INSTALLATION FOR THE THERMAL TREATMENT OF DISPERSIBLE RAW MATERIAL, AND METHOD FOR OPERATING SUCH AN INSTALLATION

Abstract

An installation for thermal treatment of free-floating raw material, in particular cement raw meal and/or mineral products, may include a riser line through which hot gases can flow. The riser line has at least one fuel inlet for introducing fuel into the riser line. The riser line has at least one raw meal inlet for introducing raw meal into the riser line, which raw meal inlet is arranged upstream of the fuel inlet in a flow direction of gas inside the riser line. Further, a method for thermal treatment of free-floating raw material may involve introducing fuel via a fuel inlet into a riser line for guiding hot gases and introducing raw meal into the riser line. The raw meal is introduced into the riser line upstream of the fuel inlet in the flow direction.

Claims

1.-16. (canceled)

17. An installation for thermal treatment of free-floating raw material including at least one of cement raw meal or mineral products, the installation comprising a riser line through which hot gases can flow, wherein the riser line includes: a fuel inlet for introducing fuel into the riser line; a raw meal inlet for introducing raw meal into the riser line, the raw meal inlet being arranged upstream of the fuel inlet in a flow direction of gas inside the riser line; and an inert gas inlet connected to an inert gas source for introducing inert gas into the riser line.

18. The installation of claim 17 wherein the riser line includes at least two treatment regions arranged in succession in the flow direction, each of the at least two treatment regions having a different diameter, wherein an upstream treatment region of the at least two treatment regions includes the raw meal inlet for introducing the raw meal into the upstream treatment region of the riser line.

19. The installation of claim 18 wherein the riser line includes a cross-sectional constriction between the at least two treatment regions, the cross-sectional constriction having a smaller diameter than either of the at least two treatment regions.

20. The installation of claim 18 wherein the fuel inlet is arranged downstream of the upstream treatment region.

21. The installation of claim 18 wherein the riser line includes a first cross-sectional constriction between the at least two treatment regions, the first cross-sectional constriction having a smaller diameter than either of the at least two treatment regions, wherein the fuel inlet is arranged downstream of the upstream treatment region, wherein the riser line includes a second cross-sectional construction that is upstream of the upstream treatment region.

22. The installation of claim 18 wherein the raw meal inlet is a first raw meal inlet, wherein the riser line includes a second raw meal inlet for introducing raw meal into the riser line, wherein each of the first and second raw meal inlets is arranged in a different one of the at least two treatment regions.

23. The installation of claim 17 wherein the fuel inlet includes fuel lines that extend in radial directions of the riser line, the fuel lines extending through a wall of the riser line into the riser line, wherein the raw meal inlet includes raw meal lines that extend in radial directions of the riser line, the raw meal lines extending through the wall of the riser line into the riser line.

24. The installation of claim 17 wherein the fuel inlet includes a fuel line that extends in a radial direction of the riser line, the fuel line extending through a wall of the riser line into the riser line, wherein the raw meal inlet includes a raw meal line that extends in a radial direction of the riser line, the raw meal line extending through the wall of the riser line into the riser line.

25. The installation of claim 24 wherein the fuel line extends at an angle of 0° to ±50° relative to the raw meal line into the riser line.

26. The installation of claim 17 comprising: a temperature measuring unit that is disposed in the riser line and is configured to ascertain a temperature inside the riser line; and a regulating unit that is connected to the temperature measuring unit to transmit the temperature that is ascertained, wherein the regulating unit is configured to regulate an amount of at least one of raw meal, inert gas, or fuel into the riser line based on the temperature that is ascertained.

27. A method for thermal treatment of free-floating raw material including at least one of cement raw meal or mineral products, the method comprising: introducing fuel via a fuel inlet into a riser line for guiding hot gases; introducing raw meal into the riser line, wherein the raw meal is introduced into the riser line upstream of the fuel inlet in a flow direction of gas; and introducing inert gas into the riser line.

28. The method of claim 27 wherein the riser line includes at least two treatment regions that are arranged in succession in the flow direction, wherein each of the at least two treatment regions has a different diameter, wherein the raw meal is introduced into an upstream treatment region of the at least two treatment regions in the flow direction.

29. The method of claim 27 comprising: ascertaining a temperature with a temperature measuring unit inside the riser line; and regulating an amount of at least one of raw meal, inert gas, or fuel in the riser line based on the temperature that is ascertained.

30. The method of claim 27 wherein the fuel inlet is an upstream fuel inlet, wherein fuel is introduced into the riser line via the upstream fuel inlet and a downstream fuel inlet, with the upstream and downstream fuel inlets being arranged in succession in the flow direction, wherein more fuel is introduced at the upstream fuel inlet than at the downstream fuel inlet.

31. The method of claim 28 wherein an amount of raw meal that is introduced into the upstream treatment region corresponds to 20% to 60% of a total amount of raw meal introduced into the riser line.

Description

DESCRIPTION OF THE DRAWINGS

[0053] The invention is explained in more detail hereinafter on the basis of several exemplary embodiments with reference to the appended figures.

[0054] FIG. 1 shows a schematic illustration of an installation for thermal treatment of raw material according to one exemplary embodiment.

[0055] FIG. 2 shows a schematic illustration of a cement production plant having an installation for thermal treatment according to FIG. 1 or 3.

[0056] FIG. 3 shows a schematic illustration of an installation for thermal treatment of raw material according to another exemplary embodiment.

[0057] FIG. 4 shows a schematic illustration of a detail of an installation for thermal treatment according to FIG. 3 according to a further exemplary embodiment.

[0058] FIG. 1 shows an installation 14 for thermal treatment of free-floating raw material, in particular cement raw meal and/or mineral products. Such an installation 14 is in particular a calcinator, which is used, for example, in a cement production plant for calcinating the preheated raw meal. The raw meal is preferably cement raw meal, mineral material, for example, limestone, ores, or clay. The raw meal is preferably a mixture of limestone or limestone marl and clay, which is supplemented if needed with iron ore, sand, or further materials or carbonate-containing materials such as limestone, dolomite, or mixtures containing them.

[0059] The installation 14 comprises a riser line 62, through which hot gases can preferably flow from bottom to top. The riser line 62 extends, for example, in the vertical direction and has, in particular at its lower region, an inlet for introducing hot gases, for example, exhaust gases of a combustion unit, such as a rotary kiln of a cement production plant. The flow direction of the hot gas within the riser line 62 is shown by the arrows at the bottom and top end of the riser line 62.

[0060] The riser line 62 has a plurality of different diameters. For example, the riser line 62 has two treatment regions 32, 33 arranged in succession in the flow direction of the gas. The first, front treatment region 32 is arranged in the flow direction in front of the second treatment region 33, wherein the diameter of the first treatment region 32 is, for example, less than that of the second treatment region 33. For example, a section of the riser line 62 having a larger diameter than the second treatment region 33 adjoins the second treatment region 33. Each treatment region has, for example, an essentially constant diameter. Between the two treatment regions 32, 33, the riser line 62 has a cross-sectional constriction 40, in particular a region having a smaller diameter than the treatment regions 32, 33 adjoining thereon. For example, the treatment regions 32, 33 each have a section having an essentially constant diameter and a section adjoining thereon having a changing diameter, for example decreasing or increasing. Upstream of the first treatment region 32, the riser line 62 has a further cross-sectional constriction 42, on which the first treatment region 32 of the riser line 62 adjoins, preferably directly. The diameter of the cross-sectional constriction 42 corresponds by way of example to the diameter of the cross-sectional constriction 40 arranged between the two treatment regions 32, 33. Each treatment region 32, 33 has in particular at least one inlet for introducing raw meal, fuel, or inert gas.

[0061] At the lower end of the riser line 62, for example at the cross-sectional constriction 42, for example, a furnace intake of a rotary kiln of a cement production plant adjoins, wherein the furnace exhaust gas is conducted through the furnace intake to the riser line. It is also conceivable that the lower end of the riser line 62 is connected to the exhaust gas line of an installation for burning lime.

[0062] The installation 14 has a first raw meal inlet 44, which is attached in the first treatment region 32 of the riser line 62. The raw meal inlet 44 preferably has at least one or a plurality of raw meal lines, which extend in the radial direction of the riser line and are arranged, for example, circumferentially around the riser line at one height level. The raw meal lines preferably each extend through the wall of the riser line 62 into the first treatment region 32. The first raw meal inlet 44 is arranged, for example, in the vertical direction centrally in the first treatment region 32. The installation 14 has a second raw meal inlet 46 which is designed, for example, identically to the first raw meal inlet 44 and is arranged, preferably centrally, in the second treatment region 33.

[0063] The installation 14 has, for example, two fuel inlets 48, 50, which are both arranged in the second treatment region 33. The fuel inlets 48, 50 each have, for example, at least one or a plurality of fuel lines, which extend in the radial direction of the riser line 62 and are arranged, for example, circumferentially around the riser line 62 at one height level. The fuel lines preferably each extend through the wall of the riser line 62 into the second treatment region 33. The fuel inlets 48, 50 are arranged in succession in the flow direction of the gas in the second treatment region 33 at different height levels of the riser line 62. For example, the first fuel inlet 48 is arranged in a lower region, in particular inlet region, and the second fuel inlet 50 is arranged in an upper region, in particular outlet region, of the second treatment region 33. The first fuel inlet 48 is arranged, for example, upstream of the second raw meal inlet 46 and the second fuel inlet 50 is arranged, for example, downstream of the second raw meal inlet 46.

[0064] The installation 14 has, for example, two inert gas inlets 52, 54, which each open into the second treatment region 32. The first inert gas inlet 52 is arranged, for example, upstream of the second raw meal inlet 46 and the second inert gas inlet 54 is arranged, for example, downstream of the second raw meal inlet 46.

[0065] The installation 14 furthermore has two temperature measuring units 56, 58, which are both attached inside the second treatment region 33. For example, the temperature measuring units 56, 58 are each associated with one fuel inlet 48, 50 and are arranged downstream, preferably directly at the fuel inlet 48, 50 or in the immediate surroundings. The first temperature measuring unit 56 is associated, for example, with the first fuel inlet 48 and the second temperature measuring unit 58 with the second fuel inlet 50.

[0066] The installation 14 furthermore has a regulating unit 60, which is connected to the temperature measuring units 58 to transmit the ascertained temperature. The regulating unit 60 is preferably connected to the first and the second raw meal inlet 44, 46 to regulate the amount of raw meal flowing through the respective raw meal inlet 44, 46 into the riser line 62. The regulating unit 60 is optionally connected to the fuel inlets 48, 50 and/or the inert gas inlets 52, 54 to regulate the amount of fuel and/or inert gas flowing through the respective fuel inlet 48, 50 and/or inert gas inlet 52, 54 into the riser line 62. The raw meal inlets 46, 48, the fuel inlets 48, 50, and/or the inert gas inlets 52, 52 have, for example, metering units, such as flaps or valves, via which the respective amount of raw meal, fuel, and inert gas can be adjusted. The metering units are preferably connected to the regulating unit.

[0067] The regulating unit 60 compares the ascertained temperature, preferably to a predetermined temperature limiting value or temperature limiting range. In particular, the regulating unit 60 is designed in such a way that it decreases or increases the amount of fuel in the riser line 62 if the ascertained temperature deviates from the temperature limiting value or temperature limiting range. If, for example, the temperature ascertained by means of one of the temperature measuring units 56, 58 exceeds the temperature limiting value or the temperature limiting range, the amount of fuel which flows through the fuel inlet 48, 50 associated with the respective temperature measuring unit 56, 58 into the second treatment region 33 is reduced. If, for example, the temperature ascertained by means of one of the temperature measuring units 56, 58 falls below the temperature limiting value or the temperature limiting range, the amount of fuel which flows through the fuel inlet 48, 50 associated with the respective temperature measuring unit 56, 58 into the second treatment region 33 is increased.

[0068] In particular, the regulating unit 60 is designed in such a way that it decreases or increases the amount of inert gas in the riser line 62 if the ascertained temperature deviates from the temperature limiting value or temperature limiting range. If, for example, the temperature ascertained by means of one of the temperature measuring units 56, 58 exceeds the temperature limiting value or the temperature limiting range, the amount of inert gas which flows through the inert gas inlet 52, 54 associated with the respective temperature measuring unit 56, 58 into the second treatment region 33 is reduced. If, for example, the temperature ascertained by means of one of the temperature measuring units 56, 58 falls below the temperature limiting value or the temperature limiting range, the amount of inert gas which flows through the inert gas inlet 52, 54 associated with the respective temperature measuring unit 56, 58 into the second treatment region 33 is increased. The inert gas inlet 52, 54 or fuel inlet 48, 50 associated with the respective temperature measuring unit 56, 58 is preferably the inert gas inlet 52, 64 and fuel inlet 48, 50 which is closest to the respective temperature measuring unit 56, 58.

[0069] In particular, the regulating unit 60 is designed in such a way that it decreases or increases the amount of raw meal in the riser line 62 if the ascertained temperature deviates from the temperature limiting value or temperature limiting range. If, for example, the temperature ascertained by means of one of the temperature measuring units 56, 58 exceeds the temperature limiting value or the temperature limiting range, the amount of raw meal which flows through at least one of the raw meal inlets 44, 46 is increased. Preferably, the total amount of raw meal flowing in the riser line 62 remains constant, so that the amount of raw meal is reduced at one raw meal inlet 44 and is increased accordingly at the at least one further raw meal inlet 46. If, for example, the temperature ascertained by means of one of the temperature measuring units 56, 58 falls below the temperature limiting value or the temperature limiting range, the amount of raw meal which flows through at least one of the raw meal inlets 44, 46 is reduced. For example, if a limiting value or limiting range is not reached, the amount of raw meal which flows through the second raw meal inlet 46 into the second treatment region 33 is reduced and the amount of raw meal through the first raw meal inlet 44 is increased accordingly.

[0070] FIG. 2 shows a cement production plant 10 having a single-strand preheater 12 for preheating raw meal, a calcinator 14 for calcinating the raw meal, a furnace 16, in particular a rotary kiln for firing the raw meal to form clinker, and a cooler 18 for cooling the clinker fired in the furnace 16. The calcinator 14 is, for example, an installation for thermal treatment described with reference to FIG. 1.

[0071] The preheater 12 comprises a plurality of cyclones 20 for separating the raw meal from the raw meal gas flow. For example, the preheater 12 has five cyclones 20, which are arranged in four cyclone stages one below another. The preheater 12 has a material inlet (not shown) for introducing raw meal into the uppermost cyclone stage of the preheater 12, comprising two cyclones 20. The raw meal flows through the cyclones 20 of the cyclone stages in succession in counter flow to the furnace and/or calcinator exhaust gas and is thus heated.

[0072] The calcinator 14 is arranged between the last and the next-to-last cyclone stage. The calcinator 14 has a riser line, in particular a riser pipe, having at least one calcinator firing system for heating the raw meal, so that calcination of the raw meal takes place in the calcinator 14. Furthermore, the calcinator 14 has a fuel inlet for introducing fuel and an inert gas inlet for introducing an inert gas into the riser line. The calcinator 14 furthermore has a combustion gas inlet for introducing, for example, oxygenated combustion gas into the riser line of the calcinator 14. The combustion gas is in particular the furnace exhaust gas enriched with oxygen. The oxygen fraction of the combustion gas is, for example, at most 85% between the furnace 16 and the calcinator 14. The calcinator exhaust gas is introduced into the preheater 12, preferably into the next-to-last cyclone stage, and leaves the preheater 12 after the uppermost cyclone stage as preheater exhaust gas 22.

[0073] The calcinator 14 has, for example, two fuel dispensing devices. It is also conceivable that the calcinator 14 only has precisely one fuel dispensing device or more than two fuel dispensing devices. The two fuel dispensing devices are optionally attached spaced apart from one another on the riser line 62 of the calcinator 14. In particular, the fuel dispensing devices are attached at different height levels to the riser line 62. Each fuel dispensing device is respectively associated with one fuel inlet 48, 50 and one inert gas inlet 52, 54, so that fuel and inert gas are conducted into the respective fuel dispensing device. The fuel dispensing devices are arranged, for example, offset by 180° in relation to one another. For example, the fuel dispensing device has a means for transporting the fuel, such as a conveyor screw or a chute. The introduction of the fuel or fuels can also take place pneumatically, for example, by the conveyance with the aid of an inert gas. The raw meal inlet in the calcinator 14 is formed, for example, by the solid outlet of the next-to-last cyclone stage.

[0074] In the flow direction of the raw meal, the furnace 16 is connected downstream of the preheater 12, so that the raw meal preheated in the preheater 12 and calcinated in the calcinator 14 flows into the furnace 16. The material inlet/gas outlet of the furnace 16 is directly connected to the riser line of the calcinator 14, so that the furnace exhaust gas flows into the calcinator 14 and subsequently into the preheater 12. The furnace 16 is, for example, a rotary kiln having a rotating tube rotatable around its longitudinal axis, which is arranged at a slightly falling angle. The furnace 12 has a furnace burner 28 at the material outlet-side end inside the rotating tube and an associated fuel inlet 30. The material outlet of the furnace 16 is arranged at the end of the rotating tube opposite to the material inlet 25, so that the raw meal is conveyed inside the rotating tube by the rotation of the rotating tube in the direction of the furnace burner 28 and the material outlet. The raw meal is fired inside the furnace 16 to form cement clinker. The sintering zone comprises the material outlet-side, rear region of the rotating tube, preferably the rear third in the material flow direction.

[0075] A fuel inlet 30 and an inert gas inlet are associated with the furnace burner 28, for example, so that fuel and inert gas are guided to the furnace burner 28. The fuel inlet 30 and the inert gas inlet are formed, for example, separately from one another or as a common inlet into the calcinator 14 or the furnace 16. The inert gas is, for example, CO2 or water vapor. The inert gas can be used both as a conveyance means and also to influence the ignition or control of the combustion process.

[0076] The cooler 18 for cooling the clinker adjoins the material outlet of the furnace 16. The cooler 18 has a cooling gas chamber 34, in which the clinker is cooled by a cooling gas flow. The clinker is conveyed in the conveyance direction F through the cooling gas chamber 34. The cooling gas chamber 34 has, for example, a first cooling gas chamber section 36 and a second cooling gas chamber section 38, which adjoins the first cooling gas chamber section 36 in the conveyance direction F. The furnace 16 is connected via the material outlet of the furnace 16 to the cooler 18, so that the clinker fired in the rotary kiln 20 falls into the cooler 18.

[0077] The first cooling gas chamber section 36 is arranged below the material outlet of the furnace 16, so that the clinker falls from the furnace 16 into the first cooling gas chamber section 36. The first cooling gas chamber section 36 represents an intake region of the cooler 18 and preferably has a static grate, which receives the clinker exiting from the furnace 16. The static grate is in particular arranged completely in the first cooling gas chamber section 36 of the cooler 10. The clinker preferably falls out of the furnace 16 directly onto the static grate. The static grate preferably extends completely at an angle of 10° to 35°, preferably 14° to 33°, in particular 21° to 25° in relation to the horizontal, so that the clinker slides along the static grate 40 in the conveyance direction.

[0078] The second cooling gas chamber section 38 of the cooler 18 adjoins the first cooling gas chamber section 36. In the first cooling gas chamber section 36 of the cooler 18, the clinker is in particular cooled to a temperature of less than 1000° C., wherein the cooling takes place in such a way that complete solidification of liquid phases present in the clinker into solid phases takes place. Upon leaving the first cooling gas chamber section 36 of the cooler 18, the clinker is preferably provided completely in the solid phase and at a temperature of at most 1150° C. In the second cooling gas chamber section 38 of the cooler 18, the clinker is cooled further, preferably to a temperature of less than 100° C. The second cooling gas flow can preferably be divided into multiple partial gas flows which have different temperatures.

[0079] The static grate of the first cooling gas chamber section 36 has, for example, passages through which a cooling gas enters the cooler 18 and the clinker. The cooling gas is generated, for example, by at least one fan, blower, or pressurized container arranged below the static grate, so that a first cooling gas flow flows from below through the static grate into the first cooling gas chamber section 36. The first cooling gas flow is, for example, pure oxygen or a gas having a fraction of 15 vol. % or less nitrogen and a fraction of 30 vol. % or more oxygen. The first cooling gas flow flows through the clinker and subsequently flows into the furnace 16. The first cooling gas flow partially or completely forms, for example, the combustion gas of the furnace 16. The high fraction of oxygen in the combustion gas results in a preheater exhaust gas which consists essentially of CO2 and water vapor and has the advantage that complex downstream purification methods for exhaust gas purification can be omitted. Furthermore, a reduction of the process gas amounts is achieved, so that the installation can be dimensioned significantly smaller.

[0080] Inside the cooler 18, the clinker to be cooled is moved in the conveyance direction F. The second cooling gas chamber section 38 preferably has a dynamic, in particular movable grate, which adjoins the static grate in the conveyance direction F. For example, a plurality of fans is arranged below the dynamic grate, by means of which the second cooling gas flow is blown from below through the dynamic rate. The second cooling gas flow is, for example, air.

[0081] In FIG. 1, for example, a crushing unit 48 adjoins the dynamic grate of the second cooling gas chamber section 38. At the crushing unit 48, a further dynamic grate adjoins below the crushing unit 48. The cold clinker preferably has a temperature of 100° C. or less upon leaving the cooler 18.

[0082] Cooler exhaust air is discharged from the second cooling gas chamber section 38, for example, and guided into a separator, for example a cyclone, for separating solids. The solids are supplied back to the cooler 18, for example. An air-air heat exchanger is connected downstream of the separator, so that the cooler exhaust air pre-heats air inside the heat exchanger, which is supplied, for example, to a raw mill.

[0083] FIG. 3 shows a further exemplary embodiment of an installation for thermal treatment 14, in particular a calcinator, which at least partially corresponds to the installation 14 of FIG. 1, wherein identical reference signs represent identical elements. For example, two fuel dispensing devices 64, 66 are attached to the riser line 62, via each of which fuel and inert gas are dispensed together.

[0084] The riser line 62 of the installation 14 has a plurality of different cross-sectional areas. The fuel dispensing devices 64, 66 of the installation 14 are attached, for example, without angle offset, on the same side of the riser line 62, but at different height levels. In the flow direction of the gas within the riser line 62, a raw meal inlet 44, 46 is preferably respectively connected directly upstream and/or downstream from each fuel dispensing device. The fuel inlet 48, 50 and the inert gas inlet 52, 54 are each arranged at the fuel dispensing device 64, 66 of the calcinator 14, in particular at the same height with the respective fuel dispensing device.

[0085] The cross-sectional constrictions ensure balanced mixing within the riser line and thus result in homogenization of the combustion and the temperature distribution in the longitudinal and transverse directions of the riser line of the calcinator.

[0086] FIG. 4 shows a detail of an installation 14, in particular a calcinator 14, according to FIGS. 1 to 3, wherein identical reference signs represent identical elements. The installation 14 has a guiding element 73, which is attached in the left illustration, for example, inside the riser line 62 and is attached in the right illustration, for example, to the fuel dispensing device in the special form of a flame tube.

[0087] In the left illustration, the guiding element 73 is arranged in such a way that it causes a constriction of the cross section of the riser line 62. The guiding element 73 is in particular made plate-shaped, chamber-shaped, or box-shaped and is attached to the inner wall of the riser line 62 and, for example, at the same height and opposite to the fuel dispensing device 66.

[0088] In the right illustration, the guiding element 73 has, for example, the form of a diffuser, wherein the cross section of the guiding element 73 increases in the flow direction of the fuel. The guiding element 73 is attached at the fuel dispensing device, in particular at the orifice of the fuel dispensing device into the riser line 62 and enables in particular a targeted introduction of the fuel into the riser line 62. It is also conceivable that the guiding element 73 terminates flush with the riser line and does not protrude therein, so that a uniform introduction of the fuel into the riser line 62 is enabled.

[0089] The guiding element 73 is formed, for example, from a high-temperature-proof ceramic or a fiber composite material.

LIST OF REFERENCE SIGNS

[0090] 10 cement production plant [0091] 12 preheater [0092] 14 installation for thermal treatment/calcinator [0093] 16 furnace [0094] 18 cooler [0095] 20 cyclone [0096] 22 preheater exhaust gas [0097] 28 burner or burner lance of the furnace [0098] 30 fuel inlet of the furnace [0099] 32 first treatment region [0100] 33 second treatment region [0101] 34 cooling gas chamber [0102] 36 first cooling gas chamber section [0103] 38 second cooling gas chamber section [0104] 40 cross-sectional constriction [0105] 42 cross-sectional constriction [0106] 44 first raw meal inlet [0107] 46 second raw meal inlet [0108] 48 first fuel inlet [0109] 50 second fuel inlet [0110] 52 first inert gas inlet [0111] 54 second inert gas inlet [0112] 56 temperature measuring unit [0113] 58 temperature measuring unit [0114] 60 regulating unit [0115] 62 riser line [0116] 64 fuel dispensing device [0117] 66 fuel dispensing device [0118] 73 guiding element