The present disclosure relates in general to a field of process industry. Particularly, but not exclusively, the disclosure relates to a device for compression of a low pressure fluid by utilising a high pressure fluid, and separating the fluids based on density. Further, embodiments of the disclosure disclose a device including an ejector and a cyclone integrated together to compress the low pressure fluid by utilising the high pressure fluid, and separating the fluids based on density.
BACKGROUND OF THE DISCLOSURE
Jet pumps are used in a wide range of engineering fields. The particular advantage of the jet pumps lies in their flexibility and simplicity of operation and low level of maintenance. The jet pumps, also called as ejectors, are especially useful where a source of high energy fluid is available as a by-product of some other process, although this is by no means an essential requirement. In operation, a high-pressure motive fluid enters a gas chest at low velocity and expands through the converging-diverging nozzle of the jet pump. This results in a decrease in pressure and an increase in velocity. Meanwhile, the suction fluid enters at the suction inlet. The motive fluid, which is now at high velocity, entrains the suction fluid and combines with it. The two fluids are then recompressed through the diffuser. Potential energy may be converted to kinetic energy, thus, velocity increases and pressure decreases. The mixture reaches its maximum velocity and lowest pressure at a venturi throat. The fluid then may be discharged at an intermediate pressure, which is higher than the inlet suction fluid pressure, but much lower than the inlet motive fluid pressure. Jet pump systems range from the simple, single stage to very complex systems with as many as six stages in combination with inter condensers.
Similarly, cyclones are widely used in process industries for separating fluids of different densities. The cyclone may include a cylindrical chamber, into which a mixture of fluids may be introduced. The cyclone may separate mixture of fluids by inducing rotational effect and by utilizing gravity.
With increase in need for efficient operation of the systems in various fields such as oil and gas industry, process industry and the like, many advancements in technologies have been proposed. One such advancement may include utilizing an ejector to increase the pressure of the low pressure fluid utilising energy available in a high pressure fluid, and then separating the fluids based on density for further usage or application. This configuration, thus helps in

pressuring the low pressure fluid to an intermediate pressure without need of any additional source of energy, thus making the process efficient. Some of the applications of this configuration may include while not limited to flare gas recovery, flue gas treatment, off gas treatment, and the like.
Conventionally, the ejector and the cyclone may be employed in any system as two different units, and may be interconnected by a connecting member such as pipe, hose, and the like. The ejector may receive the high pressure fluid referred as motive fluid from the source and draws the low pressure fluid by utilising the energy of the high pressure fluid. The ejector pressurises the low pressure fluid to an intermediate pressure, and supplies to the cyclone for separating the fluids based on density. However, the passage of fluid through the connecting member interconnecting the ejector and cyclone may result in loss of pressure. This may affect the performance of the cyclone and also results in decrease in the downstream pressure.
The present disclosure is directed to overcome one or more limitations stated above or any other limitation associated with the prior art.
SUMMARY OF THE DISCLOSURE
The one or more shortcomings of the prior art are overcome by a device as claimed and additional advantages are provided through the provision of assembly as claimed in the present disclosure.
Additional features and advantages are realized through the techniques of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered a part of the claimed disclosure.
In one non-limiting embodiment of the disclosure, a device for recovering and separating a low pressure fluid is described. The device comprises an ejector. The ejector includes a housing configured into a first portion and a second portion divided by a venturi portion, and a nozzle disposed in the first portion of the housing. The nozzle is configured to receive a first fluid at a higher pressure and supply the first fluid into the housing at a high velocity. The high velocity of the first fluid creates a suction in the first portion to draw a second fluid at a lower pressure, and wherein, the second fluid mixes with the first fluid in the venturi portion and is pressurised in the second portion. The device further includes a cyclone for separating the first fluid and the second fluid. The cyclone comprises a cylindrical chamber comprising of a first predefined

height and a first diameter. An inlet channel, formed in a side portion of the cylindrical chamber, is integrated to the second portion of the housing for receiving a mixture of the first fluid and the second fluid. The cyclone further includes an inverted conical chamber extending from a lower portion of the cylindrical chamber for discharging the higher density fluid of the first fluid and the second fluid; and an outlet channel co-axially mounted in an upper portion of the cylindrical chamber to discharge the lighter density fluid of the first fluid and the second fluid.
In an embodiment, the nozzle is defined with a second diameter ranging from about 0.04 to 0.09 times of the first diameter. The included angle of the nozzle ranges from about 15 degrees to 20 degrees.
In an embodiment, an outlet of the nozzle is positioned at a first predetermined distance from the venturi portion. The first predetermined distance ranges from about 0.04-0.09 times of the first diameter.
In an embodiment, the venturi portion is defined with a first predetermined length ranging from about 0.5-1.5 times of the first diameter. The venturi portion is defined with a third predetermined diameter ranging from about 0.1-0.4 times of the first diameter.
In an embodiment, the first portion is a convergent portion and the second portion is a divergent portion.
In an embodiment, an included angle of a cone of the second portion ranges from about 5 degrees to about 15 degrees from the plane of venturi portion.
In an embodiment, the second portion is defined with a second predetermined length ranging from about 0.5-2 times of the first diameter.
In an embodiment, the inverted conical chamber is substantially frusto-conical in shape, having a base portion connected to the lower portion of the cylindrical chamber and an apex portion having an outlet port.
In an embodiment, the outlet channel defines a tubular internal surface having a receiving end extending vertically downward into the cylindrical chamber and a discharge opening extending outwardly above the upper portion of the cylindrical chamber.

In an embodiment, the inlet channel supplies the mixture of the first fluid and the second fluid tangentially into the cylindrical chamber, and induces a centrifugal downward force to the mixture within the cylindrical chamber.
It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined together to form a further embodiment of the disclosure.
The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
BRIEF DESCRIPTION OF THE ACCOMPANYING FIGURES
The novel features and characteristic of the disclosure are set forth in the appended claims. The disclosure itself, however, as well as a preferred mode of use, further objectives and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying figures. One or more embodiments are now described, by way of example only, with reference to the accompanying figures wherein like reference numerals represent like elements and in which:
FIG. 1 illustrates schematic view of a device including an ejector and a cyclone integrated together to compress the low pressure fluid by utilising high pressure fluid, and separating the fluids based on density, according to an embodiment of the present disclosure.
The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION
The foregoing has broadly outlined the features and technical advantages of the present disclosure in order that the detailed description of the disclosure that follows may be better

understood. Additional features and advantages of the disclosure will be described hereinafter which form the subject of the claims of the disclosure. It should be appreciated by those skilled in the art that the conception and specific embodiment disclosed may be readily utilized as a basis for modifying or designing other mechanism for carrying out the same purposes of the present disclosure. It should also be realized by those skilled in the art that such equivalent constructions do not depart from the scope of the disclosure as set forth in the appended claims. The novel features which are believed to be characteristic of the disclosure, both as to its organization and method of operation, together with further objects and advantages will be better understood from the following description when considered in conjunction with the accompanying figures. It is to be expressly understood, however, that each of the figures is provided for the purpose of illustration and description only and is not intended as a definition of the limits of the present disclosure.
Embodiments of the disclosure disclose a device for raising pressure of a low pressure fluid by using energy of the high pressure fluid, and then separating the fluids based on density. The device of the present disclosure includes an ejector and cyclone which are integrated together for raising pressure of a low pressure fluid by using energy of the high pressure fluid, and then separating the fluids based on density with improved operational efficiency.
The ejector includes a convergent portion, divergent portion, and a venturi portion, and functions like a jet pump, in which the kinetic energy of the high pressure fluid may be used to drive low pressure fluid. The high pressure fluid may be accelerated through a nozzle exit, which induces suction for drawing the low pressure fluid at the convergent portion. The low pressure fluid may be carried forward into the venturi portion which acts as a mixing chamber. The high pressure fluid may expand in the venturi portion and there may be a transfer of energy and momentum from the high pressure fluid to the low pressure fluid through a process of turbulent mixing. During this process there may be recovery of static pressure, but mixing two streams of unequal velocity leads to a loss of kinetic energy. At the end of the venturi portion, momentum exchange would be complete and the mixed fluids may be discharged, through a divergent portion called as diffuser which may be used for further static pressure recovery. The divergent portion of the ejector is integrated with an inlet of the cyclone. The cyclone may receive the mixed fluids at an intermediate pressure, and separate the fluids based on density. The integration of the cyclone with the ejector, reduces downstream pressure loss, and also improves separation efficiency of the cyclone.

The terms “comprises”, “comprising”, or any other variations thereof, are intended to cover a non-exclusive inclusion, such that an assembly, device or method that comprises a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup or device or method. In other words, one or more elements in a system or apparatus proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or apparatus.
In the following description, the words such as upper, lower, bottom, top are referred with respect to particular orientation of the device as illustrated in drawings of the present disclosure. The words are used to explain the aspects of the present disclosure and for better understanding. However, one should not construe such terms as limitation to the present disclosure, since the terms may interchange based on the orientation of the mechanism.
Henceforth, the present disclosure is explained with the help of figures which show one configuration of ejector and cyclone. However, such exemplary embodiments should not be construed as limitations of the present disclosure. A person skilled in the art can envisage various such embodiments without deviating from scope of the present disclosure.
Embodiments of the present disclosure disclose a device for raising pressure of a low pressure fluid by using energy of the high pressure fluid, and then separating the fluids based on density. The device may be used in process industry, for the applications including but not limited to flare gas recovery, flue gas treatment, off gas treatment, and the like.
Now referring to FIG. 1, the device (100) comprises an ejector (101) for raising pressure of a low pressure fluid by using energy of the high pressure fluid, and a cyclone (104) for separating the fluids based on density. The ejector (101), which may also be referred to as a jet pump, includes housing (102). The housing (102) is configured into a first portion (102a) and a second portion (102b) divided by a venturi portion (102c). The first portion (102a) of the housing (102) may be formed as a convergent section, and the second portion (102b) may be formed as a divergent section. The ejector (101) further includes a nozzle (103). The nozzle (103) may be positioned in the first portion (102a) of the ejector (101), and may be disposed in a fluid communication with a high pressure fluid source. The first portion (102a) of the housing (102) may be disposed in fluid communication with a low pressure fluid source.
7

The cyclone (104) of the device (100) may be integrated with the ejector (101). The cyclone
(104) comprises a cylindrical chamber (105), an inlet channel (106), an inverted conical
chamber (107) and an outlet channel (108). The cylindrical chamber (105) may have
substantially a cylindrical wall section having a longitudinal cavity of predefined height and a
first diameter (D1). The inlet channel (106) of the cyclone (104) may be integrally formed with
the second portion (102b) of the housing (102). The height (H2) of the cylindrical chamber
(105) may be in the range of 1.25 to 1.3 times the first diameter (D1). The inlet channel (106)
may be tangentially formed, and may be positioned close to the upper portion (105a) of
cylindrical chamber (105). The inlet channel (106) extends through a side portion of the
cylindrical chamber (105), for tangential introduction of the fluids into the cylindrical chamber
(105) and to induce a centrifugal downward force. The inlet channel (106) may be substantially
a tapered wedge shape having small cross-sectional flow area at a receiving end (108a). The
receiving end (108a) is having a predetermined inlet width (W1) and inlet height (H3). Inlet
width (W1) may be measured perpendicularly to axis of cylindrical chamber (105), whereas
the inlet height (H3) may be measured along the axis of cylindrical chamber (105). Further, the
inlet channel (106) may have a predefined centre distance measured from the upper portion
(105a) of said cylindrical chamber (105) to the centre of inlet height (H3). In an embodiment,
the inlet width (W1) is 0.1 to 0.4 times the first diameter (D1), the inlet height (H3) is 0.1 to
0.4 times the first diameter (D1) and the centre distance may be 0.05 to 1.15 times of the first
diameter (D1).
The inverted conical chamber (107) is coupled to a lower portion (105b) of the cylindrical chamber (105). The inverted conical chamber (107) is substantially a frusto-conical wall section having a base portion (107a) connected to the lower portion (105b) of the cylindrical chamber (105) and an apex portion (107b) having an outlet port (109). The outlet port (109) may have a predetermined outlet diameter, ranging from about 0.25 to 0.5 times the first diameter (D1). The cyclone (104) is further provided with the outlet channel (108) mounted co-axially to the upper portion (105a) of cylindrical chamber (105) for expelling light density fluid. The outlet channel (108) defines a tube having internal surface. The outlet channel (108) has a receiving end (108a) extending vertically downward into the cylindrical chamber (105) and a discharge opening (108b) extending outwardly therefrom above the upper portion (105a) of the cylindrical chamber (105). The internal surface of the outlet channel (108) has a predetermined diameter ranging from about 0.25 to about 0.5 time the first diameter (D1).
8

Furthermore, the receiving end (108a) of outlet channel (108) has a predefined depth measured from the upper portion (105a) of said cylindrical chamber (105) ranging from about 0 to 1.3 times the first diameter (D1).
Further, the ejector (101) is configured such that the dimensions of the ejector (101) may correspond to dimensions of the cyclone (104). The nozzle (103) of the ejector (101) may be defined with a second diameter (D2) ranging from about 0.04 to 0.09 times of the first diameter (D1). The nozzle (103) is configured with an included angle (α) ranging from about 15 degrees to 20 degrees. The ejector (101) is configured such that an outlet of the nozzle (103) is positioned at a first predetermined distance (H1) from the venturi portion (102c). The first predetermined distance (H1) ranges from about 0.04-0.09 time of the first diameter (D1). The venturi portion (102c) of the housing (102) is defined with a first predetermined length (L1) and a third predetermined diameter (D3). In an embodiment the first predetermined length ranges from about 0.5-1.5 times of the first diameter (D1), and the third predetermined diameter ranges from about 0.1-0.4 times of the first diameter (D1).
The second portion (102b) which is a divergent section of the ejector (101) is configured such that the included angle (β) of the cone of the second portion (102b) ranges from about 5 degrees to about 15 degrees from the plane of venturi portion (102c). Also, the second portion (102b) is defined with a second predetermined length (L2) ranging from about 0.5-2 times of the first diameter (D1).
The following paragraphs explain the working of the device (100) considering high pressure fluid as liquid and low pressure fluid as gas. The liquid also called the motive fluid enters from nozzle (103) whereas the gas enters the first portion (102a) of the housing (102). The liquid accelerated through a nozzle (103) induces the flow of the gas in the direction of the liquid. The gas is entrained due to viscous friction at the nozzle (103) periphery and carried forward into the venturi portion (102c). In an embodiment, the venturi portion (102c) may also be referred to as mixing chamber. The jet expands in the venturi portion (102c) and there is a transfer of energy and momentum from the liquid to gas through a process of turbulent mixing. During this process there may be some recovery of static pressure, but mixing two streams of unequal velocity leads to a loss of kinetic energy. At the end of the venturi portion (102c), momentum exchange may be complete and the mixed fluid is discharged, often through the second portion (102b) which is used for further static pressure recovery. The mixed fluid comes
9

out and can be pumped to wherever required. When the mixed fluid enters the cyclone (104), the gas exists from the top part of the cyclone (104) whereas the liquid exits from the bottom.
In an embodiment, the mixture of liquid and gas may be tangentially introduced into the cylindrical chamber (105) of each of the cyclone (104) through the inlet channel (106). The shape of the cylindrical chamber (105) and the inverted conical chamber (107) connected to the lower portion (105b) of cylindrical chamber (105) induces the mixture to spin creating a vortex. Larger or more dense particles i.e. liquid is forced outwards to the walls of the cylindrical chamber (105) and the inverted conical chamber (107). Subsequently, liquid flows down through the outlet of inverted conical chamber (107) due to gravity. Concurrently, lighter or less dense particles i.e. gas, reverses course and passes outwardly through the outlet channel (108).
In an embodiment, the device (100) achieves a gas separation efficiency of 90% to 95% and a liquid separation efficiency of 90% to 95% respectively.
In an embodiment, the device (100) provides an economical option with low operational and capital costs.
In an embodiment, the device (100) improves the pumping efficiency by 25% to 50%.
In an embodiment, the device (100) helps to reduce the downstream pressure loss by 20% to 30%.
It is to be understood that, the use of liquid as high pressure fluid and gas as low pressure fluid is an exemplary embodiment. One skilled in the art would use any fluid where such need exists. Such modifications and variations may be made without departing from the scope of the present disclosure. Therefore, it is intended that the present disclosure covers such modifications and variations provided they come within the ambit of the appended claims and their equivalents.
Equivalents:
With respect to the use of substantially any plural and/or singular terms herein, those having skill in the art can translate from the plural to the singular and/or from the singular to the plural as is appropriate to the context and/or application. The various singular/plural permutations may be expressly set forth herein for sake of clarity.
10

It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B.”
11

While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.
Referral Numerals:

Reference Number Description
100 Device
101 Ejector
102 Housing
102a First portion
102b Second portion
102c Venturi portion
103 Nozzle
104 Cyclone
105 Cylindrical chamber
105a Upper portion
105b Lower portion
106 Inlet channel
107 Inverted conical chamber
107a Base portion
107b Apex portion
108 Outlet channel
108a Receiving end
108b Discharge opening
109 Outlet port
D1 First diameter
D2 Second diameter
a Included angle of the nozzle
H1 First predetermined distance
12

LI First predetermined length
D3 Third predetermined diameter
P Included angle of the cone
L2 Second predetermined length
H2 Height of the cylindrical chamber
H3 Inlet height
Wl Inlet width

We Claim

A device (100), comprising:
an ejector (101), comprising:
a housing (102) configured into a first portion (102a) and a second portion (102b) divided by a venturi portion (102c); and
a nozzle (103) disposed in the first portion (102a) of the housing (102), the nozzle (103) is configured to receive a first fluid at a higher pressure and supply the first fluid into the housing (102) at a high velocity;
wherein, the high velocity of the first fluid creates a suction in the first portion (102a) to draw a second fluid at a lower pressure, and wherein, the second fluid mixes with the first fluid in the venturi portion (102c) and gets pressurised in the second portion (102b); and
a cyclone (104) for separating the first fluid and the second fluid, the cyclone (104) comprising:
a cylindrical chamber (105) comprising of a first predefined height and a first diameter (Dl);
an inlet channel (106) formed in a side portion of the cylindrical chamber (!05), the inlet channel (106) is integrated to the second portion (102b) of the housing (102), for receiving a mixture of the first fluid and the second fluid;
an inverted conical chamber (107) extending from a lower portion of the cylindrical chamber (105) for discharging a high density fluid of the fist fluid and the second fluid; and
an outlet channel (108) co-axially mounted in an upper portion of the cylindrical chamber (105) to discharge a light density fluid of the fist fluid and the second fluid.
The device as claimed in claim 1, wherein the nozzle (103) is defined with a second diameter (D2) ranging from about 0.04 to 0.09 times of the first diameter (Dl).
The device as claimed in claim 1, wherein an included angle (a) of the nozzle (103) ranges from about 15 degrees to 20 degrees.
The device as claimed in claim 1, wherein an outlet of the nozzle (103) is positioned at a first predetermined distance (HI) from the venturi portion (102c).

The device as claimed in claim 4, wherein the first predetermined distance (HI) ranges from about 0.04-0.09 time of the first diameter (Dl).
The device as claimed in claim 1, wherein the venturi portion (102c) is defined with a first predetermined length (LI) ranging from about 0.5-1.5 times of the first diameter (Dl).
The device as claimed in claim 1, wherein the venturi portion (102c) is defined with a third predetermined diameter (D3) ranging from about 0.1-0.4 times of the first diameter (Dl).
The device as claimed in claim 1, wherein the first portion (102a) is a convergent portion and the second portion (102b) is a divergent portion.
The device as claimed in claim 1, wherein an included angle (P) of a cone of the second portion (102b) ranges from about 5 degrees to about 15 degrees from the plane of venturi portion (102c).
The device as claimed in claim 1, wherein the second portion (102b) is defined with a second predetermined length (L2) ranging from about 0.5-2 times of the first diameter (Dl).
The device as claimed in claim 1, wherein the inverted conical chamber (107) is substantially frusto-conical in shape, having a base portion (107a) connected to the lower portion of the cylindrical chamber (105) and an apex portion (107b) having an outlet port (109).
The device as claimed in claim 1, wherein the outlet channel (108) defines a tubular internal surface having a receiving end (108a) extending vertically downward into the cylindrical chamber (105) and a discharge opening (108b) extending outwardly above the upper portion of the cylindrical chamber (105).

The device as claimed in claim 1, wherein the inlet channel (106) supplies the mixture of the first fluid and the second fluid tangentially into the cylindrical chamber (105) and induces a centrifugal downward force to the mixture within the cylindrical chamber (105).