DE102013018731A1 - Pump device and method of operation - Google Patents

Abstract

Biogas plant with a pump device, pump device and method for operating a pump device with at least one rotary pump device, in particular for a biogas plant, for conveying a working fluid, which comprises a liquid content and a solids content. The rotary pump device has a suction side and a pressure side and comprises a housing device. The housing means has an inlet for the working fluid (3) on the suction side and an outlet for the working fluid (3) on the pressure side. Furthermore, a delivery region is provided between the inlet and the outlet, wherein in the delivery region a rotation device with a blade device is arranged, which conveys the working fluid from the inlet through the delivery region to the outlet. The outlet for the working fluid is guided substantially laterally outwards on the pressure side of the rotary pump device, and the rotary device is designed and suitable for conveying the working fluid on the pressure side of the rotary pump device laterally outwards into the outlet. In this case, the pressure side of the rotary pump device in the axial direction, a separation device is arranged and the rotation device has in the axially outer region on the pressure side an opening for the separation of working fluid with a substantial proportion of gas in the separator.

Description

The present invention relates to a pump device, which is particularly suitable for use on or in a biogas plant. In this case, the pump device comprises at least one rotary pump device with which a working fluid can be conveyed. The present invention further relates to a method for operating such a pump device and a biogas plant with such a pump device.

In biogas plants, one or more pumps or even complex pumping systems are used to pump a working fluid, for example, from a storage tank into a fermenter tank, or to pump the working fluid from one fermentor tank to another.

The working fluid in a biogas plant usually comprises a liquid content and a solids content, wherein the working fluid has different flow properties depending on the amount of solids. The flow properties of the working fluid also depend substantially on the solution of the solids content in the working fluid.

In addition, the working fluid in a biogas plant may under certain circumstances also be loaded with gas to a negligible extent. The gas is contained in the form of small gas bubbles in the working fluid. Such a gas-containing working fluid is generally not critical for the normal operation of a biogas plant, especially since gas is a desired product when operating a biogas plant.

However, when pumping or pumping over the working fluid, the gas contained in the working fluid may present difficulties under certain circumstances. When the working fluid is drawn in, in particular into a rotary pump, the rotation of the impeller in the delivery region causes a local pressure drop, as a result of which the small gas bubbles in the working fluid relax and thereby expand considerably spontaneously.

This can lead to larger accumulations of gas in the delivery area of the pump, whereby the delivery rate of the pump can be considerably reduced. In the worst case, further operation of the pump due to gas accumulation may even be impossible.

Gas has only 1/1000 of the density of a liquid and by the pressure decrease in the inlet of the pump expand so that the delivery area may possibly be completely added by the expanding gas.

Thus, the capacity of the pump can be severely limited by the expanding gas in the pump when sucking.

It is therefore the object of the present invention to provide a biogas plant with a pump device, a pump device and a method for operating a pump device, wherein a satisfactory flow rate is made possible even with a gas-laden working fluid.

This object is achieved by a pump device with the features of claim 1. The inventive method is the subject of claim 25. The biogas plant according to the invention is the subject of claim 28. Preferred developments and refinements of the invention are the subject of the dependent claims. Further advantages and features of the invention will become apparent from the embodiments.

The pump device according to the invention with at least one rotary pump device is particularly suitable for use in or on a biogas plant and serves to convey a working fluid which comprises at least one liquid fraction and at least one solid fraction. The rotary pump device has at least one suction side and at least one pressure side and also comprises at least one housing device. At least one inlet for the working fluid on the suction side and at least one outlet for the working fluid on the pressure side of the rotary pump device are provided on the housing device, wherein at least one delivery region is provided between the inlet and the outlet. At least one rotating device is arranged in the conveying region with at least one blade device, which conveys the working fluid from the inlet through the conveying region to the outlet. The outlet for the working fluid at the pressure side of the rotary pump device is guided substantially laterally outwards and the rotation device is suitable and designed to convey the working fluid on the pressure side of the rotary pump device laterally outward into the outlet. At least one separating device is arranged in the axial direction on the pressure side of the rotary pump device. In addition, at least one opening for separating working fluid into the separation device is provided on the rotation device in the axially outer region on the pressure side of the rotary pump device. In this case, the working fluid to be separated in particular has a significant proportion of gas.

As working fluid within the meaning of the invention, in particular any fluid is understood, which in the context of the operation of a biogas plant is encouraged. This preferably also includes a biomass mixture or a substrate mixture which is fermented in the biogas plant.

According to the invention, the separating device in particular seals the delivery region on the pressure side of the rotary pump device in the axial direction. The outlet of the rotary pump device, which is guided laterally outward, can in particular also be led away to the outside axially and / or tangentially.

The pump device according to the invention with at least one rotary pump device offers many advantages. A significant advantage is that a rotary pump is made available by the separation device on the pressure side of the rotary pump device in conjunction with the specially designed rotation device, in which a drop in the capacity of the rotary pump can be effectively avoided by accumulating in the delivery area gas.

Particularly in the case of working fluids which are conveyed through a biogas plant, the special composition of the working fluid can lead to a not inconsiderable gas loading of the fluid. The higher the pressure on the working fluid, the smaller are those gas bubbles. That is, many small gas bubbles may be contained in the working fluid.

This gas loading is normally not critical for the operation of a biogas plant. However, depending on the flow characteristics of the working medium to be pumped, a pressure drop may occur during the conveyance of the working fluid through the conveying region of the rotary pump device from the suction side to the pressure side, which under certain circumstances may cause the many small gas bubbles to suddenly relax or increase in size. Since gas has only about 1/1000 of the density of a liquid, no pressure can be built up in the rotary pump. The gas accumulation then blocks access to the delivery area and can not be removed by the rotary pump device. Depending on the accumulation of gas, this can also lead to the fact that the conveyance of liquids through the rotary pump is no longer or only to a limited extent possible and the delivery process comes to a standstill.

Due to the special design of the rotation device with the opening in connection with the separation device on the pressure side of the rotary pump device, the gas accumulating in the delivery region can escape in the axial direction to the pressure side. This is done u. a. even by the centrifugal force provided by the rotator. In addition, the removal of the gas from the delivery area can also be actively supported in other embodiments.

Preferably, the rotation device is designed as a semi-open or closed radial flow impeller. In this case, for example, a semi-open radial flow impeller on a so-called plate floor on which the blade device is received. The vane devices are designed in particular as pressure vanes. Such a closed Radialstromlaufrad can z. B. be designed as a channel wheel pump with a plate bottom and plate cover.

Particularly preferably, the opening in a pressure side facing plate means of the radial flow impeller is arranged. In the case of a semi-open radial flow impeller, accordingly, the single plate device faces the pressure side of the rotation device. On the underside of the plate device, the pressure vanes are then attached, which extend in the direction of the suction side in the conveying region.

In advantageous developments, the invention or the inventions are arranged in the radially inner half of the plate device. In particular, an arrangement of the opening or the openings is preferred, which is located as far as possible in the center of the plate device or the rotating device.

In preferred developments, the conveying direction through the conveying region is directed essentially from axially to radially. In this case, radial and in particular also a lateral or tangential orientation is to be understood. In other embodiments, in particular when the rotation device is designed as a closed radial flow impeller, the conveying direction z. B. also extend from tangential to tangential.

In particularly preferred embodiments, the rotary pump device is arranged such that in the installed state of the rotary pump device, the conveyor region extends substantially from bottom to top. In all embodiments, the operation of the pump device is independent of the installation position of the rotary pump device.

In advantageous developments, the rotation device has at least one impeller back vane. Such an impeller back bucket offers many advantages. On the one hand, the impeller back bucket builds up a counterpressure to the centrifugal force, which is generated by the pressure vanes of the blade device. As a result, some components of the rotary pump device such. B. mechanical seal of a drive are relieved. In addition, it is also achieved by the impeller back vane that a large part of the liquid working fluid passing through the openings into the separation device is transported away again radially outward. In this case, the blade device can be arranged in the housing such that the liquid working fluid is guided radially outwardly into the tangential discharge area of the outlet.

In advantageous developments, the separation device comprises at least one vacuum chamber. In such a vacuum chamber, a negative pressure can be applied to the opening or the openings in the axial region on the pressure side of the blade device. Thereby, the discharge of the gas can be supported from the delivery area, whereby a particularly effective removal of the accumulated gas from the delivery area is made possible.

In order not to suck away larger quantities of liquid working fluid during the extraction of the gas from the delivery area, the separation device comprises in preferred embodiments at least one separating plate device which is arranged between the vacuum chamber and the blade device. In this case, the separating plate device is particularly suitable and designed to pass substantially only gaseous fluid.

Furthermore, it is preferred that at least one drive device for rotating the rotation device is provided on the rotation pump device, which comprises at least one drive shaft. In this case, the drive shaft preferably comes into operative connection in the axial direction from the pressure side of the rotary pump device with the rotation device. The drive device in particular comprises a motor which causes the rotation of the rotation device. In addition, other control and control elements may be provided on the drive device.

Particularly preferably, the shaft of the drive device is guided through at least one opening in the separating plate device, wherein preferably at least a small gap remains free between the shaft and the separating plate device. If a negative pressure is applied to the openings in the rotating device, the accumulated gas is drawn together with a certain proportion of liquid working fluid in the direction of the vacuum chamber. Much of the liquid working fluid is conveyed axially outwardly by the impeller vane, which in combination with the small gap in the center of the separator plate means, substantially only the gaseous portion is drawn into the vacuum chamber through the opening in the separator plate means. Depending on the applied negative pressure and amount of the liquid working fluid but also liquid components can get into the vacuum chamber.

In order to apply a negative pressure to the axial region of the rotation device with the opening, in a particularly preferred embodiment of the separation device at least one vacuum pump device is associated. In this case, this vacuum pump device is preferably associated with the vacuum chamber. Such a vacuum pump device may, for. B. be designed as a liquid ring pump or as a side channel compressor. Depending on the type and mode of operation of the vacuum pump used, potentially explosive gas mixtures may arise. When selecting the vacuum pump device is therefore important to ensure that a vacuum pump device is used, in which either no explosive gas mixture can occur, or that the necessary safety precautions are taken to avoid hazards due to an explosive gas mixture.

In order to remove the extracted gas or the extracted working fluid safely with a substantial proportion of gas from the delivery area, the separation device comprises in advantageous developments at least one separation vessel device with at least one receiving area for extracted working fluid. Such a separation tank device is preferably designed such that the gas fraction can be separated from the liquid working fluid. On the one hand, the liquid working fluid can be returned to the working cycle for further use in the biogas plant. Furthermore, the withdrawn gas content can be removed from the system or even fed to a gas storage and the balance of the biogas plant is not lost.

Preferably, the separator container device is operatively connected to the vacuum pump device, wherein the vacuum pump is preferably connected downstream of the separator container device. This makes it possible for the vacuum pump device to pass through the gas accumulating in the delivery region through the container of the separator vessel device and through the vacuum pump device and then possibly collect it.

It is particularly preferred that the direction of action of the vacuum pump is reversible. In this case, the vacuum pump z. B. operated in different directions. Preferably, however, the working direction of the vacuum pump device is maintained, whereby by means of a special valve control, either a negative pressure or a pressure is applied to the separator tank device.

Furthermore, the separation container device can be particularly preferably also associated with at least one valve device, which is preferably designed as a check valve device. In this case, the valve device is provided in particular between the vacuum container and the separator container means. Thus, it can be ensured that no working fluid is pressed back into the vacuum container when the vacuum pump device applies no negative pressure to the separator tank means, but a pressure on the separator tank means.

Preferably, the separation tank device is associated with at least one level device with which the amount of fluid in the separation tank device can be determined. In this case, this level device is designed in particular as a float device. In this case, the level device may preferably also include a shut-off valve or be designed as such. Then, the level device automatically closes the access to the vacuum pump device as soon as a critical level is reached in the separator tank device. So no liquid can get into the vacuum pump device by a malfunction or incorrect operation.

It is preferred that the level device is associated with at least one sensor device. This makes it possible for the level device in conjunction with the sensor to automatically display a maximum level of the fluid in the separator container device. It can be z. B. a trained as a float device leveling device with increasing fluid level in the separator tanker float further and further upwards. At a certain maximum level, the float device then presses z. B. against a pressure sensor. By such a signal can then z. B. also the operation of the vacuum pump are turned off.

In other preferred embodiments, the rotation device is preceded by at least one intake screw device. The intake auger device serves in particular to ensure a uniform intake of working fluid into the rotating device. Thus, the rotating device is always provided sufficient working fluid.

In expedient developments, at least one carrier device is provided which comprises at least one container device with at least one first inlet for the working fluid to be delivered and at least one outlet, wherein at least one rotary pump device can be attached to the outlet.

Particularly preferably, the carrier device has at least one second inlet, to which the separator container device of the rotary pump device can be connected. This makes it possible for liquid working fluid separated off from the delivery region during the extraction of the gas to be transferred first into the separator container device and then back into the carrier device, whereby the discharged liquid working fluid can be returned to the rotary pump device.

So that there is no permanent connection between the separator container device and the carrier device, at least one closure device is provided in preferred developments at least between the carrier device and the separator container device. Such a closure device can, for. B. may be formed as a closure slide, which is flanged between the Abscheidebehältereinrichtung and the support means. Such a slide can be operated by motor or by hand. In this case, the slider can preferably be moved pneumatically, hydraulically or via a transmission device.

Particularly preferably, at least one control device is provided, which is suitable for controlling and in connection with various sensors also for controlling, for example, the rotary pump device, the drive device and also the separator container device, the closure device and the vacuum pump device.

In preferred developments, the control device is in particular in operative connection with the sensor device of the filling level device and the closure device. In this case, there is preferably also an operative connection with the vacuum pump device, so that upon reaching a maximum fill level of the fluid in the separator container device, the vacuum pump device is first automatically switched off, after which the closure device opens between the separator container device and the carrier device. Subsequently, the direction of action of the vacuum device can be reversed, whereby the working fluid is conveyed from the separator container back into the carrier device. Such a procedure may conveniently be carried out by hand.

Preferably, the carrier device is connected upstream of at least one feed-advancing device. This makes it possible that different components and also different supply lines from different storage tanks or areas of a biogas plant to the Zulaufverteilereinrichtung be connected and then introduced into the carrier device.

In this case, the feed distribution device in particularly preferred embodiments is associated with at least one substrate reduction device which homogenizes the working fluid to be conveyed before it is fed into the rotary pump device. In particular, a digestion or a defibration of the solids content in the working fluid is preferred.

The inventive method is suitable for operating a pump device, as described above. In this case, a rotary pump device is operated to promote a working fluid. The vacuum pump of the separator is activated when a power drop of the rotary pump device is detected by accumulating gas in the delivery area. By activating the vacuum pump, the gas flow in the delivery area is effectively eliminated, whereby an optimal delivery rate of the rotary pump device is ensured again.

Preferably, the vacuum pump is switched off again when the power of the rotary pump device has returned to normal.

The method according to the invention also has many advantages. In this case, an effective pump operation can be ensured by the method according to the invention, wherein the separation device is actively taken only in operation, even if a gas flow is really created in the delivery area.

Particularly preferably, the vacuum pump is switched off again when the level device of the separator tank device indicates a maximum level. This ensures, inter alia, that no liquid working fluid can be sucked by mistake in the vacuum pump.

In expedient developments, after the detection of a maximum fill level, the closure device between the separator container device and the carrier device is opened and / or the direction of action of the vacuum pump device is reversed. This makes it possible for the liquid working fluid to be led out of the separator container device back into the carrier device, whereby the liquid working fluid can be returned to the rotary pump device.

The biogas plant according to the invention comprises at least one fermenter and at least one pumping device of the type described above.

The biogas plant according to the invention also offers many advantages. A significant advantage is that by using the pump device according to the invention on or in the biogas plant malfunction of the system can be avoided by gas accumulations in the rotary pump.

Further advantages and features of the present invention will become apparent from the embodiments, which are explained below with reference to the accompanying figures.

In the figures show:

1 a purely schematic representation of a biogas plant with a pump device according to the invention;

2 a perspective view of a pump device according to the invention in a purely schematic representation;

3 a section through a pump device according to the invention in a purely schematic representation;

4 an enlargement of the area A in 3 ;

5 the representation according to 4 in a perspective view;

6 an enlargement of the area B in 3 ;

7 a perspective view of a rotating device in a purely schematic representation;

8th the rotation device according to 7 in a purely schematic view from below;

9 the rotation device according to 7 in a purely schematic view from above; and

10 a purely schematic sectional view of the rotation device according to 9 ,

In 1 is purely schematically a biogas plant according to the invention 100 represented, which a fermenter container 101 and a fermenter roof 102 includes. The fermenter roof is in the embodiment shown here as a foil roof 103 educated. In the fermenter tank 101 is a working fluid 3 contain, which a liquid portion 4 and a solids content 5 having. The working fluid 3 is in the embodiment shown here a biomass mixture from which biogas is to be obtained.

Next to the fermenter tank 101 one recognizes a pump device according to the invention 1 , which in the embodiment shown here with the fermenter tank 101 and with a reservoir 104 connected is. In this case, the pump device 1 among other things working fluid 3 from the reservoir 104 in the fermenter tank 101 pump. The pump device 1 but also with other containers or components of the biogas plant 100 in operative connection.

An embodiment of the pump device according to the invention 1 is in 2 shown purely schematically in a perspective view. It can be seen an inlet manifold 43 which has several flanges 46 has, to the leads, leads and other device components can be connected. In the embodiment shown here is on a flange 46 a substrate shredding device 44 Flanged, which here as a motorized substrate mill 47 is trained.

The inlet distributor device 43 is in the embodiment shown here via two terminals 48 with a carrier device 37 connected. To the connections 48 to release or close off are closure devices 42 provided, which in the embodiment shown here as a motorized slide 49 are formed. By the position of the slide 49 can be controlled here, whether the working fluid 3 directly or via the substrate mill 47 in the carrier device 37 is directed.

On the carrier device 37 is a rotary pump device 2 with a separator 14 flanged, wherein the separator container means 29 the separator 14 on another flange 46 the carrier device 37 is attached.

In this illustration you can still see a small part of the vacuum line 53 , from the not visible here vacuum chamber 22 the separator 14 into the separator container device 29 leads.

To the separator container device 29 is a vacuum pump device 28 connected by the separator tank means and the vacuum line 53 a negative pressure on the vacuum chamber 22 can create.

The rotary pump device 2 includes a drive device 24 and demands the working fluid 3 from the carrier device 37 through the outlet 10 z. B. from a reservoir in the fermenter tank 101 or from one fermenter tank to another.

In 3 is the pump device 1 according to 2 shown in a different perspective view in a purely schematic sectional view. Also in this view you can see the inlet manifold 43 connected to the carrier device 37 communicates.

The carrier device 37 has a container device 38 on, through which a working fluid 3 can be directed. This lead to a first inflow 39 and a feed 50 from the inlet manifold 43 in the carrier device 37 , To the process 40 the carrier device 37 is the rotary pump device 2 flanged.

The rotary pump device 2 is a separator 14 which also has a separator container device 29 includes, which on the second inlet 41 the carrier device 37 is flanged.

The sections marked as "A" and "B" will be in the 4 to 6 shown in detail magnifications in more detail. In 4 the detail enlargement of the area "A" is shown in a purely schematic sectional view and shows the rotary pump device 2 ,

The rotary pump device 2 has a suction side 6 and a print page 7 on. The rotary pump device 2 further comprises a housing means 8th that have an inlet 9 and an outlet 10 provides. Between the inlet 9 and the outlet 10 is a funding area 11 provided in which a rotation device 12 with a blade device 13 is arranged.

The blade device 13 includes in the embodiment shown here several pressure blades 51 , The rotation device 12 is also an intake auger device 36 assigned to the working fluid 3 from the container device 38 the carrier device 37 in the inlet 9 on the suction side 6 the rotary pump device 2 promoted.

The auger device 36 leads the working fluid 3 the rotation device 12 to, wherein the auger device 36 and the rotation device 12 from a shared in the embodiment shown here drive device 24 are driven. By the rotation of the rotation device 12 promotes the blade device 13 the rotation device 12 the working fluid 3 through the conveyor area 11 from the inlet 9 to the outlet 10 the rotation device 2 ,

By the suction on the suction side 6 can be in the working fluid 3 located gas bubbles relax or expand so that it in the rotation means 12 or in the area of funding 11 comes to a gas flow or a gas accumulation, which is the capacity of the rotary pump device 2 negatively influenced.

To remove this excess gas from the delivery area 11 to dissipate, is the rotary pump device 2 in the axial area on the pressure side 7 the rotary pump device 2 a separator 14 assigned. In addition, the rotation device 12 in the axially outer to the pressure side 6 directed area 15 openings 16 through which the accumulated gas can escape into the separator.

Through these openings 16 The accumulating gas can by rotating the rotating device 2 escaping centrifugal force.

To a particularly good removal of the gas from the delivery area 11 to ensure is above the openings 16 a separator 14 arranged, which in the embodiment shown here, a vacuum chamber 22 includes. The vacuum chamber 22 is in the embodiment shown here of the rotation device 12 by a separator plate device 23 separated.

The separator plate device 23 has an opening approximately in the middle 26 on, through which the drive shaft 25 the drive device 24 so as to be in contact with the blade means 13 the rotation device 12 to get. The opening 26 in the separator plate device 23 is designed such that between partition plate device 23 and drive shaft 25 a small gap 27 remains.

When extracting the gas from the delivery area 11 is not only gas, but also liquid working fluid 3 aspirated. Through the partition plate 23 will prevent larger amounts of liquid working fluid 3 in the vacuum chamber 22 reach.

In 5 the area "A" is shown purely schematically in a perspective view. Again, you can see the rotation device 12 with the blade device 13 which the working fluid 3 from the suction side 6 the rotary pump device 2 to the print side 7 promoted. One recognizes further also the vacuum chamber 22 , which by means of a separating plate device 23 from the openings 16 in the rotation device 12 is separated.

It can also be seen that on the axially outer side 15 the rotation device 12 Impeller back vanes 21 are provided, which on the one hand through the openings 16 entered liquid working fluid 3 remove as far as possible laterally. In addition, the impeller backs become 21 a back pressure to that through the pressure paddles 51 the blade device 13 generated pressure, which some components of the rotary pump device 2 can relieve. In particular, the mechanical seals are 52 the drive device 24 relieved.

At the vacuum chamber 22 is a vacuum line 53 provided, via which a negative pressure by means of a vacuum pump device 28 on the vacuum chamber 22 can be exercised. The vacuum line runs 53 in the embodiment shown here in the separator container device 29 the separator 14 ,

The area "B" in 3 , which the separation container device 29 shows is purely schematic in a detail magnification in 6 shown.

The separator container device 29 includes a receiving area 30 in which the liquid working fluid 3 passing through the vacuum line 53 is sucked, can be absorbed. It is in the upper part of the separator container device 29 a gas connection 54 provided on which a two-way valve 55 is provided, which the vacuum pump device 28 is downstream.

In the separator container device 29 is a level device 33 arranged, which the level of the liquid working fluid 3 in the recording area 30 can show. Here is the level device 33 in the embodiment shown here as a float device 44 educated. The level device 33 has a display device 56 on, over which the level in the receiving area 30 can be read. In 6 are two level stands of the float device 33 shown purely schematically.

Furthermore, the float device comprises 44 in the embodiment shown here, a shut-off valve 60 in that the float rod designed as a valve rod 61 is moved depending on the level. When a critical level is reached, the shut-off valve closes 60 the access to the vacuum pump device 28 safe off. Thus, damage to the vacuum pump device 28 by a malfunction or incorrect operation of the pump device 1 be avoided.

If a maximum level is reached, the vacuum pump device can automatically or also manually 28 be switched so that an overpressure on the separator container means 29 is exercised. Then, the separation tank device 29 about this pressure in the support means 37 be emptied when the closure device 42 between separator container device 29 and support means 37 is opened.

To a return or return of working fluid 3 through the pipe 53 in the vacuum chamber 22 to avoid is on the line 53 a valve device 31 provided, which in the embodiment shown here as a check valve device 32 is executed. This valve device 31 gives the vacuum line 53 free, as long as a negative pressure on this line 53 is exercised. If, however, a pressure or overpressure on the check valve 32 exerted, closes the vacuum line 53 automatically.

To work with the vacuum pump device 28 To create both negative pressure and pressure on the separator container means, this can be operated for example in two directions. In the embodiment shown here, however, the pressure side of the vacuum pump device 28 to the two-way valve 55 recycled. Thus, the position of the two-way valve can be easily adjusted, whether pressure or negative pressure to the separator tank means 29 should be created.

In 7 is a rotation device 12 a rotary pump device 2 shown purely schematically in a perspective view.

The rotation device 12 is in an embodiment shown here as a semi-open radial flow impeller 17 educated. In this case, the radial impeller has 17 a plate device 18 on which the blade means 13 is included, which here as pressure paddles 51 are formed. In the central area of the radial flow circuit 17 is a recording 57 provided, in which the drive shaft 25 the drive device 24 can intervene.

In rotation device 12 or in the plate device 18 are four openings in the embodiment shown here 16 provided, of which in the illustrations shown only two openings 16 you can see. These openings 16 are here as holes 58 executed, and serve to accumulated in the delivery area gas axially outward to the pressure side 7 a rotary pump device 2 dissipate.

In 8th is the in 7 illustrated rotation device 12 shown in a purely schematic view from below. Again, you can see the recording 57 for the drive shaft 25 the drive device 24 and those as pressure paddles 51 executed blade device 13 , The openings 16 are due to the design of the blade device 13 not visible in this view.

In 9 is the radial flow impeller 17 shown in a purely schematic view from above. Here you can see the plate device 18 in which the openings 16 for extracting gas from the delivery area 11 are attached. It can also be seen that on the axially outer side 59 the plate device 18 in the example shown here 4 impeller back vanes 21 are arranged.

These impeller shovels 21 practice in the rotation of the rotation device 12 a back pressure to the pressure generated by the pressure paddles 51 is caused. As a result, among other things, the mechanical seals 52 the drive device 24 be relieved. In addition, liquid working fluid 3 passing through the openings 13 is sucked in, to a large extent by the impeller back vanes 21 discharged to the outside.

In 9 you can also see that the openings 16 are brought close to the center in the rotation devices. It is particularly advantageous if the openings 16 in the inner half 19 the rotation device 12 are provided.

For a better overview is the rotation device 12 in 10 again a purely schematic in a sectional side view. Again, you can see the plate device 18 at which the blade means 13 is included. You can also see on the axially outer side 59 the plate device 18 one of the impeller back vanes 21 ,

In other embodiments is also the use of other rotation devices 12 conceivable. In particular, it is also possible to use a closed radial flow impeller in the rotary pump device 2 to use.

It can also be beneficial if the inlet 9 for the working fluid 3 in the rotary pump device 2 not axially, but also radially on the rotary pump device 2 is arranged. In such an embodiment, it is z. B. also possible that the auger device 36 in the inlet 9 to the rotary pump device 2 essentially transverse to the rotation device 12 is arranged. Then the auger device sucks 36 the working fluid 3 laterally in the rotary pump device 2 into where they are from the rotation device 12 through the conveyor area 11 from the inlet 9 in the outlet 10 is transported. Even in such an embodiment may be in Förderelbech 11 damming gas through the openings 16 in the rotation device 12 to the print side 7 be transported away.

LIST OF REFERENCE NUMBERS

1

pump device

2

Rotary pump device

3

working fluid

4

liquid fraction

5

Solids

6

suction

7

pressure side

8th

housing means

9

inlet

10

outlet

11

Förderbereich

12

rotation means

13

scoop means

14

separating

15

outer area

16

opening

17

Radial flow impeller

18

dishes ordering

19

inner half

20

conveying direction

21

Impeller rear vane

22

Vacuum chamber

23

separating plate

24

driving means

25

drive shaft

26

opening

27

gap

28

Vacuum pump device

29

Abscheidebehältereinrichtung

30

reception area

31

valve means

32

Check valve means

33

level facility

34

float device

35

sensor device

36

Einzuschneckeneinrichtung

37

support means

38

container means

39

first feed

40

procedure

41

second inlet

42

closure device

43

Intake manifold

44

Substrate comminution device

45

sensor

46

flange

47

substrate mill

48

connection

49

pusher

50

Intake

51

pressure shovel

52

Mechanical seal

53

Vacuum line

54

gas connection

55

Two-way valve

56

display

57

admission

58

drilling

59

axially outer region

60

off valve

100

biogas plant

101

Fermenter (tank)

102

fermenter roof

103

membrane roof

104

reservoir

Claims (28)

Pump device ( 1 ) with at least one rotary pump device ( 2 ), in particular for a biogas plant ( 100 ), to promote a working fluid ( 3 ) containing at least one liquid fraction ( 4 ) and at least one solids content ( 5 ), wherein the rotary pump device ( 2 ) at least one suction side ( 6 ) and at least one printed page ( 7 ) and wherein the rotary pump device ( 2 ) at least one housing device ( 8th ), wherein the housing device ( 8th ) at least one inlet ( 9 ) for the working fluid ( 3 ) on the suction side ( 6 ) and at least one outlet ( 10 ) for the working fluid ( 3 ) on the printing side ( 7 ), wherein between the inlet ( 9 ) and the outlet ( 10 ) at least one funding area ( 11 ) is provided, wherein in the funding area ( 11 ) at least one rotation device ( 12 ) with at least one blade device ( 13 ) is arranged, which the working fluid ( 3 ) from the inlet ( 9 ) through the funding area ( 11 ) to the outlet ( 10 ) and the outlet ( 10 ) for the working fluid ( 3 ) on the pressure side ( 7 ) of the rotary pump device ( 2 ) is guided substantially laterally outwards and wherein the rotation device ( 12 ) is adapted and suitable for, the working fluid ( 3 ) on the pressure side ( 7 ) of the rotary pump device ( 2 ) laterally outward into the outlet ( 10 ), characterized in that on the pressure side ( 7 ) of the rotary pump device ( 2 ) in the axial direction at least one separation device ( 14 ) and that the rotation device ( 12 ) in the axially outer region ( 15 ) on the pressure side ( 7 ) at least one opening ( 16 ) for separating working fluid ( 3 ) with a substantial proportion of gas in the separator ( 14 ) having. Pump device ( 1 ) according to claim 1, characterized in that the rotation device ( 12 ) as a semi-open or closed radial impeller ( 17 ) is trained. Pump device ( 1 ) according to the preceding claim, characterized in that the opening ( 16 ) in one of the printing side ( 7 ) facing plate device ( 18 ) of the radial flow impeller ( 17 ) is arranged. Pump device ( 1 ) according to one of the preceding claims, characterized in that the opening ( 16 ) in the radially inner half ( 19 ) of the plate device ( 18 ) is arranged. Pump device ( 1 ) according to one of the preceding claims, characterized in that the conveying direction ( 20 ) through the funding area ( 11 ) is directed substantially from axially to radially. Pump device ( 1 ) according to one of the preceding claims, characterized in that the rotation device ( 12 ) at least one impeller back vane ( 21 ) having. Pump device ( 1 ) according to one of the preceding claims, characterized in that the separating device ( 14 ) at least one vacuum chamber ( 22 ). Pump device ( 1 ) according to the preceding claim, characterized in that the separating device ( 14 ) at least one separating plate device ( 23 ), which between the vacuum chamber ( 22 ) and the blade device ( 13 ) is arranged. Pump device ( 1 ) according to one of the preceding claims, characterized in that at least one drive device ( 24 ) for rotating the rotation device ( 12 ) is provided, the at least one drive shaft ( 25 ), which in the axial direction from the pressure side ( 7 ) of the rotary pump device ( 2 ) with the rotation device ( 12 ) enters into operative connection. Pump device ( 1 ) according to the preceding claim, characterized in that the drive shaft ( 25 ) through an opening ( 26 ) in the separator plate device ( 23 ), wherein a gap ( 27 ) between drive shaft ( 24 ) and separating plate device ( 23 ) remains. Rotary pump device according to one of the preceding claims, characterized in that the separating device ( 14 ) at least one vacuum pump device ( 28 ) assigned. Pump device ( 1 ) according to one of the preceding claims, characterized in that the separating device ( 14 ) at least one separation container device ( 29 ) with at least one receiving area ( 30 ) for working fluid ( 3 ). Pump device ( 1 ) according to the preceding claim, characterized in that the vacuum pump device ( 28 ) with the separator container device ( 29 ) is in operative connection and this is in particular downstream. Pump device ( 1 ) according to one of the two preceding claims, characterized in that the direction of action of the vacuum pump device ( 28 ) is reversible and / or that the separation container device ( 29 ) at least one valve device ( 31 ) and in particular a check valve device ( 32 ) assigned. Pump device ( 1 ) according to any one of claims 12-14, characterized in that the separation tank device ( 29 ) at least one level device ( 33 ), in particular as a float device ( 34 ) is trained. Pump device ( 1 ) according to the preceding claim, characterized in that the level device ( 33 ) at least one sensor device ( 35 ) assigned. Pump device ( 1 ) according to one of the preceding claims, characterized in that the rotation device ( 12 ) at least one snuffing device ( 36 ) is connected upstream. Pump device ( 1 ) according to one of the preceding claims, characterized in that at least one carrier device ( 37 ) is provided, which at least one container device ( 38 ) with at least one first feed ( 39 ) for the working fluid ( 3 ) and at least one process ( 40 ), wherein at the expiration ( 40 ) at least one rotary pump device ( 2 ) is attachable. Pump device ( 1 ) according to the preceding claim, characterized in that the carrier device ( 37 ) at least one second feed ( 41 ) to which the separator container device ( 29 ) is connectable. Pump device ( 1 ) according to the preceding claim, characterized in that between the carrier device ( 37 ) and the separator container device ( 29 ) at least one closure device ( 42 ) is provided. Pump device ( 1 ) according to one of the preceding claims, characterized in that at least one control device ( 43 ) and / or at least one sensor ( 46 ) is provided. Pump device ( 1 ) according to the preceding claim, characterized in that the control device at least with the rotary pump device ( 2 ) and / or with the separation device ( 14 ) is in operative connection. Pump device ( 1 ) according to one of claims 18-22, characterized in that the carrier device ( 37 ) at least one feed distributor device ( 44 ) is connected upstream. Pump device ( 1 ) according to the preceding claim, characterized in that the feed distributor device ( 44 ) at least one substrate comminution device ( 45 ) assigned. Method for operating a pump device ( 1 ) according to one of the preceding claims, characterized in that the rotary pump device ( 2 ) and that the vacuum pump device ( 28 ) of the separation device ( 14 ) is activated when a power drop of the rotary pump device ( 2 ) is detected. Method according to the preceding claim, characterized in that the vacuum pump device ( 28 ) is switched off when the filling level device ( 33 ) of the separator container device ( 29 ) detects a maximum level. Method according to the preceding claim, characterized in that at least the closure device ( 42 ) between the separator container device ( 29 ) and the carrier device ( 37 ) and / or that the direction of action of the vacuum pump device ( 28 ) is reversed. Biogas plant ( 100 ) with at least one fermenter 101 and at least one pumping device according to any one of claims 1-24.

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