A fluid heater for heating fluid moving along a fluid path between a fluid inlet and a fluid outlet. The fluid heater comprises a fluid preheating assembly configured to directly heat fluid moving along the fluid path, a fluid holding tank for receiving preheated fluid moving along the fluid path fr
A fluid heater for heating fluid moving along a fluid path between a fluid inlet and a fluid outlet. The fluid heater comprises a fluid preheating assembly configured to directly heat fluid moving along the fluid path, a fluid holding tank for receiving preheated fluid moving along the fluid path from the fluid preheating assembly, a primary fluid pump configured to pump fluid along the fluid path, and a primary fluid heating assembly configured to indirectly heat fluid moving along the fluid path from the fluid holding tank. Fuel is combusted in the primary fluid assembly and an exhaust gas movement path is defined to guide the exhaust gas from the primary fluid heating assembly through the fluid holding tank to the fluid preheating assembly.
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1. A fluid heater for heating fluid moving along a fluid path between a fluid inlet and a fluid outlet, the fluid heater comprising: a fluid preheating assembly configured to directly heat fluid moving along the fluid path;a fluid holding tank for receiving preheated fluid moving along a portion of
1. A fluid heater for heating fluid moving along a fluid path between a fluid inlet and a fluid outlet, the fluid heater comprising: a fluid preheating assembly configured to directly heat fluid moving along the fluid path;a fluid holding tank for receiving preheated fluid moving along a portion of the fluid path from the fluid preheating assembly, the fluid holding tank having an interior configured to guide fluid on the portion of the fluid path through the holding tank in a horizontal fluid movement direction;a primary fluid pump configured to pump fluid along the fluid path; anda primary fluid heating assembly configured to indirectly heat fluid moving along the fluid path from the fluid holding tank by fuel combusted in the primary fluid heating assembly;an exhaust gas conduit defining an exhaust gas movement path from the primary fluid heating assembly to the fluid preheating assembly through the fluid holding tank, the exhaust gas conduit having an entry where the exhaust gas movement path enters the exhaust gas conduit and an exit where the exhaust gas movement path exits the exhaust gas conduit;a first portion of the exhaust gas conduit having a length extending from the entry of the conduit to a first elbow of the conduit and defining a first portion of the exhaust gas movement path, a second portion of the exhaust gas conduit having a length extending from the first elbow of the conduit to a second elbow of the conduit and defining a second portion of the exhaust gas movement path, a third portion of the exhaust gas conduit having a length extending from the second elbow to the exit of the conduit and defining a third portion of the exhaust gas movement path;wherein the first portion of the exhaust gas conduit is vertically oriented such that the first portion of the exhaust gas movement path extends downwardly into the interior of the fluid holding tank, the second portion of the exhaust gas conduit is substantially horizontally oriented such that the second portion of the exhaust gas movement path extends horizontally through the interior of the fluid holding tank to the fluid preheating assembly; andwherein the second portion of the exhaust gas conduit is oriented in the interior of the holding tank such that the exhaust gas has a movement direction through the interior that is parallel and opposite of a movement direction of the fluid;wherein the length of the second portion of the exhaust gas conduit is greater than the length of the first portion of the exhaust gas conduit and is greater than the length of the third portion of the exhaust gas conduit. 2. The fluid heater of claim 1 wherein the fluid preheating assembly comprises a housing with a housing interior defining a portion of the exhaust gas movement path, transfer media positioned in the housing interior through which the exhaust gas movement path passes, and a fluid dispersion device configured to disperse fluid from the fluid path onto the transfer media. 3. The fluid heater of claim 2 wherein the housing has a lower opening and an upper opening with the exhaust gas movement path extending therebetween in a substantially vertical orientation. 4. The fluid heater of claim 1 wherein the fluid holding tank is elongated between longitudinal ends, and the exhaust gas conduit extends in a longitudinal direction of the tank and enters the tank interior toward one end of the tank and exits the tank interior at an opposite end of the tank. 5. The fluid heater of claim 2 wherein a portion of the fluid path passes through the housing interior, and movement of fluid along the fluid path in the housing interior is in a downward vertical direction that is opposite of an upward vertical direction of movement of exhaust gases on the exhaust gas movement path in the housing interior. 6. The fluid heater of claim 1 wherein the primary fluid heating assembly comprises a heater housing, fluid tubing positioned about a combustion chamber and defining a portion of the fluid path, and a burner configured to combust a fuel to generate combustion exhaust gases to move along the exhaust gas movement path. 7. The fluid heater of claim 6 wherein the fluid tubing is formed into a coil. 8. The fluid heater of claim 7 wherein the primary fluid heating assembly is configured such that the exhaust gas movement path has a first horizontal pass that extends inside the coil and a second horizontal pass extending outside the coil. 9. The fluid heater of claim 7 additionally comprising a heat shield positioned in the coil of fluid tubing to define the combustion chamber. 10. The fluid heater of claim 1 wherein the exhaust gas conduit is positioned in the tank interior such that an exterior of the conduit is contacted by fluid in the tank interior moving along the fluid path. 11. The fluid heater of claim 1 wherein a direction of movement of fluid along the fluid path in the fluid preheating assembly, fluid holding tank and primary fluid heating assembly is substantially opposite to a direction of movement of exhaust gases on the exhaust gas movement path moving through the fluid preheating assembly, fluid holding tank and primary fluid heating assembly. 12. The fluid heater of claim 1 wherein the primary fluid pump is connected to a tank outlet to draw fluid from an interior of the fluid tank and pump fluid through the primary fluid heating assembly. 13. The fluid heater of claim 1 additionally comprising a secondary fluid pump configured to pump fluid along the fluid path, the secondary fluid pump being configured to pump fluid into the fluid preheating assembly. 14. The fluid heater of claim 1 wherein the exhaust gas conduit is configured such that the length of the second portion of the exhaust gas conduit is at least four times the length of the third portion of the exhaust gas conduit. 15. The fluid heater of claim 1 wherein the exhaust gas conduit is configured such that the length of the second portion of the exhaust gas conduit is approximately four times the length of the third portion of the exhaust gas conduit. 16. The fluid heater of claim 1 wherein the exhaust gas conduit is configured such that the length of the second portion of the exhaust gas conduit is at least four times the length of the third portion of the exhaust gas conduit and the length of the second portion of the exhaust gas conduit is approximately four times the length of the third portion of the exhaust gas conduit. 17. The fluid heater of claim 1 wherein the exhaust gas conduit defines a closed path between the entry and exit to isolate the exhaust gases on the exhaust gas movement path from direct contact with the fluid on the fluid path. 18. The fluid heater of claim 1 wherein the third portion is substantially vertically oriented such that the third portion of the exhaust gas movement path extends upwardly out of the interior of the fluid holding tank. 19. A fluid heater for heating fluid moving along a fluid path between a fluid inlet and a fluid outlet, the fluid heater comprising: a fluid preheating assembly configured to directly heat fluid moving along the fluid path;a fluid holding tank for receiving preheated fluid moving along a portion of the fluid path from the fluid preheating assembly, the fluid holding tank having an interior configured to guide fluid on the portion of the fluid path through the holding tank in a horizontal fluid movement direction;a primary fluid pump configured to pump fluid along the fluid path; anda primary fluid heating assembly configured to indirectly heat fluid moving along the fluid path from the fluid holding tank by fuel combusted in the primary fluid heating assembly;an exhaust gas conduit defining an exhaust gas movement path from the primary fluid heating assembly to the fluid preheating assembly through the fluid holding tank, the exhaust gas conduit having an entry where the exhaust gas movement path enters the exhaust gas conduit and an exit where the exhaust gas movement path exits the exhaust gas conduit, the exhaust gas conduit defining a closed path between the entry and exit to isolate the exhaust gases on the exhaust gas movement path from direct contact with the fluid on the fluid path;a first portion of the exhaust gas conduit having a length extending from the entry of the conduit to a first elbow of the conduit and defining a first portion of the exhaust gas movement path, a second portion of the exhaust gas conduit having a length extending from the first elbow of the conduit to a second elbow of the conduit and defining a second portion of the exhaust gas movement path, a third portion of the exhaust gas conduit having a length extending from the second elbow to the exit of the conduit and defining a third portion of the exhaust gas movement path;wherein the first portion of the exhaust gas conduit is vertically oriented such that the first portion of the exhaust gas movement path extends downwardly into the interior of the fluid holding tank, the second portion of the exhaust gas conduit is substantially horizontally oriented such that the second portion of the exhaust gas movement path extends horizontally through the interior of the fluid holding tank to the fluid preheating assembly, and the third portion is substantially vertically oriented such that the third portion of the exhaust gas movement path extends upwardly out of the interior of the fluid holding tank; andwherein the second portion of the exhaust gas conduit is oriented in the interior of the holding tank such that the exhaust gas has a movement direction through the interior that is parallel and opposite of a movement direction of the fluid;wherein the length of the second portion of the exhaust gas conduit is greater than the length of the first portion of the exhaust gas conduit and is greater than the length of the third portion of the exhaust gas conduit. 20. A fluid heater for heating fluid moving along a fluid path between a fluid inlet and a fluid outlet, the fluid heater comprising: a fluid preheating assembly configured to heat fluid moving along a portion of the fluid path by direct contact with exhaust gases moving along the exhaust gas movement path, the fluid preheating assembly having a housing with an interior receiving exhaust gases on the exhaust gas movement path;a fluid holding tank for receiving preheated fluid moving along a portion of the fluid path from the fluid preheating assembly, the fluid holding tank being elongated between opposite ends and having an interior configured to guide fluid on the portion of the fluid path through the holding tank in a first horizontal fluid movement direction;a primary fluid pump configured to pump fluid along the fluid path; anda primary fluid heating assembly configured to indirectly heat fluid moving in a tubular coil forming a portion of the fluid path by fuel combusted by a burner of the primary fluid heating assembly to create a flow of exhaust gas along an exhaust gas movement path, the primary fluid heating assembly including a housing with an interior from which the exhaust gases on the exhaust gas movement path exits after passing over the coil;an exhaust gas conduit defining an exhaust gas movement path from the primary fluid heating assembly to the fluid preheating assembly through the fluid holding tank, the exhaust gas conduit having an entry where the exhaust gas movement path enters the exhaust gas conduit and an exit where the exhaust gas movement path exits the exhaust gas conduit, the exhaust gas conduit defining a closed path between the entry and exit to isolate the exhaust gases on the exhaust gas movement path from direct contact with the fluid on the fluid path;a first portion of the exhaust gas conduit having a length extending from the entry of the conduit to a first elbow of the conduit and defining a first portion of the exhaust gas movement path, a second portion of the exhaust gas conduit having a length extending from the first elbow of the conduit to a second elbow of the conduit and defining a second portion of the exhaust gas movement path, a third portion of the exhaust gas conduit having a length extending from the second elbow to the exit of the conduit and defining a third portion of the exhaust gas movement path;wherein the first portion of the exhaust gas conduit is vertically oriented such that the first portion of the exhaust gas movement path extends downwardly into the interior of the fluid holding tank, the second portion of the exhaust gas conduit is substantially horizontally oriented such that the second portion of the exhaust gas movement path extends horizontally through the interior of the fluid holding tank to the fluid preheating assembly, and the third portion is substantially vertically oriented such that the third portion of the exhaust gas movement path extends upwardly out of the interior of the fluid holding tank; andwherein the second portion of the exhaust gas conduit is oriented in the interior of the holding tank such that the exhaust gas has a horizontal movement direction through the interior that is parallel and opposite of the first horizontal movement direction of the fluid;wherein the length of the second portion of the exhaust gas conduit is greater than the length of the first portion of the exhaust gas conduit and is greater than the length of the third portion of the exhaust gas conduit.
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이 특허에 인용된 특허 (20)
Korenberg Jacob (York PA) Khinkis Mark (Morton Grove IL), Boiler with cyclonic combustion.
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