A feed gas conditioner includes a pressure vessel that encloses at least part of a pre-heater. The pre-heater has an inlet for connection to a source of feed gas and an outlet for delivering the feed gas into the interior of the pressure vessel. An electrical heater element located within the pre-he
A feed gas conditioner includes a pressure vessel that encloses at least part of a pre-heater. The pre-heater has an inlet for connection to a source of feed gas and an outlet for delivering the feed gas into the interior of the pressure vessel. An electrical heater element located within the pre-heater increases the temperature of the feed gas as it flows through the pre-heater. An expansion valve reduces the pressure of the feed gas as it flows from the pre-heater so as to initiate condensation. A super heater is at least partially located within the pressure vessel and has an inlet within the interior of the pressure vessel. A filter is in a flow path in the pressure vessel leading from the pre-heater heater to the super heater for removing condensate from the feed gas. An electrical heater element is in the super heater for heating the feed gas.
대표청구항▼
1. An apparatus for conditioning feed gas, comprising: a pressure vessel;a pre-heater heater element housing at least partially located within the pressure vessel, having an inner passage with an inlet for connection to a source of feed gas and an outlet for delivering the feed gas into an interior
1. An apparatus for conditioning feed gas, comprising: a pressure vessel;a pre-heater heater element housing at least partially located within the pressure vessel, having an inner passage with an inlet for connection to a source of feed gas and an outlet for delivering the feed gas into an interior of the pressure vessel;at least one electrical heater element located within the inner passage of the pre-heater heater element housing for increasing the temperature of the feed gas as it flows through the pre-heater heater element housing;an expansion valve for reducing the pressure of the feed gas as it flows from the pre-heater heater element housing so as to initiate condensation;a super heater housing at least partially located within the pressure vessel and having an inlet within the interior of the pressure vessel, the super heater housing having an outlet leading exterior of the pressure vessel;a filter within the interior of the pressure vessel in a flow path leading from the pre-heater heater element passage housing to the super heater housing for removing condensate from the feed gas; andat least one electrical heater element in the super heater housing for heating the feed gas; wherein:the pre-heater heater element housing is located within an outer housing, defining an annular passage between the pre-heater heater element housing and the outer housing; andthe expansion valve is located at a junction between the outlet of the inner passage and an inlet of the annular passage. 2. An apparatus for conditioning feed gas, comprising: a pressure vessel;a pre-heater heater element housing at least partially located within the pressure vessel, having an inner passage with an inlet for connection to a source of feed gas and an outlet for delivering the feed gas into an interior of the pressure vessel;at least one electrical heater element located within the inner passage of the pre-heater heater element housing for increasing the temperature of the feed gas as it flows through the pre-heater heater element housing;an expansion valve for reducing the pressure of the feed gas as it flows from the pre-heater heater element housing so as to initiate condensation;a super heater housing at least partially located within the pressure vessel and having an inlet within the interior of the pressure vessel, the super heater housing having an outlet leading exterior of the pressure vessel;a filter within the interior of the pressure vessel in a flow path leading from the pre-heater heater element passage housing to the super heater housing for removing condensate from the feed gas; andat least one electrical heater element in the super heater housing for heating the feed gas;wherein the pre-heater heater element housing is located within an outer housing, defining an annular passage between the pre-heater heater element housing and the outer housing;wherein the expansion valve is located at a junction between the outlet of the inner passage and an inlet of the annular passage; andwherein the annular passage has an outlet at an end of the outer housing opposite from the outlet of the inner passage. 3. An apparatus for conditioning feed gas, comprising: a pressure vessel;a pre-heater heater element housing at least partially located within the pressure vessel, having an inner passage with an inlet for connection to a source of feed gas and an outlet for delivering the feed gas into an interior of the pressure vessel;at least one electrical heater element located within the inner passage of the pre-heater heater element housing for increasing the temperature of the feed gas as it flows through the pre-heater heater element housing;an expansion valve for reducing the pressure of the feed gas as it flows from the pre-heater heater element housing so as to initiate condensation;a super heater housing at least partially located within the pressure vessel and having an inlet within the interior of the pressure vessel, the super heater housing having an outlet leading exterior of the pressure vessel;a filter within the interior of the pressure vessel in a flow path leading from the pre-heater heater element passage housing to the super heater housing for removing condensate from the feed gas; andat least one electrical heater element in the super heater housing for heating the feed gas;wherein the expansion valve and the outlet of the inner passage are exterior of the pressure vessel. 4. An apparatus for conditioning feed gas, comprising: a pressure vessel;a pre-heater heater element housing at least partially located within the pressure vessel, having an inner passage with an inlet for connection to a source of feed gas and an outlet for delivering the feed gas into an interior of the pressure vessel;at least one electrical heater element located within the inner passage of the pre-heater heater element housing for increasing the temperature of the feed gas as it flows through the pre-heater heater element housing;an expansion valve for reducing the pressure of the feed gas as it flows from the pre-heater heater element housing so as to initiate condensation;a super heater housing at least partially located within the pressure vessel and having an inlet within the interior of the pressure vessel, the super heater housing having an outlet leading exterior of the pressure vessel;a filter within the interior of the pressure vessel in a flow path leading from the pre-heater heater element passage housing to the super heater housing for removing condensate from the feed gas; andat least one electrical heater element in the super heater housing for heating the feed gas; wherein:the filter is divided into a plurality of segments that are separately removable from the pressure vessel, each of the segments having an outer edge that comprises a portion of a cylinder and which engages an inner cylindrical wall of the pressure vessel, and each of the segments having an inner edge that abuts an inner edge of another of the segments. 5. An apparatus for conditioning feed gas, comprising: a pressure vessel;a pre-heater heater element housing at least partially located within the pressure vessel, having an inner passage with an inlet for connection to a source of feed gas and an outlet for delivering the feed gas into an interior of the pressure vessel;at least one electrical heater element located within the inner passage of the pre-heater heater element housing for increasing the temperature of the feed gas as it flows through the pre-heater heater element housing;an expansion valve for reducing the pressure of the feed gas as it flows from the pre-heater heater element housing so as to initiate condensation;a super heater housing at least partially located within the pressure vessel and having an inlet within the interior of the pressure vessel, the super heater housing having an outlet leading exterior of the pressure vessel;a filter within the interior of the pressure vessel in a flow path leading from the pre-heater heater element passage housing to the super heater housing for removing condensate from the feed gas; andat least one electrical heater element in the super heater housing for heating the feed gas;further comprising a first and second drains leading from the pressure vessel and located on opposite sides of the filter for draining condensate from the pressure vessel. 6. An apparatus for conditioning feed gas, comprising: a pressure vessel;a pre-heater having first and second ends, an inner housing and an outer housing at least partially located within the pressure vessel, defining an inner passage and an annular passage, the inner housing having an inlet at the first end for connection to a source of feed gas and an outlet at the second end, the outer housing having an inlet at the second end and an outlet in the vicinity of the first end that leads into the interior of the pressure vessel;at least one electrical heater element located within the inner housing for increasing the temperature of the feed gas as it flows through the inner passage;an expansion valve located in a flow path between the outlet of the inner housing and the inlet of the outer housing for reducing the pressure to initiate condensation of the feed gas as it flows from the inner passage to the annular passage;a super heater having first and second ends and a tubular housing at least partially located within the pressure vessel, the housing of the super heater having an inlet at the second end of the super heater and an outlet at the first end of the super heater leading exterior of the pressure vessel;a coalescing filter within the interior of the pressure vessel in a flow path leading from the outlet annular passage of the pre-heater to the inlet of the super heater for removing condensate from the feed gas; andat least one electrical heater element in the super heater for heating the feed gas. 7. The apparatus according to claim 6, wherein the first end of the pre-heater is exterior of the pressure vessel. 8. The apparatus according to claim 6, wherein the first end of the super heater is exterior of the pressure vessel. 9. The apparatus according to claim 6, wherein the expansion valve and the first and second ends of the pre-heater are exterior of the pressure vessel. 10. The apparatus according to claim 6, wherein the first end of the pre-heater is exterior of the pressure vessel, and the second end of the pre-heater and the expansion valve are within the pressure vessel. 11. The apparatus according to claim 6, wherein the first end and the outlet of the super heater are exterior of the pressure vessel, and the second end and the inlet of the super heater are within the interior of the pressure vessel. 12. The apparatus according to claim 6, wherein the filter has a pre-heater aperture that sealingly surrounds the pre-heater and a super heater aperture that sealingly surrounds the super heater. 13. The apparatus according to claim 6, wherein: the filter is divided into a plurality of segments that are separately removable from the pressure vessel, each of the segments having a partially cylindrical outer edge that engages an inner cylindrical wall of the pressure vessel, and each of the segments having an inner edge that abuts an inner edge of another of the segments. 14. The apparatus according to claim 6, further comprising a first and second drains leading from the pressure vessel and located on opposite sides of the filter for draining condensate from the pressure vessel. 15. A method for conditioning feed gas, comprising: providing a pressure vessel;mounting a pre-heater heater element housing at least partially located within the pressure vessel, the pre-heater heater element housing having at least one electrical heater element;mounting a super heater housing at least partially located within the pressure vessel, the super heater housing having at least one electrical heater element;mounting a filter within the pressure vessel;applying electrical power to the heater elements in the pre-heater heater element housing and the super heater housing;flowing feed gas into the pre-heater heater element housing, thereby increasing the temperature of the feed gas; thenexpanding the feed gas flowing from the pre-heater heater element housing to drop the temperature of the feed gas below a dew point of the feed gas, causing condensate to form; thenflowing the feed gas through the filter to separate condensate from the feed gas; thenflowing the feed gas through the super heater housing to heat the feed gas, then discharging the feed gas from the pressure vessel;further comprising:after expanding the feed gas, flowing the feed gas through an outer housing that is at least partially located in the pressure vessel and surrounds the pre-feeder heater element housing.
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Heath, Rodney T., Apparatus for use with a natural gas dehydrator.
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