DE102016202892A1 - Device for sealing a pump and pump sealing system and use of a stuffing box in the device - Google Patents

Abstract

The invention relates to a pump sealing device (1) for sealing a pump (30), which is driven by a motor (20) by means of at least one shaft (3, 5), with respect to the environment (U), with at least one pump-side shaft seal (72). wherein the Pumpenabdichtvorrichtung (1) comprises a fluid-tight with motor (20) and pump (30) detachable collecting reservoir (10) which can be arranged between the motor and pump and two clutches (12, 13), by means of which it fluid-tight on the one hand with the pump and on the other hand with the motor (20) is connectable such that the collecting reservoir (10) in the coupled state between the motor and the pump a fluid-tight from the environment (U) delimited inner volume (V), wherein the clutches (12, 13) independent of the pump-side shaft seal (72; 40) are. Further, a pump sealing system (100) is concerned with such a pump sealing device (1).

Description

The invention relates to a device for sealing a driven by a motor by means of at least one shaft, fluids pump conveying to the environment, with at least one pump-side shaft seal. Furthermore, pump sealing systems comprising a pump and a drive shaft to be sealed are concerned, especially those systems which are designed for contaminated water, e.g. are provided in a coking plant.

Pumps have to be environmentally sealed in many situations, especially when used in a coking plant for conveying toxic or polluted media, e.g. Benzene, tar, sulfuric acid or generally contaminated water. Even though these are primarily fluids, they can be contaminated with solids. The sealing of such process pumps may e.g. by means of mechanical seals or by a magnetic coupling. In particular, solids or particles then cause the seal to age quickly or to fail completely. Therefore, there is usually a high need for repair or repair. There are known applications in which a respective pump or at least the sealing system must be constantly replaced or repaired. Unfortunately, the costs and the effort are very high.

In many cases, such a pump is driven by a motor which is connected via a shaft or a shaft system and optionally also at least one coupling with the pump. In such arrangements, a risk or contamination risk primarily arises from the pump. In many cases, the engine is not directly in contact with pollutants or contaminated fluids.

The object of the invention is to provide a device with the features described above, in which a seal can be done in a simple, robust or particularly cost-effective manner.

This object is achieved by a Pumpenabdichtvorrichtung for sealing a driven by a motor by means of at least one shaft, fluid pump over the environment, with at least one pump-side shaft seal, wherein the Pumpenabdichtvorrichtung comprises a fluid-tight, in particular gas-tight coupling with motor and pump collecting reservoir, which between the motor and pump can be arranged and two couplings, by means of which it is fluid-tight on the one hand with the pump and on the other hand connected to the engine so that the collecting reservoir in the coupled state between the motor and pump defines a fluid-tight demarcated from the environment inner volume, the clutches are independent or separate from the pump-side shaft seal or coupling. This can be done an additional seal, which is independent of the shaft seal.

The couplings can be considered as an additional seal. The provision or decoupling of the coupling completely separate from the pump-side shaft seal allows to reduce the functions to be fulfilled by the pump-side shaft seal or requirements placed on it. For example, no particularly high demands on a seal on the rotating shaft must be made. In other words, the pump-side shaft seal may be simpler, less expensive, more robust, and / or less complex than e.g. a mechanical seal. It has been shown that thanks to the partitioning by means of a collecting reservoir, the pump-side shaft seal can be designed in particular as a cost-effective, robust stuffing box. By means of the collecting reservoir, for example, the retention of gaseous impurities can take place. A connection to an ECS is comparatively easy.

The collecting reservoir is set up to be connected in a gastight manner to both the motor and the pump, thereby limiting an internal volume sealed from the environment. The internal volume may be limited by the pump on the pump side and by the motor on the motor side and be isolated from the environment. The collection reservoir may provide a hermetically sealed volume for discharging fluids.

The collecting reservoir can be at least partially, e.g. be designed as a gas-tight and gas-tight coupled tube with hermetically enclosed internal volume, in which the at least one shaft is sealed fluid-tight relative to the environment.

As a pump or (ange) flanged pump is any type of pump to understand, which is adapted to promote fluids and is sealed against the environment. In particular, pumps with a capacity in the range of 0 to 500m ³ / h are affected.

As fluid-tight is to be understood a seal that is designed to ensure at least in terms of liquids, in particular contaminated water tightness and to prevent leakage. Optionally, additionally tightness with respect to gases can be ensured, in particular with a predefinable leak rate, if certain applications demand this.

According to one embodiment, at least one of the clutches on the motor or on the pump circumferentially sealed and / or circumferentially attached. As a result, a high tightness can be achieved. A circumferential attachment allows, for example, a homogeneous contact pressure.

Preferably, both clutches are fixed fluid-tight by means of a peripheral flange, in particular screw on the motor or on the pump. The respective coupling can be ring-like. This simplifies the use of standard sealing elements such as e.g. metallic sealing rings or plastic or rubber sealing rings.

According to one embodiment, at least one of the couplings comprises a screw connection. This provides a robust, easily adjustable connection.

According to one embodiment, the pump-side and / or the motor-side coupling has at least one fluid-tight sealing element, in particular a sealing ring. In this way, the respective coupling also allows you to adapt to certain conditions of use, e.g. to a particularly aggressive fluid. The material of the sealing ring can be chosen freely, in particular independently of the material of a coupling flange.

According to one embodiment, at least one of the clutches is a static coupling with statically without relative movement relative to each other arranged sealing surfaces. This allows a particularly simple design and high tightness of the coupling. Leaks in relatively moving surfaces can be avoided.

According to one embodiment, the internal volume in cross-section is at least partially cylindrical. As a result, dead spaces or undercuts can be avoided. Spilled fluid can be easily collected or detected.

According to one embodiment, the internal volume in cross-section is at least partially rectangular or has at least in sections in the longitudinal or transverse direction at least one planar side, in particular a flat underside. This allows fluid to be routed in certain directions or provide a flat pad for connection or access.

According to one exemplary embodiment, the collecting reservoir has access at least to the pump-side shaft seal. This facilitates adjustment or at least maintenance or checking of the pump-side shaft seal. A clutch then does not necessarily have to be released. The access may also have a fluid-tight seal.

The access can e.g. be temporarily used for a readjustment or maintenance or control of the pump-side shaft seal. Preferably, the access is arranged in manual range of the pump-side shaft seal. For example, the access is designed as a hermetically sealable flap or hatch or flange cover.

According to one exemplary embodiment, an underside of the collecting reservoir has a gradient at least in sections. This allows fluid to pass to an outlet or sump and can be collected.

According to one exemplary embodiment, an underside of the collecting reservoir has a discharge leading to a connection, in particular an outlet arranged concentrically around the connection. As a result, fluid can be effectively removed. Residues can be avoided.

According to one exemplary embodiment, a bulkhead, in particular baffle, is arranged on an inner lateral surface of the collecting reservoir, at least approximately transversely to the longitudinal direction of the at least one shaft, and is connected in a fluidtight manner to the inner lateral surface. As a result, further components arranged within the internal volume can be protected. Contact with escaped fluid can be avoided.

All these measures can facilitate the discharge of fluids, in particular such that storage or sealing of the shaft of the motor on the engine is not affected. In other words, these measures can ensure that, even with heavily contaminated fluids, a conventional, standard motor shaft bearing or seal is sufficient. The fluid can be passed to a lowest point of the collection reservoir and collected there or discharged directly or continuously.

According to one exemplary embodiment, the pump sealing device, in particular the collecting reservoir, has at least one connection to an emission control system ECS. In this way, in particular gaseous components can be removed or at least diagnosed. The ECS can also carry out concentration monitoring or reduce or regulate the concentration of pollutants.

According to one embodiment, the pump sealing device, in particular the collecting reservoir, has a connection to a slop system on. As a result, fluid can be removed from the collecting reservoir, in particular partially or fully automatically. The connection can be operated manually or by motor. The connection may comprise, for example, at least one valve whose position (open, closed) can be controlled or regulated.

According to one embodiment, the collecting reservoir comprises a tube or is tubular, or an outer contour or lateral surface of the collecting reservoir is at least partially formed by a tube. The use of a pipe section to form the hermetically sealed interior volume may have several advantages, e.g. the use of standard flanges, the flanging of the pump or the motor in a relatively simple manner, good stability, cost advantages, symmetrical load distribution, or even the supply of fluids to a lowest point in the collection reservoir. The tube shape may be provided from the pump to the engine in the entire intermediate region. The cylindrical surface provides a smooth inside without corners or undercuts, so that contaminated fluid can be easily collected and removed. Optionally, a sump or a kind of bilge can be formed on the underside of the collecting reservoir, that is to say a lowest point with an even deeper region of the internal volume in which the fluid can accumulate. This then makes it possible in a particularly simple manner to empty the collecting reservoir, in particular also only at predefined times. This also makes it possible to keep the collecting reservoir closed at least temporarily or to connect it only with an ECS. As a result, the handling of contaminated fluids can be better controlled or monitored.

According to one embodiment, the pump-side shaft seal comprises at least one compressible seal, in particular a stuffing box. It has been shown that thanks to the collection reservoir a very robust, cost-effective seal can be used. Glands provide many advantages, especially in aggressive media or in terms of the requirement of high robustness.

By using at least one stuffing box for the pump-side shaft seal, the cost of sealing the pump can be reduced by a large factor compared to mechanical seals used in many applications, in particular by a factor of 20 to 30. A gland also has the advantage that it can in a simple way also without special expertise is adjustable, in particular by axial tensioning. The stuffing box or a device for adjusting or readjusting the stuffing box can act on the pump.

The stuffing box can take over several functions despite very simple structure, in particular the sealing both in terms of liquids and gases or lubrication. Compared to a mechanical seal, it is expected that the seal will not be as good. However, this is not a disadvantage since leaking fluids can be collected by means of the collection reservoir and retained and disposed of in the environment. The stuffing box can provide advantages over more modern elastomer seals especially at high temperatures.

In particular, when pumping aggressive or contaminated media glands can have great advantages. The sealing material can be selected in a particularly flexible manner for the application, and a contact pressure can be adjusted depending on the application or operating mode of the pump in a simple manner. The sealing material can also be easily replaced, which is advantageous in terms of a long service life with low maintenance costs or little expertise of maintenance professionals, e.g. in remote areas with poor technical equipment.

The stuffing box, in particular its stuffing box packing or sealing element, can consist of a material which is particularly suitable for a particular application, e.g. made of plastic, in particular PTFE, fiber materials, rubber, metal or at least one metal alloy or iron, and in particularly aggressive media from known special materials, in particular of at least one nickel-based alloy.

Preferably, the stuffing box or the pump-side shaft seal is adjustable. As adjustable is to be understood a stuffing box, in which the axial prestress and thereby also the radial sealing effect can be adjusted, e.g. by positioning and fixing a sleeve or stuffing box gland in a predefinable axial relative position.

According to one embodiment, the pump-side shaft seal is attached to an outside of the pump and biased axially in the direction of the shaft. This also allows good access to the pump-side shaft seal.

The above object is also achieved by a pump sealing system having a pump sealing apparatus described above, comprising: a motor; a pump; at least one motor and pump coupling shaft, which in each case is sealed in particular at a shaft connection to the pump and at least stored on the engine, wherein the motor is a fluid-tight with a Coupling part of the collecting reservoir of Pumpenabdichtvorrichtung cooperating coupling part, and wherein the pump has a fluid-tight manner with a coupling part of the collecting reservoir of Pumpenabdichtvorrichtung cooperating coupling part, wherein the collecting reservoir a fluid surrounding the pump-side shaft seal inner volume in the coupled state of the environment delimits.

As described above, the at least one shaft is fluid-tight, in particular gas-tight, enclosed by a collecting reservoir, which is fluid-tightly connected both to the motor and to the pump and thereby delimits an inner volume or collecting volume sealed from the environment.

The pump has a coupling part which corresponds to the corresponding coupling part of the collecting reservoir. The pump-side coupling part may e.g. be designed as a circumferential, in particular ring-like flange. Optionally, the pump-side coupling part may comprise a sealing element. The pump can be designed as a flanged pump.

According to one embodiment, the pump sealing system, in particular the collecting reservoir, is coupled in a fluid-tight manner to an emission control system ECS. In this way, monitoring of emissions or optionally also controlling or regulating the delivery or disposal of fluid collected in the collecting reservoir can take place.

According to one embodiment, the pump sealing system, in particular the collecting reservoir, is coupled fluid-tight to a sloping system. As a result, fluid can be disposed of in a particularly pragmatic or simple manner, for example, also fully automatically continuously, or at predetermined times.

The aforementioned object is also achieved according to the invention by using a stuffing box as a shaft seal on a pump, in particular in a pump sealing device described above, wherein the stuffing box is fluid-tightly enclosed in a fluid-tight at least at the pump from the environment defined inner volume, in particular at one to a motor leading wave. This results in previously described advantages.

The aforementioned object is also achieved by using a pump with gland as shaft seal in a device for sealing pumps in a coking plant, in particular in a previously described Pumpenabdichtvorrichtung, the stuffing box by means of a coupled to the pump, in particular flanged collection reservoir fluid-tight from the Environment is defined, which is fluid-tightly connected to a slop system. This results in previously described advantages.

Further features and advantages of the invention will become apparent from the description of the following embodiments with reference to drawings, and from the drawings themselves. In this case, individual features of each embodiment can be combined with the other embodiments, unless this is explicitly denied. It shows

1 a conventional arrangement and sealing of a pump, which is driven by a motor arranged next thereto;

2 in a schematic representation in a side view of a Pumpenabdichtvorrichtung or a Pumpenabdichtsystem according to an embodiment;

3A . 3B in each case a schematic representation in a side view of a Pumpenabdichtvorrichtung according to an embodiment in the coupled and uncoupled state;

4A . 4B in each case a schematic representation in a side view of a Pumpenabdichtvorrichtung according to an embodiment in the coupled and uncoupled state;

5 in a schematic representation in a side view of a Pumpenabdichtvorrichtung according to an embodiment;

6 in a schematic representation in the assembled state, a seal with stuffing box for use as a pump-side shaft seal a Pumpenabdichtvorrichtung according to one of the embodiments; and

7A . 7B . 7C in each case in schematic representation with a view to the pump-side coupling a Pumpenabdichtvorrichtung and a pump with a coupling part for coupling a collecting reservoir of a Pumpenabdichtvorrichtung according to one of the embodiments, on the one hand with and on the other hand without stuffing box.

For reference numbers that are not explicitly described with respect to a single figure, reference is made to the other figures.

The 1 shows a motor 20 and a pump 4 which by means of waves 3 . 5 and a clutch 7 connected to each other. pump 4 and engine 20 can eg on a frame 8th mounted and be positioned and aligned relative to each other. The wave 5 is at a wave connection 32 at the pump 4 stored and by means of the seal 72 sealed, and the shaft 3 is at a wave connection 22 at the engine 20 stored. The seal 72 is designed for example as a mechanical seal.

The with the reference number 71 designated mechanical interface between engine 20 and wave 3 For example, it may include a bearing, a gasket or a sealing system. To this interface 71 usually no particularly high demands on the tightness must be made. This interface 71 usually does not come in contact with contaminated media.

The 2 shows a pump sealing system 100 with a pump sealing device 1 and a sealed environment U sealed pump 30 , Between the pump 30 and the engine 20 is a collection reservoir 10 provided, which defines an internal volume V fluid-tight from the environment U and both to the pump 30 as well as to the engine 20 is coupled.

The collection reservoir 10 forms with the engine 20 a gas-tight coupling 12 and with the pump 30 another gas-tight coupling 13 , In a lateral surface 14 or wall of the collecting reservoir 10 is at least a window 18 as well as an access 17 provided for pump-side shaft seal. The pump-side shaft seal is as a stuffing box 40 executed or includes these. At a bottom 14.1 the wall 14 is a connection 16 to a slop system 60 provided, which means 61 a derivative 61 with the collection reservoir 10 connected is. An outlet 16.2 leads to the connection 16 , The optional spout 16.2 can facilitate the discharge of liquids. The spout 16.2 may be formed, for example, by obliquely downwardly extending sheets or a corresponding conical pipe connection. A use of the slop system 60 In particular, it also has the advantage that further monitoring systems or sensors are not necessarily required.

At the collection reservoir 10 can also have a connection 15 to an emissions control system ECS 50 be provided. The ECS 50 can detect the emissions of the pump or of the engine and control or regulate the amount or concentration actually delivered to the environment U. The ECS 50 can be operated or operated by means of nitrogen gas, for example. The entire arrangement may be certified according to air pollution control regulations, eg according to the so-called Technical Instructions on Air Pollution Prevention (TA Luft).

The dashed double arrow is a storage 80 with at least one translational degree of freedom (here in the x direction) indicated. The motor 20 For example, can be mounted on rails or other axial guide so displaceable that an axial displacement relative to the pump 30 and thereby also a decoupling of the collecting reservoir 10 can be done. Optionally, alternatively or additionally, the pump 30 be stored translationally displaceable.

The 3A shows in a modification to 2 an outlet 16.2 which extends along the entire underside 14.1 extends. Warehousing 80 is intended for both the engine and the pump. The 3B shows the engine 20 in the uncoupled state, the clutch 12 by means of fasteners 12.2 (eg screw holes) at the collection reservoir 10 and corresponding fasteners 22.2 (eg internally threaded holes) on the engine 20 can be realized.

A gas-tight connection 12 can by two gas-tight connectable coupling parts 12.1 . 22.1 be formed, which are screwed together using a sealing element, in particular sealing ring or a flat gasket (not shown), for example. The sealing element may be made of metal or graphite, for example, or of plastic or rubber. A screw connection has advantages such as easy adjustability, good accessibility and maintenance, reversible opening / closing or coupling of the gas-tight connection 13 ,

Furthermore, screws are indicated, by means of which the gas-tight connection 12 can be ensured. The screw connection includes screw holes 12.2 from the collection reservoir 10 and internally threaded holes 22.2 from the engine, or vice versa. The coupling 12 can thus be at least partially formed by a screw.

The 4A shows in a modification to 2 one at the bottom 14.1 attached bulkhead 11 , In the collection reservoir 10 Several sensors are arranged in conjunction with the ECS 50 can stand, in particular a gas sensor 51 , a pressure sensor 52 , a first fluid sensor 53 and a second fluid sensor 54 , each for one or more liquids or gases. The fluid sensors 53 . 54 are at the bottom 14.1 arranged and can thereby detect a level or the presence of fluid. The other sensors 51 . 52 are arranged by way of example at the top, but may also be arranged at alternative positions.

The 4B shows one on the pump 30 decoupled arrangement. A gas-tight connection 13 can by two gas-tight connectable coupling parts 13.1 . 33.1 be formed, which are screwed together using a sealing element, in particular sealing ring or a flat gasket (not shown), for example. The sealing element may be made of metal or graphite, for example, or of plastic or rubber.

Furthermore, screws are indicated by means of which the gas-tight connection 13 can be ensured. The screw connection includes screw holes 13.2 from the collection reservoir 10 and internally threaded holes 33.2 from the pump, or vice versa. The coupling 13 can thus be at least partially formed by a screw.

The 5 shows a pump sealing system 100 without connection to a slop system 60 , At the connection 16 is a lid 16.1 provided over which liquids can be removed from the shelter V. If you do not use a slop system, or if a slop system does not exist, you can monitor how the stuffing box works 40 by means of at least one additional sensor 90 be beneficial.

The 6 shows a pump-side shaft seal with stuffing box 40 in mounted position on the pump 30 on the wave 5 , The pump 30 has a socket 32.1 on, in which a stuffing box pack 41 at a stop 32.3 is stored. By means of a fastening ring 43 and fasteners 43.2 (eg screws) can be a gland 42 the stuffing box packing 41 in the x direction against the stop 32.2 Pretension.

The 7A . 7B . 7C show in addition to previous figures also still on the motor-side coupling part 12.1 arranged sealing element 12.3 or on the pump-side coupling part 13.1 arranged sealing element 13.3 , It can be seen that the respective coupling part 13.1 . 33.1 the pump-side shaft seal 40 or the stuffing box outside bounded, in particular concentric thereto.

LIST OF REFERENCE NUMBERS

1

Pumpenabdichtvorrichtung

3

Wave at the engine

4

conventional pump

5

Wave at the pump

7

clutch

8th

frame

10

 fluid-tight, in particular gas-tight coupling collecting reservoir, in particular in tube form

11

Schott, in particular Staublech

12

gas-tight connection or coupling to the engine

12.1

motor-side coupling part at the collection reservoir

12.2

Fastening means, in particular screw holes

12.3

Sealing element, in particular sealing ring

13

gastight connection or coupling to the pump

13.1

Pump-side coupling part at the collection reservoir

13.2

Fastening means, in particular screw holes

13.3

Sealing element, in particular sealing ring

14

Outer contour or lateral surface

14.1

bottom

15

Connection to an ECS

16

Connection for disposal or treatment, in particular to a slop system

16.1

connection cover

16.2

Spout or lowest point or swamp

17

Access to the pump-side shaft seal

18

Windows, in particular sight glass

20

engine

22

shaft connection

22.1

Coupling part on the engine

22.2

Fasteners, in particular internally threaded holes

30

sealed pump, in particular flanged pump

32

shaft connection

32.1

Rifle

32.2

attack

33.1

Coupling part to pump

33.2

Fasteners, in particular internally threaded holes

40

Pump-side shaft seal in the form of at least one stuffing box

41

Stuffing box packing or sealing element

42

Stuffing box gland or sleeve

43

fixing ring

43.2

Fastening means, in particular for axial clamping

50

Emission Control System or Emission Control System ECS

51

first sensor, in particular gas sensor

52

second sensor, in particular pressure sensor

53

third sensor, in particular fluid sensor

54

fourth sensor, in particular fluid sensor

60

Slopsystem

61

Discharge or outlet

71

Bearing, seal or sealing system on the motor side

72

conventional pump-side shaft seal, e.g. Mechanical seal or magnetic coupling

80

Storage with at least one translatory degree of freedom

90

Sensor or monitoring system

100

Pumpenabdichtsystem

U

Surroundings

V

Shelter or bounded internal volume

Claims (15)

Pump sealing device ( 1 ) for sealing one of a motor ( 20 ) by means of at least one shaft ( 3 . 5 ) driven, fluid-conveying pump ( 30 ) with respect to the environment (U), with at least one pump-side shaft seal ( 72 ), characterized in that the pump sealing device ( 1 ) a fluid-tight with motor ( 20 ) and pump ( 30 ) detachable collection reservoir ( 10 ), which can be arranged between the motor and pump and two couplings ( 12 . 13 ), by means of which it is fluid-tight on the one hand with the pump and on the other hand with the motor ( 20 ) is connectable such that the collecting reservoir ( 10 ) in the coupled state between motor and pump a fluid-tight from the environment (U) delimited inner volume (V) bounded, wherein the clutches ( 12 . 13 ) regardless of the pump-side shaft seal ( 72 ; 40 ) are. Pump sealing device ( 1 ) according to claim 1, wherein at least one of the couplings ( 12 . 13 ) on the engine ( 20 ) or on the pump ( 30 ) is circumferentially sealed. Pump sealing device ( 1 ) according to one of the preceding claims, wherein at least one of the couplings ( 12 . 13 ) is a static coupling with static without relative movement relative to each other arranged sealing surfaces. Pump sealing device ( 1 ) according to one of the preceding claims, wherein the collecting reservoir ( 10 ) an access ( 17 ) at least for the pump-side shaft seal ( 72 ; 40 ) having. Pump sealing device ( 1 ) according to any one of the preceding claims, wherein an underside ( 14.1 ) of the collection reservoir ( 10 ) at least in sections a gradient and / or a connection ( 16 ) of the collection reservoir ( 10 ) leading outlet ( 16.2 ), and / or wherein on an inner circumferential surface ( 14.2 ) of the collection reservoir ( 10 ) a bulkhead ( 11 ), in particular baffle plate arranged and fluid-tight with the inner circumferential surface ( 14.2 ) connected is. Pump sealing device ( 1 ) according to any one of the preceding claims, wherein the pump sealing device ( 1 ), in particular the collecting reservoir ( 10 ) at least one connection to ( 15 ) an emission control system ( 50 ) having. Pump sealing device ( 1 ) according to any one of the preceding claims, wherein the pump sealing device ( 1 ), in particular the collecting reservoir ( 10 ) a connection ( 16 ) to a slop system ( 60 ) having. Pump sealing device ( 1 ) according to one of the preceding claims, wherein the collecting reservoir ( 10 ) comprises a tube or is tubular, or wherein an outer contour or lateral surface ( 14 ) of the collection reservoir ( 10 ) is at least partially formed by a tube. Pump sealing device ( 1 ) according to one of the preceding claims, wherein the pump-side shaft seal comprises at least one compressible seal, in particular a stuffing box ( 40 ). Pump sealing device ( 1 ) according to the preceding claim, wherein the pump-side shaft seal ( 40 ) on an outside of the pump ( 30 ) and axially biased in the direction of the shaft. Pump sealing system ( 100 ) with a pump sealing device ( 1 ) according to any one of the preceding claims, comprising: a motor ( 20 ); a pump ( 30 ); at least one motor and pump coupling shaft ( 3 . 5 ), which is sealed to the pump, characterized in that the engine ( 20 ) a fluid-tight with a coupling part ( 12.1 ) of the collection reservoir ( 10 ) of the pump sealing device ( 1 ) cooperating coupling part ( 22.1 ), and that the pump ( 30 ) a fluid-tight with a coupling part ( 13.1 ) of the collection reservoir ( 10 ) cooperating coupling part ( 33.1 ), wherein the collecting reservoir ( 10 ) in the coupled state, one / the pump-side shaft seal ( 40 ) surrounding the internal volume (V) of the environment (U) fluid-tight. Pump sealing system ( 100 ) according to the preceding claim, wherein the pump sealing system, in particular the collecting reservoir ( 10 ) fluid-tight to an emission control system ( 50 ) is coupled. Pump sealing system ( 100 ) according to one of the preceding claims, wherein the pump sealing system, in particular the collecting reservoir ( 10 ) fluid-tight to a slop system ( 60 ) is coupled. Use of a stuffing box ( 40 ) as a shaft seal on a pump ( 30 ), in particular in a pump sealing device ( 1 ) according to one of the preceding claims, wherein the stuffing box ( 40 ) in a fluid-tight manner from the environment (U) enclosed internal volume (V) is enclosed in a fluid-tight manner, in particular at one to a motor ( 20 ) leading wave. Use of a pump ( 30 ) with stuffing box ( 40 ) as a shaft seal in a device for sealing pumps in a coking plant, in particular in a pump sealing device ( 1 ) according to one of the preceding claims, wherein the stuffing box ( 40 ) by means of a / the to the pump coupled, in particular flanged collection reservoir ( 10 ) is separated fluid-tight from the environment (U), which fluid-tight with a slop system ( 60 ) connected is.

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