PT82024B - SEPARATOR GAS-WATER - Google Patents

Abstract

A gas-water separator has a generally cylindrical partition wall member 34 disposed to form an annular space 37 between the member 34 and a casing 6, 8 located outside the member 34. Swirl-inducing vanes 38 are disposed in the annular space, which is connected to an inlet 22, a separating chamber 7 having a drain valve 43, 44 for separated water and a gas outlet 23. Each vane 38 includes a radially projecting longitudinal wall portion 39, an obliquely downwardly inclined wall portion 40 and a spiral wall portion 41 connected at their lower ends to a radial end wall portion 42. <IMAGE>

Description

GAS-WATER SEPARATOR f

it is in communication with an inlet opening (22) with the chamber (7) of a bleed valve and an outlet opening (23). According to the present invention, the gas-water separator includes sloping and sloping walls and spiral walls, each of said spiral walls connecting at the bottom end of the corresponding sloping wall to a radial end wall of in order to determine with the latter the formation of a sharp edge.

Field of application of the present invention relates to a separator suitable to be mounted in a tubular conduit for gases, such as vapor of any substance or compressed air, in order to separate water (for example condensates) from the gas . More precisely, it concerns a gas-water separator for separating the gas from the water from one another by means of the action of a centrifugal force induced by the animated fluid of a rotating movement.

In this type of gas-water separators, a rotation movement is given to the fluid in the upper part of an enclosure and the water droplets contained in the gas are projected outward by the action of the centrifugal force resulting from the rotation movement of the fluid, being therefore separated from the sinus of the fluid. The gas is directed to an outlet opening while the water droplets separated from the fluid are sent out of the housing through a bleed valve to which it is located inside and at the bottom of the housing.

Prior art

According to the construction of conventional gas-water separators, there is a cylindrical separating wall system that is placed inside and in the upper part of a housing in order to determine the formation of an annular space between the separating wall system; dora and the enclosure in which the separating wall system is placed, with a series of inclined blades, which promote rotation movement, which are arranged radially in the annular space, and the upper and lower parts of the annular space and tubular passage

interior of the separator wall system in communication with an inlet opening, with a purge valve chamber and an outlet opening, respectively. In this form of construction, the fluid that enters through the inlet opening is forced to rotate inside the annular space thanks to the movement that is given by the rotation blades, that is, blades that promote rotation, that is, blades capable of giving a rotation movement to the gas that enters the separator, so that the drops of water are projected outwards by the action of a centrifugal force. The water droplets thus separated will drain to the bottom of the housing and then be discharged to the outside via the bleed valve. In a central area of the animated rotating current, the gas moves towards the outlet opening through the inner tubular passage of the separating wall system.

Problem to be solved by the invention

In the case of the conventional type structures mentioned above, only a part of the water droplets are conducted to the outlet opening even though the animated rotation current has intensified, and it has proved impossible to increase the efficiency gas-water separation beyond a certain limit.

The reason for this limitation is the fact that the process is based only on natural law, which determines that when it is animated by a rotating movement, the fluid is pushed out further by the action of a centrifugal force the greater its mass of way that very small water droplets return again from outside to inside along the surface being

therefore dragged to the outlet opening together with the gas.

The technical basis of the present invention is the use of a supplementary system, capable of catching the drops of water and throwing those drops outside, in a gas-water separator equipped with rotating blades.

How to solve the problem

According to the solution proposed by the present invention to solve the aforementioned problem, sloping walls are formed in an oblique and descending manner and spiral walls are formed on an outer peripheral wall of a cyclic separating wall system, with each of the spiral walls projecting. gradually from the inside outwards from the upper end of each of the said inclined walls and towards the lower end of the respective inclined wall and connect in the region of the lower end of the corresponding inclined wall to a radial end wall in order to determine with the latter the formation of a sharp edge.

Operation of the apparatus according to the invention, the aforementioned device operates in the manner which will be described below.

An annular space is formed around the outer periphery of the cylindrical separating wall system and the sloping oblique and descending walls will be placed inside the said annular space, so that the fluid is forced to change direction, moving it runs along an oblique and descending direction, when it passes through said annular space. Therefore, the fluid will rotate inside the annular space due to its continuity and this rotation movement will extend to the parts located above and below the inclined walls, that is, the fluid enters the annular space already animated with rotation movement and leaves also animated of rotation movement.

Since the spiral walls project from the inside out gradually from the upper end of each of the said inclined walls and towards the lower end of the respective inclined wall, the fluid will move in a direction more pointed outward from the that which corresponds to a direction tangential to the annular space and is therefore projected in better conditions against the inner wall of a box within which the characteristic device of the invention is placed. In addition, and since the width of the annular space becomes smaller and smaller as we move from the upper end to the lower end of the inclined walls, the speed of the rotating flow gradually increases until reaching the maximum value in the lower end zone.

In addition, and since each of the spiral walls will connect in the area of the lower end of the corresponding wall inclined to a radial end wall in order to determine with the latter the formation of a sharp edge, the width of the annular space suddenly increases in the zone of the annular space it suddenly increases in the zone of these end walls. Consequently, when the fluid is animated by a rotating movement, the pressure near the end walls drops and the water droplets join one another in the area of the connecting edges between the spiral walls and the end walls and are then dragged by the strong animated fluid current of rotational movement, the speed of which reaches its maximum value in the area of those connection edges mentioned above, and thrown against the inner wall of the housing within which the characteristic device of the invention is placed.

Effects of the invention The present invention produces the effects which will be referred to below.

Not only does a gas-water separation take place thanks to the action of a centrifugal force induced by the rotational movement of which the fluid is animated, but also the drops of water will be forced to join each other in the area of the connecting edges between the spiral walls and end walls and the speed of the rotating fluid stream will reach its maximum value in the area of said connecting edges by pulling the water droplets from said area of the connecting edges and projecting against the inner wall of the enclosure within which the characteristic device of the invention is placed. As a result, the efficiency of the gas-water separation becomes extremely high.

It is not just a matter of increasing the speed of flow of the rotating fluid stream, but of making the width of the annular space to become minimal in the area of the lower ends of the inclined walls so that the speed of flow of the rotating fluid stream becomes maximum at important points, namely in the area of the lower extremities of the inclined walls. Therefore, the rotating flow of the fluid is relatively little turbulent upstream and downstream of the said zone, thus preventing water droplets from being dragged into the outlet opening with the gas or the accumulated water surface in the zone. bleed valve may be disturbed and thus cause the bleed valve to malfunction.

Embodiment of the invention

If the following recommendations are taken into account, it will be possible to obtain a better functioning by the characteristic device of the invention and consequently better results.

If, towards the top side of the upper end of each of the inclined walls, a longitudinal wall is formed that projects radially from the outer peripheral wall of the separating wall system, the fluid that enters the annular space animated by a rotating movement it will hit the longitudinal wall, so that part of the drops of water will hit the longitudinal walls and adhere to those same longitudinal walls thus separating from the gas.

If at least the outer peripheral surface of the separating wall system that includes the inclined walls and the spiraled walls is formed so as to have a roughness similar to that of the pear shell, the water droplets will more easily adhere to said outer peripheral surface and the surface velocity of scouring (rotation of the rotating fluid stream will experience a moderate deceleration in the vicinity of said surface, thus making it possible that the water droplets can stick to said outer peripheral surface of the separating primer system. of water that are thus clinging to the outer peripheral surface of the separating wall system will join each other in the area of the connecting edges, as previously described, and will then be thrown against the inside wall of the enclosure inside of which is located the device characteristic of the In this way it is possible to separate the water droplets from the sinus of the gas causing them to adhere to a wall whose surface, precisely the one on which the said water droplets will settle, presents a roughness similar to that of the pear peel.

If the outer periphery of the area of the lower end of the separator wall system gradually protrudes from the inside as it descends in order to reduce the distance in relation to the interior surface of the separator box or enclosure, the flow speed of the rotating current will increase even more in that area, promoting an additional separation of water from the gas sinus, there will be more drops of water that will be thrown against the inner wall of the box or enclosure inside which the characteristic device of the device is placed. present invention. In this vessel, the desired effect and type of operation will be achieved if the angle of inclination of the outer periphery of the lower end zone

the partition wall system in relation to the vertical has a value between 25 and 50 degrees. More precisely, we can say that the best results are those that are obtained when said.

The description that will be presented next concerns a model of eralization which is presented in the accompanying drawings and which illustrates a concrete example of the characteristic device of the invention.

Brief description of the drawings

Fig. 1 is a sectional view of a gas-water separator according to the present invention combined with a reduction valve;

Fig. 2 is a longitudinal sectional view of a separating wall system;

Fig. 3 is a sectional view, the section having been found along line III-III of Fig. 2; and Fig. 4 is a perspective view of the partition wall system.

embodiment shown in Fig. 1 is an integral combination of a separate gas-water

(A), according to the present invention, with a reduction valve (B) for steam.

The box, or enclosure, of the assembly comprises a box (2) within which a pressure regulating spring (1) is enclosed; a box (4) inside which a pilot valve (3) is closed; a body (6) within which the main valve (5) is closed; the separator box (8) which determines the formation of a gas-water separation chamber (7); and a bottom cover (9). These components are formed by means of casting.

Between the spring box (2) and the pilot valve box (4) there is a diaphragm (10) formed by a metal sheet.

The lower end of the pressure regulating spring (1) is in contact with the upper surface of the diaphragm (10) through a diaphragm disc (11), while the upper end of a capsule (13) attached to the stem (12) of the pilot valve (3) is in contact with the lower surface of the diaphragm. The space above the diaphragm (10) is in communication with the outside through a passage (14), while the space below the diaphragm (10) is connected via a passage (15) to an opening output (23) which will be described in due course.

There is a adjusting screw (17) which is fixed to the housing of the box (2) of the spring by means of a stainless steel bushing (16) and which is immobilized by means of a lock nut (18). There is a steel ball (20) that is placed between the adjusting screw (17) and the seat (19) of the spring (11) which is mounted on the upper end of the pressure regulating spring (1).

The part of the adjusting screw (17) that protrudes outwards is covered with a protective cover (21) that is removably connected to the housing (2) of the spring by means of a screw connection.

body (6) is formed with an entrance opening (22) and an exit opening (23). The entrance opening (22) and the exit opening (23) are separated from each other by means of a horizontal wall (24) and establish communication with each other through the passage opening (25) existing in a seat of valve that is fixed by means of thread to the horizontal wall (24). The main valve (5) is placed under the passage opening (25) at the same time that it is forced to remain against the respective seat due to the elastic force that is exerted on it by a helical spring. The upper end of the main valve (5) is connected to a plunger (26).

The pilot valve (3) is placed between a passage (27) that will end in the area of the inlet opening (22) and a passage (28) that will end in a space formed above the piston (26). The pilot valve (3) comprises a stem (12) for sliding movement through a seat (29) and an element (30) that is connected to the lower end of the stem (12) of the pilot valve itself (3) ). The pilot valve (3) is pushed upwards by means of a spring. In the passage (27) a screen (31) is mounted.

plunger (26) is suitable for sliding inside a cylinder (32) that is fixedly mounted to the inner periphery of the body (6), and on the outer periphery of the plunger (26) two annular slots are formed inside of which two hoops made of polytetrafluoroethylene (PTFE) are housed and kept under tension

by means of springs. The plunger (26) is still equipped with an orifice (33) that will establish a communication between the upper and lower surfaces of the plunger in order to allow a certain amount of fluid to pass from the top to the bottom of the ^r plunger to be able to perform a control pressure.

Around the main valve (5) of the erection valve (B) there is a system (34) of double partition wall of generally cylindrical shape. This system comprises a perfectly cylindrical outer wall which is situated at a lower level than that to which an approximately cylindrical inner wall is located which is slightly divergent in the region of its upper and lower ends. A screen (35) is placed on the outside of the separating wall system (34). Inside the separating wall system (34) is a guide (36) placed? around the central axis of the system (34), to which it is connected by means of rays, which is formed jointly with the system (34), that is, in order to constitute together with it a single piece, and which is to guide the bottom of the main valve (5). The inlet opening (22) is connected through the sieve (35) to an annular space (37) that is formed between the two cylindrical walls of the separator wall system (34), at the same time as the inside of the separator wall system (34) is connected to the outlet opening (23) through the through opening (25) of the main valve (5).

60 & 00 '] ·· (j

14In the annular space (37) there are rotating blades (38), that is, blades capable of providing a fluid rotation movement that enters the separating wall system, which are formed jointly with the system (34) separating wall, that is, in order to form a single piece with it. The separating wall system, including the blades (38), is formed by casting according to the lost wax process and the surface of its walls has a rough finish similar to the roughness of the pear peel. It is evident that another casting method or a cutting forming process or any other process can be used, provided that at least the outer peripheral surface of the walls of the separating wall system has a rough finish.

According to the method of casting by the lost wax process adopted in this embodiment, the surface roughness of the walls of the separating wall system is 15 to 60 yim in terms of a maximum height R _m3V according to JIS (B 0601). If the surface of the walls has a rough finish such that the roughness is not less than 10R _v then a good separation effect will be achieved. The surfaces that are only expected to have a roughness similar to that of the pear peel are indicated in the figures by the reference letter (C).

As shown in the enlarged scale in Figs. 2 to 4, each of the rotating blades (38) consists of a longitudinal wall (39) that projects radially from the upper end of the inner cylinder of the separating wall system (34) and towards the upper end of the cylinder of said separating wall system (34), by an inclined wall (40) with a downward sloping

it develops from the lower end of the longitudinal wall (39) being placed between the outer and inner cylindrical walls of the separating wall system and by a spiral wall (41) which is formed on the upper surface of the inclined wall (40) developing in a spiral shape and towards the outer cylinder from the inner cylinder. In the annular space (37) five rotation blades (38) are formed. One end of the end of the spiraled wall (41) is connected to a radial terminal wall (42) in order to determine with it the formation of a sharp edge.

The lower part of the inner cylinder of the separator wall system (34) gradually expands as it descends and ends in the vicinity and at a predetermined distance from the inner wall of the outer cylinder. The angle of inclination Θ of this lower part of the inner cylinder in relation to the vertical is 35 degrees. If the inclination angle 0 has a value between 25 and 50 degrees, it will be possible to obtain a good separation effect.

The lower cover (9) is fixed by means of screws to the lower end of the box (8) of the gas-water separator (A) in order to determine with it the formation of the chamber (7) of the purge valve. A spherical float (43) is placed inside the chamber (7).

At the inner end of a discharge or bleed opening (45) in the lower cover (9), the seat (44) of the bleed valve is fixed. The float (43) is covered by a bell (46) which has a connection opening (47) formed at the bottom of the bell. The reference number (48) designates a breathing hole practiced at the top of the

float bell (46).

fluid that enters through the inlet opening (22) is animated with a rotation movement that is given by the inclined walls (40) of the rotation blades (38). The drops of water that are contained within the fluid are thrown out and separated by the action of the centrifugal force. The longitudinal walls (39) cause the fluid just entered the separator wall system to fall perpendicularly and to deflect the animated current of rotation movement that is created by the inclined walls (40), decreasing the flow speed of the animated current of rotation movement and forcing this current to deflect further down. At the same time, part of the water droplets will hit the longitudinal walls (39) and stick to the surface of these same longitudinal walls (39).

The spiral walls (41) serve to direct the rotating current outward rather than in the tangential direction of the annular space (37). In the region of the lower end of the inclined walls (40) the width of the annular space (37) becomes minimal and the flow rate becomes maximum. Since the end ends of the spiral walls (41) are connected to the radial end walls (42) in order to determine the formation of sharp edges, the width of the annular space (37) will experience a sudden expansion from of the connecting edges between the spiral walls (41) and the end walls (42). Consequently, the animated fluid of rotational movement will experience a pressure reduction in the areas located near the end walls and the drops of water that have stuck to the surface of the spiral walls will accumulate in the area of the connecting edges.

The water droplets thus accumulated will be pulled from the area of the connecting edges by the strong flowing current

of the rotation movement and thrown against the inner wall of the box (8) (including also against the inner wall of the outer cylinder of the separator wall system (34)).

The water droplets thus separated will flow along the inner peripheral wall of the outer cylinder of the separator wall system (34) and the housing or box (8). The gas that has passed to the lower end of the separator wall system (34) will pass inside said separator wall system (34) and move towards the main valve (5) of the reduction valve (B) then salts towards the outlet opening (23), while the separated water will penetrate the inside of the float bell (46) through the connection opening (47) of this same bell. At that precise moment, the gas that is present inside the bell (46) of the float exits through the breathing hole (48). The float (43) rises and falls following the water level, opening and closing the vent opening (44) of the bleed valve, allowing no other than water to escape through the drain valve (45). .

Claims (3)

CLAIMS l ^â . - Gas-water separator comprising a cylindrical separator wall system that is located at the top of a box so that between the separator wall system and the box wall inside which the separator wall system is located, form an annular space, a series of rotating blades, that is, capable of imparting a rotation movement to the gas entering the separator, which are located in said annular space, with the upper and lower parts of the said annular space and the inner tubular passage of said separating wall system in communication with an inlet opening, with a purge valve chamber and an outlet opening, respectively, characterized in that said gas-water separator includes some sloping walls in an oblique and descending way and some spiral walls, each of said spiral walls projecting from the inside out gradually from the upper end of each of the said inclined walls and towards the lower end of the respective inclined wall and connect in the area of the lower end of the corresponding inclined wall to a radial end wall in order to determine with the latter the formation of a sharp edge, finding said inclined walls and said spiral walls formed on an outer peripheral wall of said separator wall system. -192 ⁵ . Gas-water separator, according to claim 1, characterized in that it also includes longitudinal walls that project radially from the outer peripheral wall of said separator wall system, said longitudinal walls developing from bottom to top. from the upper end of said inclined walls. 3 ^â . Gas-water separator according to claim 1 or 2, characterized in that at least the outer peripheral surface of the wall of said separating wall system is formed so as to have a roughness similar to that of pear peel. 4 ^ã . Gas-water separator according to claim 1 or 2, characterized in that the outer periphery of the lower end of said separating wall system gradually protrudes from the inside as it descends in order to reduce the distance in eration to an interior surface of the separator box and in such a way that the angle of inclination that the outer periphery of said lower end with respect to the vertical is between the values of 25 and 50 degrees. Lisbon, February 13, 1986