DE392397C - Apparatus for evaporation of liquids - Google Patents

Description

GERMAN EMPIRE

ISSUED
AM20.1ÄRZ1924

REICH S PATENT OFFICE

PATENT LETTERING

CLASS 12 a GROUP 2

(T 25461IVj rza)

Karl Lars Esaias Thunholm in Oerebro, Sweden.
Apparatus for evaporation of liquids. Patented in the German Empire on June 15, 1921.

According to the Union Treaty of June 2, 1911, the priority for this application is due to '
of the application in Sweden of June 21, 1920.

The invention relates to an apparatus for ι on the shaft for receiving the evaporation for liquids to dryness, j steaming liquids in particular of excess liquid: is ordered, of which according to the invention Sulphite cellulose, which already run out on relatively several tubes through which the

S high concentration 'has evaporated. The: liquid is distributed on the heating surfaces. Apparatus belongs to the genus in which, in a known manner, on each heating surface there is a number of ring-shaped heating surfaces arranged one above the other, a scraping device rotating with the shaft and a central heating surface. . tang. _ brought into action, which the rotating shaft is used, and the main dry precipitation from each heating surface, the most important innovation consists in the fact that above ·. able to scrape off.

The further details of the invention j are in the description below Explained with reference to the accompanying drawings.

Fig. Ι is a vertical center section through an expedient embodiment according to the invention.

Fig. 2 is a plan view, in which

Right half of the figure the lid is removed to reveal the inner parts close.

Fig. 3 is a single part in cross-section and on a larger scale.

The apparatus is made up of several annular compartments 1. Down at every department a heating surface 2 is arranged, which is expediently made of thin sheet metal of high There is thermal conductivity and is slightly inclined or curved to the outside To let liquid flow towards the outer edge. The surfaces 2 are with steam heated, which is passed through channels 3 below the heating surface. These channels, expedient three for each face, are annular and concentric as shown in the drawing. The J The channel into which the steam is initially drawn has the largest cross-section,! while the cross-sections of the other channels j gradually decrease according to the conj Densation of the steam, so that the steam speed in all channels is practical will be the same. To supply the steam in i the various channels 3 are a steam j chamber 4 and lines S provided. !

The apparatus has a central rotating shaft 6 which is driven by some force source is set in slow rotation by means of the gearbox 7 (approximately one rotation in 2 to 10 minutes). On top of the shaft, a container 8 is attached to which the possibly already highly concentrated liquid is supplied. From this container the liquid is fed through precisely set overflows 9 to the individual distribution pipes 10 supplied. According to the embodiment shown, such a tube is routed to each heating surface. With the A scraper device is connected to each surface at the mouth end of the distribution tubes, which is constructed according to the drawing in the following way: From the one on the shaft Attached hub 12 extends an arm 14 to which the distributor pipe 10 is attached by means of suitable fastening devices is. At the outer end of the arm 14 is a pin 15, which is one end of a curved flat spring 16 carries. The other end of this spring is supported by means of a Screw 17 against an arm 13, whose inner end rests against the hub 12 and at its outer end above the heating surface an inclined scraper 11 made of steel or the like (see Fig. 3) is attached. The scraper 11 is pressed resiliently by the spring 16 against that heating surface. The pressure can can be regulated by means of the screw 17.

When the wave rotates, a thin (about 2 mm high) layer of liquid is over the Poured heating surface behind the scrapers and the liquid continues to evaporate to dryness. The dry precipitate is scraped away by means of the scrapers, whose The inclination can be adjusted so that the powder scraped away inwards towards the inner Edge of the heating surfaces is pushed and through the inner free space into a container 18 falls, from which it can be removed through a door 19.

Of course, those shown and described Details can be changed within wide limits without being affected by the Essence of the invention is deviated.

Claims (3)

Patent Claims: i. Apparatus for evaporating liquids to dryness with several superimposed heating surfaces and a central rotating shaft, thereby characterized in that a container for receiving the liquid is arranged at the top of the shaft, from which for Each heating surface has special tubes through which the liquid reaches the Heating surfaces is distributed, over each of which a scraping device in a known manner is moved by the shaft. 2. Apparatus according to claim 1, characterized in that each manifold is connected to the associated scraper in such a way that both are together at the rotation and the mouth of the distributor pipe is behind the scraper (in relation to the direction of rotation). 3. Apparatus according to claim 1 or 2, characterized characterized in that each scraping device consists of an arm (14) which starting from a hub on the shaft, connected to the associated manifold is and a spring (16) carries, the end of which is by means of a screw (17) on a Arm (13) is supported, which is equipped at the edge with a scraper, which the latter thereby is pressed resiliently against the heating surface. 1 sheet of drawings.