6 between the outer 30a and inner 30b part.
  • the first part 36 of the channel system may comprise several sections, wherein the supply of the water and/or steam flow is carried out in the direction of the periphery from two or several points to the second part 37 in connection with the integrated structure 6.
  • the cooling chan ⁇ nel system is used for cooling the electric motor operating as the supply unit.
  • the third part of the cooling channel system is formed of a control part 38, from which the water or steam flow is led to the above-men ⁇ tioned ring cavity 39 and further by centrifugal force to the nozzles 13.
  • Figure 3 shows an alternative embodiment of the invention, wherein the mantle structure is connected with a circulating pipe 41 , said circulating pipe being substantially arranged to form an hermetic unit with the mantle structure.
  • the direction of the steam flow is indicated by ar ⁇ rows KS in Fig. 3.
  • the mantle structure corresponds in applicable manner to the structure presented previously in Fig. 1 , and being thus obvious to a man skilled in the art, it will not be illustrated in more detail in this context.
  • the integrated compact structure is placed in the circulating pipe 41.
  • the integrated compact structure comprises two parallelly placed independent units 6', 6" fixed to the connecting pipe by means of a flange structure 42.
  • the integrated compact struc- tures 6' and 6" can be easily demounted and replaced.
  • the units may correspond to that presented previously in con ⁇ nection with Fig. 2.
  • the integrated compact structure can be carried out by the radial principle instead of the pressurizing unit operating on the axial principle as shown in the figures.
  • the pressurizing unit can also comprise several stages.
  • the revolving speed of the shaft 31 of the operating unit is chosed from the so-called high-speed range, wherein it is 2.5 x 10 4 to 3 x 10 5 revo ⁇ lutions per minute, advantageously 3 x 10 4 to 7 x 10 4 revolutions per minute. It is obvious that several means for carrying out the water addi ⁇ tion can be placed in series in connection with the integrated compact structure, wherein the energy required by the jets can be arranged also in other ways.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

Un système d'évaporation pour concentrer l'eau comprend une structure à chemise extérieure (1), des admissions et des évacuations (3, 15, 16), un échangeur thermique (4), une unité sous pression (6b) et son unité de commande (6a). L'invention est caractérisée en ce que l'unité sous pression (6b) et son unité de commande (6a), notamment un moteur électrique, sont conçues comme une structure compacte intégrée (6) placée en totalité dans l'espace limité par la structure à chemise extérieure (1).
EP95907665A 1994-02-03 1995-02-03 Appareil d'evaporation Ceased EP0744983A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI940495 1994-02-03
FI940495A FI95102C (fi) 1994-02-03 1994-02-03 Haihdutinlaitteisto
PCT/FI1995/000046 WO1995021009A1 (fr) 1994-02-03 1995-02-03 Appareil d'evaporation

Publications (1)

Publication Number Publication Date
EP0744983A1 true EP0744983A1 (fr) 1996-12-04

Family

ID=8539888

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95907665A Ceased EP0744983A1 (fr) 1994-02-03 1995-02-03 Appareil d'evaporation

Country Status (7)

Country Link
EP (1) EP0744983A1 (fr)
JP (1) JP3844252B2 (fr)
AU (1) AU1579095A (fr)
CA (1) CA2181277A1 (fr)
FI (1) FI95102C (fr)
MX (1) MX9603020A (fr)
WO (1) WO1995021009A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200367389Y1 (ko) * 2004-08-23 2004-11-10 이종화 유동 세정구를 가진 다관(多管) 회전식 증발 농축 장치
WO2015014387A1 (fr) * 2013-07-29 2015-02-05 Francois-Mathieu Winandy Procedes et installations de dessalement d'eau par distillation a compression mecanique de vapeur
WO2016138343A1 (fr) * 2015-02-27 2016-09-01 Caloris Engineering, LLC Système compact d'évaporateur à recompression mécanique de vapeur

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1642491A1 (de) * 1967-05-06 1971-05-06 Ghh Man Anlagen Verfahren und Vorrichtung zum Herstellen von Suesswasser aus Meerwasser
US4186058A (en) * 1976-04-28 1980-01-29 Fogel S J Method and apparatus for high volume distillation of liquids
SE429647B (sv) * 1982-01-20 1983-09-19 Bjorn Elmer Sett och anordning for att minska behovet av tillford energi vid destillationsprocesser

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9521009A1 *

Also Published As

Publication number Publication date
FI95102B (fi) 1995-09-15
FI95102C (fi) 1995-12-27
JPH09508313A (ja) 1997-08-26
WO1995021009A1 (fr) 1995-08-10
FI940495A0 (fi) 1994-02-03
CA2181277A1 (fr) 1995-08-10
AU1579095A (en) 1995-08-21
JP3844252B2 (ja) 2006-11-08
MX9603020A (es) 1997-06-28

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