DE10220322C1 - Gas distributor used in the recovery of hydrogen from gases by pressure swing adsorption, comprises adsorbers connected to a central shaft via gas lines - Google Patents

Abstract

Gas distributor comprises adsorbers (12-16) connected to a central shaft (28) via gas lines (2-6, 7-11). The central shaft has locking units (25-27). Delivery pipes are located in distributor housings (20, 21) having detachable lids (41, 42). One distributor housing (20) is connected to a crude gas supply and the other (21) is permanently impinged with a product gas. Gas distributor comprises adsorbers (12-16) connected to a central shaft (28) via gas lines (2-6, 7-11). The central shaft has locking units (25-27). Delivery pipes are located in distributor housings (20, 21) having detachable lids (41, 42). One distributor housing (20) is connected to a crude gas supply and the other (21) is permanently impinged with a product gas. Connections of the gas lines leading to the adsorbers are assigned to the housing lids on the inner side and are connected via a coupling line or directly to the crude gas line (17), the product line (18), the residual gas line (19) or a further adsorber.

Description

The invention relates to a gas distributor for use in the extraction of Hydrogen from gases containing hydrogen by means of pressure swing adsorb tion.

Such a gas distributor is part of EP 0 115 335 A2 Technology. It is used to supply raw gas to an adsorber, for transfer of hydrogen from this adsorber into a product line, to fill one Adsorbers with product gas, to carry out a pressure equalization between two adsorbers, for purging an adsorber and for removing residual gas. For this purpose, the gas distributor is connected to four adsorbers via gas lines.

In order to be able to carry out the various cycle steps of the adsorbers, the known gas distributor has within a horizontally divided housing a split central shaft, with each longitudinal section of the central shaft with a grooved distributor disc is rotatably connected. The distributor disks  are also against ge by springs, balls and bellows nutete plates pressed inside the housing at a distance from each other are fixed. The fixed plates are on the sides facing each other Provide connections with the adsorbers via the gas lines a raw gas supply line, a product line and a residual gas line that are.

Due to the overall structure of the gas distributor, it is not only necessary Central shaft, but also to share the housing. This is a very accurate one Machining of all parts to be adapted to each other, which are then at Assembly must be precisely connected and adjusted. The ferti engineering and assembly costs are high.

Furthermore, due to the large radial extension of the distributor disks and Plates with the groove arrangements provided therein that the Space for the connections to the adsorbers is necessarily generous have to be.

The wear caused by the different pressure means Large distribution disks and plates lying on top of each other are high. with A corresponding maintenance effort cannot be avoided. Also are Monitoring channels provided between the individual groove arrangements through which a leak can be determined. This will make the Effort increased even further.

By driving the central shaft via a single motor, a ver equally complex control with corresponding cycle times necessary. Because the distributor disks and plates are pressed together and for this A high contact pressure is required, the cycle times are inevitable be generously dimensioned to accommodate the various cycle steps of the adsorbers to be able to create.

The object of the invention is based on the prior art based on a gas distributor for use in the production of hydrogen from hydrogen-containing gases by means of pressure swing adsorption create, which is constructed more simply, shorter cycles of the various Beaufschla conditions of the adsorber and requires less maintenance.

This object is achieved with the features specified in claim 1 solved.

By including now five instead of the usual four ad sorber in the recovery cycle, the yield of hydrogen can increase by about 6% be increased. Furthermore, due to the targeted flow control in the Inside the junction box ensured that the number of Pro steps per adsorber and thus the number of couplings between the adsorbers can be maintained to withstand the mechanical stress of the To keep sealing materials in the gas distributor low. The use of min at least five adsorbers also leads to lower concentration and Pressure fluctuations in the residual gas of the pressure swing adsorption process (DWA process), which offers advantages in applications in which one Further processing of the residual gas is provided, for example for Burner underfiring in steam reforming plants. In addition, the mechanical stress on the materials due to lower pressure fluctuations reduced in the gas distributor.

The invention allows fast switching operations to reduce the cycle times Ren. Shorter cycle times lead to greater productivity and thus to more compact adsorbers. This is achieved by the central shaft in their middle length section under the influence of three regardless of mutually axially effective, with their longitudinal axes tangential to the central shaft aligned and coupled with a control and locking units drives stands. Such a discontinuous drive with additional me Chanian path limitation leads to extreme switching precision and extreme  short switching operations. This prevents a possible loss of effectiveness of the DWA process due to long overlap times. The control effort is reduced by the subdivision into three individual drives arranged in parallel ed.

By assigning itself to the distributor disks resiliently as well as sliding and tightly supporting individual transfer sleeves to the connections to the gas lines leading to the adsorbers become a very long service life achieved with negligible gas leakage. That is also a Guaranteed use in the production of volatile hydrogen.

The supply and discharge of the various gases is always frontal of the gas distributor. This is a significant reduction in radial Extension connected. The gas distributor can be mounted vertically or horizontally be ordered.

The arrangement and design of the transfer device is also important gen. The transfer provided at one end in a distributor housing direction also with a rotationally fixed to the central shaft and with three coupling lines equipped distribution disc controls the supply of the Raw gas in the adsorber and the removal of the residual gas from the adsorber Bern. The one in the gas distributor at the other end in a distributor housing The provided transfer device also has one with the central shaft non-rotatably connected distributor disc equipped with five coupling lines, which removes the product gas from an adsorber, the pressure immediately between two adsorbers, the purge gas flow between two adsorbers and allows each adsorber to be filled with product gas.

The integration of three actuators and three associated with the actuators Neten locks is due to the arrangement of five adsorbers, where divided by the process steps into three individual steps that are suitable for then repeat all five adsorbers accordingly. A complete cycle over all five adsorbers therefore comprise fifteen individual steps.  

A higher number of adsorbers only requires a corresponding type number of transfer sleeves and coupling lines.

The actuators for gradually rotating the central shaft and thus the Distribution disks are preferably pneumatically actuated according to claim 2 beat. This measure is favorable in terms of control technology and is only low feasible according to installation effort. Commercially available axially acting same piston-cylinder devices are used.

Also the locking units, which the respective positioning of the central shaft and ensure the distributor disks are in particular according to claim 3 formed especially by pneumatically actuated locks. in this connection can also be axially effective piston-cylinder devices in trade standard construction.

If according to claim 4, the actuators and the locking units with between the bolts arranged on the central shaft interact, this leads to a simple construction. The disks are attached to the circumference of a support sleeve, which is fixed on the central shaft can be. Between the discs are parallel to the central shaft stretching bolts incorporated. Acting based on the fifteen cycle steps five adsorbers are fifteen bolts. The actuators then work tangential to the washers with the bolts together to the central shaft rotate through a certain angle while the latches are radial interact with the bolts to ensure the respective operating position put.

Also important within the scope of the invention is the special design of the Transfer sleeves according to claim 5. Although the transfer sleeves can also be guided directly on the housing cover, it is manufacturing, assembly and maintenance technically more appropriate if each transfer fixation sleeve on the one hand via a compression spring on a to the housing cover th insert bush supported and on the other hand via a sealing ring against one  Distribution disc is pressed. Here are the transfer sleeve and the Insert socket matched to one another so that it presses during operation are burdensome. Consequently, only the compression spring is decisive for the operator pressure of the transfer sleeve on the distributor disc. The one in this together The sealing ring used is preferably made of Po lytetrafluoroethylene (PTFE). The fact that only individual transfer sleeves on the distributor disks are pressed, there is significantly less wear expect as if a complete distributor disc is attached to a counter plate must be pressed.

According to claim 6, each insert bush is detachable on the housing cover attached and sealed against the housing cover. To do so the insert socket in particular on a threaded connector, which in a thread the bore of the housing cover is turned. The insert in a ring collar Socket is inserted adjacent to the housing cover, so that When screwing the insert bushing into the threaded bore, the seal on the Pressed housing cover and thus a perfect seal is achieved. Such an arrangement also allows each individual transfer sleeve and Replace insert socket individually so that the maintenance time is minimal. Long service lives are achieved. Despite the assignment of several transfer The sleeves for a distributor disc can reduce the kv values of the gas paths individually adjusted.

Precise guidance of the transfer sleeve on the insert bush is ge according to claim 7 achieved in that the transfer sleeve Insert sleeve overlaps and is sealingly guided on the insert sleeve. To the insert bushing has in particular two juxtaposed you on the inside of the transfer sleeve to the sealing system long.

According to the features of claim 8, each distributor is housing through a housing cover, a cylindrical jacket and through a  the supporting disc supporting the central shaft is limited. That way they can Distributor housing perfectly defined, easily manufactured and easy to assemble.

The support disks are distributed according to claim 9 by the circumference arranged spacers extending parallel to the central shaft other connected. Four spacer struts, in particular U-shaped, are preferred cross section.

Such distance struts then make it possible according to claim 10, both the actuators as well as the locking units on the spacer struts without any problems to be able to determine.

The frontal assignment of end plates to the housing covers of the distributor Lergehäuses according to claim 11 allows a separation of functions and also easier manufacture and assembly with regard to tight fastening of the various gas lines on the end plates.

If according to the features of claim 12, the distribution ge housing via centering disks connected to their coats with the supporting disks ben are screwed, the production can be simplified even further. After installing the distributor housing, only the centering is required disks to be screwed to the support disks to seal outwards To create junction boxes.

So that the residual gas and product gas discharge properly into the Cycle steps can be embedded, see the features of the patent Proposition 13 that the residual gas line and the product line with each in the distributor housings arranged and abge tight against this partitioned transition chambers connected to the distributor disks are that can be cyclically connected to the adsorbers via coupling lines.  

Preferably, according to claim 14, the transition chambers are pruned like extensions in the housing cover tightly guided.

To be able to fill each adsorber with product gas is according to claim 15 provided that the product line via a bypass line with the adjacent distributor housing is connected.

The invention is illustrated below with reference to the drawings Embodiments explained in more detail. Show it:

Figure 1 is a schematic plan view of a gas distributor which is connected to five adsorbers via gas lines.

FIG. 2 shows the gas distributor of FIG. 1 in a schematic side view in the coupling with an adsorber;

Fig. 3 the gas distributor of Figures 1 and 2 constructive in perspective view.

Fig. 4 is an end view of the gas distributor according to arrow IV of Fig. 3;

FIG. 5 shows an end view of the gas distributor according to arrow V in FIG. 3;

Seen Figure 6 is a vertical longitudinal section through the gas distributor taken along the line VI of Figure 3 in the direction of arrows VIa..;

FIG. 7 is seen a horizontal cross section through the representation of FIG. 6 along the line VII-VII in the direction of the arrows VIIa;

Fig. 8 in an enlarged view the detail VIII of Fig. 6 in a reverse view and

Seen 9 to 14 are views on the raw gas and the product gas side of the gas distributor into three operating situations, taken along lines AA and BB of Figure 6 in the direction of arrows A1 and B1..;

See Fig. 15 is a view of a distributor disc of the gas distributor in the direction of arrows A1 in Fig. 6 and

See Fig. 16 is a view of a further distributor disc of the gas distributor in the direction of arrows B1 of Fig. 6.

1 with 1 a gas distributor is shown in Figs. To 14 for use in the threaded voltage of hydrogen from hydrogen-containing gases by means of pressure referred seladsorption Wech. The gas distributor 1 is connected according to FIGS. 1 and 2 via gas lines 2-11 with five adsorbers 12-16 , which he allow to extract hydrogen from a hydrogen-rich raw gas. The pressure swing adsorption (DWA) used for this is generally known and need not be explained in more detail.

The gas distributor 1 is used for the cyclical supply of raw gas from a raw gas line 17 to an adsorber 12-16 , for transferring hydrogen from the sem adsorber 12-16 into a product line 18 , for filling an adsorber 12-16 with product gas, for carrying out a Pressure equalization between two adsorbers 12-16 , for purging an adsorber 12-16 and for removing residual gas via a residual gas line 19 .

For this purpose, the gas distributor 1 has two end-side distributor housings 20 , 21 (FIGS . 3 and 6) and between the distributor housings 20 , 21 vorgese hene pneumatically actuatable actuators 22 , 23 , 24 in the form of Kol ben-cylinder devices and pneumatically actuated locking units 25 , 26 , 27 also in the form of piston-cylinder devices.

From FIGS. 6 and 7 it can be seen that the gas distributor 1 wave central comprises 28 which slices through non-illustrated bearings 29 in two support is intercepted 30 which are interconnected by four spacer struts 31-34 of U-iron. Of these, the spacer struts 33 and 34 serve to fix the actuators 22-24 and the latching units 25-27 in place .

In the region between the support disks 30, the central shaft 28 is encompassed by a fixed supporting sleeve there 35th Four disks 36-39 arranged one above the other are fastened to the circumference of the support sleeve 35 . The disks 36 and 37 , 37 and 38 and 38 and 39 are each spaced apart by fifteen bolts 40, the circumferential relative position of the bolts 40 being coordinated with the work steps of the gas distributor 1 which will be explained in more detail below. The bolts 40 extend parallel to the central shaft 28 .

The support disks 30 serve to seal and center the distributor housings 20 and 21 . Each distributor housing 20 , 21 is formed by a housing cover 41 or 42 , a cylindrical jacket 43 or 44 and by a centering disk 45 or 46 , by means of which the distributor housing 20 , 21 are screwed tightly to the support disks 30 .

In the distributor housings 20 , 21 (see FIGS. 6, 15 and 16) 28 distributor disks 49 , 50 are fastened on the longitudinal sections 47 , 48 of the central shaft located here. The distributor disks 49 , 50 serve in the manner explained in more detail below for the transfer of raw gas from the raw gas line 17 into the adsorbers 12-16 , the removal of residual gas from the adsorbers 12-16 into the residual gas line 19 , and the removal of product gas from the adsorbers 12 -16 into the product line 18 , the pressure-equalizing connection between two adsorbers 12-16 with transfer of hydrogen-rich gas and for filling an adsorber 12-16 with product gas from the product gas line 18 .

End face of the housing cover 41 , 42 with the housing covers 41 , 42 ver screwed end plates 51 , 52 are provided. The housing cover 41 and the end plate 51 have corresponding through openings 53 , 54 . The through openings 53 , 54 serve as connections for the raw gas line 17 and the gas lines 2-6 to the adsorbers 12-16 , while a through opening 55 in the end plate 51 serves as a connection for the residual gas line 19 .

The housing cover 42 and the end plate 52 are provided with through openings 56 , 57 , which serve as connections for the gas lines 7-11 to the adsorbers 12-16 and for connecting a bypass line 58 , which on the other hand is connected to the product line 18 . A through opening 59 in the end plate 52 serves to connect the product line 18th

In the distributor housing 20 between the distributor plate 49 and the Ge housing cover 41 a tightly sealed off from the distributor housing 20 transition chamber 60 is provided. This transition chamber 60 has a nozzle 61 which is tightly guided in the housing cover 41 and is connected to the gas opening 19 leading through opening 55 .

On the side facing the support disk 30 , the distributor disk 49 has three U-shaped coupling lines 62 , 63 , 64 , which can be seen in FIGS. 6, 9, 11, 13 and 15 and are connected to corresponding openings in the distributor disk 49 . These coupling lines 62-64 serve to connect the transfer chamber 60 to the adsorbers 12-16 .

Insert bushings 65, which can be seen in more detail in FIG. 8, are screwed into the interior of the distributor housing 20 into the through openings 54 of the housing cover 41 connected to the adsorbers 12-16 . For this purpose, each insert bush 65 is provided with a threaded connector 66 . An annular collar 67 with a sealing ring 68 is located on the inside of the housing cover 41 . The insert bushing 65 also has a sealing socket 69 with two sealing rings 70 embedded on the circumferential side in grooves. The sealing rings 70 lie on a sealing sleeve zen 69 crossover sleeve 71 sealing. The transfer sleeve 71 is pressed by a compression spring 72 in the form of a helical compression spring on the side of the distributor plate 49 facing the housing cover 41 . The compression spring 72 extends between the radial collar 67 of the insert bush 65 and a radial collar 73 of the transfer sleeve 71 . On the other side of the radial collar 73 of the transfer sleeve 71 there is a sealing ring 74 which is pressed against the side of the distributor disk 49 facing the housing cover 41 . The sealing ring 74 is fixed by a hedging washer 75 . Corresponding through bores 76 for gas-conducting connection are located in the insert bushing 65 and in the transfer sleeve 71 .

Further, FIG. 8, that the circumference of the through holes 54 in the housing cover 41 and in the end plate 51 cover at the transition from housing 41 on the end plate 51, a further sealing ring 77 plate into a groove of the end 51 is embedded, on the housing lid 41 comes to the plant.

The parts 65-77 described above are briefly referred to below with valve arrangement VA.

Also, the distributor housing 21 delimiting housing cover 42 carries accordingly the illustration of FIG. 8 valve assemblies VA, the transfer sleeves 71 are pressed onto the distributor plate 50 . The distributor plate 50 is provided on the side facing the support plate 30 with five U-shaped configuration lines 78-82 , which are connected to through openings in the distributor plate 50 ( FIGS. 6, 10, 12, 14 and 16).

Between the distributor plate 50 and the housing cover 42 is a pre-sealed against the distributor housing 21 sealed transition chamber 83 . The transition chamber 83 fits tightly with a nozzle 84 in the Ge housing cover 42nd The connector 84 is connected to the through opening 59 in the end plate 52, which is connected to the product line 18 .

The hydrogen production process is explained below, which for each adsorber 12-16 consists of three individual steps which can be controlled via the gas distributor 1 . These three individual steps are repeated for each adsorber 12-16 . Thus, a complete cycle for all five adsorbers 12-16 consists of a total of fifteen individual steps.

First, with the aid of a control (not shown in more detail) via the actuator 22, the central shaft 28 is rotated according to the arrows PF in such a way that the relative positions of the distributor disks 49 , 50 that can be seen in FIGS. 9 and 10 to the through openings 53 , 54 , 56 , 57 in the housing covers 41 , 42 and end plates 51 , 52 can be fixed with the aid of the latching unit 25 .

In this position of the distributor disks 49 , 50 , the raw gas line 17 is connected directly to the distributor housing 20 . Furthermore, FIG. 9 shows on the basis of the hatched circular area that the distributor housing 20 is connected to the adsorber 12 via the distributor disk 49 , a valve arrangement VA and the gas line 2 . Raw gas is consequently passed directly from the raw gas line 17 into the adsorber 12 . Impurities such as CO, CO ₂ , CH ₄ and N _{2 are} adsorbed in this. Hydrogen then leaves the adsorber 12 and arrives according to FIGS. 6 and 10 via the gas line 7 , via a valve arrangement VA, the distributor plate 50 and the coupling line 78 into the transfer chamber 83 . From the transfer chamber 83 , the hydrogen exits via the connector 84 and the passage opening 59 into the product line 18 .

In this first individual step, pressure equalization between the adsorber 13 and the adsorber 16 is also carried out. In this regard, it can be seen from FIG. 10 due to the hatched circular areas that the adsorbers 13 and 16 are connected in a gas-conducting manner via the distributor housing 21 . That is, hydrogen-rich gas from the adsorber 16 is fed into the distributor housing 21 , from where it then reaches the adsorber 13 . At the same time, the adsorber 13 is filled. That is, product hydrogen is transferred from the product line 18 via the bypass line 58 into the distributor housing 21 and then also enters the adsorber 13 .

FIGS. 6 and 9 show, in this context, that contaminated residual gas from the adsorber 15 via a valve arrangement VA, the distribution disc 49, passes via the coupling line 62 in the transfer chamber 60 and from this through the pipe 61 to the residual gas line 19.

Subsequently, with the aid of the actuator 23, the central shaft 28 is rotated by 24 ° according to the arrows PF1 and fixed by the latching unit 26 ( FIGS. 11 and 12).

In this position of the distributor disks 49 , 50 , in turn ( FIG. 11), raw gas from the raw gas line 17 enters the distributor housing 20 and from the distributor housing 20 via the distributor disk 49 , a valve arrangement VA and the gas line 2 into the adsorber 12 . According to the first individual step, the impurities in the adsorber 12 are then adsorbed again and hydrogen leaves the adsorber 12 via the gas line 7 , enters via a valve arrangement VA, the distributor disk 50 and the coupling line 79 into the transfer chamber 83 and leaves this via the Port 84 and the passage opening 59 in the product line 18 ( Fig. 6 and 12).

The pressure equalization is now carried out between the adsorbers 16 and 14 ( Fig. 12). Then hydrogen-rich gas is transferred from the adsorber 16 via the gas line 11 , a valve arrangement VA, the distributor plate 50 and the coupling line 81 into the adsorber 14 (hatched elongated area). In parallel, the adsorber 13 is filled ( Fig. 12, hatched circular representation). That is, hydrogen from the product line 18 is fed via the bypass line 58 and the distributor housing 21 into the gas line 8 to the adsorber 13 .

Furthermore ( Fig. 6 and 11) contaminated residual gas from the adsorber 15 via the gas line 5 , a valve assembly VA, the distributor plate 49 and the coupling line 63 into the transition chamber 60 (hatched elongated area), from which the residual gas then through the nozzle 61 and the passage opening 55 reaches the residual gas line 19 .

The third individual step in the course of the adsorption by the adsorber 12 is explained below with reference to FIGS. 13 and 14.

In this third individual step, the central shaft 28 is first rotated a further 24 ° according to the arrow PF2 with the help of the third actuator 24 and fixed with the aid of the latching unit 27 . FIG. 13 shows that the crude gas from the crude gas line 17 reaches into the distributor housing 20 and out of the Verteilerge housing 20 via the gas pipe 2 into the adsorber 12 (hatched circular area). In the adsorber 12 , the impurities CO, CO ₂ , CH ₄ and N _{2 are} adsorbed and hydrogen leaves the adsorber 12 according to FIGS. 6 and 14 via the gas line 7 and passes through a valve arrangement VA, the distributor plate 50 , the coupling line 80 (hatched elongated area), the transfer chamber 83 , the nozzle 84 and the through opening 59 into the product line 18 from.

The adsorber 15 is now rinsed ( Fig. 14). For this purpose, hydrogen-rich purge gas is transferred from the adsorber 16 via the gas line 11 , a valve arrangement VA, the distributor plate 50 and the coupling line 82 into the gas line 10 , from which it passes into the adsorber 15 (hatched elongated area).

At the same time, contaminated residual gas ( FIGS. 6 and 13) is guided out of the adsorber 15 via the gas line 5 , a valve arrangement VA, the distributor disk 49 and the coupling line 64 into the transfer chamber 60 (hatched elongated area), from which it passes through the connection piece 61 and the passage opening 55 passes into the residual gas line 19 .

In parallel, the adsorber 13 is filled ( Fig. 14). This means that product water is transferred from the product line 18 via the bypass line 58 into the distributor housing 21 , from where it then reaches the adsorber 13 via the gas line 8 .

The then subsequent individual step four corresponds to individual step 1 with reference to FIGS. 9 and 10, the roles of the adsorbers being changed to who. The adsorber 13 now receives raw gas and releases product gas, whereas the pressure equalization is carried out between the adsorbers 12 and 14 and the adsorber 15 releases residual gas.

This next single step is in turn carried out by activating the actuator 22 , with a further adjustment of the central shaft 28 by 24 °.

The further individual steps are then carried out analogously to the preceding explanations steps two and three.  

REFERENCE NUMBERS

1

gas distributor

2

Gas line between

1

u.

12

3

Gas line between

1

u.

13

4

Gas line between

1

u.

14

5

Gas line between

1

u.

15

6

Gas line between

1

u.

16

7

Gas line between

12

u.

1

8th

Gas line between

13

u.

1

9

Gas line between

14

u.

1

10

Gas line between

15

u.

1

11

Gas line between

16

u.

1

12

adsorber

13

adsorber

14

adsorber

15

adsorber

16

adsorber

17

raw gas

18

product line

19

Residual gas line

20

distributor housing

21

distributor housing

22

actuator

23

actuator

24

actuator

25

catch unit

26

catch unit

27

catch unit

28

Central shaft v.

1

29

Bearings f.

28

30

supporting discs

31

Distance strut between

30

32

Distance strut between

30

33

Distance strut between

30

34

Distance strut between

30

35

Carrying sleeve around

28

36

Disc on

35

37

Disc on

35

38

Disc on

35

39

Disc on

35

40

Bolt between

36-39

41

Housing cover v.

20

42

Housing cover v.

21

43

Coat of

20

44

Coat of

21

45

Centering disc v.

20

46

Centering disc v.

21

47

Longitudinal section v.

28

48

Longitudinal section v.

28

49

Distributor disc in

20

50

Distributor disc in

21

51

End plate

41

52

End plate

42

53

Through openings in

41

.

51

54

Through openings in

41

.

51

55

Through openings in

51

56

Through openings in

42

.

52

57

Through openings in

42

.

52

58

bypass line

59

Through opening in

52

60

Transition chamber in

20

61

Socks

60

62

Coupling line

49

63

Coupling line

49

64

Coupling line

49

65

insert bushings

66

Threaded connector v.

65

67

Ring collar v.

65

68

Sealing ring in

67

69

Sealing nozzle v.

65

70

Sealing rings

69

71

Transfer sleeve

72

compression spring

73

Radial collar v.

71

74

Sealing ring

73

75

Lock washer f.

74

76

Through holes in

65

.

71

77

seal

78

Coupling line

50

79

Coupling line

50

80

Coupling line

50

81

Coupling line

50

82

Coupling line

50

83

Transition chamber in

21

84

Socks

83

PF arrows
PF1 arrows
PF2 arrows
VA valve arrangement

Claims (15)

1. Gas distributor for use in the production of hydrogen from hydrogen-containing gases by means of pressure swing adsorption, characterized by the following features:

• - At least five adsorbers ( 12-16 ) are arranged via gas lines ( 2-6 ; 7-11 ) with circumferential sides of a central shaft ( 28 ), gradually switchable, encapsulated transfer devices to the environment for the cyclical supply of raw gas to an adsorber ( 12- 16 ), transfer of hydrogen from this adsorber ( 12-16 ) into a product line ( 18 ), filling an adsorber ( 12-16 ) with product gas, carrying out pressure equalization between two adsorbers ( 12-16 ), purging an adsorber ( 12 -16 ) and discharge of residual gas connected;
• - The central shaft ( 28 ) is in its central longitudinal section under the influence of three independently axially effective, with their longitudinal axes to the central shaft ( 28 ) aligned tangentially and with a control and locking units ( 25-27 ) coupled actuators ben;
• - Each transfer device has, in a distributor housing ( 20 , 21 ) with a detachably assigned housing cover ( 41 , 42 ), a distributor disc ( 49 , 50 ) which is connected to the central shaft ( 28 ) in a rotationally fixed manner and is equipped with coupling lines (62-64; 78-82) );
• - A distributor housing ( 20 ) is constantly connected to the raw gas supply and the other distributor housing ( 21 ) is permanently pressurized with product gas;
• - The connections ( 54 , 56 ) provided on the housing covers ( 41 , 42 ) of the gas lines ( 2-6 ; 7-11 ) leading to the adsorbers ( 12-16 ) are fixed on the inside of the housing cover ( 41 , 42 ) the distributor disks ( 49 , 50 ) are assigned resiliently flexible and sliding and tightly supporting individual transfer sleeves ( 71 );
• - The connections ( 54 , 56 ) are depending on the respective cycle step directly or via a coupling line ( 62-64 ; 78-82 ) with the raw gas line ( 17 ), the product line ( 18 ), the residual gas line ( 19 ) or another gas adsorber ( 12-16 ).

2. Gas distributor according to claim 1, in which the actuators ( 22-24 ) are acted upon pneumatically. 3. Gas distributor according to claim 1 or 2, in which the latching units ( 25-27 ) are formed by pneumatically actuated locks. 4. Gas distributor according to one of the claims 1 to 3, in which the actuators ( 22-24 ) and the latching units ( 25-27 ) interact with bolts ( 40 ) arranged between disks ( 36-39 ) fastened on the central shaft ( 28 ). 5. Gas distributor according to one of the claims 1 to 4, in which each transfer sleeve ( 71 ) is supported on the one hand via a compression spring ( 72 ) on an insert sleeve ( 65 ) fixed to the housing cover ( 41 , 42 ) and on the other hand via a sealing ring ( 74 ) a distributor disc ( 49 , 50 ) is pressed ge. 6. The gas distributor of claim 5, wherein each socket insert (65) releasably secured to the housing cover (41, 42) attached and relative to the housing lid (41, 42) is sealed. 7. Gas distributor according to claim 5 or 6, in which the transfer sleeve ( 71 ) overlaps the insert bushing ( 65 ) and is sealingly guided on the insert bushing ( 65 ). 8. Gas distributor according to one of claims 1 to 7, in which each distributor housing ( 20 , 21 ) by a housing cover ( 41 , 42 ), a zy-cylindrical jacket ( 43 , 44 ) and by a central shaft ( 28 ) supporting disc ( 30 ) is limited. 9. Gas distributor according to claim 8, in which the support disks ( 30 ) are connected to one another by circumferentially distributed spacers ( 31-34 ) extending parallel to the central shaft ( 28 ). 10. Gas distributor according to claim 9, in which the actuators ( 22-24 ) and the latching units ( 25-27 ) are attached to the spacer struts ( 33 , 34 ). 11. Gas distributor according to one of claims 1 to 10, in which the housing cover ( 41 , 42 ) are screwed to end plates ( 51 , 52 ) which have coaxially extending through openings ( 53 , 54 , 56 , 57 ). 12. Gas distributor according to one of the claims 8 to 11, in which the distributor housings ( 20 , 21 ) are screwed to the support discs ( 30 ) via centering discs ( 45 , 46 ) connected to their shells ( 43 , 44 ). 13. Gas distributor according to one of the claims 1 to 12, in which the residual gas line ( 19 ) and the product line ( 18 ) are arranged in the distributor housings ( 20 , 21 ) and are sealed off from them, rotating with the distributor disks ( 49 , 50 ) Transition chambers ( 60 , 83 ) are connected, which can be connected cyclically to the adsorbers ( 12-16 ) via coupling lines ( 62-64 ; 78-80 ). 14. Gas distributor according to claim 13, in which the transition chambers ( 60 , 83 ) are guided tightly by means of nozzle-like extensions ( 61 , 84 ) in the housing covers ( 41 , 42 ). 15. Gas distributor according to one of claims 1 to 14, in which the product line ( 18 ) via a bypass line ( 58 ) is connected to the adjacent distributor housing ( 21 ).