초록 ▼

The present disclosure relates to a self-regulating, landfill well control system for automatically controlling a flow of landfill gas (LFG) through a wellhead associated with a landfill well at a landfill. The system has a combination unit operably associated with the wellhead, with a valve actuato

The present disclosure relates to a self-regulating, landfill well control system for automatically controlling a flow of landfill gas (LFG) through a wellhead associated with a landfill well at a landfill. The system has a combination unit operably associated with the wellhead, with a valve actuator, a flow measurement element and a controller. The valve actuator controls a LFG flow control valve, to thus control an LFG flow through the wellhead. The flow measurement element produces differential pressures proportional to a LFG flow rate. The controller controls the valve actuator and, based on data obtained using the flow measurement element, adjusts a setting of the LFG flow control valve to obtain a specific control point setting, and automatically maintains the control point setting thereafter.

대표청구항 ▼

1. A self-regulating, landfill gas well control system for automatically controlling a flow of landfill gas (LFG) through an above ground level wellhead associated with a landfill well at a landfill, the system comprising: a combination unit coupled to and supported by the wellhead at a position abo

1. A self-regulating, landfill gas well control system for automatically controlling a flow of landfill gas (LFG) through an above ground level wellhead associated with a landfill well at a landfill, the system comprising: a combination unit coupled to and supported by the wellhead at a position above a ground level surface, the combination unit having:a housing adapted to be operably supported from the wellhead; an electronically controlled valve actuator disposed within the housing for controlling a LFG flow control valve, to thus control a LFG flow through the wellhead;a measurement element disposed within the housing and secured directly to a pipe of the wellhead through which the LFG is flowing, for measuring a parameter which affects the LFG flow through the wellhead;a controller disposed within the housing for electronically controlling the electronically controlled valve actuator, based on LFG gas flow data obtained using the measurement element, to adjust a setting of the LFG flow control valve to obtain a specific control point setting for LFG flow, and to automatically maintain the control point setting; anda wireless transceiver operably associated with the controller and disposed within the housing, configured to enable wireless communication between a remote subsystem and the controller. 2. The system of claim 1, wherein the measurement element comprises an orifice element for enabling a differential pressure across the orifice element to be determined. 3. The system of claim 2, wherein the orifice element comprises at least one of: an orifice plate; ora pitot tube. 4. The system of claim 1, wherein the wireless transceiver disposed within the combination unit comprises a short range wireless protocol transceiver for wirelessly communicating with an external mobile electronic device. 5. The system of claim 1, wherein the combination unit further comprises a pressure transducer. 6. The system of claim 1, further comprising a mobile hand held electronic device including at least one table for correlating a sensed LFG variable to a recommended valve position for the LFG flow control valve. 7. The system of claim 6, wherein the wireless transceiver within the combination unit wirelessly communicates with the mobile hand held electronic device. 8. The system of claim 1, wherein the wireless transceiver is configured to receive wireless signals from a remote source to enable control by the controller of the LFG flow control valve by the electronically controlled valve actuator. 9. The system of claim 8, wherein the controller is configured to implement at least one of the following schemes: a scheme to maintain a constant LFG flow rate;a scheme to maintain a constant level of vacuum applied to the well head;a scheme to maintain a desired combination of LFG flow rate and vacuum; ora scheme to maintain a desired combination of LFG flow rate and vacuum, also taking into consideration at least one of barometric pressure and ambient air temperature. 10. The system of claim 1, wherein the system wirelessly accesses a cloud based data source, using the wireless transceiver, for obtaining historical, LFG flow related data associated with the wellhead. 11. The system of claim 6, wherein the mobile hand held electronic device includes: LFG data including LFG well head vacuum and pressure, LFG gas quality data, LFG gas temperature; andsite and ambient data readings including at least one of: barometric pressure;air temperature; anda geospatial location of a LFG well head. 12. The system of claim 1, wherein the wireless transceiver of the combination unit is responsive to at least one of: satellite signals; orcellular signals. 13. A self-regulating, landfill well control system for automatically controlling a parameter associated with an above ground level located wellhead associated with a landfill well at a landfill, and where a landfill gas (LFG) is flowing through the wellhead, the system comprising: a combination unit having a housing and operably coupled to and physically supported from the wellhead at a location above the ground level, the combination unit having: an electronically controlled valve actuator within the housing for controlling a LFG flow control valve, to thus control a LFG flow through the wellhead;a measurement element disposed within the housing operably associated for measuring the parameter to be controlled;a pressure transducer for measuring pressure within the wellhead;a controller for controlling the electronically controlled valve actuator, based on measurements obtained using the measurement element and the pressure transducer, to adjust a setting of the LFG flow control valve to achieve a desired control point setting for the parameter, and to automatically adjust the LFG flow control valve as needed to maintain the desired control point setting for the parameter; anda wireless transceiver operably associated with the controller for wirelessly receiving at least one of data and commands from a remote subsystem which assist the controller in controlling the electronically controlled valve actuator. 14. The system of claim 13, wherein the parameter comprises LFG flow. 15. The system of claim 13, wherein the parameter comprises vacuum applied to the wellhead from an external vacuum source. 16. The system of claim 13, wherein the parameter is a combination of at least two of LFG flow, vacuum, barometric pressure and ambient air temperature. 17. A method for forming a self-regulating, landfill well control system for automatically controlling a parameter associated with an above ground level wellhead associated with a landfill well at a landfill, and where a landfill gas (LFG) is flowing through the wellhead, the method comprising: using an electronically controlled valve actuator to control a LFG flow control valve, to thus control a LFG flow through the wellhead;using a measurement element operably associated with the wellhead to measure the parameter to be controlled; andusing a combination unit having a housing, the housing being coupled to and physically supported from the wellhead above the ground level, and including a controller and a wireless transceiver in communication with the controller, both the controller and the wireless transceiver being housed within the housing, the controller controlling the electronically controlled valve actuator based on data obtained using the measurement element, and adjusting a setting of the LFG flow control valve to achieve a desired control point setting for the parameter; andthe controller automatically controlling the electronically controlled valve actuator to adjust the LFG flow control valve as needed to maintain the desired control point setting for the parameter. 18. The method of claim 17, wherein the operation of using a measurement element to measure the parameter to be controlled comprises using a measurement element to measure at least one of: LFG flow through the wellhead;vacuum at the wellhead; ora combination of at least two of LFG flow, vacuum, barometric pressure and ambient air temperature.