NL2027797B1 - A device and method for the discharge of gases - Google Patents

Abstract

The invention relates to a device for discharging gases such as for instance manure gases, which apparatus comprises a gas source such as for instance a manure gas source such as a manure cellar, which gas source is connected to an inflow opening of a transport pipe for discharging gases and which transport pipe also comprises an outflow opening. wherein the device also comprises an air pump configured for transporting the gases from the gas source through the transport line to the outflow opening, which outflow opening opens underground. The invention also relates to a method for discharging gases such as for instance manure gases, wherein gases are transported from a gas source by means of an air pump via a transport line to an outflow opening of the transport line and wherein the outflow opening opens underground.

Description

A device and method for discharging gases The invention relates to a device for discharging gases. The invention also relates to a method for discharging gases.

In locations where livestock is kept or where manure is stored, so-called manure gases are produced as a result of biochemical processes that take place in the biologically active manure due to the manure coming from the cattle. A large part of the gases can pose a danger to humans and animals. For example, dairy cattle manure or slurry produces hydrogen sulphide/hydrogen sulphide (H.S) and sometimes also cyanide/hydrocyanic acid (HCN), both of which can also occur in very dangerous concentrations, especially with stored manure such as slurry or slurry. Furthermore, ammonia (NH), methane (CH) and carbon dioxide (CO:) are also released. The latter two are also important greenhouse gases and also occur with by far the highest concentrations.

To prevent a danger to humans and animals, stables or manure pits where the manure gases can arise are ventilated. Because methane, ammonia and hydrocyanic acid gas are lighter than air, they escape relatively easily. Carbon dioxide and hydrogen sulfide are heavier than air and therefore 'hang' in lower zones. The release of methane and carbon dioxide into the atmosphere has very undesirable climate influences and must therefore be prevented. To this end, existing manure systems often try to limit the release of gases, for example by providing better sealing of manure cellars. However, because new manure is produced every day, which also has to be transported to the manure cellars, a complete sealing is not feasible. As a result, the manure gases continue to be released into the barn and thus into the atmosphere. Closing off the slurry pit is also not a suitable solution, because the increased concentrations also create other hazards, such as the risk of explosion.

It is now an object of the invention to provide a device for discharging gases with which the above-mentioned drawback can be reduced or even prevented.

This object is achieved according to the invention with a device for discharging gases, which device comprises a gas source such as for instance a manure gas source such as a manure cellar, which gas source is connected to an inflow opening of a transport pipe for discharging gases and which transport pipe also has an outflow opening. wherein the device also comprises an air pump configured for transporting the gases from the gas source through the transport line to the outflow opening, which outflow opening opens underground.

By connecting the gas source to the inflow opening of a transport pipe, the gases formed or present in the gas source can be discharged through the transport pipe. In a manure cellar, the inflow opening can herein for instance be arranged at some height above the manure level. An air pump ensures the displacement of the gases through the transport pipe to the outflow opening. By opening the outflow opening underground, the gases are released into the ground. This enriches the soil with the gases and possibly the oxygen-rich air pumped along with the badgers. This extra supply of gases and air can enrich the soil. By using the device for discharging manure gases released from manure, these are not released into the atmosphere or, for instance, the stable.

Another advantage of the device according to the invention is that the device can also be specifically designed for a gas source with, for example, carbon dioxide or oxygen-rich air. The gas source may also be ambient air, for example. With the device, infiltration of carbon dioxide and/or oxygen into the soil can then be obtained. By infiltrating such gases into the soil, soil life can be positively stimulated.

Another embodiment of a device according to the invention is a device in which the outflow opening opens out below the ground level of a field, preferably at a depth of at most 140 cm below ground level, preferably at a depth of 60-140 cm.

By opening the outflow opening under a field, such as a grass or agricultural field, the gases infiltrated into the ground, such as gases such as fertilizer gases and the oxygen contained in the possibly pumped air, can pass through the soil life and the crops on the soil. fields are included. By arranging the outlet at a depth of up to 140cm below ground level, the gases can diffuse into the soil and effectively reach the root system of the crops. Preferably, the outlet is provided at a depth of 60cm to 140cm below ground level. As a result, any field operations do not interfere with the transport pipes installed in the ground.

In another embodiment of a device according to the invention, the outflow opening is formed by a plurality of perforations of the transport line.

By forming the outflow opening by means of perforations of the transport line, the gases can exit from the transport line via the perforations. The perforations are then preferably spread evenly over the desired outflow zone, or spread out for a proportional outflow in the outflow zone on the basis of, for example, pressure drop. When the transport line opens under a field, the desired outflow zone is, for example, spread over the part of the transport line that is located under the field.

In a preferred embodiment of a device according to the invention, the transport pipe also comprises an underground drainage pipe, wherein the outflow opening of the transport pipe is also formed by the perforations of the drainage pipe.

Drainage pipes have been installed under many fields or other agricultural land. These can be in active use as well as remnants of an outdated drainage system. By making the underground drainage pipe part of the transport pipe by coupling the pipes, they can be reused effectively or used for obtaining the soil infiltration of the gases.

Preferably, the drainage pipe also serves as drainage for water. As part of the transport pipe, the drainage pipe can then fulfill a double function, whereby the fertilizer gas transport and the drainage are combined. The outflow of the drainage pipe for the drained water is preferably provided with a water seal such as a gooseneck or water column, so that sufficient pressure can be applied in the transport pipe for the desired soil infiltration and to prevent an outflow of gases from occurring through the drain from the drainage pipe.

Also an embodiment of a device according to the invention is a device which also comprises an aspirator having an inlet, an outlet and a negative pressure inlet, the air pump displacing clean air and connected to the inlet of the aspirator, the outlet being connected to the inflow opening of the transport pipe and wherein the underpressure inlet is connected to the gas source.

Because the gases can be corrosive due to the components and because extra aeration of the soil around the outflow opening can be desired, it is advantageous to have the air pump displace clean air by for instance placing it outside the gas source. By passing the clean air from the air outlet of the air pump through the inlet of the aspirator, the gases can be drawn in through the negative pressure inlet. The mixture of clean air and gases can then be transported from the outlet of the aspirator via the transport line to the outflow opening.

It is also an object of the invention to provide a method for discharging gases such as for instance fertilizer gases, wherein gases from a gas source are conveyed by means of an air pump via a transport line to an outflow opening of the transport line and wherein the outflow opening opens underground.

By carrying the gases away from the gas source with an air pump and allowing them to flow out underground via an outflow opening of a transport pipe, the undesired emission of gases from a gas source can be reduced or even prevented.

Another embodiment of the method according to the invention is a method in which the outflow opening opens below the ground level of a field, preferably opens out at a depth of at most 140 cm below ground level, preferably at a depth of 60-140 cm. The advantages of this method have already been described in an embodiment of the device according to the invention.

In a preferred embodiment of the method according to the invention, the transport line also comprises an underground drainage pipe. Existing drainage pipes can thus be used advantageously for the soil infiltration of the gases.

Preferably, a device according to the invention is used for the method.

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

Figure 1 shows a schematic overview of a first embodiment of a device according to the invention.

Figure 2 shows a schematic overview of a second embodiment of a device according to the invention.

Figure 3 shows a plan of a third embodiment of a device according to the invention.

Figure 4 shows a schematic cross-sectional view of the embodiment of Figure 3.

Figure 1 shows a schematic overview of a first embodiment of a device 1 for discharging slurry gases 2. The slurry gases 2 are produced in a slurry gas source 3 by the slurry 4 present in the slurry gas source 3. A transport line 5 is arranged on the slurry gas source 3 . The fertilizer gas source is connected to the inflow opening 6 of the transport line 5. An air pump 7 moves the fertilizer gases 2 in the direction of the arrow 8 through the transport line 5, which discharges underground under a field 9 . The outflow opening of the transport line 5 is formed by perforations 10. The transport line 5 is arranged at a depth d below the ground level 11 of the field 9, so that the crop 12 on the field 9 can absorb the fertilizer gases infiltrated into the ground 13.

Apart from the other characteristics, the depth d preferably corresponds to the depth at which drainage pipes are installed for a particular soil or crop type.

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Figure 2 shows a schematic overview of a second embodiment of a device 21 for discharging fertilizer gases 2. The reference numerals of features corresponding to the first Embodiment are equal to the reference numerals of figure 1. The air pump 7 is connected to the inlet 28 of the aspirator 29 or also called ejector. The underpressure inlet 30 is connected to the fertilizer gas source 3. The outlet 31 of the aspirator 29 is connected to the inflow opening 6 of the transport line 5. Because the air pump 27 does not come into contact with the fertilizer gases that are carried through the transport line 5, it does not have to be. suitable for the movement of combustible gases. Extra air, such as ambient air, is also blown in via the inlet 28, whereby the soil 13 under the field 9 is also aerated.

Figures 3 and 4 show a third embodiment of a device 41 according to the invention. In the plan of figure 3, the drainage pipes 50 arranged under the field 49 are shown, which are connected to a collecting drain 51 which opens into a ditch 54 located next to the field 49. The transport line 45 is connected on the one hand to the fertilizer gas source 43 and connects below the field 49 with the drainage pipes 50.

Figure 4 shows a schematic cross-sectional view through line IV-IV of the embodiment shown in Figure 3 . The drainage pipes 50 are arranged below ground level 48 of the field 49 . The openings in the drainage pipes 50 form the outflow opening of the transport line 45. The openings in the drainage pipes 50 open out under the ground 53 of the field 49 on which, for example, a crop 52 has been arranged. Due to the height of the outflow 54 of the collecting drain 51, a water column can form in the outflow 54 for obtaining sufficient back pressure in the transport line 45 and drainage pipes 50. A good infiltration in the soil 53 can hereby be obtained.

Claims (10)

Conclusions 1. A device for discharging gases such as for instance manure gases, which apparatus comprises a gas source such as for instance a manure gas source such as a manure cellar, which gas source is connected to an inflow opening of a transport line for discharging gases and which transport line also comprises an outflow opening, wherein the device also comprises an air pump configured for transporting the gases from the gas source through the transport line to the outflow opening, which outflow opening opens underground. 2. Device according to claim 1, wherein the outflow opening opens below ground level of a field, preferably opens out at a depth of at most 140cm below ground level, preferably at a depth of 60-140cm. Device as claimed in claim 1 or 2, wherein the outflow opening is formed by a plurality of perforations of the transport line. Device as claimed in any of the foregoing claims, wherein the transport pipe also comprises an underground drainage pipe, wherein the outflow opening of the transport pipe is also formed by the perforations of the drainage pipe. Device according to claim 4, wherein the drainage pipe also serves as drainage for water. A device according to any preceding claim, further comprising an aspirator having an inlet, an outlet and a vacuum inlet, wherein the air pump displaces clean air and is connected to the inlet of the aspirator, the outlet is connected to the inlet opening of the aspirator. the transfer line and wherein the underpressure inlet is connected to the gas source. 7. A method for discharging gases such as for instance manure gases, wherein gases are transported from a gas source by means of an air pump via a transport line to an outflow opening of the transport line and wherein the outflow opening opens underground. 8. Method according to claim 7, wherein the outflow opening opens below ground level of a field, preferably opens out at a depth of at most 140cm below ground level, preferably at a depth of 60-140cm. Method according to claim 7 or 8, wherein the transport line also comprises an underground drainage pipe. A method according to claim 7 with a device according to any one of claims 1 to 6.