DE2418045A1 - MIXING CAPACITOR - Google Patents

Description

F 1486

Gebr. Böhler & Co., Aktiengesellschaft, Vienna

Mi sh capacitor

Mixing capacitors are known. In chemical process engineering, especially in the vacuum field, In many cases "liquid is sprayed into a vapor space by means of nozzles, with the vapor flowing onto the fine droplets of liquid condensed. By baffles υ.dp;!, The to Condensation 'available liquid surface can be further enlarged. For use in a two-stage evaporation process, this embodiment has, among other things, the night that there is in circulation the second evaporator stage inevitably result in two free surfaces at different pressure levels, which is why both for operation and an extensive one, especially for the start-up and shutdown status Regular effort is required. Furthermore, the removal of the non-condensable gases causes certain difficulties.

Furthermore, it is great, especially for warming up Liquid quantities are known to inject steam through special nozzles into the liquid, where it is removed from the liquid is condensed. This method is in the known

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Forms of guidance unsuitable if the steam has only a small temperature difference and a slight overpressure compared to the liquid, because then complete condensation of the steam is not ensured with full technical effort. ^l

Surprisingly, there is complete condensation of the steam or the vapors in a co-condenser of the The above type is guaranteed if it is prevented that the vapor threads rising in the water become larger Combine vapor braids whose contact level with the liquid is smaller than the sum of the contact areas of the individual vapors. This condition becomes according to the invention fulfilled in that baffles or the like. are provided, which the union of several from the outlet openings Prevent steam threads from escaping from the distributor device and / or that these outlet openings have a sufficiently large distance from one another so that they are united several steam threads to the larger Dampfzönfon whose the Condensation available surface remains the same or increases. Will the steam vents Arranged in straight or curved, e.g. circular rows and the rows individually or in groups through the baffles or the like. separated from each other, so should be within the rowoa the distance between the drainage openings correspond from center to center at least half the circumference of a single steam outlet opening, preferably to be taller. A particularly favorable embodiment is obtained when the section in which the vapor in the liquid rises a main condensation zone, which is followed by a post-condensation zone, in which the liquid together with the remaining steam and the possibly non-condensable gases at least horizontally or approximately in a section of this zone

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flows horizontally. This will remove any small residues given the opportunity of condensation in the water of non-condensed steam and thus the removal of steam residues prevented, yes, but a discharge of the inconclusive Gases from the mixing condenser allows. Dia aimed at Resfondensation can be achieved by built-in components such as Knitted wire nails, to be improved, with such Internals advantageous in the section of at least approximately be arranged horizontally. Furthermore, for funding, post-condensing in the Post-condensation zone cool liquid can be snowed in.

In the drawing, the subject matter of the invention is shown in an exemplary embodiment. It FIGS. 1 and 2 show a mixing capacitor in the longitudinal direction Cross-section.

The vapor to be condensed is fed to the mixing condenser 1 from above and passes through a central pipe 2 into the distributor device 3, which is connected to the central pipe P by means of distributor channels 4 arranged in a star shape. The distribution device 3 has upwardly directed bores 5 which are arranged evenly distributed in two rows. A pipe 6 is provided between the rows, which prevents the vapors emerging from the bores 5 from coming together between the rows, so that they can largely condense.

The distance between the holes 5 within a row is chosen so large that the vapor threads do not unite with each other within a row. It can be useful not to prevent the union of the vapor threads within a row, but instead to ensure that with such a combination to a steam pigtail the entire contact surface formed thereby with the liquid is equal to or greater than the sum

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~ ⁴ ". F 1486

2Ä18045

of the contact surfaces of the steam threads before their union. This is the case, for example, if the distance between the neighboring Holes in a row is equal to or larger than half the hole circumference. If the holes are circular, the distance a should be from center to center of the holes be equal to or greater than -5-. Unite two Adjacent vapor threads in a row, the minimum size of the new vapor braid would be around 2a + Dft, i.e. the same or something larger than 2D7i what the sum of the original The amounts of vapor threads would correspond.

Above the tubular guide plate 6, two sheet metal rings 7, 8 are provided at a distance, one of which sits close to the pipe and the other is firmly connected to the jacket of the condenser. The ring 7 leaves a gap between its edge and the capacitor jacket and the ring 8 leaves a ring ring to the central tube 2 open. The area between the two rings 7 and 8 forms a post-condensation zone 9, which adjoins the main condensation zone 10. The liquid, which has now been heated, is deflected between the rings 7 and 8 and flows through the post-condensation zone horizontally, an annular wire mesh packet 11 exerting a condensation-promoting effect in this area. It can also, as shown in FIG 1, a part that Stutzten 12 flowing cooling liquid into the Nachkondensationszone ° through the annular channel 1 * by -. Be performed where it is mixed with the incoming from the main condensation zone 10 fluid.

After the liquid has passed through the After-condensation zone 9, all Brüdendäinnfe are completely condensed. The "liquid leaves the co-condenser with the entrainment of non-condensable gases through the connecting piece 14 ·.

The mixing condenser according to the invention has proven itself particularly in a two-stage evaporation process, in which the vapors of the first Verdanroferstufe by the

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circulating water is condensed in the second evaporator stage be lind the circumferential, under corresponding, of the second stage circulating pump is under pressure Heat the water so far that the latter takes the second stage in the subsequent expansion device of the vapor body again - partially evaporated. Only with the invention With the mixing condenser, so perfect condensation was achieved that the process described was possible Decontamination factors have been achieved. In addition, the mixing condenser according to the invention requires fewer external ones Control effort and shows good partial load behavior. Furthermore it is inexpensive due to its compact design. '

The invention is not limited to the illustrated embodiment. So can more than two Rows of holes are provided. With a larger number of rows of holes, two or more rows of holes can be used be separated from each other by baffles or pipe sockets. The arrangement of the rows of holes can also take place in a star shape and accordingly the baffles can also be arranged radially. Furthermore, the inventive Mixing condenser can be operated according to the countercurrent principle.

Under an approximately horizontal flow of liquid in the post-condensation zone there is a flow of water to understand at most x. of such a slope that possibly existing vapor bubbles of the liquid flow not or do not lead significantly.

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Claims (5)

" ⁶ ~ F 1486 Patent claims: O. (3 ^ / mixing condenser, in which the 'steam over a distribution device with a small overpressure in one Liquid is introduced and rises in it, characterized in that baffles (β) or the like. are provided, which consist of the union of several the outlet openings (5) of the distributor device (3) prevent escaping steam threads and / or that these outlet openings have a sufficiently large distance (a) from each other hoof ways, thus with a pollution several vapors to form larger vapors with the same surface area available for condensation remains or increases. 2. Condenser according to claim 1, characterized in that the steam outlet openings (5) in straight lines or crimped, e.g. circular, rows are arranged, the rows individually or in groups through the guide plates (6) or the like. are separated from each other and within the rows the distance (a) between the Danraf outlets of Center to center corresponds to at least half the circumference of a single steam outlet opening, preferably is larger. 3. Condenser according to claim 1 or 2, characterized in that the area in which the steam in the .Liquid rises a haunt condensation zone (10) forms, to which a post-condensation zone (9) is then provided, in which the liquid together with the remaining steam and any non-condensable gases flows horizontally or approximately horizontally at least in a section of this zone. 4. Condenser according to claim 3, characterized in that in the post-condensation zone (9) * preferably in the section of the at least approximately horizontal liquid flow, Internals, e.g. wire mesh packages (11), are arranged. 5 0 9825/0250 - 7 - F 1486 5. Capacitor according to claim 3 or 4, characterized
characterized in that cool liquid is admixed in the region of the post-condensation zone (9). Gebr. Böhler & Co Aktiengesellschaft
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