SU1576131A1 - Method and apparatus for dewatering forage grasses - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to agriculture, in particular to the production of feed. The purpose of the invention is to increase the productivity and degree of dehydration. The method involves treating the grass with an electric current in two stages while simultaneously removing the moisture that is released. At the first stage, the material is exposed to an electric field with a strength of 2.5 .10 4 ... 3.5 .10 4 V / m for 2 ... 3 s, which ensures the most rapid current density output at level 19 ... 31 A / m 2. At this level of current density, the material is processed at the second stage, which lasts 60 ... 80 s. A device for dewatering grass grasses includes two parallel-mounted gratings 2 and 3, between which a grass bale is placed. The latter is moved by the hydraulic cylinder 7 to the perforated hollow needles 8 connected to the source 9 of three-phase current. The needles 8 are arranged in a checkerboard pattern with periodic alternation of phases. This ensures the uniformity of the electric field. The needles 8 are inserted into a bale of grass and treated with electric current. Moisture is removed through needles 8. 4 sludge.

Description

The invention relates to agriculture, in particular to the production of fodder,

The purpose of the invention is to increase the productivity and degree of dehydration.

FIG. Figure 1 shows the dependence of the humidity of the material being processed on the processing time at various values of the density of the current passing through the material; on fit1. 2 - dependence of the intensity of the increase in the platitude of the current at different values of the electric field strength; in fig. 3 is a device for carrying out the method of FIG. 3 „

The method is carried out as follows.

The mowed grass is crushed and exposed to an electric field of strength 2P 5 1 0, „3.5 104 V / m for 200.3 s. Then the intensity of the electric field is reduced and the treatment of grass with electric current is continued for 60.0.80 s, maintaining the density of the current passing through the material being processed within 19 ".31. Along with the treatment with electric current, the released moisture is removed from the grass.

A current density of less than 19 A / m does not sufficiently affect the intensity of moisture release in the material being processed. The current density above 31 A / me does not have a significant effect. Reducing the moisture content of the finished Products, as there is a rapid drying of the near-electrode Grass layers, which leads to a sharp drop in current through the material, while the bulk of the material remains wet. i

The intensity of the electric field 2,,., 3.5 Ю4 V / m provides the most rapid output of current density to the level of 31 A / ma. A further increase in voltage practically does not affect the rate of increase in conductivity.

The device includes a chamber 1, in which two parallel-mounted grids 2 and ZE are interconnected by rods 4 and springs 5, Lattices 2 and 3 are mounted for movement along an axis, perpendicular to the planes of the gratings

2 and 3 and along the gattans 4. The lattice 3 is connected to the stem 6 of the hydraulic cylinder 7. Perpendicular to the plane of the gratings 2

and 3 opposite their holes, electrodes are installed, made in the form of perforated hollow needles 8. The latter are connected to a source of three-phase current 9 and arranged in a staggered order with periodic alternation of the phases connected to them.

The device works as follows.

The bale-pressed grass is placed between grids 2 and 3. Hydrocydyl 7 grids with grass are moved towards the needles 8, which, passing through the holes of the grids, are inserted into the material being processed. At the same time, power supplies are connected to the needles 8. Under the action of electric current, moisture is released, which is discharged through the hollow perforated ishts 8. The moisture content of the material after treatment is 45 .. .. 55%.

After finishing the treatment, the working chamber together with the processed material is retracted to the initial position. A bale of treated grass has a hole from the electrodes, which can serve as air ducts for drying before active ventilation "

35

formula of invention

1, A method of dehydrating forage grasses, including treating the grass with an alternating electric current and then removing the released moisture, characterized in that, in order to increase the productivity and degree of dehydration, the electric current treatment is carried out in two stages, in the first of which the grass is exposed

electric field with a intensity of 2.5-104 - 3.5-K) 4 V / m for 2 - 3s, and the second stage is carried out for 60 - 80 s, maintaining the current passing through the material being processed 19 - 31 A / m, and the removal of the moisture released from the grass is carried out simultaneously with the current treatment.

2.Dehydration device

five

grass, comprising a chamber with electrodes connected to a three-phase current source, characterized in that it is provided

50 60 70 SO 90 t, C Fie

5 A / m

1QA / M 16 A / m

WA / M .MA / m

35A / m 31 A / m

L, A / M

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Editor V. Petrash

Compiled by A, Skibnevsky

Tehred L.Oleynik Proofreader S. Shevkun

Order 1808

Circulation 524

VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5

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FIG. H

Subscription

Claims (3)

Claim 1, A method for dehydrating fodder grasses, comprising treating the grass with alternating electric current and then removing the released moisture, characterized in that, in order to increase the productivity and degree of dehydration, the electric current is treated in two stages, in the first of which the grass is exposed to an electric field with a tension of 2.5 · 1Ο ⁴ - 3.5-10 ⁴ B / m for 2 - 3 s, and the second stage is carried out for 60 - 80 s, maintaining the density of the current passing through the processed material within 19-, 31 A / m * ² ·, and the moisture released from the grass is removed simultaneously with the current treatment. 2. A device for dehydration of forage grasses, including a chamber with electrodes connected to a three-phase current source, characterized in that it is equipped with perforated needles, the establishment of a rpendik parallel to the plane is decided against their holes, and located in the chamber and connected to one another by two gratings installed in parallel planes with the possibility of movement along an axis perpendicular to the planes of the gratings, and the electrodes are made in the form of 1576131 current 5 are laid in a checkerboard pattern with a periodic alternation of phases connected to them. FIG. Ts