| CPC B01D 19/0068 (2013.01) [B01D 19/0057 (2013.01)] | 10 Claims |
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1. A compact L-shaped cylinder-cone combined tubular three-stage axial flow degassing device, wherein a cylindrical tube swirling generator and a microporous uniform mixer are respectively connected to an upper part and a lower part of a first-stage degasser by means of flanges, a second-stage degasser connects the microporous uniform mixer and a third-stage degasser to be one piece by means of flange connection, and the three-stage axial flow degassing device performs in sequence a first-stage segmental vertical high speed swirling degassing operation, a second-stage horizontal vane wheel swirling generating rapid axial flow degassing operation, and a third-stage vertical reversing deep degassing operation, comprising:
a cylindrical tube swirling generator; wherein: the cylindrical tube swirling generator forms a vertical high speed gas-containing swirling, and comprises a spiral liquid inlet tube, a swirling generating tube, a first-stage exhaust tube and a tube connecting sleeve; the swirling generating tube adopts a thick-walled cylindrical tube having a closed top end, an inner wall of the swirling generating tube is milled with reduced swirling generating teeth, and a reduced spiral tooth slot is formed between adjacent reduced swirling generating teeth, serves as a flow channel of a gas-containing fluid and forms a vertical high speed swirling field; the swirling generating tube forms a swirling generating liquid inlet hole, a wedge-shaped groove of the spiral liquid inlet tube is fixed to the swirling generating liquid inlet hole of the swirling generating tube by means of circumferential welding, the first-stage degasser comprises a first-stage gas collecting tube, a tube connecting sleeve connects the first-stage exhaust tube and the first-stage gas collecting tube to be one piece by means of threaded connection, and an outer ring surface of the tube connecting sleeve and a socket hole in the topmost flange of the swirling generating tube are fixed by means of circumferential welding;
a first-stage degasser; wherein: the first-stage degasser removes most of gas phase carried by the gas-containing fluid and forms a primary gas and a primary fluid, and comprises a cylinder-cone degassing tube, a swirling stopping rectifier, the first-stage gas collecting tube and a first-stage liquid discharge tube; the cylinder-cone degassing tube adopts a combination of a cylindrical tube and a conical tube, both ends of which are connected, and connects the first-stage liquid discharge tube and the swirling generating tube to be one piece by means of flange connection, and the cylinder-cone degassing tube is composed of a lower cylindrical degassing tube segment, a conical degassing tube segment and an upper cylindrical degassing tube segment and axial lengths of the lower cylindrical degassing tube segment, the upper cylindrical degassing tube segment and the conical degassing tube segment increase in sequence; the swirling stopping rectifier adopts a sheet structure, and is formed by welding a swirling stopping cone, a rectifying rod and rectifying vanes, wherein the swirling stopping cone adopts a conical shell, the top end of which is closed, while the gas collecting hood adopts a conical shell with a hole on the top end, each rectifying vane is provided with a guide groove along a radially inner side of the rectifying rod, all rectifying vanes are evenly arranged along an outer ring surface of the rectifying rod, and the rectifying vanes realize axial fixation of the swirling stopping rectifier in the upper tube cavity of the first-stage liquid discharge tube according to interference fit; the first-stage gas collecting tube is formed by welding a gas collecting cylindrical tube segment and a gas collecting hood, the first-stage liquid discharge tube adopts a T-shaped thick-walled tube with a closed bottom end, and comprises an upper liquid inlet tube segment, a lower settling tube segment and a right liquid discharge straight tube segment, and the right liquid discharge straight tube segment is connected to a uniform mixing tube to be one piece by means of flange connection;
a microporous uniform mixer; wherein: the microporous uniform mixer forms a gas-liquid uniform mixed flow containing small bubbles, and comprises a micropore tube, a uniform mixing tube, a left limit disc, a right limit disc and a mixed flow buffer tube; the micropore tube adopts a ceramic circular tube, reduced micropores on the micropore tube take a squirrel-cage and are layered at equal intervals along an axial direction of the micropore tube, each reduced micropore is formed by a combination of a large conical micropore, a cylindrical micropore and a small conical micropore from within along the radial direction of the micropore tube, axial lengths of which decrease in sequence, the left micropore ring clip of the micropore tube and a left limit slot of the left limit disc, as well as the right micropore ring clip thereof and a right limit slot of the right limit disc are in precise fit, thereby realizing two-way limit and axial fixation of the micropore tube; the second-stage degasser comprises an axial flow degassing tube, the uniform mixing tube adopts a left-end reduced thin-walled cylindrical tube uniform mixing tube, the uniform mixing tube and the mixed flow buffer tube are connected to the first-stage liquid discharge tube and the axial flow degassing tube as one piece by means of flange connection, an inner wall of the uniform mixing tube is formed by a combination of a left uniform mixing cylindrical surface, and an uniform mixing conical surface and a right uniform mixing cylindrical surface, wherein an uniform mixing ring cavity is formed between the uniform mixing conical surface and the right uniform mixing cylindrical surface of the uniform mixing tube and the outer ring surface of the micropore tube; a hole wall of the round hole in the left limit disc is milled with a left limit slot, and each of uniform mixed flow slotted holes is uniformly arranged along a peripheral direction of a slot edge of the right limit slot;
a second-stage degasser; wherein: the second-stage degasser removes most of the gas phase carried by the gas-liquid uniform mixed flow, forms a secondary gas and a secondary fluid, and comprises an axial flow degassing tube, an axial flow vane wheel, a vane rectifier, a second-stage gas collecting tube and a second-stage liquid discharge tube; the axial flow degassing tube is connected to the second-stage liquid discharge tube to be one piece by means of flange connection, the axial flow vane wheel is formed of an axial flow rod and swirling generating vanes formed thereon, and two side ends of the axial flow rod respectively adopt a semi-ellipse spherical surface and a conical surface, the swirling generating vanes realize axial fixation of the axial flow vane wheel inside of the axial flow degassing tube cavity according to the interference fit, a contour line of the swirling generating vane is a spiral line having a gradually decreasing pitch from left to right, spiral axial flow vane grooves are formed between adjacent swirling generating vanes, and the gas-liquid uniform mixed flow inside of horizontal rapid axial flow field constantly speeds up, and is reversed and adjusted into a plurality of horizontal rapid gas-containing axial flows; the vane rectifier is formed of axial flow vanes which are evenly welded along an outer ring surface of the second-stage gas collecting tube, and the axial flow vanes realize the axial fixation of the vane rectifier and the second-stage gas collecting tube in the axial flow degassing tube cavity according to the interference fit, the second-stage gas collecting tube is formed by a combination of a gas colleting thin conical tube, a gas collecting thick conical tube and a gas collecting bent tube, and the gas collecting thick conical tube adopts a tube shell having an inner tube wall with a cylindrical surface and an outer tube wall with a conical surface; the second-stage liquid discharge tube adopts a right-end reduced T-shaped thick-walled tube, and is composed of a left liquid inlet tube segment, a right reduced liquid discharge tube segment and an upper liquid discharge straight tube segment, wherein the upper liquid discharge straight tube segment is provided with a disc connecting sleeve inside of a tube cavity thereof; and
a third-stage degasser; wherein: the third-stage degasser removes a small amount of remaining liquid phase carried by the secondary gas, forms a tertiary gas and a tertiary fluid, and comprises a wet gas reversing tube, a liquid collecting tube, a third-stage exhaust tube, a third-stage liquid discharge tube and a disc connecting sleeve; the wet gas reversing tube adopts a three-way T-shaped thin-walled tube and is formed by welding a wet gas transportation tube segment and a reversing tube segment, the wet gas transportation tube segment and the liquid collecting tube form a double-tube buffer ring cavity and form a vertical reversing scrubbing field, and both sides of an inner wall of the reversing tube segment are milled with reversing conical cavity; the liquid collecting tube and a disc connecting sleeve are connected to the third-stage exhaust tube and the second-stage liquid discharge tube as one piece by means of flange connection and socket flanges, and a lower part of a tube wall of the liquid collecting tube is drilled with a round hole and is welded together with the third-stage liquid discharge tube, and the third-stage exhaust tube adopts two-end flanged reduced short tube; the disc connecting sleeve is provided with a socket flange and a connecting sleeve in sequence from top to bottom, and the connecting sleeve realizes connection of the disc connecting sleeve and the wet gas reversing tube according to interference fit, and connects the disc connecting sleeve and the second-stage gas collecting tube to be one piece by means of thread connection.
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