DE1519979A1 - Sieve bottom arrangement with inner overflow wall - Google Patents

Description

DRS. OWL & BERG DIPL-ING. STAPF

PATENT LAWYERS

* Dr. Owl, Dr. Berg, Dlpl.-Ing. Stapf, B Munich 2, Hilblestr.

MUNICH 2, den

HIIBLESTRASSE 20

r-

Telephone 60838

Telegram addr. ι PATENT UNION MOndia Bank details! Bayerische Vereinsbank Munich 453100 PosUcheck account Munich 65343 Your sign

Our sign Vl / Gct 13 447

Lawyer files ~ No. _o 13

Centraine Biuro K-onstrukcji Kotlowych Tarnowskie GOry, ul Opolska 23 / Poland.

"Sieve bottom arrangement with internal overflow wall."

The subject of the present invention is an upper floor assembly with an inner overflow wall that is wide Area the capability of a device to ii a game about degassing the feed water in steam boilers guaranteed.

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The use of overflow trays in water preparation systems is known, z.j3, in thermal degassers, in which so-called injection screens are based on the principle of different Heights fortified dams are built, in which the water from higher positions to lower, so-called Floors or distribution plates that are only equipped with extreme walls that prevent operation Allow the system only in a limited range of its capacity, e.g. from $ 30 to $ 100.

Lies shortage has so far been ignored and only systems have been built that can be used 50 - 100 ^ ö. Even the possibility of overloading the degasser and their effect on the continuous degassing of the boiler water flowing through were not taken into account.

The water degassing process has not yet become theoretical practically completely mastered and in companies that produce the relevant devices, different Degassing methods have been used, but the results obtained are not always satisfactory.

The application area of the device for degassing Liquids is limited, on the one hand by the need to maintain a certain minimum

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Height of the liquid layer on the individual floors, and on the other hand by the height of the outer overflow edges, which limit the accumulation of the liquid on the given floors. The height of the liquid layer on the floors is recommended differently in different publications, e.g. 25 - 150 mm. However, there are also various types Soils that have lpe ine edges at all or that even have the shape of a Rostee.

The aim of the invention is to remedy the deficiencies and shortcomings mentioned. According to the invention, this was achieved by the fact that the individual sieve trays attached to the (} | ^ | 4§ ^, additional inner overflow waiule »· 2 · Β.» In the form of tires, which with their plane right-win3c | i'§ .. _; fu The Reilewähde are correspondingly lower compared to the outer and inner walls, and at the same time form a regulation of the flow rate of the liquid to be degassed. To increase the efficiency of these devices, inner overflow walls are used, which Limit the overflow of the liquid alternately once in one direction and once in the other direction.

The sieve trays with the inner overflow wall according to the invention are illustrated for example in the accompanying drawing, which is a vertical axial section through

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represents a rotationally symmetrical degasser and the irrigation of the liquid on three successive floors.

Fig »1 shows the basic arrangement of the floors with the inner overflow wall,

Fig. 2 is a plan view of the same device at the level of the upper floor,

Fig. 3 is a plan view at the level of the middle tray, Fig. 4 is a plan view at the level of the lower tray.

Fig. 5 shows the flow of liquid and vapor under normal load,

Fig. 6 shows the flow rate at maximum load.

As can be seen from FIG. 1, the sieve trays have inner overflow walls 1 and outer overflow walls 2, full base attachments 3, an outer jacket 4 of the degasser and rib-like fastenings of the floors 5.

The sieve tray system shown in FIG. 1 has not only traditional perforated trays A, B, but also traditional ones outer walls 2, correspondingly lower and correspondingly attached additional inner overflow walls 1 » These inner overflow walls limit the individual floors alternately from one side and then from on the other hand, the reason separated out in this way -

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perforation of these floors. This perforation is located on each tray between the extreme diameters D, D. the Partial circles of the openings through which the degasser is operating in the range of its low performance Liquid as a result of gravity in the form of rainy ones Droplets flowing down. The gaseous medium flows upwards in countercurrent in the degasser. The gaseous medium can not only flow through the cutouts provided in the shelves or next to the shelves, but also, as in 5, through the empty openings located between the inner wall 1 and the outer wall 2, After a certain predetermined output has been exceeded, the excess liquid flows through the openings the basic perforation of the floors can no longer pass through the overflow walls 1 on their other side and fills the space of the additional perforation of the floors, the individual floors thus have apart from the basic perforation with one power from 30 - 1005fe of the degasser, one alternately offset external or internal perforation, which increases the efficiency of the degasser by up to $ 300. The increase in the performance of the degasser takes place in such a way that, after the basic perforation has been flooded, the perforations limited by the diameters D, D, Soils, the liquid over the overflow edges of the Inner walls 1 to the alternately offset outer perforation,

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which is limited by the extreme diameters of the pitch circles of the openings D. and Dp (Fig.1), as well as alternating with the offset opposing inner perforations, which are determined by the extreme diameters of the pitch circles of the openings Dc and Dg (Fig, 1) is limited, overflows. The flow of the gaseous medium in the apparatus then only takes place through the cutouts specially made for this purpose, as in Fig. 6 shown. Finally, filling in the Floors up to the edges of the outer walls 2 maximum performance of the device,

Patent claims:

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Claims (1)

Claim 1 · Si eb "floor plan especially for the degassing of Liquids, with an inner overflow wall built into the degasser jacket, consisting of a perforated one Floor with one or two extreme walls, steam flow cutouts and a non-perforated point, characterized in that it has additional inner overflow walls (1) which are correspondingly lower than the extreme overflow walls (2), which are fundamentally eliminated Limit the perforation of the trays (A and B) alternately and cause a variable liquid degassing capacity. 2> Sieve tray arrangement for the treatment, in particular degassing of liquids, in which the liquid to be degassed flows through several sieve trays arranged one above the other from top to bottom, which have passage openings for gaseous media separated from the sieve areas by vertical baffles, in particular according to Claim 1, characterized in that that the sieve areas on top of one another only partially cover a sieve tray and that within the sieve area of each sieve tray an additional lower retaining wall is provided which separates the part of the sieve area that overlaps with the sieve areas of the adjacent sieve trays from the rest of the sieve area. 909829/1267