Method and device for extruded material drying

FIELD: food industry.

SUBSTANCE: invention relates to food industry. The extruded material drying method involves stages whereat: gaseous medium with overheated vapour is provided for inside a shell, material is extruded inside the shell, the material is dried in the gaseous medium, the dried material is conveyed inside the shell. Extruded material drying device. The extruded material drying device contains a shell for retaining the gaseous medium with overheated vapour (the shell having an inlet and an outlet holes), a means for creating gaseous medium with overheated vapour inside the shell, an extruder connected to the inlet hole, a conveyor means for acceptance of material from the extruder and its conveyance through the outlet hole from inside the shell.

EFFECT: invention usage will allow to increase extruded material drying efficiency.

31 cl, 4 dwg

 

The invention relates to a method and device for drying the extruded material.

For the effective implementation of the extrusion process, the extruded materials often must include a significant water content, so that after exiting the extruder in many cases must first be dried prior to packaging or other use. Especially if the material is a food product, the drying process must be to the extent possible, are made so that you can eliminate any contact between the dried material and bacteria or other microorganisms. However, using conventional methods of drying, in which there is contact between the material and the dry air, it is difficult to provide General sterility.

Thus, the objective of the invention is to provide a method and device which can effectively dry the extruded material without causing contamination by unwanted microorganisms.

From the point of view of process technology this problem is solved by the method of drying the extruded material containing phases in which: provide a gaseous environment with superheated steam inside the shell, ekstragiruyut material inside the shell, dried material in a gaseous environment and move dried mater what al from the inside of the shell.

Particularly low levels of microorganisms or even total sterility can be achieved if the temperature of the material when it leaves the extruder and is fed into the shell, more than 100C., especially more than 110C, 120C, 130C or 140C.

It is possible to provide drying of the material to a water content of less than 50 mass %and 40 mass %and 30 mass %and 20 mass % and 10 mass %. AW (water activity) is defined as the ratio of the vapor pressure of the pressure on the material (p) to the vapor pressure over pure water (p0) at a given temperature: AW=p/p0.

You can ensure that the temperature of the gaseous environment of more than 100C, 120C, 140C, 160C, 180C or 220C.

The gaseous medium may be at normal pressure or at elevated or reduced pressure.

The gaseous medium is preferably provided in the form of a mixture of the first component, consisting of air (or another gas, such CO2nitrogen or another inert gas, and water vapor as a second component, and has a water vapor content of at least 50 mass %to 60 mass %, 70 mass %, 80 mass %, 90 mass %, 95 mass %, 98 mass % to 99 mass %. The gaseous medium may consist of pure water vapor.

In a suitable embodiment, is provided by removing from the gaseous environment of volatile substances that go from m the material in a gaseous environment, especially aromatic substances. After removing substances can be added to the material, either directly or in the form of a material carrier, for example in the form of a coating or filler, to which is added in advance of the extracted substances.

After moving from the inside of the shell material can be Packed. In this context it may be provided that substances extracted from the gaseous environment, proceed to the packing container in the packaging process.

From the point of view of the device object of the invention is solved with a device drying the extruded material containing shell for holding a gaseous environment with superheated steam, and the shell has an inlet and outlet, means for creating a gaseous environment with superheated steam within the shell, the extruder is connected to the inlet, means of travel for receiving material from the extruder and move the material through the outlet from the shell.

Preferably, the outlet was located below the inlet.

The outlet can be positioned on the free end of the discharge channel. The outlet channel can go from the shell down.

It may be provided that the shell is reported to the exhaust manifold, which has the hole in the cell below the shell and above the outlet opening, leading outside.

Instead, or in addition, the shell can be provided in the exhaust tube of the steam, which is carried out through the fan to the condenser.

The mover may have a perforated conveyor belt.

Stretch of the means for moving may be a tube, under elevated or reduced pressure, soamsawali with sheath, especially its lower part.

Between the tube and the plot mover can be a means of direction or shut off the flow to ensure high flow around or through the tool moving through a gaseous medium.

The device is preferably equipped with extraction block for extracting volatile substances from a gaseous environment.

There is also an option of having a packing station associated with a device for packaging the dried material.

Convenient to the tool movement came to a packing station.

Other advantages and features of the invention will become apparent from the following description of the preferred options of execution with reference to the drawings, in which:

Figure 1 contains a schematic side view of the device in accordance with the invention, which can be implemented by the method according to the invention,

Figure 2 provides a side view of a variant of the device with the according figure 1;

Figure 3 contains a variant of the device according to figure 1, and

Figure 4 shows the densities of steam and dry and moist air at different temperatures and the values of relative humidity (rh).

The device consists primarily of the shell 2 with the bottom wall 4, the right wall 6A, the left wall 6b, the rear wall 8 corresponding to the front wall (not shown) and the upper wall 10. The bottom wall 4 is located essentially horizontally and is in the shown embodiment, the two parts 4A, 4b of the bottom wall located at a slight angle to each other. The purpose of this arrangement is that the condensate can drain off to the junction or transition between the two parts 4A, 4b of the lower wall, which forms the lowest point of the internal space of the shell.

The front wall (not shown) essentially parallel to the rear wall 8 and abuts against the lateral edge of the upper wall, side walls and bottom wall thereby to provide insulation so that in addition to the holes, which will be discussed below, the shell 2 has surrounded the interior space closed on all sides.

The extruder 20, which is preferably evaporated by the extruder, in which the prevailing temperature at least 100C, has an outlet leading to the transport channel 22, which is connected with centrales the second separator 24. The outlet 26 of the centrifugal separator is connected with the inlet hole to the cellular wheel floodgate 28, the outlet of which is directed through the top wall 10 of the shell 2 and ends above the tool 30 is moved.

Immersed tube 32 of the centrifugal separator 24 is connected to the suction tube 34, which is connected with the pipe 36. Inside the tube there is a fan 38 and the heating means in the form of a heat exchanger 40. At a certain height above the bottom wall 4, below the top wall 10 of the tube 36 enters the hole 37 in the bottom wall 8 through which sussanna environment is returned to the inside of the shell.

To enhance the contact between the drying medium and superheated steam inside the upper section of the internal space of the shell may provide another pipe 36, as in the example shown in figure 2. On its way this pipe also has a fan 38 and, optionally, the tool 40 is heated. A pipe 36 leads, firstly, to the top wall of the shell 10 in the region above means 30 moves and, secondly, into the hole 37' on the rear wall 8. With this arrangement, it is possible to extract the hot superheated steam from the area above means 30 moves, so that the inflowing steam intensively proceeded around located on its material. In another embodiment it can be provided that the opening 37' is the level means 30 move and that the stream flows in the opposite direction, so that hot steam flowed through the opening 37' and viduals through the opening in the upper wall 10 on the top of the tool 30 move to ensure intensive contact with steam located on top of it product. As another option, you can include fans mounted on the vehicle 30 moving and intensely subjecting the dried product to the impact of superheated steam.

In the lower part of the casing, preferably in the area of the bottom of the shell point directly above the bottom wall 4 of the pipe 50 of the exhaust steam enters the discharge hole 52 in the rear wall 8 and comes to the condenser 54 where the condensate is directed into the container 56. In the pipeline 50-steaming has driven fan 58, which is controlled by the information about the temperature and / or humidity or water vapor content. With this purpose, the inside of the shell is at least one temperature sensor and at least one sensor water vapor content to determine the state of vapor (relative humidity and (or) the degree of saturation or water vapor content). It is preferable to have one temperature sensor and the humidity sensor or the water vapor content in the upper region of the shell near the upper wall 10 and in the lower region near the bottom wall 14 or about the discharge openings 52. In the presence of superheated steam can seminoprotein degree overheated or the temperature difference relative to the saturated state. Using improved retrieval relatively wet steam from the lower region of the shell while simultaneously applying heat gaseous environment inside the shell can be shifted in the direction of a higher content of superheated steam at a higher temperature.

In this example, the tool 30 move has the form of a belt conveyor with a perforated transport belt, which has a first horizontally, and then tilt down. Under the same discharge end 60 mover has an additional conveyor belt 62, which passes horizontally through the outlet 64 of the casing 2 to the outside.

In the field additional vehicle 62 may provide sealing station 70, where the dried material is packaged in individual containers, such as jars with screw-on lids, containers with screw-on lids, or vacuum platanaceae lids, or plastic bags.

Block 80 extraction for extraction of volatile substances, such as aromatic substances, preferably has the form of a rotating cone column or rotating flat columns. It is a vertical cylinder 81, in which the inert separating gas, such as steam under normal or reduced pressure, separates the steam flow of volatile components otidae component or sludge. From top to bottom there are alternating stationary conical sheet metal 83 attached to the inner wall of the cylinder, and a conical sheet metal 87 attached to the rotating shaft 85.

Extracted liquid component, in this case, the condensate formed inside the shell, is fed to the input 82 for a product on top of the column through line 84 steaming. Under the action of gravity, the liquid flows down on the top surface of the first fixed cone 83 and reaches the inner surface of the first rotating cone 87, where the fluid is distributed in a thin turbulent film under the action of the acting centrifugal forces on it, and then flows upwards and outwards and moves with the outer edge of the rotating cone to the next set lower the fixed cone until, until, having passed all the cones, it will not reach the outlet 86 at the base of the column, when it will remain only a small content of volatile substances.

Inert separating the gas, in this case steam, which is fed in counter-current, flows through the column from the bottom up and absorbs the volatile components. When the steam-enriched volatile substances, reaches the top of the column, it is condensed in the condenser 88, so that the volatile substances were available in concentrated form dissolved in water and could be made in this way is dried material and (or) to the packaging container.

The method according to the invention provides a first extrusion material subject to drying the inside of the shell, in the extruder 20, with a suitable temperature for this process is the temperature more than 100C taking into account the fact that the material is substantially or completely free from microorganisms, when he emerges from the extruder. After exiting the extruder the material is fed directly into the transport channel 22, thus there is no possibility of contamination, and immediately captured in the direction of flow 23 flow prevailing in the transport channel 22, and reaches the centrifugal separator 24. The mixture of gas/vapor, which is practically devoid of particles, flows in the pipe 36 through the suction tube 34, and separated material passes through the mesh wheels floodgate 28 and comes to tool 30 is moved.

To create the desired gaseous environment with superheated steam or environment of pure superheated steam within the shell 2, such as described in US 5711086, there is a means 40 of the heat inside the pipe 36, which may be an electric heating element, heat exchanger, condenser or the like. Thus gas environment conducted in a closed circuit through the transport channel 22, the centrifugal separator 24, the suction tube 34, pipe 36 and the casing 2 can be heated on the desired temperature. The material flowing into the shell 2 through the extruder causes the flow of water or steam into the shell, so that the water vapor content inside the shell increases. By proper control without feedback or with feedback regarding steam extracted through the pipe 50 exhaust steam and condensed in the condenser 54, it is possible to regulate the content of steam inside the shell 2. In the absence of steaming excess vapor is discharged out through the discharge outlet 64. The shell may be equipped with an outlet channel, vent pipe, as shown in figure 2.

To accelerate or enhance production of the desired gaseous environment can be applied supply line pair (not shown) for supplying superheated steam directly into the shell 2. Alternatively, it may be provided that the supply line steam or water, such as water spray device, included in the pipe 36 further means 40 heating, so that by heating the steam or water evaporation can apply the superheated steam in the region of the hole 37.

Due to the different density of steam at different temperatures and due to the influence of air that can be mixed, as shown in figure 3, the inside of the shell are formed of vertical layers, and superheated steam is collected at the top, more humid pairs and (or) aromastone mixture collected at the bottom. For this reason, after delivery dryable material means 30 move passes through the first section at the top of the shell near the upper wall 10, i.e. within the zone of superheated steam, after which the material is located below the outlet 64. A low position of the outlet openings 64 impedes direct access superheated steam from the inside of the shell so that it would be undesirable loss. Alternatively, the conveyor belt 30 can completely be moved horizontally, as shown in figure 2.

Figure 2 shows a case where the device according to figure 1, which are primarily saturated steam and, thus, the excess moisture can be withdrawn from the inside of the shell through the outlet through the discharge hole 52 or alternatively through a vent pipe 41. The vent pipe 41 is connected with the three-way valve 42, which is also connected through a connecting line 43 with the pipeline 50-steaming and through another connecting line 44 with a hole 45 in the bottom wall 4. The vent pipe has a vent hole 46 that outputs to the outside.

The three-way valve 42 may be placed in a first position, in which shall be communicated to the lines 43 and 44, while the pipe 41 is blocked, so that drainage occurs through the openings 45 and 52. If desired, Nalini 43 may be provided with a shutoff valve, to ensure that in the first position three-way valve drainage occurs exclusively through the hole 52.

The three-way valve 42 may be placed in a second position in which the vent pipe 44 communicates with the pipe 44 and the tube 43 is blocked and the fan 58 is turned off, so that the steam environment within the shell communicates with the environment through the opening 45 and the pipes 44 and 41.

In contrast to the device according to figure 1 the device is shown in figure 2, includes a guide channel 47, which is in the area of the outlet opening 64 extends shell down and ends at the open end. Scat 48 directs the material from the discharge end 60 means 30 move to another transport belt 62. Along with the ventilation pipe 41, which ends at a higher level, the guide channel allows the release of excess steam from the inside of the shell 2 through the vent pipe 41 in the second position three-way valve 42. Pairs inside the shell tends to flow down through the guide channel, but is faced with a relatively cold ambient air, so that the pilot channel at the level of the vent hole 46 is formed essentially horizontal boundary layer. The height h0 at which the vent hole 46 is located above the height from the rim end of the guide channels, may, for example, be 10%, 20%, 30% or 50% of the height H of the shell, and N denotes the vertical distance between the highest and lowest points inside the shell. In addition, the height h0 is preferably between about 30% and 70%, for example 50%, of the vertical length of the hb guide channel, starting from the bottom wall 4 or the lowest point of the shell.

In all variants of the implementation of the height hs of the discharge openings 52 above the bottom wall 4 of the shell or above the lowest point of the shell may be almost zero, or it may be approximately 5%, 10%, 15%, 20% or 30% N. The height ht, which in fact is mainly the drying process and at which or above which preferably is a horizontal partial layer on which the gaseous medium has a desired high temperature and shows a low oxygen content, may be about 50%, 60%, 70%, 80%, 90% or 95% of the height H of the shell, measured in each case from the bottom wall of the casing 4 or the lowest point of the shell.

Figure 3 shows a variant of the invention, in which in contrast to the embodiments shown in figures 1 and 2, the goal is not to have a clear horizontal sequence of layers, in which the steam environment, if you move from the bottom up, is becoming warmer, poor air the om and oxygen and more contains only superheated steam, but rather steam environment, which is mixed more thoroughly and made uniform across the membrane. This is achieved by the fact that the inner space of the shell uniformly mixed by means of at least one circulation fan 90 (figure 3 shows three), so that in the vertical direction cannot be set to almost any stratification or uneven mixing.

In addition, the contact between the dried material and steam environment can be improved with the system of forced circulation, consisting of a centrifugal separator 92, the fan 94, heat exchanger 96, fans 98A, b, C, and United with them paranapanema boxes 100A, b, C., depending on which is more appropriate centrifugal separator 92, the fan 94, the heat exchanger 96 and the fans 98 can be located inside or outside of the housing 2. Depending on the flow conditions can be dispensed with fan 94 or fan 98. The fan 94 sucks steam environment through the centrifugal separator 92 upstream, where the particles are generated by the material may be dried and precipitated. Centrifugal separator with his hand sucks steam environment at any suitable point or region within a shell. After the fan 94 steam medium flows through the heat exchanger 96, pre-enrichment of the military ferry (optional) through steam generator 95. In the heat exchanger 96 heat can optionally be supplied or discharged, after which steam environment comes in perenapravlyalsya box 100A, b, C through the fans 98A, b, C. Perenapravlyalsya boxes direct steam environment through preferably perforated belt conveyor means 30 moves, so that the material on it have been in close contact with a steam environment.

The reference list of items

2 Shell

4 the bottom wall

4A, b of the bottom wall

6A, b, Right wall, left wall

8 Rear panel

10 Upper wall

20 Extruder

22 Transport channel

23 flow Direction

24 Centrifugal separator

26 Outlet

28 Cellular wheel floodgate

30 travel Agent

32 Immersed tube

34 Suction tube

36, 36' Pipe

37, 37' Hole

38, 38' Fan

40,40' heat Exchanger

41 the ducting

42 Three-way valve

43, 44 of the connecting line

45 Hole

46 Vent

47 conduit

48 Scat

50 the exhaust tube pair

52 Discharge hole

54 the Condenser

56 Container

60 the Discharge end (30)

62 Another tape to move

64 Outlet

70 Packing station

80 extraction Block

81 Cylinder

82 Input for the product is

83 Fixed cone

84 the exhaust tube pair

85 Rotating shaft

86 Outlet

87 Rotating cone

88 Condenser

90 ventilation fan

92 Centrifugal separator

94 Fan

95 steam Generator

96 the heat Exchanger

98A, b, C Fan

100A, b, C Perenapravlyalsya box

1. The method of drying the extruded material containing phases, which are:
- provide a gaseous environment with superheated steam inside the shell (2),
- ekstragiruyut material inside the shell (2),
- dried material in a gaseous environment, and
- move the dried material from the inside of the shell (2).

2. The method according to claim 1, characterized in that the temperature of the material when entering the inside of the shell (2) is more than 100C, 110C, 120C, 130C. or 140C.

3. The method according to any one of claims 1 or 2, characterized in that the material is dried to a water content of less than 50 wt.%, 40 wt.%, 30 wt.%, 20 wt.% or 10 wt.%.

4. The method according to claim 1, characterized in that the material is dried to AW values less than 0.6; 0,5; 0,4; 0,3; 0,2 0,1 or.

5. The method according to claim 1, characterized in that the gaseous medium is at a temperature greater than 100C, 120C, 140C, 160C, 180C or 220C.

6. The method according to claim 1, characterized in that the gaseous medium is at normal pressure, at elevated or at reduced pressure.

7. The method according to claim 1, characterized who eat that the gaseous medium is a mixture of the first component, consisting of air and/or another gas, such as CO2nitrogen or other inert gas and water vapor as a second component and has a water vapor content of at least 50 wt.%, 60 wt.%, 70 wt.%, 80 wt.%, 90 wt.%, 95 wt.%, 98 wt.% or 99 wt.%.

8. The method according to claim 1, characterized in that the gaseous medium is extracted volatile substances, which leave the material in a gaseous environment.

9. The method according to claim 8, characterized in that after removing substances newly added to the material.

10. The method according to claim 9, characterized in that the substances are added to the material directly or in the form of a material carrier, such as a coating or filler.

11. The method according to claim 1, characterized in that after moving from the inside of the membrane (2) material Packed.

12. The method according to claim 11, characterized in that the substances extracted from the gaseous environment, served in the packaging container during the packaging process.

13. The method according to claim 1, characterized in that the gaseous environment inside the shell thoroughly mixed and no vertical stratification.

14. Device for drying the extruded material containing:
shell (2) for holding a gaseous environment with superheated steam, and the shell has inlet and vypuskaetsya (64),
means for creating a gaseous environment with superheated steam inside the shell,
- extruder (20)connected to the inlet hole,
- means (30) move to accept material from the extruder (20) and move the material through the outlet port (64) inside the shell (2).

15. The device according to 14, characterized in that the outlet port (64) is located below the inlet.

16. The device according to 14, wherein the exhaust hole is located on the free end of the discharge channel.

17. The device according to item 16, characterized in that the outlet channel is down from the shell (2).

18. Device according to any one of p-17, characterized in that the shell is reported by the ducting, which has an outlet opening at the height of the lower shell (2) and above the exhaust opening and leads to the outside.

19. The device according to 14, characterized in that the means (30) movement has a perforated conveyor belt.

20. The device according to 14, characterized in that stretch of the means (30) move the pipe is under increased or reduced pressure, soamsawali with sheath, especially its lower part.

21. The device according to claim 20, characterized in that between the pipe and the plot means (30) movement is a means of direction or shut off the flow to ensure the availability and the steady flow around or through the tool moving through a gaseous medium.

22. The device according to 14, characterized in that is provided by the unit (80) extraction for extracting volatile substances from a gaseous environment.

23. The device according to 14, characterized in that provided a packing station for packing the dried material.

24. The device according to item 22, wherein the means (30) for the movement comes to a packing station.

25. The device according to 14, characterized in that the extruder (20) leads to the transport channel (22), which is connected with a centrifugal separator (24).

26. The device according to p. 25, wherein the transport channel (22) is connected with the shell (2) in the upper wall (10).

27. Device according to any one of p or 26, characterized in that the outlet of the centrifugal separator ends over means (30) is moved.

28. The device according to PP and 26, characterized in that the submerged pipe (32) of the centrifugal separator (24) connected to suction means such as a fan or jet nozzle.

29. The device according to 14, characterized in that inside the shell (2) is the circulation pump (90).

30. The device according to 14, characterized in that inside the shell (2) is centrifugal separator (92), purifying gaseous environment, with fan (94).

31. The device according to item 30, wherein the centrifugal separator (92) is placed in series with among the STV (100A, b, C) flow direction or directions of the pair and, optionally, one or more fans (98A, b, C).



 

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2 tbl, 3 ex

FIELD: food-processing industry, in particular, biotechnological methods of producing liquid food product from non-shelled buckwheat seeds.

SUBSTANCE: method involves using whole clean buckwheat seeds; germinating said seeds by soaking in water at temperature of 20-25°C; holding for 4-5 hours; heating germs through at temperature of 50-55°C for 20 min; grinding germs into homogeneous mass; pouring water having temperature of 25°C and subjecting to extraction for 20-25 min; squeezing through filter and pasteurizing. Resultant mass may be used as independent product, or it may be utilized in beverage production or in industry for obtaining special feeding products for people with weak health.

EFFECT: provision for obtaining of product having high nutritive value and containing readily digestible protein and biologically active substances.

2 ex

FIELD: food-processing industry, in particular, production of powder from tubers of Jerusalem artichoke.

SUBSTANCE: method involves washing, sorting, inspecting, gauging, cleaning and additionally cleaning basic material; cutting prepared material, blanching and exposing to sulfitation; providing drying procedure followed by grinding. Drying procedure is provided in two short-time sequentially performed stages, which are provided in alternation multiple times: first stage involving subjecting cubic pieces of Jerusalem artichoke of predetermined size and supplied in dense layer to treatment with overheated steam of atmospheric pressure for predetermined time interval, and second stage involving treatment in fluidized bed for predetermined time at predetermined temperature.

EFFECT: improved quality of ready product and increased thermal efficiency of drying procedure.

3 dwg, 1 tbl

FIELD: food-processing industry.

SUBSTANCE: method involves adding chick-pea flour into dry nutritive mixture of groats base and wheat grits, with components being used in predetermined amounts.

EFFECT: provision for producing of dry nutritive mixture with increased biological value from readily available components, such as chick-pea flour.

FIELD: food-processing industry, in particular, preparing of extruded product, such as aerated hardtacks.

SUBSTANCE: method involves mixing hardtack wheat crumbs with hardtack rye-and-wheat crumbs and corn flour; extruding mixture having moisture content of 15-18% at temperature of 100-110°C under pressure of 11-12 atm; drying extrudate to moisture content of 4-5%; cooling to temperature of 20-30°C; applying vegetable oil and flavor additive onto resultant semi-finished product. Composition contains hardtack wheat and rye-and-wheat crumbs, corn flour, vegetable oil and flavor additive, said components being used in predetermined ratio.

EFFECT: soft taste and light aroma of aerated crunchy hardtacks.

3 cl, 1 ex

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