NL1022605C2 - Manure dryer. - Google Patents

Description

MANURE DRYER

The invention relates to a device for drying a mixture, such as slurry or industrial effluent.

From an environmental point of view, it is desirable to reduce such mixtures, such as manure or industrial effluent, to a dry mixture. This simplifies its processing and, in the case of manure, the fertilizers are also retained.

Various devices are known for drying such mixtures. For example, a device 10 is known in which a drying bed is present, through which air can be blown and on which the mixture, preferably a stackable mixture, is spread. The mixture can optionally be applied to a special carrier layer. This creates a layer of a few 15 centimeters on the drying bed, which must be dried by the air blown through it.

However, it appears that with such devices the drying process is slow and that a good flow with air is not always guaranteed.

It is an object of the invention to provide a device with which the drying process can be accelerated relative to existing devices and wherein the energy consumption is also kept low.

This object is achieved with a device according to the invention, which device comprises: a storage container for holding the mixture; an evaporating surface that is at least movable between a humidifying position, in which the surface 1022605 H is moistened by the mixture, and an evaporating position in which moisture from the applied mixture is evaporated; H - ventilation means for causing an air flow to dry the wetted surface.

Because the evaporating surface is moved between the humidifying position in, for example, a storage container and an evaporating position outside it, it is ensured that the surface of the evaporating surface is always moistened with a small amount of the mixture. This wetting can take place because the surface runs through the mixture or because, for example, the mixture is sprayed onto the surface. The ventilation means then ensure that an air flow flows along or through this evaporation surface, whereby the mixture present is dried. A subsequent amount of mixture can then be applied to the surface and dried. By repeating this, the total mixture is finally dried in the storage container.

In a preferred embodiment of the device according to the invention, it comprises at least one conveyor belt, which conveyor belt forms at least a part of the evaporation surface. The conveyor belt can preferably extend between two return rollers, a return roll of which is at least partially located in the mixture.

By driving the conveyor belt, the surface of the conveyor belt is thus always provided with a part of the mixture.

In another embodiment of the device according to the invention, the evaporation surface 30 is perforated. This makes it possible to also blow a part of the air stream or the entire air stream through the evaporation surface. This will further stimulate the evaporation of the moisture.

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In yet another embodiment of the device according to the invention, the longitudinal axis of the at least one conveyor belt extends substantially vertically with respect to the mixture surface. This also makes it possible to place a number of conveyor belts next to each other and thus to obtain a very large evaporation surface.

In yet another embodiment of the device according to the invention, it comprises discharge means for discharging dried mixture from the storage container. These discharge means can comprise a pump.

Furthermore, in a preferred embodiment of the device according to the invention, control means can be provided for periodically or continuously moistening the evaporation surface. In the case of conveyor belts, the control means can drive these conveyor belts, such that the conveyor belts run continuously or periodically. This control can take place in combination with measurements from sensors, for example sensors, which can measure the humidity of the mixture applied to the evaporation surfaces, the air humidity, the air temperature, the air flow rate and / or the weight of the applied mixture. On the basis of these measurements, for example, the humidification can take place more often or less frequently.

These and other features of the invention are further elucidated with reference to the accompanying drawings.

Figure 1 shows a front view of a device according to the invention.

Figure 2 shows the device according to Figure 1 in side view.

Figure 3 shows the device according to Figure 1 in top view.

Figure 4 shows a second embodiment of the invention.

The device 1 is schematically arranged in a space 2 in figure 1. The device 1 has a frame 3 with a storage container 4 on the H 5 bottom side.

On the upper side of the frame 3, shafts 5 are arranged with a number of return rollers 6 on top. Over these return rollers 6, a belt 7 is mounted, which hangs down into the storage container 4. The shaft 5 is driven by a motor I 8. a roll 9 is provided on the cloth 7, which ensures that the cloth hangs tightly and in the mixture in the storage bin 4.

In figure 2 the device 1 is shown in side view. It can clearly be seen herein that the different conveyor belts 7 are arranged vertically and all hang with a part in the storage container 4.

Figure 3 shows a top view of the device I according to the invention. The different shafts 5 are driven by means of a single motor 8 and are connected to each other by means of, for example, chain wheels. In order to ensure that it is arranged on conveyor belts 7

I mixture to dry can, for example, air L from the side

I are blown in between the conveyor belts, which air flows through the preferably preferred conveyor belts and I subsequently flows away. For example, the air from a stable can be used as dry air. This air has already been heated up, making it able to absorb more moisture.

Figure 4 shows a second embodiment of a device 10 according to the invention. The device 10 has a vertically arranged conveyor belt 11 with two turning wheels I 12. On the underside of the conveyor belt 11, nozzles 13 are arranged on either side, which mixture is a mixture of I 1 02260; ηιΓ · :: ΐ · -> CT - W »···. · ^! · -Ί ^ '-' '- w- ^ WPTg- ^ II III W Ι · Ι ^^ -? ΜΚΕΒΤΜΙΤ.Μ -' - 5 coming from a storage tank 14 onto the conveyor belt 11. The mixture on the conveyor belt 11 is then dried by an air stream.

A drip tray 15 is furthermore provided on the underside of the conveyor belt 11, which catches excess sprayed-on mixture.

Furthermore, a scraper (not shown) may be provided to scrape dried mixture from the conveyor belt 11.

In addition to a conveyor belt, it is of course also possible to use, for example, a flat plate or rotating drum as evaporating surface, which may or may not be perforated.

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Claims (8)

A device for drying a mixture, such as manure or industrial effluent, which device comprises: I - a storage container for holding the mixture; - an evaporating surface which is at least movable between a humidifying position, in which the surface I is moistened by the mixture, and an evaporating position I, in which moisture from the applied mixture is evaporated; Ventilation means for causing an air flow in order to dry the wetted surface. I 10 2. Device as claimed in claim 1, comprising at least one conveyor belt, which conveyor belt forms at least a part of the evaporating surface. Device according to claim 1 or 2, wherein the evaporation surface is perforated. I 15 Device as claimed in claim 2 or 3, wherein the longitudinal axis of the at least one conveyor belt extends substantially vertically with respect to the mixture surface. 5. Device as claimed in any of the foregoing claims, comprising scraping means for scraping dried mixture from the evaporation surface. Device as claimed in any of the foregoing claims, comprising discharge means for discharging dried mixture from the storage container. 7. Device as claimed in claim 6, wherein the discharge means comprise a pump or conveyor belt. Device as claimed in any of the foregoing claims, comprising control means for periodically or continuously moistening the evaporation surface. I 1 022 60 5