CA2266328A1 - Process for monitoring the operation of a device for feeding an abrasive medium by means of a fluid - Google Patents
Process for monitoring the operation of a device for feeding an abrasive medium by means of a fluid Download PDFInfo
- Publication number
- CA2266328A1 CA2266328A1 CA 2266328 CA2266328A CA2266328A1 CA 2266328 A1 CA2266328 A1 CA 2266328A1 CA 2266328 CA2266328 CA 2266328 CA 2266328 A CA2266328 A CA 2266328A CA 2266328 A1 CA2266328 A1 CA 2266328A1
- Authority
- CA
- Canada
- Prior art keywords
- fluid
- burner
- melting gasifier
- conveyor tube
- oxygen
- 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.)
- Abandoned
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/02—Making special pig-iron, e.g. by applying additives, e.g. oxides of other metals
- C21B5/023—Injection of the additives into the melting part
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/02—Making special pig-iron, e.g. by applying additives, e.g. oxides of other metals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P13/00—Indicating or recording presence, absence, or direction, of movement
- G01P13/0006—Indicating or recording presence, absence, or direction, of movement of fluids or of granulous or powder-like substances
- G01P13/0066—Indicating or recording presence, absence, or direction, of movement of fluids or of granulous or powder-like substances by using differences of pressure in the fluid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P13/00—Indicating or recording presence, absence, or direction, of movement
- G01P13/0006—Indicating or recording presence, absence, or direction, of movement of fluids or of granulous or powder-like substances
- G01P13/0073—Indicating or recording presence, absence, or direction, of movement of fluids or of granulous or powder-like substances by using vibrations generated by the fluid
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Gasification And Melting Of Waste (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Processing Of Solid Wastes (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Measuring Volume Flow (AREA)
- Regulation And Control Of Combustion (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
- Blast Furnaces (AREA)
Abstract
The invention concerns a method of monitoring the operation of a system for feeding an abrasive medium using fluid as conveying medium for at least one burner in a fusion vaporizer plant. The dust extracted from a fusion vaporizer plant or reduction shaft furnace is to be introduced by means of a fluid and via a dust-conveyer tube through at least one dust burner into the fusion vaporizer plant as an additional carbon-carrier. However, the method can also be applied in other melting or incineration plants, such as for example fluid bed reactors. The object to be achieved by this method is to determine as rapidly as possible whether hot gases or unburned oxygen have/has flowed back into the dust-recycling system. To that end, the flow direction in the feed system conveying pipe is measured downstream of the burner or burners. When backflow of the fluid flow is determined or when the presence of oxygen which has penetrated the feed system is determined, the feed system is stopped.
Description
Method of monitoring the operation of a device for feeding an abrasive medium by mean~ of a fluid.
The invention relates to a method of monitoring the operation of a device for feeding an abrasive medium, especially of a dust-recycling system, into a melting gasifier, the dust extracted from a melting gasifier or reduction shaft furnace being introduced by means of a fluid via a dust conveyor tube through at least one dust burner into the melting gasifier as an additional carbon carrier. The method can also, however, be used for the feeding of abrasive media by means of fluid injection into other melting or incineration plants, such as e.g. fluid bed reactors.
From DE 40 41 936 C1 is known a way of feeding the gases, of deposited hot dusts, streaming out of melting gasifiers or reduction shaft furnaces, back into the process of a melting gasifier. In this process, an injector is used in order to pass the dust which is to be recycled via a dust conveyor tube and via at least one dust burner back into the melting gasifier.
During operation, under the known severe conditions for melting gasifiers, hot gases or unburned oxygen can flow back into the dust recycling system. In such a case, there exists the very great danger that plant ,, ~ .. ... "
components can be damaged or destroyed as a result of an explosion.
It is therefore the purpose of the invention to detect such a state as soon as possible and reliably to prevent any threat being caused by gases flowing back into the dust recycling system.
According to the invention, this purpose is fulfilled by the features contained in claim 1. Advantageous embodiments and developments of the invention arise with the exploitation of the features mentioned in the subordinate claims.
Through detecting the flow direction in the conveyor tube of a dust recycling system, the returned dust being the abrasive medium and being used as an additional carbon carrier in the melting gasifier, it is possible in a simple and reliable way to determine whether any undesired backflow of gases is occurring and a corresponding scenario can be initiated which reliably prevents a threat such as already mentioned (explosion) from occurring.
A favourable possibility for this consists in monitoring simultaneously the pressure in the melting gasifier and in the dust conveyor tube. If a rise in pressure in the dust conveyor tube is detected, in the case where there is no corresponding rise in pressure in the melting gasifier, it can be clearly inferred than an undesired operating situation has been reached which can pose a threat to the system. With such a measuring result, in this case it can be inferred that hot gas or oxygen has penetrated into the dust conveying system of the dust-recycling system and this must be reacted to appropriately in order to overcome a state of danger.
A particularly advantageous way of determining the flow direction in the dust conveyor tube consists in the fact that at least two measuring channels are led through the wall of the dust conveyor tube, the angles of inclination of these measuring channels being different in relation to the longitudinal axis of the dust conveyor tube in the measuring plane. A measuring channel can here be inclined orthogonally to the longitudinal axis of the dust conveyor tube and the second measuring channel can be inclined at an acute angle to this axis.
As is also the case with other measuring methods which are based on the principle of fluid dynamics, it has an advantageous effect, in order to prevent blocking of the measuring channel apertures, if a fluid is led through said apertures into the conveying flow.
_ . . ~
Nitrogen suggests itself in particular as such a measurement fluid since nitrogen, as a known inert gas, cannot lead to any threat in the dust-recycling system.
As a result of the differing inclination of the measuring channels in relation to the longitudinal axis of the dust conveyor tube, the pressures in both measuring channels - with the exception of the operating point which is defined by the zero crossing or null balance - always differ, the pressure difference being - under otherwise identical conditions - a measurement for the flow velocity in the conveyor tube. If expediently a null balance is carried out for the current-free state, a reversal of the flow direction can be directly inferred from a change of sign of the pressure difference, which reversal is a pre-requisite for the feared case of a backflow of hot flame gases or oxygen into a dust conveyor tube. The proposed arrangement of the measuring channels can, however, be adapted to different conditions by other variants, especially different selected angles of incllnation, of the measuring channels whose pressure values are to be compared with one another.
A further possible way of monitoring the backflow of oxygen into the dust-recycling system consists in the fact that a flame guard is led through the wall of the dust conveyor tube. In this process, problems must be taken into account which can occur through possible blockages caused by dust. Negative effects which occur from harmful components (e.g. H2S) in the conveyor flow must likewise be taken into account. The flame guard has a fuel-gas supply and an ignition device which can for example be configured as a heat plug or a spark generator. If oxygen penetrates via the aperture of the dust burner into the dust conveyor tube and reaches the flame guard, the ignition of the combustible gas mixture occurs and this can be detected via optical or acoustic sensors or via a measurement of temperature.
The invention is to be described in more detail below with the aid of embodiments, given by way of example.
Here the figures show:
Fig. 1 a block diagram of the application of a fluid dynamic measurement principle with two measuring channels;
Fig. 2 variants for possible measuring channel arrangements and Fig. 3 the monitoring of a dust conveyor tube by means of a flame guard.
In the principle of a pressure difference measurement shown in Fig. 1, this measurement is carried out in two measuring channels 1 and 2. The measuring channels 1 and 2 are here configured as bores which are led through the wall of the dust conveyor tube 3. The measuring channel 1 is here inclined orthogonally to the longitudinal axis of the dust conveyor tube 3 and the measuring channel 2 is inclined at an acute angle to same. The arrow Vc drawn in Fig. 1 indicates the direction in which a danger situation can occur, i.e.
hot gases or oxygen flow back into the system. In principle, a reverse arrangement of the probes in relation to the flow direction can also be used.
Nitrogen is fed into the measuring channels 1 and 2 via a supply line 4. The volume flow of the nitrogen which is led into the measuring channels 1 and 2 is kept constant by means of a control system. For this purpose, volume flow sensors 5 and 6 with control valves 7 and 8 are present. For the supply of the measurement fluid (nitrogen), a further valve 9 is present in conjunction with a pressure sensor 10.
As well as the measurement of the pressure difference in the measuring channels 1 and 2, the absolute pressure in the dust conveyor tube 3 is monitored by means of a further pressure sensor 11.
The pressure difference in the measuring channels 1 and 2 is measured by means of pressure sensor 12. The pressure difference detected is a measurement for the flow velocity in the conveyor tube. If a null balance ... . .
is carried out for the current-free state, it is possible with the aid of a change of sign of the pressure difference to detect that backflow into the dust conveyor tube 3 has taken place and a corresponding signal can be generated in order to shut off the supply of oxygen. The suitable shut-off mechanism for this purpose is not shown in this illustration.
Through the fact that the absolute setting values for the two measurement fluid flows through the measuring channels 1 and 2 can be favourably chosen with regard to the required measuring sensitivity and the measuring range for the measurement of the pressure difference, an optimum region suitable for monitoring can be set without problem. Via the setting of the ratio of the measurement fluid flows, a null balance of the pressure difference can be carried out moreover.
Through the parallel injection of the measurement fluid via the two measuring channels 1 and 2 and the measurement of the difference in pressure between these two measuring channels, the measured value is practically independent of the static pressure and is only affected directly by the static pressure (namely via the density) of the gas used. Through the slight inclination of the measuring channels transversely to the flow direction (bore in the wall of the dust conveyor tube 3), the ideal Bernouilli measurement principle Pd~ = Ptotal ~ Pstat cannot be realised and a corresponding measurement arrangement must be calibrated.
From Fig. 2 can be taken altogether six different possible arrangements of respectively two measuring channels. Here the arrangements shown in the upper row are so chosen that the corresponding apertures of the respective measuring channels are disposed at one point in the dust conveyor tube 3.
However, there also exists the possibility of arranging the measuring apertures of the measuring channels in different places, as can be seen from the lower row of Fig. 2. If the latter arrangement is chosen, what must be considered is that an increased time constant, which is determined by the spacing of the measurement apertures, must be taken into account when the difference in pressure between the measuring channels 1 and 2 is measured directly.
Moreover, when the version which has the measuring channels in one point is used, under certain circumstances a significantly higher measuring sensitivity can be achieved than with the version with separate measuring points.
From Fig. 3 can be taken a further example of an embodiment of a monitoring system configured according to the invention in which a flame guard 13 is used.
The flame guard 13 is here led at least partially through the wall of the dust conveyor tube 3, and in the case of backflow out of the melting gasifier via the dust burner, which likewise cannot be recognised in this representation, oxygen can reach the region of the flame guard 13. Through a supply line 14, combustible gas passes via an aperture through the flame guard 13 and can be led into the dust conveyor tube 3, the flow direction of the fuel-gas being discernible from the arrows.
In addition, an ignition device 15 is present which can be configured for example as a heat plug or a spark generator. If oxygen now reaches the region of the flame guard 13, the fuel-gas is ignited with the aid of the ignition device 15 and, in this example by means of an optical monitoring system 16, it is determined whether oxygen is located in the dust conveyor tube 3 or not. To protect the optlcal monitoring system 16, a protective glass 17 in front of a lens system 18, which focuses the light which may be detected during ignition onto a photocell 19, can be arranged in front of the latter.
As well as the optical monitoring of the flame guard 13, there is also the possibility of using a corresponding acoustic sensor or a temperature sensor.
.
The invention relates to a method of monitoring the operation of a device for feeding an abrasive medium, especially of a dust-recycling system, into a melting gasifier, the dust extracted from a melting gasifier or reduction shaft furnace being introduced by means of a fluid via a dust conveyor tube through at least one dust burner into the melting gasifier as an additional carbon carrier. The method can also, however, be used for the feeding of abrasive media by means of fluid injection into other melting or incineration plants, such as e.g. fluid bed reactors.
From DE 40 41 936 C1 is known a way of feeding the gases, of deposited hot dusts, streaming out of melting gasifiers or reduction shaft furnaces, back into the process of a melting gasifier. In this process, an injector is used in order to pass the dust which is to be recycled via a dust conveyor tube and via at least one dust burner back into the melting gasifier.
During operation, under the known severe conditions for melting gasifiers, hot gases or unburned oxygen can flow back into the dust recycling system. In such a case, there exists the very great danger that plant ,, ~ .. ... "
components can be damaged or destroyed as a result of an explosion.
It is therefore the purpose of the invention to detect such a state as soon as possible and reliably to prevent any threat being caused by gases flowing back into the dust recycling system.
According to the invention, this purpose is fulfilled by the features contained in claim 1. Advantageous embodiments and developments of the invention arise with the exploitation of the features mentioned in the subordinate claims.
Through detecting the flow direction in the conveyor tube of a dust recycling system, the returned dust being the abrasive medium and being used as an additional carbon carrier in the melting gasifier, it is possible in a simple and reliable way to determine whether any undesired backflow of gases is occurring and a corresponding scenario can be initiated which reliably prevents a threat such as already mentioned (explosion) from occurring.
A favourable possibility for this consists in monitoring simultaneously the pressure in the melting gasifier and in the dust conveyor tube. If a rise in pressure in the dust conveyor tube is detected, in the case where there is no corresponding rise in pressure in the melting gasifier, it can be clearly inferred than an undesired operating situation has been reached which can pose a threat to the system. With such a measuring result, in this case it can be inferred that hot gas or oxygen has penetrated into the dust conveying system of the dust-recycling system and this must be reacted to appropriately in order to overcome a state of danger.
A particularly advantageous way of determining the flow direction in the dust conveyor tube consists in the fact that at least two measuring channels are led through the wall of the dust conveyor tube, the angles of inclination of these measuring channels being different in relation to the longitudinal axis of the dust conveyor tube in the measuring plane. A measuring channel can here be inclined orthogonally to the longitudinal axis of the dust conveyor tube and the second measuring channel can be inclined at an acute angle to this axis.
As is also the case with other measuring methods which are based on the principle of fluid dynamics, it has an advantageous effect, in order to prevent blocking of the measuring channel apertures, if a fluid is led through said apertures into the conveying flow.
_ . . ~
Nitrogen suggests itself in particular as such a measurement fluid since nitrogen, as a known inert gas, cannot lead to any threat in the dust-recycling system.
As a result of the differing inclination of the measuring channels in relation to the longitudinal axis of the dust conveyor tube, the pressures in both measuring channels - with the exception of the operating point which is defined by the zero crossing or null balance - always differ, the pressure difference being - under otherwise identical conditions - a measurement for the flow velocity in the conveyor tube. If expediently a null balance is carried out for the current-free state, a reversal of the flow direction can be directly inferred from a change of sign of the pressure difference, which reversal is a pre-requisite for the feared case of a backflow of hot flame gases or oxygen into a dust conveyor tube. The proposed arrangement of the measuring channels can, however, be adapted to different conditions by other variants, especially different selected angles of incllnation, of the measuring channels whose pressure values are to be compared with one another.
A further possible way of monitoring the backflow of oxygen into the dust-recycling system consists in the fact that a flame guard is led through the wall of the dust conveyor tube. In this process, problems must be taken into account which can occur through possible blockages caused by dust. Negative effects which occur from harmful components (e.g. H2S) in the conveyor flow must likewise be taken into account. The flame guard has a fuel-gas supply and an ignition device which can for example be configured as a heat plug or a spark generator. If oxygen penetrates via the aperture of the dust burner into the dust conveyor tube and reaches the flame guard, the ignition of the combustible gas mixture occurs and this can be detected via optical or acoustic sensors or via a measurement of temperature.
The invention is to be described in more detail below with the aid of embodiments, given by way of example.
Here the figures show:
Fig. 1 a block diagram of the application of a fluid dynamic measurement principle with two measuring channels;
Fig. 2 variants for possible measuring channel arrangements and Fig. 3 the monitoring of a dust conveyor tube by means of a flame guard.
In the principle of a pressure difference measurement shown in Fig. 1, this measurement is carried out in two measuring channels 1 and 2. The measuring channels 1 and 2 are here configured as bores which are led through the wall of the dust conveyor tube 3. The measuring channel 1 is here inclined orthogonally to the longitudinal axis of the dust conveyor tube 3 and the measuring channel 2 is inclined at an acute angle to same. The arrow Vc drawn in Fig. 1 indicates the direction in which a danger situation can occur, i.e.
hot gases or oxygen flow back into the system. In principle, a reverse arrangement of the probes in relation to the flow direction can also be used.
Nitrogen is fed into the measuring channels 1 and 2 via a supply line 4. The volume flow of the nitrogen which is led into the measuring channels 1 and 2 is kept constant by means of a control system. For this purpose, volume flow sensors 5 and 6 with control valves 7 and 8 are present. For the supply of the measurement fluid (nitrogen), a further valve 9 is present in conjunction with a pressure sensor 10.
As well as the measurement of the pressure difference in the measuring channels 1 and 2, the absolute pressure in the dust conveyor tube 3 is monitored by means of a further pressure sensor 11.
The pressure difference in the measuring channels 1 and 2 is measured by means of pressure sensor 12. The pressure difference detected is a measurement for the flow velocity in the conveyor tube. If a null balance ... . .
is carried out for the current-free state, it is possible with the aid of a change of sign of the pressure difference to detect that backflow into the dust conveyor tube 3 has taken place and a corresponding signal can be generated in order to shut off the supply of oxygen. The suitable shut-off mechanism for this purpose is not shown in this illustration.
Through the fact that the absolute setting values for the two measurement fluid flows through the measuring channels 1 and 2 can be favourably chosen with regard to the required measuring sensitivity and the measuring range for the measurement of the pressure difference, an optimum region suitable for monitoring can be set without problem. Via the setting of the ratio of the measurement fluid flows, a null balance of the pressure difference can be carried out moreover.
Through the parallel injection of the measurement fluid via the two measuring channels 1 and 2 and the measurement of the difference in pressure between these two measuring channels, the measured value is practically independent of the static pressure and is only affected directly by the static pressure (namely via the density) of the gas used. Through the slight inclination of the measuring channels transversely to the flow direction (bore in the wall of the dust conveyor tube 3), the ideal Bernouilli measurement principle Pd~ = Ptotal ~ Pstat cannot be realised and a corresponding measurement arrangement must be calibrated.
From Fig. 2 can be taken altogether six different possible arrangements of respectively two measuring channels. Here the arrangements shown in the upper row are so chosen that the corresponding apertures of the respective measuring channels are disposed at one point in the dust conveyor tube 3.
However, there also exists the possibility of arranging the measuring apertures of the measuring channels in different places, as can be seen from the lower row of Fig. 2. If the latter arrangement is chosen, what must be considered is that an increased time constant, which is determined by the spacing of the measurement apertures, must be taken into account when the difference in pressure between the measuring channels 1 and 2 is measured directly.
Moreover, when the version which has the measuring channels in one point is used, under certain circumstances a significantly higher measuring sensitivity can be achieved than with the version with separate measuring points.
From Fig. 3 can be taken a further example of an embodiment of a monitoring system configured according to the invention in which a flame guard 13 is used.
The flame guard 13 is here led at least partially through the wall of the dust conveyor tube 3, and in the case of backflow out of the melting gasifier via the dust burner, which likewise cannot be recognised in this representation, oxygen can reach the region of the flame guard 13. Through a supply line 14, combustible gas passes via an aperture through the flame guard 13 and can be led into the dust conveyor tube 3, the flow direction of the fuel-gas being discernible from the arrows.
In addition, an ignition device 15 is present which can be configured for example as a heat plug or a spark generator. If oxygen now reaches the region of the flame guard 13, the fuel-gas is ignited with the aid of the ignition device 15 and, in this example by means of an optical monitoring system 16, it is determined whether oxygen is located in the dust conveyor tube 3 or not. To protect the optlcal monitoring system 16, a protective glass 17 in front of a lens system 18, which focuses the light which may be detected during ignition onto a photocell 19, can be arranged in front of the latter.
As well as the optical monitoring of the flame guard 13, there is also the possibility of using a corresponding acoustic sensor or a temperature sensor.
.
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Method of monitoring the operation of a device for feeding an abrasive medium using fluid as conveying medium via at least one burner into a melting gasifier, in which in the conveyor tube of the feed system, downstream of the at least one burner, as seen from the melting gasifier, the flow direction of the fluid flow is measured for evidence of hot gases or oxygen streaming into the feed system from the melting gasifier, and when oxygen is found to have penetrated, the supply is shut off, characterised in that the gas pressures in the melting gasifier and in the conveyor tube (3) are measured downstream of the at least one burner, as seen from the melting gasifier, and where a rise is detected in the pressure in the conveyor tube (3) without a simultaneous rise in pressure being detected in the melting gasifier, a switch signal is generated.
2. Method of monitoring the operation of a device for feeding an abrasive medium using fluid as conveying medium via at least one burner into a melting gasifier, in which in the conveyor tube of the feed system, the flow direction of the fluid flow is measured downstream of the at least one burner, as seen from the melting gasifier, for evidence of hot gases or oxygen flowing into the supply system from the melting gasifier, and when oxygen is found to have penetrated, the supply is shut off, characterised in that a pressure measurement is carried out in at least two measuring channels (1, 2), which are aligned with different angles of inclination in relation to the axial direction of the conveyor tube (3).
3. Method according to claim 2, characterised in that a measurement fluid, in a small amount in relation to the conveying flow, is injected into the latter through the measuring channels (1, 2).
4. Method according to claim 3, characterised in that the volume flow of the measurement fluid is kept constant in both measuring channels (1, 2).
5. Method according to claim 3 or 4, characterised in that an inert gas is used as the measurement fluid.
6. Method according to claim 5, characterised in that nitrogen is used.
7. Method of monitoring the operation of a device for feeding an abrasive medium using a fluid as conveying means via at least one burner into a melting gasifier, in which in the conveyor tube of the feed system, the flow direction of the fluid flow is measured downstream of the at least one burner, as seen from the fusion vaporizer plant, for evidence of hot gases or oxygen flowing back into the feed system from the melting gasifier, and where oxygen is found to have penetrated, the supply is shut off, characterised in that a flame guard (13) arranged in the conveyor tube (3) is monitored optically or acoustically.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1996138346 DE19638346C1 (en) | 1996-09-19 | 1996-09-19 | Method for monitoring the operation of a device for supplying an abrasive medium with the aid of a fluid |
| DE19638346.3 | 1996-09-19 | ||
| PCT/DE1997/001966 WO1998012357A1 (en) | 1996-09-19 | 1997-09-02 | Process for monitoring the operation of a device for feeding an abrasive medium by means of a fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2266328A1 true CA2266328A1 (en) | 1998-03-26 |
Family
ID=7806197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2266328 Abandoned CA2266328A1 (en) | 1996-09-19 | 1997-09-02 | Process for monitoring the operation of a device for feeding an abrasive medium by means of a fluid |
Country Status (16)
| Country | Link |
|---|---|
| EP (1) | EP0951570A1 (en) |
| JP (1) | JP2001501729A (en) |
| KR (1) | KR20000036213A (en) |
| CN (1) | CN1230999A (en) |
| AT (1) | ATA909097A (en) |
| AU (1) | AU723335B2 (en) |
| BR (1) | BR9711402A (en) |
| CA (1) | CA2266328A1 (en) |
| DE (1) | DE19638346C1 (en) |
| ID (1) | ID18315A (en) |
| PL (1) | PL332239A1 (en) |
| SK (1) | SK35799A3 (en) |
| TR (1) | TR199900608T2 (en) |
| TW (1) | TW350877B (en) |
| WO (1) | WO1998012357A1 (en) |
| ZA (1) | ZA977132B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008059930A1 (en) * | 2008-12-02 | 2010-06-10 | Uhde Gmbh | Apparatus and method for catalytic gas phase reactions and their use |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4114144A (en) * | 1976-08-12 | 1978-09-12 | Imed Corporation | Automatic air-in-line fluid detector |
| AT388388B (en) * | 1983-11-24 | 1989-06-12 | Voest Alpine Ag | METHOD AND DEVICE FOR MELTING IRON IN A MELT-UP CARBURETTOR |
| US4624684A (en) * | 1985-09-03 | 1986-11-25 | Texaco Inc. | Process for feeding and gasifying solid carbonaceous fuel |
| DE3603894A1 (en) * | 1986-02-05 | 1987-08-06 | Korf Engineering Gmbh | METHOD FOR PRODUCING LIQUID PIPE IRON OR STEEL PRE-MATERIAL |
| DE3637537A1 (en) * | 1986-11-04 | 1988-05-05 | Vdo Schindling | DEVICE FOR DETERMINING THE FLOW DIRECTION |
| DE4041936C1 (en) * | 1990-12-27 | 1992-09-24 | Deutsche Voest-Alpine Industrieanlagenbau Gmbh, 4000 Duesseldorf, De | |
| JPH06335628A (en) * | 1993-05-31 | 1994-12-06 | Mitsubishi Heavy Ind Ltd | Powder feeder |
-
1996
- 1996-09-19 DE DE1996138346 patent/DE19638346C1/en not_active Expired - Fee Related
-
1997
- 1997-08-11 ZA ZA9707132A patent/ZA977132B/en unknown
- 1997-09-02 CA CA 2266328 patent/CA2266328A1/en not_active Abandoned
- 1997-09-02 CN CN97198032A patent/CN1230999A/en active Pending
- 1997-09-02 BR BR9711402A patent/BR9711402A/en not_active Application Discontinuation
- 1997-09-02 PL PL33223997A patent/PL332239A1/en unknown
- 1997-09-02 JP JP51415898A patent/JP2001501729A/en active Pending
- 1997-09-02 EP EP97942797A patent/EP0951570A1/en not_active Withdrawn
- 1997-09-02 KR KR1019997002274A patent/KR20000036213A/en not_active Application Discontinuation
- 1997-09-02 TW TW086112619A patent/TW350877B/en active
- 1997-09-02 AU AU44506/97A patent/AU723335B2/en not_active Ceased
- 1997-09-02 AT AT909097A patent/ATA909097A/en not_active Application Discontinuation
- 1997-09-02 WO PCT/DE1997/001966 patent/WO1998012357A1/en not_active Application Discontinuation
- 1997-09-02 SK SK357-99A patent/SK35799A3/en unknown
- 1997-09-02 TR TR1999/00608T patent/TR199900608T2/en unknown
- 1997-09-19 ID ID973244A patent/ID18315A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| SK35799A3 (en) | 2000-02-14 |
| ID18315A (en) | 1998-03-26 |
| BR9711402A (en) | 1999-08-17 |
| AU723335B2 (en) | 2000-08-24 |
| KR20000036213A (en) | 2000-06-26 |
| TR199900608T2 (en) | 1999-07-21 |
| ZA977132B (en) | 1998-02-20 |
| WO1998012357A1 (en) | 1998-03-26 |
| PL332239A1 (en) | 1999-08-30 |
| DE19638346C1 (en) | 1998-02-12 |
| TW350877B (en) | 1999-01-21 |
| AU4450697A (en) | 1998-04-14 |
| EP0951570A1 (en) | 1999-10-27 |
| CN1230999A (en) | 1999-10-06 |
| JP2001501729A (en) | 2001-02-06 |
| ATA909097A (en) | 2001-05-15 |
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| Date | Code | Title | Description |
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| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 20010904 |