Patent ID: 11946007
Assignee: PEKING UNIVERSITY
Field: Chemical engineering (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 6:
7. The natural gas separation and purification and mercury collection system for oil and gas wells according to claim 5, wherein each of the pressure buffer mechanisms comprises a buffer tank, an elastic diaphragm, a bearing keel, a pressure equalizing pump, a counterweight, a plurality of guide rails, pressure sensors, and a wedge; an axis of the buffer tank is perpendicular to the horizontal plane, and the buffer tank is a cylindrical closed chamber structure with a rectangular axial section; a side wall of the buffer tank is provided with at least one second gas inlet; the at least one second gas inlet uniformly surrounds the axis of the buffer tank, and a distance between the at least one second gas inlet and a bottom of the buffer tank is 5-15% of a height of the buffer tank; a top of the buffer tank is provided with a gas guide port and communicated with an external pipe through the gas guide port; the bearing keel is embedded in the buffer tank and is a spoke-shaped frame structure coaxial with the buffer tank; the bearing keel is slidably connected to an inner side of the buffer tank through the plurality of guide rails; the elastic diaphragm is wrapped around the bearing keel; the elastic diaphragm and the bearing keel jointly divide an inner space of the buffer tank into a pressure regulating chamber and a gas discharge chamber from top to bottom, wherein the pressure regulating chamber and the gas discharge chamber are independent of each other; the pressure equalizing pump is located on the bearing keel and coaxial with the bearing keel; the pressure regulating chamber and the gas discharge chamber are communicated with each other through the pressure equalizing pump; the counterweight is a circular structure coaxial with the bearing keel and is connected to an upper end surface of the bearing keel; at least two gas pressure sensors are respectively connected to the upper end surface and a lower end surface of the bearing keel and electrically connected to the driver circuit; at least one wedge is embedded in the gas discharge chamber and connected to the top of the buffer tank; and the at least one wedge has an axis perpendicular to the elastic diaphragm, and has a height not less than 10 cm.