EXTRACTION APPARATUS
First Claim
1. An extraction apparatus comprising a body defining a first flow path extending between an inlet and an outlet for air flow from the inlet to the outlet, a second flow path for receiving an exhaust gas flow, the second flow path communicating with the first flow path to deliver exhaust gas into the first flow path for mixing with the air flow at a delivery zone, a third flow path for delivery of water for mixing with the air flow whereby there is confluence of air, exhaust gas and water to provide a fluid mixture for discharging through the outlet, the third flow path being in heat exchange relation with the first flow path whereby water flow in the third flow path provides a cooling effect on the fluid mixture, the third flow path further being in heat exchange relation with the second flow path whereby water flow in the third flow path provides a cooling effect on exhaust gas flow along the second flow path, the first flow path being in heat exchange relation with the second flow path whereby flow along the first flow path provides a cooling effect on exhaust gas flow along the second flow path, and wherein the body comprises an exterior wall defining a boundary of the third flow path, a first interior wall disposed inwardly of the exterior wall, at least a portion of the third flow path being defined between the exterior wall and the first interior wall, and a second interior wall, at least a portion of the second flow path being defined between at least a portion of the first interior wall and the second interior wall whereby the second interior wall provides a dividing wall between the first flow path and the second flow path.
1 Assignment
0 Petitions
Accused Products
Abstract
An extraction apparatus (10) adapted to capture exhaust gas emitted by an internal combustion engine and to dilute the exhaust gas by mixing with air and also cool the exhaust gas. The extraction apparatus (10) has a first flow path (31), second flow path (32), and third flow path (33). The first flow path (31) extends between inlet (35) and an outlet (37) for air flow from the inlet to the outlet. The second flow path (32) receives exhaust gas emitted from the engine and delivers it into the first flow path (31) for mixing with an air flow along the first flow path. The third flow path (33) delivers water for mixing with the air flow. The arrangement is such that there is confluence of air, exhaust gas and water to provide a fluid mixture for discharging through the outlet (37). The exhaust gas is cooled using the cooling effects of the air and also the cooling effects of water in heat exchange relation with the exhaust gas prior to mixing of the exhaust gas with the air. There is also cooling of the mixture of exhaust gas and air using the cooling effects of water in heat exchange relation with the mixture, and also cooling by injection of water into the air. The various flow paths are configured for the requisite heat exchange relation.
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Citations
39 Claims
- 1. An extraction apparatus comprising a body defining a first flow path extending between an inlet and an outlet for air flow from the inlet to the outlet, a second flow path for receiving an exhaust gas flow, the second flow path communicating with the first flow path to deliver exhaust gas into the first flow path for mixing with the air flow at a delivery zone, a third flow path for delivery of water for mixing with the air flow whereby there is confluence of air, exhaust gas and water to provide a fluid mixture for discharging through the outlet, the third flow path being in heat exchange relation with the first flow path whereby water flow in the third flow path provides a cooling effect on the fluid mixture, the third flow path further being in heat exchange relation with the second flow path whereby water flow in the third flow path provides a cooling effect on exhaust gas flow along the second flow path, the first flow path being in heat exchange relation with the second flow path whereby flow along the first flow path provides a cooling effect on exhaust gas flow along the second flow path, and wherein the body comprises an exterior wall defining a boundary of the third flow path, a first interior wall disposed inwardly of the exterior wall, at least a portion of the third flow path being defined between the exterior wall and the first interior wall, and a second interior wall, at least a portion of the second flow path being defined between at least a portion of the first interior wall and the second interior wall whereby the second interior wall provides a dividing wall between the first flow path and the second flow path.
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4. (canceled)
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5. (canceled)
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6. (canceled)
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14. (canceled)
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15. (canceled)
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17. (canceled)
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18. (canceled)
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19. (canceled)
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21. (canceled)
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22. (canceled)
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23. (canceled)
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24. (canceled)
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26. (canceled)
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27. (canceled)
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28. (canceled)
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33. (canceled)
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34. (canceled)
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35. (canceled)
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36. (canceled)
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37. A method of extracting an exhaust gas from a working environment at which the gas is generated, the method comprising:
- capturing the exhaust gas as an exhaust gas flow, directing the captured exhaust gas flow for delivery into an air flow to dilute the exhaust gas, the air flow being along a flow path bounded by a side wall portion and the exhaust gas being delivered into the air flow adjacent the side wall portion whereby exhaust gas is into introduced into the air flow at the periphery thereof, and injecting water into the air flow, whereby there is confluence of air, exhaust gas and water discharging through an outlet as a fluid mixture, wherein the exhaust gas is cooled prior to delivery into the air flow, wherein the exhaust gas is cooled by passing cooling water in heat exchange relation with the exhaust gas and also passing a cooling air flow in heat exchange relation with the exhaust gas, and wherein water injected into the air flow comprises a portion of the cooling water.
- View Dependent Claims (39)
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38. A method of treating an exhaust gas comprising capturing the exhaust gas as an exhaust gas flow, directing the captured exhaust gas flow for delivery into an air flow to dilute the exhaust gas, the air flow being along a flow path bounded by a side wall portion and the exhaust gas being delivered into the air flow adjacent the side wall portion whereby exhaust gas is into introduced into the air flow at the periphery thereof, and injecting water into the air flow, whereby there is confluence of air, exhaust gas and water discharging through an outlet as a fluid mixture, wherein the exhaust gas is cooled prior to delivery into the air flow, wherein the exhaust gas is cooled by passing cooling water in heat exchange relation with the exhaust gas and also passing a cooling air flow in heat exchange relation with the exhaust gas, and wherein water injected into the air flow comprises a portion of the cooling water.
Specification