RU58380U1 - VORTEX GAS-DYNAMIC SEPARATOR - Google Patents

Abstract

The VGS1 vortex gas-dynamic separator, designed to capture droplet liquid from a gas stream, contains a vertical cylindrical body, an outlet and drain pipe, an input device that provides a tangential flow of the shared stream into the body, and an inner annular separation element consisting of curved separation plates, the separation plates made arcuate and oriented convex to the axis of the device and towards the direction of flow, adjacent plates form nozzle channels all, overlapping by 20 ÷ 50% of their width, the angle between the normal to the convex side of the plate at the outer edge with a tangent to the circle connecting these edges directed downstream, and the angle between the tangent to the concave surface of the plate at the inner edge directed downstream, and the normal to the convex surface of the adjacent plate at the intersection with this tangent is 90 ° ÷ 180 °.

Description

The invention relates to the oil, gas, engineering, food, chemical and other industries and can be used to trap drip liquid from a gas stream.

A device for collecting particulate matter is known [US Patent No. 5221229 A, 1993], comprising a housing with a tangential nozzle for supplying a stream, a coaxial separation element of a smaller diameter located in the upper part of the housing and consisting of vertical guide vanes oriented so that the direction of rotation of the flow as it moves towards the axis changes to the opposite, the axial nozzle for the gas outlet connected to the separation element, and the nozzle for the output of the separated particles in the lower part of the housing, wherein the first separation step is carried out in a centrifugal force field on the inner surface of the housing, and a second, inert, carried out on the plates of the separation element because of a sharp change in the gas flow direction.

The disadvantage of this device is the large hydraulic resistance associated with a change in the direction of twist in the separation element.

Known devices for the deposition of fine liquid and solid particles [RF patent No. 2136350, B 01 D 45/12, 1999; RF patent No. 2188062, B 01 D 45/12, 2002; RF patent No. 2221625, B 01 D 45/12, 2004], containing a vertical cylindrical body, a pipe for supplying gas and a reflector for turning the incoming flow in the tangential and vertical directions, horizontal diaphragmed partitions with one or more internal separation mounted on them elements with vertical or located along a truncated cone separating plates, oriented in such a way that the flow entering the element retains the direction of rotation. One of these plates contains gutters for draining the liquid. In these devices, the separation plates are profiled and

They are oriented in such a way that the mixture to be separated enters the slotted channels between adjacent plates of the separation element, the liquid passes in these channels from the outer surface of one plate to the inner surface of the other up to the plate on which gutters are provided for draining the liquid. In this case, compared with the previous one, the hydraulic resistance is reduced.

The disadvantage of these devices is the liquid overload of the plate with drain troughs, the overlapping by these troughs of a part of the space in the first separation stage and the complexity of the design.

The closest in technical essence to the claimed device is a device for collecting finely dispersed liquid and solid particles from a gas stream [RF patent No. 2244584, B 01 D 45/12, 2005], containing a vertical cylindrical body, an input device located in its upper half, a drain pipe in the bottom and a gas outlet pipe in the upper cover, a horizontal partition and a separation element fixed between this partition and the upper cover, composed of an annular package of curved separation plates n, and adjacent plates in the overlapping region form slotted channels, and opposite edges of the plates are directed tangentially to the outer and inner circumferences of the separation element. When the device is operating, the flow entering the housing through the input device is deflected tangentially and downward. As a result of the rotation of the flow, the first stage of centrifugal separation is carried out in the space between the housing and the separation element. Further, the flow with the remaining finely dispersed phase, without changing the direction of rotation, smoothly enters the slotted channels formed in the overlapping zone of adjacent plates of the separation element, and the finely dispersed phase, smoothly passing from the outer edge of one plate to the inner surface of the other, flows downward along the inner surface to the horizontal the lid and from there it goes to the drain pipe.

The profiling of the plates, carried out in this device, involves reducing the input hydrodynamic resistance of the separation element. However, the hydrodynamic resistance associated with the slotted shape of the channel in the area of overlap of the plates remains large, and the efficiency

separation is insufficient, which is manifested in the secondary disruption of droplets from the surface of the plates at high fluid loads.

The task of the invention is to increase the degree of separation on the separation plates and reduce the hydrodynamic resistance of the apparatus.

The problem is solved in that in the device the Vortex gas-dynamic separator VGS1, containing a vertical cylindrical body, an outlet pipe in the top cover and a drain pipe at the base, a horizontal partition, an input device that provides a tangential flow of the incoming stream into the body, and an inner annular separation element, consisting of curved separation plates fixed between the top cover and the horizontal partition, according to the invention, the separation plates are made arc are sharp and oriented convex to the axis of the device and towards the incoming flow, adjacent plates overlap, forming nozzle channels for gas inlet, the overlap of the plates is from 20 to 50% of their width, the angle between the normal to the convex surface of the plate at the outer edge is tangent to the circle connecting these the edge directed downstream is 90 ° ÷ 180 °, and the angle between the tangent to the concave surface of the plate on the inner edge directed downstream and the normal to the convex surface of the adjacent plate at the intersection The ratio with this tangent is 90 ° ÷ 180 °.

The problem is also solved by the fact that, according to the invention, the plates of the separation element are located along the surface of a vertical truncated cone (with a smaller base down) with an angle of inclination of up to seven degrees.

Figure 1 presents a General view of the device, figure 2 is a section along aa and figure 3 is a layout of separation plates.

The gas-dynamic vortex separator VGS1 contains a housing 1, a top cover 2 with an outlet pipe 3 connected to it, an input device comprising an inlet pipe 4 with a deflector 5, a drain pipe 6, a horizontal diaphragm wall 7 and a partition 8, an internal

the separation element 9, composed of profiled plates 10, mounted between the top cover 2 and the horizontal partition 7.

The vortex gas-dynamic separator VGS1 operates as follows. The gas containing the dropping liquid enters through the inlet pipe 4 into the housing 1, where with the help of a deflector 5 it is deflected onto the wall of the housing and down to a spiral path. The inlet pipe 4 with a deflector 5, the housing of the device 1 and the space between the housing 1 and the inner separation element 9 are used to carry out the first stage of separation in the field of centrifugal forces supported by the flow swirl. At the first stage, jets and the largest drops of liquid are deposited on the device body. There is also dispersion of the liquid on the reflector and liquid separation when it enters the device in the "plug" mode. Further, the gas stream with the remaining finely dispersed phase, while maintaining rotation, is distributed into the jets entering the nozzle channels located along the rotation of rotation between the arcuate separation plates.

Moreover, due to the declared orientation of the plates, the flow entering the nozzle channel falls onto the convex side of the plate so that the flow direction makes an obtuse angle with its normal, and this angle should be sought to be close to 180 °. At the exit from the nozzle channel, the stream flows from the concave edge of the plate with a jet, which then hits the convex part of the adjacent plate, and the direction angle of this stream with the normal to the convex surface at the point of incidence should also be made as close as possible to 180 °. In particular, in the implemented devices, these angles were from 145 ° to 170 ° (see figure 3). Thus, on the convex side of the plate, a change in the direction of the gas flow occurs twice, resulting in inertial separation with the formation of a liquid film. The film of liquid under the action of centrifugal force is displaced to the periphery of the plate, and under the action of gravity flows down to the partitions 7 and 8 and further to the drain pipe 6. Gas, continuing to move to the axis, is directed to the output pipe 3. The formation of a liquid film and its displacement on the periphery provides a high degree of separation. Despite the fact that the gas runs onto the separation plates at a large angle (shock input), which increases the hydrodynamic resistance,

the nozzle shape of the channels of the separation element provides a significantly lower resistance compared to the slotted channels used in known devices, as a result of which the overall resistance of the separation element is lower than in devices with slotted channels and a smooth (unstressed) input.

The location of the plates 10 along the surface of the vertical truncated cone (with a smaller base down) leads to the fact that the gas inlet velocity to the separation element increases downward (the peripheral gas velocity in cyclone-type devices increases with decreasing radius), where the liquid film thickens due to swelling from above. The increase in speed in this area contributes to a better compression of the liquid film to the plate, its removal on the periphery of the separation element and thereby improves separation.

The use of the invention allows to reduce the resistance of the separation element and to carry out the separation process with high liquid loads.

Claims (2)

1. Vortex gas-dynamic separator (GHS), comprising a vertical cylindrical body, an outlet pipe in the upper cover and a drain pipe at the base, a horizontal partition, an input device that provides a tangential flow of the incoming stream into the body and an inner annular separation element consisting of curved separation plates, fixed between the top cover and the horizontal partition, characterized in that the plates of the separation element are made arcuate and oriented convex n meeting the incident flow and to the axis of the device, adjacent plates overlap by 20 ÷ 50% of their width, forming nozzle channels for gas inlet, the angle between the normal to the convex surface of the plate at the outer edge with a tangent to the circle connecting these edges directed along the stream is 145 ÷ 180 °, and the angle between the tangent to the concave surface of the plate on the inner edge directed downstream and the normal to the convex surface of the adjacent plate at the intersection with this tangent is 145 ÷ 180 °. 2. The vortex gas-dynamic separator according to claim 1, characterized in that the plates of the separation element are located along the surface of the truncated cone, with a smaller base downward, with an inclination angle of 0 ÷ 7 °.