CA2746615C - Device for continuously preheating a mixture of burnable gas, more particularly natural gas and oxygen - Google Patents
Device for continuously preheating a mixture of burnable gas, more particularly natural gas and oxygen Download PDFInfo
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- CA2746615C CA2746615C CA2746615A CA2746615A CA2746615C CA 2746615 C CA2746615 C CA 2746615C CA 2746615 A CA2746615 A CA 2746615A CA 2746615 A CA2746615 A CA 2746615A CA 2746615 C CA2746615 C CA 2746615C
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- gas
- diffuser
- mixing chamber
- mixture
- natural gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C13/00—Apparatus in which combustion takes place in the presence of catalytic material
- F23C13/02—Apparatus in which combustion takes place in the presence of catalytic material characterised by arrangements for starting the operation, e.g. for heating the catalytic material to operating temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
- F23D14/64—Mixing devices; Mixing tubes with injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/66—Preheating the combustion air or gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
- F23N1/027—Regulating fuel supply conjointly with air supply using mechanical means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2221/00—Pretreatment or prehandling
- F23N2221/06—Preheating gaseous fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2221/00—Pretreatment or prehandling
- F23N2221/08—Preheating the air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/08—Measuring temperature
- F23N2225/20—Measuring temperature entrant temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2237/00—Controlling
- F23N2237/20—Controlling one or more bypass conduits
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Gas Burners (AREA)
- Devices For Medical Bathing And Washing (AREA)
Abstract
The invention relates to a device for continuously preheating a mixture of burnable gas, particularly natural gas and oxygen, prior to the catalytic combustion thereof, wherein the combustion heat thereof can be used to heat fed-out natural gas, before or after the expansion thereof and supply to consumers, in order to compensate for the Joule-Thomson effect. The device is designed as a jet pump having a propelling nozzle and a diffuser aligned therewith. The propelling nozzle is the inlet for the mixture into a mixing chamber disposed in the pump housing, a suction line for the natural gas heated by means of catalytic combustion being connected to said chamber. The diffuser is part of an outlet of the mixing chamber of the jet pump. The propelling nozzle and the diffuser are disposed such that they can be moved relative to one another in the pump housing. An adjusting mechanism is provided for adjusting the distance between the propelling nozzle and the diffuser as a function of the temperature of the gas mixture flowing out of the mixing chamber through the outlet.
Description
DEVICE FOR CONTINUOUSLY PREHEATING A MIXTURE OF BURNABLE
GAS, MORE PARTICULARLY NATURAL GAS AND OXYGEN
The invention relates to a device for continuously preheating a mixture of burnable gas, more particularly natural gas and oxygen prior to the catalytic combustion thereof, wherein its combustion heat can be used to heat fed-out natural gas before or after the expansion thereof and supply to consumers, in order to compensate for the Joule-Thomson effect.
A device of the above type is known from EP 0 920 578.
In the method implemented with the known device, through the catalytic conversion of oxygen with natural gas in the strongly substoichiometric mixing range on the catalyst, directly in the gas flow, temperatures of up to 4.00 C are attained.
In principle, self-ignition can never be entirely ruled out when directly adding oxygen to burnable gases. However, by selecting the pressure, temperature and concentration parameters the risk of undesirable self-ignition can be reduced.
Catalytic combustion requires a catalyst activation temperature of around 180 Celsius Co 250 Celsius. The preheating of natural gas-oxygen mixtures to this catalyst activation temperature cannot be technically implemented before expansion in relation to self-ignition at the prevailing high pressures. Safe feeding out of the natural gas is not possible.
The self-ignition of natural gas-oxygen mixtures is pressure and temperature dependent, so that an increase in oxygen concentration already leads to combustion in the gas
GAS, MORE PARTICULARLY NATURAL GAS AND OXYGEN
The invention relates to a device for continuously preheating a mixture of burnable gas, more particularly natural gas and oxygen prior to the catalytic combustion thereof, wherein its combustion heat can be used to heat fed-out natural gas before or after the expansion thereof and supply to consumers, in order to compensate for the Joule-Thomson effect.
A device of the above type is known from EP 0 920 578.
In the method implemented with the known device, through the catalytic conversion of oxygen with natural gas in the strongly substoichiometric mixing range on the catalyst, directly in the gas flow, temperatures of up to 4.00 C are attained.
In principle, self-ignition can never be entirely ruled out when directly adding oxygen to burnable gases. However, by selecting the pressure, temperature and concentration parameters the risk of undesirable self-ignition can be reduced.
Catalytic combustion requires a catalyst activation temperature of around 180 Celsius Co 250 Celsius. The preheating of natural gas-oxygen mixtures to this catalyst activation temperature cannot be technically implemented before expansion in relation to self-ignition at the prevailing high pressures. Safe feeding out of the natural gas is not possible.
The self-ignition of natural gas-oxygen mixtures is pressure and temperature dependent, so that an increase in oxygen concentration already leads to combustion in the gas
- 2 -flow and thereby to an increase in pressure and temperature even without catalyst. This is a disadvantage as the combustion process cannot then be controlled.
Before entering the catalytic reactor the fed-out natural gas-oxygen mixture is at a temperature of around 5 Celsius to 30 Celsius so that it is quite cold and far below the required activation temperature range. The required combustion process therefore becomes imbalanced after only a short time. Below the activation temperature the reactor is "cold blown" and the oxygen remains in the natural gas without having been converted.
The aim of the invention is to provide a device which allows safe preheating, and thereby a stable process of catalytic conversion of oxygen and natural gas.
The present invention provides a device for continuously preheating a mixture of burnable gas, wherein the combustion heat thereof can be used to heat fed-out gas, before or after its expansion and supply to consumers, in order to compensate for the Joule-Thomson effect;
wherein the device is designed as a jet pump with a propelling nozzle and a diffuser aligned therewith and a pump housing;
wherein the propelling nozzle is an inlet for the mixture into a mixing chamber disposed in the pump housing;
wherein a suction line for the gas heated by means of the catalytic combustion is connected to the mixing chamber;
wherein the diffuser is part of an outlet of the mixing chamber of the jet pump;
- 2a -wherein the propelling nozzle and the diffuser are arranged in the pump housing such that they can move relative to each other; and wherein an adjusting mechanism automatically adjusts the distance between the propelling nozzle and the diffuser as a function of the temperature of the gas mixture flowing out the mixing chamber through the outlet, such that the temperature of the gas mixture leaving the mixing chamber is continuously regulated.
The adjusting mechanism can comprise at least one operating cylinder supported on the pump housing, the piston rod of which can be pivoted on the diffuser which can be adjustably displaced along a guide. Each operating cylinder can have a return spring. The diffuser can be a hollow cylindrical component which is disposed on the outlet designed as guide of a pipe emerging from the mixing chamber and pump housing for the outlet of the preheated gas mixture.
Each operating cylinder can have a connection for the supply of pressure medium controlled by a control and regulating device. For the supply of pressure medium, a branch line can be provided which branches off from a main line for fed-out natural gas.
According to the invention the device is designed as a jet pump, the function of which is to supply to the fed-out cold natural gas flow, which is at temperatures of 5 Celsius to 30 Celsius, warm natural gas from the reactor, exhibiting temperatures of 250 Celsius to 400 Celsius through generating an underpressure in the mixing chamber of the jet pump. This inlet function is particularly preferably - 2b -temperature-regulated and means that the catalyser is not blow out of the active temperature of at least 180 Celsius for the following reaction between natural gas and oxygen.
This is guaranteed in that the propelling nozzle and the diffuser are arranged so as to be movable relative to each other in the pump housing, more particularly in its mixing chamber, whereby an adjusting mechanism ensures
Before entering the catalytic reactor the fed-out natural gas-oxygen mixture is at a temperature of around 5 Celsius to 30 Celsius so that it is quite cold and far below the required activation temperature range. The required combustion process therefore becomes imbalanced after only a short time. Below the activation temperature the reactor is "cold blown" and the oxygen remains in the natural gas without having been converted.
The aim of the invention is to provide a device which allows safe preheating, and thereby a stable process of catalytic conversion of oxygen and natural gas.
The present invention provides a device for continuously preheating a mixture of burnable gas, wherein the combustion heat thereof can be used to heat fed-out gas, before or after its expansion and supply to consumers, in order to compensate for the Joule-Thomson effect;
wherein the device is designed as a jet pump with a propelling nozzle and a diffuser aligned therewith and a pump housing;
wherein the propelling nozzle is an inlet for the mixture into a mixing chamber disposed in the pump housing;
wherein a suction line for the gas heated by means of the catalytic combustion is connected to the mixing chamber;
wherein the diffuser is part of an outlet of the mixing chamber of the jet pump;
- 2a -wherein the propelling nozzle and the diffuser are arranged in the pump housing such that they can move relative to each other; and wherein an adjusting mechanism automatically adjusts the distance between the propelling nozzle and the diffuser as a function of the temperature of the gas mixture flowing out the mixing chamber through the outlet, such that the temperature of the gas mixture leaving the mixing chamber is continuously regulated.
The adjusting mechanism can comprise at least one operating cylinder supported on the pump housing, the piston rod of which can be pivoted on the diffuser which can be adjustably displaced along a guide. Each operating cylinder can have a return spring. The diffuser can be a hollow cylindrical component which is disposed on the outlet designed as guide of a pipe emerging from the mixing chamber and pump housing for the outlet of the preheated gas mixture.
Each operating cylinder can have a connection for the supply of pressure medium controlled by a control and regulating device. For the supply of pressure medium, a branch line can be provided which branches off from a main line for fed-out natural gas.
According to the invention the device is designed as a jet pump, the function of which is to supply to the fed-out cold natural gas flow, which is at temperatures of 5 Celsius to 30 Celsius, warm natural gas from the reactor, exhibiting temperatures of 250 Celsius to 400 Celsius through generating an underpressure in the mixing chamber of the jet pump. This inlet function is particularly preferably - 2b -temperature-regulated and means that the catalyser is not blow out of the active temperature of at least 180 Celsius for the following reaction between natural gas and oxygen.
This is guaranteed in that the propelling nozzle and the diffuser are arranged so as to be movable relative to each other in the pump housing, more particularly in its mixing chamber, whereby an adjusting mechanism ensures
- 3 -temperature-dependent adjustment of the distance between the propelling nozzle and diffuser for the gas mixture to flow out of the mixing chamber.
As the adjusting mechanism has at least one operating cylinder supported on the housing with a piston rod arranged on the diffuser guided adjustably along a guide, the distance between the propelling nozzle and diffuser is changed.
Connected to the mixing chamber of the jet pump is a suction line, which draws natural gas already heated by the catalytic combustion process into the mixing chamber. The heated natural gas is at the required temperature of 250 Celsius to 400 Celsius and in the mixing chamber is swirled and mixed with the cold natural gas-oxygen mixture, whereby the mixture is heated to a predetermined desired temperature and finally flows out of the mixing chamber through the oUtiet as a preheated gas mixture,. This preheated gas mixture then again undergoes catalytic combustion, from which, as has already been described, a warm partial gas follow is continuously diverted via the suction line.
In accordance with an advantageous further development of the invention, the diffuser is a hollow cylindrical component, which is disposed in a longitudinally adjustable manner on the outlet of a pipe emerging from the mixing chamber and housing for emission of the now preheated gas mixture.
The longitudinal adjustability produces the adjustment path of the diffuser vis-a-vis the propelling nozzle, which is inserted in a stationary, i.e. fixed, manner into the housing.
= CA 02746615 2011-01-28
As the adjusting mechanism has at least one operating cylinder supported on the housing with a piston rod arranged on the diffuser guided adjustably along a guide, the distance between the propelling nozzle and diffuser is changed.
Connected to the mixing chamber of the jet pump is a suction line, which draws natural gas already heated by the catalytic combustion process into the mixing chamber. The heated natural gas is at the required temperature of 250 Celsius to 400 Celsius and in the mixing chamber is swirled and mixed with the cold natural gas-oxygen mixture, whereby the mixture is heated to a predetermined desired temperature and finally flows out of the mixing chamber through the oUtiet as a preheated gas mixture,. This preheated gas mixture then again undergoes catalytic combustion, from which, as has already been described, a warm partial gas follow is continuously diverted via the suction line.
In accordance with an advantageous further development of the invention, the diffuser is a hollow cylindrical component, which is disposed in a longitudinally adjustable manner on the outlet of a pipe emerging from the mixing chamber and housing for emission of the now preheated gas mixture.
The longitudinal adjustability produces the adjustment path of the diffuser vis-a-vis the propelling nozzle, which is inserted in a stationary, i.e. fixed, manner into the housing.
= CA 02746615 2011-01-28
- 4 -Via a control valve, which as a function -of the temperature of the gas mixture flowing through the outlet determined by meaSuring sensors, acts on three operating cylinders arranged around the circumference of the diffuser, the diffuser can be moved in a temperature-controlled manner in such a way that it can be moved towards or away from the propelling nozzle. The temperature of the gas mixture leaving the mixing chamber can thereby be continuously regulated.
By means of return springs built into the cylinder chambers of the operating cylinder, the pistons of the operating cylinder are always pressed back into the end position.
When the control valve is fully opened to operate the piston, the diffuser moves towards the propelling nozzle so that only relatively cold natural gas can reach the outlet of the device and the catalyst in order to deactivate and/or "cold blow" the latter.
The pressure medium used to control the diffuser is natural gas which is diverted from the main flow of natural gas to=
the heating reactor, namely before a corresponding control valve in the area of the inlet into the rector in which the catalytic combustion of the natural gas in order to heat it takes place. At this diversion point there is always sufficiently high pressure present to operate the pistons under the control of the control and regulating device.
Thegas which is used to control the pistons can through appropriate selection of clearances between the piston and cylinder wall also flow off into the mixing chamber of the device designed as a jet pump.
When the control valve is closed, such "leakage losses"
result in a pressure equalisation and through the built-in return spring in the cylinders the pistons are pressed back into their original position.
.-, 5 The device advantageously allows preheating of the gas mixture before it enters the reactor and also controlled "cold blowing" of the catalytic reactor in which heating of the entire- fed-out natural gas takes place, whereby ultimately through mixing in the gas mixture heated to 250 Celsius to 400 C Celsius with the heat released in the reactor to the fed-out natural gas flow, the latter is continuously heated in order to compensate for the Joule-Thomson effect that occurs during expansion.
The device also brings about an advantageous dilution of the oxygen-natural gas mixture in an area which is with certainty below the self-ignition level, which makes carrying out the catalytic combustion considerably safer.
Through the continuous adjustability of the distance between the propelling nozzle and the diffuser, controlled =
self-maintenance of the catalytic reaction with subsequent combustion of the natural gas-oxygen gas mixture is possible.
Additional drives, fans or suchlike are not necessary in the device in accordance with the invention as it is controlled by the available fed-out natural gas, i.e.
through its own medium.
An example of embodiment of the invention, which sets out further inventive features, is shown in the drawing.
Fig.1 shows a side view of the device in cross-section, and Fig, 2 shows the incorporation of the device into a process of utilising the combustion heat from the catalytic Combustion of a mixture of natural gas and oxygen in the form of a flow diagram.
Fig. 1 shows a side view of the device for continuously preheating a mixture of burnable gas, more particularly natural gas and oxygen, in cross-section.
The mixture of natural gas and oxygen is provided in a mixing container 18, which is not shown ,here in more detail, and flows at the corresponding high feed-out pressure into the device via inlet connection 1. The device is designed as a jet pump 2 which has a propelling nozzle 3 via which the supplied mixture of natural gas and oxygen is forced into a mixing chamber 5 located in the pump housing 4.
Connected to the mixing chamber is a suction line 6 via which the partial flow of the natural gas already heated in a reactor 15 can be drawn into the mixing chamber 5 when the propelling nozzle forces it into the diffuser 7 aligned opposite it.
The diffuser is hollow cylindrical component, which is disposed in a longitudinally adjustable manner on the outlet 8 of a pipe 9 emerging from the mixing chamber 5 and housing 4 for the outlet 10 of the gas mixture preheated in the mixing chamber 5.
The jet pump 2 has an adjusting mechanism for adjusting the distance between the propelling nozzle 3 and diffuser 7 as a function of the temperature of the gas mixture flowing out through the outlet of the mixing chamber 5. The adjusting mechanism comprises several operating cylinders arranged on the housing 4 of which only the visible operating cylinder 11 is shown here. The piston rod 12 of the operating cylinder 11 is attached to diffuser 7, which is adjustably moved along its guide on pipe 9, at pivot point 12.
Each operating cylinder 11 has a connection for the controlled supply of pressure medium by means of a control and regulating device, which is not shown in more detail here.
Fig. 2 shows a flow diagram and illustrates the arrangement of the device in accordance with fig. 1 within a device for heating fed-out natural gas before or after its expansion and introduction into a supply network. The fed-out natural gas flows via the main line 14 via a control valve into the ring chamber of the reactor 15 in which it is heated before it flows into a supply 'line 16. In the reactor 15combustion of a gas mixture of natural gas and a natural gas-oxygen mixture takes place.
The natural gas for the gas mixture for combustion is diverted from the main flow 14 via the partial flow line 17 and is enriched in the mixing container 18 with the oxygen necessary for attaining the required mixing ratio (e.g. 3 MO1 %). The mixture of natural gas and oxygen: enters the mixing chamber 5 via the propelling nozzle 3. In connection with the diffuser 7 an underpressure is generated in the mixing chamber 5 which draws warm natural gas from the reactor 15 via the suction line 6. This is mixed with the cold natural gas flow blown in via the propelling nozzle 3, and the thus heated/preheated mixture flow out of the mixing chamber 5 via the outlet 10 into the reactor 15. The catalytic combustion which takes place there releases heat with which the fed-out natural gas supplied via the main line 14 is heated through continuous mixing before, via line 16, it reaches a station where it is expanded, for example to a comparatively low pressure present in a supply line.
The adjusting mechanism for the diffuser 7 is indicated schematically here. The longitudinal displacement is indicated symbolically with the double arrow 19.
The drawn-in operating cylinders of the adjustment mechanism 11, 11' are supported on the pump housing 4. The piston rods 20 of the operating cylinders are, as shown here, pivotably connected to the diffuser 7 and 20 and 20' respectively.
21 and 21' denote return springs.
For the supply of pressure medium to the operating cylinders 11, 11' a branch 22 is provided which is connected at diversion point 23 to the main line 14 for fed-out natural gas.
A control and regulating device comprises a control valve 24 and a temperature sensor 25 which measures the temperature of the preheated gas mixture flowing into the reactor 15 via outlet 10 and acts on the control valve 24 in such a way that it opens further or closes, whereby more or less pressure medium is supplied to the operating cylinders via the branch line 22. This supply of pressure medium via the branch line 22 a temperature-dependent longitudinal displacement of the diffuser 7 on the pipe of outlet 10.
The suction effect of the jet pump can be increased further and/or influence by an additional conveying means 26.
By means of return springs built into the cylinder chambers of the operating cylinder, the pistons of the operating cylinder are always pressed back into the end position.
When the control valve is fully opened to operate the piston, the diffuser moves towards the propelling nozzle so that only relatively cold natural gas can reach the outlet of the device and the catalyst in order to deactivate and/or "cold blow" the latter.
The pressure medium used to control the diffuser is natural gas which is diverted from the main flow of natural gas to=
the heating reactor, namely before a corresponding control valve in the area of the inlet into the rector in which the catalytic combustion of the natural gas in order to heat it takes place. At this diversion point there is always sufficiently high pressure present to operate the pistons under the control of the control and regulating device.
Thegas which is used to control the pistons can through appropriate selection of clearances between the piston and cylinder wall also flow off into the mixing chamber of the device designed as a jet pump.
When the control valve is closed, such "leakage losses"
result in a pressure equalisation and through the built-in return spring in the cylinders the pistons are pressed back into their original position.
.-, 5 The device advantageously allows preheating of the gas mixture before it enters the reactor and also controlled "cold blowing" of the catalytic reactor in which heating of the entire- fed-out natural gas takes place, whereby ultimately through mixing in the gas mixture heated to 250 Celsius to 400 C Celsius with the heat released in the reactor to the fed-out natural gas flow, the latter is continuously heated in order to compensate for the Joule-Thomson effect that occurs during expansion.
The device also brings about an advantageous dilution of the oxygen-natural gas mixture in an area which is with certainty below the self-ignition level, which makes carrying out the catalytic combustion considerably safer.
Through the continuous adjustability of the distance between the propelling nozzle and the diffuser, controlled =
self-maintenance of the catalytic reaction with subsequent combustion of the natural gas-oxygen gas mixture is possible.
Additional drives, fans or suchlike are not necessary in the device in accordance with the invention as it is controlled by the available fed-out natural gas, i.e.
through its own medium.
An example of embodiment of the invention, which sets out further inventive features, is shown in the drawing.
Fig.1 shows a side view of the device in cross-section, and Fig, 2 shows the incorporation of the device into a process of utilising the combustion heat from the catalytic Combustion of a mixture of natural gas and oxygen in the form of a flow diagram.
Fig. 1 shows a side view of the device for continuously preheating a mixture of burnable gas, more particularly natural gas and oxygen, in cross-section.
The mixture of natural gas and oxygen is provided in a mixing container 18, which is not shown ,here in more detail, and flows at the corresponding high feed-out pressure into the device via inlet connection 1. The device is designed as a jet pump 2 which has a propelling nozzle 3 via which the supplied mixture of natural gas and oxygen is forced into a mixing chamber 5 located in the pump housing 4.
Connected to the mixing chamber is a suction line 6 via which the partial flow of the natural gas already heated in a reactor 15 can be drawn into the mixing chamber 5 when the propelling nozzle forces it into the diffuser 7 aligned opposite it.
The diffuser is hollow cylindrical component, which is disposed in a longitudinally adjustable manner on the outlet 8 of a pipe 9 emerging from the mixing chamber 5 and housing 4 for the outlet 10 of the gas mixture preheated in the mixing chamber 5.
The jet pump 2 has an adjusting mechanism for adjusting the distance between the propelling nozzle 3 and diffuser 7 as a function of the temperature of the gas mixture flowing out through the outlet of the mixing chamber 5. The adjusting mechanism comprises several operating cylinders arranged on the housing 4 of which only the visible operating cylinder 11 is shown here. The piston rod 12 of the operating cylinder 11 is attached to diffuser 7, which is adjustably moved along its guide on pipe 9, at pivot point 12.
Each operating cylinder 11 has a connection for the controlled supply of pressure medium by means of a control and regulating device, which is not shown in more detail here.
Fig. 2 shows a flow diagram and illustrates the arrangement of the device in accordance with fig. 1 within a device for heating fed-out natural gas before or after its expansion and introduction into a supply network. The fed-out natural gas flows via the main line 14 via a control valve into the ring chamber of the reactor 15 in which it is heated before it flows into a supply 'line 16. In the reactor 15combustion of a gas mixture of natural gas and a natural gas-oxygen mixture takes place.
The natural gas for the gas mixture for combustion is diverted from the main flow 14 via the partial flow line 17 and is enriched in the mixing container 18 with the oxygen necessary for attaining the required mixing ratio (e.g. 3 MO1 %). The mixture of natural gas and oxygen: enters the mixing chamber 5 via the propelling nozzle 3. In connection with the diffuser 7 an underpressure is generated in the mixing chamber 5 which draws warm natural gas from the reactor 15 via the suction line 6. This is mixed with the cold natural gas flow blown in via the propelling nozzle 3, and the thus heated/preheated mixture flow out of the mixing chamber 5 via the outlet 10 into the reactor 15. The catalytic combustion which takes place there releases heat with which the fed-out natural gas supplied via the main line 14 is heated through continuous mixing before, via line 16, it reaches a station where it is expanded, for example to a comparatively low pressure present in a supply line.
The adjusting mechanism for the diffuser 7 is indicated schematically here. The longitudinal displacement is indicated symbolically with the double arrow 19.
The drawn-in operating cylinders of the adjustment mechanism 11, 11' are supported on the pump housing 4. The piston rods 20 of the operating cylinders are, as shown here, pivotably connected to the diffuser 7 and 20 and 20' respectively.
21 and 21' denote return springs.
For the supply of pressure medium to the operating cylinders 11, 11' a branch 22 is provided which is connected at diversion point 23 to the main line 14 for fed-out natural gas.
A control and regulating device comprises a control valve 24 and a temperature sensor 25 which measures the temperature of the preheated gas mixture flowing into the reactor 15 via outlet 10 and acts on the control valve 24 in such a way that it opens further or closes, whereby more or less pressure medium is supplied to the operating cylinders via the branch line 22. This supply of pressure medium via the branch line 22 a temperature-dependent longitudinal displacement of the diffuser 7 on the pipe of outlet 10.
The suction effect of the jet pump can be increased further and/or influence by an additional conveying means 26.
Claims (7)
1. A device for continuously preheating a mixture of burnable gas, wherein the combustion heat thereof can be used to heat fed-out gas, before or after its expansion and supply to consumers, in order to compensate for the Joule-Thomson effect;
wherein the device is designed as a jet pump with a propelling nozzle and a diffuser aligned therewith and a pump housing;
wherein the propelling nozzle is an inlet for the mixture into a mixing chamber disposed in the pump housing;
wherein a suction line for the gas heated by means of the catalytic combustion is connected to the mixing chamber;
wherein the diffuser is part of an outlet of the mixing chamber of the jet pump;
wherein the propelling nozzle and the diffuser are arranged in the pump housing such that they can move relative to each other; and wherein an adjusting mechanism automatically adjusts the distance between the propelling nozzle and the diffuser as a function of the temperature of the gas mixture flowing out the mixing chamber through the outlet, such that the temperature of the gas mixture leaving the mixing chamber is continuously regulated.
wherein the device is designed as a jet pump with a propelling nozzle and a diffuser aligned therewith and a pump housing;
wherein the propelling nozzle is an inlet for the mixture into a mixing chamber disposed in the pump housing;
wherein a suction line for the gas heated by means of the catalytic combustion is connected to the mixing chamber;
wherein the diffuser is part of an outlet of the mixing chamber of the jet pump;
wherein the propelling nozzle and the diffuser are arranged in the pump housing such that they can move relative to each other; and wherein an adjusting mechanism automatically adjusts the distance between the propelling nozzle and the diffuser as a function of the temperature of the gas mixture flowing out the mixing chamber through the outlet, such that the temperature of the gas mixture leaving the mixing chamber is continuously regulated.
2. The device according to claim 1, wherein the mixture of burnable gas comprises natural gas and oxygen, and the fed-out gas is natural gas.
3. The device in accordance with claim 1 or 2, wherein the adjusting mechanism comprises at least one operating cylinder supported on the pump housing, a piston rod of which is pivoted on the diffuser which is adjustably displaced along a guide.
4. The device according to claim 3, wherein each operating cylinder has a return spring.
5. The device according to any one of claims 3 and 4, wherein each operating cylinder has a connection for the supply of pressure medium controlled by a control and regulating device.
6. The device according to claim 5, wherein for the supply of pressure medium a branch line is provided which branches off from a main line for fed-out gas.
7. The device according to any one of claims 1 to 6, wherein the diffuser is a hollow cylindrical component which is disposed on the outlet designed as guide of a pipe emerging from the mixing chamber and pump housing for the outlet of the preheated gas mixture.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008036270A DE102008036270A1 (en) | 2008-08-04 | 2008-08-04 | Apparatus for continuously preheating a mixture of fuel gas, in particular natural gas and oxygen |
| DE102008036270.0 | 2008-08-04 | ||
| PCT/DE2009/000667 WO2010015216A2 (en) | 2008-08-04 | 2009-05-12 | Device for continuously preheating a mixture of burnable gas, particularly natural gas and oxygen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2746615A1 CA2746615A1 (en) | 2010-02-11 |
| CA2746615C true CA2746615C (en) | 2016-04-05 |
Family
ID=41228268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2746615A Expired - Fee Related CA2746615C (en) | 2008-08-04 | 2009-05-12 | Device for continuously preheating a mixture of burnable gas, more particularly natural gas and oxygen |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US20110136068A1 (en) |
| EP (1) | EP2318762B1 (en) |
| CA (1) | CA2746615C (en) |
| DE (1) | DE102008036270A1 (en) |
| DK (1) | DK2318762T3 (en) |
| ES (1) | ES2411984T3 (en) |
| PL (1) | PL2318762T3 (en) |
| PT (1) | PT2318762E (en) |
| RU (1) | RU2474761C2 (en) |
| WO (1) | WO2010015216A2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103851622B (en) * | 2012-12-07 | 2016-08-31 | 青岛瑞迪燃气具制造有限公司 | A kind of gas premixing device and burner |
| DE102014004237A1 (en) * | 2014-01-20 | 2015-07-23 | Stiftung Universität Hildesheim | Device for generating an electric current |
| WO2020072393A1 (en) * | 2018-10-04 | 2020-04-09 | Harris George E | Jet pump |
| RU2702825C1 (en) * | 2019-05-16 | 2019-10-11 | Федеральное государственное унитарное предприятие "Центральный ордена Трудового Красного Знамени научно-исследовательский автомобильный и автомоторный институт "НАМИ" (ФГУП "НАМИ") | Device for heating compressed gas fuel in power plant |
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| US2472084A (en) * | 1945-10-10 | 1949-06-07 | Gen Aniline & Film Corp | Carburetor process for acetylene reactions |
| US3330773A (en) * | 1963-03-28 | 1967-07-11 | Du Pont | Process for preparing gaseous mixtures |
| US3846979A (en) * | 1971-12-17 | 1974-11-12 | Engelhard Min & Chem | Two stage combustion process |
| SE372620B (en) * | 1972-03-17 | 1974-12-23 | Atomenergi Ab | |
| US3934572A (en) * | 1973-04-02 | 1976-01-27 | Teague Jr Walter Dorwin | Infrared space heater |
| US3980422A (en) * | 1975-08-11 | 1976-09-14 | Hed Industries, Inc. | Oil injection means for liquid fuel burner |
| DE3605172A1 (en) * | 1986-02-19 | 1987-08-20 | Sueddeutsche Kalkstickstoff | METHOD FOR CONTROLLING THE CONTINUOUS DRAINAGE OF GAS FROM CLOSED REACTORS |
| US5003782A (en) * | 1990-07-06 | 1991-04-02 | Zoran Kucerija | Gas expander based power plant system |
| JP3200779B2 (en) * | 1992-11-10 | 2001-08-20 | 誠 西村 | Pulse burner for brazing metal |
| DE19633674C2 (en) * | 1996-08-21 | 1998-07-16 | Hamburger Gaswerke Gmbh | In-line gas preheating |
| US20020166324A1 (en) * | 1998-04-02 | 2002-11-14 | Capstone Turbine Corporation | Integrated turbine power generation system having low pressure supplemental catalytic reactor |
| FR2833863B1 (en) * | 2001-12-20 | 2004-08-20 | Air Liquide | CATALYTIC REACTOR, CORRESPONDING INSTALLATION AND REACTION METHOD |
| RU26108U1 (en) * | 2002-06-25 | 2002-11-10 | Фролов Александр Викторович | GAS-BURNER |
| US7617682B2 (en) * | 2002-12-13 | 2009-11-17 | Siemens Energy, Inc. | Catalytic oxidation element for a gas turbine engine |
| US6829896B2 (en) * | 2002-12-13 | 2004-12-14 | Siemens Westinghouse Power Corporation | Catalytic oxidation module for a gas turbine engine |
| US7108838B2 (en) * | 2003-10-30 | 2006-09-19 | Conocophillips Company | Feed mixer for a partial oxidation reactor |
| US7096667B2 (en) * | 2004-01-09 | 2006-08-29 | Siemens Power Generation, Inc. | Control of gas turbine for catalyst activation |
| US6966769B2 (en) * | 2004-04-05 | 2005-11-22 | The Boeing Company | Gaseous oxygen resonance igniter |
| US7104787B2 (en) * | 2004-05-06 | 2006-09-12 | Eclipse, Inc. | Apparatus for radiant tube exhaust gas entrainment |
| DE102004054587B3 (en) * | 2004-11-11 | 2006-05-18 | Siemens Ag | Production method e.g. for reproducible micro drillings, having micro drilled hole with diameter of maximally 110micro m and aspect relationship of least 10 with drilling provided by electro-chemical process |
| US8070840B2 (en) * | 2005-04-22 | 2011-12-06 | Shell Oil Company | Treatment of gas from an in situ conversion process |
| US7575613B2 (en) * | 2005-05-26 | 2009-08-18 | Arizona Public Service Company | Method and apparatus for producing methane from carbonaceous material |
| EP1865249B1 (en) * | 2006-06-07 | 2014-02-26 | 2Oc | A gas pressure reducer, and an energy generation and management system including a gas pressure reducer |
| US8061413B2 (en) * | 2007-09-13 | 2011-11-22 | Battelle Energy Alliance, Llc | Heat exchangers comprising at least one porous member positioned within a casing |
-
2008
- 2008-08-04 DE DE102008036270A patent/DE102008036270A1/en not_active Withdrawn
-
2009
- 2009-05-12 RU RU2011103868/06A patent/RU2474761C2/en not_active IP Right Cessation
- 2009-05-12 PT PT97758726T patent/PT2318762E/en unknown
- 2009-05-12 PL PL09775872T patent/PL2318762T3/en unknown
- 2009-05-12 US US12/737,591 patent/US20110136068A1/en not_active Abandoned
- 2009-05-12 EP EP09775872A patent/EP2318762B1/en not_active Not-in-force
- 2009-05-12 DK DK09775872.6T patent/DK2318762T3/en active
- 2009-05-12 CA CA2746615A patent/CA2746615C/en not_active Expired - Fee Related
- 2009-05-12 WO PCT/DE2009/000667 patent/WO2010015216A2/en active Application Filing
- 2009-05-12 ES ES09775872T patent/ES2411984T3/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE102008036270A1 (en) | 2010-02-11 |
| EP2318762A2 (en) | 2011-05-11 |
| EP2318762B1 (en) | 2013-02-27 |
| ES2411984T3 (en) | 2013-07-09 |
| WO2010015216A3 (en) | 2011-05-05 |
| PL2318762T3 (en) | 2013-09-30 |
| CA2746615A1 (en) | 2010-02-11 |
| RU2011103868A (en) | 2012-09-10 |
| US20110136068A1 (en) | 2011-06-09 |
| DK2318762T3 (en) | 2013-06-03 |
| RU2474761C2 (en) | 2013-02-10 |
| PT2318762E (en) | 2013-06-04 |
| WO2010015216A2 (en) | 2010-02-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20140410 |
|
| MKLA | Lapsed |
Effective date: 20180514 |