RU18711U1 - TWO-HOLE PRESS EXTRUDER FOR WASTE OIL FROM OIL MATERIAL - Google Patents

Abstract

Abstract of the utility model description

"Double-screw extruder for oil extraction from oilseeds

The utility model is intended for pressing oil from oilseeds in the production of vegetable oil and can be used in the food industry.

Known double-worm press extruder for squeezing oil from oilseed material, consisting of a loading, tinning and grain chambers, in the cavity of which there are two shafts with parallel pairs of worms and grinding nozzles and dies.

To increase the productivity of a two-screw press extruder for squeezing oil from oilseeds in the loading chamber, the thickness of the worm ridge in relation to its height is made in the ratio 1: 2 - 1: 3.

Description

Double screw extruder for squeezing oil out

oilseed material

The utility model is intended for the extraction of oil from oilseeds in the production of vegetable oil and can be used in the food industry.

Known double-screw prss-extruder designed to obtain oil from oilseeds (see "Oil and fat industry L 998 g, No. 4, p. 14-15). The press extruder EK-75/1200 consists of a sectioned working chamber, divided into zones of oil extraction and grinding of material, which is equipped with heating elements, a loading device, a collector for oil and a drive. The main disadvantage of this press extruder is that it is designed to process sunflower seeds without separating husks, that is, whole seeds, so the oil content of the resulting cake reaches up to 18%, which leads to large losses of oil.

The closest known twin-screw extruder for squeezing vegetable oil is a press for squeezing vegetable oil (see patent No. 2057022 6 V 30 V 9/16 Bulletin No. 9, 1996). The latter consists of series connected loading, heating and grain sections, at the same time, a matrix is installed at the output of the last section, through which cake is discharged in the form of granules. In the inner cavity of the sections are two screw shafts with the same direction of rotation. Pa shafts are fixed alternately with worms and chopping nozzles. Each pair (left and right worms) have the same direction of turns, the same diameter and constant pitch of turns. To increase the pressure on the material in the direction of its movement, each eating pair of worms is made with a smaller step than the previous one. In this case, on all pairs of worms, the thickness of the ridges (turns) is made in such a way that it occupies the volume of the inter-turn space of another parallel worm and, therefore, the zone of tension between them has the smallest gap. In the process, this leads to additional grinding of the material in the mating zone of the worms.

The main disadvantage of this twin-screw extruder is that a pair of worms in the loading chamber, where the source material is fed, is made with a ratio of the crest thickness to its height of 2: 1 - 3: 1, which significantly limits the performance of this press, since the free volume between the turns of worms in the conjugate zone are minimal.

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The purpose of the utility model is to increase the productivity of a double-worm press extruder for oil extraction.

This goal is achieved by the fact that in a two-screw press extruder for pressing oil from oilseeds, consisting of a loading, heating and grain chambers, in the cavity of which there are two shafts with parallel pairs of worms and grinding nozzles paired with each other, and dies, in the loading chamber the crest thickness the worm in relation to its height is made in the ratio 1: 2 - 1: 3.

The combination of these features allows, due to a decrease in the thickness of the worm crest, i.e., with a ratio of 1: 2 - 1: 3 of its thickness to its height, the gap between them increases in the mating zone of the worms. This, accordingly, increases productivity, since when loading oil-bearing material into the free volume that has formed, I wait for more source material to be received by the worms than in the prototype. Thus, the set of essential features set forth in the formula of the utility model, allows to achieve the desired technical result.

In FIG. 1 is a cross-sectional top view of a twin-screw extruder for squeezing oil (drive not shown).

A double-screw extruder for squeezing oil from oilseed material consists of loading 1, heating 2 and 3, and grain 4 and 5 chambers. The last chamber 5 is equipped with a die 6, through the openings of which the cake is unloaded. In the cavity of the chambers 1-5, there are two shafts 7 on which pairs of parallel worms 8 are installed in the loading chamber 1, and pairs of parallel worms 10, 11, 12, 13, 14.15 in other chambers. The worms 8 are made in such a way that the thickness of its crest to its height is 1: 2 - 1: 3, therefore, the maximum possible distance is formed between the bushes. Bet worms 10-15 have the same direction of turns, the same diameter and constant pitch for each pair. Moreover, to increase the pressure on the material along its direction of movement, each pair of worms has a smaller step than the previous one. each pair of worms 10-15 turns of the left worm enters the inter-turn space of the right worm with a minimum gap, which leads to additional material grinding in this mating zone. Between pairs 10-15, grinding nozzles 16,17,18 and 19 are installed. The grain chambers 4 and 5 consist of their grain plates (not shown in FIG. 1) installed with a gap through which the squeezed oil flows. The heating chambers 2 and 3 are provided with heating elements 20 and 21 to maintain the required process temperature. The shafts 7 are driven in rotation from the drive (not shown in FIG. 1) in one direction.

A two-screw extruder operates to squeeze oil out of oilseed material as follows. The initial oil-bearing material, for example, in the form of a kernel fraction of sunflower seeds enters the loading chamber 1. Here, the entire free volume is filled between the inner wall of the chamber 1 and the worms 8, as well as in the inter-turn space between the pair of worms 8. Rotating shafts 7 cause the material to move into the heating chamber 2, where the grinding nozzles 16 grind the core fraction while heating it from the walls of the heating chamber 2, heated by the heater 20. Then the mint is transported and simultaneously o is subjected to grinding in the mating zone of the worms 10, again subjected to grinding by nozzles 17. Thus, the material prepared for pressing is nostun into the grain chamber 4, where it is compressed by pairs of worms 11 and 12, and the extracted oil flows through the gaps of the grain plates of the grain chamber 4. Next cake is transported to heating chamber 3. In this chamber and subsequent, the process of first grinding and heating, and then pressing the oil is similar to that described above. Through the openings of the die, 6 cake is squeezed out in the form of granules and discharged from a twin-screw extruder.

Thus, the proposed design of the parallel bunk of the worms 8 in the loading chamber 1 creates in the mating zone the presence of a free volume in which more material is supplied, and, consequently, the productivity of the double-worm press extruder is increased.

Claims (1)

Two-screw extruder for squeezing oil from oilseeds, consisting of a loading, heating and grain chambers, in the cavity of which there are two shafts with parallel pairs of worms and grinding nozzles paired with each other, and a die, characterized in that the thickness of the worm crest in the loading chamber in relation to its height is made in a ratio of 1: 2-1: 3.