RU2299384C1 - Sapropel drying method - Google Patents

Abstract

FIELD: drying of wet sapropel mass after preliminary dehydration and reduction of moisture content by at least half the total moisture content.

SUBSTANCE: method involves applying wet sapropel mass onto rectangular grates; positioning grates in sealed chamber and blowing grates with heated air until sapropel is dried to needed moisture content; cleaning grates by means of brushes from dried sapropel and feeding the latter into receptacle device. Grates are united into cassettes. Grates are filled with wet sapropel mass by dipping grates of each cassette into tank with continuously or periodically replenished sapropel mass. Each of cassettes is, thereafter, into row in closely abutting relationship with respect to one another within channel, said grates being oriented along said channel, wherein heated air is fed.

EFFECT: reduced costs for sapropel drying process, when required capacity is not great.

Description

The invention relates to methods for drying wet sapropelic mass after preliminary dehydration while reducing moisture content to 50%.

A known method of drying sapropel, implemented in a complex including a pressurized sealed support casing blown with heated air with an infinitely closed flexible contour drive located inside it with rectangular lattices suspended on it, onto which wet sapropel mass is applied in the loading zone, and in the discharge zone after drying the sapropel to a predetermined humidity, the lattices are brushed off the dried sapropel with brushes and fed to the receiving device (Pat. RF application 2003114569/06, class F26B 15/24, 2004).

However, it is advisable to use the known method of drying sapropel with a sufficiently large initial feed rate, and with limited productivity, when implementing a project, for example, for a small enterprise, it may be economically disadvantageous due to the significant size of the industrial building and the metal consumption of the equipment.

The technical result of the invention is the ability to effectively use the method of drying sapropel with a relatively low productivity in the feed.

The technical result is achieved by the fact that in the method of drying sapropel, including applying wet sapropelic mass to rectangular lattices, placing the lattices in a sealed chamber and blowing them with heated air until the sapropel is dried to a predetermined humidity, cleaning the lattices with dried brushes and feeding it into the receiving device according to the invention, the gratings are combined into cassettes, and the gratings are filled with a wet sapropelic mass by immersing the gratings of each cassette in a tank with periodically sapropel of renewable weight, whereupon all the cassettes are placed in a row close to each other in the channel along with the orientation of the lattices of the channel, which is supplied with heated air. In the channel cassettes can be placed in one or more rows.

The method of drying sapropel is illustrated by drawings, in which Fig. 1 shows the operation of applying wet sapropel mass to the cassettes, in Figs. 2 and 3 - the operation of drying sapropel in a channel when placing cassettes in one or several rows (in two rows), in Fig. 4 - section AA in FIG. 2, FIG. 5 - operation of cleaning the grids of dried sapropel with its supply to the receiving device (hopper).

The method of drying sapropel is as follows. Cassettes 1 with gratings 2 are alternately immersed in a tank 3 with continuously or periodically replenished sapropelic mass 4. Cassettes with sapropelic mass deposited on their gratings 2 are placed in one row (Fig. 2) or in several rows (Fig. 3) close to each other in a sealed channel 5 or 6 with the orientation of the grids 2 along this channel. In this case, the sealing of the channel can be carried out either by special removable or hinged covers, or by blocking the channel 5 or 6 from above with the supporting plates of the cartridges themselves 1. After placing the cartridges in the channel 5 or 6 and covering it from above, heated air 7 is supplied, which, blowing the lattice 2 of all the cassettes 1 in the channel, provides drying of the sapropel deposited on the lattice 2 with a thin layer (tested experimentally). Cassettes 1 with dried sapropel after stopping the supply of heated air to channel 5 or 6 are transferred to a receiving device made, for example, in the form of a hopper 8, over which the grates 2 are mechanically cleaned from dried sapropel using multi-row metal brushes 9. When placing cassettes 1 in channel 6 in several rows, the performance of the complex can be significantly increased. The released cassettes 1 with gratings 2 are returned again to fill them with a wet sapropelic mass, after which the sapropel drying cycle is repeated.

Distinctive features of the invention provide the possibility of drying sapropel at a relatively low material cost, if the required performance in the source food is relatively small.

Claims (3)

1. The method of drying sapropel, including applying a wet sapropel mass to rectangular lattices, placing lattices in a sealed chamber and blowing them with heated air until the sapropel is dried to a predetermined humidity, cleaning the lattices with brushes from dried sapropel and feeding it to a receiving device, characterized in that the lattices are combined into cassettes, and the filling of the lattices with a wet sapropelic mass is performed by immersing the lattices of each cassette in a tank with constantly or periodically replenished sapropelic mass soya, after which all the cassettes are placed in a row close to each other in the channel with the orientation of the gratings along this channel, into which heated air is supplied. 2. The method according to claim 1, characterized in that the cassettes are placed in one row in the channel. 3. The method according to claim 1, characterized in that the cassettes are placed in several rows in the channel.

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