CA2238096C - A method and a device for recovery of energy from media containing combustible substances even at low concentration - Google Patents
A method and a device for recovery of energy from media containing combustible substances even at low concentration Download PDFInfo
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- CA2238096C CA2238096C CA002238096A CA2238096A CA2238096C CA 2238096 C CA2238096 C CA 2238096C CA 002238096 A CA002238096 A CA 002238096A CA 2238096 A CA2238096 A CA 2238096A CA 2238096 C CA2238096 C CA 2238096C
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
- F23G7/065—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel
- F23G7/066—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator
- F23G7/068—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator using regenerative heat recovery means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
- Incineration Of Waste (AREA)
Abstract
The invention relates to a method and device for recovery of energy from a medium containing combustible substances even at low concentrations. The method is characterized by raising the temperature of th e medium in a regenerative combustor (8), i.e. a reversal flow direction combustion device wherein the combustion takes place in a warm zon e, to the combustion temperature at which essentially all chemical energy of the combustible substances is transformed into thermal energy. The heated medium is then utilized for the production of a wanted form of energy.
Description
A METHOD AND A DEVICE FOR RECOVERY OF ENERGY FROM
MEDIA CONTAINING COMBUSTIBLE SUBSTANCES EVEN AT LOW
CONCENTRATION
The subject invention relates generally to a method and a device for recovery of energy from media containing combustible substances even at low-concentrations, and more particularly to energy recovery in connection with the purification of said media by combustion of the combustible substances.
It is already known to purify exhaust fumes emanating for in-stance from painting and printing works and containing combustible substances, such as solvents, by heating the fumes up to the tem-perature of combustion of the combustible substances. However, this is an expensive process on account of the need to heat the entire flow of the exhaust medium. Owing to a "combustion exchanger", one em-bodiment of which is described for instance in connection with an ab-sorbtion technique in the Swedish Patent Specification 8903556-2, it is possible to reduce the costs associated with heating the exhaust fumes. In said Patent Specification the combustion exchanger is de-fined as an apparatus comprising a heat-accumulating bed which may be heated up to the spontaneous combustion temperature of the combustible substances and in which bed the combustible sub-stances, by reversing their direction of flow, attribute to sustaining the spontaneous combustion temperature inside the bed. An appara-tus of this type is described also in e.g. US-A-4,741,690. When certain amounts of the combustible substances are present in the medium the heating of the medium inside the combustion exchanger may take place by the energy released from the spontaneous combustion of the substances inside the bed. Supplementary heating thus becomes nec-essary only to heat the bed to the spontaneous combustion tempera-ture when the plant is being started up or when the quantity of com-bustible substances is very small and insufficient to independently sustain the spontaneous combustion temperature inside the bed.
MEDIA CONTAINING COMBUSTIBLE SUBSTANCES EVEN AT LOW
CONCENTRATION
The subject invention relates generally to a method and a device for recovery of energy from media containing combustible substances even at low-concentrations, and more particularly to energy recovery in connection with the purification of said media by combustion of the combustible substances.
It is already known to purify exhaust fumes emanating for in-stance from painting and printing works and containing combustible substances, such as solvents, by heating the fumes up to the tem-perature of combustion of the combustible substances. However, this is an expensive process on account of the need to heat the entire flow of the exhaust medium. Owing to a "combustion exchanger", one em-bodiment of which is described for instance in connection with an ab-sorbtion technique in the Swedish Patent Specification 8903556-2, it is possible to reduce the costs associated with heating the exhaust fumes. In said Patent Specification the combustion exchanger is de-fined as an apparatus comprising a heat-accumulating bed which may be heated up to the spontaneous combustion temperature of the combustible substances and in which bed the combustible sub-stances, by reversing their direction of flow, attribute to sustaining the spontaneous combustion temperature inside the bed. An appara-tus of this type is described also in e.g. US-A-4,741,690. When certain amounts of the combustible substances are present in the medium the heating of the medium inside the combustion exchanger may take place by the energy released from the spontaneous combustion of the substances inside the bed. Supplementary heating thus becomes nec-essary only to heat the bed to the spontaneous combustion tempera-ture when the plant is being started up or when the quantity of com-bustible substances is very small and insufficient to independently sustain the spontaneous combustion temperature inside the bed.
Owing to the high efficiency of the combustion exchanger it is, however, comparatively rare that the amount of combustible sub-stances in the medium is insufficient, as in the latter case mentioned above. Thus, the amount of combustible substances usually is in excess of the amount required to sustain the spontaneous combus-tion temperature inside the bed. This leads to an increase of the heat in the bed, which in turn results in an increased demand for cooling of the bed in order to avoid damages thereto and to the surrounding area. In addition, the fact that the thermal energy developed in the combustion is not recovered is a problem as such, considering the high energy costs and environmenal aspects.
One purpose of the subject invention therefore is to provide a method and an apparatus allowing the surplus of thermal energy gen-erated in the combustion in a regenerative combustor, i.e. a reversal flow direction combustion device wherein the combustion takes place in a warm zone, which preferably is a combustion exhanger, to be made use of.
Another purpose of the method and the apparatus according to the invention is to provide not only energy recovery but jointly therewith control of the temperature'in the regenerative combustor.
Another purpose of the method and the apparatus according to the invention is to eliminate toxic or climate-endagering or malodor-ous substances by burning them.
Yet another purpose of the invention is to recover, from the re-generative combustor, thermal energy of such a quality that it may be used primarily for high temperature output, for instance in the pro-duction of electricity.
These and other purposes are achieved in accordance with the invention by means of a method andan apparatus defined in the characterizing clauses of the appended claims.
One embodiment of the subject invention will be described in closer detail in the following with reference to the accompanying drawings, wherein:
Fig. 1 schematically in a view from above illustrates an appara-tus in accordance with the invention for purification of exhaust or ventilation air from a coal mine.
One purpose of the subject invention therefore is to provide a method and an apparatus allowing the surplus of thermal energy gen-erated in the combustion in a regenerative combustor, i.e. a reversal flow direction combustion device wherein the combustion takes place in a warm zone, which preferably is a combustion exhanger, to be made use of.
Another purpose of the method and the apparatus according to the invention is to provide not only energy recovery but jointly therewith control of the temperature'in the regenerative combustor.
Another purpose of the method and the apparatus according to the invention is to eliminate toxic or climate-endagering or malodor-ous substances by burning them.
Yet another purpose of the invention is to recover, from the re-generative combustor, thermal energy of such a quality that it may be used primarily for high temperature output, for instance in the pro-duction of electricity.
These and other purposes are achieved in accordance with the invention by means of a method andan apparatus defined in the characterizing clauses of the appended claims.
One embodiment of the subject invention will be described in closer detail in the following with reference to the accompanying drawings, wherein:
Fig. 1 schematically in a view from above illustrates an appara-tus in accordance with the invention for purification of exhaust or ventilation air from a coal mine.
Fig. 2 is a schematical lateral view of a combustion exchanger according to the invention.
The apparatus illustrated in Fig. 1 is used to purify a medium, -a in the subject case the exhaust or ventilation air from a coal mine.
Exhaust air of this kind usually contains combustible substances, i.a.
combustible methane gas. Exhaust air is carried from a mine shaft 1 via a fan 2 and a valve 3 to a stack 4, or, via a fan 5 to a stack 6 when the inventive apparatus, generally designated by reference 7, is not used.
In accordance with the embodiment illustrated the device 7 ac-cording to the invention comprises four combustion exchangers, the exchangers being designated generally by references 8, 81, 81I, 81I1, 8rv, but it could of course include a larger or smaller number of combus-tion exchangers, depending on the field of usage. Via a process fan 9, which is common to all the combustion exchangers, and a valve 10, one for each combustion exchanger, each combustion exchanger 8 is connected to a plurality of inlet ducts 11 and a plurality of outlet ducts 12. In accordance with the embodiment shown there are nine inlet ducts and nine outlet ducts but the number of inlet and outlet ducts could be varied. Each inlet duct 11 and each outlet duct 12 is equipped with a damping device, generally designated by references 13 and 14, respectively. By way of a valve 15, one for each combus-tion exchanger 8, the outlet ducts 12 lead to the stack 6. The single fan 9 can also be replaced by e.g. four fans, one each for each com-bustion exchanger.
Fig. 2 is a schematical cross-sectional view through a combus-tion exchanger 8. The damping devices 13 and 14 are formed with dampers 18 and 19, respectively, which are movable vertically be-tween two sealing positions in which each damper sealingly abuts against its channels 16 and 17, respectively. The two dampers 18 and 19 never seal off the same channel and in the position illustrated in continuous lines the damper 18 seals off the entrance 20 to channel 17 whereas the damper 19 seals off the exit 21 from channel 16. Con-sequently, the medium containing combustible substances is carried via the inlet duct 11 through the entrance 22 of channel 16 into the bed 23 of the combustion exchanger wherein the substances are burnt in a manner known per se, whereupon the flow continues out through channel 17 and through its exit 24 to the outlet duct 12. This flow is illustrated schematically by continuous arrows 25 in Fig. 2. In a manner known per se the flow direction through the bed 23 of the combustion exchanger should be reversed from time to time to avoid that the heat front of the bed 23 moves too close to one of the chan-nels 16, 17. Upon such reversal, the dampers 18 and 19 are moved to the positions illustrated in Fig. 2 in discontinuous lines and the flow associated with these damper positions is illustrated schematically by means of the dotted-line arrows 26.
Obviously, the valves 10, 15 may be used to stop the flow to and from a combustion exchanger, for instances during servicing, for re-pairs and the like. It is further understood that valve 3 could be a valve which, depending on the flow through the fan 9, opens or closes the flow to the stack 4 in order to ensure that the shaft 1 is always ventilated, independently of the flow through the device 7.
In the area of the centre of the bed 23, the area known as the combustion zone, there is a heating device 27, which could be electri-cally heated, with the aid of which the bed could be heated to the spontaneous combustion temperature of the combustible substances, for instance when the combustion exchanger is to be started up.
In the area of the combustion zone there is also a drain or di-verting means 28 which is used to divert a part flow of the heated medium after combustion. In accordance with this embodiment, the diverting means 28 is a perforated tube extending along the bed 23 of the combustion zone but could also be configured differently, for in-stance as a means arranged to suck medium directly through the wall 29 of the bed 23. In accordance with the illustrated embodiment the diverting means 28 is in turn connected to a steam boiler 30, illus-trated schematically in Fig. 1. Medium diverted by the diverting means 28 is carried through the steam boiler 30 to the stack 6 via a fan 31 which compensates for the pressure drop inside the boiler.
Because the spontaneous combustion temperature in the com-bustion exchanger is approximately 1000 C in accordance with the embodiment described, according to which the combustible substance preferably consists of methane gas emanating from a coal mine, medium diverted directly from the combustion zone may be efficiently made use of in the steam boiler 30 to generate electric energy by us-ing a steam turbine and a generator. This electric energy could be used in accordance with the embodiment above for instance to oper-ate one fan or several fans 2, 5, 9 and 31. Because in mining it is ab-solutely necessary that the galleries are ventilated at all times on ac-5 count of the risks of explosion, it is essential that at least one of the fans 2, 5 permenantly is in function, i.e. also in the case of failure of the electricity mains. Otherwise, the mine has to be evacuated, which is a difficult, time-consuming and costly operation. Owing to the in-vention such fans may be operated in a cost-efficient manner without the mine having to rely on supply of electricity from an external dis-tribution network. In addition, surplus electric energy generated by the steam boiler, turbine and generator could be sold. The inventive device and method thus make it economically advantageous and technically possible to protect the environment by means of combus-tion inside the bed 23 and at the same time to produce electric en-ergy.
In coal mines the methane gas concentration in the exhaust air normally amounts to maximum 20% L.E.L. (Low Explosion Limit). It has proved possible to construct the combustion exchanger in a man-ner allowing a thermal efficiency rate of 98% to be achieved. This means that a combustion exchanger is self-sufficient with respect to sustaining the spontaneous combustion temperature inside the combustion zone when the methane gas concentration in the me-dium exceeds 0.1% (2% L.E.L.). Application of the invention thus likewise makes it possible to recover electric energy also from media having a low concentration of combustible substances, which has hitherto not been practically possible. In addition, the amount of medium diverted by the diverting device 28 could be used to control the temperature inside the bed 23 in order to avoid that the combus-tion zone becomes too wide and for instance comes into contact with the bed-surrounding housing, which in itself could involve risks for burns and also unnecessary energy losses. With the inventive device it is also easy to control the diverted energy by varying the diverted flow in order to compensate for any variations in the amounts of combus-{
tible substance in the media moving through the bed 23. The com-bustion process is also very clean, since no prompt and/or thermal NOX is produced in a flame during the combustion.
The apparatus illustrated in Fig. 1 is used to purify a medium, -a in the subject case the exhaust or ventilation air from a coal mine.
Exhaust air of this kind usually contains combustible substances, i.a.
combustible methane gas. Exhaust air is carried from a mine shaft 1 via a fan 2 and a valve 3 to a stack 4, or, via a fan 5 to a stack 6 when the inventive apparatus, generally designated by reference 7, is not used.
In accordance with the embodiment illustrated the device 7 ac-cording to the invention comprises four combustion exchangers, the exchangers being designated generally by references 8, 81, 81I, 81I1, 8rv, but it could of course include a larger or smaller number of combus-tion exchangers, depending on the field of usage. Via a process fan 9, which is common to all the combustion exchangers, and a valve 10, one for each combustion exchanger, each combustion exchanger 8 is connected to a plurality of inlet ducts 11 and a plurality of outlet ducts 12. In accordance with the embodiment shown there are nine inlet ducts and nine outlet ducts but the number of inlet and outlet ducts could be varied. Each inlet duct 11 and each outlet duct 12 is equipped with a damping device, generally designated by references 13 and 14, respectively. By way of a valve 15, one for each combus-tion exchanger 8, the outlet ducts 12 lead to the stack 6. The single fan 9 can also be replaced by e.g. four fans, one each for each com-bustion exchanger.
Fig. 2 is a schematical cross-sectional view through a combus-tion exchanger 8. The damping devices 13 and 14 are formed with dampers 18 and 19, respectively, which are movable vertically be-tween two sealing positions in which each damper sealingly abuts against its channels 16 and 17, respectively. The two dampers 18 and 19 never seal off the same channel and in the position illustrated in continuous lines the damper 18 seals off the entrance 20 to channel 17 whereas the damper 19 seals off the exit 21 from channel 16. Con-sequently, the medium containing combustible substances is carried via the inlet duct 11 through the entrance 22 of channel 16 into the bed 23 of the combustion exchanger wherein the substances are burnt in a manner known per se, whereupon the flow continues out through channel 17 and through its exit 24 to the outlet duct 12. This flow is illustrated schematically by continuous arrows 25 in Fig. 2. In a manner known per se the flow direction through the bed 23 of the combustion exchanger should be reversed from time to time to avoid that the heat front of the bed 23 moves too close to one of the chan-nels 16, 17. Upon such reversal, the dampers 18 and 19 are moved to the positions illustrated in Fig. 2 in discontinuous lines and the flow associated with these damper positions is illustrated schematically by means of the dotted-line arrows 26.
Obviously, the valves 10, 15 may be used to stop the flow to and from a combustion exchanger, for instances during servicing, for re-pairs and the like. It is further understood that valve 3 could be a valve which, depending on the flow through the fan 9, opens or closes the flow to the stack 4 in order to ensure that the shaft 1 is always ventilated, independently of the flow through the device 7.
In the area of the centre of the bed 23, the area known as the combustion zone, there is a heating device 27, which could be electri-cally heated, with the aid of which the bed could be heated to the spontaneous combustion temperature of the combustible substances, for instance when the combustion exchanger is to be started up.
In the area of the combustion zone there is also a drain or di-verting means 28 which is used to divert a part flow of the heated medium after combustion. In accordance with this embodiment, the diverting means 28 is a perforated tube extending along the bed 23 of the combustion zone but could also be configured differently, for in-stance as a means arranged to suck medium directly through the wall 29 of the bed 23. In accordance with the illustrated embodiment the diverting means 28 is in turn connected to a steam boiler 30, illus-trated schematically in Fig. 1. Medium diverted by the diverting means 28 is carried through the steam boiler 30 to the stack 6 via a fan 31 which compensates for the pressure drop inside the boiler.
Because the spontaneous combustion temperature in the com-bustion exchanger is approximately 1000 C in accordance with the embodiment described, according to which the combustible substance preferably consists of methane gas emanating from a coal mine, medium diverted directly from the combustion zone may be efficiently made use of in the steam boiler 30 to generate electric energy by us-ing a steam turbine and a generator. This electric energy could be used in accordance with the embodiment above for instance to oper-ate one fan or several fans 2, 5, 9 and 31. Because in mining it is ab-solutely necessary that the galleries are ventilated at all times on ac-5 count of the risks of explosion, it is essential that at least one of the fans 2, 5 permenantly is in function, i.e. also in the case of failure of the electricity mains. Otherwise, the mine has to be evacuated, which is a difficult, time-consuming and costly operation. Owing to the in-vention such fans may be operated in a cost-efficient manner without the mine having to rely on supply of electricity from an external dis-tribution network. In addition, surplus electric energy generated by the steam boiler, turbine and generator could be sold. The inventive device and method thus make it economically advantageous and technically possible to protect the environment by means of combus-tion inside the bed 23 and at the same time to produce electric en-ergy.
In coal mines the methane gas concentration in the exhaust air normally amounts to maximum 20% L.E.L. (Low Explosion Limit). It has proved possible to construct the combustion exchanger in a man-ner allowing a thermal efficiency rate of 98% to be achieved. This means that a combustion exchanger is self-sufficient with respect to sustaining the spontaneous combustion temperature inside the combustion zone when the methane gas concentration in the me-dium exceeds 0.1% (2% L.E.L.). Application of the invention thus likewise makes it possible to recover electric energy also from media having a low concentration of combustible substances, which has hitherto not been practically possible. In addition, the amount of medium diverted by the diverting device 28 could be used to control the temperature inside the bed 23 in order to avoid that the combus-tion zone becomes too wide and for instance comes into contact with the bed-surrounding housing, which in itself could involve risks for burns and also unnecessary energy losses. With the inventive device it is also easy to control the diverted energy by varying the diverted flow in order to compensate for any variations in the amounts of combus-{
tible substance in the media moving through the bed 23. The com-bustion process is also very clean, since no prompt and/or thermal NOX is produced in a flame during the combustion.
It is understood that it is quite possible to modify the described embodiment somewhat. For instance, the number of combustion ex-changers 8 as also the number of diverting means 28 in each bed 23 could be varied. The damping devices 13, 14 obviously could be con-figured differently as to details from those shown as long as they pro-duce a change of flow direction inside the bed 23. In addition, the channels 16, 17 could be differently shaped and could for instance consist of perforated tubes arranged inside the bed 23, a combustion zone being established between them, for instance as described in the Swedish Patent Specification 9103634-3. It is also understood that instead of a combustion exchanger, any regenerative combustor could be used.
The heating medium could of course also be used to produce other forms of energy than electric energy and the diverting means 28 could in this case also be connected to other types of energy-produc-tion installations than a steam boiler 30. For instance, the heated medium could be used to heat another medium, such as water, in which case the thermal energy in said second medium is instead used for instance in a district heating system. Furthermore, the thermal energy of the heated medium could in this case be recovered by means of a diverting means in the form of at least one pipe which al-lows a corresponding flow of the second medium and which is dis-posed inside the combustion zone of a regenerative combustor, pref-erably the bed (23) of a combustion exchanger.
The device and method according to the invention are not either limited to use in mining operations but could also be used for in-stance in ventilation installations in the production of paints, in printing works, coating and lamination processes, the production of chemicals and pharmaceutical products, animal breeding installa-tions, digestion plants, at waste deposits, and in the production of plastics and tyres, in other words in connection with such plants and processes wherein some kind of hydrocarbon compounds, such as solvents, styrene, plastic smokes, fumes from fuel tanks, fumes from fish-processing industries, diesel-engine or natural-gas soot, or com-bustible inorganic substances, i.e. carbon monoxide, e.g. from pro-of electric-furnace steel, or hydrogen, e.g. from chemical in-duction dustries, are present in the medium to be transferred through the re-generative combustor, which preferably is a combustion exchanger.
All kinds of combustible substances, i.e. also malodorous or toxic emanations from various processes or from degassifications or gas escapes can be efficiently eliminated from the medium whilst generat-ing energy. It is also easily understood that the invention need not be used in combination with the stacks 4, 6, the fans 2, 5 or the valve 3 as illustrated in Fig. 1, but that it could instead be used in any instal-lation wherein the medium meets with the above-mentioned require-ments.
All such varieties and modifications that are encompassed by the basic inventive idea could however be regarded to be covered by the scope of protection of the appended claims.
The heating medium could of course also be used to produce other forms of energy than electric energy and the diverting means 28 could in this case also be connected to other types of energy-produc-tion installations than a steam boiler 30. For instance, the heated medium could be used to heat another medium, such as water, in which case the thermal energy in said second medium is instead used for instance in a district heating system. Furthermore, the thermal energy of the heated medium could in this case be recovered by means of a diverting means in the form of at least one pipe which al-lows a corresponding flow of the second medium and which is dis-posed inside the combustion zone of a regenerative combustor, pref-erably the bed (23) of a combustion exchanger.
The device and method according to the invention are not either limited to use in mining operations but could also be used for in-stance in ventilation installations in the production of paints, in printing works, coating and lamination processes, the production of chemicals and pharmaceutical products, animal breeding installa-tions, digestion plants, at waste deposits, and in the production of plastics and tyres, in other words in connection with such plants and processes wherein some kind of hydrocarbon compounds, such as solvents, styrene, plastic smokes, fumes from fuel tanks, fumes from fish-processing industries, diesel-engine or natural-gas soot, or com-bustible inorganic substances, i.e. carbon monoxide, e.g. from pro-of electric-furnace steel, or hydrogen, e.g. from chemical in-duction dustries, are present in the medium to be transferred through the re-generative combustor, which preferably is a combustion exchanger.
All kinds of combustible substances, i.e. also malodorous or toxic emanations from various processes or from degassifications or gas escapes can be efficiently eliminated from the medium whilst generat-ing energy. It is also easily understood that the invention need not be used in combination with the stacks 4, 6, the fans 2, 5 or the valve 3 as illustrated in Fig. 1, but that it could instead be used in any instal-lation wherein the medium meets with the above-mentioned require-ments.
All such varieties and modifications that are encompassed by the basic inventive idea could however be regarded to be covered by the scope of protection of the appended claims.
Claims (23)
1. A method of recovering energy from a medium containing combustible substances even at low concentrations, the method comprising the steps of:
- raising the temperature of the medium in a reversal flow direction combustion device, in a warm combustion zone, to the combustion temperature at which essentially all chemical energy of the combustible substances is transformed into thermal energy, wherein the warm combustion zone is located in the area of the centre of a bed;
- diverting at least a portion of the heated medium directly from the combustion zone by diverting means after the combustion of the combustible substances, wherein the diverting means comprise at least one perforated tube which is positioned in the warm combustion zone inside the bed, and - utilizing the heated medium for the production of a wanted form of energy.
- raising the temperature of the medium in a reversal flow direction combustion device, in a warm combustion zone, to the combustion temperature at which essentially all chemical energy of the combustible substances is transformed into thermal energy, wherein the warm combustion zone is located in the area of the centre of a bed;
- diverting at least a portion of the heated medium directly from the combustion zone by diverting means after the combustion of the combustible substances, wherein the diverting means comprise at least one perforated tube which is positioned in the warm combustion zone inside the bed, and - utilizing the heated medium for the production of a wanted form of energy.
2. The method according to claim 1, wherein the diverted medium is used in a steam boiler, followed by a turbine and a generator, for the production of electric energy.
3. The method according to claim 1 or 2, wherein the medium is a gas.
4. A device for recovering energy from a medium containing combustible substances even at low of a bed, the device comprising diverting means being located in the area of the centre of the bed, and is connected to an energy-production installation, wherein the diverting means comprise at least one perforated tube that is positioned in the combustion zone inside the bed.
5. The device as claimed in claim 4, wherein the energy-production installation is a steam boiler, followed by a turbine and a generator.
6. The method according to claim 1 or 2, wherein the medium is a mine gas from mining operations.
7. The method according to claim 1 or 2, wherein the medium is a digestion gas from a digestion plant.
8. The method according to claim 1 or 2, wherein the medium is an exhaust gas from a production plant.
9. The method according to claim 1 or 2, wherein the medium is an exhaust gas from an animal production plant.
10. The method according to claim 9, wherein the animal production plant is a breeding installation.
11. The method according to claim 1 or 2, wherein the medium is a mixture of a combustible substance and air, from escapes, seepings or bleedings from the soil.
12. The method according to claim 11, wherein the mixture is from a natural gas bleeding.
13. The method according to claim 1 or 2, wherein the medium is a mixture of a combustible substance and air, from escapes or bleedings from an industrial process.
14. The method according to claim 13, wherein the mixture is from evaporative losses from processing, storage or distribution of combustible substances.
15. The device according to claim 4 or 5, wherein the medium is a mine gas from mining operations.
16. The device according to claim 4 or 5, wherein the medium is a digestion gas from a digestion plant.
17. The device according to claim 4 or 5, wherein the medium is an exhaust gas from a production plant.
18. The device according to claim 4 or 5, wherein the medium is an exhaust gas from an animal production plant.
19. The device according to claim 18, wherein the animal production plant is a breeding installation.
20. The device according to claim 4 or 5, wherein the medium is a mixture of a combustible substance and air, from escapes, seepings or bleedings from the soil.
21. The device according to claim 20, wherein the mixture is from a natural gas bleeding.
22. The device according to claim 4 or 5, wherein the medium is a mixture of a combustible substance and air, from escapes or bleedings from an industrial process.
23. The device according to claim 22, wherein the mixture is from evaporative losses from processing, storage or distribution of combustible substances.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9501476A SE9501476D0 (en) | 1995-04-24 | 1995-04-24 | Device for function selection at a hand-held communication unit |
| PCT/SE1995/001476 WO1997021959A1 (en) | 1995-12-08 | 1995-12-08 | A method and a device for recovery of energy from media containing combustible substances even at low concentration |
| CA002238096A CA2238096C (en) | 1995-12-08 | 1995-12-08 | A method and a device for recovery of energy from media containing combustible substances even at low concentration |
| CNB951979981A CN1145757C (en) | 1995-12-08 | 1995-12-08 | Method and device for recovery of energy from media containing combustible substances even at low concentration |
| PL95328697A PL181258B1 (en) | 1995-12-08 | 1995-12-08 | Method of and apparatus for recovering energy from a medium containing flammable substances oven of low concentration |
| EP95943562A EP0865592B1 (en) | 1995-12-08 | 1995-12-08 | A method and a device for recovery of energy from media containing combustible substances even at low concentration |
| IL11972896A IL119728A (en) | 1995-12-08 | 1996-12-01 | Method and device for recovery of energy from media containing combustible substances even at low concentration |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/SE1995/001476 WO1997021959A1 (en) | 1995-12-08 | 1995-12-08 | A method and a device for recovery of energy from media containing combustible substances even at low concentration |
| CA002238096A CA2238096C (en) | 1995-12-08 | 1995-12-08 | A method and a device for recovery of energy from media containing combustible substances even at low concentration |
| CNB951979981A CN1145757C (en) | 1995-12-08 | 1995-12-08 | Method and device for recovery of energy from media containing combustible substances even at low concentration |
| PL95328697A PL181258B1 (en) | 1995-12-08 | 1995-12-08 | Method of and apparatus for recovering energy from a medium containing flammable substances oven of low concentration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2238096A1 CA2238096A1 (en) | 1997-06-19 |
| CA2238096C true CA2238096C (en) | 2008-02-12 |
Family
ID=27427438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002238096A Expired - Fee Related CA2238096C (en) | 1995-04-24 | 1995-12-08 | A method and a device for recovery of energy from media containing combustible substances even at low concentration |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0865592B1 (en) |
| CN (1) | CN1145757C (en) |
| CA (1) | CA2238096C (en) |
| IL (1) | IL119728A (en) |
| PL (1) | PL181258B1 (en) |
| WO (1) | WO1997021959A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6261092B1 (en) * | 2000-05-17 | 2001-07-17 | Megtec Systems, Inc. | Switching valve |
| US6749815B2 (en) | 2001-05-04 | 2004-06-15 | Megtec Systems, Inc. | Switching valve seal |
| US7325562B2 (en) | 2002-05-07 | 2008-02-05 | Meggec Systems, Inc. | Heated seal air for valve and regenerative thermal oxidizer containing same |
| US6669472B1 (en) | 2002-08-28 | 2003-12-30 | Megtec Systems, Inc. | Dual lift system |
| US7150446B1 (en) | 2002-08-28 | 2006-12-19 | Megtec Systems, Inc. | Dual lift system |
| JP2010532909A (en) * | 2007-03-06 | 2010-10-14 | セラムテック アクチエンゲゼルシャフト | Method for environmentally removing air / solvent mixtures in fuel cell systems and recovery units |
| CN101766952B (en) * | 2009-12-30 | 2012-11-21 | 山东理工大学 | Gas flow reverse control method of ventilation air methane thermal oxidation device of coal mine |
| CN102200285A (en) * | 2011-03-22 | 2011-09-28 | 创新工程方案有限公司 | Dynamic oxidation of industrial waste gas |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3312863C2 (en) * | 1983-04-09 | 1986-12-04 | Kernforschungsanlage Jülich GmbH, 5170 Jülich | Combustion chamber for burning exhaust gases |
| DK161037C (en) * | 1988-10-17 | 1991-10-28 | Haldor Topsoe As | PROCEDURE AND PLANT TO CONTINUOUSLY CLEAN AN OXYGEN GAS FOR FLAMMABLE POLLUTIONS |
| DE4102717A1 (en) * | 1990-01-30 | 1991-08-01 | Ltg Lufttechnische Gmbh | Regenerative reactor burning waste gas - has expansion zones in partitions reducing load on peripheral wall |
| SE500521C2 (en) * | 1991-12-09 | 1994-07-11 | Bjoern Heed | Combustion device comprising a stationary bed with heat accumulating and heat exchanging properties |
-
1995
- 1995-12-08 CA CA002238096A patent/CA2238096C/en not_active Expired - Fee Related
- 1995-12-08 EP EP95943562A patent/EP0865592B1/en not_active Expired - Lifetime
- 1995-12-08 WO PCT/SE1995/001476 patent/WO1997021959A1/en active IP Right Grant
- 1995-12-08 CN CNB951979981A patent/CN1145757C/en not_active Expired - Fee Related
- 1995-12-08 PL PL95328697A patent/PL181258B1/en unknown
-
1996
- 1996-12-01 IL IL11972896A patent/IL119728A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CN1145757C (en) | 2004-04-14 |
| EP0865592B1 (en) | 2002-08-28 |
| CA2238096A1 (en) | 1997-06-19 |
| CN1205071A (en) | 1999-01-13 |
| IL119728A0 (en) | 1997-03-18 |
| WO1997021959A1 (en) | 1997-06-19 |
| EP0865592A1 (en) | 1998-09-23 |
| PL181258B1 (en) | 2001-06-29 |
| PL328697A1 (en) | 1999-02-15 |
| IL119728A (en) | 2000-10-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20131210 |