DE2621061A1 - METHOD FOR GENERATING WATER VAPOR AND EVAPORATOR FOR CARRYING OUT THE METHOD - Google Patents

Description

PATENTANWÄLTE DIPL-INQ. A. WEDDE DiPL.-ING. K. EMPL

Banks: Deutsche Bank No. 65/22 6O1 Bayer. Mortgage bank number 172/2OO2 Post check Munich No. 47 392-8O3

262ΤΌ6

8 MUNICH 3 O Schumannstr. 2 - Tel. (089) 47 ':; 4? Telegrams: Patentwadde - Mßn; ran

! 17ES-OAIL BABGOGK S ₀ A <

Paris, France

May 12, 1976

File ι Ρ 23 042

7experienced in generating water vapor and evaporator for carrying out the process

The invention relates to the generation of water vapor of the evaporating condensed to an enemy with Heisdampf which _s nrährsnd © r successively by indirect heat exchange along alternate paths tube bundle ₅ flows through what © in a steam chamber submerged Sindo

There are already a number of τοη evaporators, di® after one such 7 @ rfahrsn

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Information on the Fernä; .-: i

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The invention is based on the object of modifying the operation of this evaporator by means of a special arrangement, which allows a unit with less space requirements including an additional heating tube bundle to realize, which by that at the exit from each The condensate collected by the bundle through which the heating steam flows is heated.

6-enauer said "the invention relates to a process for the production of _{'water-vapor-9} according to which the is brought water to be evaporated in indirect heat exchange with heating steam, which condenses _P while successively along alternate paths tube bundle flowed through which sindj in a steam comber submerged, characterized in that said tube bundle are traversed in the ascending direction by the heating steam ,, that wirdj separated from feathers bundle of BaEpf of the resultant condensate at the outlet of the separation rei particular along z? and oppositely directed paths takes place _s and that the collected condensate is used ,, to carry out additional heating of the water to be steamed through indirect heat exchange at the bottom of the steam chamber ο

Si © also relates to an evaporator for implementation of the method with a plurality of tubes ^ which in arranged one on top of the other and distributed one after the other along alternating paths through which the heating steam flows

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and submerged in a steam chamber which forms part of a horizontally elongated shell, wherein the steam boiler is characterized in that it also comprises:

- Means for bypassing the heating steam emerging from the tubes of each bundle into the tubes of the upper bundle,

a device for draining and collecting the condensate formed at the outlet of the tubes of each bundle Condensate at the bottom of the jacket outside the steam chamber, and

- an additional bundle of tubes, which are placed submerged at the bottom of this chamber and through their Ends with the condensate collected outside the chamber stay in contact.

More precisely, it concerns a vaporizer with:

- a horizontally elongated coat,

- two vertical circular plates which divide the interior of the shell into two outer chambers and one in between Divide the steam chamber, which is fed with the water to be evaporated at its bottom and at its the upper section is provided with at least one exhaust pipe for the generated steam,

a plurality of tubes arranged in the steam chamber, the ends of which are attached to each of the circular plates are attached, with the pipes in parallel bundles

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are divided, which in turn are traversed by heating steam along alternating paths, which in an in one of the outer chambers arranged feed head introduced , the vaporizer being characterized in that it further comprises:

- at least one arranged in one of the "two outer chambers Box for bypassing the steam emerging from the tubes of a bundle into the tubes of the upper bundle, wherein the diversion from the penultimate to the last bundle takes place through one of the two outer chambers and the box or the boxes have a drainage opening for the condensate formed in the tubes of the lower bundle,

- at least one collecting pipe for the drained condensate, each pipe receiving the condensate drained from a box located in the outer chamber, which the out The condensed steam emerging from the tubes of the last bundle receives the tube or tubes against the wall penetrate this outer chamber,

- A line outside the jacket for introducing the condensate received in the pipe or pipes into the Bottom of the opposite outer chamber,

- an additional tube bundle arranged at the bottom of the steam chamber, the ends of the tubes at each of the circular ones Plates are attached so that the condensate flows through these pipes between the bottoms of the two outer chambers for heating the water to be evaporated on

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Take care of the bottom of the steam chamber,

- A device for adjusting the level of the condensate at the bottom of one outer chamber, so that the flow of the condensate in the pipes of the additional bundle guaranteed is,

- a device for adjusting the water level in the steam chamber so that the tubes of all bundles are submerged are and

- An outlet pipe for the condensate from the jacket, this pipe being arranged at the bottom of the outer chamber, which the steam condensate emerging from the pipes of the last bundle receives.

According to an advantageous embodiment, the evaporator has at least one additional pipe for receiving the condensate on, each additional pipe collecting the condensate which is arranged in the outer chamber from one Box is drained, which opposite the condensed steam emerging from the tubes of the last bundle receiving chamber is arranged, wherein the additional pipe or pipes penetrate the wall of this outer chamber, to feed the line outside the jacket.

According to another embodiment of the invention, in particular for the event that the filling losses are low, has the evaporator has at least one suction pipe, each immersion pipe collecting the condensate that flows from one in the

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condensed emerging from the tubes of the last bundle Steam-absorbing outer chamber opposite outer caraisier arranged box is drained, wherein the or the flue pipes lead the condensate to the bottom of this outer chamber ο

According to a simplified embodiment of the invention If the evaporator has three tube bundles, which one after the other in an ascending direction along alternating paths are flowed through by the heating steam, as well as a single bypass box between the tubes of the first and second bundle, the box being arranged in an outer chamber which is the one emerging from the tubes of the last bundle absorbs condensed steam, and a single manifold for the condensate drained from this box, this pipe penetrates the wall of this chamber and is connected to the line outside the jacket, to introduce the condensate at the bottom of the opposite outer chamber to it the tubes of the additional bundle to flow through.

A non-limiting embodiment is shown in FIG Drawing shown and is described in more detail below.

Show it:

Pig. 1 shows a longitudinal section through the inventive Yerdampferj

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Pig. Figure 2 is a section along lines A-A and B-B of Figure 1;

! ig. 3 shows a section along the line G-C of FIG. 1; and

FIG. 4 shows a section along the lines D-D and E-E in FIG. 1.

In the drawing, the evaporator is circular with one horizontally elongated jacket 1 and two vertical ones Plates 2 "or 3 illustrates, which the interior of the shell 1 in two outer chambers 4" or 5 and in an intermediate one Divide the steam chamber 6 ", The water to be evaporated is fed to the chamber 6 at its bottom. to for this purpose, it has an inlet pipe 7 which is connected to a horizontal shower body 8 “on its The upper section is the chamber 6 with two exhaust pipes 9 or «. 10 equipped for the generated steam and stands with the tube 9 via an intermediate dryer 11 and with the tube 10 via an intermediate dryer Dryer 12 in connection »Between the two dryers a manhole 13 is provided at the upper portion of the chamber 6

The water to be evaporated is heated by steam, which is fed through a pipe 14 into a chamber 4 Feed head 15 is introduced, the tube 14 penetrating the wall of the chamber. The heating steam feeds in sequence in an ascending direction and along

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alternating paths three tube bundles 16, 17 and 18. The ends of the tubes are attached to each of the circular plates 2 and 3 ″. The tubes of the lower bundle 16 are fed directly via the feed head 15 The bypassing of the steam emerging from the tubes of the bundle 16 into the tubes of the middle bundle 17 The steam emerging from the tubes of the bundle 17 enters the chamber 4> flows through it and penetrates the tubes of the upper bundle 18 _o The completely condensed , Vapor emerging from the tubes of the bundle 18 goes directly into the chamber 5. The number of tubes forming each bundle decreases progressively in an increasing direction Steam arises in the tubes of the bundle 16. The condensate emerging from the tube 20 is taken up by a collecting tube 21 which penetrates the wall of the chamber 5 _o This pipe is in connection with a pipe 22 located outside the shell 1, which led the collected condensate to the bottom of the chamber 4 The condensate formed in the course of the second path of the steam in the pipes of the bundle 17 is collected at the bottom of the chamber 4, while that in the course of the third path of the steam in the ear. of the bundle 18 resulting condensate is collected at the bottom of the chamber 5o

An i-.isätalieiies bundle 23 of tubes, the ends of which at each

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der'kreisiform plates 2 and 3 are attached, is on The bottom of the steam chamber 6 is arranged near the shower body 8. The tubes of the bundle 23 »those of the one between the ground the chamber 4 and the bottom of the chamber 5 circulating condensate are flowing through, create at the bottom of the steam chamber 6 an additional heating of the water to be evaporated »that from the tubes of the bundle 23 into the bottom of the The condensate emerging from chamber 5 is drained from the jacket 1 through a drain pipe.

Leveling connections 25 and 26 fastened to the wall of the chamber 4 enable by means of a device not shown the level adjustment of the condensate in the bottom of the üLammer 4, so that the flow of condensate in the Tubes of the bundle 23 is ensured «In addition, conventional means, not shown, allow the water level in of the steam chamber 6 so that the tubes of the bundles 16, 17, 18 and 23 are completely submerged.

The chamber 5 is at its upper portion with a pipe 27 for extracting the non-condensable parts of the steam and equipped with a manhole 28 at its central section. In the same way, the chamber 4 is provided with a manhole 29 at its central section.

The steam chamber 6 is divided into several sections by vertical supports 30

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The device described enables the evaporation of the V / ater contained in the chamber 6 by heating steam, which changes in sequence in an increasing direction and along Tracks the tubes of the bundle 16, 17 and 18 flows through, while the exit from each tube bundle from Steam separated condensate is directed down to additional heating of the water at the bottom of the steam chamber 6 to create ο

Although the invention has been described with reference to a particular embodiment, it is of course not limited to these, and changes can be made to it without departing from the scope of the invention will ο

For example, the number of tube bundles through which the heating steam flows, which in the example shown is three has been chosen, can be increased, for example to four or five bundles.

In the case of an embodiment with four bundles, a box similar to box 19 would have to be provided in chamber 4, in which the feed head 15 is arranged and into which the condensed steam emerging from the tubes of the fourth bundle passes. This box takes care of the bypassing of the steam from the pipes of the second into the pipes of the third bundle _o The collecting pipe for the

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sem box drained condensate penetrates, similar to the pipe 21, the wall of the chamber 4, to feed the line 22 which carries the condensate to the bottom of the chamber 5. The leaked condensate from the box 19 is then collected by the pipe 21 forming a supplement, which the Y / and the chamber 5 penetrates to also the line 22 to feed «In the case of low filling losses, this additional tube can be replaced by a dip tube, which leads the condensate emerging from the box 19 to the bottom of the chamber 5.

In an embodiment with five bundles, a second, the box 19 similar box in the chamber 5 and a similar one Box in the chamber 4 are provided. The latter contains the feed head 15, while the one from the Condensed steam escaping from the tubes of the fifth bundle enters the chamber 5. The one from the boxes in chamber 5 escaping condensate is taken up by two pipes corresponding to pipe 21, which form the wall of this chamber penetrate and feed the line 22 which led the condensate to the bottom of the chamber 4 that from the box in this Chamber drained condensate is then taken up by an additional pipe that penetrates the wall of the chamber 4, to also supply the line 22, In the event of low filling losses, this additional pipe can be replaced by a dip pipe that carries the condensate to the Bottom of chamber 4 leads <,

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In general, the condensate drained from the boxes, which condensed in the that exiting from the last bundle Steam-absorbing outer chamber are arranged, collected in tubes that form the wall of said chamber penetrate and feed the external line that carries the condensate to the bottom of the opposite outer chamber leads. The condensate emerging from the boxes located in the latter chamber is in additional pipes collected, which penetrate the wall of this chamber to also supply the external line. Im lalle of low filling losses, these additional pipes can be replaced by immersion pipes that carry the condensate to the bottom lead the chamber mentioned without penetrating its wall.

According to another embodiment, the bundles can be made from U-shaped tubes are made. The evaporator then only has a single circular plate, which is the steam chamber separated by a single outer chamber

In addition to the example shown, the invention comprises various ones weiter® execution options »

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Claims (1)

May 12, 1976 File: P 23 042 Claims α ) \ Process for the generation of water vapor, according to which the water to be evaporated is brought to indirect heat exchange with heating steam, which condenses, whereby it flows through bundles of tubes submerged in a steam chamber in succession along alternating paths, characterized in that these tube bundles in increasing direction are traversed by the heating steam, that at the exit from each bundle the steam is separated from the condensate formed, the separation taking place along two specific and opposite paths, and that the condensate collected is used for additional heating of the water to be evaporated to be carried out by indirect heat exchange at the bottom of the steam chamber. - H-609849/0675 2.) evaporator for performing the method according to claim 1, with a plurality of tubes, which in superposed and sequentially along alternating paths from Heating steam traversed bundles are distributed and submerged in a steam chamber, which is part of a horizontally elongated shell, wherein the steam boiler is characterized in that is that it also has: - Means for bypassing the heating steam emerging from the tubes of each bundle into the tubes of the upper bundle, a device for draining and collecting the condensate formed at the outlet of the tubes of each bundle Condensate at the bottom of the jacket outside the steam chamber, and - an additional bundle of tubes, which are placed submerged at the bottom of this chamber and through their Ends are in communication with the condensate collected outside the chamber. 3.) Evaporator according to claim 2 with: - a horizontally elongated coat, - two vertical circular plates which divide the interior of the shell into two outer chambers and one in between Divide the steam chamber, which is fed with the water to be evaporated at its bottom and at its upper section with at least one exhaust pipe for the 609849/0675 - 15 - generated steam is provided, a plurality of tubes arranged in the steam chamber, the ends of which are at each of the circular Plates are attached, the tubes are divided into parallel bundles, which alternate in sequence Paths are flowed through by the heating steam, which is introduced into a feed head arranged in one of the outer chambers, the evaporator thereby is characterized in that it also has: - At least one box arranged in one of the two outer chambers for bypassing one of the tubes Bundle of escaping steam into the tubes of the upper bundle, with the bypass from the penultimate to the last bundle takes place through one of the two outer chambers and the box or boxes has a drain opening for the have condensate formed in the tubes of the lower bundle, - At least one collecting pipe for the drained condensate, each pipe consisting of one arranged in the outer chamber Box receives drained condensate, which condensed the exiting from the pipes of the last bundle Receives steam, the pipe or pipes penetrating the wall of this outer chamber, - A line outside the jacket for introducing the condensate received in the pipe or pipes into the Bottom of the opposite outer chamber, - 16 • 609849/0678 - an additional tube bundle arranged at the bottom of the steam chamber, the ends of the tubes at each of the circular ones Plates are attached so that the condensate flows through these pipes between the bottoms of the two Outer chambers ensure that the water to be evaporated is heated at the bottom of the steam chamber, - A device for adjusting the level of the condensate at the bottom of one outer chamber, so that the flow of the condensate in the pipes of the additional bundle is guaranteed, a device for adjusting the level in the steam chamber so that the tubes of all bundles are submerged are and - An outlet pipe for the condensate from the jacket, this pipe being arranged at the bottom of the outer chamber, which the steam condensate emerging from the pipes of the last bundle receives. ■ -.) Evaporator according to claim 3 _? characterized in that it has at least one additional pipe for receiving the condensate, each additional pipe collecting the condensate, v / elciies from one in the? Outer chamber Aage arrange TSII box is discharged ,, which is opposite to the ä®n emerging from the Hoiirsxi dss le-izteia bundle kondezLsierten S-sc: pf receiving ICamasr say is t? where is the Ζιιείΐ-ΐΓ-οίη? or the additional pipes «Α Γ. . ■■ - 17th -. ο <η (5 b i. ι U ο 1 Wall of this outer chamber penetrate to the line
to feed outside the casing _o 5.) Evaporator according to claim 3> characterized in that it has at least one immersion tube, each immersion tube collecting the condensate which is condensed from one in the, from the tubes
the last bundle of emerging steam absorbing outer chamber opposite outer chamber arranged box
is drained, the dip tube or tubes leading the condensate to the bottom of this outer chamber. 6.) Evaporator according to claim 3 »daduroh characterized in that it has three tube bundles, which are flowed through sequentially in an increasing direction along alternating paths of heating steam, and a single bypass box between the tubes of the first and
second bundle, wherein the box is arranged in an outer chamber which receives the condensed steam emerging from the tubes of the last bundle, and a
only collecting pipe for the drained from this box
Condensate, this pipe being the wall of this chamber
penetrates and is connected to the line outside the jacket to introduce the condensate at the bottom of the opposite outer chamber to allow it to flow through the pipes of the additional bundle » 609849/067 Blank page