CA2872707A1 - Lock for pressurized coal gasification plants - Google Patents
Lock for pressurized coal gasification plants Download PDFInfo
- Publication number
- CA2872707A1 CA2872707A1 CA2872707A CA2872707A CA2872707A1 CA 2872707 A1 CA2872707 A1 CA 2872707A1 CA 2872707 A CA2872707 A CA 2872707A CA 2872707 A CA2872707 A CA 2872707A CA 2872707 A1 CA2872707 A1 CA 2872707A1
- Authority
- CA
- Canada
- Prior art keywords
- lock
- closure element
- housing
- subassembly
- gas generator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
- B01J3/02—Feed or outlet devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/0015—Feeding of the particles in the reactor; Evacuation of the particles out of the reactor
- B01J8/003—Feeding of the particles in the reactor; Evacuation of the particles out of the reactor in a downward flow
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/02—Fixed-bed gasification of lump fuel
- C10J3/20—Apparatus; Plants
- C10J3/30—Fuel charging devices
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/02—Fixed-bed gasification of lump fuel
- C10J3/20—Apparatus; Plants
- C10J3/34—Grates; Mechanical ash-removing devices
- C10J3/40—Movable grates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00743—Feeding or discharging of solids
- B01J2208/00752—Feeding
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2200/00—Details of gasification apparatus
- C10J2200/15—Details of feeding means
- C10J2200/156—Sluices, e.g. mechanical sluices for preventing escape of gas through the feed inlet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2900/00—Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
- F23J2900/01006—Airlock sealing associated with ash removal means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2203/00—Feeding arrangements
- F23K2203/10—Supply line fittings
- F23K2203/102—Flashback safety, e.g. inertizing devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2900/00—Special features of, or arrangements for fuel supplies
- F23K2900/03001—Airlock sections in solid fuel supply lines
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanically-Actuated Valves (AREA)
- Special Wing (AREA)
- Lift Valve (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The invention relates to a lock (2) for withdrawing ashes from or feeding coal to a pressurized gas generator (1) of a coal gasification plant.
Said lock comprises a lock chamber (3) and a mechanism for opening and closing the lock chamber (3). The lock of the invention is characterized in that the opening/closing mechanism comprises a valve-type subassembly (4) which can be mounted between the lock chamber (3) and the gas generator (1) and which includes a movable closing element (12) and devices for moving the closing element (12).
Said lock comprises a lock chamber (3) and a mechanism for opening and closing the lock chamber (3). The lock of the invention is characterized in that the opening/closing mechanism comprises a valve-type subassembly (4) which can be mounted between the lock chamber (3) and the gas generator (1) and which includes a movable closing element (12) and devices for moving the closing element (12).
Description
Description:
"Lock for pressurized coal gasification plants"
The invention relates to a lock for withdrawing ash from, or feeding coal into, a pressurized gas generator of a coal-gasification plant, having a lock chamber and a mechanism for opening and closing the lock chamber.
Such locks, which are known from use, make it possible, despite the internal pressure, for the gas generator to be opened in a controlled manner by the pressure in the lock chamber being brought into line with the pressure in the gas generator prior to ash being removed or coal being fed.
Of course, such locks are subjected to high levels of loading and, in particular, the sealing seats and closure elements thereof have to withstand, over long periods of time, both high temperatures and mechanical and chemical wear.
In the case of the known locks, significant parts of the opening/closing mechanism, in particular devices for moving a closure element, are accommodated in the lock chamber and elements for connecting these parts to a drive are led out of the lock chamber.
The operation of fastening the aforementioned parts by welding them in within the lock chamber requires a very high production outlay, in particular the use of complicated auxiliary devices and templates. Following the stress-relief annealing essential for the lock chamber, which forms a pressure vessel, the welded-in components also have to be processed mechanically, e.g.
on a drilling machine.
It is also the case, disadvantageously, that the internals decrease the useful volume of the lock
"Lock for pressurized coal gasification plants"
The invention relates to a lock for withdrawing ash from, or feeding coal into, a pressurized gas generator of a coal-gasification plant, having a lock chamber and a mechanism for opening and closing the lock chamber.
Such locks, which are known from use, make it possible, despite the internal pressure, for the gas generator to be opened in a controlled manner by the pressure in the lock chamber being brought into line with the pressure in the gas generator prior to ash being removed or coal being fed.
Of course, such locks are subjected to high levels of loading and, in particular, the sealing seats and closure elements thereof have to withstand, over long periods of time, both high temperatures and mechanical and chemical wear.
In the case of the known locks, significant parts of the opening/closing mechanism, in particular devices for moving a closure element, are accommodated in the lock chamber and elements for connecting these parts to a drive are led out of the lock chamber.
The operation of fastening the aforementioned parts by welding them in within the lock chamber requires a very high production outlay, in particular the use of complicated auxiliary devices and templates. Following the stress-relief annealing essential for the lock chamber, which forms a pressure vessel, the welded-in components also have to be processed mechanically, e.g.
on a drilling machine.
It is also the case, disadvantageously, that the internals decrease the useful volume of the lock
- 2 chamber. Complicated, tightly welded-in internals, in addition, make it more difficult for a corrosion-prevention means to be provided in the lock chamber, or prevent this altogether. The costs for maintaining the internals are extremely high since, for this purpose, in each case the entire lock has to be removed from the plant and transferred into a special maintenance workshop. In order for the parts which serve directly for closure purposes to be maintained, it is necessary for the entire opening/closing mechanism to be removed in each case.
All of the internals of the known locks, furthermore, are exposed to erosion, since they are located in the flow region of the material which passes through the lock.
It is an object of the invention to create a novel lock of the type mentioned in the introduction which can be produced with a lower level of outlay, and requires less maintenance, than the known locks of this type.
The lock according to the invention for achieving this object is characterized in that the opening/closing mechanism comprises a subassembly in the manner of a valve with a movable closure element, which can be installed between the lock chamber and the gas generator, and devices for moving the closure element.
It is advantageous according to the invention for the significant parts of the opening/closing mechanism to be concentrated in a separate subassembly which can be installed as a complete unit, can be produced with considerably reduced outlay and, for maintenance purposes, can be conveniently removed as a whole. It is no longer the case that any space is required for the opening/closing mechanism in the lock chamber as such.
All of the internals of the known locks, furthermore, are exposed to erosion, since they are located in the flow region of the material which passes through the lock.
It is an object of the invention to create a novel lock of the type mentioned in the introduction which can be produced with a lower level of outlay, and requires less maintenance, than the known locks of this type.
The lock according to the invention for achieving this object is characterized in that the opening/closing mechanism comprises a subassembly in the manner of a valve with a movable closure element, which can be installed between the lock chamber and the gas generator, and devices for moving the closure element.
It is advantageous according to the invention for the significant parts of the opening/closing mechanism to be concentrated in a separate subassembly which can be installed as a complete unit, can be produced with considerably reduced outlay and, for maintenance purposes, can be conveniently removed as a whole. It is no longer the case that any space is required for the opening/closing mechanism in the lock chamber as such.
- 3 -=
The interior of the lock chamber can be kept entirely free of parts of the opening/closing mechanism.
It is advantageous for the opening/closing mechanism of the lock to have a further such subassembly as can be installed at an outlet or inlet of the lock chamber, said outlet or inlet being directed away from the gas generator. Accordingly, the subassembly can be used on the entry and exit sides both at the coal lock and at the ash lock of a pressurized coal-gasification plant.
The subassembly expediently has a housing with a respective flange on mutually opposite sides of the housing for connecting to the gas generator and the lock chamber.
The aforementioned closure element is preferably designed in the manner of a plunger with a closure head and a stem part.
In a particularly preferred embodiment of the invention, the stem part has a sleeve which is open on one side and can be moved on, and guided by, a bolt, which projects axially into the sleeve. The sleeve advantageously shields the guide bolt against the oncoming material.
In an expedient design, the guide bolt projects from a crosspiece, by means of which mutually opposite wall portions of the housing are connected to one another.
It is expediently the case that the crosspiece, which is located in the material stream, is thin, and therefore it does not obstruct the material stream and, itself, is not subjected to any high degree of wear.
In a further advantageous configuration of the invention, the closure element is arranged coaxially in relation to a cylindrical part of the housing. Such an
The interior of the lock chamber can be kept entirely free of parts of the opening/closing mechanism.
It is advantageous for the opening/closing mechanism of the lock to have a further such subassembly as can be installed at an outlet or inlet of the lock chamber, said outlet or inlet being directed away from the gas generator. Accordingly, the subassembly can be used on the entry and exit sides both at the coal lock and at the ash lock of a pressurized coal-gasification plant.
The subassembly expediently has a housing with a respective flange on mutually opposite sides of the housing for connecting to the gas generator and the lock chamber.
The aforementioned closure element is preferably designed in the manner of a plunger with a closure head and a stem part.
In a particularly preferred embodiment of the invention, the stem part has a sleeve which is open on one side and can be moved on, and guided by, a bolt, which projects axially into the sleeve. The sleeve advantageously shields the guide bolt against the oncoming material.
In an expedient design, the guide bolt projects from a crosspiece, by means of which mutually opposite wall portions of the housing are connected to one another.
It is expediently the case that the crosspiece, which is located in the material stream, is thin, and therefore it does not obstruct the material stream and, itself, is not subjected to any high degree of wear.
In a further advantageous configuration of the invention, the closure element is arranged coaxially in relation to a cylindrical part of the housing. Such an
- 4 -arrangement, with given dimensions of the subassembly, allows the greatest possible through-passage cross section.
The aforementioned devices for moving the closure element expediently have linkage elements extending radially from the closure element.
In particular, these linkage elements project into radial widened formations of the cylindrical part of the housing, wherein those parts of the linkage elements which are more remote from the closure element are subjected to increasingly reduced levels of loading by oncoming material and the effect of temperature.
In one embodiment, the linkage elements are pivot levers which are articulated on the closure element and, at their end which is directed away from the closure element, are connected rigidly to a shaft which is mounted on the housing and is led out of the housing. Said shaft can be rotated via a crank element, wherein the pivot levers, which are articulated on the closure element preferably via a slot, move the closure element axially.
In an alternative embodiment, the linkage elements are rods which are connected rigidly to the closure element and, at their other end, are connected rigidly to a pull/push rod which can be moved parallel to the closure element and is led out of the housing.
Both the aforementioned shafts and the pull/push rods are arranged far outward in the radial direction, where there is sufficient installation space available for driving means.
It is expediently the case that the housing is connected, on the outside, to at least one power
The aforementioned devices for moving the closure element expediently have linkage elements extending radially from the closure element.
In particular, these linkage elements project into radial widened formations of the cylindrical part of the housing, wherein those parts of the linkage elements which are more remote from the closure element are subjected to increasingly reduced levels of loading by oncoming material and the effect of temperature.
In one embodiment, the linkage elements are pivot levers which are articulated on the closure element and, at their end which is directed away from the closure element, are connected rigidly to a shaft which is mounted on the housing and is led out of the housing. Said shaft can be rotated via a crank element, wherein the pivot levers, which are articulated on the closure element preferably via a slot, move the closure element axially.
In an alternative embodiment, the linkage elements are rods which are connected rigidly to the closure element and, at their other end, are connected rigidly to a pull/push rod which can be moved parallel to the closure element and is led out of the housing.
Both the aforementioned shafts and the pull/push rods are arranged far outward in the radial direction, where there is sufficient installation space available for driving means.
It is expediently the case that the housing is connected, on the outside, to at least one power
- 5 -cylinder, which moves the shafts via a respective crank element or the pull/push rods.
It is preferably the case that the parts which are exposed to the material stream have a roof-shaped cross section with a roof peak directed counter to the material stream.
The invention will be explained in more detail hereinbelow with reference to exemplary embodiments and the accompanying drawings, which relate to said exemplary embodiments and in which:
figure 1 shows partial views in section (a) and (b) of a first exemplary embodiment for a lock according to the invention, figure 2 shows a cross-sectional view of a valve-like subassembly of the lock from figure 1, figure 3 shows a side view of a valve-like subassembly with two hydraulic cylinders, figure 4 shows partial views in section (a) and (b) of a further exemplary embodiment for a lock according to the invention, figure 5 shows a cross-sectional view of a valve-like subassembly of the lock from figure 4, figure 6 shows a detail of the lock from figure 4, and figure 7 shows a schematic illustration of a pressurized coal-gasification plant with valve-like subassemblies according to the invention.
A pressurized coal-gasification plant, which is illustrated as a basic diagram in figure 7, comprises a pressurized gas generator 1, to which coal can be fed from above via a lock 2'. A further lock 2 for withdrawing ash is located on the underside of the gas generator. Each of the locks 2, 2' comprises a respective lock chamber 3, 3'. A respective subassembly
It is preferably the case that the parts which are exposed to the material stream have a roof-shaped cross section with a roof peak directed counter to the material stream.
The invention will be explained in more detail hereinbelow with reference to exemplary embodiments and the accompanying drawings, which relate to said exemplary embodiments and in which:
figure 1 shows partial views in section (a) and (b) of a first exemplary embodiment for a lock according to the invention, figure 2 shows a cross-sectional view of a valve-like subassembly of the lock from figure 1, figure 3 shows a side view of a valve-like subassembly with two hydraulic cylinders, figure 4 shows partial views in section (a) and (b) of a further exemplary embodiment for a lock according to the invention, figure 5 shows a cross-sectional view of a valve-like subassembly of the lock from figure 4, figure 6 shows a detail of the lock from figure 4, and figure 7 shows a schematic illustration of a pressurized coal-gasification plant with valve-like subassemblies according to the invention.
A pressurized coal-gasification plant, which is illustrated as a basic diagram in figure 7, comprises a pressurized gas generator 1, to which coal can be fed from above via a lock 2'. A further lock 2 for withdrawing ash is located on the underside of the gas generator. Each of the locks 2, 2' comprises a respective lock chamber 3, 3'. A respective subassembly
-6-4, 4', 4", 4", which operates like a valve and will be described hereinbelow with reference to figures 1 to 6, is located between the lock chambers 3, 3' and the gas generator 1 and also at the entry to the lock 2' and the exit from the lock 2.
Figure 1 shows exemplary embodiments for the valve-like subassembly 4 between the gas generator 1 and the lock chamber 3 and an exemplary embodiment for a valve-like subassembly 4' at the lower end of the lock chamber 3, said subassembly 4' corresponding essentially to the subassembly 4.
The two subassemblies 4, 4' each have a housing 5 with a round-cylindrical housing part 6 and radial widened formations 7 and 8. The subassembly 4 is screw-connected to the gas generator 1 and the lock chamber 3 via flanges 9 and 10 on the round-cylindrical part 6 of the housing 5. In the case of the subassembly 4', there is a screw-connection between the corresponding flange 9 and the lock chamber 3. The housing 5 has a respective inspection opening 11.
A plunger-like closure element 12 with an upwardly conical closure head 14 is arranged coaxially in relation to the cylindrical part 6 of the housing 5 and, in the position which is shown in figure 1, rests on a closure seat 13, with the gas generator 1 being sealed in the process. The closure head 14 is connected to a push rod which is coaxial in relation to the cylinder axis of the cylindrical part 6 of the housing 5, merges into a sleeve 15 and, together with the sleeve, forms the stem part of the plunger-like closure element 12. The sleeve 15, which is open in the downward direction, can be moved axially on a bolt 16 and is correspondingly guided by the bolt 16. The bolt 16 is connected rigidly to a crosspiece 17, by means of
Figure 1 shows exemplary embodiments for the valve-like subassembly 4 between the gas generator 1 and the lock chamber 3 and an exemplary embodiment for a valve-like subassembly 4' at the lower end of the lock chamber 3, said subassembly 4' corresponding essentially to the subassembly 4.
The two subassemblies 4, 4' each have a housing 5 with a round-cylindrical housing part 6 and radial widened formations 7 and 8. The subassembly 4 is screw-connected to the gas generator 1 and the lock chamber 3 via flanges 9 and 10 on the round-cylindrical part 6 of the housing 5. In the case of the subassembly 4', there is a screw-connection between the corresponding flange 9 and the lock chamber 3. The housing 5 has a respective inspection opening 11.
A plunger-like closure element 12 with an upwardly conical closure head 14 is arranged coaxially in relation to the cylindrical part 6 of the housing 5 and, in the position which is shown in figure 1, rests on a closure seat 13, with the gas generator 1 being sealed in the process. The closure head 14 is connected to a push rod which is coaxial in relation to the cylinder axis of the cylindrical part 6 of the housing 5, merges into a sleeve 15 and, together with the sleeve, forms the stem part of the plunger-like closure element 12. The sleeve 15, which is open in the downward direction, can be moved axially on a bolt 16 and is correspondingly guided by the bolt 16. The bolt 16 is connected rigidly to a crosspiece 17, by means of
- 7 -which mutually opposite wall portions of the housing 5 are connected to one another.
Pivot levers 18 and 18' each have one end articulated, via slots, on extension arms of the sleeve 15 and, at their other end, are connected rigidly to a respective shaft 20, 20'. The shafts 20, 20', as can be seen in particular in figure 2, can be rotated in bearing means 19 and 19', which are connected to the housing 5 on two wall portions of the widened formation 7, 8, said wall portions being spaced apart opposite one another.
As can also be seen in figure 2, the shafts 20, 20' are each connected rigidly to a respective connecting rod, 21, 21'. A hydraulic cylinder 22, which is articulated on the free ends of the connecting rods 21, 21', can be used to rotate the shafts 20, 21 and thus rotate the pivot arms 18, 18', with the closure element 12 being displaced in the process.
As can be gathered from figure 3, instead of a hydraulic cylinder 22, it is also possible to use two separate cylinders 23 and 23', each rotating the respective shaft 20, 20'.
It can also be seen from figure 1 that the closure seat 13 is formed by an annular element 30 which is secured between the gas generator 1 or the lock chamber 3 and the housing 5 of the subassembly 4 or 4', said housing being connected to the gas generator or the lock chamber in each case. The annular element 30 comprises a plurality of individual rings, which are produced from different materials and meet the requirements relating to strength, temperature resistance and sealing.
In order to withdraw ash from the gas generator 1, with the aid of the hydraulic cylinder 22 or of the two
Pivot levers 18 and 18' each have one end articulated, via slots, on extension arms of the sleeve 15 and, at their other end, are connected rigidly to a respective shaft 20, 20'. The shafts 20, 20', as can be seen in particular in figure 2, can be rotated in bearing means 19 and 19', which are connected to the housing 5 on two wall portions of the widened formation 7, 8, said wall portions being spaced apart opposite one another.
As can also be seen in figure 2, the shafts 20, 20' are each connected rigidly to a respective connecting rod, 21, 21'. A hydraulic cylinder 22, which is articulated on the free ends of the connecting rods 21, 21', can be used to rotate the shafts 20, 21 and thus rotate the pivot arms 18, 18', with the closure element 12 being displaced in the process.
As can be gathered from figure 3, instead of a hydraulic cylinder 22, it is also possible to use two separate cylinders 23 and 23', each rotating the respective shaft 20, 20'.
It can also be seen from figure 1 that the closure seat 13 is formed by an annular element 30 which is secured between the gas generator 1 or the lock chamber 3 and the housing 5 of the subassembly 4 or 4', said housing being connected to the gas generator or the lock chamber in each case. The annular element 30 comprises a plurality of individual rings, which are produced from different materials and meet the requirements relating to strength, temperature resistance and sealing.
In order to withdraw ash from the gas generator 1, with the aid of the hydraulic cylinder 22 or of the two
- 8 -=
cylinders 23, 23', the shafts 20, 20' of the subassembly 4 are rotated, and therefore the pivot levers 18, 18' pivot into the position indicated by dashed lines. The pivot levers here move the closure element 12 axially, as a result of which the closure head 14 lifts up from the closure seat 13 and is displaced into the position indicated by dashed lines.
Ash can then pass, through the freed passage, from the gas generator 1, through the cylindrical part 6 of the housing 5, into the lock chamber 3, of which the internal pressure has previously been brought into line with the pressure prevailing in the gas generator 1.
The upwardly conical shape of the closure head 14 promotes the flow of ash, as do the bevels of the annular element 30 which are formed above the closure seat 13. The widened formations 7, 8 each have a sloping base, and therefore ash exiting laterally at the passage passes of its own accord back into the main stream. The sleeve 15 covers large parts of the bolt 16 in relation to the stream of ash, and therefore the bolt 16, as the part which guides the closure element 12, is not subjected to any high level of wear.
The rotatable shafts 20, 20' seal the housing in the outward direction. During rotation, no ash passes into the region between the bearing means 19, 19' and the respective shaft 20, 20'.
In order to empty the lock chamber 3, with the connection between the gas generator 1 and the lock chamber 3 closed by way of the subassembly 4, and with external pressure prevailing in the chamber 3, an opening is established at the lower end of the lock chamber 3 with the aid of the subassembly 4' and all the ash is let out of the lock chamber.
. .
cylinders 23, 23', the shafts 20, 20' of the subassembly 4 are rotated, and therefore the pivot levers 18, 18' pivot into the position indicated by dashed lines. The pivot levers here move the closure element 12 axially, as a result of which the closure head 14 lifts up from the closure seat 13 and is displaced into the position indicated by dashed lines.
Ash can then pass, through the freed passage, from the gas generator 1, through the cylindrical part 6 of the housing 5, into the lock chamber 3, of which the internal pressure has previously been brought into line with the pressure prevailing in the gas generator 1.
The upwardly conical shape of the closure head 14 promotes the flow of ash, as do the bevels of the annular element 30 which are formed above the closure seat 13. The widened formations 7, 8 each have a sloping base, and therefore ash exiting laterally at the passage passes of its own accord back into the main stream. The sleeve 15 covers large parts of the bolt 16 in relation to the stream of ash, and therefore the bolt 16, as the part which guides the closure element 12, is not subjected to any high level of wear.
The rotatable shafts 20, 20' seal the housing in the outward direction. During rotation, no ash passes into the region between the bearing means 19, 19' and the respective shaft 20, 20'.
In order to empty the lock chamber 3, with the connection between the gas generator 1 and the lock chamber 3 closed by way of the subassembly 4, and with external pressure prevailing in the chamber 3, an opening is established at the lower end of the lock chamber 3 with the aid of the subassembly 4' and all the ash is let out of the lock chamber.
. .
- 9 -In the case of maintenance, the subassemblies 4, 4' are each removed as a whole unit and possibly changed over for a subassembly which has already been serviced.
In the case of the exemplary embodiment shown in figures 4 to 6, like or like-acting parts have the same designations as in the preceding exemplary embodiment, the letter a having been added to the relevant designation.
The exemplary embodiment according to figures 4 to 6 differs from the exemplary embodiment described above in that, rather than pivot levers being articulated on a sleeve 15a of a closure element 12, the sleeve 15a is connected rigidly to a pull/push rod 25, 25' via a respective connecting rod 24, 24'. The pull/push rod 25, 25' can be moved parallel to the longitudinal axis of the sleeve 15a in a respective bearing means 26, 26' connected to a housing 5a.
As can be seen in figures 5 and 6, the pull/push rods 25, 25' are moved in each case with the aid of two hydraulic cylinders 27, 28, which act on a transverse rod 29, which crosses the pull/push rod 25, 25'.
In the case of the exemplary embodiment shown in figures 4 to 6, like or like-acting parts have the same designations as in the preceding exemplary embodiment, the letter a having been added to the relevant designation.
The exemplary embodiment according to figures 4 to 6 differs from the exemplary embodiment described above in that, rather than pivot levers being articulated on a sleeve 15a of a closure element 12, the sleeve 15a is connected rigidly to a pull/push rod 25, 25' via a respective connecting rod 24, 24'. The pull/push rod 25, 25' can be moved parallel to the longitudinal axis of the sleeve 15a in a respective bearing means 26, 26' connected to a housing 5a.
As can be seen in figures 5 and 6, the pull/push rods 25, 25' are moved in each case with the aid of two hydraulic cylinders 27, 28, which act on a transverse rod 29, which crosses the pull/push rod 25, 25'.
Claims (12)
1. A lock (2, 2') for withdrawing ash from, or feeding coal into, a pressurized gas generator (1) of a coal-gasification plant, having a lock chamber (3, 3') and a mechanism for opening and closing the lock chamber (3, 3'), characterized in that the opening/closing mechanism comprises a subassembly (4, 4") in the manner of a valve with a movable closure element (12), which can be installed between the lock chamber (3, 3') and the gas generator (1), and devices for moving the closure element (12).
2. The lock as claimed in claim 1, characterized in that the opening/closing mechanism also has such a subassembly (4, 4") as can be installed at an outlet or inlet of the lock chamber (3, 3'), said outlet or inlet being directed away from the gas generator (1).
3. The lock as claimed in claim 1 or 2, characterized in that the subassembly (4) has a housing (5) with a respective connecting flange (9, 10) on mutually opposite sides.
4. The lock as claimed in one of claims 1 to 3, characterized in that the closure element (12) is designed in the manner of a plunger with a closure head (12) and a stem part.
5. The lock as claimed in claim 4, characterized in that the stem part comprises a sleeve (15) which is open on one side and is guided on a bolt (16), which projects axially into the sleeve (15).
6. The lock as claimed in claim 4, characterized in that the bolt (16) projects from a crosspiece (17), by means of which mutually opposite wall portions of the housing (5) are connected to one another.
7. The lock as claimed in one of claims 3 to 6, characterized in that the closure element (12) is arranged coaxially in relation to a cylindrical part (6) of the housing (5) -
8. The lock as claimed in one of claims 1 to 7, characterized in that the devices for moving the closure element (12) have linkage elements (18, 24) extending radially from the closure element (12).
9. The lock as claimed in claim 8, characterized in that the linkage elements (18, 24) project into widened formations (7, 8) extending radially from the cylindrical part (6) of the housing (5).
10. The lock as claimed in claim 8 or 9, characterized in that the linkage elements (18, 24) comprise pivot levers (18, 18') which are articulated on the closure element (12) and, at their end which is directed away from the closure element, connected rigidly to a shaft (20, 20') which is mounted on the housing (5) and is led out of the housing (5).
11. The lock as claimed in one of claims 8 to 10, characterized in that the linkage elements (18, 24) are rods which are connected rigidly to the closure element (12) at one end and, at their other end, are connected rigidly to a pull/push rod (25, 25') which can be moved parallel to the closure element (12) and is led out of the housing (5).
12. The lock as claimed in one of claims 3 to 11, characterized in that the housing (5) is connected, on the outside, to at least one power cylinder (22, 23), which moves the shaft (20, 20') via a crank element (21, 21') or onto the pull/push rod (25, 25') via a transverse rod (29).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012009515.5 | 2012-05-14 | ||
| DE102012009515A DE102012009515A1 (en) | 2012-05-14 | 2012-05-14 | Sluice for coal pressure gasification plants |
| PCT/DE2013/100140 WO2013170850A1 (en) | 2012-05-14 | 2013-04-17 | Lock for pressurized coal gasification plants |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2872707A1 true CA2872707A1 (en) | 2013-11-21 |
| CA2872707C CA2872707C (en) | 2019-12-31 |
Family
ID=48626224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2872707A Expired - Fee Related CA2872707C (en) | 2012-05-14 | 2013-04-17 | Lock for pressurized coal gasification plants |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP2850025B1 (en) |
| CN (1) | CN104284852B (en) |
| AU (1) | AU2013262161B2 (en) |
| CA (1) | CA2872707C (en) |
| DE (1) | DE102012009515A1 (en) |
| WO (1) | WO2013170850A1 (en) |
| ZA (1) | ZA201409106B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1063516B (en) * | 1952-04-05 | 1959-08-13 | Beckenbach Karl | Loading or emptying device for shaft ovens |
| DE924767C (en) * | 1952-09-10 | 1955-03-07 | Koppers Gmbh Heinrich | Closure device for loading and unloading bulk goods into or out of gas-filled spaces |
| LU45849A1 (en) * | 1964-04-10 | 1964-06-10 | ||
| DE2657742A1 (en) * | 1976-12-20 | 1978-06-22 | Mittelmann Gmbh & Co Kg | Transferring bulk goods from one container to another - using air-lock chamber and pressure equalisation procedures to assist transfer operation |
| DE3229841A1 (en) * | 1982-08-11 | 1984-02-16 | Davy McKee AG, 6000 Frankfurt | Conical seal between vessels |
| DE4037669A1 (en) * | 1990-11-27 | 1992-06-04 | Schwarze Pumpe Energiewerke Ag | Reducing oxygen@-contg. condensates in Ash-removal section of coal-gasification plant - uses addn. of inert gas, pref. nitrogen, above top plug of ash-sluice system to control oxygen@ content, reducing corrosion |
| CN2735092Y (en) * | 2004-08-13 | 2005-10-19 | 中冶南方工程技术有限公司 | Conical ring seam regulating valve for dust removal of blast furnace gas |
| CN201262243Y (en) * | 2008-08-14 | 2009-06-24 | 闵和清 | Telescopic lower wedge hydraulic sluice valve |
| CN202040262U (en) * | 2011-08-08 | 2011-11-16 | 湘电重型装备股份有限公司 | Front axle hydro-pneumatic suspension for large surface mine motorized wheel dump truck |
-
2012
- 2012-05-14 DE DE102012009515A patent/DE102012009515A1/en not_active Withdrawn
-
2013
- 2013-04-17 WO PCT/DE2013/100140 patent/WO2013170850A1/en active Application Filing
- 2013-04-17 EP EP13728937.7A patent/EP2850025B1/en active Active
- 2013-04-17 CA CA2872707A patent/CA2872707C/en not_active Expired - Fee Related
- 2013-04-17 AU AU2013262161A patent/AU2013262161B2/en not_active Ceased
- 2013-04-17 CN CN201380025432.1A patent/CN104284852B/en not_active Expired - Fee Related
-
2014
- 2014-12-11 ZA ZA2014/09106A patent/ZA201409106B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP2850025B1 (en) | 2018-03-28 |
| DE102012009515A1 (en) | 2013-11-14 |
| ZA201409106B (en) | 2016-09-28 |
| WO2013170850A1 (en) | 2013-11-21 |
| EP2850025A1 (en) | 2015-03-25 |
| AU2013262161B2 (en) | 2017-04-06 |
| CN104284852B (en) | 2017-10-13 |
| CN104284852A (en) | 2015-01-14 |
| CA2872707C (en) | 2019-12-31 |
| AU2013262161A1 (en) | 2014-11-27 |
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| EEER | Examination request |
Effective date: 20180223 |
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| MKLA | Lapsed |
Effective date: 20220301 |
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| MKLA | Lapsed |
Effective date: 20200831 |